Installation - Lennox ComfortSense 7500 Installation And Setup Manual

This is a 24VAC low-voltage thermostat. Do not
install on voltages higher than 30VAC.
Do not short (jumper) across terminals on the
gas valve or at the system control to test instal­
lation. This will damage the thermostat and void
the warranty.
Always turn off power at the main power source
by switching the circuit breaker to the OFF posi­
tion before installing or removing this thermo­
stat.
All wiring must conform to local and national
building and electrical codes and ordinances.

Installation

Before beginning installation, note the type of
equipment, number
CAUTION
WARNING
of stages, and
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.
DO NOT
S Install on voltages higher than 30VAC.
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.
any
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