Schematic And Hookup Of T874C, D With Q674F. Used In Standard Applications - Honeywell T874 Product Data

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
THERMOSTAT
FALL
H1
H1
ANTICIPATOR
FALL
H2
H2
ANTICIPATOR
RISE
C1
C1
ANTICIPATOR
C2
C2
ANTICIPATOR
RISE
Fig. 141. Schematic and hookup of T874C with Q674F. Used in standard applications.
THERMOSTAT
FALL
H1
H1 ANTICIPATOR
H2 ANTICIPATOR
FALL
H2
RISE
C1
C1
ANTICIPATOR
C2
ANTICIPATOR
RISE
C2
Fig. 142. Schematic and hookup of T874C,D with Q674F. Used in standard applications.
60-2485—8
FAN
SWITCH
1
AUTO
ON
4
6
SYSTEM
SWITCH
OFF
EM. HT.
8
HEAT
9
AUTO
COOL
10
11
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
FAN
SWITCH
AUTO
1
ON
4
6
SYSTEM
SWITCH
OFF
EM. HT.
HEAT
8
AUTO
9
COOL
10
11
1
POWER SUPPLY. PROVIDE DISCONECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
SUBBASE
R
W1
G
W2
EM. HT. LED
(RED)
X2
E
Y2
Y1
SUBBASE
156
SYSTEM COMPONENTS
HEAT RELAY 1
FAN RELAY
HEAT RELAY 2
EM. HT. RELAY
COMPRESSOR
CONTACTOR 2
COMPRESSOR
CONTACTOR 1
M8376
SYSTEM COMPONENTS
R
W1
HEAT RELAY 1
W2
HEAT RELAY 2
B
X2
CHECK
X1
LED (RED)
E
EM. HT. RELAY
G
FAN RELAY
Y2
COMPRESSOR
CONTACTOR 2
Y1
COMPRESSOR
CONTACTOR 1
O
L1
(HOT)
L2
1
L1
(HOT)
L2 1
M5985