Schematic And Hookup Of T874F With Q674D. Used In Wood/Coal Applications - Honeywell T874 Product Data

T874 MULTISTAGE THERMOSTATS AND Q674 SUBBASES
THERMOSTAT
H2
H2 ANTICIPATOR
FALL
H1
H1 ANTICIPATOR
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 63. Schematic and hookup of T874F with Q674D. Used in wood/coal applications.
THERMOSTAT
H1
ANTICIPATOR
H1
FALL
2
C1
ANTICIPATOR
RISE
C1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 SINGLE SETPOINT LEVER AND BIMETAL.
Fig. 64. Schematic and hookup of T874A with Q674Q. Used in fan coil applications.
60-2485—8
SUBBASE
NO FAN
FALL
SWITCH
1
NO
4
SYSTEM
SWITCH
8
9
10
SUBBASE
1
SYSTEM
SWITCH
HEAT
2
OFF
COOL
3
4
FAN
SWITCH
5 LO
MED
HIGH
ON
SYSTEM COMPONENTS
AUX. HT. RELAY
W2
R
YELLOW
C
GREEN
W1
WOOD/COAL
RELAY
W1
HEAT RELAY 1
B
R
K1 RELAY
G1
G2
O RELAY
O
COMPRESSOR CONTACTOR
Y1
106
1
HEAT/COOL
SWITCH
M3725
SYSTEM COMPONENT
B RELAY
1
L1
(HOT)
L2
L2
K2 RELAY
K1
K2
HI
3-SPEED FAN SCHEMATIC
L1
(HOT)
L2
L1
K1
K2
K2
LO
MED
M8005