PG
2
REMOVE OLD UNIT
Switch OFF electricity to the HEATING and COOLING systems
.
Then follow these 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. DO NOT remove wires. Note the letters printed near the
terminals. Attach labels (enclosed) to each wire for identification.
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 remov-
ing wires from their terminals, ignore the color of the wires and
LABEL THEM by the lettered terminal where they were screwed.
• Label the wires one at a time. You must label all the wires before
you proceed.
• With all wires labeled, remove them from the old unit.
• Make sure the wires do not fall back inside the wall. You can wind
them around a pencil to keep them from falling.
• Loosen all screws on the old thermostat and remove it from the
wall.
TOOLS
You will need a small Phillips screwdriver and a drill with 3/16-in. (4.8mm) bit for wall mounts.
LOCATION
Replacement installations - mount the CT110 in place of the old thermostat.
A new location will require moving your wiring.
For new installations and relocating the CT110 - follow the guidelines listed below:
• Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, and in a room that
is used often.
• Do not install it where there are unusual heating conditions, such as: in direct sunlight; near
a lamp, radio, television, radiator register, fireplace; near hot water pipes in a wall; or near a
stove on the other side of a wall.
• Do not locate in unusual cooling conditions, such as: on a wall
separating an unheated room; or in a draft from a stairwell, door,
or window.
• Do not locate in a damp area. This can lead to corrosion that will
shorten thermostat life.
• Do not locate where air circulation is poor, such as: in a corner, an
alcove; behind an open door.
• Do not install the CT110 until all construction and painting has
been completed.
• This thermostat does not require leveling.
Good
5ft.
(1.5m)
