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manual abstract
This means that it will operate for longer periods of time than a single- speed heat pump even on moderate days. This longer operational time in low speed results in higher efficiency operation, lower operating noise, and better humidity control than a single-speed heat pump could achieve. The following are typical conditions that add extra heat and/or humidity to your home. Your unit will work longer to keep your home comfortable under these conditions: • Entrance doors are frequently opened and closed • Laundry appliances are being operated • A shower is running • More than the usual number of people are present in the home • More than the normal number of electric lights are in use • Drapes are open on the sunny side of the home HEATING CYCLE With the SYSTEM or MODE control of your indoor thermostat set to HEAT, the heating section of your home comfort system will operate until room temperature is raised to the level you have selected. Of course, the heating unit will have to operate for longer periods to maintain a comfortable environment on cooler days and nights than on moderate ones. Your 2-speed heat pump spends about 80% of its time operating in low-speed heating. This means that it will operate for longer periods of time than a single- speed heat pump even on moderate days. This longer operational time in low speed results in higher efficiency operation and lower operating noise than a single-speed heat pump could achieve. SUPPLEMENTAL HEAT Your heat pump is your primary heating source. Your system may also be 4 equipped with a supplemental heating source such as electric, gas, or oil. On cold days and nights, your system will automatically turn on the supplemental heat in order to maintain the level of comfort you have selected. Your Bryant electronic thermostat will display the words ENERGY SAVINGS when the heat pump is providing all the heat that is necessary. When additional heat is required, your thermostat will turn on the supplemental heat (if equipped) and will display the AUX HT message. DEFROST CYCLE When your heat pump is providing heat to your home and the outdoor temperature drops below 45°F, moisture may begin to freeze on the surface of the outdoor coil. If allowed to build up, this ice would impede airflow across the coil and reduce the amount of heat absorbed from the outside air. So, to maintain energy-efficient operation, your heat pump has an automatic defrost cycle. The defrost cycle starts at a preset time interval of 90 minutes, although, it may be reset to either 30 or 50 minutes by your dealer. Defrost will start at the preset time only if the ice is sufficient to interfere with normal heating operation. After the ice is melted from the outdoor coil, or after a maximum of 10 minutes in the defrost mode, the unit will automatically switch back to normal heating operation. Do not be alarmed if steam or fog appears at the outdoor unit during the defrost cycle. Water vapor from the melting ice may condense into a mist in the cold outside air. During certain weather conditions such as heavy snow and freezing rain it is not uncommon for ice to build up on the outdoor unit grille. This is normal for these weather conditions. Do not attempt to remove the ice from the outdoor unit grille. This condition will not affect the proper functioning of the unit and will clear within a few days. EMERGENCY HEAT The emergency heat (EHEAT) setting on your Bryant electronic thermostat can be used to turn off your heat pump and use only the supplemental heating source (if equipped). The Auxiliary Heat Indicator (AUX HT) will be displayed while your system is operating in EHEAT mode. Emergency heat is not normally used. There may be situations, however, where it is necessary. Your Bryant programmable electronic thermostat has a service alarm indicator. In the heating season, if the thermostat ever displays the TROUBLE message, switch your thermostat to EHEAT mode and call your dealer. This allows your supplemental heating source to keep your home warm until your heat pump can be serviced. Also, if the electricity to your heat pump has been off for more than 30 minutes, switch your thermostat to EHEAT mode before restarting your heat pump. Leave the system in EHEAT mode for an amount of time equal to the power outage. It is not necessary to exceed 12 hrs. If you cannot determine how long the power has been off, leave the system in EHEAT mode for 8 hrs. PERFORMING ROUTINE MAINTENANCE With the proper maintenance and care, your heat pump unit will operate economically and dependably. Maintenance can be accomplished easily by referring to the following directions. However, before performing maintenance, consider these important safety precautions. Fig. 4—Main Electrical Disconnect MAIN ON OFF CAUTION Although special care has been taken to minimize sharp edges in the construction of your unit, be extremely careful when handling parts or reaching into the unit. ! CHECK THE AIR FILTER A dirty air filter...
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