Schematic And Hookup Of T874A-D With Q674A. Used In Standard Applications; Schematic And Hookup Of T874D, E, F With Q674R. Used In Standard Applications - Honeywell T874 Product Data

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
THERMOSTAT
H1
ANTICIPATOR
H1
FALL
H2
FALL
H2 ANTICIPATOR
RISE
C1
C1 ANTICIPATOR
C2 ANTICIPATOR
C2
RISE
Fig. 71. Schematic and hookup of T874A-D with Q674A. Used in standard applications.
THERMOSTAT
H1 ANTICIPATOR
FALL
H1
H2 ANTICIPATOR
H2
FALL
RISE
C1
C1 ANTICIPATOR
C2 ANTICIPATOR
C2
RISE
Fig. 72. Schematic and hookup of T874D,E,F with Q674C. Used in standard applications.
60-2485—8
1
4
6
8
9
10
11
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 JUMPER RH, RC FOR SINGLE TRANSFORMER.
1
AUTO
4
6
8
9
10
11
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 JUMPER TERMINALS RC-RH FOR SINGLE SYSTEM TRANSFORMER ONLY.
3 B,O TERMINALS ON SOME MODELS.
SUBBASE
FAN SWITCH
AUTO
ON
SYSTEM
SWITCH
HEAT
AUTO
COOL
3 OPTIONAL LED ON SOME MODELS.
SUBBASE
FAN
SWITCH
ON
SYSTEM
SWITCH
OFF
AUTO
110
SYSTEM COMPONENTS
RH
CHECK
HEAT RELAY 1
3
W1
HEAT RELAY 2
W2
X1
G
FAN RELAY
2
Y2
COMPRESSOR
CONTACTOR 2
Y1
COMPRESSOR
CONTACTOR 1
RC
SYSTEM COMPONENTS
RH
2 W1
HEAT RELAY 1
W2
HEAT RELAY 2
B
HEAT DAMPER
3
O
COOL DAMPER
G
FAN RELAY
Y2
COMPRESSOR
CONTACTOR 2
Y1
COMPRESSOR
CONTACTOR 1
2
RC
L1
(HOT)
L2
1
L2
L1
(HOT)
1
M932B
L1
(HOT)
L2
1
1
L2
L1
(HOT)
M5122A