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Warranties Your unit is covered by one of the best warranties in the industry. The compressor in your new HSXA12 air conditioner is designed for use with R410A refrigerant and is backed by a 10–year limited warranty. All remaining components are covered by a 5–year limited parts warranty. That’s one more reason to trust Lennox. Your Elite Series air conditioner includes a sheet which outlines the warranty and its conditions. Keep your warranty along with other important records concerning the purchase and maintenance of your heating and cooling equipment. You should be aware that failure to maintain your system as outlined in this manual will void your equipment warranty. Maintenance In order to ensure peak performance, your system must be properly maintained. Clogged filters and blocked airflow prevent your unit from operating at its most efficient level. Ask your Lennox dealer to show you where your indoor unit’s filter is located. It will be either at the indoor unit (installed internal or external to the cabinet) or behind a return air grille in the wall or ceiling. Check the filter monthly and clean or replace it as needed. Disposable filters should be replaced with a filter of the same type and size. If you are unsure about the filter you need for your system, call your Lennox dealer for assistance. Important! Turn off electrical power to the unit at the disconnect switch before performing any maintenance. The unit may have multiple power supplies. Many indoor units are equipped with re-usable foam filters. These filters can be cleaned with a mild soap and water solution. Rinse the filter thoroughly and let it dry completely, before it is returned to the unit or grille. The filter and all access panels must be in place any time the unit is in operation. Your system may be equipped with an electronic air cleaner which will provide respiratory relief by removing 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 removes humidity from the inside air. Have your dealer show you where the main condensate drain (and auxiliary 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. . The 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.) . The refrigerant lines should be visually inspected and the coils should be checked for leaks. . Wiring should be checked for loose connections. . Voltage must be checked at the indoor and outdoor units (units operating). . The amp-draw at the outdoor fan motor and indoor blower motor should be checked. Values should be compared with those given on unit nameplate. . Indoor unit filters should be cleaned or replaced. . The refrigerant charge should be checked and system pressures should be gauged. . The condensate drain line should be checked for free and unobstructed flow and it should be cleaned, if necessary. ! "# $ ! %$ "& ! ! "# $ ! %$ "& ! Though your thermostat may vary somewhat from the description below, its operation will be similar. Temperature Setting Levers Set the lever or dial to the desired temperature setpoints for both heating and cooling. Avoid frequent temperature 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 furnace is operating. This mode is required when constant air circulation or filtering is desired. System Switch Set the system switch for heating, cooling or auto o...