T834C HEATING AND COOLING THERMOSTAT
69-1688
2
Location
Locate the thermostat about 5 ft (1.5m) above the floor
on an inside wall in an area with good air circulation at
average temperature.
Do not mount the thermostat where it can be affected by:
— drafts or dead spots behind doors or in corner.
— hot or cold air from ducts.
— radiant heat from the sun, fireplaces or appliances.
— unheated (uncooled) areas such as outside walls
behind the thermostats.
This thermostat is a precision instrument and was
carefully adjusted at the factory.
Handle it carefully.
Wiring and Mounting
CAUTION
Electrical Shock Hazard.
Can cause personal electrical shock and
equipment damage.
Disconnect power supply before beginning
installation.
IMPORTANT
All wiring must comply with local codes and
ordinances.
The T834C can be mounted directly on a wall or vertical
outlet box:
Use the 209649A (taupe) or 209650A (white)
Universal Cover Plate (ordered separately) to mount
on outlet box or to cover wall marks left by old
thermostat.
If the cover plate is used, review the instructions pro-
vided with it before wiring and mounting the
thermostat.
To wire and mount the thermostat:
1.
In replacement applications, check the existing
thermostat wires for cracked or frayed insulation.
Replace any wires in poor condition. If the wire is
plastered into the wall, make a hole next to the
wires and loosen the wires so they can be pushed
back into the wall later.
2.
In new installations, run wiring (if necessary) to the
thermostat location.
3.
Set the adjustable heat anticipator indicator to
match the current draw of the primary heating
control or as recommended by the equipment
manufacturer (see Heat Anticipator Setting).
4.
Connect the wires to the terminals on the back of
the thermostat. See Fig. 2 for internal schematic
and typical hookup diagram.
5.
Remove thermostat cover by pulling outward on
right edge of cover until it snaps free of the
thermostat base. Carefully remove and discard the
foam plastic shipping insert that protects the switch
and bimetal assembly during shipping.
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 (with wallplate, if
applicable) to the wall or outlet box with a screw
through the top mounting hole. Adjust the
thermostat so it is approximately level and fasten
the second screw through the bottom mounting
hole. Do not tighten.
8.
For optimum performance, level the thermostat
using a spirit level or plumb line. Tighten the
mounting screws.
9.
Adjust temperature setting lever so mercury bulb is
in horizontal position as shown in Fig. 1.
10.
Carefully replace the thermostat cover.
IMPORTANT
An incorrectly leveled thermostat causes the
temperature control to deviate from setpoint.
Fig. 2. Internal schematic and typical hookup for T834C in standard heating-cooling system.
H1
TEMP. FALL
C1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
HEAT RELAY
COOL
OFF
HEAT
COOL
OFF
HEAT
SYSTEM
SWITCH
C1
ANTICIPATOR
M21181
W
L1
(HOT)
L2
1
FAN RELAY
FAN
SWITCH
ON
AUTO
G
R
COOL RELAY
Y
69-1688.fm Page 2 Tuesday, May 6, 2003 10:05 AM
