installation, start-up and
service instructions
LIGHT COMMERCIAL
CONDENSING UNITS
538J
Sizes 018-060
Cancels: New
II 538J -18-1
1/15/02
CONTENTS
I. COMPLETE PRE-INSTALLATION CHECKS
A. Unpack Unit
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
Move unit to final location. Remove unit packaging being
careful not to damage service valves or grilles.
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
I. Complete Pre-Installation Checks . . . . . . . . . . . . . . 1
II. Rig and Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 3
III. Complete Refrigerant Piping Connections . . . . . . . 3
IV. Make Electrical Connections . . . . . . . . . . . . . . . . 4
V. Accessory Installation. . . . . . . . . . . . . . . . . . . . . . . . 4
B. Inspect Shipment
File claim with shipping company if shipment is damaged or
incomplete. Check unit nameplate to ensure unit matches
job requirements.
C. Consider System Requirements
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Consult local building codes and NEC for special installation
requirements.
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
I. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
II. Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
III. Cleaning Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Allow sufficient space for airflow clearance, wiring, refriger-
ant piping, and servicing unit. See Fig. 1 and 2. Unit can be
mounted on a level pad directly on base legs or mounted on
raised pads at support points. See Fig. 2 for center of gravity.
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install or service air-conditioning equipment.
Untrained personnel may perform basic maintenance such
as cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working on
air-conditioning equipment, observe safety precautions in
literature, and on tags and labels attached to unit.
C
O
O
LIN
G
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for brazing operations. Have a fire extin-
guisher available. Read these instructions thoroughly. Con-
sult local building codes and National Electrical Code (NEC,
U.S.A. Standard) for special installation requirements.
INSTALLATION
WARNING: Before installing or servicing system,
always turn off main power to system. There may be
more than one disconnect switch. Turn off accessory
heater power if applicable. Electrical shock can cause
personal injury.
Fig. 1 — Typical Condensing Unit
II. RIG AND MOUNT UNIT
A. Mounting on Ground
Mount unit on a solid, level concrete pad. Position unit so
water or ice from roof does not fall directly into unit. Field-
fabricated stacking kits can be used when units are to be
stacked. If conditions or local codes require unit to be fas-
tened to a pad, 6 field-supplied tiedown bolts should be used
and fastened through slots provided in unit mounting feet.
B. Mounting on Roof
Mount unit on level platform or frame at least 6 in. above
roof surface. Isolate unit and tubing from structure.
C. Rigging
CAUTION: Be sure unit panels are securely in
place prior to rigging.
Fig. 3 — Lifting Unit with Sling
Keep unit upright. Lift unit using sling. Use cardboard or
padding under sling, and spreader bars to prevent sling
damage to unit. See Fig. 3. See Fig. 2 for center of gravity ref-
erence. Install unit so coil does not face into prevailing
winds. If this is not possible and constant winds above
25 mph are expected, use field-fabricated wind baffle.
A. Check AccuRater® Control
The AccuRater refrigerant control is required for cooling sys-
tem capacity optimization. An AccuRater device with field-
replaceable piston should be supplied with the indoor unit.
Refer to AccuRater metering device table in separate indoor
unit installation instructions to determine the correct Accu-
Rater piston size required for the condenser/evaporator sys-
tem being installed.
NOTE: Accessory wind baffles should be used on all units
with accessory low-ambient control.
Field-fabricated snow stand may be used to raise unit when
operation will be required during the winter. Units may also
be wall mounted using the accessory wall mounting kit.
Note that one of 2 types of the AccuRater devices can be
used. Use Type A only if Type B is unavailable. See Fig. 4. Do
not interchange components between AccuRater device
types. Matching of outdoor unit with indoor unit may require
field replacement of piston. Replace piston, if required,
before connecting refrigerant lines. Piston replacement
instructions are included in the indoor unit installation
instructions. After system installation is complete, see
Refrigerant Charging section on page 8 to check and/or
adjust refrigerant charge.
III. COMPLETE REFRIGERATION PIPING CONNECTIONS
Outdoor units may be connected to indoor units using field-
supplied tubing of refrigerant grade and condition. See
Tables 1A and 1B for correct line sizes. Do not use less than
10 ft (3 m) of interconnecting tubing.
CAUTION: DO NOT BURY MORE THAN 36 IN.
(922 mm) OF REFRIGERANT PIPE IN THE
GROUND. If any section of pipe is buried, there must
be a 6 in. (154 m) vertical rise to the valve connections
on the outdoor unit. If more than the recommended
length is buried, refrigerant may migrate to the cooler,
buried section during extended periods of system shut-
down. This causes refrigerant slugging and could dam-
age compressor at start-up.
The 538J series units may also be installed with units using
a thermostatic expansion valve (TXV). If a TXV is used, be
sure to remove the piston from the indoor coil. See installa-
tion instructions shipped with the TXV for proper position-
ing and adjustment.
When more than 50 ft (15.2 m) of interconnecting tubing and
more than 30 ft (9.1 m) of vertical lift is used, refer to Part 3
of the System Design Manual for design details, or contact
your local distributor.
If either refrigerant tubing or indoor coil is exposed to atmo-
spheric conditions for longer than 5 minutes, it must be evac-
uated to 1000 microns to eliminate contamination and
moisture in the system.
TYPE A (FIELD-INSTALLED BYPASS TYPE)
Run refrigerant tubes as directly as possible, avoiding
unnecessary turns and bends. Suspend refrigerant tubes so
they do not damage insulation on vapor tube and do not
transmit vibration to the structure. Also, when passing
refrigerant tubes through the wall, seal opening so that
vibration is not transmitted to structure. Leave some slack
in refrigerant tubes between structure and outdoor unit to
absorb vibration. Refer to separate indoor unit installation
instructions for additional information.
TYPE B (RECOMMENDED)
NOTE: Arrow on AccuRater body points in free-flow direction, away
from the indoor coil.
Fig. 4 — AccuRater Metering Device Components
—3—
B. Make Piping Sweat Connections
switch, fuses, and field wiring must be in compliance with
NEC (U.S.A. Standard) and applicable local codes. Use mini-
mum 60 C wire for field power connection.
Remove plastic caps from liquid and suction service valves.
Use refrigerant grade tubing. Service valves are closed from
the factory and ready for brazing. After wrapping the service
valve with a wet cloth, the tubing set can be brazed to the
service valve using either silver bearing or non-silver bear-
ing brazing material. Consult local code requirements.
Refrigerant tubing and indoor coil are ready for leak testing.
Route power wires through opening in the unit side panel
and connect in unit control box as shown on unit label dia-
gram and Fig. 5 and 6. Unit must be grounded.
B. Control Circuit Wiring
Control voltage is 24 v. See Fig. 5 and unit label diagram for
field-supplied wiring details. Route control wire through
opening in the unit side panel to connection in unit control
box.
NOTE: Unit is shipped with a full factory charge of R-22
refrigerant as indicated on nameplate.
Pass nitrogen or other inert gas through piping while braz-
ing to prevent formation of copper oxide.
NOTE: For wire runs up to 50 ft (15 m), use no. 18 AWG
(American Wire Gage) insulated wire (35 C minimum). For
50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire. For
more than 75 ft (23 m), use no. 14 AWG insulated wire. See
Table 2 for conversion to European wire sizes.
CAUTION: To avoid damage while brazing, service
valves should be wrapped in a heat-sinking material
such as a wet cloth.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect any applicable warranty. See Table 3.
Do not install unit in system where voltage may fluctuate
above or below permissible limits.
CAUTION: When brazing tubing sets to the ser-
vice valves, a brazing shield must be used to prevent
damage to the painted unit surface.
See Table 3 for recommended fuse sizes. When making elec-
trical connections, provide clearance at unit for refrigerant
piping connections.
C. Provide Safety Relief
A fusible plug is located in unit suction line; do not cap this
plug. If local code requires additional safety devices, install
as directed.
Use indoor unit transformer as 24-v (40-va minimum) supply
for system as shown in Fig. 5 or use accessory transformer.
IV. MAKE ELECTRIAL CONNECTIONS
WARNING: Before performing service or mainte-
nance, be sure the indoor unit main power switch is off
and indoor blower has completely stopped. Failure to
do so may result in electrical shock or injury from
rotating fan blades.
WARNING: Unit cabinet must have an uninter-
rupted, unbroken electrical ground to minimize the
possibility of personal injury if an electrical fault
should occur. This ground may consist of electrical wire
connected to the unit ground lug in control compart-
ment, or conduit approved for electrical ground when
installed in accordance with NEC, ANSI/NFPA (Ameri-
can National Standards Institute/National Fire Protec-
tion Association) 70, and local electrical codes. Failure
to follow this warning could result in the installer
being liable for personal injury to others.
C. Connections to Duct-Free Fan Coil Units
The 538J units are designed for easy match-up to 619C,
619F, 619ENX018 and 619ENX024 duct-free fan coils. These
units provide 24-v power for the outdoor unit from the fan
coil. Connect the Y and C terminals of the indoor unit to the
blue and brown wires of the outdoor unit with 20 gage (mini-
mum) thermostat wire.
CAUTION: Unit failure as a result of operation on
improper line voltage or excessive phase imbalance
constitutes abuse and may cause damage to electrical
components. Such operation will invalidate any appli-
cable warranty.
V. ACCESSORY INSTALLATION
Install all unit accessories per accessory installation instruc-
tions prior to start-up.
Do not use accessory Time Guard® II device when combining
a 538J unit with 619E indoor units.
A. Power Wiring
When ambient temperature will fall below 55 F (13 C), acces-
sory low ambient controller (part no. 53DS900060) is
required. When accessory low ambient kit is used, unit
should also be equipped with accessory winter start kit and
field-fabricated wind baffles.
Unit is factory-wired for voltage shown on nameplate. Pro-
vide adequate, fused disconnect switch within sight of unit,
readily accessible but out of reach of children. Provision for
locking the switch open (off) is advisable to prevent power
from being turned on while unit is being serviced. Disconnect
—4—
Table 1A — Physical Data (English)
UNIT 538J
NOMINAL CAPACITY (Btuh)
UNIT OPERATING WEIGHT (lb)
018
18,000
130
024
24,000
136
030
30,000
161
036
36,000
185
048
48,000
222
060
60,000
249
COMPRESSOR
Type
Hermetic
Copeland
Scroll
ZR18KC-PFV
25/21
Copeland
Scroll
ZR24KC-PFV
25/21
Copeland
Scroll
Copeland
Scroll
Copeland
Scroll
ZR47KC-PFV
42/38
Copeland
Scroll
ZR57KC-PFV
56/52
Model
Oil (oz) Initial/Recharge
ZR28KC-PFV
38/34
ZR34KC-PFV
42/38
OUTDOOR FAN
Rpm
Propeller Type, Direct Drive, Horizontal
850
850
850
850
850
850
Diameter (in.)...No. of Blades
Fan Pitch (Deg)
Motor Hp
18...3
18...3
18...3
18...3
24...3
24...3
25
27
27
31
24
24
1
1
1
1
1
1
/
/
/
/
/
/
4
8
8
8
8
4
Nominal Airflow (Cfm)
1720
1720
1720
1720
3900
3900
OUTDOOR COIL
Face Area (sq ft)...No. of Rows
Fins per in.
Copper Tube, Aluminum Plate Fin
6.1...1
20
6.1...1.5
20
6.1...2
20
6.1...2
20
12.3...1.5
20
12.3...1.75
20
CONTROLS PRESSURESTAT SETTINGS
Low Pressure
Cutout (psig)
7
3
5
Cut-In (psig)
Fusible Plug
22
210 F
NOTE: Line sizes are for runs up to 25 feet.
Table 1B — Physical Data (SI)
UNIT 538J
NOMINAL CAPACITY (kW)
UNIT OPERATING WEIGHT (kg)
018
5.3
58.9
024
7.0
61.6
030
8.8
73.0
036
10.5
83.9
048
14.1
100.6
060
17.6
112.9
COMPRESSOR
Type
Hermetic
Copeland
Scroll
ZR18KC-PFV
.74/.62
Copeland
Scroll
ZR24KC-PFV
.74/.62
Copeland
Scroll
Copeland
Scroll
Copeland
Scroll
ZR47KC-PFV
1.25/1.13
Copeland
Scroll
ZR57KC-PFV
1.66/1.54
Model
Oil (L) Initial/Recharge
ZR28KC-PFV
1.13/1.00
ZR34KC-PFV
1.25/1.13
OUTDOOR FAN
R/s
Propeller Type, Direct Drive, Horizontal
14.2
457...3
25
14.2
457...3
27
14.2
457...3
27
14.2
457...3
31
14.2
610...3
24
14.2
610...3
24
Diameter (mm)...No. of Blades
Fan Pitch (Deg)
Motor kW
.13
.09
.09
812
.09
.19
.19
Nominal Airflow (L/s)
812
812
812
1840
1840
OUTDOOR COIL
Copper Tube, Aluminum Plate Fin
2
Face Area (m )...No. of Rows
.57...1
.8
.57...1.5
.8
.57...2
.8
.57...2
.8
1.14...1.5
.8
1.14...1.75
.8
Fins per mm
CONTROLS PRESSURESTAT SETTINGS
Low Pressure
Cutout (kPa)
48 21
152 34
99 C
Cut-In (kPa)
Fusible Plug
NOTE: Line sizes are for runs up to 7.6 m.
—5—
LEGEND
*The IFR and IFM are located in indoor unit on heating-cooling applications. If accessory
IFR is required for cooling-only applications, locate (IFR) in fan coil.
NOTES:
1. Refer to unit wiring label for wire colors: BRN to BLU and C to Y connections.
2. Arrangement A, B and C are for use with residential fan coils.
C
— Contactor (12-va)
— Heating Control
— Indoor-Fan Motor
— Indoor-Fan Relay
HC
IFM
IFR
TRANS — Transformer
Field Wiring
Factory Wiring
Fig. 5 — Typical Control Circuit Connections
LEGEND
NEC — National Electrical Code
(U.S.A. Standard)
— Terminal Board
— Transformer
TB
Field Wiring
Factory Wiring
Fig. 6 — Line Power Connections
—6—
Table 2 — American/European Wire Conversions
SERVICE
AMERICAN
EUROPEAN
WARNING: Before performing recommended main-
tenance, be sure unit main power switch is off. Failure to
do so may result in electrical shock or injury from rotat-
ing fan blade.
Industry
Standard Size
American Conversion
Industry Standard
2
(mm)
Size (mm )
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
5.25
6.0
I. OUTDOOR FAN
6.36
10.0
16.0
25.0
—
A reinforced wire mount holds the outdoor fan assembly in
place. See Fig. 7 for proper mounting positions.
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
35.0
50.0
—
70.0
95.0
120.0
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
UNIT 538J DIMENSIONS — in. (mm)
AWG — American Wire Gage
kcmil — Thousand Circular Mils
018
0.433 (11)
024-036
0.709 (18)
048-060
0.16 (4)
START-UP
I. PRELIMINARY CHECKS
Fig. 7 — Condenser Fan Mounting Positions
II. HIGH-PRESSURE RELIEF VALVE
1. Check that all internal wiring connections are tight
and that barriers, covers, and panels are in place.
Valve is located in compressor. Relief valve opens at a
pressure differential of approximately 450 ± 50 psig (3100 ±
345 kPa) between suction (low side) and discharge (high
side) to allow pressure equalization.
2. Make certain field electrical power source agrees
with unit nameplate rating.
3. Open all service valves.
III. INTERNAL CURRENT AND TEMPERATURE SENSITIVE
OVERLOAD
II. LEAK TEST
Field piping and fan coil must be leak tested by the pressure
method. Use R-22 at approximately 25 psig (172 kPa) backed
up with an inert gas to a total pressure not to exceed
245 psig (1690 kPa).
Control resets automatically when internal compressor
motor temperature drops to a safe level (overloads may
require up to 45 minutes to reset). When an internal over-
load is suspected of being open, check by using an ohmmeter
or continuity tester.
III. EVACUATE AND DEHYDRATE
Field piping and fan coil must be evacuated and dehydrated.
IV. PUMPDOWN PROCEDURE
The system may be pumped down in order to make repairs
on low side without losing complete refrigerant charge.
IV. CHARGE SYSTEM
Release factory charge into system by opening (backseating)
liquid and suction line service valves. Add charge amount as
required for the total system. Refer to separate indoor unit
installation instructions for the required total system charge
when connected to the indoor unit.
To pump down:
1. Attach pressure gage to suction service valve gage
port.
2. Frontseat the liquid line valve.
V. TO START UNIT
CAUTION: The 538J unit coils hold only the
factory-designated amount of refrigerant. Additional
refrigerant may cause units to relieve pressure
through compressor internal pressure relief valve
(indicated by sudden rise of suction pressure) before
suction pressure reaches 5 psig (34 kPa). If this occurs,
shut off unit immediately, then frontseat the suction
valve and remove and reclaim excess refrigerant fol-
lowing accepted practice.
NOTE: When using 538J unit in conjunction with 619 series
fan coils, refer to start-up instructions included with fan coil
for correct start-up procedures.
Be sure that field disconnect is closed. Set room thermostat
below ambient temperature. Operate unit for 15 minutes,
then check system refrigerant charge. See Refrigerant
Charging section on page 8.
Unit compressor starts after a 5-minute delay if equipped
with accessory Time Guard® II device.
3. Start unit and run until suction pressure reaches
5 psig (34 kPa).
4. Shut unit off and frontseat suction valve.
5. Depressurize low side of unit and recover refrigerant
following accepted practice.
—7—
Table 3 — Electrical Data
OPERATIONAL
VOLTAGE*
COMPRESSOR
POWER SUPPLY
538J
V-PH-Hz
Max Fuse† or HACR-Type
Min
Max
RLA
LRA
Fan FLA
MCA
Ckt Bkr Amps
018
024
030
036
048
060
10.7
13.2
15.7
15.7
24.3
28.6
47.0
59.0
.70
.70
.70
.70
.45
.45
14.1
17.2
20.3
20.3
31.8
37.2
25
30
35
35
50
65
73.0
93.0
208/230-1-60
187
254
131.0
170.0
LEGEND
Full Load Amps
2. All motors and compressors contain internal overload protection.
3. In compliance with NEC (U.S.A. Standard) requirements for multimotor
and combination load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR breaker.
4. Motor RLA values are established in accordance with UL (Underwriters’
Laboratories) Standard 465 (U.S.A. Standard).
FLA
—
HACR — Heating, Air Conditioning, Refrigeration
LRA
MCA
NEC
RLA
—
—
—
—
Locked Rotor Amps
Minimum Circuit Amps per NEC Section 430-24
National Electrical Code (U.S.A. Standard)
Rated Load Amps (Compressor)
*Permissible limits of the voltage range at which unit will operate
satisfactorily.
†Time-delay fuse.
NOTES:
1. Control circuit is 24 v on all units and requires an external power source.
V. LOW PRESSURE SWITCH
hole, sealing surface around piston cones, and fluted
portion of piston are not damaged.
6. Clean piston refrigerant metering hole.
7. Replace retainer O-ring before reassembling Accu-
Rater device (O-ring part no. 99CC501052).
This switch, mounted on the suction line, has fixed non-
adjustable settings. To check pressure switch, attach pres-
sure gage to suction service valve gage port. Slowly close
liquid shutoff valve and allow compressor to pump down. Do
not allow compressor to pump down below 2 psig (14 kPa).
Compressor should shut down when suction pressure drops
to cutout pressure in Tables 1A and 1B, and should restart
when pressure builds up to cut-in pressure shown after
accessory CLO (compressor lockout) switch has been reset
and accessory Time Guard® II device has completed its tim-
ing cycle.
VIII. REFRIGERANT CHARGING
WARNING: To prevent personal injury, wear
safety glasses and gloves when handling refrigerant.
Do not overcharge system — this can cause compressor
flooding.
NOTE: Do not vent or depressurize unit refrigerant to atmo-
sphere. Remove and recover refrigerant following practice.
VI. SERVICE VALVES
The service valves in the outdoor unit come from the factory
frontseated. This means the refrigerant charge is isolated
from the line-set connection ports. To prevent damage to the
valve, use a wet cloth or other acceptable heat sink material
on the valve before brazing.
A. Superheat Method (Cooling, Non-TXV)
To check and adjust charge during cooling season, use
Tables 4A-5B and the following procedure:
1. Operate unit a minimum of 15 minutes before check-
ing charge.
2. Measure suction pressure by attaching a gage to suc-
tion valve service port.
3. Measure suction line temperature by attaching a ser-
vice thermometer to unit suction line near suction
valve. Insulate thermometer for accurate readings.
4. Measure outdoor coil inlet-air dry bulb temperature
with a second thermometer.
5. Measure indoor coil inlet-air wet bulb temperature
with a sling psychrometer.
6. Refer to Tables 4A and 4B. Find air temperature enter-
ing outdoor coil and wet-bulb temperature entering
indoor coil. At this intersection, note the superheat
temperature.
7. Refer to Tables 5A and 5B. Find superheat tempera-
ture and suction pressure and note suction line
temperature.
8. If unit has higher suction line temperature than
charted temperature, add refrigerant until charted
temperature is reached.
The service valves must be backseated (turned counterclock-
wise until seated) before the service port caps can be
removed and the hoses of the gage manifold connected. In
this position, refrigerant has access from the through out-
door and indoor unit. The service valve cannot be field
repaired; only a complete valve or valve stem seal and
service port caps are available for replacement.
VII. ACCURATER® (BYPASS TYPE) DEVICE
See Fig. 4 for bypass type AccuRater device components. The
piston has a refrigerant metering hole through it. The
retainer forms a stop for the piston in the refrigerant bypass
mode and a sealing surface for liquid line flare connection.
To check, clean or replace piston:
1. Shut off power to unit.
2. Pump down using Pumpdown Procedure section on
page 7.
3. Remove liquid line flare connection from AccuRater
device.
4. Pull retainer out of body, being careful not to scratch
flare sealing surface. If retainer does not pull out
easily, carefully use locking pliers to remove retainer.
5. Slide piston out by inserting a small soft wire, with
small kinks, through metering hole. Ensure metering
9. If unit has lower suction line temperature than
charted temperature, remove and recover refrigerant
until charted temperature is reached.
—8—
10. If air temperature entering outdoor coil or pressure
at suction valve changes, charge to new suction line
temperature indicated on chart.
Table 5A — Required Suction-Tube Temperature (F)
— English (Entering Suction Service Valve)
SUCTION PRESSURE AT SERVICE PORT (psig)
61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.7
SUPERHEAT
TEMP (F)
NOTE: The above procedure is independent of indoor air
quantity.
0
2
4
6
8
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
36
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
B. Subcooling Method (Cooling, TXV)
To check and adjust charge during cooling season, use
Tables 6A and 6B and the following procedure:
1. Operate unit a minimum of 15 minutes before check-
ing charge.
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
2. Measure liquid line temperature near liquid line ser-
vice valve, and measure liquid pressure at liquid line
service valve. Use a digital thermometer for all tem-
perature measurements. DO NOT use mercury or
dial-type thermometers.
3. Refer to Tables 6A and 6B. Find temperature point at
which the required subcooling temperature intersects
the measured liquid line pressure.
4. If the measured liquid line temperature does not
agree with the required liquid line temperature, ADD
refrigerant to lower the temperature, or REMOVE
refrigerant to raise the temperature (allow a toler-
ance of ± 3 F).
Table 4A — Superheat Charging Table — English
(Superheat Entering Suction Service Valve)
Table 5B — Required Suction-Tube Temperature (C)
— SI (Entering Suction Service Valve)
INDOOR COIL ENTERING AIR (F) WB
50 52 54 56 58 60 62 64 66 68 70 72 74 76
OUTDOOR
TEMP (F)
SUCTION PRESSURE AT SERVICE PORT (kPa)
424 443 463 483 503 524 546 568 591
SUPERHEAT
TEMP (C)
55
60
65
70
75
80
85
90
95
100
105
110
115
9
7
*
*
*
*
*
*
*
*
*
*
*
12 14 17 20 23 26 29 32 35 37 40 42 45
10 12 15 18 21 24 27 30 33 35 38 40 43
0
1
2
3
4
6
7
8
9
10
11
12
13
14
16
17
18
19
20
21
22
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
3
4
5
6
7
4
5
6
7
8
5
6
7
8
9
6
7
8
7
8
9
8
9
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
32
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
32
33
6
*
10 13 16 19 21 24 27 30 33 36 38 41
10 13 16 19 21 24 27 30 33 36 39
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
31
7
9
11
12
13
14
15
16
17
18
19
21
22
23
24
26
26
27
28
29
*
*
*
*
*
*
*
*
*
*
6
*
9
5
*
*
*
*
*
*
*
12 15 18 21 24 28 31 34 37
12 15 18 21 25 28 31 35
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
*
*
*
*
*
*
*
*
8
8
9
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
*
*
*
*
*
*
*
*
8
5
11 15 19 22 26 30 33
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
*
*
*
*
*
*
9
6
13 16 20 24 27 31
10 14 18 22 25 29
11
12
13
14
15
16
17
18
19
21
22
23
24
25
*
*
*
*
*
*
8
5
*
12 15 20 23 27
*
*
*
9
6
13 17 22 26
11 15 20 25
*
*
8
14 18 23
LEGEND
WB — Wet Bulb
*Do not attempt to charge system under these conditions or refrigerant slug-
ging may occur.
Table 4B — Superheat Charging Table — SI
(Superheat Entering Suction Service Valve)
INDOOR COIL ENTERING AIR (C) WB
10 11 12 13 14 16 17 18 19 20 21 22 23 24
OUTDOOR
TEMP (C)
13
16
18
21
24
27
29
32
35
38
41
43
46
5
4
*
*
*
*
*
*
*
*
*
*
*
7
6
3
*
*
*
*
*
*
*
*
*
*
8
7
6
4
*
*
*
*
*
*
*
*
*
9
8
7
6
3
*
*
*
*
*
11 13 14 16 18 19 21 22 23 25
10 12 13 15 17 18 19 21 22 24
9
7
5
3
11 12 13 15 17 18 20 21 23
9
7
4
11 12 13 15 17 18 20 22
8
7
4
3
10 12 13 16 17 19 21
8
6
5
3
10 12 14 16 17 19
*
*
8
7
6
4
3
11 12 14 17 18
*
*
*
*
*
*
*
*
*
*
*
*
9
8
7
5
3
11 13 15 17
10 12 14 16
*
*
*
*
*
*
8
7
6
4
11 13 15
*
*
*
*
*
*
9
8
8
12 14
11 14
10 13
*
*
*
LEGEND
WB — Wet Bulb
*Do not attempt to charge system under these conditions or refrigerant slug-
ging may occur.
—9—
MAINTENANCE
Clean coil annually or as required by location and outdoor
air conditions. Inspect coil monthly and clean as required.
Fins are NOT continuous through coil sections. Dirt and
debris may pass through the first section, become trapped
between the rows of fins, and restrict condenser airflow. Use
a flashlight to determine if dirt or debris has collected
between coil sections. Clean coil as follows:
WARNING: Before performing recommended main-
tenance, be sure unit main power is off. Failure to do so
may result in electrical shock or injury from rotating fan
blades.
1. Turn off unit power.
I. LUBRICATION
2. Use a garden hose or other suitable equipment to
flush coil from the outside to remove dirt. Be sure to
flush all dirt and debris from drain holes in the base
of unit. Fan motors are waterproof.
The outdoor fan motor is factory lubricated and requires no
oil.
II. COMPRESSOR
The compressor contains factory oil charges; replace oil when
lost. See Tables 1A and 1B for oil recharge. Recommended oil
is Sontex 200LT for all units.
III. CLEANING COILS
Coil should be washed out with water or blown out with com-
pressed air. Note that the blow-thru design causes dirt and
debris to build up on the inside of the coils.
Table 6A — Required Liquid Line Temperature (F) — English (At Service Valve)
REQUIRED
SUBCOOLING
(F)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
134 141 148 156 163 171 179 187 196 205 214 223 233 243 253 264 274 285 297 309 321 331 346 359
0
5
76
71
66
61
56
51
79
74
69
64
59
54
82
77
72
67
62
57
85
80
75
70
65
60
88
83
78
73
68
63
91
86
81
76
71
66
94
89
84
79
74
69
97 100 103 106 109 112 115 118 121 124 127 130 133 136 139 142 145
92
87
82
77
72
95
90
85
80
75
98 101 104 107 110 113 116 119 122 125 128 131 134 137 140
10
15
20
25
93
88
83
78
96
91
86
81
99 102 105 108 111 117 120 123 126 129 129 132 135
94
89
84
97 100 103 106 109 112 115 118 121 124 127 130
92
87
95
90
98 101 104 107 110 113 116 119 122 125
93 96 99 102 105 108 111 114 117 120
Table 6B — Required Liquid Line Temperature (C) — SI (At Service Valve)
REQUIRED
SUBCOOLING
(C)
LIQUID PRESSURE AT SERVICE VALVE (PSIG)
911 969 1030 1061 1121 1186 1219 1286 1360 1397 1471 1547 1588 1671 1755 1800 1885 1976 2026 2125 2222 2264 2379 2475
0
2
4
24
22
20
18
16
14
12
10
26
24
22
20
18
16
14
12
28
26
24
22
20
18
16
14
29
27
25
23
21
19
17
15
31
29
27
25
23
21
19
17
33
31
29
27
25
23
21
19
34
32
30
28
26
24
22
20
36
34
32
30
28
26
24
22
38
36
34
32
30
28
26
24
39
37
35
33
31
29
27
25
41
39
37
35
33
31
29
27
43
41
39
37
35
33
31
29
44
42
40
38
36
34
32
30
46
44
42
40
38
36
34
32
48
46
44
42
40
38
36
34
49
47
45
43
41
39
37
35
51
49
47
45
43
41
39
37
53
51
49
47
45
43
41
39
54
52
50
48
46
44
42
40
56
54
52
50
48
46
44
42
58
56
54
52
50
48
46
44
59
57
55
53
51
49
47
45
61
59
57
55
53
51
49
47
63
61
59
57
55
53
51
49
6
8
10
12
14
—10—
TROUBLESHOOTING
—11—
Copyright 2002 Bryant Heating & Cooling Systems
Printed in Mexico
CATALOG NO. 5353-802
|