Lennox International Inc HPXa15 owner manual Lennox Dealers

HPXA15

W I T H R 4 1 0 A

R E F R I G E R A N T

Your system may be equipped with an electronic air cleaner which will provide respiratory relief by re- moving up to 90 percent of all airborne particles which pass through it. If it is, ask your dealer to instruct you on its maintenance.

Your indoor evaporator coil is equipped with a drain pan to collect condensate formed as your system re- moves humidity from the inside air. Have your dealer show you where the main condensate drain (and auxil- iary drain, if applicable) runs and how to check the drain for any obstruction.

It is also very important to provide unrestricted airflow to the

outdoor unit. Leaves, trash or shrubs

crowding the unit cause the

outdoor unit

to work harder and use more energy. Keep shrubbery trimmed away from the unit and periodically check for debris which may have collected around the unit.

Lennox Dealers

Nobody knows more about the care and operation of your new Lennox equipment than your Lennox dealer. Your Lennox dealer is your best choice for routine maintenance or service. Lennox’ Quality Dealer Standards program ensures that when you call your Lennox dealer, you can count on prompt, courteous and professional service.

Before the start of each heating and cooling season, the following service checks should be performed by a qualified service technician.

As always, electrical power to the unit must be turned off prior to any unit maintenance.

DThe outdoor and indoor coils should be inspected and cleaned. The outdoor coil may be flushed with a water hose.

NOTE – It may be necessary to flush the outdoor coil more frequently if it is exposed to substances which are corrosive or which block airflow across the coil (e.g., pet urine, cottonwood seeds, etc.)

DThe refrigerant lines should be visually inspected and the coils should be checked for leaks.

DWiring should be checked for loose connections.

DVoltage must be checked at the indoor and outdoor units (units operating).

DThe amp-draw at the outdoor fan motor and indoor blower motor should be checked. Values should be compared with those given on unit nameplate.

DIndoor unit filters should be cleaned or replaced.

DThe refrigerant charge should be checked and system pressures should be gauged.

DThe condensate drain line should be checked for free and unobstructed flow and it should be cleaned, if necessary.

Heat Pump Operation

Your new Lennox heat pump has several characteris- tics that you should be aware of:

Your heat pump satisfies heating demand by delivering large amounts of warm air into the living space. This is quite different from gas- or oil-fired furnaces or an electric furnace which deliver lower volumes of considerably hotter air

to heat the space.

Do not be alarmed if you notice frost on the outdoor coil in the winter months. Frost develops on the outdoor coil during the heating cycle when temperatures are below 45°F (7°C). An electronic control activates a defrost cycle lasting 5 to 15 minutes at preset intervals to clear the outdoor coil of the frost. During the defrost cycle, you may notice steam rising from the outdoor unit. This is a normal occurrence. The thermostat may engage auxiliary heat during the defrost cycle to satisfy a heating demand; however, the unit will return to normal operation at the conclusion of the defrost cycle.

Your Lennox HPXA15 heat pump is equipped with a compressor crankcase heater which protects the compressor from refrigerant slugging during cold weather operation. If power to your unit has been interrupted for several hours or more, set the room thermostat selector to the “Emergency Heat” setting to obtain temporary heat without the risk of serious equipment damage. In this operating mode, all heating demand will be satisfied by auxiliary heat. Compressor operation is locked out during Emergency Heat operation. After a six-hour compressor crankcase heater warm-up period, the thermostat can be switched to the “Heat” setting and normal operation will resume.