®
Chromalox
SERVICE REFERENCE
Installation
DIVISION
SALES
4
SECTION LUH
and
(Supersedes PF479-5)
REFERENCE
PF479-6
RENEWAL PARTS IDENTIFICATION
161-303474-001
DATE
JANUARY, 2003
Type LUH
Horizontal Unit Heater
Specifications — Table 1
Electrical Data (60 Hz)
Dimensions (In.)
Width
Standard
Contactor
Rating (Qty.)
Model
Volts
Watts
Phase
Amps
BTU
Height
Depth
LUH-D-02-81
LUH-D-02-21
LUH-D-02-71
LUH-D-04-81
LUH-D-04-83
LUH-D-04-21
LUH-D-04-23
LUH-D-04-71
LUH-D-04-43
LUH-D-05-81
LUH-D-05-83
LUH-D-05-21
LUH-D-05-23
LUH-D-05-71
LUH-D-05-43
LUH-D-07-81
LUH-D-07-83
LUH-D-07-21
LUH-D-07-23
LUH-D-07-71
LUH-D-07-43
LUH-D-10-81
LUH-D-10-83
LUH-D-10-21
LUH-D-10-23
LUH-D-10-43
LUH-D-12-83
LUH-D-12-23
LUH-D-12-43
LUH-D-15-83
LUH-D-15-23
LUH-D-15-43
LUH-D-20-23
LUH-D-20-43
LUH-D-25-43
LUH-D-30-83
LUH-D-30-23
LUH-D-30-43
LUH-D-35-23
LUH-D-35-43
LUH-D-40-23
LUH-D-40-43
LUH-D-45-43
208
208/240
277
2,667
2,000/2,667
2,667
1
1
1
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
12.8
11.1 *
9.6
19.2
11.2
16.7 *
9.6 *
14.5
4.8
24.0
13.8
20.8 *
12.1 *
18.2
6.0
36.1
20.9
31.1 *
18.1 *
27.2
9.0
48.0
27.8
41.7 *
24.0 *
12.0
34.8
30.1 *
15.1
41.8
36.2 *
18.1
48.0 *
24.0
30.0
83.4
72.2 *
36.1
84.3 *
42.1
96.0 *
48.0
54.1
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
50A (1)
30A (1)
30A (1)
30A (1)
30A (1)
30A (1)
50A (1)
30A (1)
30A (1)
30A (1)
30A (1)
50A (1)
50A (1)
30A (1)
50A (1)
50A (1)
30A (1)
50A (1)
30A (1)
50A (1)
50A (2)
50A (2)
30A (2)
50A (2)
30A (2)
50A (2)
30A (2)
30A (2)
8,850
16
13-1/8
8-7/8
†
†
†
†
208
4,000
208/240
3,000/4,000
13,661
17,076
25,598
34,130
16
13-1/8
8-7/8
277
480
4,000
4,000
†
†
†
†
208
5,000
208/240
3,750/5,000
16
13-1/8
17-1/4
17-1/4
8-7/8
11-1/2
11-1/2
277
480
5,000
5,000
†
†
208
7,500
208/240
5,625/7,500
20-1/2
20-1/2
277
480
7,500
7,500
†
†
208
10,000
208/240
7,500/10,000
480
208
208/240
480
208
208/240
480
208/240
480
480
208
208/240
480
10,000
12,500
9,375/12,500
12,500
15,000
11,250/15,000
15,000
15,000/20,000
20,000
25,000
30,000
22,500/30,000
30,000
42,663
51,195
20-1/2
20-1/2
17-1/4
17-1/4
11-1/2
11-1/2
68,460
85,525
24
24
20-1/8
20-1/8
11-1/2
11-1/2
102,390
119,455
24
24
20-1/8
20-1/8
17-1/4
17-1/4
208/240
480
208/240
480
26,250/35,000
35,000
30,000/40,000
40,000
136,520
153,585
24
24
20-1/8
20-1/.8
17-1/4
17-1/4
480
45,000
† These models can be field changed from single phase to three phase or three phase to single phase.
*Note: 208V amperage is 86% of 240V value.
© 2010 Chromalox, Inc.
INSTALLATION
BACK WALL
G
Threaded
Mounting
Holes
S
I
D
E
L
I
W
A
L
X
L
Figure 2 Rod Spacing
Table 4 — Rod Thread Type and Spacing Dimensions (In.) for
Horizontal Discharge
Dimensions (In.)
Rod
Thread
Type
Figure 3 Wall and Ceiling Clearance (Table 2)
Unit
I
G
L
X
2 - 5kW
5/16 - 18 4-1/2
5-1/2
8-1/4
8-1/4
8-1/4
2-3/4
4-1/8
4-1/8
4-1/8
2-1/4
3-1/8
3-1/8
5-7/8
7-1/2 - 15kW 3/8 - 16 6-1/4
20 - 25kW
30 - 45kW
3/8 - 16 6-1/4
3/8 - 16 11-3/4
Note:
W = Minimum Distance to
Wall for Full 180˚ Swivel
One 11/16" mounting hole
for swivel mounting
for ceiling
W
N
V
M
U
A
Knockouts
1/2"
B
C
Figure 4
Optional Ceiling Swivel Mounting Bracket
Dimensions (In.)
Bracket
Model
No.
Wt. Use
(Lbs.) With
A
B
C
M
N
U
V
W
Chromalox
®
LUH-02
Figure 6
WUH-04A
16 13-1/8 8-7/8
6
4-7/16
4
4-1/2 10-1/2
3
04, 05
Heater Back View
LUH-07
5-1/2
WUH-05
WUH-05
WUH-06
20-1/2 17-1/4 11-1/2
24 20-1/8 11-1/2
24 20-1/8 17
8
8
6-1/4
6-1/4
6
6
6
7-1/4
7-1/4
7-1/4
16
16
21
10, 12, 15
Figure 5
5-1/2 LUH-20, 25
Knockout Sizes
Optional Wall Swivel Mounting Bracket
LUH-30
11
13-3/4 10
Dimensions - (In.)
Bracket
LUH-02 - LUH-05
LUH-07 - LUH-15
LUH-20 - LUH-25
LUH-30 - LUH-45
3/4” (1)
35, 40, 45
Bracket
Model
Number
1” (1)
Weight
(Lbs.)
Use
With
3/4”, 1”, 1-1/4”(1)
3/4”, 1”, 1-1/4”(1)
P
Q
R
S
T
LUH-02
04, 05
WUH-01A
WUH-02
1-3/4
21-1/2
6-3/4
5-1/2
14-15/16
4-1/2
LUH-07
2
2
28-7/16
28-7/16
9-1/2
8-3/8
22-1/4
12-1/4
10, 12, 15
WUH-02
WUH-03
9-1/2
5
8-3/8
3-1/2
22-1/4
33-1/4
12-1/4
24-1/4
LUH-20, 25
LUH-30,
5-1/2 28-11/16
35, 40, 45
3
WIRING
3. Consult the local wiring code in your area.
SUMMER FAN SWITCH (MOUNTED ON FRONT OF
HEATER). When the switch handle is pointing toward the “SUM-
MER” position, the fan will run continuously. When the switch
handle is pointing toward the “WINTER” position, the fan will run
only when the heating elements are hot.
REMOTE FAN SWITCH (MANUAL SWITCH-LINE VOLT-
AGE). 480V requires an additional relay. The wall switch is packed
in the wiring compartment.
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do
so could result in personal injury or property dam-
age. Heater must be installed by a qualified person
in accordance with the National Electrical Code,
NFPA 70.
The remote fan switch is mounted external and remote from the
LUH unit heater. The voltage of the remote fan switch is the same
as the supply voltage to the LUH heater.
1. Use 14 gauge copper, NEC Class 1, 600V rated insulated wire.
Wiring must meet all Local and NEC requirements for 480V
service.
2. Install the remote fan switch in standard wall box in any con-
venient location that is protected from traffic or other acci-
dental damage.
ELECTRIC SHOCK HAZARD. Any installation involv-
ing electric heaters must be performed by a quali-
fied person and must be effectively grounded in
accordance with the National Electrical Code to
eliminate shock hazard.
1. Use heater only on the voltage and frequency specified on the
nameplate.
2. All wiring should be done in accordance with local codes and
the National Electrical Code by a qualified person as defined in
the NEC.
3. Connect the 14 gauge copper field wire to the switch lead
wires with suitable connectors.
REMOTE FAN SWITCH (USED WITH 24 or 120-VOLT
RELAY) (Available as a kit or factory installed option). The wall
switch is packed in the wiring compartment.
3. Two knockouts are provided on the back of the heater for wire
entry. See Figure 6 for location of knockouts.
4. Branch circuit wire for connection to heater must be at least
60°C wire.
1. Use 18 gauge (min.) NEC Class 1, 600V wiring that meets all
Local and NEC requirements.
5. The bottom access door is hinged. There is one screw that must
be loosened to gain access (Figure 3). This screw is the captive
type; do not try to remove it.
2. Install the wall switch in a standard wall box in any convenient
location that is protected from traffic or other accidental damage.
3. Connect the field wire to the switch lead wires with suitable
connectors.
6. A ground terminal is provided near the power terminal board.
The ground wire should be connected before other connections
are made.
15/16”
7. Stripped wire leads are supplied to be connected to accept the
correct size power supply wire. Copper wire rated at 600V and
60°C is satisfactory for the heater branch circuit.
8. Electrical accessories, either kits or factory-installed options, are
shown connected by a dash line on the heater wiring diagram.
9. Wiring connections are to be made on designated wire leads as
shown in the wiring diagrams located inside the access door.
POWER DISCONNECT SWITCH (Available as a kit or factory
installed option.) This switch (Figure 7) disconnects the power to
the power leads when the handle is placed in its off position.
1. Use copper conductor supply wire only when connecting to
the power line.
®
Chromalox
Figure 8 — Thermostat Location, Front View
OPTIONAL THERMOSTAT (LUH-TK)
Heaters can be equipped with an optional thermostat of the
Bulb and Capillary type for automatic temperature control (Figure
8). The thermostat controls the heating elements and fan simulta-
neously to achieve set temperature.
2. Connection to the switch pigtails should be made with com-
The “Lo” setting of the thermostat is approximately 40°F, and
the “Hi” setting is approximately 90°F.
pression connectors and the joint should be then well insulated.
CONTROL VOLTAGE WIRING - EXTERNAL REMOTE
Power
THERMOSTATS AND FAN SWITCHES
Disconnect
Switch
Contactor
ELECTRIC SHOCK HAZARD. Line voltage is present
on some of the terminals. Always disconnect the
power from the heater before making any connec-
tions.
L1
L2
L3
S1
S2
S3
To
Power
Supply
See Notes
1. Use 600V, NEC Class 1 insulated wiring with a minimum
gauge of 18 for thermostats and a minimum gauge of 14 for
line voltage motor switch (remote fan switch without relay).
2. The thermostat should be located in the area to be heated on
an inside wall. The thermostat should not be exposed to drafts,
sunlight, radiation from hot objects, or in a direct line with the
discharge from the unit heater.
See
Note 2
Notes:
1. This illustration shows wiring hook up
for three phase service. Remove lead
wires marked L2 and S2 when using single
phase power service.
3. Install the thermostat approximately 5 feet above the floor
line.
2. For units without contactors, disconnect
switch is to be wired to lead wires on
heater power.
4. Install the remote fan switch in any convenient location that is
protected from traffic or likely accidental damage.
5. Internal optional controls are shown on the unit heater wiring
diagrams by a dash line.
3. Use copper supply wire only with this
switch.
Use wiring diagrams as listed for model number on (A through X),
pages 5, 6 and 9.
Figure 7
For installation and optional control kits, refer to instruction sheets
listed on page 8.
Power Disconnect Switch Wiring Diagram
4
WIRING DIAGRAMS
Optional
Field Wiring
Thermostat
Optional
Built-in Or Field Installed
Factory Wiring
Optional Thermostat
Built-in Or Field Installed
To Element Wiring
1 Phase 2 Or 3 Elem
3 Phase Delta
Built-in Or Field Installed
Summer Fan Switch
Built-in Or Field
Installed
To Element Wiring
Cutout
Cutout
1
3
7
9
10
12
2
3 Phase Delta
MOTOR
1O OR 3O
Motor
1Ø Or 3Ø
X1
X2
H2
T1 T2 T3
C1
T1 T2 T3
C1
T1 T2 T3
C1
8
XFMR
11
X1
H1
X2
H2
T1 T2 T3
C1
3O Wiring Only
L1 L3
L1 L2L3
H1
T1 T2 T3
C1
XFMR
3Ø Wiring Only
L3
L2
L1
Power
60 HZ
L1 L2L3
3Ø Wiring Only
L3
L2
L1
Transformer Color Code Index
PRI. XFMR 120V SEC. 24V SEC.
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
H1 H2 X1 X2 X1 X2
1 Phase 2 Or 3 Elem
Optional Disconnect Switch
Built-in Or Field Installed
Power
60 HZ
Transformer Color Code Index
PRI. XFMR 120V SEC.
24V SEC.
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
H1 H2 X1 X2 X1 X2
PRI.
PRI.
Optional Disconnect Switch
Built-in Or Field Installed
Motor
1Ø Or 3Ø
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
277 BLK BRN BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
Field Wiring
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
277 BLK BRN BLK WHT YEL BLU
T1 T2 T3
C1
T1 T2 T3
C1
Built-in Or Field Installed
Factory Wiring
L1 L3
Standard Motor Connection
30-00,32-00 30-40,32-40
30-41,32-41 30-42,32-42 30-44,32-44
Figure A
Figure B
To Element
Wiring
Optional
Optional
Optional
Thermostat
Built-in Or
Field Wiring
Built-in Or Field Installed
Factory Wiring
Fan Relay
Built-in
Thermostat
To Element Wiring
Motor
1O Or 3O
Built-in Or Field Installed
Cutout
Or Field
Installed
3 Phase Delta
Field Installed
C1
Optional
Summer
Fan Switch
Built-in Or
Field Installed
C1
C2
C2
1 Phase 2 Or 3 Elem
T1 T2 T3
C1
3O
Cutout
Wiring C3
C3
Control
Power
By Others
Only
T1 T2 T3
C1
T1 T2 T3
C1
2
1
3
X1
H1
X2
H2
Motor
1O
7
8
11
9
10
12
L1 L2L3
T1 T2 T3
C1
Optional Disconnect
Switch Built-in Or
Field Installed
3Ø Wiring
Only
L1 L3
1 Phase 2 Or 3 Elem
L1 L2 L3
Transformer Color Code Index
PRI. XFMR 120V SEC. 24V SEC.
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
H1 H2 X1 X2 X1 X2
3 Phase Delta
L3
L2
L1
PRI.
Power
60 HZ
Power
60 HZ
T1 T2 T3
C1
Optional Disconnect Switch
Built-in Or Field Installed
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
277 BLK BRN BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
30-45, 32-45 30-43, 32-43
Motor
1O Or 3O
T1 T2 T3
C1
L1 L3
Field Installed
T1 T2 T3
C1
Built-in Or Field Installed
Factory Wiring
L1 L2L3
31-00,33-00 31-40,33-40
Standard Motor Connection
Figure C
Figure D
Optional
Field Installed
Built-in Or Field Installed
Factory Wiring
Optional
To Element Wiring
Optional
Thermostat
Built-in Or
To Element Wiring
Summer Fan Switch
Built-in Or Field
Installed
Thermostat
Built-in Or Field Installed
Cutout
C1
Field Installed
Optional
Fan Relay
Built-in Or
Field
1 Phase 2 Or 3 Elem
1
2
Motor
1O Or 3O
Optional
Summer
Fan Switch
Built-in Or
Field Installed
Control
Power
By Others
3
Motor
1Ø Or 3Ø
Cutout
7
9
3 Phase Delta
C1
C2
T1 T2 T3
C1
8
Installed
10
12
11
T1 T2 T3
C1
T1 T2 T3
C2
T1 T2 T3
C1
C3
C3
C3
3Ø Wiring Only
2
1
3
7
T1 T2 T3
C1
L3
L2
L1
L1 L3
Power
60 HZ
3Ø Wiring Only
8
11
9
10
12
L1 L2L3
3 Phase Delta
Control Power
(By Others)
Optional Disconnect Switch
Built-in Or Field Installed
1 Phase 2 Or 3 Elem
3O Wiring Only
Note: 480V Heaters Require
Fan Relay For 480V Motor
(See Fig. F)
L1 L2 L3
Motor
1Ø Or 3Ø
Motor
1O Or 3O
Power
60 HZ
T1 T2 T3
C1
Field Installed
Built-in Or Field Installed
Factory Wiring
T1 T2 T3
C1
T1 T2 T3
C1
T1 T2 T3
C1
Optional Disconnect Switch
Built-in Or Field Installed
31-43,33-43 31-45,33-45
L1 L2L3
Standard Motor Connection
L1 L3
Standard Motor Connection
31-41,33-41 31-42,33-42 31-44,33-44
Figure E
Figure F
Optional
Optional
Optional Thermostat
Built-in Or Field Installed
Summer Fan Switch
Built-in Or Field
Installed
Thermostat
Built-in Or
To Element Wiring
To Element Wiring
3 Phase Delta
Field Installed
Cutout
1
3
7
9
2
Motor
1Ø Or 3Ø
Cutout
Motor
1Ø
8
T1 T2 T3
C1
3 Phase Delta
10
12
T1 T2 T3
C1
T1 T2 T3
C1
11
L1 L2L3
3Ø Wiring Only
T1 T2 T3
C1
1 Phase 2 Or 3 Elem
L3
L2
L1
3Ø Wiring Only
Power
60 HZ
3Ø Wiring Only
L1 L2L3
L3
L2
L1
1 Phase 2 Or 3 Elem
Power
60 HZ
Optional Disconnect Switch
Built-in Or Field Installed
T1 T2 T3
C1
Motor
1Ø Or 3Ø
Optional Disconnect Switch
Built-in Or Field Installed
Field Installed
Built-in Or Field Installed
Factory Wiring
Field Installed
Built-in Or Field Installed
Factory Wiring
T1 T2 T3
C1
L1 L3
T1 T2 T3
C1
34-41,35-41 34-42,35-42 34-44,35-44
L1 L3
Standard Motor Connection
34-00,35-00 34-40,35-40
Figure G
Figure H
5
WIRING DIAGRAMS
Field Installed
Built-in Or Field Installed
Factory Wiring
Elements
Stage 1
Elements
Stage 2
Field Installed
Built-in Or Field Installed
Factory Wiring
To Element Wiring
Motor
3o
Optional
Thermostat
Built-in Or
Optional
Fan Relay
Built-in Or
Field
Optional
Motor
1Ø Or 3Ø
Thermostat
1 Phase 2 Or 3 Elem
Built-in Or Field Installed
Field Installed
Fuses
KTK-3
Cutout
Installed
C1
C2
C3
2
1
3
7
T1 T2 T3
C1
T1 T2 T3
T1 T2 T3
T1 T2 T3
T1 T2 T3
C1
C1
C2
Contactor (Typ.)
C3
X1
H1
X2
H2
Cutouts
8
11
9
10
12
L1 L3
XFMR
Optional
Summer Fan Switch
Built-in Or Field
Installed
3 Phase Delta
Fuses
(When Req'd)
3Ø Wiring Only
Transformer Color Code Index
L1 L2 L3
AL3
AL2
AL1
BL3
PRI.
PRI. XFMR 120V SEC.
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
24V SEC.
Power
60 HZ
BL2
BL1
Motor
1Ø Or 3Ø
H1 H2 X1 X2 X1 X2
T1 T2 T3
C1
L3
Optional Disconnect
Switch Built-in Or
Field Installed
3 Phase,
60 HZ Power
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
L2
L1
T1 T2 T3
C1
Optional Disconnect Switch
Built-in Or Field Installed
34-43,35-43 34-45,35-45
L1 L2L3
Standard Motor Connection
30-00, 32-00 30-40, 32-40
Figure I
Figure J
To Elements
Stage 1
To Elements
Stage 2
Optional Thermostat
Built-in Or
Field Installed
Elements
Elements
Stage 2
C2
Elements
Stage 2
Elements
Motor
3Ø
Optional
Motor
3Ø
T1T2T3
C1
T1T2T3
C2
Contactor
Thermostat
Built-in Or
Field Installed
Fan Relay
Stage 1
Stage 1
Fuses KTK-3
C3
Motor
3Ø
Cutouts
C2
T1T2T3
C2
T1T2T3
Cutouts
T1 T2
C1
T3
T1 T2
C2
T3
Contactor
C3
1
3
2
Standard Motor Connection
C1
Contactor
T1 T2 T3
T1 T2 T3
Contactor
7
C1
C2
(Typ.)
9
10
12
8
2
8
1
3
7
Motor
3Ø
Standard Motor Connection
X1
H1
X2
H2
11
C1
X1
Fuses KTK-3
Fuses
(When Req'd)
9
X2
10 11
12
XFMR
Fuses
(When Req'd)
AL3
BL3
BL2
AL2
AL1
XFMR
Optional Summer
Fan Switch
Summer Fan Switch
Transformer Color Code Index
PRI. XFMR 120V SEC. 24V SEC.
Built-in Or Field Installed
Factory Wiring
Transformer Color Code Index
BL3
Built-in Or
AL3
BL1
AL2
H1
H2
Field Installed
BL2
Optional Disconnect
Switch Built-in Or
Field Installed
AL1
PRI.
BL1
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
PRI. PRI.
VOLT LEAD
120V SEC. 24V SEC.
LEAD CLRS. LEAD CLRS.
XFMR
CLRS
Field Wiring
Built-in Or Field Installed
Factory Wiring
H1 H2 X1 X2 X1 X2
Optional Disconnect
Switch Built-in Or
Field Installed
L1L2L3
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
H1
H2
X1
X2
X1
X2
Note: Heater requires
Fan Relay for 480V
Motors. (See Figure L)
3 Phase
60 HZ Power
L1 L2 L3
208
240
BLK
BLK
RED
BLK WHT YEL
BLK WHT YEL
BLU
For Use With 480V
30-43,32-43 30-45,32-45
30-41, 30-42, 30-44
32-41, 30-42, 32-44
3 Phase,
60 HZ Power
ORG
BLU
Figure K
Figure L
Elements
Elements
Stage 2
Elements
Elements
Stage 2
Field Wiring
Built-in Or Field Installed
Factory Wiring
Motor
3Ø
Motor
3Ø
Stage 1
Stage 1
Fuses KTK-3
Fuses
KTK-3
C3
C2
1
3
2
Control Power
(By Others)
T1 T2 T3
T1 T2 T3
C3
7
C1
C2
C2
Contactor
(Typ.)
8
9
10
12
Cutouts
T1 T2 T3
T1 T2 T3
C2
Control Power
(By Others)
C1
Contactor (Typ.)
C1
11
Cutouts
C1
Fuses
(When Req'd)
Optional Summer
Fan Switch
To Elements
Stage 1
To Elements
Stage 2
Optional Thermostat
Built-in Or
Field Installed
BL3
AL3
AL2
AL1
Motor
3Ø
Built-in Or
Fuses
(When Req'd)
BL2
Optional Thermostat
Built-in Or
Field Installed
Field Installed
AL3
AL2
AL1
BL3
BL2
BL1
BL1
Optional Disconnect
Switch Built-in Or
Field Installed
Note: Heater Requires
Fan Relay For 480V Motors
(See Fig. O)
L3
L2
L1
Field Installed
Built-in Or Field Installed
Factory Wiring
Optional Disconnect
Switch Built-in Or
Field Installed
3 Phase,
60 HZ Power
C1
C2
L1 L2 L3
Standard Motor
Connection
3 Phase,
60 HZ Power
31-41, 33-41 31-44, 33-44
31-00, 33-00 31-40, 33-40
Figure M
Figure N
Elements
C2
Elements
Stage 1
Elements
Elements
Warning - First Stage Of Thermostat Must
Be Connected To Terminals C1 & C2 To
Insure That Motor Will Be Energized With
First Stage Heat Operation
Optional Thermostat
Built-in Or
T1T2T3
C1
T1T2T3
Motor
3Ø
Contactor
C2
Field Installed
(Single Stage)
Stage 2
T1T2T3
Stage 1
Fan Relay
Stage 2
Motor
3Ø
C3
C2
Fuses
KTK-3
T1T2T3
Contactor
Standard Motor Connection
C2
C1
Contactor
Cutouts
C3
C3
C2
C3
C2
2
8
1
3
7
Motor
3Ø
C1
C2
Contactor (Typ.)
Cutouts
Fuses KTK-3
Fuses
9
C1
Stage 1
C4
10 11
C1
12
(When Req'd)
Alternate
AL3
BL3
BL2
AL2
AL1
Fuses
(When Req'd)
1 Stage
Thermostat
(by Others)
Stage 2
C1
BL1
2 Stage Thermostat
(By Others)
Control Power
(By Others)
Summer Fan Switch
Field Installed
Optional Disconnect
Switch Built-in Or
Field Installed
Fused Switch
(By Others)
L1L2L3
AL1 AL2 AL3
BL1 BL2 BL3
Customer Wiring
Factory Wiring
3 Phase
60 HZ Power
For Use With 480V
Built-in Or Field Installed
Factory Wiring
3 Phase,
60 HZ Power
3 Phase,
60 HZ Power
31-43,33-43 31-45,33-45
34-00, 35-00, 34-40, 35-40
Figure O
Figure P
6
RENEWAL PARTS IDENTIFICATION
MANUFACTURER PART NUMBER BREAKDOWN
FOR MADE TO ORDER UNITS
(LOCATED ON UNIT NAMEPLATE)
L U H
D
Heater
Line Volts
Wiring
Figure
Heater
Line Volts
Wiring
Figure
Code
Description
Part No.
Code
Description
Part No.
Element
Part No.
Motor
Part No.
Fan
Part No.
00-40 Thermostat DP
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
300-049197-004
072-303180-001
072-303180-002
315-304252-002
072-303180-001
072-303180-002
315-304252-002
300-049197-003
072-303180-001
072-303180-002
315-304252-002
300-049197-003
292-057673-001
072-303180-001
072-303180-002
315-304252-002
292-057673-001
072-303180-001
072-303180-002
315-304252-002
Code Disconnect
Rating
Disconnect
Part No.
292-303472-001
292-303472-002
292-303472-003
32-45 Contactor (120) 30A
Contactor (120) 50A
Transformer
All
All
All
072-303180-007
072-303180-008
315-304252-001
Code
kW
Volts
Phase
30-00 Contactor ( 24 V) 30A
Contactor ( 24 V) 50A
Transformer
30-40 Contactor ( 24 V) 30A
Contactor ( 24 V) 50A
Transformer
A, J, S
A, J
C, L
1
2
3
40A
80A
100A
02-81
02-21
02-71
04-81
04-83
04-21
04-23
04-71
04-43
05-81
05-83
2.67
2.67
2.67
4
208
208/240
277
208
208
208/240
208/240
277
480
208
1
1
1
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
1
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
118-303160-001 (2) 193-302912-001 112-302997-001
118-303160-002 (2) 193-302912-001 112-302997-001
118-303160-003 (2) 193-302120-001 112-130367-001
118-303160-001 (3) 193-302912-001 112-302997-001
118-303160-001 (3) 193-302912-001 112-302997-001
118-303160-002 (3) 193-302912-001 112-302997-001
118-303160-002 (3) 193-302912-001 112-302997-001
118-303160-003 (3) 193-302120-001 112-130367-001
118-303160-004 (3) 193-302912-003 112-302997-001
118-303160-005 (3) 193-302912-001 112-302997-001
118-303160-005 (3) 193-302912-001 112-302997-001
118-303160-006 (3) 193-302912-001 112-302997-001
118-303160-006 (3) 193-302912-001 112-302997-001
118-303160-007 (3) 193-302120-001 112-130367-001
118-303160-008 (3) 193-302912-003 112-302997-001
118-303170-005 (3) 193-302912-004 112-130367-007
118-303170-005 (3) 193-302912-004 112-130367-007
118-303170-001 (3) 193-302912-004 112-130367-007
118-303170-001 (3) 193-302912-004 112-130367-007
118-303170-006 (3) 193-302120-004 112-130367-007
118-303170-004 (3) 193-302912-005 112-130367-007
118-303169-001 (3) 193-302912-004 112-130367-002
118-303169-001 (3) 193-302912-004 112-130367-002
118-303169-002 (3) 193-302912-004 112-130367-002
118-303169-002 (3) 193-302912-004 112-130367-002
118-303169-003 (3) 193-302912-005 112-130367-002
118-303169-004 (3) 193-302912-004 112-130367-002
118-303169-005 (3) 193-302912-004 112-130367-002
118-303169-006 (3) 193-302912-005 112-130367-002
118-303169-007 (3) 193-302912-004 112-130367-002
118-303169-008 (3) 193-302912-004 112-130367-002
118-303169-009 (3) 193-302912-005 112-130367-002
118-130419-010 (3) 193-302120-005 112-130367-003
118-130419-011 (3) 193-302120-005 112-130367-003
118-130419-012 (3) 193-302120-005 112-130367-003
118-130384-013 (6) 193-302120-005 112-130367-004
118-130384-014 (6) 193-302120-005 112-130367-004
118-130384-015 (6) 193-302120-005 112-130367-004
118-130384-021 (6) 193-302120-005 112-130367-004
118-130384-016 (6) 193-302120-005 112-130367-004
118-130384-022 (6) 193-302120-005 112-130367-004
118-130384-017 (6) 193-302120-005 112-130367-004
118-130384-018 (6) 193-302120-005 112-130367-004
Fan Relay
Fan Relay
Remote Fan Switch 3PDT
Thermostat SP
2.6-5kW 072-303180-011
7.5-45kW 072-303180-007
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
292-057673-001
300-049197-003
072-303180-007
072-303180-008
072-303180-007
072-303180-008
300-049197-003
072-303180-007
072-303180-008
292-057673-001
300-049197-003
072-303180-007
072-303180-007
292-057673-001
072-303180-007
072-303180-008
4
Thermostat SP
33-00 Contactor (120) 30A
Contactor (120) 50A
33-40 Contactor (120) 30A
Contactor (120) 50A
Thermostat SP
33-41 Contactor (120) 30A
Contactor (120) 50A
Fan Switch 3PDT
D, M, U
D, M
3/4
3/4
4
4
5
30-41 Contactor (24V) 30A
Contactor (24V) 50A
Transformer
B, K
B, K
Thermostat SP
Fan Switch 3PDT
Miscellaneous Parts
5
208
30-42 Contactor (24V) 30A
Contactor(24V) 50A
Transformer
Remote Fan Switch 3PDT
30-43 Contactor (24V) 30A
Contactor (24V) 50A
Transformer
Fan Relay
Fan Relay
Remote Fan Switch 3PDT
30-44 Contactor (24V) 30A
Contactor (24V) 50A
Transformer
E, N
Thermostat Knob
Mod. Decal Card
169-049278-001
170-303678-001
05-21 3.75/5 208/240
05-23 3.75/5 208/240
05-71
05-43
07-81
07-83
07-21 5.6/7.5 208/240
07-23 5.6/7.5 208/240
07-71
07-43
10-81
10-83
10-21 7.5/10 208/240
10-23 7.5/10 208/240
10-43
12-83
12-23 9.4/12.5 208/240
12-43
15-83
15-23 11.2/15 208/240
15-43 15 480
20-23 15/20 208/240
20-43
25-43
30-83
30-23 22.5/30 208/240
30-43 30 480
35-23 26.2/35 208/240
35-43 35 480
40-23 30/40 208/240
40-43
45-43
Thermostat SP
33-42 Contactor (120) 30A
Contactor (120) 50A
Remote Fan Switch 3PDT
33-43 Contactor (120) 30A
Contactor (120) 50A
Fan Relay
5
5
7.5
7.5
277
480
208
208
E, N, V
F, O, R
C, L, T
2.6-5kW 072-303180-011
7.5-45kW 072-303180-001
2.6-5kW 072-303180-011
7.5-45kW 072-303180-007
All
All
All
All
All
All
All
All
All
All
292-057673-001
072-303180-001
072-303180-002
315-304252-002
292-057673-001
300-049197-003
072-303180-001
072-303180-002
315-304252-002
292-057673-001
Fan Relay (120V)
7.5
7.5
10
277
480
208
208
Remote Fan Switch 3PDT
33-44 Contactor (120) 30A
Contactor (120) 50A
Remote Fan Switch 3PDT
Thermostat SP
33-45 Contactor (120) 30A
Contactor (120) 50A
Fan Relay
All
All
All
All
All
All
All
292-057673-001
072-303180-007
072-303180-007
292-057673-001
300-049197-003
072-303180-007
072-303180-008
B, K
C, L
E, N
Instruction Sheets
1. Internal Thermostat
10
Remote Fan Switch 3PDT
Thermostat SP
30-45 Contactor (24V) 30A
Contactor (24V) 50A
Transformer
PF-448
PF-480
2. Internal/External Summer Fan Switch
10
12.5
480
208
3. Internal/External Summer Fan Switch
with Relay
2.6-5kW 072-303180-011
7.5-45kW 072-303180-007
All
All
PF-481
PF-482
Remote Fan Switch 3PDT
Fan Relay
Fan Relay
Fan Relay
Remote Fan Switch 3PDT
Thermostat SP
F, O
G, P
G, P
H, Q
4. Disconnect Switch
2.6-5kW 072-303180-011
7.5-45kW 072-303180-001
292-057673-001
300-049197-003
12.5
15
480
208
Thermostat SP
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
300-049197-003
072-303180-001
072-303180-002
072-303180-001
072-303180-002
300-049197-003
072-303180-001
072-303180-002
300-049197-003
292-057673-001
072-303180-001
072-303180-002
292-057673-001
072-303180-001
072-303180-002
34-00 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
34-40 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
31-00 Contactor (24V) 30A
Contactor (24V) 50A
31-40 Contactor (24V) 30A
Contactor (24V) 50A
Thermostat SP
31-41 Contactor (24V) 30A
Contactor (24V) 50A
Thermostat SP
D, M, U
D, M
20
25
30
480
480
208
Thermostat SP
208/240 300-049197-003
34-41 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
E, N
Fan Switch 3PDT
Thermostat SP
34-42 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
Remote Fan Switch 3PDT 208/240 292-057673-001
34-43 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
208/240 292-057673-001
208/240 300-049197-003
Fan Switch 3PDT
31-42 Contactor (24V) 30A
Contactor (24V) 50A
Remote Fan Switch 3PDT
31-43 Contactor (24V) 30A
Contactor (24V) 50A
Fan Relay
H, Q
E, N, V
F, O, R
40
45
480
480
I, R, V
Fan Relay
208/240 072-303180-013
2.6-5kW 072-303180-011
7.5-45kW 072-303180-001
Remote Fan Switch 3PDT 208/240 292-057673-001
34-44 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
Remote Fan Switch 3PDT 208/240 292-057673-001
Fan Relay
Remote Fan Switch 3PDT
31-44 Contactor (24V) 30A
Contactor (24V) 50A
Remote Fan Switch 3PDT
Thermostat SP
31-45 Contactor (24V) 30A
Contactor (24V) 50A
Fan Relay
All
All
All
All
All
All
All
All
292-057673-001
072-303180-001
072-303180-002
292-057673-001
300-049197-003
072-303180-001
072-303180-002
072-303180-001
H, Q
E, N
F, O
Thermostat SP
208/240 300-049197-003
Part Number
7.5-15kW
34-45 Contactor (208/240) 30A 208/240 072-303180-013
Contactor (208/240) 50A 208/240 072-303180-014
Description
2-5kW
20-25kW
30-45kW
Louver
182-130329-001 (4)
276-130368-001 (4)
300-049200-001
043-130336-014
043-130379-028
182-130329-002 (5)
276-130368-001 (5)
300-049200-001
043-130335-011
043-130379-031
182-130329-003 (6)
276-130368-001 (6)
300-049200-001
043-130334-008
043-130379-033
182-130329-003 (6)
276-130368-001 (6)
300-049200-001
043-130334-008
043-130379-033
Fan Relay
208/240 072-303180-013
I, R, V
Louver spring
Cut-Out
Case Front
Remote Fan Switch 3PDT 208/240 292-057673-001
Thermostat SP
35-00 Contactor (277) 30A
Contactor (277) 50A
35-40 Contactor (277) 30A
Contactor (277) 50A
Thermostat SP
35-41 Contactor (277) 30A
Contactor (277) 50A
Fan Switch 3PDT
208/240 300-049197-003
Fan Relay
Remote Fan Switch 3PDT
Thermostat SP
7.5-45kW 072-303180-011
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
277
072-303180-019
072-303180-020
072-303180-019
072-303180-020
300-049197-003
072-303180-019
072-303180-020
292-057673-001
300-049197-003
072-303180-019
072-303180-020
292-057673-001
072-303180-019
072-303180-020
072-303180-019
292-057673-001
072-303180-019
072-303180-020
292-057673-001
300-049197-003
072-303180-019
072-303180-020
072-303180-019
292-057673-001
300-049197-003
G
G
H
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
All
292-057673-001
300-049197-003
072-303180-007
072-303180-008
315-304252-001
072-303180-007
072-303180-008
315-304252-001
300-049197-003
072-303180-007
072-303180-008
315-304252-001
300-049197-003
292-057673-001
072-303180-007
072-303180-008
315-304252-001
292-057673-001
072-303180-007
072-303180-008
315-304252-001
Case Back
Case Wrapper
W/O Fuse Door
Case Wrapper
With Fuse Door
043-130314-005
043-130315-004
043-130316-004
043-130317-004
043-130317-005
32-00 Contactor (120) 30A
Contactor (120) 50A
Transformer
32-40 Contactor (120) 30A
Contactor (120) 50A
Transformer
A, J, S
A, J
Thermostat SP
Thermostat SP
35-42 Contactor (277) 30A
Contactor (277) 50A
Remote Fan Switch 3PDT
35-43 Contactor (277) 30A
Contactor (277) 50A
Fan Relay
Remote Fan Switch 3PDT
35-44 Contactor (277) 30A
Contactor (277) 50A
Remote Fan Switch 3PDT
Thermostat SP
32-41 Contactor (120) 30A
Contactor (120) 50A
Transformer
H
I
Power Fuses (Used when heater exceeds 48 Amps)
B, K
B, K
Code
Description
Part No.
Thermostat SP
Fan Switch 3PDT
45-53
Fuse Block 600V 129-025643-001 (2)
“30-83, 30-23, 35-23, 40-23” Fuse Block 250V
32-42 Contactor (120) 30A
Contactor (120) 50A
Transformer
Remote Fan Switch 3PDT
32-43 Contactor (120) 30A
Contactor (120) 50A
Transformer
Fan Relay
Fan Relay
Remote Fan Switch 3PDT
32-44 Contactor (120) 30A
Contactor (120) 50A
Transformer
129-048473-001
128-026510-007 (6)
128-026510-006 (6)
128-026510-001 (6)
“30-83, 35-23, 40-23”
Fuse 60 Amp
Fuse 50 Amp
Fuse 35 Amp
H
I
30-23
45-43
35-45 Contactor (277) 30A
Contactor (277) 50A
Fan Relay
C, L, T
2.6-5kW 072-303180-011
7.5-45kW 072-303180-001
Remote Fan Switch 3PDT
Thermostat SP
All
All
All
All
All
All
292-057673-001
072-303180-007
072-303180-008
315-304252-001
292-057673-001
300-049197-003
For Contactor Rating, refer to Specification Table shown on Page 1.
Note: Number in parentheses () in the Part Number Column indicates
the quantity of that part required.
B, K
Remote Fan Switch
Thermostat SP
7
8
WIRING DIAGRAMS
C2
Elements
Stage 2
Elements
Stage 1
Elements
Stage 2
Elements
Optional Thermostat
Built-in Or
Field Installed
Field Wiring
Built-in Or Field Installed
Factory Wiring
T1T2T3
T1T2T3
C2
Motor
3Ø
C1
Contactor
Stage 1
Fuses
KTK-3
Fan Relay
Motor
3Ø
C3
C2
Optional Thermostat
Built-in Or
T1T2T3
C2
T1T2T3
Contactor
Field Installed
1
3
2
8
Standard Motor Connection
C1
Contactor
Cutouts
T1 T2 T3
C2
T1 T2 T3
C3
Contactor
(Typ.)
C1
7
9
10
12
Cutouts
2
8
1
3
7
Motor
3Ø
11
Fuses KTK-3
Fuses
9
10 11
C1
12
Fuses
(When Req'd)
Optional Summer
Fan Switch
(When Req'd)
AL3
BL3
BL2
AL2
AL1
To Elements
Stage 1
To Elements
Stage 2
AL3
BL3
Motor
3Ø
Built-in Or
AL2
AL1
Field Installed
BL1
BL2
Summer Fan Switch
Field Installed
Optional Disconnect
Switch Built-in Or
Field Installed
BL1
Note: Heater Requires
Fan Relay For 480V Motors
(See Fig. R)
Optional Disconnect
Switch Built-in Or
Field Installed
T1 T2
C1
T3
T1 T2
C2
T3
L1L2L3
L1 L2 L3
Not For Use With 480V
3 Phase
60 HZ Power
Built-in Or Field Installed
Factory Wiring
34-41 34-42 34-44
Standard Motor Connection
3 Phase,
60 HZ Power
34-43, 35-43 34-45, 35-45
Figure Q
Figure R
Field Installed
Built-in Or Field Installed
Factory Wiring
PRI.
PRI. XFMR 120V SEC.
24V SEC.
MOTOR
Elements
Field Installed
Built-in Or Field Installed
Factory Wiring
Elements
Stage 1
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
3Ø
Elements
Stage 2
Elements
H1
H2
X1 X2
X1
X2
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
Stage 2
Warning - First Stage Of
Thermostat Must Be
Connected To Terminals C1
& C2 To Insure That Motor
Will Be Energized With First
Stage Heat Operation
Stage 1
T1T2T3
C3
C2
C3
C4
Transformer
Color Code Index
T1T2T3
T1T2T3
T1T2T3
C2
C2
Contactor
Contactor
(Typ.)
Contactors
C2
C1
C1
Cutouts
XFMR
C1
Cutouts
C3
Warning - First Stage Of
Thermostat Must Be
X1
H1
X2
X1
X2
Stage 1
Stage 2
Fan
Note: For Single Stage
Thermostat, See Fig. J
Fuses KTK-3
Fuses
(When Req'd)
C1
Motor
3Ø
XFMR
Connected To Terminals C1 &
Heat
Fan
Stage 1
Stage 2
C2 To Insure That Motor Will
Be Energized With First Stage
Heat Operation
H2
H1
H2
Fuses KTK-3
Fuses
BL3
BL2
AL3
AL2
AL1
(When Req'd)
Transformer
Color Code Index
2 Stage Thermostat
(By Others)
2 PDT Switch
(By Others)
2 Stage Thermostat
(By Others)
AL3
BL3
BL2
AL2
AL1
BL1
PRI.
PRI. XFMR 120V SEC.
24V SEC.
Alternate Customer Hook Up (1 Stage)
Thermostat
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
BL1
Jumper
Disconnect
Switch Built-in Or
Field Installed
H1
H2
X1 X2
X1
X2
C1
Jumpers
Disconnect
Switch Built-in Or
Field Installed
C4
C2
C3
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
L1L2L3
Fan
L1 L2 L3
Thermostat
W/sub-base
(By Others)
1
2
3
4
Heat
3 Phase
60 Hz Power
32-00 30-00
3 Phase
60 HZ Power
30-43 32-43
Figure S
Figure T
Warning - First Stage Of Thermostat
Must Be Connected To Terminals C1 & C2
To Insure That Motor Will Be Energized
With First Stage Heat Operation
Elements
Stage 1
Elements
Stage 2
Elements
Warning - First Stage Of Thermostat
Must Be Connected To Terminals C1 & C2
To Insure That Motor Will Be Energized
With First Stage Heat Operation
Elements
Motor
3Ø
Fan
Relay
Stage 2
Stage 1
Field Installed
Built-in Or
Note: For Single Stage
Thermostat, See Fig. M
Fuses
KTK-3
C3
Field Installed
Factory Wiring
C4
C3
C2
C2
T1T2 T3
C1
T1T2 T3
Contactor
T1T2 T3
C2
T1T2T3
Cutouts
(Typ.)
C3
C2
Contactors
C1
C1
Cutouts
Stage 1
Heat
Fan
Stage 1
Stage 2
Motor
3Ø
Fan
C1
Fuses
(When Req'd)
Stage 2
Fuses KTK-3
Fuses
(When Req'd)
AL3
BL3
BL2
Control Power
(By Others)
AL2
AL1
2 Stage Thermostat
(By Others)
AL3
BL3
BL2
2 PDT Switch
(By Others)
AL2
AL1
BL1
2 Stage Thermostat
(By Others)
BL1
Alternate Customer Hook Up (1 Stage)
Thermostat
Optional Disconnect
Switch Built-in Or
Field Installed
Jumper
Optional Disconnect
C1
Jumpers
Switch Built-in Or
Field Installed
C4
Field Installed
Built-in Or Field Installed
Factory Wiring
L1 L2 L3
Fan
L1 L2 L3
C2
C3
Thermostat
W/sub-base
(By Others)
1
2
3
4
Heat
3 Phase,
60 HZ Power
3 Phase
60 HZ Power
34-43 35-43
31-00 33-00
Figure U
Figure V
Elements
Warning - First Stage Of Thermostat
Must Be Connected To Terminals C1 & C2
To Insure That Motor Will Be Energized
With First Stage Heat Operation
Elements
Stage 2
Field Installed
Built-in Or Field Installed
Factory Wiring
PRI.
PRI. XFMR 120V SEC.
24V SEC.
VOLT. LEAD CLRS. LEAD CLRS. LEAD CLRS.
Elements
Stage 2
Elements
H1
H2
X1 X2
X1
X2
Stage 1
208 BLK RED BLK WHT YEL BLU
240 BLK ORG BLK WHT YEL BLU
480 BLK BLK/RED BLK WHT YEL BLU
Transformer Color Code Index
Field Installed
Fan
Relay
Built-in Or
Field Installed
Factory Wiring
Stage 1
T1T2T3
C3
C4
C2
C3
C4
T1T2 T3
T1T2 T3
T1T2T3
C2
C2
Contactor
(Typ.)
Contactor
(Typ.)
C1
C2
C1
Warning - First Stage Of
Thermostat Must Be Connected
To Terminals C1 & C2
Cutouts
Cutouts
C3
C3
X1
H1
X2
H2
C1
Heat
Stage 1
Motor
3Ø
C1
Motor
3Ø
To Insure That Motor Will
Heat
Fan
XFMR
Stage 1
Stage 2
Fan
Be Energized With First
Stage Heat Operation
Stage 2
Fuses KTK-3
Fuses
Fuses KTK-3
Fuses
2 PDT Switch
(By Others)
2 Stage Thermostat
(By Others)
AL3 (When Req'd)
BL3
BL2
(When Req'd)
AL2
AL1
2 Stage Thermostat
(By Others)
BL3
BL2
AL3
2 PDT Switch
(By Others)
AL2
AL1
BL1
Alternate Customer Hook Up (1 Stage)
BL1
Alternate Customer Hook Up (1 Stage)
Thermostat
Jumper
Control Power
Thermostat
Jumper
(By Others)
C1
C4
C2
C3
Disconnect
Switch Built-in Or
Field Installed
Jumpers
C1
C4
C2
Optional Disconnect
Switch Built-in Or
Field Installed
Jumpers
L1 L2 L3
Fan
Thermostat
W/sub-base
(By Others)
1
2
L1 L2
L3
Fan
Thermostat
W/sub-base
(By Others)
1
2
3
4
Heat
3 Phase
60 HZ Power
3
4
Heat
C3
3 Phase
60 HZ Power
31-45 33-45
30-45 32-45
Figure X
Figure W
9
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
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