507621-01
Issue 1720
Page 15 of 23
Figure 18. Typical Wiring Diagram
WARNING
USE COPPER CONDUCTORS
ONLY
15 AMP
SUPPLY
VOLTAGE
L1
L2 OR
NEUT.
WIRING DIAGRAM: NO HEAT
WIRE NUTS
BY OTHERS
14 GR
N
2
14
BL
K
1
TO
GROUND LUG
14
YEL(240V
)
14
WHT(120V)
6-PIN
PLUG
6
14 YEL(COM)
14 BLK(HI)
14 RED(LO)
2
YEL
1
CAP
MTR
BLK
RED
3
BRN/WHT
BRN
GND
+
120V
OR
220V
4
1
5 6
2 3
1st STAGE
C
24
18 BLK
20 KW = HE1,HE2,HE3 & HE4
15 KW = HE1,HE2 & HE3
7.5 & 10 KW = HE1 & HE2
5 KW = HE1
HEATERS USED
2nd STAGE
1st STAGE
L2B
L1B
(OPT.)
TB = TERMINAL BLOCK
GND.
12 BLK
12 BLK
12 YEL
HE
3
LS3
HE
4
LS4
12 YEL
1
3
2
4
18
BL
U
SEQUENCER 2
CIRCUIT BREAKER 2
12 BLK
3
2
6
5
1
4
HE
1
HE
2
LS1
LS2
12 BLK
12 YEL
12 YEL
6-PIN
PLUG
3
14
RE
D
(OPT.)
LOCATION
PLUG PIN
SEQUENCER 1
1
4
5
3
12 BLK
12 BLK
GND
CIRCUIT
BREAKER 1
L1A
L2A
5
18
WH
T
4
14 GR
N
18
BL
U
2
1
14
YEL
14
BL
K
CONTROL (FIELD WIRED)
CONTROL (FACTORY WIRED)
POWER (FIELD WIRED)
POWER (FACTORY WIRED)
GROUND LUG
TO BLOWER
BE 24 VOLT, N.E.C. CLASS 2
CONTROL CIRCUIT WIRING TO
WIRING DIAGRAM - ELECTRIC HEAT
HE = HEATER ELEMENT
LS = LIMIT SWITCH
GND = GROUND LUG
CB = CIRCUIT BREAKER
SEQ = SEQUENCER
TR = TRANSFORMER
TD = TIME DELAY (OPT.)
BR = BLOWER RELAY
MTR = BLOWER MOTOR
GND = GROUND CONNECTION
CAP = MOTOR CAPACITOR
W2
BLU
WHT
GRN
RED
BY
OTHERS
THERMOST
AT
TO
W1
C
18 BLU
18 WHT
G
R
18 GRN
18 RED
BLK
14
YE
L
L2
14
BLK
L1
24
V
COM
208V
18
BL
U
240V
14
BL
K
1
3
5
2
6
4
18
BLU
6
5
4
3
2
1
18 GR
N
18 BLK
14
RE
D
18 BLU
18 RED
**
220
208/240
VOLTAGE
BY OTHERS
PART NO. 067203400
12 BLK
12 BLK
1
2
3
5
14 BLUE (MED)
BLUE
4
#
18
BL
U
18 WHT
18 BLU
12 YEL
12 YEL
18
BL
K
18
BL
K
14 RED
TRANSFORMER
BLOWER REALY
TIME DELAY
***SEQ4
***SEQ3
*** SEQUENCER USED: WIRED AS SHOWN
RELAY USED: WIRED PER RELAY POLE
TO BREAK CIRCUIT
NO DEVICE PRIOR TO 10-15-2014
2
6
THREE POLE SEQUENCER
TIMING - SEC
ON
1-20
20-60
20-60
OFF
40-110
1-30
1-30
1
2
3
4
1
2
3
4
TWO POLE SEQUENCER
TIMING - SEC
ON
30-90
30-90
OFF
1-30
1-30
# FACTORY SPEED SET TO MEDIUM (BLUE) FOR -018, -024, -030, -036,
-042, AND -060. FACTORY SPEED SET TO LOW (RED) FOR -048
