CA8900 Z-Wave® Thermostat Installation Guide
Part Two: Installing Guide
WARNING–Risk of Fire or Electric Shock
• To avoid ﬁre, shock, or death, and to prevent damage to the furnace,
air conditioner, and thermostat, disconnect the power supply before
beginning work. This can be done at the circuit breaker, or at the
• Do not short (jumper) across electric terminals at control on
furnace or air conditioner to test the system. This will damage the
thermostat and void your warranty.
• All wiring must conform to local codes and ordinances.
• Your thermostat is a precise instrument, handle it with care.
• Do not turn electricity back on until work is completed.
• This thermostat is designed for use with 24 volt AC systems. The
thermostat should be limited to a maximum of 1.0 amps; higher
amperage may cause damage to the thermostat.
• #1 Phillips screwdriver (small)
• Drill with 3/16-in. (4.8mm) bit
television, radiator register, or ﬁreplace; near hot
water pipes in a wall; near a stove on the other side
of a wall.
1 – Location of Thermostat
Replacement installations—mount the new thermostat
in place of the old one.
• 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.
New installations—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
• Do not locate in a damp area. This can lead to corro-
sion that will shorten thermostat life.
• Do not install it
where there are
as: in direct
• Do not locate where air circulation is poor, such as:
in a corner or an alcove; or behind an open door.
• Do not install the unit until all construction work
and painting has been completed.
• This thermostat does not require leveling.
a lamp, radio,
2. Attach labels (enclosed) to each wire for identiﬁca-
2 – Label Wires from Old Unit
IMPORTANT : LABEL ALL
WIRES BEFORE DISCONNECT-
NOTE: Read instructions carefully before remov-
ing 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 since these may not comply with any
Switch electricity to the furnace
and air conditioner OFF; then
proceed with the following steps.
1. 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 loos-
ened. Note the letters printed near the terminals.
NOTE: Make sure the wires do not fall back in-
side the wall. You can wind them around a pencil
to keep them from falling.
3 – Remove Old Unit
1. Label the wires one at a time. You must label all the
wires before you proceed.
3. Loosen all screws on the old thermostat and re-
move it from the wall.
2. With all wires labeled, remove them from the old
4. Fill wall opening with non-combustible insulation
to prevent drafts.
Providing a brighter solution.™