Installing Thermostat; Thermostat Installation - Lennox ComfortSense 7500 Installation And Setup Manual

Before beginning installation, note the type of
equipment, number
accessories being installed. This thermostat is a
24VAC low-voltage thermostat and requires a
common wire to the thermostat to operate.
DO
1. Shut off all power to system before installing.
2. Read this entire document, noting which
instructions pertain to your equipment and
system requirements.
3. Make sure that all wiring conforms to local
and national building and electrical codes and
ordinances.
4. Use thermostat wire between the thermostat
and the optional outdoor temperature sensor
(may be separate wire pair or two wires of a
multi-wire cable).
5. Ensure load from any thermostat connection
is less than 1 AMP.
DO NOT
1. Install On voltages higher than 30VAC.

THERMOSTAT INSTALLATION

of stages, and
2. Short (jumper) across terminals on the gas
any valve or at the system control to test
installation. This will damage the thermostat
and void the warranty.
3. Install on outside walls or in direct sunlight.
4. Exceed thermostat wire run length greater
than 300 feet (91m).

INSTALLING THERMOSTAT

1. Unpacked the thermostat and open the case
with a thin-blade screwdriver. Place between
wall base and unit and twist to separate unit
from base.
2. Select a location for the thermostat about 5
feet (1.5m) above the floor in an area with
good air circulation at average temperature.
3. Do not install the thermostat where it can be
affected by:
S
Drafts or dead spots behind doors
and in corners.
S
Not close to entrance or automatic
doors.
5