Schematic And Hookup Of T874D With Q674F. Used In Standard Applications - Honeywell T874 Product Data

THERMOSTAT
FALL
H1
1
H1 ANTICIPATOR
4
FALL
6
H2
H2 ANTICIPATOR
8
RISE
C1
9
10
C1 ANTICIPATOR
C2 ANTICIPATOR
11
RISE
C2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
Fig. 166. Schematic and hookup of T874D with Q674F. Used in standard applications.
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
SUBBASE
FAN
SWITCH
AUTO
ON
SYSTEM
SWITCH
OFF
EM. HT.
HEAT
AUTO
COOL
173
SYSTEM COMPONENTS
W1
AUX. HT. LED
(GREEN)
X
EM. HT. LED
(RED)
W2
RH
L
SYSTEM
MONITOR
E
G
RC
COMRESSOR CONTACTOR 1
Y1
COMRESSOR CONTACTOR 2
Y2
L1
(HOT)
1
L2
HEAT RELAY 1
HEAT RELAY 2
EM. HT. RELAY
FAN RELAY
L2
1
L1
(HOT)
M5728
60-2485—8