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Fig. 8—T874D/Q674D in standard heating/cooling system.
FALL
H1
H1 ANTICIPATOR
H2
FALL
C1
RISE
C2
RISE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2
JUMPER RC, RH FOR SINGLE TRANSFORMER.
3
B TERMINAL OPTIONAL.
Fig. 9—T874D/Q674E in standard heating/cooling system.
FALL
H1
H1 ANTICIPATOR
H2 ANTICIPATOR
FALL
H2
RISE
C1
C1
ANTICIPATOR
C2 ANTICIPATOR
RISE
C2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
JUMPER RC, RH FOR SINGLE TRANSFORMER.
H2 ANTICIPATOR
C1 ANTICIPATOR
C2 ANTICIPATOR
FAN
SWITCH
AUTO
SYSTEM
SWITCH
3
NO
FAN
SWITCH
NO
SYSTEM
SWITCH
ON
OFF
HEAT
AUTO
COOL
5
RH
B
HEAT RELAY 1
1
W1
HEAT RELAY 2
W2
2
Y2
COMPRESSOR
CONTACTOR 2
Y1
COMPRESSOR
CONTACTOR 1
RC
RH
HEAT RELAY 1
W1
HEAT RELAY 2
W2
2
O
B
G
FAN RELAY
Y2
COMPRESSOR
CONTACTOR 2
Y1
COMPRESSOR
CONTACTOR 1
RC
L1
(HOT)
L2
L2
L1
(HOT)
M3667
L1
(HOT)
1
L2
L1
(HOT)
1
L2
M934
60-1227—1
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