Service Manual

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
WIRING DIAGRAMS
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS
UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO
DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
EHK*-20
COMPONENT CODE
PC = 9 PIN CONNECTOR
HTR = HEATER ELEMENT
TL = THERMAL LIMIT
RS = RELAY/SEQUENCER
FL = FUSE LINK
OP = OVERLOAD PROTECTION
LOW VOLTAGE
W
IRING CODE:
HIGH VOLTAGE
CT = CONTACTOR
L1
OP
L3
OP
BK
RD
YL
RS 1
M2
M1
9
WH
8
7
6
BL
5
4
3
2
PC
1
BK
FL
HTR 3
FL
FL
HTR 2
HTR 1
TL
TL
TL
RD
RD
L2
OP
BK
FL
HTR 6
FL
FL
HTR 5
HTR 4
TL
TL
TL
RD
PU
PU
YL
YL
RD
BK
YL
BK
CT1
CT2
WH
WH
BL
BL
EHK3-18, EHK4-18, EHK7-18
MODEL -
EHK3-20, EHK4-20, EHK7-20
LC
1
2
LC
1
2
LC
1
2
LC
1
2
LC
1
2
LC
1
2
BK
BK
BK
BK
BK
BK
0140L04067-A
EHK3 - 20 HEAT KIT - 20KW
EHK4 - 20 HEAT KIT - 20KW
EHK7 - 20 HEAT KIT - 20KW
FOR UNITS WITH SERIALS 1409 AND NEWER
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