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Please record the following information for your
convenience.
Dealer Name:
Address:
Phone Number:
Unit Model Number: HPXA12 –
Installation Date:
Before you call
If your system fails to operate, check the following
before calling for service:
D Check to see that all electrical disconnect
switches are ON.
D Make sure the room thermostat temperature
selector is properly set.
D Make sure the room thermostat system switch is
properly set.
D Replace any blown fuses, or reset circuit
breakers.
D Make sure unit access panels are in place.
D Make sure air filter is clean.
D Locate unit model number and have it handy
before calling.
504,409M 02/20022002 Lennox Industries Inc., Dallas, TX Litho U.S.A.
*P504409M*
THERMOSTAT OPERATION -- COMFORT IS AT YOUR FINGERTIPS
automatically switch from heating mode to cooling
mode to maintain predetermined comfort settings.
Many heat pump thermostats are also equipped with an
emergency heat mode which locks out heat pump op-
eration and provides temporary heat supplied by the
auxiliary heat.
Indicating Light
Most heat pump thermostats have an amber light which
indicates when the heat pump is operating in the
emergency heat mode.
Temperature Indicator
The temperature indicator displays the actual room
temperature.
Programmable Thermostats
Your Lennox system may be controlled by a
programmable thermostat. These thermostats provide
the added feature of programmable time-of-day
setpoints for both heating and cooling. Refer to the
user’s information manual provided with your
particular thermostat for operation details.
Though your thermostat may vary somewhat from the
description below, its operation will be similar.
Temperature Setting Levers
Most heat pump thermostats have two temperature se-
lector levers: one for heating and one for cooling. Set
the levers or dials to the desired temperature setpoints
for both heating and cooling. Avoid frequent tempera-
ture adjustment; turning the unit off and back on before
pressures equalize puts stress on the unit compressor.
Fan Switch
In AUTO or INT (intermittent) mode, the blower
operates only when the thermostat calls for heating or
cooling. This mode is generally preferred when
humidity control is a priority. The ON or CONT mode
provides continuous indoor blower operation,
regardless of whether the compressor or auxiliary heat
are operating. This mode is required when constant air
circulation or filtering is desired.
System Switch
Set the system switch for heating, cooling or auto
operation. The auto mode allows the heat pump to
Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.