Unit Part (Catalog) & Serial Numbers; Memory Protection - Lennox ComfortSense 5500 Installation And Setup Manual

cessed through the installer settings menu). Test in­
clude cooling, heating and fan outputs.
Select system test mode. A pop-up will be displayed
indicating all equipment will be stopped. Touch con­
firm to continue.
Touching the OFF button next to the desired option
will change the status to ON and will enable the relay
for that terminal. Touching again will turn OFF the re­
lay. Touch the left arrow (<) to exit the system test
mode.
system test mode
Y1
W1
G
All HVAC components can be tested to confirm the
signals between thermostat and unit are being sent
and were received.
NOTES: After 5 minutes without a test being initiat­
ed, the test modes is disabled and system goes
back to the normal mode (i.e. HOME screen).
When in SYSTEM TEST MODE, the compressor
minimum off timer is bypassed.
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 infor­
mation.

Memory Protection

The thermostat stores all the information concerning
its programming (state, mode, program information,
off
last temperature measured) in a nonvolatile memo­
ry.
off
This function avoids the loss of the state of the ther­
mostat when a power-down occurs. The only thing
that might be lost is the clock and date information,
off
however, a lithium battery will remember clock / date
information for as long as it has a charge (approxi­
mately 24 hours). When power down occurs (due to
a power outage) the thermostat is able to switch off
all relays. 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 pow­
er loss.
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