Thermostat Installation - Williams 3508232 Owner's Manual

Installing Your Furnace

Thermostat Installation

1. If an old thermostat is being replaced and is in a satisfactory
location and the wiring appears to be in good condition, use
existing wiring. If in doubt, use new wire.
2. If a new location is chosen or if this is a new installation,
thermostat cable must first be run to the location selected. All
wiring must agree with local codes and ordinances. These
instructions cover bringing the wire down from the attic but it
can be run from a basement or crawl space using similar
methods. Refer to Fig. 24.
3. Before drilling a hole in the wall at selected location, drive a
small finishing nail through the ceiling in the corner of the wall
and ceiling above the thermostat location. Pull the nail out and
push a small stiff wire through the hole so it can be found in
the attic. Drill a 1/2 inch hole through the ceiling wall plate.
4. Probe for obstructions in the partition. Then drill a 1/2 inch
hole through wall at the selected location for thermostat.
5. From the attic, feed the thermostat cable or a stiff wire through
wall until even with thermostat location.
6. Snag thermostat cable through hole and pull cable through
hole in wall so that 6 inches of cable protrudes.
7. Route cable to wall furnace.
MOUNTING THE THERMOSTAT
1. To remove thermostat cover, squeeze both sides and lift.
Carefully remove and discard the packing tab protecting the
switch contacts See. Fig 25.
2. Connect the thermostat wires to the terminal screws on the
thermostat base.
3. Push any excess wire back through hole in wall and plug hole
with insulation to prevent drafts from affecting thermostat
operation.
4. Being sure to level the thermostat for best appearance, fasten
the thermostat base to the wall through mounting holes with
screws provided.
5. Replace the thermostat cover.
20
FIGURE 24 Route Thermostat Cable
FIGURE 25 Thermostat
NOTE: Use heavier wire size if more than 20 ft. of wire is
required.
SQUEEZE FIRMLY
BOTH SIDES AND LIFT
TO REMOVE COVER