Lennox International Inc HPXa15 owner manual Before you call, P504551M

THERMOSTAT OPERATION -- COMFORT IS AT YOUR FINGERTIPS

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

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.

Before you call

If your system fails to operate, check the following before calling for service:

DCheck to see that all electrical disconnect switches are ON.

DMake sure the room thermostat temperature selector is properly set.

DMake sure the room thermostat system switch is properly set.

DReplace any blown fuses, or reset circuit breakers.

DMake sure unit access panels are in place.

DMake sure air filter is clean.

DLocate unit model number and have it handy

before calling.

Please record the following information for your convenience.

Dealer Name:

Address:

Phone Number:

Unit Model Number: HPXA15 –

Installation Date:

Visit us at www.lennox.com, or contact us at 1-800-9-LENNOX.

*P504551M*

2002 Lennox Industries Inc., Dallas, TX Litho U.S.A. 504,551M 02/2002