69-0444—10
3
T834B; T834C; T834J HEATING-COOLING THERMOSTATS
H1
TEMP. FALL
C1
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
IN ELECTRIC HEAT APPLICATION, JUMPER 1 AND 2 FOR AUTO FAN IN HEATING.
HEAT RELAY
COMPRESSOR
CONTACTOR
FAN RELAY
FAN SWITCH
ON
AUTO
COOL
OFF
HEAT
COOL
OFF
HEAT
SYSTEM
SWITCH
C1
ANTICIPATOR
H1
ANTICIPATOR
M2035A
W
2
1
Y
G
R
Fig. 4. Internal schematic and typical hookup for T834C dual fuel model
in a gas- or oil-fired, or central electric heat system.
H1
TEMP. FALL
C1
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
INSTALL JUMPER BETWEEN W AND Y TERMINALS
WHEN HEAT RELAY IS NOT USED.
HEAT RELAY
FAN RELAY
FAN SWITCH
ON
AUTO
COOL
OFF
HEAT
COOL
OFF
HEAT
SYSTEM
SWITCH
C1
ANTICIPATOR
H1
ANTICIPATOR
M1037C
W
O
B
Y
G
R
CHANGEOVER
RELAY (COOL)
CHANGEOVER
RELAY (HEAT)
COMPRESSOR
CONTACTOR
Fig. 5. Internal schematic and typical hookup for T834C in heat pump system with supplementary heat.
Fig. 6. Internal schematic and typical hookup for T834C gas or oil-fired systems and single-stage
heat pump or central electric heat.
H1
TEMPERATURE
FALL
C1
L1
(HOT)
L2
1
1
2
2
3
3
4
4
POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
JUMPER 1-Y FOR AUTO FAN IN COOLING ONLY.
JUMPER 1-2 FOR AUTO FAN WITH WAND Y.
JUMPER W-Y FOR SINGLE-STAGE HEAT PUMP.
HEAT RELAY
FAN RELAY
FAN SWITCH
ON
AUTO
COOL
OFF
HEAT
COOL
OFF
HEAT
SYSTEM
SWITCH
C1
ANTICIPATOR
H1
ANTICIPATOR
M11342A
W
Y
B
O
2
G
1
R
CHANGEOVER
RELAY (HEAT)
CHANGEOVER
RELAY (COOL)
COMPRESSOR
RELAY
