Schematic And Hookup Of T874A With Q674E. Used In Standard Applications - Honeywell T874 Product Data

THERMOSTAT
H1 ANTICIPATOR
H1
FALL
H2
H2
ANTICIPATOR
FALL
RISE
C1
C1
ANTICIPATOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 211. Schematic and hookup of T874G with Q674F. Used in standard applications.
THERMOSTAT
H1
FALL
H1 ANTICIPATOR
H2
H2
ANTICIPATOR
FALL
C1
RISE
C1 ANTICIPATOR
C2 ANTICIPATOR
C2
RISE
Fig. 212. Schematic and hookup of T874A with Q674E. Used in standard applications.
SUBBASE
2
FAN SWITCH
AUTO
3
ON
SYSTEM
4
SWITCH
OFF
6
EM. HT.
HEAT
8
AUTO
COOL
10
SUBBASE
1
FAN
SWITCH
AUTO
ON
4
6
SYSTEM
SWITCH
8
OFF
HEAT
9
AUTO
COOL
10
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
11
2 RC -RH REMOVABLE JUMPER WHEN SPECIFIED.
199
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
W1
G
R
W2
AUX. HT.
LED
(GREEN)
X
EM. HT.
L
LED (RED)
Y1
W1
W2
RH
RC
Y2
Y1
SYSTEM COMPONENTS
L1
(HOT)
L2
W1 RELAY
FAN RELAY
AUX. HT. RELAY
COMPRESSOR
FAULT
COMPRESSOR
M2989
CONTACTOR
SYSTEM COMPONENTS
L1
HEAT RELAY 1
(HOT)
L2
HEAT RELAY 2
2
FAN RELAY
G
COMPRESSOR
CONTACTOR 2
COMPRESSOR
L1
CONTACTOR 1
(HOT)
L2
M2990
60-2485—8
1
1
1