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Typical wiring hookup of CT70 with jumper intact.
M8504
W2
W1
X
O
E
G
Y1
R
L
B
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
REMOVE W1-Y1 JUMPER WHEN HEAT RELAY 1 IS USED.
WHEN L TERMINAL IS CONNECTED TO SYSTEM MONITOR, EM. HEAT. LED
ALSO INDICATES COMPRESSOR MALFUNCTION.
X TERMINAL MUST BE CONNECTED FOR PROPER OPERATION.
1
2
3
4
COMPRESSOR
CONTACTOR
FAN RELAY
EM. HEAT
RELAY
CHANGEOVER
RELAY (HEAT)
HEAT RELAY 1
CHANGEOVER
RELAY (COOL)
AUX. HEAT
RELAY
SYSTEM
MONITOR
2
3
4