Honeywell T874 Product Data page 209

THERMOSTAT
1
FALL
H1
H1
ANTICIPATOR
4
6
H2
ANTICIPATOR
H2
FALL
8
C1 RISE
9
10
11
C2
RISE
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 225. Schematic and hookup of T874D with Q674C. Used in standard applications.
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
SUBBASE
FAN
SWITCH
AUTO
ON
SYSTEM
SWITCH
OFF
AUTO
SERVICE
LED (RED)
209
SYSTEM COMPONENTS
CONTROL MODULE
HEAT RELAY #1
W1
HEAT RELAY #2
W2
HEAT DAMPER
B
L1
RH
(HOT)
L2
L2
L1
RC
(HOT)
COOL DAMPER
O
FAN RELAY
G
COMPRESSOR CONTACTOR #2
Y2
COMPRESSOR CONTACTOR #1
Y1
SYSTEM MONTIOR
A
1
1
M5928
60-2485—8