Thermostat Installation; Mounting Thermostat - 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
S Shut off all power to system before installing.
S Read this entire document, noting which
instructions pertain to your equipment and
system requirements.
S Make sure that all wiring conforms to local
and national building and electrical codes and
ordinances.
S 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).
S Ensure load from any thermostat connection
is less than 1 AMP.

THERMOSTAT INSTALLATION

of stages, and
DO NOT
S Install on voltages higher than 30VAC.
any
S Short (jumper) across terminals on the gas
valve or at the system control to test
installation. This will damage the thermostat
and void the warranty.
S Install on outside walls or in direct sunlight.
S 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.
6