2 Remove old unit
IMPORTANT : LABEL ALL WIRES
BEFORE DISCONNECTING THEM!
Switch electricity to the furnace and
air conditioner OFF;
then proceed with the following steps.
Remove cover from old thermostat. Most are snap-on types
and simply pull off. Some have locking screws on the side
or front. These must be loosened. Note the letters printed
near the terminals. Attach labels (enclosed) to each wire for
identification.
Label the wires one at a time. You must have all the wires labeled
before you proceed. With all wires labeled, remove them from the old unit.
Make sure the wires do not fall back inside the wall.
Wind them around a
pencil to keep them from falling.
Loosen all screws on the old thermostat and remove it from the wall.
Fill wall opening with non-combustible insulation to prevent drafts.
PG 3
B
G
W
Caution
Read instructions carefully before removing any wiring from existing thermostat.
Wires must be labeled before they are removed. THERE IS NO STANDARD
COLOR CODE. When removing wires from their terminals, ignore the color of the
wires since these may not match the letter.
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