Lennox ComfortSense 7500 Installation And Setup Manual page 4

Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed by a
licensed professional HVAC installer (or equiv­
alent) or service agency.
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.
WARNING
CAUTION
In all applications, the ComfortSense
7500 thermostat can only be used with all resi­
dential units and approved commercial split‐
system matches, and those which meet the fol­
lowing installation criteria:
S installation uses 18 GAUGE thermostat
wire or larger,
S thermostat wire run length DOES NOT
EXCEED 300' (91m),
S load from any thermostat connection is 1
AMP or LESS.
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.
4
IMPORTANT
®
CAUTION
Model