3
The thermostat should NOT be mounted:
•
close to a window, on an outside wall, or next to a door
leading to the outside.
•
where it will be exposed to direct light and heat from a
lamp, sun, fireplace, or other temperature-radiating
object which may cause a false reading.
•
close to or in direct airflow from supply registers and
return-air grilles.
•
in areas with poor air circulation, such as behind a door
or in an alcove.
WIRING CONSIDERATIONS
All wiring in the ComfortChoice system may be unshielded.
Ordinary thermostat wire is ideal for all connections. Use 22
gauge or larger for normal wiring. Lengths over 100 ft
should use 20 gauge or larger wire.
The thermostat requires 2 conductors.
The connection to equipment (furnace or fan coil) could
require as many as 8 conductors for a multi-stage installa-
tion. The optional outdoor air temperature (OAT) sensor
requires 2 conductors. The OAT sensor may be able to be
connected at the outdoor unit using existing wiring.
Cables with excess conductors are acceptable. Cut off or
fold back and tape any unneeded conductors.
Plan the routing of wiring early to avoid possible problems
later on.
Remember all wires converge at the Utility I/O board, so its
location is important.
Step 3 — Install Components
INSTALL UTILITY I/O BOARD
The Utility I/O board is designed so that wires can enter it
from behind, above, or below. Plan wire routing before
mounting Utility I/O Board.
1. Remove cover to access mounting holes (remove the
system cover from the left side first).
2. Mount back plate to wall using screws and wall anchors
provided.
3. Level back plate and tighten screws.
4. Connect included antenna by screwing the threaded end
to the Utility I/O board radio.
INSTALL THERMOSTAT
1. Turn off all power to equipment.
2. If an existing thermostat is being replaced:
a. Remove existing control from wall.
b. Disconnect wires from existing thermostat, one at a
time.
c. As each wire is disconnected, record wire color and
terminal marking.
!
CAUTION
EQUIPMENT DAMAGE AND SAFETY HAZARD
Failure to follow this caution WILL damage equipment.
Ensure that the system power is off. Disconnect
existing thermostat wires from existing thermostat and
equipment prior to connecting existing thermostat wires
to the ComfortChoice thermostat.
Fig. 1 - Locking Tab Location
