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Field Installed
Built-in Or Field Installed
Factory Wiring
Optional
Thermostat
Built-in Or
1 Phase 2 Or 3 Elem
Field Installed
C1
C2
2
1
3
C3
T1 T2 T3
7
C1
9
8
10 11
L1 L3
12
Optional
Summer Fan Switch
3 Phase Delta
Built-in Or Field
Installed
Motor
1Ø Or 3Ø
T1 T2 T3
C1
T1 T2 T3
C1
L1L2L3
Standard Motor Connection
Figure I
To Elements
To Elements
Stage 1
Stage 2
Optional
Motor
3Ø
Thermostat
Built-in Or
Field Installed
Cutouts
T3
T3
T1 T2
T1 T2
C1
C2
Standard Motor Connection
X1
X2
XFMR
H1
H2
Built-in Or Field Installed
Factory Wiring
Transformer Color Code Index
PRI.
24V
SEC.
PRI.
XFMR
120V
SEC.
VOLT
LEAD
CLRS
LEAD
CLRS.
LEAD
CLRS.
Note: Heater requires
H1
H2
X1
X2
X1
X2
Fan Relay for 480V
208
BLK
RED
BLK
WHT
YEL
BLU
Motors. (See Figure L)
240
BLK
ORG
BLK
WHT
YEL
BLU
Figure K
C3
C2
Control Power
(By Others)
Cutouts
C1
Optional Thermostat
Built-in Or
Field Installed
Field Installed
Built-in Or Field Installed
Factory Wiring
Figure M
C2
Optional Thermostat
Built-in Or
T1T2T3
T1T2T3
Field Installed
Contactor
C1
C2
(Single Stage)
Motor
3Ø
Standard Motor Connection
2
1
3
7
8
9
C4
10 11
C1
12
Control Power
Summer Fan Switch
(By Others)
Field Installed
Built-in Or Field Installed
Factory Wiring
Figure O
WIRING DIAGRAMS
To Element Wiring
Optional
Fan Relay
Motor
Built-in Or
1Ø Or 3Ø
Field
Cutout
Installed
T1 T2 T3
T1 T2 T3
C1
C3
3Ø Wiring Only
L1 L2 L3
Power
60 HZ
Optional Disconnect Switch
Built-in Or Field Installed
34-43,35-43 34-45,35-45
Elements
Elements
Motor
3Ø
Stage 1
Stage 2
Fuses KTK-3
1
2
3
T1
T2
T3
Contactor
T1
T2
T3
7
C1
C2
(Typ.)
8
9
10 11
12
Fuses
Optional Summer
(When Req'd)
Fan Switch
BL3
AL3
Built-in Or
AL2
Field Installed
BL2
AL1
BL1
Optional Disconnect
Switch Built-in Or
L1
L2 L3
Field Installed
30-41, 30-42, 30-44
3 Phase,
32-41, 30-42, 32-44
60 HZ Power
Elements
Elements
Motor
3Ø
Stage 1
Stage 2
Fuses
KTK-3
T1 T2 T3
T1
T2
Contactor (Typ.)
C1
C2
Fuses
(When Req'd)
AL3
AL2
BL1
AL1
L3
Optional Disconnect
3 Phase,
L2
Switch Built-in Or
60 HZ Power
L1
Field Installed
31-00, 33-00 31-40, 33-40
Elements
Elements
Stage 2
Stage 1
Fan Relay
C3
C2
T1T2T3
T1T2T3
Contactor
Contactor
C2
C1
C3
Cutouts
Motor
3Ø
Fuses KTK-3
Fuses
(When Req'd)
AL2 AL3
BL2
AL1
BL1
Optional Disconnect
Switch Built-in Or
L1
L2
L3
Field Installed
3 Phase
For Use With 480V
60 HZ Power
31-43,33-43 31-45,33-45
Field Installed
Built-in Or Field Installed
Factory Wiring
Optional
Thermostat
Built-in Or Field Installed
Transformer Color Code Index
PRI.
PRI. XFMR
120V SEC.
LEAD CLRS.
LEAD CLRS.
VOLT.
H1
H2
X1
X2
208
BLK
RED
BLK
WHT
240
BLK
ORG
BLK
WHT
480
BLK
BLK/RED
BLK
WHT
C2
T1T2T3
T1T2T3
Contactor
C1
C2
Motor
3Ø
Standard Motor Connection
Summer Fan Switch
Transformer Color Code Index
PRI.
PRI. XFMR
120V SEC.
VOLT.
LEAD CLRS.
LEAD CLRS.
LEAD CLRS.
H1
H2
X1
X2
208
BLK
RED
BLK
WHT
240
BLK
ORG
BLK
WHT
480
BLK
BLK/RED
BLK
WHT
Field Wiring
Built-in Or Field Installed
Factory Wiring
C3
C2
Control Power
(By Others)
T3
C1
To Elements
To Elements
Stage 1
Stage 2
Motor
3Ø
BL3
BL2
C1
C2
Standard Motor
Connection
Warning - First Stage Of Thermostat Must
Be Connected To Terminals C1 & C2 To
Insure That Motor Will Be Energized With
First Stage Heat Operation
C3
C2
C1
Stage 1
Alternate
BL3
1 Stage
Stage 2
Thermostat
(by Others)
2 Stage Thermostat
(By Others)
Customer Wiring
Factory Wiring
6
Elements
Stage 1
T1 T2 T3
Contactor (Typ.)
C1
X1
X2
Cutouts
XFMR
H1
H2
AL3
AL2
24V SEC.
LEAD CLRS.
AL1
X1
X2
Optional Disconnect
YEL
BLU
Switch Built-in Or
YEL
BLU
Field Installed
YEL
BLU
30-00, 32-00 30-40, 32-40
Figure J
Optional Thermostat
Built-in Or
Elements
Field Installed
Stage 1
C3
Cutouts
C2
T1T2T3
Contactor
C1
2
1
3
C1
7
9
8
X1
X2
10 11
12
AL2 AL3
XFMR
AL1
H2
H1
Optional Disconnect
24V SEC.
Switch Built-in Or
Field Installed
Field Wiring
X1
X2
Built-in Or Field Installed
YEL
BLU
Factory Wiring
YEL
BLU
For Use With 480V
YEL
BLU
30-43,32-43 30-45,32-45
Figure L
Elements
Stage 1
T1
T2
T3
C1
Contactor
Cutouts
(Typ.)
Fuses
Optional Thermostat
(When Req'd)
AL3
AL2
Built-in Or
Field Installed
AL1
Note: Heater Requires
Fan Relay For 480V Motors
(See Fig. O)
L1
L2 L3
3 Phase,
31-41, 33-41 31-44, 33-44
60 HZ Power
Figure N
Elements
Stage 1
C3
C2
Contactor (Typ.)
C1
Cutouts
C1
AL1
AL2
AL3
3 Phase,
60 HZ Power
34-00, 35-00, 34-40, 35-40
Figure P
Elements
Motor
3o
Stage 2
Fuses
KTK-3
T1
T2
T3
C2
Fuses
(When Req'd)
BL3
BL2
BL1
L3
3 Phase,
L2
60 HZ Power
L1
Elements
Fan Relay
Stage 2
T1T2T3
Contactor
C2
C3
Motor
3Ø
Fuses KTK-3
Fuses
(When Req'd)
BL3
BL2
BL1
L1
L2
L3
3 Phase
60 HZ Power
Elements
Motor
3Ø
Stage 2
Fuses KTK-3
2
1
3
T1
T2
T3
7
C2
9
8
10 11
12
Optional Summer
BL3
Fan Switch
Built-in Or
BL2
Field Installed
BL1
Optional Disconnect
Switch Built-in Or
Field Installed
Elements
Motor
3Ø
Stage 2
Fuses
KTK-3
C2
Fuses
(When Req'd)
Fused Switch
(By Others)
BL1
BL2
BL3
3 Phase,
60 HZ Power
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