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 thermo- stat 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 tempera- ture 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 ther- mostat ever displays the TROUBLE mes- sage, 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.
Fig. 4—Main Electrical Disconnect
PERFORMING ROUTINE MAINTENANCE
With the proper maintenance and care, your heat pump unit will operate economically and dependably. Mainte- nance can be accomplished easily by refer- ring to the following directions. However, before performing maintenance, consider these important safety precautions.
!WARNING
Disconnect all electrical power to the indoor air handler or furnace before removing access panels to perform any maintenance. Disconnect power to both the indoor and outdoor units. NOTE: There may be more than 1 electrical disconnect switch. Electri- cal shock can cause personal injury or death.
5
!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 will cause excessive strain on the compressor and blower motor. This can cause the components to overheat and automatically shut down. In the extreme, the components will fail and need to be replaced. To avoid inefficient or failed operation of your unit, CHECK THE FILTER(S) EVERY 3 TO 4 WEEKS. Replace filter(s) when necessary, or clean the filter(s) if you have the reusable type.
Disposable filters should be replaced by similar, new filters of the same dimen- sions.
Reusable, permanent filters should be washed in a solution of cold water and mild detergent, then rinsed and thor- oughly dried. THE FILTER MUST BE COMPLETELY DRY BEFORE BEING REINSTALLED. To avoid prolonged shutdown of your unit while a filter is drying, you should have an extra filter on hand. This allows you to rotate between the two filters with minimal downtime for your comfort system. Extra filters may be purchased from your dealer.
There are no filters in the outdoor unit of a split system. If your indoor unit is a gas or oil furnace, refer to your furnace User’s Manual for filter location and pro- cedures for replacement or cleaning.
If your system includes an indoor fan coil unit, the filter may be located in the unit where it connects with the return-air duct or plenum. (See Fig. 5.) Remove the filter cover plate by sliding latches toward cen- ter of plate. Lift filter to clear lower flange. Filter is spring-loaded and will pop out.
Reinstall filter, being certain to secure fil- ter behind lower flange. When reinstalling cover plate, secure plate behind upper flange then slide tabs outward.
The indoor fan coil unit may be located in the attic. In this instance the filter may be located behind the return air grille.Access the filter by removing the return air grille.
INDOOR COIL
If the indoor coil has only been operated with a clean filter in place, it should require minimal cleaning.
If coil cleaning is required, call your dealer for service. It may be necessary to clean the coil with a detergent solu- tion and rinse it with water. This could
