Honeywell T874 Product Data page 171

THERMOSTAT
H1
ANTICIPATOR
1
H1
FALL
4
H2
ANTICIPATOR
6
1
8
H2
FALL
9
CO
FALL
10
C1
ANTICIPATOR
C1
RISE
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
H2 HAS 10¡F FIXED SETBACK FROM H1 ON T874G1485, 0-12¡F
2
ADJUSTABLE ON T874G1535.
3
RESET IN MOMENTARY POSITION, SPRING RETURN TO OFF UPON
SWITCH RELEASE.
Fig. 163. Schematic and hookup of T874G with Q674C. Used in standard applications.
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
SUBBASE
L2
L1
(HOT)
FAN
SWITCH
AUTO
ON
SYSTEM
SWITCH
AUTO
OFF
RESET
1
SERVICE LED (RED)
ON LED (YELLOW)
171
SYSTEM COMPONENTS
HEAT DAMPER
1
B
HEAT RELAY 1
W1
FAN RELAY
G
HEAT RELAY 2
W2
R
S1
RESET CIRCUIT
COOL
CHANAGEOVER VALVE
O
S2 RESET CIRCUIT
Y
COMPRESSOR
RELAY
X
A
M1820C
C
60-2485—8