Schematic And Hookup Of T874A With Q674B. Used In Standard Applications; Schematic And Hookup Of T874A, D, F With Q674D. Used Standard Applications - Honeywell T874 Product Data

THERMOSTAT
1
H1 ANTICIPATOR
4
6
FALL
H1
8
9
RISE
C1
10
C1
ANTICIPATOR
11
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
Fig. 65. Schematic and hookup of T874A with Q674B. Used in standard applications.
THERMOSTAT
H1 ANTICIPATOR
FALL
H1
FALL
H2
H2 ANTICIPATOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
Fig. 66. Schematic and hookup of T874A,D,F with Q674D. Used in standard applications.
SUBBASE
AUTO
FAN
SWITCH
ON
SYSTEM
SWITCH
HEAT
OFF
COOL
FILTER
LED (RED)
SUBBASE
1
NO FAN
SWITCH
4
5
6
NO SYSTEM
SWITCH
8
9
10
11
107
T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
W1
NO. 1 HEAT RELAY
W2
B
HEAT DAMPER
RH
RC
COOL DAMPER
O
G
FAN RELAY
Y2
NO. 1 COMP. RELAY
Y1
X1
SERVICE LED
(YELLOW)
X2
HEAT RELAY 1
W1
HEAT RELAY 2
W2
RH
RC
Y2
Y1
SYSTEM COMPONENTS
L1
(HOT)
L2
L1
(HOT)
L2
1
M5976
SYSTEM COMPONENTS
L1
(HOT)
L2
1
L1
(HOT)
L2
1
M7011
60-2485—8