Carrier Camper 48TFD008 014 User Manual
48TFD008-014  
48TFE008-014  
48TFF008,012  
Single-Package Rooftop Heating/Cooling Units  
50 Hz  
Installation, Start-Up and  
Service Instructions  
CONTENTS  
Page  
Disconnect gas piping from unit when leak test-  
ing at pressure greater than 3.4 kPa (1/2 psig).  
Pressures greater than 3.4 kPa (1/2 psig) will  
cause gas valve damage resulting in hazardous  
condition. If gas valve is ever subjected to pres-  
sure greater than 3.4 kPa (1/2 psig), it must be  
replaced before use. When pressure testing  
field-supplied gas piping at pressures of 3.4 kPa  
(1/2 psig) or less, a unit connected to such piping  
must be isolated by manually closing the gas  
valve(s).  
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 1  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33  
Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1  
• ROOF CURB  
• SLAB MOUNT  
Step 2 — Field Fabricate Ductwork. . . . . . . . . . . . . . . 2  
Step 3 — Install External Trap for  
Condensate Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 2  
• POSITIONING  
Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . . 8  
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . . 8  
Step 7 — Make Electrical Connection . . . . . . . . . . . . 8  
• FIELD POWER SUPPLY  
• FIELD CONTROL WIRING  
• HEAT ANTICIPATOR SETTINGS  
Before performing service or maintenance operations on  
unit, turn off main power switch to unit. Electrical shock  
could cause personal injury.  
Step 8 — Adjust Factory-Installed Options . . . . . . 11  
• APOLLO CONTROL  
• MANUAL OUTDOOR-AIR DAMPER  
• OPTIONAL DURABLADE ECONOMIZER  
• OPTIONAL ECONOMI$ER  
INSTALLATION  
Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . . 20  
Unit is shipped in the vertical discharge configuration. To  
convert to horizontal configuration, remove screws from side  
duct opening covers and remove covers. Using the same  
screws, install covers on vertical duct openings with the insula-  
tion side down. Seals around duct openings must be tight. See  
Fig. 1.  
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36  
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-41  
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 42-46  
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . CL-1  
Step 1 — Provide Unit Support  
ROOF CURB — Assemble and install accessory roof curb in  
accordance with instructions shipped with curb. See Fig. 2. In-  
stall insulation, cant strips, roofing felt, and counter flashing as  
shown. Ductwork must be attached to curb. If gas, electric  
power or control power is to be routed through the curb, attach  
the accessory thru-the-curb service connection plates to the  
roof curb in accordance with the accessory installation instruc-  
tions. Connection plates must be installed before unit is set in  
roof curb.  
SAFETY CONSIDERATIONS  
Installation and servicing of air-conditioning equipment can  
be hazardous due to system pressure and electrical compo-  
nents. Only trained and qualified service personnel should  
install, repair, or service air-conditioning equipment.  
Untrained personnel can perform basic maintenance func-  
tions of cleaning coils and filters and replacing filters. All other  
operations should be performed by trained service personnel.  
When working on air-conditioning equipment, observe precau-  
tions in the literature, tags and labels attached to the unit, and  
other safety precautions that may apply.  
IMPORTANT: The gasketing of the unit to the roof curb  
is critical for a watertight seal. Install gasket supplied  
with the roof curb as shown in Fig. 2. Improperly  
applied gasket can also result in air leaks and poor unit  
performance.  
Curb should be level. Unit leveling tolerances are shown in  
Fig. 3. This is necessary for unit drain to function properly. Re-  
fer to Accessory Roof Curb Installation Instructions for addi-  
tional information as required.  
Follow all safety codes. Wear safety glasses and work  
gloves. Use quenching cloth for unbrazing operations. Have  
fire extinguishers available for all brazing operations.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 004-816 Printed in U.S.A. Form 48TF-C1SI Pg 1 1-01 Replaces: New  
Book 1  
4
Tab 1a 6a  
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D ALT  
DRAIN  
HOLE  
ROOF CURB  
ACCESSORY  
CRRFCURB003A00 1′-2″ [356]  
CRRFCURB004A00 2′-0″ [610]  
UNIT SIZE  
48TF  
CONNECTOR  
PKG. ACCY.  
“A”  
B
C
GAS  
POWER  
CONTROL  
CRBTMPWR001A00  
CRBTMPWR002A00  
3/4″ [19] NPT  
11/4″ [31.7]  
3/4″  
1/2″  
008-014  
[19] NPT  
[12.7]  
2′-87/16  
″
1′-1015  
/
″
13/4″  
1/2″  
[827]  
[583]16  
[44.5]  
CRBTMPWR003A00  
CRBTMPWR004A00  
3/4″ [19] NPT  
NOTES:  
1/2″  
[12.7] NPT  
1. Roof curb accessory is shipped disassembled.  
2. Insulated panels: 1-in. [25] thick polyurethane  
foam, 13/4 lb density.  
3/4″  
[12.7]  
11/4″ [31.7]  
[19] NPT  
3. Dimensions in [ ] are in millimeters.  
4. Roof curb: 16-gage steel.  
5. Attach ductwork to curb (flanges of duct rest on  
curb).  
6. Service clearance 4 ft [1219] on each side.  
7.  
Direction of airflow.  
8. Connector packages CRBTMPWR001A00 and  
2A00 are for thru-the-curb gas type. Packages  
CRBTMPWR003A00 and 4A00 are for thru-  
the-bottom type gas connections.  
Fig. 2 — Roof Curb Details  
3
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Although unit is weatherproof, guard against water from  
higher level runoff and overhangs.  
Position unit on roof curb so that the following clearances  
are maintained: 7 mm (1/4-in.) clearance between roof curb and  
base rails on each side and duct end of unit; 84 mm (35/16-in.)  
clearance between roof curb and condenser coil end of unit.  
(See Fig. 2, section C-C.)  
Locate mechanical draft system flue assembly at least  
1219 mm (48 in.) from any opening through which combustion  
products could enter the building, and at least 1219 mm (48 in.)  
from an adjacent building or combustible material. When unit  
is located adjacent to public walkways, flue assembly must be  
at least 2.13 m (7 ft) above grade.  
Flue vent discharge must have a minimum horizontal clear-  
ance of 1219 mm (48 in.) from electric and gas meters, gas reg-  
ulators, and gas relief equipment.  
MAXIMUM ALLOWABLE  
DIFFERENCE mm (in.)  
A-B  
B-C  
A-C  
13 (0.5)  
25 (1.0)  
25 (1.0)  
Fig. 3 — Unit Leveling Tolerances  
Flue gas can deteriorate building materials. Orient unit so  
that flue gas will not affect building materials.  
Adequate combustion-air space must be provided for proper  
operation of this equipment. Be sure that installation complies  
with all local codes and Section 5.3, Air for Combustion and  
Ventilation, NFGC (National Fuel Gas Code), ANSI (Ameri-  
can National Standards Institute), latest revision, U.S.A.  
Standards.  
(Copy continued on page 8.)  
DRAIN PLUG  
NOTE: Drain plug is shown in factory-installed position.  
Fig. 4 — Condensate Drain Pan  
NOTES:  
1. Dimension in ( ) is in millimeters.  
DIMENSIONS  
‘‘B’’  
lb kg in. mm in. mm in. mm  
870 395 87.38 2219 40.25 1022 41.31 1050  
1035 469 87.38 2219 40.25 1022 49.31 1253  
1050 476 87.38 2219 40.25 1022 49.31 1253  
MAX  
2. Hook rigging shackles through holes in base rail as shown in  
detail ‘‘A.’’ Holes in base rails are centered around the unit cen-  
ter of gravity. Use wooden top skid when rigging to prevent rig-  
ging straps from damaging unit.  
3. Weights include base unit without economizer. See Tables 1A  
and 1B for economizer weights.  
UNIT  
48TF  
WEIGHT  
‘‘A’’  
‘‘C’’  
D/E/F008  
D/E/F012  
D/E014  
All panels must be in place when rigging.  
Fig. 5 — Rigging Details  
4
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Table 1A — Physical Data (SI)  
UNIT SIZE 48TF  
Low Heat (D), Medium Heat (E), High Heat (F)  
NOMINAL CAPACITY (kW)  
008  
E
012  
E
014  
D
F
D
F
D
E
21.5  
29.2  
35.9  
OPERATING WEIGHT (kg)  
Unit  
395  
20  
469  
20  
476  
20  
Durablade Economizer  
EconoMi$er  
28  
28  
28  
Roof Curb*  
65  
65  
65  
COMPRESSOR TYPE  
Quantity  
Oil (ml)  
Hermetic  
2
1479 ea  
Hermetic  
2
1479 ea  
Scroll  
2
1597 ea  
REFRIGERANT TYPE  
Operating Charge (kg)  
Circuit 1  
R-22  
2.10  
2.22  
3.08  
3.22  
3.49  
3.49  
Circuit 2  
CONDENSER COIL  
Rows...Fins/m  
Total Face Area (sq m)  
Enhanced Copper Tubes, Aluminum Lanced Fins  
1...669  
1.90  
2...669  
1.92  
2...669  
2.30  
CONDENSER FAN  
Nominal L/s  
Quantity...Diameter (mm)  
Motor BkW...r/s  
Propeller Type  
3050  
2880  
2...559  
.19...15.5  
3050  
2...559  
.19...15.5  
2...559  
.19...15.5  
EVAPORATOR COIL  
Rows...Fins/m  
Total Face Area (sq m)  
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device  
3...590  
0.74  
3...590  
0.93  
4...590  
1.03  
EVAPORATOR FAN  
Centrifugal Type  
Quantity...Size (mm x mm)  
Type Drive  
1...381 x 381  
Belt  
1...381 x 381  
Belt  
1...381 x 381  
Belt  
Nominal L/s  
Motor kW  
1230  
1700  
1980  
1.12  
1.50  
2.24  
Maximum Continuous BkW  
Motor Frame Size  
1.79  
1.79  
2.76  
56  
56  
56  
Fan r/s Range  
8.2-11.7  
Ball  
9.5-13.0  
Ball  
12.0-15.0  
Ball  
Motor Bearing Type  
Maximum Allowable r/s  
Motor Pulley Pitch Diameter Min/Max (mm)  
Nominal Motor Shaft Diameter (mm)  
Fan Pulley Pitch Diameter (mm)  
Nominal Fan Shaft Diameter (mm)  
Belt, Quantity...Type...Length (mm)  
Pulley Center Line Distance (mm)  
Speed Change per Full Turn of  
Movable Pulley Flange (r/s)  
Movable Pulley Maximum Full Turns  
From Closed Position  
26.7  
26.7  
26.7  
61/86  
16  
71/97  
16  
102/127  
22  
178  
25  
178  
25  
203  
25  
1...A...1245  
425-489  
1...A...1245  
403-445  
1...A...1346  
403-445  
.70  
.70  
.60  
5
5
5
Factory Setting  
Factory Speed Setting (r/s)  
Fan Shaft Diameter at Pulley (mm)  
5
8.2  
25  
5
9.5  
25  
5
12.0  
25  
FURNACE SECTION  
Rollout Switch Cutout Temp (C)  
Burner Orifice Diameter (mm)  
90.6  
90.6  
90.6  
Natural Gas  
— Std  
3.05  
2.44  
3.05  
2.44  
3.05  
2.44  
3.28  
2.59  
3.05  
3.28  
2.59  
Liquid Propane — Alt  
Thermostat Heat Anticipator Setting (amps)  
400 v Stage 1  
2.44  
.14  
.14  
.14  
.20  
.14  
.20  
.14  
.20  
.14  
.20  
Stage 2  
Gas Input (kW)  
Stage 1  
Stage 2  
21.1  
31.4  
31.9  
50.4  
80  
39.8  
59.8  
31.9  
50.4  
39.8  
59.8  
80  
43.9  
65.6  
39.8  
59.8  
43.9  
65.6  
Efficiency (Steady State) (%)  
Temperature Rise Range (C)  
Manifold Pressure (kPa)  
80  
–6-10  
2-18  
7-24  
2-18  
7-24  
4-21  
7-24  
4-21  
Natural Gas  
— Std  
8.3  
8.3  
19  
8.3  
8.3  
19  
8.3  
8.3  
Liquid Propane — Alt  
Field Gas Connection Size (mm)  
13  
19  
19  
19  
19  
19  
HIGH-PRESSURE SWITCH (kPa)  
Standard Compressor  
Internal Relief (Differential)  
Cutout  
3103 345  
3448 345  
2951  
2206  
Reset (Auto.)  
LOW-PRESSURE SWITCH (kPa)  
Cutout  
Reset (Auto.)  
48 21  
152 48  
FREEZE PROTECTION THERMOSTAT  
Opens (C)  
Closes (C)  
–1  
7
3
3
OUTDOOR-AIR INLET SCREENS  
Quantity...Size (mm)  
Cleanable  
1...508 x 635 x 25  
1...406 x 635 x 25  
RETURN-AIR FILTERS  
Quantity...Size (mm)  
Throwaway  
4...406 x 508 x 51  
4...508 x 508 x 51  
4...508 x 508 x 51  
LEGEND  
*Weight of 356 mm (14-in.) roof curb.  
Bhp  
—
Brake Horsepower  
NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in  
the liquid line.  
BkW — Fan Input Watts x Motor Efficiency  
5
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Table 1B — Physical Data (English)  
UNIT SIZE 48TF  
Low Heat (D), Medium Heat (E), High Heat (F)  
NOMINAL CAPACITY (tons)  
008  
E
012  
E
014  
D
F
D
F
D
E
6.1  
8.3  
10.2  
OPERATING WEIGHT (lb)  
Unit  
870  
44  
1035  
44  
1050  
44  
Durablade Economizer  
EconoMi$er  
62  
62  
62  
Roof Curb*  
143  
143  
143  
COMPRESSOR TYPE  
Quantity  
Oil (oz)  
Hermetic  
2
50 ea  
Hermetic  
2
50 ea  
Scroll  
2
54 ea  
REFRIGERANT TYPE  
Operating Charge (lb-oz)  
Circuit 1  
R-22  
4-10  
4-11  
6-13  
7- 2  
7-11  
7- 8  
Circuit 2  
CONDENSER COIL  
Rows...Fins/in.  
Total Face Area (sq ft)  
Enhanced Copper Tubes, Aluminum Lanced Fins  
1...17  
20.50  
2...17  
20.50  
2...17  
25.00  
CONDENSER FAN  
Nominal Cfm  
Quantity...Diameter (in.)  
Motor BkW...Rpm  
Propeller Type  
6500  
6100  
2...22  
6500  
2...22  
2...22  
1/4...930  
1/4...930  
1/4...930  
EVAPORATOR COIL  
Rows...Fins/in.  
Total Face Area (sq ft)  
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device  
3...15  
8.0  
3...15  
10.0  
4...15  
11.1  
EVAPORATOR FAN  
Centrifugal Type  
Quantity...Size (in.)  
1...15 x 15  
Belt  
1...15 x 15  
Belt  
1...15 x 15  
Belt  
Type Drive  
Nominal Cfm  
2600  
3500  
2
4200  
3
Motor Hp  
11/2  
Maximum Continuous Bhp  
Motor Frame Size  
2.40  
2.40  
3.70  
56  
56  
56  
Fan Rpm Range  
492-700  
Ball  
571-779  
Ball  
717-900  
Ball  
Motor Bearing Type  
Maximum Allowable Rpm  
Motor Pulley Pitch Diameter Min/Max (in.)  
Nominal Motor Shaft Diameter (in.)  
Fan Pulley Pitch Diameter (in.)  
Nominal Fan Shaft Diameter (in.)  
Belt, Quantity...Type...Length (in.)  
Pulley Center Line Distance (in.)  
Speed Change per Full Turn of  
Movable Pulley Flange (rpm)  
Movable Pulley Maximum Full Turns  
From Closed Position  
1600  
1600  
1600  
2.4/3.4  
2.8/3.8  
4.0/5.0  
5
5
7
/
/
8
/
7.80  
—
7.0  
—
8.80  
—
1...A...49  
16.75-19.25  
1...A...49  
15.85-17.50  
1...A...53  
15.85-17.50  
41  
41  
36  
5
5
5
Factory Setting  
Factory Speed Setting (rpm)  
Fan Shaft Diameter at Pulley (in.)  
5
492  
1
5
571  
1
5
717  
1
FURNACE SECTION  
Rollout Switch Cutout Temp (F)  
Burner Orifice Diameter (in. ...drill size)  
195  
195  
195  
Natural Gas  
— Std  
.120...31  
.096...41  
.120...31  
.120...31  
.096...41  
.129...30  
.102...38  
.120...31  
.129...30  
.102...38  
Liquid Propane — Alt  
Thermostat Heat Anticipator Setting (amps)  
400 v Stage 1  
.096...41  
.096...41  
.14  
.14  
.14  
.20  
.14  
.14  
.20  
.14  
.20  
Stage 2  
.20  
Gas Input (Btuh) Stage 1  
72,000  
107,000  
109,000  
172,000  
80  
136,000  
204,000  
109,000  
172,000  
136,000  
204,000  
80  
150,000  
224,000  
136,000  
204,000  
150,000  
224,000  
‘
Efficiency (Steady State) (%)  
Temperature Rise Range (F)  
Manifold Pressure (in. wg)  
80  
20-50  
35-65  
45-75  
35-65  
45-75  
40-70  
45-75  
40-70  
Natural Gas  
— Std  
3.5  
3.5  
3.5  
Liquid Propane — Alt  
3.5  
3.5  
3.5  
1
3
3
3
3
Field Gas Connection Size (in.)  
/
2
/
4
/
4
/
4
/
4
HIGH-PRESSURE SWITCH (psig)  
Standard Compressor  
Internal Relief (Differential)  
Cutout  
450 50  
500 50  
428  
320  
Reset (Auto.)  
LOW-PRESSURE SWITCH (psig)  
Cutout  
Reset (Auto.)  
7
22  
3
7
FREEZE PROTECTION THERMOSTAT  
Opens (F)  
Closes (F)  
30  
45  
5
5
OUTDOOR-AIR INLET SCREENS  
Quantity...Size (in.)  
Cleanable  
1...20 x 25 x 1  
1...16 x 25 x 1  
RETURN-AIR FILTERS  
Quantity...Size (in.)  
Throwaway  
4...16 x 20 x 2  
4...20 x 20 x 2  
4...20 x 20 x 2  
LEGEND  
*Weight of 356 mm (14-in.) roof curb.  
Bhp  
—
Brake Horsepower  
NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in  
the liquid line.  
BkW — Fan Input Watts x Motor Efficiency  
6
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DURABLADE  
ECONOMIZER  
WEIGHT  
STANDARD  
ECONOMI$ER  
WEIGHT  
CORNER  
CORNER  
CORNER  
CORNER  
“H”  
“J”  
“K”  
ft-in.  
“L”  
UNIT  
48TF  
UNIT WEIGHT  
WEIGHT (A) WEIGHT (B) WEIGHT (C) WEIGHT (D)  
Lb  
Kg  
Lb  
Kg  
Lb  
Kg  
Lb  
Kg  
Lb  
Kg  
Lb  
Kg  
Lb  
Kg  
ft-in. [mm] ft-in. [mm]  
[mm] ft-in. [mm]  
D/E/F008  
D/E/F012  
D/E014  
870  
1035  
1050  
395  
469  
476  
44  
44  
44  
20  
20  
20  
62  
62  
62  
28  
28  
28  
189  
225  
228  
86  
102  
103  
161  
192  
195  
73  
87  
88  
239  
285  
289  
109  
129  
131  
280  
333  
338  
127 1-27/8 [ 378] 3-55/16 [1050] 2-911  
151 2-57/8 [ 759] 4-15/16 [1253] 3-03/8  
153 1-27/8 [ 378] 4-15/16 [1253] 3-03/8  
/
[856] 2- 27/16 [672]  
[924] 2-107/16 [875]  
[924] 2-107/16 [875]  
16  
BOTTOM POWER CHART, THESE HOLES  
REQUIRED FOR USE WITH ACCESSORY  
PACKAGES — CRBTMPWR002A00 (POWER  
AND CONTROL) AND CRBTMPWR004A00  
(POWER, CONTROL, AND GAS)  
NOTES:  
CONNECTION SIZES  
1. Dimensions in [ ] are in millimeters.  
A
B
C
D
E
13/8″ Dia [35] Field Power Supply Hole  
21/2″ Dia [64] Power Supply Knockout  
13/4″ Dia [44] Charging Port Hole  
2.  
3.  
Center of gravity.  
Direction of airflow.  
7/8″ Dia [22] Field Control Wiring Hole  
3/4″ [19] - 14 NPT Condensate Drain  
THREADED  
CONDUIT  
SIZE  
REQURED  
HOLE SIZES  
(MAX.)  
WIRE  
USE  
4. On vertical discharge units, ductwork to be attached to  
accessory roof curb only. For horizontal discharge units,  
field-supplied flanges should be attached to horizontal dis-  
charge openings, and all ductwork should be attached to  
the flanges.  
5. Minimum clearance (local codes or jurisdiction may prevail):  
a. Between unit, flue side and combustible surfaces,  
36 in. [914].  
1/2″ [13] - 14 NPT Gas Connection 48TFD008  
3/4″ [19] - 14 NPT Gas Connection 48TFE,F008  
48TFD,E012 & 014, 48TJF012  
1/2″ [12.7]  
24 V  
Power  
Gas  
7/8″ [22.2]  
13/4″ [44.4]  
15/8″ [41.3]  
F
11/4″ [31.7]  
3/  
G
2″ Dia [51] Power Supply Knockout  
4″ [19] FPT  
b. Bottom of unit to combustible surfaces (when not using  
curb), 1 in. [25]. Bottom of base rail to combustible sur-  
faces (when not using curb) 0 inches.  
c. Condenser coil, for proper airflow, 36 in. [914] one side,  
12 in. [304] the other. The side getting the greater clear-  
ance is optional.  
d. Overhead, 60 in. [1624] to assure proper condenser fan  
operation.  
e. Between units, control box side, 42 in. [1067] per NEC  
(National Electrical Code).  
f. Between unit and ungrounded surfaces, control box  
side, 36 in. [914] per NEC.  
g. Between unit and block or concrete walls and other  
grounded surfaces, control box side, 42 in. [1067] per  
NEC.  
h. Horizontal supply and return end, 0 inches.  
6. With the exception of the clearance for the condenser coil  
and combustion side as stated in notes 5a, b and c, a  
removable fence or barricade requires no clearance.  
7. Units may be installed on combustible floors made from  
wood or Class A, B, or C roof covering material if set on  
base rail.  
8. The vertical center of gravity is 1′-7″ [483] for 008, 1′-11″  
[584] for 012 and 014 up from the bottom of the base rail.  
Fig. 6 — Base Unit Dimensions  
7
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Step 5 — Install Flue Hood — Flue hood is shipped  
screwed to the burner compartment access panel. Remove  
from shipping location and, using screws provided, install flue  
hood and screen in location shown in Fig. 7.  
Step 6 — Install Gas Piping — Unit is equipped for  
use with type of gas shown on nameplate. Refer to local  
building codes.  
For natural gas applications, gas pressure at unit gas connec-  
tion must not be less than 13.5 kPa (4.0 in. wg) (17.0 kPa  
[5.0 in. wg] in high heat units) or greater than 44.0 kPa  
(13.0 in. wg) while unit is operating. For liquid propane applica-  
tions, the gas pressure must not be less than 17.0 kPa (5.0 in. wg)  
or greater than 44.0 kPa (13.0 in. wg) at the unit connection.  
Size gas supply piping for 1.7 kPa (0.5 in. wg) maximum  
pressure drop. Do not use supply pipe smaller than unit gas  
connection.  
NOTE: When installing gas piping to gas valve inlet, use prop-  
erly sized back-up wrench on inlet flange flats.  
Fig. 7 — Flue Hood Details  
Support gas piping as shown in the table in Fig. 8. For ex-  
ample, a 19 mm (3/4-in.) gas pipe must have one field-  
fabricated support beam every 2.4 m (8 ft).  
See Fig. 8 for typical pipe guide and locations of external  
manual gas shutoff valve.  
X
228 mm (9") MINIMUM CLEARANCE  
FOR PANELREMOVAL  
GAS  
MANUAL GAS  
SHUTOFF VALVE*  
REGULATOR*  
BASE UNIT  
Step 7 — Make Electrical Connections  
1219 mm (48") MINIMUM  
DRIP LEG PER NFGC*  
BASE RAIL  
Unit cabinet must have an uninterrupted, unbroken electri-  
cal ground to minimize the possibility of personal injury if  
an electrical fault should occur. This ground may consist of  
electrical wire connected to unit ground lug in control com-  
partment, or conduit approved for electrical ground when  
installed in accordance with NEC (National Electrical  
Code), ANSI/NFPA (National Fire Protection Associa-  
tion), latest edition (U.S.A. Standards), and local electrical  
codes. Do not use gas piping as an electrical ground. Fail-  
ure to follow this warning could result in the installer being  
liable for personal injury of others.  
ROOF CURB  
FIELD-FABRICATED  
SUPPORT*  
FROM GAS METER  
LEGEND  
NFGC — National Fuel Gas Code (U.S.A. Standard)  
*Field supplied.  
NOTE: Follow all local codes.  
SPACING OF SUPPORTS  
STEEL PIPE NOMINAL DIAMETER  
mm (in.)  
X DIMENSION  
m (ft)  
13 (1/2)  
1.8 (6)  
2.4 (8)  
3.0 (10)  
FIELD POWER SUPPLY — All units are factory wired for  
the voltage shown on the nameplate.  
Refer to unit label diagram for additional information. Pig-  
tails are provided for field service.  
When installing units, provide a disconnect per local codes.  
Use copper conductors only when splice connectors are used.  
19 or 25 (3/4 or 1)  
32 or larger (11/4 or larger)  
Fig. 8 — Gas Piping Guide (With Accessory  
Thru-the-Curb Service Connections)  
All field wiring must comply with local requirements.  
FIELD CONTROL WIRING — Install a Carrier-approved  
accessory thermostat assembly according to installation in-  
structions included with the accessory. Locate thermostat  
assembly on a solid wall in the conditioned space to sense aver-  
age temperature in accordance with thermostat installation  
instructions.  
NOTE: For wire runs up to 15 m (50 ft), use no. 18 AWG  
(American Wire Gage) insulated wire (35 C minimum). For 15  
to 23 m (51 to 75 ft), use no. 16 AWG insulated wire (35 C  
minimum). For over 23 m (75 ft), use no. 14 AWG insulated  
wire (35 C minimum). All wire larger than no. 18 AWG cannot  
be directly connected to the thermostat and will require a junc-  
tion box and splice at the thermostat. Refer to Table 3 for wire  
conversions.  
Install conduit through side panel openings indicated in  
Fig. 6. Route power lines through connector to terminal con-  
nections as shown in Fig. 9.  
Voltages between phases must be balanced within 2% and  
the current within 10%. Use the formula shown in Table 2,  
Note 2 to determine the percentage of voltage imbalance. Op-  
eration on improper line voltage or excessive phase imbalance  
constitutes abuse and may cause damage to electrical compo-  
nents. Such operation would invalidate any applicable Carrier  
warranty.  
NOTE: If field-installed thru-the-bottom connections are used,  
refer to the accessory installation instructions for power wiring.  
Refer to Fig. 6 for drilling holes in basepan.  
8
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Table 2 — Electrical Data  
VOLTAGE  
RANGE  
COMPR  
(ea)  
OFM  
(ea)  
FLA  
MINIMUM UNIT  
DISCONNECT  
NOMINAL  
VOLTAGE  
(50 Hz)  
400  
(3 phase)  
400  
(3 phase)  
400  
(3 phase)  
IFM  
FLA  
2.6  
POWER SUPPLY  
UNIT  
48TF  
Min  
Max  
RLA  
LRA  
MCA  
MOCP*  
FLA  
LRA  
008  
012  
014  
360  
360  
360  
440  
6.4  
8.9  
42.0  
0.3  
17.6  
23.2  
29.4  
20  
18  
108  
440  
440  
52.0  
73.0  
0.3  
0.7  
2.6  
5.4  
30  
35  
24  
31  
128  
192  
10.4  
LEGEND  
Example: Supply voltage is 400-3-50.  
FLA — Full Load Amps  
HACR — Heating, Air Conditioning and Refrigeration  
AB = 393 v  
BC = 403 v  
AC = 396 v  
IFM  
— Indoor (Evaporator) Fan Motor  
LRA — Locked Rotor Amps  
MCA — Minimum Circuit Amps  
MOCP — Maximum Overcurrent Protection  
NEC — National Electrical Code (U.S.A.)  
OFM — Outdoor (Condenser) Fan Motor  
RLA — Rated Load Amps  
393 + 403 + 396  
3
Average Voltage =  
1192  
3
=
*Fuse or HACR circuit breaker.  
= 397  
Determine maximum deviation from average voltage.  
(AB) 397 – 393 = 4 v  
(BC) 403 – 397 = 6 v  
(AC) 397 – 396 = 1 v  
Maximum deviation is 6 v.  
Determine percent of voltage imbalance.  
6
% Voltage Imbalance = 100 x  
397  
NOTES:  
1. In compliance with NEC requirements (U.S.A. Standard) for  
multimotor and combination load equipment (refer to NEC Arti-  
cles 430 and 440), the overcurrent protective device for the unit  
shall be fuse or HACR breaker.  
2. Unbalanced 3-Phase Supply Voltage  
= 1.5%  
Never operate a motor where a phase imbalance in supply volt-  
age is greater than 2%. Use the following formula to determine  
the percent of voltage imbalance.  
This amount of phase imbalance is satisfactory as it is below the  
maximum allowable 2%.  
IMPORTANT: If the supply voltage phase imbalance is  
more than 2%, contact your local electric utility company  
immediately.  
% Voltage Imbalance  
max voltage deviation from average voltage  
= 100 x  
average voltage  
Route thermostat cable or equivalent single leads of colored  
wire from thermostat subbase terminals to low-voltage connec-  
tions on unit (shown in Fig. 10) as described in Steps 1-4  
below.  
1. If unit is mounted on roof curb and accessory thru-the-  
curb service plate connection is used, route wire through  
connection plate.  
2. Pass control wires through the hole provided on unit (see  
connection D in Connection Sizes table in Fig. 6).  
3. Feed wires through the raceway built into the corner post  
to the 24-v barrier located on the left side of the control  
box. See Fig. 11. The raceway provides the UL-required  
(Underwriters’ Laboratories) clearance between high-  
and low-voltage wiring.  
4. Connect thermostat wires to screw terminals on low-  
voltage connection board.  
HEAT ANTICIPATOR SETTINGS — Set heat anticipator  
settings at .14 amp for the first stage and .20 amp for second-  
stage heating, except for 008 low heat. Set both first and sec-  
ond stage heat anticipator settings for 008 at .14 amp.  
Table 3 — American/European Wire Conversions  
AMERICAN  
EUROPEAN  
American  
Industry  
Standard  
Size (mm2)  
Industry  
Standard Size  
Conversion  
Size (mm2)  
18 AWG  
16 AWG  
14 AWG  
12 AWG  
10 AWG  
8 AWG  
0.82  
1.30  
1.0  
1.5  
2.08  
2.5  
3.30  
4.0  
6.0  
10.0  
16.0  
25.0  
—
35.0  
50.0  
—
70.0  
95.0  
120.0  
5.25  
6.36  
6 AWG  
13.29  
21.14  
26.65  
33.61  
42.39  
53.49  
67.42  
85.00  
107.19  
4 AWG  
3 AWG  
2 AWG  
1 AWG  
1/0 AWG  
2/0 AWG  
3/0 AWG  
4/0 AWG  
250 kcmil  
300 kcmil  
350 kcmil  
400 kcmil  
500 kcmil  
600 kcmil  
126.64  
151.97  
177.90  
202.63  
253.29  
303.95  
150.0  
—
185.0  
240.0  
300.0  
—
LEGEND  
AWG — American Wire Gage  
kcmil — Thousand Circular Mils  
9
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LEGEND  
C
—
—
Contactor  
IFC  
Indoor (Evaporator)  
Fan Contactor  
NEC  
—
National Electrical Code  
(U.S.A. Standard)  
Splice Connection  
(Factory Supplied)  
Equipment Ground  
Field Wiring  
Factory Wiring  
Fig. 9 — Power Wiring Connections  
INTEGRATED  
GAS UNIT  
CONTROLLER  
(IGC)  
UNIT LOW VOLTAGE  
CONNECTION  
BOARD  
LEGEND  
AHA — Adjustable Heat Anticipator  
CC  
—
Cooling Compensator  
Field Wiring  
Factory Wiring  
Fig. 10 — Low-Voltage Connections  
COMPRESSOR  
NO.1  
COMPRESSOR  
NO. 2  
RACEWAY  
Fig. 11 — Field Control Wiring Raceway  
and Compressor Location  
10  
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9. Remove and save screws currently on sides of hood.  
Insert screens. Secure screens to hood using the screws.  
See Fig. 15.  
Step 8 — Adjust Factory-Installed Options  
APOLLO CONTROL — The optional Apollo control is used  
to actively monitor all modes of operation as well as indoor  
(evaporator) fan status, filter status, and indoor-air quality. The  
Apollo control is designed to work with Carrier TEMP and  
VVT® systems.  
The thermostat must be wired to the Apollo control before  
starting the unit. Refer to the Apollo control installation  
instructions for information on installing the thermostat. See  
Fig. 12 for Apollo location.  
MANUAL OUTDOOR-AIR DAMPER — The outdoor-air  
hood and screen are attached to the basepan at the bottom of  
the unit for shipping.  
Assembly:  
1. Determine quantity of ventilation required for building.  
Record amount for use in Step 8.  
2. Remove and save evaporator coil access panel and  
screws. See Fig. 13.  
3. Separate hood and screen from basepan by removing the  
screws and brackets securing them. Save all screws and  
discard brackets.  
Fig. 13 — Damper Panel with Manual  
Outdoor-Air Damper Installed  
4. Replace evaporator coil access panel using screws from  
Step 2.  
5. Place hood on front of evaporator coil access panel. See  
Fig. 14 for hood details. Secure top of hood with the  
screws removed in Step 3. See Fig. 15.  
6. Remove and save 6 screws (3 on each side) from sides of  
the manual outdoor-air damper. Remove and save 2 man-  
ual outdoor-air adjustment screws (one on each side of  
damper blade).  
7. Align screw holes on hood with screw holes on side of  
manual outdoor-air damper. See Fig. 14 and 15. Secure  
hood with 6 side screws from Step 6.  
8. Adjust minimum position setting of the damper blade by  
adjusting the 2 manual outdoor-air adjustment screws on  
the front of the damper blade. See Fig. 13. Slide blade  
vertically until it is in the appropriate position determined  
by Fig. 16. Tighten screws.  
WIRING TO  
THERMOSTAT  
CONTROL  
WIRING  
APOLLO  
CONTROL  
Fig. 14 — Outdoor-Air Hood Details  
Fig. 12 — Apollo Control Factory-Installed  
in Typical Unit  
Fig. 15 — Damper with Hood Attached  
11  
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c. Install horizontal discharge block-off plate over  
the opening on the access panel. (Block-off plate  
MUST be installed before installing hood assem-  
bly.) See Fig. 22.  
1.0  
250  
200  
0.8  
0.6  
0.4  
7. Insert economizer plug into economizer harness. Remove  
tape from barometric relief damper. See Fig. 20.  
150  
100  
8. If ventilation air is not required, proceed to Step 9. If ven-  
tilation air is required, determine the minimum position  
setting for required airflow. See Fig. 23. Adjust minimum  
position setting by loosening the screws on the position  
setting bracket. See Fig. 24. Slide bracket until the top  
screw is in the position determined by Fig. 23. Tighten  
screws.  
9. Remove tape from outdoor-air thermostat (OAT). Fasten  
OAT to inside of hood using screws and speed clips pro-  
vided. See Fig. 25. Make sure OAT terminals are posi-  
tioned up.  
3" (76 mm)  
1" (25 mm) OPEN  
0.2  
50  
0
0
0
6
8
2
4
10  
12  
OUTDOOR AIRFLOW (cfm x 100)  
100  
200  
300  
400  
500  
OUTDOOR AIRFLOW (L/s)  
10. Replace outdoor-air opening panel using screws from  
Step 2. Replace filter access panel. Ensure the filter ac-  
cess panel slides along the tracks and is securely engaged.  
Fig. 16 — Position Setting  
11. Fasten hood top and side plate assembly to outdoor-air  
opening panel with screws provided.  
12. Place knob supplied with economizer on OAT. See  
Fig. 25. Set OAT for 1.7° C (3° F) below indoor room  
thermostat setting. If accessory enthalpy control (EC) is  
used in place of OAT, see instructions shipped with EC  
for installation and adjustment. See Fig. 25.  
OPTIONAL DURABLADE ECONOMIZER — The option-  
al economizer hood assembly is packaged and shipped in the fil-  
ter section. Damper blades and control boards are installed at the  
factory and the economizer is shipped in the vertical discharge  
position.  
13. Connect OAT per Fig. 26.  
NOTE: Horizontal discharge block-off plate is shipped with  
the air hood package. If unit is to be used for vertical discharge  
application, discard this plate.  
14. Slide outdoor-air inlet screens into screen track on hood  
side plate. While holding screens in place, fasten screen  
retainer to hood using screws provided.  
Assembly  
NOTE: Refer to Fig. 27 for Durablade economizer barometric  
relief damper characteristics.  
1. Determine if ventilation air is required in building. If so,  
determine the minimum amount to be supplied by each  
unit and record quantity of ventilation air needed for use  
in Step 8.  
2. Remove filter access panel by raising panel and swinging  
panel outward. Panel is now disengaged from track and  
can be removed. No tools are required to remove filter ac-  
cess panel. Remove outdoor-air opening panel. Save pan-  
els and screws. See Fig. 17. Remove optional economizer  
and outdoor-air damper hood package from filter section.  
3. Assemble outdoor-air hood top and side plates as shown  
in Fig. 18. Install seal strips on hood top and sides. Put  
aside screen retainer and retainer screw for later assem-  
bly. Do not attach hood to unit at this time.  
4. On 012 and 014 units, install vertical discharge block-off  
plate on right side over return air duct opening. See  
Fig. 19.  
5. a. Slide economizer into unit and secure with screws.  
See Fig. 20.  
NOTE: Be sure to engage rear economizer flange under tabs at  
rear of vertical return-air opening.  
b. Remove screw and discard from barometric relief  
damper. See Fig. 20.  
6. To convert to horizontal discharge application:  
FILTER ACCESS  
PANEL  
OUTDOOR-AIR  
a. Rotate the economizer 90 degrees until the econo-  
mizer motor faces the condenser section (see  
Fig. 21).  
OPENING PANEL  
Fig. 17 — Access Panel Locations  
b. Rotate the barometric relief damper hinge  
90 degrees. Barometric relief damper should open  
vertically to operate properly.  
12  
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ECONOMIZER  
CONTROL BOARD  
ECONOMIZER  
PLUG  
ECONOMIZER  
MOTOR  
TOP  
SCREW  
SHIPPING  
SCREW  
Fig. 20 — Durablade Economizer Installed in Unit  
ECONOMIZER CONTROL BOARD  
ECONOMIZER MOTOR  
Fig. 18 — Outdoor-Air Hood Details  
POSITION SETTING BRACKET  
Fig. 21 — Horizontal Durablade Economizer  
Installation (90 Degree Rotation)  
Fig. 19 — Vertical Discharge Block-Off Plate  
(48TF012, 014 Units Only)  
BLOCK-OFF PLATE  
Fig. 22 — Horizontal Discharge Block-Off Plate  
13  
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OAT  
(TERMINALS ARE UP)  
Example:  
TOP  
Given —  
Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 25 Pa (0.1 in. wg)  
Outdoor Airflow . . .. . . . . . . . . . . . . . . . . . . . . . . . 520 L/s (1100 cfm)  
Determine —  
Setting = 150 mm (6 in.)  
Fig. 23 — Durablade Economizer Damper Minimum  
UNIT  
Position Setting  
OUTSIDE AIR  
SCREEN  
0
ENTHALPY  
CONTROL  
1
2
3
4
HOOD  
5
6
7
8
9
Fig. 25 — Outdoor-Air Thermostat/  
Enthalpy Control Installation  
Fig. 24 — Durablade Economizer Minimum  
Position Damper Setting  
14  
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ECONOMI$ER  
PLUG  
CONTROLLER  
GEAR-DRIVEN  
DAMPER  
ACTUATOR  
Fig. 26 — Wiring Connections for  
Outdoor-Air Thermostat  
175  
150  
0.70  
0.60  
OUTDOOR AIR  
TEMPERATURE  
SENSOR  
125  
100  
0.50  
0.40  
BAROMETRIC  
RELIEF DAMPERS  
Fig. 28 — EconoMi$er Component Locations  
75  
0.30  
0.20  
0.10  
50  
25  
0
0.00  
200  
100  
400  
600  
CFM  
800  
1000  
1200  
570  
0
200  
300  
L/s  
400  
500  
Fig. 27 — Durablade Economizer Barometric Relief  
Damper Characteristics  
OPTIONAL ECONOMI$ER — See Fig. 28 for EconoMi$er  
component locations.  
1. To remove the existing unit filter access panel, raise the  
panel and swing the bottom outward. The panel is now  
disengaged from the track and can be removed. Remove  
the indoor coil access panel and discard. See Fig. 29.  
FILTER ACCESS  
PANEL  
OUTDOOR-AIR  
OPENING PANEL  
NOTE: If installing an optional Power Exhaust Assembly,  
refer to the EconoMi$er Power Exhaust Installation Instruc-  
tions, then proceed to Step 6. Controller should be mounted in  
vertical position as shown in Fig. 28.  
Fig. 29 — Typical Access Panel Locations  
2. To assemble the hood assembly remove the EconoMi$er  
hood from its packaging. Locate the outdoor air opening  
panel. See Fig. 30.  
OUTDOOR AIR  
OPENING PANEL  
EXHAUST AIR  
HOOD TOP  
3. Install the 19 mm x 19 mm (3/4 x 3/4-in.) seal strip on the  
exhaust air hood top panel. Install the 3 mm x 22 mm  
(1/8 x 7/8-in.) seal strip on the exhaust air hood side panels  
and bottom brackets. Assemble the exhaust air hood to  
the outdoor air opening panel as shown in Fig. 30, using  
the screws provided. Do not attach hood assembly to unit  
at this time.  
SCREEN  
RETAINER  
EXHAUST AIR  
HOOD SIDES  
SEAL STRIP  
7
4. Install the 3 mm x 22 mm (1/8 x /8-in. seal strip on the  
outdoor air hood top and side panels. Assemble the out-  
door air hood to the outdoor air opening panel as shown  
in Fig. 31, using the screws provided. Do not attach com-  
pleted hood (Fig. 32) assembly to the unit at this time.  
EXHAUST AIR SCREEN  
EXHAUST AIR  
BOTTOM BRACKET  
Fig. 30 — Exhaust Air Hood Assembly  
15  
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OUTDOOR AIR  
OPENING  
PANEL  
SEAL STRIP  
OUTDOOR AIR  
HOOD TOP  
BLOWER  
FILTER  
SCREEN  
RETAINER  
OUTDOOR AIR  
INLET  
SCREENS  
INSTALL  
SEAL STRIP  
RETURN AIR  
BLOCK-OFF  
PLATE  
ASSEMBLED  
EXHAUST HOOD  
OUTDOOR AIR  
HOOD SIDES  
Fig. 31 — Outdoor Air Hood Assembly  
REMOVE FACTORY INSTALLED  
BLOCK-OFF PLATE  
(008 AND 012 UNITS ONLY)  
Fig. 33 — Return Air Block-Off Plate Installation  
(48TF014 Units Only)  
ECONOMIZER CLIP  
HVAC UNIT  
UNIT FILTER  
RACK  
ECONOMIZER  
UNIT BASE  
Fig. 32 — Completed Hood Assembly  
ECONOMIZER REAR  
FLANGE  
Fig. 34 — Rear EconoMi$er Flange Installation  
5. Slide the outdoor air inlet screens into the screen track on  
the hood side panels. While holding the screens in place,  
fasten the screen retainer to the hood using the screws  
provided. Repeat the process for the barometric exhaust  
air screen. Do not attach hood assembly to unit at this  
time.  
6. For 48TF014 units, install the return air block-off plate  
over the return air duct opening. See Fig. 33.  
WIRING HARNESS  
NOTE: For 48TF008 and 012 units, remove the factory-  
installed block-off plate. See Fig. 33.  
7. Slide the EconoMi$er assembly into the rooftop unit. See  
Fig. 34 and 35.  
OUTDOOR AIR  
BLOCK-OFF PLATE  
NOTE: Be sure to engage rear EconoMi$er flange under tabs in  
return air opening of the unit base. See Fig. 34.  
8. Install the outdoor air block-off plate, then secure the  
EconoMi$er with the screws provided. See Fig. 35.  
9. Remove and store the 12-pin jumper plug from the unit  
wiring harness located in the upper left corner and insert  
the EconoMi$er plug into the unit wiring harness. Refer  
to wiring diagram Fig. 36 and 37. Also refer to Fig. 38 if  
installing an accessory power exhaust.  
Fig. 35 — EconoMi$er Installed in  
48TF008 and 012 Units  
10. Install the complete hood assembly on the unit and secure  
using the screws provided.  
11. Remove the indoor fan motor access panel.  
12. Mount the supply air temperature sensor to the lower left  
portion of the indoor blower housing with the two (2)  
screws provided (see Fig. 39). Connect the violet and  
pink wires to the corresponding connections on the sup-  
ply air temperature sensor. Replace the indoor fan motor  
access panel.  
16  
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LEGEND  
OAT  
—
Outdoor-Air Thermostat  
Fig. 36 — EconoMi$er Wiring  
ECONOMI$ER  
CONTROLLER  
BROWN  
TEMP  
VIOLET  
TEMP  
OUTDOOR  
AIR  
OAT  
COM  
OAH  
+15 V  
RAT  
COM  
OUT  
PWR  
SENSOR  
WHITE  
RED  
BROWN  
TEMP  
VIOLET  
WHITE  
RETURN  
AIR  
SENSOR  
TEMP  
COM  
OUT  
COM  
RAH  
RED  
+15 V  
PWR  
CO2  
V+  
SENSOR  
24  
(+)  
CO2  
CO2 COM  
COM VAC  
DAT  
COM  
REM POT  
COM  
SUPPLY AIR  
TEMPERATURE SENSOR  
PINK  
TEMP  
TEMP  
LED  
COM  
VIOLET  
Fig. 37 — EconoMi$er Sensor Wiring  
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TO FUSED  
DISCONNECT  
RED YEL BLU  
GRAY  
H4  
H1  
H3  
H2  
X2 X3  
X4  
X1  
FIELD SUPPLIED  
WIRING  
SECONDARY  
230VAC  
BLACK  
BLACK  
LT. BLUE  
B
A
3
2
1
9
8
7
6
5
4
BLACK  
BROWN  
FAN 1  
R1  
24 VAC  
3-PIN  
CONNECTOR  
PLUG  
C1  
GREEN/  
YELLOW  
4-PIN  
CONNECTOR  
PLUG  
2 x 4 IN.  
HANDY BOX  
BLUE  
ORANGE  
1
YELLOW  
2
L1  
L2  
BLACK L1  
1
2
3
4
1
2
BLUE  
L2  
BROWN  
3
GREEN GND  
GND  
BLACK  
BLUE  
3
4
BLACK  
LT. BLUE  
230 VAC  
1 PHASE  
GREEN  
B
A
3
2
1
9
8
7
6
5
BLACK  
R2  
24 VAC  
BROWN  
C1  
FAN 2  
GREEN/  
YELLOW  
4
BLUE  
Fig. 38 — Wiring Diagram for Power Exhaust System  
SUPPLY AIR  
TEMPERATURE  
SENSOR  
MOUNTING  
LOCATION  
SUPPLY AIR  
TEMPERATURE  
SENSOR  
Fig. 39 — Supply Air Sensor Placement  
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CO2 Control Set Up — If a CO2 sensor is not being used, pro-  
ceed to the next section. If a CO2 sensor is being used, perform  
the following:  
4. Calculate the minimum airflow across the EconoMi$er.  
a. Calculate % of outside air using the following  
formula.  
1. Determine the value at which you want the minimum  
position of the dampers to begin opening to allow a great-  
er amount of outdoor air to enter. The range is 800 to  
1,400 ppm.  
% Outdoor air through EconoMi$er  
Mixture Temp – Return Air Temp  
% Outdoor air =  
Outdoor Temp – Return Air Temp  
2. Locate the CO2 SP (PPM) potentiometer and adjust to the  
desired set point. See Fig. 40.  
b. Multiply total CFM by percentage outdoor air, this  
gives outdoor air volume in CFM.  
Mechanical Cooling Lockout — Determine the outdoor-air  
temperature at which you want the mechanical cooling (com-  
pressors) to be disabled. Locate the mechanical cooling lockout  
(MECH CLG LOCKOUT) potentiometer. To disable this fea-  
ture, turn the potentiometer counterclockwise (CCW) to the  
OFF position. Otherwise, set the value between –12 and 15 C  
(10 and 60 F). Mechanical cooling will not operate when the  
outdoor air temperature is below this value. See Fig. 40.  
Dry Bulb Changeover Set Up — Determine the dry bulb  
changeover set point from Table 4. The settings are A, B, C and  
D. Locate the ECON SP potentiometer and set the dry bulb  
changeover set point. See Fig. 40. When the OAT is above this  
set point, the damper is limited to minimum position setting.  
5. Turn on base unit power.  
NOTE: The EconoMi$er begins operation three min-  
utes after power up.  
Personal Injury Hazard. Avoid possible injury by keep-  
ing fingers away from damper blades.  
6. See Fig. 41 for barometric relief damper characteristics.  
Table 4 — Changeover Set Points  
SETTINGS  
Dry Bulb C (°F)  
A
23  
B
21  
C
19  
D
17  
(73) (69) (66) (63)  
63  
58  
56  
51  
Single Enthalpy* KJ/Kg (Btu/lb)  
(27) (25) (24) (22)  
Differential Temperature* C  
1.1  
(2)  
2
(1)  
1.1  
(2)  
2
(1)  
1.1  
(2)  
2
(1)  
1.1  
(2)  
2
(1)  
(°F, Not Adjustable)  
Fig. 40 — EconoMi$er Control Adjustment  
Differential Enthalpy* KJ/Kg  
(Btu/lb, Not Adjustable)  
Potentiometers (Factory Settings)  
*Field-installed accessory.  
If a potentiometer fails, its setting will default to the values  
in Table 5.  
125  
0.5  
100  
0.4  
Table 5 — Default Potentiometer Settings  
75  
POTENTIOMETER  
CO2 SP (PPM)  
MECH CLG LOCKOUT, C (F)  
ECON SP  
DEFAULT SETTING  
0.3  
1,000  
8.3 (47)  
D
50  
0.2  
25  
0.1  
MIN POS (%)  
20  
0
Ventilation Air (Minimum Position Set Up) — If ventilation  
air is not required, proceed to Step 5. If ventilation air is re-  
quired, perform the following:  
1. The indoor fan must be on to set the ventilation air. Either  
put the thermostat in the continuous fan mode or jumper  
the R and G terminals at the rooftop unit connection  
board.  
0
800  
1200 1600 2000 2400  
0
0
400  
200  
FLOW (CUBIC FEET/MINUTE)  
600 800  
1000 1200  
400  
FLOW (L/s)  
Fig. 41 — EconoMi$er Barometric Relief Capacity  
2. Locate the minimum position (MIN POS) potentiometer.  
Turn the potentiometer full CCW to fully close the out-  
door air dampers. Turn the potentiometer gradually  
clockwise (CW) to the desired position. See Fig. 40.  
3. Replace the filter access panel. See Fig. 21. Ensure the fil-  
ter access panel slides along the tracks and is securely  
engaged.  
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Step 9 — Adjust Evaporator-Fan Speed — Ad-  
just evaporator-fan speed to meet jobsite requirement.  
Table 6 shows motor performance. Tables 7 and 8 show fan  
rpm at motor pulley settings, Table 9 shows motor efficiencies  
and Tables 10 and 11 give accessory static pressure drops. Re-  
fer to Tables 12-23 to determine fan speed settings. Fan motor  
pulleys are factory set for speed shown in Table 1A or 1B.  
To change fan speed:  
1. Shut off unit power supply and install lockout tag.  
2. Loosen belt by loosening fan motor mounting plate nuts  
(see Fig. 42 and 43).  
MOTOR MOUNTING  
PLATE NUTS  
3. Loosen movable pulley flange setscrew (see Fig. 44).  
4. Screw movable flange toward fixed flange to increase fan  
speed and away from fixed flange to decrease fan speed.  
Increasing fan speed increases load on motor. Do not ex-  
ceed maximum speed specified in Table 1A or 1B.  
Fig. 42 — Typical Belt-Drive Motor Mounting  
for Size 008  
5. Set movable flange at nearest flat of pulley hub and tight-  
en setscrew (see Table 1A or 1B for speed change for  
each full turn of pulley flange).  
To align fan and motor pulleys:  
1. Loosen fan pulley setscrews.  
2. Slide fan pulley along fan shaft.  
3. Make angular alignment by loosening motor from  
mounting plate.  
To adjust belt tension (see Fig. 42 and 43):  
1. Loosen fan motor mounting nuts.  
2. Size 008 — Slide motor mounting plate away from fan  
scroll for proper belt tension (13 mm [1/2-in.] deflection  
with 3.6 to 4.5 kg [8 to 10 lbs] of force) and tighten  
mounting nuts. See Fig. 42.  
Fig. 43 — Typical Belt-Drive Motor Mounting  
Sizes 012,014 — Slide motor mounting plate downward  
to tighten belt tension (13 mm [1/2-in.] deflection with 2.3  
to 4.5 kg [5 to 10 lbs] of force) and tighten mounting nuts.  
See Fig. 43.  
for Sizes 012,014  
3. Adjust bolt and nut on mounting plate to secure motor in  
fixed position. See Fig. 44.  
Realign fan and motor pulleys:  
1. Loosen fan pulley setscrews.  
2. Slide fan pulley along fan shaft.  
3. Make angular alignment by loosening motor from  
mounting plate.  
Fig. 44 — Evaporator-Fan Pulley Adjustment  
Table 6 — Evaporator-Fan Motor Performance  
MAXIMUM ACCEPTABLE  
CONTINUOUS  
BkW*  
MAXIMUM ACCEPTABLE  
MAXIMUM ACCEPTABLE  
OPERATING  
UNIT  
48TF  
UNIT RATED  
VOLTAGE  
MAXIMUM  
AMP DRAW  
CONTINUOUS  
BHP*  
WATTS  
008  
012  
014  
400  
400  
400  
2.76  
2.76  
2.76  
2.90  
3.70  
3.70  
2615  
3313  
3313  
3.6  
5.0  
5.0  
LEGEND  
BHP — Brake Horsepower  
BkW — kW x Motor Efficiency  
*Extensive motor and electrical testing on these units ensures that  
the full range of the motors can be utilized with confidence. Using  
your fan motors up to the ratings shown in this table will not result in  
nuisance tripping or premature motor failure. Unit warranty will not  
be affected.  
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Table 7 — Fan R/s at Motor Pulley Settings (SI)  
MOTOR PULLEY TURNS OPEN  
UNIT  
48TF  
1
0
/
1
11/2  
2
21/2  
3
31/2  
9.25  
4
41/2  
8.55  
9.85  
12.30  
5
2
11.70  
13.00  
15.00  
11.35  
12.65  
14.70  
11.00  
12.30  
14.40  
10.65  
11.95  
14.10  
10.30  
11.60  
13.80  
9.95  
9.60  
10.90  
13.20  
8.90  
10.20  
12.60  
8.20  
9.50  
12.00  
008  
012  
014  
11.25  
13.50  
10.55  
12.90  
Table 8 — Fan Rpm at Motor Pulley Settings (English)  
MOTOR PULLEY TURNS OPEN  
UNIT  
48TF  
1
0
/
1
11/2  
639  
718  
843  
2
21/2  
597  
676  
807  
3
31/2  
555  
634  
771  
4
41/2  
513  
592  
735  
5
2
700  
779  
900  
681  
760  
883  
660  
739  
865  
618  
697  
825  
576  
655  
789  
534  
613  
753  
492  
571  
717  
008  
012  
014  
Table 9 — Evaporator-Fan Motor Efficiency  
MOTOR  
48TF  
EFFICIENCY (%)  
D/E/F008  
D/E/F012  
D/E014  
80  
80  
85  
NOTE: Convert watts to bhp using the following formula:  
watts input x motor efficiency  
bhp =  
746  
Table 10 — Accessory/FIOP Static Pressure Drop (Pa) — 48TF008-014  
DURABLADE ECONOMIZER  
UNIT 48TF  
008-014  
RATED VOLTAGE  
L/s  
ECONOMI$ER  
PRESSURE DROP  
1100  
1200  
1300  
1400  
1500  
1600  
1700  
1800  
1900  
2000  
2100  
2200  
2300  
5
6
—
—
—
31  
35  
41  
50  
59  
67  
75  
84  
90  
97  
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
All  
FIOP — Factory-Installed Option  
Table 11 — Accessory/FIOP Static Pressure Drop (in. wg) — 48TF008-014  
DURABLADE ECONOMIZER  
UNIT 48TF  
008-014  
RATED VOLTAGE  
CFM  
ECONOMI$ER  
PRESSURE DROP  
2200  
2500  
3000  
3500  
4000  
4500  
5000  
5500  
6000  
.02  
.02  
.03  
.04  
.05  
.06  
.07  
.08  
.09  
.07  
.09  
.13  
.18  
.23  
.30  
.36  
—
All  
—
FIOP — Factory-Installed Option  
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Table 12 — Fan Performance, 48TF008 — Vertical Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1150  
1200  
1275  
1300  
1400  
1450  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
8.8  
9.0  
9.3  
9.6  
9.9  
10.1  
10.4  
10.7  
11.0  
11.3  
11.5  
11.8  
12.2  
12.4  
12.8  
0.45  
0.47  
0.53  
0.58  
0.63  
0.68  
0.78  
0.81  
0.90  
0.99  
1.06  
1.16  
1.24  
1.35  
1.47  
10.1  
10.3  
10.5  
10.8  
11.1  
11.3  
11.5  
11.8  
12.0  
12.4  
12.6  
12.9  
13.2  
13.4  
13.7  
0.62  
0.65  
0.70  
0.78  
0.85  
0.86  
0.96  
1.06  
1.10  
1.22  
1.30  
1.38  
1.49  
1.60  
1.70  
11.2  
11.4  
11.6  
11.9  
12.1  
12.3  
12.6  
12.8  
13.0  
13.3  
13.6  
13.8  
14.1  
14.4  
14.6  
0.79  
0.82  
0.89  
0.96  
1.02  
1.09  
1.18  
1.25  
1.35  
1.43  
1.54  
1.65  
1.75  
1.84  
1.97  
12.2  
12.4  
12.6  
12.8  
13.1  
13.2  
13.5  
13.7  
14.0  
14.2  
14.4  
14.7  
14.9  
15.1  
15.4  
0.96  
1.02  
1.08  
1.17  
1.26  
1.29  
1.38  
1.48  
1.56  
1.67  
1.78  
1.88  
2.00  
2.10  
2.24  
EXTERNAL STATIC PRESSURE (Pa)  
300 350  
AIRFLOW  
(L/s)  
250  
400  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1150  
1200  
1275  
1300  
1400  
1450  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
13.2  
13.3  
13.5  
13.8  
14.0  
14.1  
14.4  
14.5  
14.8  
15.0  
15.2  
15.5  
15.7  
15.9  
16.2  
1.15  
1.21  
1.28  
1.37  
1.45  
1.53  
1.61  
1.72  
1.80  
1.92  
2.01  
2.14  
2.24  
2.37  
2.51  
14.1  
14.1  
14.3  
14.6  
14.7  
14.9  
15.2  
15.4  
15.6  
15.8  
16.0  
16.2  
16.4  
16.7  
16.9  
1.39  
1.41  
1.46  
1.55  
1.65  
1.73  
1.84  
1.95  
2.07  
2.15  
2.27  
2.41  
2.52  
2.66  
2.78  
15.1  
15.2  
15.3  
15.2  
15.5  
15.6  
15.8  
16.1  
16.3  
16.6  
16.7  
16.9  
17.2  
17.4  
—
1.73  
1.76  
1.76  
1.72  
1.84  
1.88  
2.04  
2.15  
2.29  
2.42  
2.56  
2.65  
2.82  
2.92  
—
15.8  
15.9  
16.1  
16.3  
16.5  
16.7  
16.4  
16.5  
17.0  
17.2  
17.5  
17.6  
—
1.96  
2.00  
2.17  
2.17  
2.10  
2.10  
2.18  
2.34  
2.49  
2.66  
2.80  
2.92  
—
—
—
—
—
LEGEND  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
5. Standard drive range is 8.2 to 11.7 r/s. All other speeds require  
a field-supplied drive.  
—
6. Maximum continuous BkW is 1.79. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
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Table 13 — Fan Performance, 48TF012 — Vertical Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
250  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2250  
2300  
2400  
2450  
9.8  
10.0  
10.3  
10.6  
10.9  
11.1  
11.4  
11.7  
12.0  
12.2  
12.5  
12.8  
13.1  
13.3  
13.6  
13.9  
14.2  
14.5  
14.8  
0.55  
0.60  
0.66  
0.72  
0.78  
0.86  
0.93  
1.00  
1.08  
1.16  
1.25  
1.34  
1.44  
1.53  
1.64  
1.75  
1.86  
1.98  
2.10  
10.9  
11.2  
11.4  
11.7  
12.0  
12.2  
12.5  
12.7  
12.9  
13.2  
13.4  
13.7  
13.9  
14.2  
14.5  
14.7  
15.0  
15.3  
15.6  
0.67  
0.74  
0.80  
0.86  
0.93  
1.00  
1.08  
1.15  
1.23  
1.31  
1.40  
1.50  
1.60  
1.71  
1.82  
1.94  
2.06  
2.19  
2.32  
12.0  
12.2  
12.4  
12.6  
12.8  
13.1  
13.3  
13.6  
13.8  
14.1  
14.3  
14.6  
14.9  
15.1  
15.3  
15.6  
15.8  
16.1  
—
0.79  
0.86  
0.92  
0.98  
1.06  
1.14  
1.22  
1.31  
1.40  
1.49  
1.59  
1.69  
1.80  
1.91  
2.02  
2.13  
2.25  
2.38  
—
12.9  
13.1  
13.3  
13.6  
13.7  
14.0  
14.2  
14.4  
14.6  
14.8  
15.1  
15.3  
15.6  
15.8  
16.1  
16.3  
16.6  
—
0.92  
0.98  
1.05  
1.12  
1.20  
1.28  
1.36  
1.44  
1.53  
1.63  
1.74  
1.85  
1.97  
2.09  
2.21  
2.34  
2.47  
—
13.8  
13.9  
14.2  
14.4  
14.6  
14.8  
15.0  
15.2  
15.4  
15.6  
15.9  
16.1  
16.3  
16.5  
16.8  
—
1.04  
1.11  
1.18  
1.25  
1.34  
1.42  
1.52  
1.60  
1.70  
1.79  
1.90  
2.00  
2.12  
2.24  
2.37  
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (Pa)  
400  
AIRFLOW  
(L/s)  
300  
450  
350  
500  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2250  
2300  
2400  
2450  
14.6  
14.8  
15.0  
15.1  
15.3  
15.5  
15.8  
16.0  
16.2  
16.4  
16.6  
16.8  
17.0  
17.2  
—
1.15  
1.23  
1.30  
1.39  
1.47  
1.56  
1.66  
1.75  
1.86  
1.96  
2.07  
2.18  
2.30  
2.41  
—
15.3  
15.5  
15.7  
15.9  
16.1  
16.3  
16.4  
16.6  
16.9  
17.1  
17.3  
17.5  
—
—
—
—
—
—
—
1.26  
1.35  
1.44  
1.52  
1.61  
1.70  
1.80  
1.90  
2.01  
2.12  
2.24  
2.36  
—
—
—
—
—
—
—
16.1  
16.2  
16.4  
16.6  
16.8  
17.0  
17.2  
17.3  
17.5  
17.7  
17.9  
—
—
—
—
—
—
—
—
1.38  
1.47  
1.55  
1.65  
1.74  
1.85  
1.95  
2.05  
2.16  
2.26  
2.39  
—
—
—
—
—
—
—
—
16.9  
17.1  
17.1  
17.3  
17.4  
17.6  
17.8  
18.0  
18.2  
18.4  
—
—
—
—
—
—
—
—
—
1.45  
1.60  
1.68  
1.77  
1.88  
1.98  
2.09  
2.20  
2.31  
2.43  
—
—
—
—
—
—
—
—
—
17.7  
17.8  
17.9  
18.0  
18.1  
18.2  
18.4  
18.6  
—
—
—
—
—
—
—
—
—
—
—
1.68  
1.81  
1.86  
1.91  
2.00  
2.11  
2.22  
2.34  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 9.5 to 13.0 r/s. All other speeds require  
a field-supplied drive.  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
6. Maximum continuous BkW is 1.79. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
—
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 14 — Fan Performance, 48TF014 — Vertical Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
250  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1900  
1950  
2000  
2050  
2100  
2150  
2250  
2300  
2350  
2400  
2450  
2500  
2550  
2600  
2650  
2700  
2750  
2800  
2850  
2900  
2950  
3000  
3050  
3100  
12.5  
12.7  
13.0  
13.3  
13.6  
13.9  
14.2  
14.5  
14.8  
15.0  
15.4  
15.7  
15.9  
16.2  
16.5  
16.8  
17.1  
17.4  
17.7  
18.0  
18.3  
18.6  
18.9  
19.2  
1.10  
1.18  
1.27  
1.36  
1.46  
1.56  
1.67  
1.78  
1.89  
2.01  
2.16  
2.28  
2.43  
2.58  
2.72  
2.89  
3.05  
3.21  
3.40  
3.57  
3.76  
3.96  
4.15  
4.38  
13.5  
13.7  
14.0  
14.3  
14.5  
14.8  
15.1  
15.4  
15.7  
15.9  
16.2  
16.5  
16.8  
17.1  
17.3  
17.6  
17.9  
18.2  
18.5  
18.8  
19.1  
19.4  
19.6  
—
1.27  
1.36  
1.46  
1.56  
1.66  
1.78  
1.89  
2.00  
2.13  
2.25  
2.38  
2.52  
2.65  
2.81  
2.95  
3.12  
3.28  
3.45  
3.64  
3.81  
4.02  
4.21  
4.40  
—
14.4  
14.6  
14.9  
15.1  
15.4  
15.7  
15.9  
16.2  
16.4  
16.7  
17.0  
17.3  
17.5  
17.8  
18.1  
18.4  
18.7  
18.9  
19.2  
19.5  
19.8  
20.1  
—
1.42  
1.52  
1.62  
1.72  
1.84  
1.95  
2.07  
2.19  
2.32  
2.46  
2.60  
2.75  
2.90  
3.05  
3.22  
3.39  
3.56  
3.74  
3.93  
4.11  
4.29  
4.51  
—
15.3  
15.5  
15.7  
16.0  
16.2  
16.5  
16.7  
17.0  
17.2  
17.5  
17.7  
18.0  
18.2  
18.5  
18.8  
19.0  
19.3  
19.6  
19.9  
20.2  
—
1.63  
1.73  
1.81  
1.91  
2.01  
2.13  
2.24  
2.37  
2.51  
2.64  
2.79  
2.95  
3.10  
3.26  
3.43  
3.60  
3.80  
3.98  
4.18  
4.37  
—
16.1  
16.4  
16.6  
16.8  
17.0  
17.3  
17.5  
17.7  
18.0  
18.2  
18.5  
18.7  
18.0  
19.2  
19.4  
19.7  
20.0  
20.2  
20.5  
—
1.81  
1.92  
2.02  
2.14  
2.25  
2.37  
2.48  
2.60  
2.72  
2.85  
2.99  
3.13  
3.29  
3.47  
3.64  
3.83  
4.01  
4.19  
4.41  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (Pa)  
400  
AIRFLOW  
(L/s)  
300  
450  
350  
500  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1900  
1950  
2000  
2050  
2100  
2150  
2250  
2300  
2350  
2400  
2450  
2500  
2550  
2600  
2650  
2700  
2750  
2800  
2850  
2900  
2950  
3000  
3050  
3100  
17.0  
17.2  
17.4  
17.6  
17.8  
18.0  
18.2  
18.5  
18.7  
18.9  
19.2  
19.4  
19.6  
19.9  
20.1  
20.4  
20.6  
20.9  
—
2.00  
2.11  
2.22  
2.33  
2.45  
2.59  
2.71  
2.85  
2.99  
3.12  
3.27  
3.38  
3.54  
3.69  
3.86  
4.03  
4.21  
4.40  
—
17.9  
18.0  
18.2  
18.4  
18.6  
18.8  
19.0  
19.2  
19.4  
19.6  
19.8  
20.1  
20.3  
20.5  
20.8  
21.0  
—
—
—
—
—
—
—
—
2.21  
2.31  
2.43  
2.54  
2.66  
2.79  
2.93  
3.05  
3.21  
3.36  
3.53  
3.67  
3.83  
4.01  
4.16  
4.32  
—
—
—
—
—
—
—
—
18.7  
18.8  
19.0  
19.2  
19.3  
19.5  
19.7  
19.9  
20.1  
20.3  
20.5  
20.7  
21.0  
21.2  
21.4  
—
—
—
—
—
—
—
—
—
2.39  
2.51  
2.63  
2.76  
2.89  
3.01  
3.15  
3.29  
3.43  
3.59  
3.74  
3.93  
4.09  
4.27  
4.44  
—
—
—
—
—
—
—
—
—
19.4  
19.6  
19.8  
19.9  
20.1  
20.3  
20.4  
20.6  
20.8  
21.0  
21.2  
21.4  
21.6  
—
—
—
—
—
—
—
—
—
2.58  
2.71  
2.84  
2.97  
3.10  
3.24  
3.37  
3.52  
3.67  
3.82  
3.99  
4.15  
4.33  
—
—
—
—
—
—
—
—
—
20.1  
20.3  
20.5  
20.7  
20.8  
21.0  
21.2  
21.3  
21.5  
21.7  
—
—
—
—
—
—
—
—
—
2.74  
2.88  
3.02  
3.17  
3.32  
3.46  
3.60  
3.76  
3.92  
4.08  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 12.0 to 15.0 r/s. All other speeds  
require a field-supplied drive.  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
6. Maximum continuous BkW is 2.76. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
—
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 15 — Fan Performance, 48TF008 — Horizontal Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
225  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1075  
1125  
1150  
1200  
1250  
1300  
1400  
1450  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
8.1  
8.4  
8.6  
8.9  
9.1  
9.4  
9.7  
10.0  
10.2  
10.5  
10.8  
11.1  
11.4  
11.7  
12.0  
12.2  
12.5  
0.34  
0.39  
0.42  
0.46  
0.51  
0.56  
0.62  
0.67  
0.74  
0.80  
0.88  
0.97  
1.04  
1.12  
1.23  
1.33  
1.42  
9.5  
9.7  
9.9  
0.49  
0.53  
0.58  
0.64  
0.70  
0.75  
0.82  
0.88  
0.94  
1.02  
1.09  
1.17  
1.25  
1.35  
1.45  
1.54  
1.65  
10.7  
10.9  
11.1  
11.3  
11.5  
11.7  
12.0  
12.2  
12.4  
12.7  
12.9  
13.2  
13.4  
13.7  
13.9  
14.2  
14.4  
0.66  
0.71  
0.76  
0.81  
0.87  
0.93  
0.99  
1.07  
1.15  
1.23  
1.32  
1.41  
1.51  
1.61  
1.70  
1.81  
1.92  
11.8  
12.0  
12.2  
12.4  
12.6  
12.7  
12.9  
13.2  
13.4  
13.6  
13.8  
14.0  
14.3  
14.5  
14.8  
15.0  
15.2  
0.81  
0.89  
0.96  
1.02  
1.08  
1.14  
1.22  
1.27  
1.36  
1.44  
1.53  
1.63  
1.73  
1.85  
1.95  
2.08  
2.20  
12.4  
12.5  
12.7  
12.8  
13.0  
13.2  
13.4  
13.6  
13.8  
14.0  
14.2  
14.4  
14.7  
14.9  
15.1  
15.4  
15.6  
0.92  
0.98  
1.05  
1.11  
1.19  
1.25  
1.33  
1.40  
1.48  
1.56  
1.65  
1.75  
1.85  
1.97  
2.07  
2.20  
2.34  
10.2  
10.4  
10.7  
10.9  
11.2  
11.4  
11.7  
11.9  
12.2  
12.4  
12.7  
13.0  
13.2  
13.5  
EXTERNAL STATIC PRESSURE (Pa)  
300 350  
AIRFLOW  
(L/s)  
250  
400  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1075  
1125  
1150  
1200  
1250  
1300  
1400  
1450  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
12.9  
13.0  
13.1  
13.3  
13.5  
13.7  
13.9  
14.1  
14.3  
14.2  
14.8  
14.9  
15.1  
15.3  
15.5  
15.8  
16.0  
1.03  
1.08  
1.13  
1.21  
1.29  
1.37  
1.44  
1.52  
1.60  
1.68  
1.77  
1.86  
1.97  
2.08  
2.20  
2.32  
2.46  
13.9  
14.0  
14.1  
14.3  
14.4  
14.5  
14.7  
14.9  
15.1  
15.3  
15.5  
15.7  
15.9  
16.1  
16.3  
16.5  
16.7  
1.29  
1.34  
1.38  
1.42  
1.48  
1.56  
1.66  
1.77  
1.86  
1.94  
2.04  
2.13  
2.24  
2.35  
2.45  
2.58  
2.70  
15.0  
15.1  
15.2  
15.2  
15.3  
15.4  
15.5  
15.7  
15.9  
16.1  
16.3  
16.5  
16.6  
16.3  
17.0  
17.2  
17.5  
1.60  
1.68  
1.69  
1.74  
1.78  
1.81  
1.84  
1.97  
2.08  
2.21  
2.31  
2.42  
2.52  
2.64  
2.76  
2.87  
2.99  
15.7  
15.9  
16.0  
16.0  
16.2  
16.3  
16.4  
16.5  
16.6  
16.8  
17.0  
17.2  
17.4  
17.6  
17.7  
17.9  
18.1  
1.89  
1.92  
1.96  
2.01  
2.06  
2.09  
2.19  
2.18  
2.29  
2.43  
2.55  
2.70  
2.82  
2.94  
3.05  
3.19  
3.31  
LEGEND  
5. Standard drive range is 8.2 to 11.7 r/s. All other speeds require  
a field-supplied drive.  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
6. Maximum continuous BkW is 1.79. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
—
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 16 — Fan Performance, 48TF012 — Horizontal Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
250  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2300  
2350  
2400  
2500  
9.1  
9.4  
9.6  
0.49  
0.54  
0.59  
0.65  
0.71  
0.77  
0.84  
0.92  
1.00  
1.09  
1.18  
1.28  
1.38  
1.49  
1.61  
1.74  
1.86  
2.00  
—
10.5  
10.7  
10.9  
11.1  
11.3  
11.5  
11.7  
11.9  
12.1  
12.3  
12.6  
12.8  
13.0  
13.2  
13.4  
13.7  
13.9  
14.2  
14.4  
0.63  
0.68  
0.73  
0.80  
0.86  
0.92  
0.98  
1.04  
1.14  
1.22  
1.31  
1.40  
1.50  
1.60  
1.70  
1.81  
1.93  
2.05  
2.14  
11.6  
11.8  
12.0  
12.2  
12.4  
12.6  
12.8  
13.0  
13.2  
13.4  
13.6  
13.8  
14.0  
14.2  
14.4  
14.6  
14.8  
15.0  
15.2  
0.77  
0.82  
0.88  
0.95  
1.01  
1.07  
1.14  
1.21  
1.29  
1.38  
1.47  
1.56  
1.64  
1.73  
1.83  
1.93  
2.03  
2.14  
2.25  
12.6  
12.8  
13.0  
13.2  
13.4  
13.5  
13.7  
13.9  
14.1  
14.3  
14.5  
14.7  
14.9  
15.1  
15.3  
15.5  
15.7  
—
0.89  
0.96  
1.02  
1.09  
1.16  
1.23  
1.30  
1.39  
1.47  
1.55  
1.65  
1.73  
1.82  
1.93  
2.04  
2.15  
2.27  
—
13.5  
13.7  
13.9  
14.1  
14.2  
14.4  
14.6  
14.8  
15.0  
15.2  
15.3  
15.5  
15.8  
15.9  
16.1  
—
0.99  
1.06  
1.14  
1.22  
3.10  
1.38  
1.47  
1.55  
1.64  
1.72  
1.82  
1.92  
2.02  
2.13  
2.24  
—
9.8  
10.1  
10.3  
10.6  
10.8  
11.1  
11.3  
11.6  
11.9  
12.1  
12.4  
12.7  
12.9  
13.2  
13.5  
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (Pa)  
400  
AIRFLOW  
(L/s)  
300  
450  
350  
500  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1500  
1550  
1600  
1650  
1700  
1750  
1800  
1850  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2300  
2350  
2400  
2500  
14.5  
14.6  
14.8  
14.9  
15.0  
15.2  
15.4  
15.6  
15.8  
16.0  
16.2  
16.3  
16.5  
16.7  
16.9  
—
1.13  
1.20  
1.26  
1.33  
1.42  
1.51  
1.61  
1.71  
1.80  
1.91  
2.01  
2.10  
2.21  
2.32  
2.43  
—
15.2  
15.4  
15.6  
15.7  
15.9  
16.0  
16.2  
16.3  
16.5  
16.7  
16.9  
17.1  
—
—
—
—
—
—
—
1.22  
1.30  
1.40  
1.48  
1.56  
1.64  
1.73  
1.84  
1.94  
2.06  
2.17  
2.29  
—
—
—
—
—
—
—
16.1  
16.2  
16.3  
16.5  
16.7  
16.8  
17.0  
17.1  
17.2  
17.4  
17.6  
—
—
—
—
—
—
—
—
1.40  
1.43  
1.50  
1.60  
1.70  
1.79  
1.89  
1.98  
2.07  
2.19  
2.31  
—
—
—
—
—
—
—
—
16.8  
16.9  
17.1  
17.2  
17.3  
17.5  
17.7  
17.8  
18.0  
—
—
—
—
—
1.54  
1.60  
1.68  
1.72  
1.81  
1.91  
2.03  
2.15  
2.24  
—
—
—
—
—
17.7  
17.8  
17.9  
18.0  
18.0  
18.2  
18.3  
18.5  
18.7  
—
—
—
—
—
1.82  
1.86  
1.91  
1.97  
1.97  
2.04  
2.15  
2.27  
2.40  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
5. Standard drive range is 9.5 to 13.0 r/s. All other speeds require  
a field-supplied drive.  
6. Maximum continuous BkW is 1.79. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
—
26  
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Table 17 — Fan Performance, 48TF014 — Horizontal Discharge Units (SI)  
EXTERNAL STATIC PRESSURE (Pa)  
AIRFLOW  
(L/s)  
50  
200  
100  
150  
225  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2250  
2325  
2400  
2450  
2500  
2550  
2600  
2650  
2700  
2750  
2800  
2850  
2900  
2950  
3000  
3050  
3100  
11.5  
11.8  
12.1  
12.3  
12.6  
12.8  
13.1  
13.3  
13.6  
13.9  
14.1  
14.4  
14.7  
14.9  
15.2  
15.4  
15.7  
15.9  
16.2  
16.5  
16.7  
17.0  
17.3  
17.5  
0.96  
1.04  
1.12  
1.18  
1.27  
1.36  
1.44  
1.53  
1.63  
1.74  
1.84  
1.95  
2.07  
2.18  
2.32  
2.44  
2.57  
2.71  
2.86  
2.98  
3.11  
3.25  
3.38  
3.52  
12.7  
12.9  
13.2  
13.4  
13.6  
13.9  
14.1  
14.4  
14.6  
14.9  
15.1  
15.4  
15.6  
15.8  
16.1  
16.4  
16.6  
16.9  
17.1  
17.3  
17.6  
17.8  
18.1  
18.3  
1.14  
1.22  
1.29  
1.38  
1.46  
1.56  
1.66  
1.75  
1.87  
1.98  
2.10  
2.22  
2.34  
2.47  
2.60  
2.74  
2.89  
3.03  
3.18  
3.32  
3.46  
3.60  
3.74  
3.89  
13.7  
13.9  
14.2  
14.4  
14.6  
14.9  
15.1  
15.3  
15.5  
15.8  
16.0  
16.2  
16.5  
16.7  
16.9  
17.2  
17.4  
17.7  
17.9  
18.2  
18.4  
18.7  
—
1.32  
1.40  
1.49  
1.59  
1.68  
1.78  
1.88  
1.99  
2.10  
2.20  
2.31  
2.44  
2.56  
2.69  
2.83  
2.96  
3.11  
3.27  
3.46  
3.57  
3.72  
3.87  
—
14.7  
14.9  
15.1  
15.3  
15.5  
15.7  
16.0  
16.2  
16.4  
16.6  
16.8  
17.1  
17.3  
17.5  
17.8  
18.0  
18.2  
18.4  
18.7  
18.9  
—
1.49  
1.57  
1.65  
1.75  
1.86  
1.96  
2.07  
2.20  
2.30  
2.44  
2.56  
2.69  
2.83  
2.96  
3.11  
3.26  
8.38  
3.55  
3.70  
3.85  
—
15.6  
15.8  
16.0  
16.2  
16.4  
16.6  
16.8  
17.0  
17.2  
17.4  
17.6  
17.8  
18.1  
18.3  
18.5  
18.7  
19.0  
19.2  
—
1.71  
1.80  
1.89  
1.96  
2.05  
2.15  
2.26  
2.36  
2.50  
2.64  
2.77  
2.90  
3.05  
3.20  
3.34  
3.51  
3.67  
3.84  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (Pa)  
400  
AIRFLOW  
(L/s)  
300  
450  
350  
500  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
R/s  
BkW  
1900  
1950  
2000  
2050  
2100  
2150  
2200  
2250  
2235  
2400  
2450  
2500  
2550  
2600  
2650  
2700  
2750  
2800  
2850  
2900  
2950  
3000  
3050  
3100  
16.6  
16.7  
16.9  
17.1  
17.2  
17.4  
17.6  
17.8  
18.0  
18.2  
18.4  
18.6  
18.8  
19.0  
19.2  
19.4  
19.7  
—
1.91  
2.00  
2.11  
2.20  
2.30  
2.42  
2.52  
2.61  
2.71  
2.83  
2.97  
3.09  
3.25  
3.42  
3.58  
3.73  
3.91  
—
17.5  
17.6  
17.8  
17.9  
18.1  
18.2  
18.4  
18.6  
18.8  
18.9  
19.1  
19.3  
19.5  
19.7  
19.9  
20.1  
—
—
—
—
—
—
—
—
2.11  
2.21  
2.31  
2.42  
2.53  
2.64  
2.76  
2.88  
3.00  
3.13  
3.24  
3.35  
3.49  
3.63  
3.81  
3.92  
—
—
—
—
—
—
—
—
18.2  
18.4  
18.6  
18.7  
18.9  
19.0  
19.2  
19.4  
19.5  
19.7  
19.9  
20.0  
20.2  
20.4  
—
—
—
—
—
—
—
—
—
2.29  
2.41  
2.52  
2.64  
2.76  
2.88  
2.99  
3.11  
3.26  
3.39  
3.52  
3.66  
3.81  
3.95  
—
—
—
—
—
—
—
—
—
18.9  
19.1  
19.3  
19.5  
19.6  
19.8  
20.0  
20.1  
20.3  
20.5  
20.6  
20.8  
—
—
—
—
—
—
—
—
—
2.44  
2.58  
2.71  
2.84  
2.97  
3.10  
3.23  
3.37  
3.49  
3.64  
3.77  
3.93  
—
—
—
—
—
—
—
—
—
19.3  
19.6  
19.9  
20.1  
20.3  
20.5  
20.7  
20.9  
21.0  
21.2  
—
—
—
—
—
—
—
—
—
2.55  
2.71  
2.87  
3.02  
3.17  
3.31  
3.45  
3.60  
3.75  
3.89  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
BkW — Fan Input kW x Motor Efficiency  
R/s  
Revolutions Per Second of Blower Wheel  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2. indicates field-supplied motor and drive are required.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
5. Standard drive range is 12.0 to 15.0 r/s. All other speeds  
require a field-supplied drive.  
6. Maximum continuous BkW is 2.76. Extensive motor and electri-  
cal testing on these units ensures that the full range of the  
motor can be utilized with confidence. Using the fan motors up  
to the ratings shown will not result in nuisance tripping or pre-  
mature motor failure. Unit warranty will not be affected.  
7. Interpolation is permissible. Do not extrapolate.  
—
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 18 — Fan Performance, 48TF008 — Vertical Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
2200  
2250  
2300  
2400  
2500  
2550  
2600  
2700  
2800  
2900  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3750  
506  
514  
521  
536  
551  
559  
567  
582  
598  
614  
630  
646  
662  
679  
695  
712  
729  
745  
754  
0.52  
0.55  
0.56  
0.63  
0.69  
0.72  
0.75  
0.83  
0.90  
0.98  
1.07  
1.16  
1.26  
1.36  
1.47  
1.59  
1.71  
1.84  
1.91  
586  
593  
600  
613  
626  
634  
641  
655  
670  
684  
699  
714  
729  
744  
759  
774  
790  
805  
813  
0.72  
0.76  
0.79  
0.85  
0.93  
0.97  
1.00  
1.08  
1.17  
1.25  
1.35  
1.45  
1.55  
1.66  
1.78  
1.90  
2.03  
2.17  
2.24  
656  
662  
668  
680  
693  
700  
706  
719  
732  
745  
759  
773  
787  
801  
816  
830  
845  
860  
868  
0.95  
0.99  
1.02  
1.09  
1.17  
1.21  
1.25  
1.34  
1.43  
1.53  
1.63  
1.74  
1.86  
1.98  
2.10  
2.23  
2.37  
2.52  
2.59  
718  
724  
730  
741  
753  
759  
764  
776  
789  
802  
815  
828  
841  
854  
867  
881  
895  
909  
917  
1.18  
1.22  
1.26  
1.34  
1.43  
1.48  
1.52  
1.61  
1.71  
1.81  
1.92  
2.04  
2.16  
2.29  
2.42  
2.56  
2.71  
2.87  
2.95  
EXTERNAL STATIC PRESSURE (in. wg)  
1.2 1.4  
AIRFLOW  
(Cfm)  
1.0  
1.6  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
2200  
2250  
2300  
2400  
2500  
2550  
2600  
2700  
2800  
2900  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3750  
776  
781  
786  
796  
808  
814  
819  
831  
842  
854  
866  
878  
891  
904  
917  
930  
943  
956  
963  
1.43  
1.78  
1.50  
1.59  
1.69  
1.74  
1.79  
1.89  
2.00  
2.11  
2.23  
2.35  
2.48  
2.61  
2.75  
2.90  
3.05  
3.22  
3.30  
838  
841  
843  
849  
859  
864  
869  
880  
892  
903  
915  
926  
938  
950  
963  
976  
988  
—
1.78  
1.81  
1.83  
1.88  
1.96  
2.01  
2.06  
2.17  
2.29  
2.42  
2.54  
2.67  
2.81  
2.95  
3.10  
3.25  
3.41  
—
898  
902  
905  
910  
912  
915  
918  
927  
938  
949  
961  
972  
983  
995  
1007  
—
2.21  
2.25  
2.28  
2.31  
2.31  
2.34  
2.37  
2.47  
2.58  
2.71  
2.85  
3.00  
3.14  
3.30  
3.45  
—
935  
939  
943  
952  
963  
968  
973  
976  
983  
993  
1003  
1015  
1026  
—
2.58  
2.60  
2.62  
2.74  
2.81  
2.81  
2.81  
2.84  
2.92  
3.03  
3.17  
3.32  
3.47  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 492 to 700 rpm. All other rpms require  
a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 2.4. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 19 — Fan Performance, 48TF012 — Vertical Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
1.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
592  
607  
622  
638  
653  
669  
684  
700  
715  
731  
747  
763  
778  
794  
810  
826  
842  
858  
874  
890  
906  
0.76  
0.83  
0.90  
0.98  
1.06  
1.15  
1.24  
1.33  
1.43  
1.54  
1.65  
1.76  
1.88  
2.00  
2.13  
2.27  
2.41  
2.55  
2.70  
2.86  
3.03  
661  
676  
690  
705  
719  
733  
747  
760  
774  
787  
801  
816  
831  
846  
861  
876  
892  
907  
922  
938  
953  
0.93  
1.01  
1.09  
1.17  
1.26  
1.35  
1.44  
1.54  
1.64  
1.74  
1.85  
1.97  
2.10  
2.23  
2.37  
2.52  
2.67  
2.83  
2.99  
3.16  
3.33  
722  
734  
746  
759  
772  
786  
800  
814  
828  
843  
857  
872  
886  
900  
913  
927  
940  
954  
968  
—
1.09  
1.17  
1.25  
1.33  
1.43  
1.53  
1.64  
1.75  
1.86  
1.98  
2.10  
2.23  
2.36  
2.50  
2.64  
2.78  
2.92  
3.08  
3.24  
—
779  
791  
803  
815  
826  
838  
850  
863  
875  
888  
902  
916  
929  
943  
958  
973  
987  
1002  
—
1.26  
1.34  
1.43  
1.52  
1.62  
1.72  
1.82  
1.92  
2.04  
2.16  
2.30  
2.44  
2.58  
2.73  
2.89  
3.04  
3.21  
3.38  
—
829  
840  
852  
864  
876  
888  
900  
912  
924  
936  
948  
960  
972  
985  
999  
1012  
—
1.42  
1.51  
1.60  
1.70  
1.81  
1.91  
2.03  
2.14  
2.26  
2.30  
2.51  
2.64  
2.78  
2.93  
3.09  
3.26  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
(Cfm)  
1.2  
1.8  
1.4  
2.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
880  
890  
900  
910  
921  
933  
945  
957  
969  
981  
993  
1005  
1016  
1028  
1040  
—
1.58  
1.68  
1.77  
1.88  
1.98  
2.10  
2.22  
2.34  
2.47  
2.60  
2.74  
2.88  
3.03  
3.17  
3.32  
—
924  
935  
946  
957  
967  
976  
986  
998  
1010  
1022  
1034  
1046  
1058  
—
—
—
—
—
—
—
—
1.73  
1.84  
1.95  
2.06  
2.17  
2.29  
2.41  
2.54  
2.67  
2.81  
2.96  
3.11  
3.26  
—
—
—
—
—
—
—
—
970  
977  
987  
998  
1009  
1020  
1030  
1039  
1049  
1060  
1072  
1084  
—
—
—
—
—
—
—
—
—
1.89  
2.00  
2.11  
2.23  
2.35  
2.48  
2.61  
2.74  
2.87  
3.02  
3.17  
3.32  
—
—
—
—
—
—
—
—
—
1019  
1026  
1029  
1037  
1047  
1058  
1069  
1081  
1091  
1100  
1110  
—
—
—
—
—
—
—
—
—
2.00  
2.17  
2.28  
2.40  
2.53  
2.66  
2.80  
2.94  
3.08  
3.23  
3.38  
—
—
—
—
—
—
—
—
—
1066  
1070  
1075  
1082  
1087  
1095  
1106  
1117  
1128  
—
—
—
—
—
—
—
—
—
—
—
—
2.30  
2.44  
2.51  
2.58  
2.70  
2.84  
2.98  
3.13  
3.29  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 571 to 779 rpm. All other speeds  
require a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 2.4. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 20 — Fan Performance, 48TF014 — Vertical Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
1.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
5100  
5200  
5300  
5400  
5500  
5600  
5700  
5800  
5900  
6000  
6100  
6200  
729  
745  
761  
777  
793  
810  
826  
842  
859  
876  
892  
909  
926  
942  
959  
976  
993  
1010  
1027  
1043  
1060  
1077  
1094  
1111  
1128  
1145  
1.36  
1.46  
1.56  
1.67  
1.79  
1.91  
2.04  
2.17  
2.31  
2.46  
2.60  
2.77  
2.93  
3.11  
3.29  
3.47  
3.67  
3.87  
4.07  
4.29  
4.51  
4.74  
4.98  
5.22  
5.48  
5.74  
790  
805  
820  
836  
851  
867  
883  
898  
914  
930  
945  
961  
977  
1.58  
1.69  
1.80  
1.92  
2.05  
2.18  
2.32  
2.46  
2.60  
2.76  
2.91  
3.07  
3.24  
3.41  
3.60  
3.78  
3.98  
4.18  
4.39  
4.61  
4.83  
5.07  
5.41  
5.55  
—
847  
861  
875  
889  
904  
918  
933  
948  
962  
1.79  
1.89  
2.02  
2.14  
2.27  
2.41  
2.55  
2.70  
2.85  
3.01  
3.18  
3.36  
3.54  
3.73  
3.92  
4.12  
4.33  
4.54  
4.76  
4.99  
5.22  
5.46  
5.70  
—
902  
915  
928  
941  
955  
968  
982  
996  
1010  
1024  
2039  
1053  
1068  
1080  
1097  
1112  
1127  
1142  
1157  
1173  
1189  
—
2.06  
2.17  
2.29  
2.40  
2.42  
2.54  
2.79  
2.93  
3.09  
3.26  
3.43  
3.61  
3.80  
3.90  
4.19  
4.40  
4.61  
4.84  
5.07  
5.31  
5.55  
—
955  
967  
979  
2.29  
2.41  
2.55  
2.68  
2.82  
2.96  
3.11  
3.25  
3.40  
3.55  
3.71  
3.88  
4.06  
4.25  
4.46  
4.67  
4.90  
5.13  
5.36  
5.61  
—
991  
1004  
1017  
1030  
1043  
1056  
1070  
1083  
1097  
1111  
1126  
1139  
1153  
1168  
1182  
1197  
1211  
—
977  
992  
1008  
1024  
1039  
1055  
1071  
1086  
1102  
1118  
1133  
1149  
1165  
1181  
—
993  
1009  
1025  
1041  
1057  
1073  
1090  
1106  
1122  
1139  
1155  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
(Cfm)  
1.2  
1.8  
1.4  
2.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
5100  
5200  
5300  
5400  
5500  
5600  
5700  
5800  
5900  
6000  
6100  
6200  
1008  
1019  
1029  
1040  
1052  
1064  
1076  
1088  
1101  
1114  
1126  
1140  
1153  
1166  
1180  
1194  
1208  
1221  
1235  
—
2.55  
2.67  
2.80  
2.94  
3.08  
3.23  
3.40  
3.56  
3.73  
3.90  
4.07  
4.25  
4.41  
4.59  
4.78  
4.98  
5.19  
5.41  
5.64  
—
1060  
1070  
1079  
1089  
1100  
1110  
1121  
1133  
1144  
1157  
1169  
1181  
1194  
1207  
1220  
1233  
1246  
—
—
—
—
—
—
—
—
—
2.80  
2.94  
3.07  
3.22  
3.36  
3.51  
3.67  
3.84  
4.00  
4.19  
4.38  
4.58  
4.77  
4.97  
5.18  
5.38  
5.58  
—
—
—
—
—
—
—
—
—
1108  
1118  
1128  
1137  
1147  
1157  
1167  
1178  
1188  
1199  
1210  
1222  
1234  
1247  
1259  
1272  
—
—
—
—
—
—
—
—
—
3.05  
3.19  
3.34  
3.49  
3.65  
3.81  
3.97  
4.14  
4.31  
4.49  
4.68  
4.87  
5.09  
5.30  
5.52  
5.74  
—
—
—
—
—
—
—
—
—
1152  
1163  
1173  
1183  
1193  
1202  
1212  
1222  
1232  
1242  
1252  
1263  
1274  
1286  
—
—
—
—
—
—
—
—
—
3.27  
3.44  
3.60  
3.76  
3.93  
4.09  
4.27  
4.44  
4.62  
4.81  
5.00  
5.20  
5.40  
5.62  
—
—
—
—
—
—
—
—
—
1190  
1203  
1214  
1225  
1236  
1245  
1255  
1265  
1274  
1284  
1294  
—
—
—
—
—
—
—
—
—
3.46  
3.65  
3.83  
4.00  
4.19  
4.38  
4.56  
4.74  
4.93  
5.13  
5.33  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 717 to 900 rpm. All other rpms require  
a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 3.7. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 21 — Fan Performance, 48TF008 — Horizontal Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
0.9  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
2200  
2250  
2300  
2400  
2500  
2550  
2600  
2700  
2800  
2900  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3750  
499  
507  
513  
528  
542  
550  
557  
573  
588  
604  
620  
636  
652  
668  
684  
701  
717  
733  
742  
0.50  
0.53  
0.55  
0.60  
0.66  
0.69  
0.72  
0.79  
0.86  
0.94  
1.02  
1.11  
1.21  
1.31  
1.41  
1.53  
1.65  
1.77  
1.84  
580  
586  
592  
606  
619  
627  
634  
648  
662  
676  
690  
704  
718  
732  
747  
762  
777  
792  
800  
0.70  
0.73  
0.76  
0.83  
0.90  
0.94  
0.97  
1.05  
1.13  
1.21  
1.30  
1.39  
1.49  
1.59  
1.70  
1.82  
1.94  
2.07  
2.14  
652  
658  
663  
674  
686  
692  
698  
711  
723  
737  
750  
764  
778  
793  
807  
821  
835  
849  
856  
0.94  
0.97  
1.00  
1.06  
1.13  
1.17  
1.21  
1.29  
1.38  
1.48  
1.58  
1.69  
1.80  
1.92  
2.04  
2.16  
2.29  
2.42  
2.49  
717  
722  
727  
738  
748  
754  
759  
770  
782  
794  
806  
818  
831  
844  
857  
871  
885  
899  
907  
1.17  
1.22  
1.26  
1.34  
1.41  
1.45  
1.49  
1.58  
1.66  
1.76  
1.86  
1.97  
2.09  
2.21  
2.35  
2.48  
2.63  
2.78  
2.86  
748  
752  
756  
766  
777  
783  
787  
798  
809  
821  
832  
844  
856  
869  
882  
895  
908  
922  
929  
1.30  
1.34  
1.38  
1.46  
1.55  
1.60  
1.64  
1.73  
1.82  
1.92  
2.02  
2.13  
2.25  
2.37  
2.51  
2.64  
2.79  
2.95  
3.03  
EXTERNAL STATIC PRESSURE (in. wg)  
1.2 1.4  
AIRFLOW  
(Cfm)  
1.0  
1.6  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
2200  
2250  
2300  
2400  
2500  
2550  
2600  
2700  
2800  
2900  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3750  
779  
783  
786  
795  
806  
812  
816  
827  
837  
848  
849  
870  
882  
894  
907  
919  
932  
945  
952  
1.43  
1.46  
1.49  
1.58  
1.68  
1.74  
1.79  
1.88  
1.98  
2.08  
2.18  
2.29  
2.40  
2.53  
2.66  
2.80  
2.95  
3.11  
3.20  
839  
843  
846  
853  
859  
864  
868  
878  
889  
900  
910  
920  
931  
942  
954  
966  
978  
990  
997  
1.78  
1.81  
1.84  
1.88  
1.94  
1.99  
2.04  
2.16  
2.29  
2.41  
2.52  
2.64  
2.76  
2.89  
3.02  
3.15  
3.30  
3.45  
3.54  
905  
908  
910  
912  
919  
920  
921  
928  
937  
947  
958  
968  
979  
2.21  
2.25  
2.25  
2.31  
2.37  
2.39  
2.41  
2.45  
2.57  
2.70  
2.85  
2.99  
3.13  
3.26  
3.40  
3.55  
3.69  
3.84  
3.93  
951  
955  
959  
967  
971  
974  
976  
983  
986  
2.57  
2.59  
2.61  
2.68  
2.73  
2.76  
2.78  
2.88  
2.91  
3.01  
3.15  
3.30  
3.47  
3.63  
3.79  
3.94  
4.10  
4.28  
5.27  
993  
1002  
1012  
1023  
1034  
1044  
1054  
1065  
1076  
1082  
989  
1000  
1011  
1022  
1034  
1040  
LEGEND  
5. Standard drive range is 492 to 700 rpm. All other rpms require  
a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 2.4. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 22 — Fan Performance, 48TF012 — Horizontal Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
1.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
552  
565  
578  
591  
605  
619  
633  
648  
662  
677  
692  
707  
722  
737  
752  
768  
783  
799  
814  
—
0.68  
0.74  
0.81  
0.88  
0.96  
1.04  
1.13  
1.23  
1.33  
1.44  
1.55  
1.67  
1.80  
1.94  
2.08  
2.24  
2.40  
2.56  
2.74  
—
632  
644  
656  
668  
680  
691  
703  
714  
726  
738  
750  
762  
775  
787  
800  
814  
827  
841  
855  
868  
883  
0.87  
0.93  
1.00  
1.08  
1.16  
1.23  
1.31  
1.39  
1.51  
1.61  
1.73  
1.84  
1.97  
2.09  
2.21  
2.35  
2.50  
2.64  
2.80  
2.90  
3.10  
701  
711  
723  
734  
745  
755  
766  
777  
789  
801  
813  
825  
837  
848  
860  
871  
883  
894  
906  
918  
931  
1.05  
1.12  
1.20  
1.28  
1.36  
1.44  
1.52  
1.61  
1.72  
1.82  
1.94  
2.05  
2.16  
2.27  
2.39  
2.51  
2.64  
2.77  
2.91  
3.05  
3.21  
761  
772  
782  
793  
803  
813  
824  
835  
846  
857  
868  
878  
889  
900  
912  
924  
937  
949  
961  
972  
—
1.22  
1.31  
1.39  
1.47  
1.56  
1.65  
1.74  
1.85  
1.95  
2.06  
2.17  
2.28  
2.40  
252  
2.66  
2.80  
2.95  
3.10  
3.26  
3.40  
—
816  
825  
835  
845  
856  
867  
877  
887  
897  
908  
918  
929  
941  
952  
962  
973  
983  
994  
—
1.36  
1.45  
1.55  
1.65  
1.75  
1.86  
1.97  
2.07  
2.18  
2.29  
2.40  
2.53  
2.66  
2.80  
2.93  
3.07  
3.21  
3.36  
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
(Cfm)  
1.2  
1.8  
1.4  
2.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3000  
3100  
3200  
3300  
3400  
3500  
3600  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
871  
879  
887  
895  
904  
914  
924  
935  
946  
956  
967  
977  
987  
999  
1008  
1019  
—
1.54  
1.63  
1.71  
1.80  
1.91  
2.03  
2.15  
2.28  
2.40  
2.53  
2.66  
2.78  
2.91  
3.04  
3.19  
3.34  
—
918  
928  
937  
946  
953  
961  
970  
980  
989  
1000  
1010  
1021  
1032  
1042  
—
—
—
—
—
—
—
1.67  
1.78  
1.90  
2.00  
2.10  
2.20  
2.32  
2.45  
2.58  
2.73  
2.87  
3.02  
3.17  
3.32  
—
—
—
—
—
—
—
967  
973  
981  
991  
1000  
1009  
1017  
1024  
1033  
1042  
1052  
1062  
1072  
—
—
—
—
—
—
—
—
1.89  
1.94  
2.04  
2.16  
2.29  
2.41  
2.53  
2.64  
2.76  
2.91  
3.06  
3.22  
3.38  
—
—
—
—
—
—
—
—
1010  
1018  
1026  
1032  
1041  
1051  
1061  
1069  
1077  
1085  
1093  
1102  
—
—
—
—
—
—
—
—
—
2.09  
2.17  
2.26  
2.32  
2.44  
2.57  
2.72  
2.87  
2.99  
3.12  
3.24  
3.41  
—
—
—
—
—
—
—
—
—
1063  
1070  
1075  
1080  
1083  
1090  
1099  
1109  
1118  
1127  
—
—
—
—
—
—
—
—
—
2.46  
2.51  
2.57  
2.64  
2.65  
2.74  
2.88  
3.03  
3.20  
3.36  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 571 to 779 rpm. All other rpms require  
a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 2.4. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
32  
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Table 23 — Fan Performance, 48TF014 — Horizontal Discharge Units (English)  
EXTERNAL STATIC PRESSURE (in. wg)  
AIRFLOW  
(Cfm)  
0.2  
0.8  
0.4  
0.6  
1.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
5100  
5200  
5300  
5400  
5500  
5600  
5700  
5800  
5900  
6000  
6100  
6200  
677  
691  
705  
720  
734  
749  
764  
779  
793  
808  
822  
837  
852  
867  
882  
896  
911  
926  
940  
955  
970  
985  
1000  
1015  
1030  
1046  
1.20  
1.28  
1.37  
1.47  
1.56  
1.66  
1.77  
1.88  
1.99  
2.11  
2.24  
2.37  
2.51  
2.65  
2.79  
2.95  
3.11  
3.27  
3.44  
3.62  
3.80  
3.99  
4.18  
4.39  
4.59  
4.81  
748  
761  
773  
786  
800  
813  
826  
840  
854  
868  
882  
896  
910  
924  
938  
952  
967  
1.43  
1.52  
1.62  
1.71  
1.82  
1.92  
2.04  
2.16  
2.28  
2.42  
2.56  
2.71  
2.86  
3.01  
3.17  
3.33  
3.50  
3.68  
3.86  
4.04  
4.23  
4.42  
4.62  
4.83  
5.04  
5.26  
810  
822  
834  
847  
860  
873  
886  
899  
912  
925  
937  
950  
963  
977  
990  
1003  
1017  
1030  
1044  
1058  
1072  
1086  
1100  
1114  
1128  
1142  
1.65  
1.75  
1.86  
1.97  
2.09  
2.21  
2.33  
2.46  
2.59  
2.73  
2.86  
3.00  
3.15  
3.30  
3.46  
3.63  
3.80  
3.98  
4.17  
4.38  
4.59  
4.80  
5.02  
5.25  
5.48  
5.71  
869  
880  
891  
902  
914  
926  
938  
951  
963  
1.89  
1.98  
2.08  
2.19  
2.31  
2.44  
2.57  
2.71  
2.86  
3.00  
3.16  
3.32  
3.48  
3.65  
3.82  
4.00  
4.18  
4.35  
4.54  
4.73  
4.93  
5.14  
5.36  
5.58  
—
928  
937  
947  
956  
967  
978  
989  
1000  
1012  
1024  
1036  
1048  
1060  
1073  
1085  
1098  
1111  
1124  
1137  
1150  
1163  
1176  
—
2.17  
2.28  
2.39  
2.50  
2.60  
2.71  
2.83  
2.96  
3.09  
3.25  
3.42  
3.59  
3.76  
3.94  
4.12  
4.30  
4.50  
4.70  
4.91  
5.12  
5.34  
5.56  
—
975  
988  
1001  
1014  
1027  
1040  
1053  
1066  
1079  
1092  
1105  
1118  
1131  
1144  
1158  
—
981  
995  
1010  
1024  
1039  
1053  
1068  
1083  
1097  
—
—
—
—
—
—
—
—
EXTERNAL STATIC PRESSURE (in. wg)  
1.6  
AIRFLOW  
(Cfm)  
1.2  
1.8  
1.4  
2.0  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
Rpm  
Bhp  
3700  
3800  
3900  
4000  
4100  
4200  
4300  
4400  
4500  
4600  
4700  
4800  
4900  
5000  
5100  
5200  
5300  
5400  
5500  
5600  
5700  
5800  
5900  
6000  
6100  
6200  
984  
993  
2.43  
2.55  
2.66  
2.79  
2.91  
3.04  
3.18  
3.31  
3.43  
3.56  
3.70  
3.86  
4.02  
4.20  
4.40  
4.60  
4.80  
5.01  
5.22  
5.44  
5.67  
—
1036  
1046  
1055  
1064  
1072  
1081  
1090  
1100  
1109  
1119  
1129  
1139  
1150  
1161  
1172  
1183  
1194  
1206  
1218  
1230  
—
2.68  
2.81  
2.94  
3.07  
3.20  
3.34  
3.48  
3.63  
3.78  
3.93  
4.09  
4.24  
4.38  
4.54  
4.71  
4.91  
5.08  
5.29  
5.52  
5.75  
—
1080  
1092  
1102  
1112  
1121  
1130  
1139  
1148  
1156  
1166  
1175  
1185  
1194  
1204  
1214  
1225  
1236  
1247  
—
2.90  
3.05  
3.20  
3.34  
3.49  
3.64  
3.79  
3.94  
4.09  
4.26  
4.43  
4.60  
4.77  
4.95  
5.13  
5.29  
5.47  
5.65  
—
1114  
1129  
1143  
1155  
1165  
1175  
1185  
1194  
1203  
1212  
1221  
1230  
1239  
1248  
1257  
1267  
—
—
—
—
—
—
—
—
—
3.07  
3.25  
3.42  
3.59  
3.76  
3.92  
4.08  
4.25  
4.42  
4.58  
4.76  
4.93  
5.12  
5.31  
5.61  
5.70  
—
—
—
—
—
—
—
—
—
1135  
1156  
1174  
1190  
1203  
1215  
1226  
1236  
1246  
1255  
1264  
1273  
1282  
1291  
—
—
—
—
—
—
—
—
—
3.17  
3.39  
3.59  
3.80  
3.99  
4.18  
4.36  
4.54  
4.72  
4.91  
5.09  
5.28  
5.47  
5.66  
—
—
—
—
—
—
—
—
—
1002  
1011  
1021  
1030  
1040  
1050  
1061  
1071  
1082  
1093  
1105  
1117  
1129  
1141  
1153  
1166  
1178  
1190  
1203  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND  
5. Standard drive range is 717 to 900 rpm. All other rpms require  
a field-supplied drive.  
Bhp  
—
Brake Horsepower at Motor Shaft  
Rpm — Revolutions Per Minute of Blower Wheel  
6. Maximum continuous bhp is 3.7. Extensive motor and electrical  
testing on these units ensures that the full range of the motor  
can be utilized with confidence. Using the fan motors up to the  
ratings shown will not result in nuisance tripping or premature  
motor failure. Unit warranty will not be affected.  
NOTES:  
1. Boldface indicates field-supplied drive required. (See Note 5.)  
2.  
indicates field-supplied motor and drive are required.  
7. Interpolation is permissible. Do not extrapolate.  
3. Values include losses for filters, unit casing, and wet coils.  
4. Use of a field-supplied motor may affect wire sizing. Contact  
your Carrier representative to verify.  
33  
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TO SHUT OFF UNIT — Set system selector switch at OFF  
position. Resetting thermostat at a position above room tem-  
perature shuts unit off temporarily until space temperature ex-  
ceeds thermostat setting.  
START-UP  
Unit Preparation — Make sure that unit has been in-  
stalled in accordance with these installation instructions and  
applicable codes. Make sure that Start-Up Checklist, located on  
back page of this booklet, has been completed and filled out.  
Main Burners — Main burners are factory set and should  
require no adjustment.  
Return-Air Filters — Make sure correct filters are in-  
stalled in filter tracks (see Tables 1A and 1B). Do not operate  
unit without return-air filters.  
TO CHECK ignition of main burners and heating controls,  
move thermostat set point above room temperature and verify  
that the burners light and evaporator fan is energized. After en-  
suring that the unit continues to heat the building, lower the  
thermostat setting below the room temperature and verify that  
the burners and evaporator fan turn off (fan will turn off only if  
fan selector switch is in the AUTO. position). Refer to Table 24  
for the correct orifice to use at high altitudes.  
Outdoor-Air Inlet Screens — Outdoor-air inlet screens  
must be in place before operating unit.  
Compressor Mounting — Compressors are internally  
spring mounted. Do not loosen or remove compressor hold-  
down bolts. On 48TF014 units, remove the tiedown bands that  
hold the compressors together.  
NOTE: Upon a call for heat, the main burners will remain on  
for a minimum of 60 seconds.  
Internal Wiring — Check all electrical connections in  
unit control boxes. Tighten as required. Ensure wiring does not  
come into direct contact with refrigerant tubing.  
ADJUST GAS INPUT — The gas input to the unit is deter-  
mined by measuring the gas flow at the meter or by measuring  
the manifold pressure. Manifold pressure should be 872 Pa  
(3.5 in. wg).  
NOTE: Unit uses a 2 stage gas valve. There is no need to  
adjust the “Low Fire” manifold pressure.  
Measure Gas Flow (Natural Gas Units) — Minor adjustment  
to the gas flow can be made by changing the manifold pressure.  
The manifold pressure must be 872 Pa (3.5 in wg). Normal  
manifold pressure is 872 Pa (3.5 in. wg) in high fire, W1 and  
W2 inputs to gas valve.  
Proceed as follows:  
1. Turn off gas supply to unit.  
2. Remove pipe plug on manifold then connect manometer  
at this point. Turn on gas to unit. Ensure gas valve is in  
high fire operation.  
Observe manifold pressure and proceed as follows to adjust  
gas input:  
Refrigerant Service Ports — Each refrigerant sys-  
tem has 4 Schrader-type service gage ports: one on the suction  
line, one on the liquid line, and two on the compressor dis-  
charge line. Be sure that caps on the ports are tight. One  
Schrader-type valve is located under both the high-pressure  
switch and the low-pressure switch when ordered as an option.  
High Flow Valves — Located on the compressor hot gas  
and suction tubes are High Flow Valves. Large black plastic  
caps distinguish these valves with O-rings located inside the  
caps. These valves cannot be accessed for service in the field.  
Ensure the plastic caps are in place and tight or the possibility  
of refrigerant leakage could occur.  
Compressor Rotation — On 3-phase units with scroll  
compressors, it is important to be certain compressor is rotating  
in the proper direction. To determine whether or not compres-  
sor is rotating in the proper direction:  
1. Connect service gages to suction and discharge pressure  
fittings.  
1. Remove cover screw over regulator adjustment screw on  
gas valve. Ensure gas valve is operating in high fire  
mode.  
2. Turn regulator adjustment screw clockwise to increase  
gas input, or turn regulator adjustment screw counter-  
clockwise to decrease input. High fire manifold pressure  
must be 872 Pa (3.5 in. wg).  
2. Energize the compressor.  
3. The suction pressure should drop and the discharge pres-  
sure should rise, as is normal on any start-up.  
If the suction pressure does not drop and the discharge pres-  
sure does not rise to normal levels:  
1. Note that the evaporator fan is probably also rotating in  
the wrong direction.  
2. Turn off power to the unit and install lockout tag.  
3. Reverse any two of the unit power leads.  
Unsafe operation of the unit may result if manifold pres-  
sure is outside 847 to 897 Pa (3.4 to 3.6 in. wg) range. Per-  
sonal injury or unit damage may result.  
4. Reapply power to unit. Reenergize compressor.  
3. Replace cover screw cap on gas valve.  
The suction and discharge pressure levels should now move  
to their normal start-up levels.  
NOTE: When the compressor is rotating in the wrong direc-  
tion, the unit will make an elevated level of noise and will not  
provide cooling.  
4. Turn off gas supply to unit. Remove manometer from  
pressure tap and replace pipe plug on gas valve. Turn on  
gas to unit and check for leaks.  
Heating  
1. Purge gas supply line of air by opening union ahead of  
gas valve. When gas odor is detected, tighten union and  
wait 5 minutes before proceeding.  
Cooling — To start unit, turn on main power supply. Set  
system selector switch at COOL position and fan switch at  
AUTO. position. Adjust thermostat to a setting below room  
temperature. Compressor, indoor and outdoor fans start on clo-  
sure of contactors.  
Check unit charge. Refer to Refrigerant Charge section,  
page 37. Unit must operate a minimum of 15 minutes before  
adjusting charge.  
2. Turn on electrical supply and open manual gas valve.  
3. Set system switch selector at HEAT position and fan  
switch at AUTO. or ON position. Set heating temperature  
lever above room temperature.  
4. The induced-draft motor will start, purging heat  
exchangers.  
Reset thermostat at a position above room temperature.  
Compressor and outdoor fans will shut off. Evaporator fan will  
shut off after 30-second delay.  
34  
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5. After a call for heating, the main burners should light  
within 5 seconds. If the burners do not light, then there is  
a 22-second delay before another 5-second ignition try.  
If the burners still do not light, the time delay is repeated.  
If the burners do not light within 15 minutes, there is a  
lockout. To reset the control, break the 24 v power to W1.  
6. The evaporator-fan motor will turn on 45 seconds after  
the burners are ignited.  
7. The evaporator-fan motor will turn off 45 seconds after  
the thermostat temperature is satisfied.  
Safety Relief — A soft-solder joint at the suction line  
Schrader port provides pressure relief under abnormal tempera-  
ture and pressure conditions.  
Ventilation (Continuous Fan) — Set fan and system  
selector switches at ON and OFF positions, respectively.  
Evaporator fan operates continuously to provide constant air  
circulation. When the evaporator-fan selector switch is turned  
to the OFF position, there is a 30-second delay before the fan  
turns off.  
Operating Sequence  
8. Adjust airflow to obtain a temperature rise within the  
range specified on the unit nameplate and in Table 1A  
or 1B.  
COOLING, UNITS WITHOUT ECONOMIZER — When  
thermostat calls for cooling, terminals G and Y1 are energized.  
The indoor (evaporator) fan contactor (IFC) and compressor  
contactor no. 1 (C1) are energized, and evaporator-fan motors,  
compressor no. 1, and both condenser fans start. The condenser-  
fan motor runs continuously while unit is cooling. If the thermo-  
stat calls for a second stage of cooling by energizing Y2, com-  
pressor contactor no. 2 (C2) is energized and compressor no. 2  
starts.  
When the thermostat is satisfied, C1 and C2 are deener-  
gized and the compressors and outdoor (condenser) fan motors  
(OFM) shut off. After a 30-second delay, the indoor (evapora-  
tor) fan motor (IFM) shuts off. If the thermostat fan selector  
switch is in the ON position, the evaporator motor will run  
continuously.  
HEATING, UNITS WITHOUT ECONOMIZER — When  
the thermostat calls for heating, terminal W1 is energized. In  
order to prevent thermostat short-cycling, the unit is locked  
into the Heating mode for at least 1 minute when W1 is ener-  
gized. The induced-draft motor (IDM) is then energized and  
the burner ignition sequence begins. The indoor (evaporator)  
fan motor (IFM) is energized 45 seconds after a flame is ignit-  
ed. On units equipped for two stages of heat, when additional  
heat is needed, W2 is energized and the high-fire solenoid on  
the main gas valve (MGV) is energized. When the thermostat  
is satisfied and W1 and W2 are deenergized, the IFM stops af-  
ter a 45-second time-off delay.  
COOLING, UNITS WITH DURABLADE ECONO-  
MIZER — When the outdoor-air temperature is above the  
OAT (outdoor-air thermostat) setting and the room thermostat  
calls for cooling, compressor contactor no. 1 is energized to  
start compressor no. 1 and the outdoor (condenser) fan motor  
(OFM). The indoor (evaporator) fan motor (IFM) is energized  
and the economizer damper moves to the minimum position.  
Upon a further call for cooling, compressor contactor no. 2 will  
be energized, starting compressor no. 2. After the thermostat is  
satisfied, the damper moves to the fully closed position when  
using an auto fan or to the minimum position when using a  
continuous fan.  
Table 24 — Altitude Compensation*  
31.4, 50.4, AND 59.8 kW  
65.6 kW  
(107,000, 172,000 AND  
(224,000 BTUH)  
204,000 BTUH  
NOMINAL INPUT  
ELEVATION  
m or km  
(ft)  
NOMINAL INPUT  
Natural  
Liquid  
Propane  
Orifice  
Size†  
Natural Liquid  
Gas  
Orifice  
Size†  
Gas  
Propane  
Orifice Orifice  
Size† Size†  
0-610 m (0-2,000) 3.0 (31)  
610 m (2,000) 2.9 (32)  
914 m (3,000) 2.9 (32)  
1.22 km (4,000) 2.9 (32)  
1.52 km (5,000) 2.8 (33)  
1.83 km (6,000) 2.8 (34)  
2.13 km (7,000) 2.8 (35)  
2.44 km (8,000) 2.7 (36)  
2.74 km (9,000) 2.6 (37)  
3.05 km (10,000) 2.5 (38)  
3.35 km (11,000) 2.5 (39)  
3.66 km (12,000) 2.4 (40)  
3.96 km (13,000) 2.4 (41)  
4.27 km (14,000) 2.3 (42)  
2.4 (41)  
2.3 (42)  
2.3 (42)  
2.3 (42)  
2.2 (43)  
2.2 (43)  
2.1 (44)  
2.1 (44)  
2.0 (45)  
2.0 (46)  
1.9 (47)  
1.9 (47)  
1.9 (48)  
1.9 (48)  
3.2 (30) 2.5 (38)  
3.2 (30) 2.5 (39)  
3.0 (31) 2.4 (40)  
2.9 (32) 2.4 (41)  
2.8 (33) 2.3 (42)  
2.8 (34) 2.2 (43)  
2.8 (35) 2.2 (43)  
2.7 (36) 2.1 (44)  
2.6 (37) 2.1 (44)  
2.5 (38) 2.0 (45)  
2.5 (39) 2.0 (45)  
2.4 (40) 2.0 (46)  
2.4 (41) 1.9 (47)  
2.3 (42) 1.9 (47)  
*As the height above sea level increases, there is less oxygen.  
Therefore, heat input rate should be reduced at higher altitudes.  
†Orifice available through your local distributor.  
Integrated Gas Controller (IGC) Operation  
NOTE: The default value for the evaporator-fan motor ON and  
OFF delay is 45 seconds. The Integrated Gas Controller (IGC)  
modifies this value when abnormal limit switch cycles occur.  
Based upon unit operating conditions, the ON delay can be  
reduced to 0 seconds and the OFF delay can be extended to  
180 seconds.  
When one flash of the LED (light-emitting diode) is ob-  
served, the evaporator-fan ON/OFF delay has been modified.  
If the limit switch trips at the start of the heating cycle during  
the evaporator ON delay, the time period of the ON delay for  
the next cycle will be 5 seconds less than the time at which the  
switch tripped. (Example: If the limit switch trips at 30 sec-  
onds, the evaporator-fan ON delay for the next cycle will occur  
at 25 seconds.) To prevent short-cycling, a 5-second reduction  
will only occur if a minimum of 10 minutes has elapsed since  
the last call for heating.  
The evaporator-fan OFF delay can also be modified. Once  
the call for heating has ended, there is a 10-minute period dur-  
ing which the modification can occur. If the limit switch trips  
during this period, the evaporator-fan OFF delay will increase  
by 15 seconds on the next cycle. A maximum of 9 trips can oc-  
cur, extending the evaporator-fan OFF delay to 180 seconds.  
To restore the original default value, reset the power to the unit.  
When the outdoor-air temperature is below the OAT setting  
and the thermostat calls for cooling, the economizer dampers  
move to the minimum position. If the supply-air temperature is  
above 14 C (57 F), the damper continues to open until it reach-  
es the fully open position or until the supply-air temperature  
drops below 11 C (52 F).  
When the supply-air temperature falls to between 14 C  
(57 F) and 11 C (52 F), the damper will remain at an intermedi-  
ate open position. If the supply-air temperature falls below  
11 C (52 F), the damper will modulate closed until it reaches  
the minimum position or until the supply-air temperature is  
above 11 C (52 F). When the thermostat is satisfied, the damp-  
er will move to the fully closed position when using an auto fan  
or to the minimum position when using a continuous fan.  
TO SHUT OFF UNIT — Set system selector switch at OFF  
position. Resetting heating selector lever below room tempera-  
ture will shut unit off temporarily until space temperature falls  
below thermostat setting.  
35  
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If the outdoor air alone cannot satisfy the cooling require-  
ments of the conditioned space, economizer cooling is integrat-  
ed with mechanical cooling, providing second-stage cooling.  
Compressor no. 1 and the condenser fan will be energized and  
the position of the economizer damper will be determined by  
the supply-air temperature. Compressor no. 2 is locked out.  
SERVICE  
When servicing unit, shut off all electrical power to unit to  
avoid shock hazard or injury from rotating parts.  
When the second stage of cooling is satisfied, the compres-  
sor and OFM will be deenergized. The damper position will be  
determined by the supply-air temperature.  
After a 30-second delay, the IFM shuts off. If the thermostat  
fan selector switch is in the ON position, the IFM will run  
continuously.  
Cleaning — Inspect unit interior at the beginning of each  
heating and cooling season or more frequently as operating  
conditions require.  
EVAPORATOR COIL — Clean coil as required. Inspect coil  
at beginning of heating and cooling seasons.  
1. Turn unit power off. Remove evaporator coil access panel.  
COOLING UNITS WITH ECONOMI$ER — When the  
OAT is above the ECON SP set point and the room thermostat  
calls for Stage 1 cooling (R to G + Y1), the indoor fan motor  
(IFM) is energized and the EconoMi$er damper modulates to  
minimum position. The compressor contactor is energized to  
start the compressor and outdoor-fan motor (OFM). After the  
thermostat is satisfied, the damper modulates to the fully closed  
position when the IFM is deenergized.  
2. If economizer is installed, remove economizer by discon-  
necting Molex plug and removing economizer mounting  
screws. Refer to Accessory Economizer Installation In-  
structions or Optional Economizer sections on pages 12  
and 15 for more details.  
3. Remove filters from unit.  
4. Clean coil using a commercial coil cleaner or dishwasher  
detergent in a pressurized spray canister. Wash both sides  
of coil and flush with clean water. For best results, back-  
flush toward return-air section to remove foreign materi-  
al. Caution should be taken as to not overflow the evapo-  
rator drain condensate pan.  
5. Flush condensate pan after completion.  
6. Reinstall economizer and filters.  
7. Reconnect wiring.  
When the OAT is below the ECON SP setting and the room  
thermostat calls for Stage 1 cooling (R to G + Y1), the  
EconoMi$er modulates to the minimum position when the  
IFM is energized. The EconoMi$er provides Stage 1 of cooling  
by modulating the return and outdoor air dampers to maintain a  
13 C (55 F) supply air set point. If the supply-air temperature  
(SAT) is greater than 14 C (57 F), the EconoMi$er modulates  
open, allowing a greater amount of outdoor air to enter the unit.  
If the SAT drops below 12 C (53 F), the outdoor air damper  
modulates closed to reduce the amount of outdoor air. When  
the SAT is between 12 C (53 F) and 14 C (57 F), the  
EconoMi$er maintains its position.  
If outdoor air alone cannot satisfy the cooling requirements  
of the conditioned space, and the OAT is above the MECH  
CLG LOCKOUT set point, the EconoMi$er integrates free  
cooling with mechanical cooling. This is accomplished by the  
strategies below.  
8. Replace access panels.  
CONDENSER COIL — Inspect coil monthly. Clean con-  
denser coil annually, and as required by location and outdoor-  
air conditions.  
One-Row Coils — Wash coil with commercial cleaner. Clean  
outer surfaces with a stiff brush in the normal manner. It is not  
necessary to remove top panel.  
NOTE: Compressors have a two-minute Minimum On, Mini-  
mum Off, and interstage delay timer.  
2-Row Coils — Clean coil as follows:  
1. Turn off unit power.  
1. If Y1 is energized, and the room thermostat calls for Y2  
(2-stage thermostat), the compressor and OFM are ener-  
gized. The position of the EconoMi$er damper is main-  
tained at its current value.  
2. If Y1 is energized for more than 20 minutes, and Y2 is  
not energized (whether or not a 2-stage thermostat is  
used), the compressor and OFM are energized. The posi-  
tion of the EconoMi$er damper is maintained at its cur-  
rent value.  
2. Remove top panel screws on condenser end of unit.  
3. Remove condenser coil corner post. See Fig. 45. To hold  
top panel open, place coil corner post between top panel  
and center post. See Fig. 46.  
4. Remove screws securing coil to center post.  
5. Remove fastener holding coil sections together at return  
end of condenser coil. Carefully separate the outer coil  
section 3 to 4 in. from the inner coil section. See Fig. 47.  
6. Use a water hose or other suitable equipment to flush  
down between the 2 coil sections to remove dirt and de-  
bris. Clean the outer surfaces with a stiff brush in the nor-  
mal manner.  
7. Secure inner and outer coil rows together with a field-  
supplied fastener.  
8. Reposition the outer coil section and remove the coil cor-  
ner post from between the top panel and center post.  
9. Reinstall the coil corner post and replace all screws.  
CONDENSATE DRAIN — Check and clean each year at  
start of cooling season. In winter, keep drain dry or protect  
against freeze-up.  
FILTERS — Clean or replace at start of each heating and cool-  
ing season, or more often if operating conditions require it. Re-  
placement filters must be same dimensions as original filters.  
BELTS — Adjust belt tension and pulley alignment at least  
twice a year or more frequently as operating conditions require.  
Refer to Step 9 — Adjust Evaporator for Fan Speed  
for procedures.  
3. If Y1 is energized, and compressor no. 1 is already ener-  
gized (see Step 2) and the room thermostat calls for Y2,  
compressor no. 1 continues to operate. If Y2 remains  
energized for more than 20 minutes, compressor no. 2 is  
energized.  
NOTE: Compressor no. 2 cannot be energized unless there is a  
signal for Y2 from the space thermostat.  
4. If compressor no. 2 is energized, and the Y2 signal from  
the thermostat is satisfied, compressors 1 and 2 are deen-  
ergized. Re-asserting Y2 will start compressor no. 1 and  
(after a 20-minute interstage delay) compressor no. 2.  
5. If compressor no. 1 is energized and the thermostat is sat-  
isfied, compressor no. 1, the OFM, and IFM are deener-  
gized and the EconoMi$er modulates closed.  
When the OAT is below the MECH CLG LOCKOUT set  
point, the compressors remain off.  
36  
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Lubrication  
COMPRESSORS — Each compressor is charged with the  
correct amount of oil at the factory.  
FAN-MOTOR BEARINGS — Fan-motor bearings are of  
the permanently lubricated type. No further lubrication is re-  
quired. No lubrication of condenser- or evaporator-fan motors  
is required.  
Condenser-Fan Adjustment (Fig. 48)  
1. Shut off unit power supply and tag disconnect.  
2. Remove condenser-fan assembly (grille, motor, motor  
cover, and fan) and loosen fan hub setscrews.  
3. Adjust fan height as shown in Fig. 48.  
4. Tighten setscrews and replace condenser-fan assembly.  
Fig. 45 — Cleaning Condenser Coil  
48TF UNIT VOLTAGE  
400 V  
FAN HEIGHT “A” (in.)  
89 (3.50)  
Fig. 48 — Condenser-Fan Adjustment  
Manual Outdoor-Air Damper — If outdoor-air damp-  
er blade is required, see Manual Outdoor-Air Damper section on  
page 12.  
Economizer Adjustment — Refer to Optional Dura-  
blade Economizer section on page 14.  
Condenser Coil Grille — Condenser coil grille is  
Fig. 46 — Propping Up Top Panel  
shipped factory-installed. No adjustments are required.  
Refrigerant Charge — Amount of refrigerant charge is  
listed on unit nameplate (also refer to Tables 1A and 1B). Refer  
to Carrier GTAC 2-5 Charging, Recovery, recycling, and recla-  
mation training manual and the following procedures.  
Unit panels must be in place when unit is operating during  
charging procedure.  
NO CHARGE — Use standard evacuating techniques. After  
evacuating system, weigh in the specified amount of refriger-  
ant (refer to Tables 1A and 1B).  
LOW CHARGE COOLING — Using the Cooling Charging  
Charts, Fig. 49-51 vary refrigerant until the conditions of the  
appropriate chart are met. Note the charging charts are differ-  
ent from the type normally used. The charts are based on  
charging the units to the correct superheat for the various oper-  
ating conditions. Accurate pressure gage and temperature sens-  
ing device are required. Connect the pressure gage to the  
service port on the suction line. Mount the temperature sensing  
device on the suction line and insulate it so that outdoor ambi-  
ent temperature does not affect the reading. Indoor-air cfm  
must be within the normal operating range of the unit.  
TO USE COOLING CHARGING CHARTS — Take the out-  
door ambient temperature and read the suction pressure gage.  
Refer to appropriate chart to determine what suction tempera-  
ture should be. If suction temperature is high, add refrigerant.  
If suction temperature is low, carefully reclaim some of the  
charge. Recheck the suction pressure as charge is adjusted.  
Example (Fig. 51, Circuit 1):  
Fig. 47 — Separating Coil Sections  
Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . .13 C (55 F)  
Suction Pressure. . . . . . . . . . . . . . . . . . . . . . . .483 kPa (70 psig)  
Suction Temperature should be. . . . . . . . . . . . . . . . .23 C (74 F)  
(Suction temperature may vary ± 3 C [5 F].)  
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Fig. 49 — Cooling Charging Charts, 48TF008 Units  
Fig. 50 — Cooling Charging Charts, 48TF012 Units  
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CIRCUIT NO. 2  
CIRCUIT NO. 1  
Fig. 51 — Cooling Charging Chart; 48TF014 Units  
Flue Gas Passageways — To inspect the flue collec-  
problems when the power supply is interrupted. When a break  
in power occurs, the module will be reset (resulting in a loss of  
fault history) and the indoor (evaporator) fan ON/OFF times  
will be reset. For additional information, refer to the Start-Up,  
Heating section on page 34. The LED error code can be ob-  
served through the viewport. During servicing refer to the label  
on the control box cover or Table 25 for an explanation of LED  
error code descriptions.  
tor box and upper areas of the heat exchanger:  
1. Remove the combustion blower wheel and motor assem-  
bly according to directions in Combustion-Air Blower  
section below.  
2. Remove the flue cover to inspect the heat exchanger.  
3. Clean all surfaces as required using a wire brush.  
If lockout occurs, unit may be adjusted by interrupting pow-  
er supply to unit for at least 5 seconds.  
Combustion-Air Blower — Clean periodically to as-  
sure proper airflow and heating efficiency. Inspect blower  
wheel every fall and periodically during heating season. For the  
first heating season, inspect blower wheel bimonthly to deter-  
mine proper cleaning frequency.  
Table 25 — LED Error Code Description*  
To inspect blower wheel, shine a flashlight into draft hood  
opening. If cleaning is required, remove motor and wheel as  
follows:  
1. Slide burner access panel out.  
2. Remove the 6 screws that attach induced-draft motor  
housing to vestibule plate (Fig. 52).  
3. The blower wheel can be cleaned at this point. If addi-  
tional cleaning is required, continue with Steps 4 and 5.  
4. To remove blower from the motor shaft, remove  
2 setscrews.  
5. To remove motor, remove the 4 screws that hold blower  
housing to mounting plate. Remove the motor cooling fan  
by removing one setscrew. Then remove nuts that hold  
motor to mounting plate.  
LED INDICATION  
ON  
ERROR CODE DESCRIPTION  
Normal Operation  
Hardware Failure  
Evaporator Fan On/Off Delay Modified  
Limit Switch Fault  
Flame Sense Fault  
4 Consecutive Limit Switch Faults  
Ignition Lockout Fault  
Induced-Draft Motor Fault  
Rollout Switch Fault  
Internal Control Fault  
Temporary 1 hour automatic reset fault  
OFF  
1 Flash†  
2 Flashes  
3 Flashes  
4 Flashes  
5 Flashes  
6 Flashes  
7 Flashes  
8 Flashes  
9 Flashes**  
LEGEND  
LED  
—
Light-Emitting Diode  
6. To reinstall, reverse the procedure outlined above.  
*A 3-second pause exists between LED error code flashes. If more  
than one error code exists, all applicable codes will be displayed in  
numerical sequence.  
†Indicates a code that is not an error. The unit will continue to oper-  
ate when this code is displayed.  
**Indicates internal processor fault and will reset itself in 1 hour.  
Limit Switch — Remove blower access panel (Fig. 6).  
Limit switch is located on the fan deck.  
Burner Ignition — Unit is equipped with a direct spark  
ignition 100% lockout system. Integrated Gas Unit Controller  
(IGC) is located in the control box (Fig. 11). Module contains a  
self-diagnostic LED (light-emitting diode). A single LED on  
the IGC provides a visual display of operational or sequential  
IMPORTANT: Refer to Troubleshooting Tables 26-30 for addi-  
tional information.  
39  
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Main Burners — At the beginning of each heating sea-  
son, inspect for deterioration, blockage due to corrosion or oth-  
er causes. Observe the main burner flames and replace burners  
if necessary.  
INDUCED-  
DRAFT  
ROLLOUT  
SWITCH  
MOTOR  
MOUNTING  
PLATE  
When working on gas train, do not hit or plug orifice  
spuds.  
BURNER  
SECTION  
FLUE  
EXHAUST  
REMOVAL AND REPLACEMENT OF GAS TRAIN  
(Fig. 52 and 53)  
VESTIBULE  
PLATE  
1. Shut off manual gas valve.  
INDUCED-  
DRAFT  
2. Shut off power to unit and tag disconnect.  
3. Slide out burner section side panel (not shown).  
4. Disconnect gas piping at unit gas valve.  
5. Remove wires connected to gas valve. Mark each wire.  
BLOWER  
HOUSING  
MOTOR  
MANIFOLD  
PRESSURE  
TAP  
GAS  
VALVE  
6. Remove wires from ignitor and sensor wires at the Inte-  
grated Gas Unit Controller (IGC).  
Fig. 52 — Burner Section Details  
7. Remove the 2 screws that attach the burner rack to the  
vestibule plate.  
8. Slide the burner tray out of the unit (Fig. 53).  
9. To reinstall, reverse the procedure outlined above.  
CLEANING AND ADJUSTMENT  
1. Remove burner rack from unit as described in Removal  
and Replacement of Gas Train section on this page.  
2. Inspect burners; if dirty, remove burners from rack.  
3. Using a soft brush, clean burners and cross-over port as  
required.  
4. Adjust spark gap. See Fig. 54.  
5. Reinstall burners on rack.  
6. Reinstall burner rack as described in Removal and Re-  
placement of Gas Train section.  
Fig. 53 — Burner Tray Details  
Replacement Parts — A complete list of replacement  
parts may be obtained from any Carrier distributor upon  
request.  
40  
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48TFD008  
31.4/21.1 kW INPUT (107,000/72,000 BTUH)  
48TFE008, 48TFD012  
50.4/31.9 kW INPUT/ (172,000/109,000 BTUH)  
48TFD014, 48TFE012, 48TFF008  
59.8/39.8 kW INPUT  
(204,000/136,000 BTUH)  
48TFE014, 48TFF012  
65.6/43.9 kW INPUT  
(224,000/150,000 BTUH)  
NOTE: Dimensions in ( ) are millimeters.  
Fig. 54 — Spark Gap Adjustment  
41  
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TROUBLESHOOTING  
Table 26 — LED Error Code Service Analysis  
CAUSE  
PROBLEM  
REMEDY  
Hardware failure.  
(LED OFF)  
Loss of power to control module (IGC).  
Check 5- amp fuse on IGC, power to unit, 24-v circuit breaker,  
and transformer. Units without a 24-v circuit breaker have an  
internal overload in the 24-v transformer. If the overload trips,  
allow 10 minutes for automatic reset.  
Limit switch fault.  
(LED 2 flashes)  
High temperature limit switch is open.  
Check the operation of the indoor (evaporator) fan motor.  
Ensure that the supply-air temperature rise is in accordance with  
the range on the unit nameplate.  
Flame sense fault.  
(LED 3 flashes)  
The IGC sensed flame that should not be Reset unit. If problem persists, replace control board.  
present.  
4 consecutive limit switch trips. Inadequate airflow to unit.  
(LED 4 flashes)  
Check operation of indoor (evaporator) fan motor and that supply-air  
temperature rise agrees with range on unit nameplate information.  
Ignition lockout.  
(LED 5 flashes)  
Unit unsuccessfully attempted ignition for Check ignitor and flame sensor electrode spacing, gaps, etc.  
15 minutes.  
Ensure that flame sense and ignition wires are properly termi-  
nated. Verify that unit is obtaining proper amount of gas.  
Induced-draft motor fault.  
(LED 6 flashes)  
IGC does not sense that induced-draft  
motor is operating.  
Check for proper voltage. If motor is operating, check the  
speed sensor plug/IGC Terminal J2 connection. Proper  
connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.  
Rollout switch fault.  
(LED 7 flashes)  
Rollout switch has opened.  
Rollout switch will automatically reset, but IGC will continue to  
lock out unit. Check gas valve operation. Ensure that induced-  
draft blower wheel is properly secured to motor shaft. Reset unit  
at unit disconnect.  
Internal control fault.  
(LED 8 flashes)  
Microprocessor has sensed an error in  
the software or hardware.  
If error code is not cleared by resetting unit power, replace the  
IGC.  
Temporary 1 hour automatic reset Stray radio frequency signals in ??  
fault. (LED 9 flashes)  
Processor will be reset after 1 hour.  
LEGEND  
IMPORTANT: Refer to Table 28 — Heating Service Trouble-  
shooting for additional troubleshooting information.  
IGC — Integrated Gas Unit Controller  
LED — Light-Emitting Diode  
If the IGC must be replaced, be sure to ground yourself to dissi-  
pate any electrical charge that may be present before handling  
new control board. The IGC is sensitive to static electricity and  
may be damaged if the necessary precautions are not taken.  
42  
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Table 27 — Cooling Service Troubleshooting  
PROBLEM  
CAUSE  
REMEDY  
Call power company.  
Replace fuse or reset circuit breaker.  
Replace component.  
Compressor and  
condenser fan  
will not start.  
Power failure.  
Fuse blown or circuit breaker tripped.  
Defective thermostat, contactor, transformer,  
or control relay.  
Insufficient line voltage.  
Incorrect or faulty wiring.  
Thermostat setting too high.  
Faulty wiring or loose connections in com-  
pressor circuit.  
Determine cause and correct.  
Check wiring diagram and rewire correctly.  
Lower thermostat setting below room temperature.  
Check wiring and repair or replace.  
Compressor will not start  
but condenser fan runs.  
Compressor motor burned out, seized, or  
internal overload open.  
Defective run/start capacitor, overload, or  
start relay.  
Determine cause. Replace compressor.  
Determine cause and replace.  
One leg of 3-phase power dead.  
Replace fuse or reset circuit breaker. Determine  
cause.  
Compressor cycles (other than  
normally satisfying thermostat).  
Refrigerant overcharge or undercharge.  
Recover refrigerant, evacuate system, and  
recharge to nameplate.  
Defective compressor.  
Insufficient line voltage.  
Blocked condenser.  
Defective run/start capacitor, overload, or  
start relay.  
Replace and determine cause.  
Determine cause and correct.  
Determine cause and correct.  
Determine cause and replace.  
Defective thermostat.  
Replace thermostat.  
Faulty condenser-fan motor or capacitor.  
Restriction in refrigerant system.  
Dirty air filter.  
Replace.  
Locate restriction and remove.  
Replace filter.  
Compressor operates continuously.  
Unit undersized for load.  
Thermostat set too low.  
Low refrigerant charge.  
Leaking valves in compressor.  
Air in system.  
Decrease load or increase unit size.  
Reset thermostat.  
Locate leak, repair, and recharge.  
Replace compressor.  
Recover refrigerant, evacuate system, and  
recharge.  
Condenser coil dirty or restricted.  
Dirty air filter.  
Clean coil or remove restriction.  
Replace filter.  
Excessive head pressure.  
Dirty condenser coil.  
Refrigerant overcharged.  
Air in system.  
Clean coil.  
Remove excess refrigerant.  
Recover refrigerant, evacuate system, and  
recharge.  
Condenser air restricted or air short-cycling.  
Low refrigerant charge.  
Compressor valves leaking.  
Restriction in liquid tube.  
High heat load.  
Compressor valves leaking.  
Refrigerant overcharged.  
Dirty air filter.  
Determine cause and correct.  
Check for leaks, repair, and recharge.  
Replace compressor.  
Remove restriction.  
Check for source and eliminate.  
Replace compressor.  
Head pressure too low.  
Excessive suction pressure.  
Suction pressure too low.  
Recover excess refrigerant.  
Replace filter.  
Low refrigerant charge.  
Metering device or low side restricted.  
Insufficient evaporator airflow.  
Check for leaks, repair, and recharge.  
Remove source of restriction.  
Increase air quantity. Check filter and replace if  
necessary.  
Temperature too low in conditioned area.  
Field-installed filter drier restricted.  
Unit in economizer mode.  
Reset thermostat.  
Replace.  
Proper operation; no remedy necessary.  
Compressor no. 2 will not run.  
Compressor makes excessive  
noise (48TF014 scroll only).  
Compressor rotating in wrong direction.  
Reverse the 3-phase power load as described in  
Start-Up, Compressor Rotation section on  
page 34.  
43  
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Table 28 — Heating Service Troubleshooting  
PROBLEM  
CAUSE  
REMEDY  
Burners will not  
ignite.  
Misaligned spark electrodes.  
Check flame ignition and sensor electrode positioning.  
Adjust as needed.  
No gas at main burners.  
Check gas line for air purge as necessary. After purging  
gas line of air, allow gas to dissipate for at least 5 minutes  
before attempting to relight unit.  
Check gas valve.  
Water in gas line.  
Drain water and install drip leg to trap water.  
Check power supply, fuses, wiring, and circuit breaker.  
No power to furnace.  
No 24 v power supply to control circuit.  
Check transformer. Transformers with internal overcurrent  
protection require a cool down period before resetting.  
Miswired or loose connections.  
Burned-out heat anticipator in thermostat.  
Broken thermostat wires.  
Dirty air filter.  
Check all wiring and wirenut connections.  
Replace thermostat.  
Run continuity check. Replace wires, if necessary.  
Clean or replace filter as necessary.  
Inadequate heating.  
Gas input to unit too low.  
Check gas pressure at manifold. Clock gas meter for input. If too  
low, increase manifold pressure, or replace with correct orifices.  
Unit undersized for application.  
Restricted airflow.  
Replace with proper unit or add additional unit.  
Clean filter, replace filter, or remove any restrictions.  
Blower speed too low.  
Use high speed tap, increase fan speed, or install optional  
blower, as suitable for individual units.  
Limit switch cycles main burners.  
Too much outdoor air.  
Check rotation of blower, thermostat heat anticipator settings,  
and temperature rise of unit. Adjust as needed.  
Adjust minimum position.  
Check economizer operation.  
Poor flame  
characteristics.  
Incomplete combustion (lack of  
combustion air) results in:  
Check all screws around flue outlets and burner compartment.  
Tighten as necessary.  
Aldehyde odors, CO, sooting flame, or floating flame. Cracked heat exchanger.  
Overfired unit — reduce input, change orifices, or adjust  
gas line or manifold pressure.  
Check vent for restriction. Clean as necessary.  
Check orifice to burner alignment.  
Burners will not  
turn off.  
Unit is locked into Heating mode for a  
one minute minimum.  
Wait until mandatory one minute time period has  
elapsed or power to unit.  
Table 29 — EconoMi$er Troubleshooting  
PROBLEM  
POTENTIAL CAUSE  
REMEDY  
Damper Does Not  
Open  
Indoor (Evaporator) Fan is Off  
Check to ensure that 24 vac is present at Terminal C1 (Common Power)  
on the IFC (Indoor [Evaporator] Fan Contactor) or that 24 vac is present at  
the IFO (Indoor [Evaporator] Fan On) terminal. Check whether 24 vac is  
present at PL6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is not  
present, check wiring (see unit label diagram).  
Check proper thermostat connection to G on the connection board.  
No Power to EconoMi$er Controller  
Check to ensure that 24 vac is present across Terminals 24 VAC and  
24 V COM on the EconoMi$er control. If 24 vac is not present, check wiring  
(see unit label diagram). If 24 vac is present, STATUS light should be on  
constantly.  
No Power to G Terminal  
Controller Fault  
If IFM is on, check to ensure 24 vac is present on G Terminal of the  
EconoMi$er controller. If 24 vac is not present, check wiring (see unit  
label diagram).  
If STATUS light is flashing one flash, the EconoMi$er controller is  
experiencing a fault condition. Cycle power to the controller. If condition  
continues, replace the EconoMi$er controller.  
Thermostat Fault  
If STATUS light is flashing two flashes, the EconoMi$er controller senses  
the thermostat is wired incorrectly. Check wiring between the thermostat  
and the connection board in the electrical panel. The fault condition is  
caused by Y2 being energized before Y1.  
Actuator Fault  
Check the wiring between the EconoMi$er controller and the actuator.  
Hold CONFIG button between 3 and 10 seconds to verify the  
actuator’s operation. (This process takes 3 minutes to complete.)  
EconoMi$er  
Operation Limited to  
Minimum Position  
Minimum Position Set Incorrectly  
Verify that the MIN POS (%) is set greater than zero. Adjust MIN POS (%)  
to 100% to verify operation, and then set to correct setting.  
Set at correct value. See Table 4.  
EconoMi$er Changeover Set Point Set Too  
High or Too Low  
Supply Air Temperature Sensor Faulty  
Outdoor Air Temperature Sensor Faulty  
Supply Air Low Limit Strategy Controlling  
If STATUS light is flashing 4 flashes, Supply Air Temperature Sensor is  
faulty. Check wiring or replace sensor.  
If STATUS light is flashing 5 flashes, Outdoor Air Temperature Sensor is  
faulty. Check wiring or replace sensor.  
The supply-air temperature is less than 7 C (45 F), causing the minimum  
position to be decreased. Refer to the Start-Up instructions. Verify correct  
setting of MIN POS (%). If correct, EconoMi$er is operating correctly.  
Damper Position  
Less than Minimum  
Position Set Point  
Damper Does Not  
Return to Minimum  
Position  
Damper Does Not  
Close on Power Loss  
CO2 Ventilation Strategy Controlling  
Damper Travel is Restricted  
If a CO2 sensor is being used, and the damper position is greater than  
minimum position, the ventilation control strategy is controlling. Refer to  
the Start-Up instructions. EconoMi$er is operating correctly.  
Check to ensure the damper is not blocked.  
LEGEND  
IFM — Indoor Fan Motor  
PL  
—
Plug  
44  
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Table 30 — Durablade Economizer Troubleshooting  
PROBLEM  
CAUSE  
REMEDY  
Damper does not  
open.  
Indoor (evaporator) fan is off.  
1. Check to ensure that 24 vac is present at terminal C1 on the IFC or  
that 24 vac is present at the IFO terminal. Check whether 24 vac is  
present at PL6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is  
not present, check wiring (see unit label diagram).  
2. Check proper thermostat connection to G on the connection board.  
No power to economizer motor.  
1. Check that SW3 is properly making contact with the damper  
blade. Check that SW1 is in the NC (normally closed) position.  
2. Check diode D1. If diode is not functioning properly, replace D1.  
3. Confirm that the economizer control board is grounded properly at  
PL6-4 (brown wire) and at brown terminal of the economizer control  
board (brown wire). The economizer motor must also be grounded  
properly at the negative motor terminal (brown wire).  
4. Verify SW1 and SW3 are working and wired properly (see unit label  
diagram).  
5. Check for 24 vac input at both PL6-1 (red wire) and PL6-3 (black  
wire). If 24 vac not present, check unit wiring (see unit label dia-  
gram). If 24 vac is found in both places, check for 24 vac at the  
yellow terminal of the economizer control board (yellow wire). If  
24 vac power is not present, replace the economizer control board.  
Economizer motor failure.  
OAT or EC set too high.  
If the indoor (evaporator) fan and economizer motor are energized,  
verify that there is a minimum of 18 vdc at the positive motor  
terminal. If the motor is not operating, replace the motor.  
1. Set at correct temperature (1.7 C [3 F] below indoor space  
temperature).  
2. Check OAT or EC by setting above outdoor temperature or humidity  
level. If the OAT or EC switches do not close, replace OAT or EC.  
Economizer  
operation  
limited to minimum  
position.  
Verify economizer control board is 1. Perform the following tests when OAT or EC is closed, Y1 is called  
correctly wired and works properly.  
for and damper is at minimum position. Confirm 24 vac on gray ter-  
minal of the economizer control board (gray wire). If 24 vac is not  
present, check wiring (see unit label diagram).  
2. Verify that SW1 and SW3 are wired correctly and working properly  
(see unit label diagram).  
3. Check to ensure that 24 vac exists at PL6-2 (blue wire). If  
24 vac is not present, check wiring (see unit wiring label diagram).  
4. Check 24 vac output at PL6-10 (white wire). If 24 vac is not  
present, replace economizer control board.  
Check SAT.  
1. After verifying that the OAT and EC settings and the economizer  
control board wiring are correct, check to ensure that the 24 vac  
terminal of the SAT has 24 vac (white wire). If OAT, EC, and control  
board are functioning and wired properly and no 24 vac exists,  
check wiring (see unit label diagram).  
2. If supply-air temperature is greater than 14 C (57 F), 24 vac should  
be found at terminal T2 on the SAT (pink wire). If 24 vac is not  
present, replace SAT.  
Damper does not  
close.  
Incorrect wiring of economizer.  
1. Verify that SW2 and SW4 are wired and working properly (see unit  
label diagram).  
2. Check diode D2. If diode is not functioning properly, replace D2.  
Verify economizer control board is 1. After verifying that the wiring is correct, modulate the damper to the  
functioning properly.  
minimum position. Remove the call for G (evaporator fan).  
2. If the damper does not move, check for 24 vac at PL6-1 (red wire).  
If 24 vac is not present, check wiring (see unit label diagram).  
3. If damper still does not move, check for 24 vac at blue terminal of  
economizer control board (blue wire). If 24 vac is not present,  
replace the economizer circuit board.  
Check SAT.  
1. After verifying that the wiring is correct and the economizer control  
board is functioning properly, place the OAT or EC switch in the  
closed position. Place a call for Y1 and open the damper to the fully  
open position. Confirm that the 24 vac terminal of the SAT has  
24 vac (white wire). If 24 vac is not present, check wiring (see unit  
label diagram).  
2. If supply-air temperature is less than 11 C (52 F), 24 vac should be  
found at terminal T1 on the SAT (violet wire). If 24 vac not found,  
replace SAT.  
Economizer motor failure.  
If economizer control board and SAT are functioning properly, verify  
that there is a minimum of 18 vdc at the positive motor terminal. If a  
minimum if 18 vdc is present and the motor is still not operating,  
replace the motor.  
Economizer damper Verify that close-on-power-loss and 1. Check voltage potential across batteries. If lower than 14 vdc,  
does not close on  
power loss.  
economizer control board are func-  
tioning properly.  
replace close-on-power-loss power supply (9-v alkaline batteries). It  
is recommended that you check this emergency power supply on a  
regular basis or whenever the filters are changed.  
2. If the close-on-power-loss and economizer control board are func-  
tioning properly, check for 14 vdc or higher at the blue terminal of  
the economizer control board (blue wire) when power is discon-  
nected from unit. If 14 vdc is not present, replace the control board.  
LEGEND  
C1 — Common Power  
OAT — Outdoor-Air Thermostat  
EC — Enthalpy Control  
PL — Plug  
IFC — Indoor (Evaporator) Fan Contactor  
IFO — Indoor (Evaporator) Fan On  
SAT — Supply-Air Thermostat  
SW — Economizer Position Switch  
45  
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LEGEND  
AHA  
BR  
—
—
—
—
—
—
—
—
—
—
—
—
Adjustable Heat Anticipator  
Blower Relay  
C
Contactor, Compressor  
Capacitor  
CAP  
CB  
Circuit Breaker  
CC  
Cooling Compensator  
Compressor Motor  
Combustion Relay  
Diode  
COMP  
CR  
D
EC  
Enthalpy Control  
Economizer  
ECON  
EPS  
Emergency Power Supply  
(9-Volt Battery)  
EQUIP  
ER  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Equipment  
Economizer Relay  
Freeze-Up Protection Thermostat  
Filter Status Sensor  
Ground  
FPT  
FSS  
GND  
GVR  
HPS  
HS  
Gas Valve Relay  
High-Pressure Switch  
Hall-Effect Sensor  
Ignitor  
I
IDM  
IFC  
Induced-Draft Motor  
Indoor-Fan Contactor  
Indoor Fan Motor  
Integrated Gas Unit Controller  
Low-Pressure Switch  
Limit Switch  
IFM  
IGC  
LPS  
LS  
MGV  
MTR  
OAT  
OFM  
P
Main Gas Valve  
Motor  
Outdoor-Air Thermostat  
Outdoor-Fan Motor  
Plug  
PL  
Plug Assembly  
QT  
Quadruple Terminal  
Relay  
R
RS  
Rollout Switch  
SAT  
SEN  
SW1  
SW2  
SW3  
SW4  
TC  
Supply-Air Thermostat  
Sensor  
Switch Fully Open  
Switch Fully Closed  
Switch Min. Vent Position  
Switch Max. Vent Position  
Thermostat-Cooling  
Thermostat-Heating  
Transformer  
TH  
TRAN  
Field Splice  
Marked Wire  
Terminal (Marked)  
Terminal (Unmarked)  
Terminal Block  
Splice  
Splice (Marked)  
Factory Wiring  
Field Control Wiring  
Field Power Wiring  
Accessory or Optional Wiring  
To indicate common potential  
only. Not to represent wiring.  
NOTES:  
1. If any of the original wire furnished must be replaced, it must be  
replaced with Type 90 C wire or its equivalent.  
2. Three-phase motors are protected under primary single phasing  
conditions.  
Thermostat: HH07AT170, 172, 174 and P272-2783  
Subbase:  
HH93AZ176, 178 and P272-1882, 1883  
3. Set heat anticipator for first stage at 0.14 amp, second stage at  
0.2 amp, except for 008 low heat, set both first and second stage at  
0.14 amp.  
4. Use copper conductors only.  
Fig. 55 — Typical Unit Wiring Schematic  
Copyright 2001 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 004-816 Printed in U.S.A. Form 48TF-C1SI Pg 46 1-01 Replaces: New  
Book 1  
4
Tab 1a 6a  
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START-UP CHECKLIST  
(Remove and Store in Job File)  
I. PRELIMINARY INFORMATION  
MODEL NO.:________________________________  
DATE:______________________________________  
SERIAL NO.: ___________________________________  
TECHNICIAN: __________________________________  
JOB LOCATION: _______________________________  
II. PRE-START-UP (insert checkmark in box as each item is completed)  
VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT  
REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS  
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS  
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS  
CHECK GAS PIPING FOR LEAKS  
CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE  
VERIFY THAT UNIT INSTALLATION IS LEVEL  
CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS  
AND DRIVE BELTS TENSION.  
III. START-UP  
ELECTRICAL  
SUPPLY VOLTAGE  
COMPRESSOR AMPS L1  
COMPRESSOR AMPS L1  
L1-L2  
L2-L3  
L2  
L2  
L3-L1  
L3  
L3  
INDOOR-FAN AMPS  
L1  
L2  
L3  
TEMPERATURES  
OUTDOOR-AIR TEMPERATURE  
RETURN-AIR TEMPERATURE  
COOLING SUPPLY AIR  
DB  
DB  
DB  
DB  
WB  
GAS HEAT SUPPLY AIR  
PRESSURES  
GAS INLET PRESSURE  
GAS MANIFOLD PRESSURE  
REFRIGERANT SUCTION  
kPa (IN. WG)  
kPa (IN. WG) (HI FIRE)  
Pa (PSIG) — CIRCUIT NO. 1  
Pa (PSIG) — CIRCUIT NO. 2  
REFRIGERANT DISCHARGE  
Pa (PSIG) — CIRCUIT NO. 1  
Pa (PSIG) — CIRCUIT NO. 2  
VERIFY REFRIGERANT CHARGE USING CHARGING TABLES  
VERIFY THAT 3-PHASE SCROLL COMPRESSOR ROTATING IN CORRECT DIRECTION (014 ONLY)  
Copyright 2001 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book  
1
4
Catalog No. 004-816  
Printed in U.S.A.  
Form 48TF-C1SI  
Pg CL-1  
1-01  
Replaces: New  
Tab  
1a 6a  
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