Unit Part (Catalog) & Serial Numbers; Memory Protection - Lennox ComfortSense 7500 Installation And Setup Manual

Set point range: 45 to 60% Relative Humidity
(RH). Factory default - 50%.
Relative Humidity controls to within 2% on either
side of RH set point.
When the "D" terminal is activated with 24VAC,
dehumidification is inactive.
NORMAL, MAX and HUMIDITROL modes are
disabled by default from the factory.
As a precaution, regardless of how low the heating
set point has
dehumidification is inhibited below 65ºF indoor
temperature.
Unit Part (Catalog) & Serial Numbers
A label on the back of the thermostat is visible
through an opening in the back of base plate. This
identifies the Lennox Catalog Number, Part
Number and Serial Number. Separate the base
plate from the thermostat to see additional
manufacturing information.
been set, Humiditrol

Memory Protection

The thermostat stores all the information
concerning its programming (state, mode,
program information, last temperature measured)
in a nonvolatile memory.
This function avoids the loss of the state of the
thermostat when a power-down occurs. The only
thing that might be lost is the clock and date
®
information, however, a super capacitor will
remember clock / date information for as long as it
has a charge (approximately 24 hours). When
power down occurs (due to a power outage) the
thermostat is able to shut off heat relays (Y1, Y2,
W1, W2) when in heating mode and W1 and W2
when in cooling mode. The O and B relay will
maintain their last state. When power is restored
the thermostat will be in heat /cool mode so either
mode can run to re-satisfy the temperature setting
in the home. Day and time (schedules) may be off
due to battery loss.
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