T834C, T8034C HEATING/COOLING THERMOSTATS
5
68-0075-2
To wire and mount thermostat.
1.
In replacement applications, check existing thermostat
wires for cracked or frayed insulation. Replace any
wires in poor condition.
NOTE: If wire is plastered into the wall, make a hole next to
the wires and loosen them so they can be pushed
back into the wall later.
2.
In new installations, run wiring, if necessary, to the
thermostat location.
3.
Connect the wires to the terminals on back of thermo-
stat. See Fig. 5-9 for internal schematics and typical
hookup diagrams.For systems requiring thermostat
control of fan operation in heat (some electric heat
applications), jumper terminals 1 and 2. See Fig. 3.
4.
Remove thermostat cover by pulling outward on right or
left edge of cover until it snaps free of thermostat base.
Carefully remove and discard foam plastic shipping
insert protecting switch and bimetal assembly during
shipping.
5.
Set the adjustable heat anticipator indicator to match
the current draw of the primary heating control (see
Heat Anticipator Setting).
6.
Push excess wire back through the hole and plug any
opening with insulation to prevent drafts that can affect
thermostat performance.
7.
Loosely fasten the thermostat and wallplate, if applica-
ble, to the wall or outlet box with a screw through the left
mounting hole. Adjust thermostat so it is approximately
level and start the second screw through the right
mounting hole. Do not tighten.
8.
Level the thermostat exactly using a level device.
Tighten the mounting screws.
IMPORTANT
This thermostat is calibrated at the factory, mounted
at true level. Any inaccuracy in leveling during the
mounting causes control point deviation.
9.
Replace thermostat cover.
Fig. 5. Internal schematic and typical hookup diagram for standard heating-cooling systems.
Fig. 6. Internal schematic and typical hookup diagram for gas-fired, oil-fired, or central electric heat applications.
(Jumper terminals 1 and 2 to control fan operation from thermostat during heating
when using thermostat in electric heat applications.)
H1
TEMP. FALL
C1
L1
(HOT)
L2
1
L1
(HOT)
L2
1
1
2
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
IN SINGLE TRANSFORMER SYSTEMS, JUMP RC AND RH.
HEAT RELAY
COOL RELAY
FAN RELAY
FAN SWITCH
ON
AUTO
COOL
OFF
HEAT
COOL
OFF
HEAT
SYSTEM
SWITCH
C1
ANTICIPATOR
H1
ANTICIPATOR
M2043C
W
RH
Y
G
RC
H1
TEMPERATURE 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
CI
ANTICIPATOR
HI
ANTICIPATOR
M2035A
W
2
1
Y
G
R