Schematic And Hookup Of T874A, D, F With Q674D. Used In Standard Applications; Schematic And Hookup Of T874C With Q674D. Used In Standard Applications - Honeywell T874 Product Data

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
H1 ANTICIPATOR
FALL
RISE
C2
RISE
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2
JUMPER RC, RH FOR SINGLE TRANSFORMER.
3 B AND 5 TERMINALS AVAILABLE ON SOME MODELS.
Fig. 55. Schematic and hookup of T874A,D,F with Q674D. Used in standard applications.
FALL
H1
H1 ANTICIPATOR
H2
FALL
C1 ANTICIPATOR
RISE
C1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 56. Schematic and hookup of T874C with Q674B. Used in standard applications.
60-2485—8
THERMOSTAT
FALL
H1
1
4
3
H2 ANTICIPATOR
5
6
H2
8
C1
9
C1 ANTICIPATOR
10
C2 ANTICIPATOR
11
1
4
H2 ANTICIPATOR
6
8
9
10
11
SUBBASE
3
NO
FAN
SWITCH
NO
SYSTEM
SWITCH
SUBBASE
FAN
RESET
SWITCH
LED (RED)
AUTO
ON
SYSTEM
SWITCH
HEAT
OFF
COOL
102
SYSTEM COMPONENTS
L1
RH
(HOT)
L2
B
HEAT RELAY 1
1
W1
HEAT RELAY 2
W2
2
COMPRESSOR
CONTACTOR 2
Y2
COMPRESSOR
CONTACTOR 1
Y1
L2
RC
L1
(HOT)
M3667A
SYSTEM COMPONENTS
RESET
X
FAN RELAY
G
R
AUX. HT. RELAY
W2
B
B RELAY
O
O RELAY
Y2
COMPRESSOR
CONTACTOR 1
Y1
L1
(HOT)
L2
1
M5975