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T822 THERMOSTAT
MERCURY NOTICE
If this thermostat is replacing a control that
contains mercury in a sealed tube, do not place
the old thermostat in the trash. Contact your local
waste management authority for instructions
regarding recycling and proper disposal of this
control or of an old control containing mercury in
a sealed tube.
STEP 3. CONNECT WIRES TO NEW
THERMOSTAT
IMPORTANT
All wiring must comply with local building codes
and ordinances. If you are unsure about house-
hold wiring procedures, please call your local
heating/cooling contractor.
1. Remove the cover on the new thermostat. To
remove the cover, insert your thumb into the inden-
tation on the side and pull the cover away from the
thermostat (see Fig. 3).
2. Loosen the R and W terminal screws on the back
of the new thermostat (see Fig. 4).
3. Remove the two wires from the pencil and attach
one wire to the R terminal and the other wire to the
W terminal (see Fig. 4 and 5).
4. Plug the hole in the wall with insulation to prevent a
warm or cool draft from affecting the operation of
the thermostat.
COVER
Fig. 3. Remove cover on new thermostat.
69-1711
BACK OF
THERMOSTAT
M19979
R
Fig. 4. R and W terminals on new thermostat.
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM)
Fig. 5. Wraparound and straight wiring connections.
STEP 4. MOUNT NEW
THERMOSTAT TO WALL
1. Position the thermostat on the wall. Place a level
on top of the thermostat and use a pencil to mark
the two mounting holes on the wall (see Fig. 6).
2. Move the thermostat to the side and drill the
mounting holes in the wall using a 1/16 in. drill bit
at the locations you marked.
3. Position the thermostat over the drilled holes and
loosely insert the mounting screws into the drilled
holes. Check the leveling of the thermostat and
tighten the mounting screws. Do not over tighten.
4. Remove styrofoam packing material that holds the
mercury switch in place during shipping.
2
W
M19980
FOR STRAIGHT
INSERTION
STRIP
5/16 IN. (8 MM)
M19648
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