Schematic And Hookup Of T874D With Q674K. Used In Standard Applications; Schematic And Hookup Of T874D With Q674G. Used In Standard Applications - Honeywell T874 Product Data

THERMOSTAT
FALL
H1
H1 ANTICIPATOR
H2
ANTICIPATOR
H2 FALL
RISE
C1
C1 ANTICIPATOR
C2 ANTICIPATOR
RISE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
C2
PROTECTION AS REQUIRED.
Fig. 93. Schematic and hookup of T874D with Q674K. Used in standard applications.
THERMOSTAT
H1 ANTICIPATOR
FALL
H1
H2 ANTICIPATOR
H2
FALL
C1
RISE
C1 ANTICIPATOR
C2 ANTICIPATOR
C2
RISE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
Fig. 94. Schematic and hookup of T874D with Q674G. Used in standard applications.
SUBBASE
1
NO FAN
SWITCH
4
6
SYSTEM
SWITCH
8
OFF
HEAT
AUTO
9
COOL
10
11
SUBBASE
1 NO FAN
SWITCH
4
6
8
SYSTEM
SWITCH
9
OFF
AUTO
10
11
121
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
SYSTEM COMPONENTS
W1
W2
RH
Y1
RC
Y2
B
W1
W2
RH
RC
FILTER
LED (YELLOW)
X
A
SERVICE
LED (RED)
Y1
COMPRESSOR
CONTACTOR 2
Y2
O
T
HEAT FAN RELAY
HEAT RELAY
L1
(HOT)
L2 1
COMPRESSOR
CONTACTOR 1
L1
(HOT)
L2
1
COMPRESSOR
CONTACTOR 2
M4664
SYSTEM COMPONENTS
HEAT CHANGEOVER
VALVE
HEAT
HEAT
RELAY 2
RELAY 1
L2 1
L1
(HOT)
L1
(HOT)
L2 1
COMPRESSOR
CONTACTOR 1
COOL CHANGEOVER
VALVE
"T" RELAY
M7013
60-2485—8