Schematic And Hookup Of T874F With Q674K. Used In Wood/Oil Applications; Schematic And Hookup Of T874C With Q674G. Used In Standard Applications - Honeywell T874 Product Data

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
FALL
H1
H2
1 POWER SUPPLY. PROVIDE DISCONECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 95. Schematic and hookup of T874F with Q674K. Used in wood/oil applications.
THERMOSTAT
H1
FALL
FALL
H2 ANTICIPATOR
H2
C1
RISE
C1 ANTICIPATOR
1
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 96. Schematic and hookup of T874C with Q674C. Used in standard applications.
60-2485—8
THERMOSTATS
1
H1 ANTICIPATOR
2
3
SYSTEM
4
SWITCH
FALL
5
WOOD/OIL
H2 ANTICIPATOR
6
1
FAN SWITCH
AUTO
ON
4
6
SYSTEM
SWITCH
8
OFF
AUTO
9
10
11
SUBBASE
NO FAN
SWITCH
OFF
WOOD
OIL
SUBBASE
ON LED
(YELLOW)
SERVICE
LED (RED)
122
SYSTEM COMPONENTS
L1
(HOT)
R
L2
1
OIL RELAY
W2
OIL LED
(RED)
X
WOOD LED
(GREEN)
WOOD RELAY
W1
M5984
SYSTEM COMPONENTS
W1
NO. 1 HEAT RELAY
W2
NO. 2
HEAT RELAY
B
RH
1
RC
O
FAN RELAY
G
NO. 1 COMPRESSOR
Y2
CONTACTOR
Y1
X
A
C
HEAT
DAMPER
L2
L1
(HOT)
COOL DAMPER
L2
L1
(HOT)
M104A