60-1147-4 4
Fig. 6—Internal schematic and typical wiring diagram for T874N and Q674F.L1
HOT
L2
1
W1
W2
EM. HEAT
LED (RED)
CHECK
LED
(GREEN)
FAN RELAY
G
EM. HEAT
RELAY
COMPRESSOR
CONTACTOR
Y
E
SYSTEM
SWITCH
EM. HT.
HEAT
OFF
COOL
H1
ANTICIPATOR
H1
H2
H2
ANTICIPATOR
1POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
M3686
FALL
R
RISE L
C1
HEAT
RELAY 3
EM.HT. RELAY
CONTACT
OUTDOOR
THERMOSTAT
AUTO
ON
FAN SWITCH
X
W3
OPTIONAL
COMPRESSOR
FAILURE DEVICE
DEFROST
RELAY REVERSING
VALVE
EM.HT. RELAY
CONTACT
HIGH
PRESSURE
SWITCH
HEAT
RELAY 1
HEAT
RELAY 2
AUTO
FALL
C0
C1
ANTICIPATOR