2.Ice or frost tends to form on the coil during winter heating operation. Your heat pump is designed to automatically melt the ice. When in this defrost cycle, it is normal for steam or fog to rise from the outdoor unit, and for water to drain from the outside of unit. Do not be alarmed!
I.COOLING MODE
With the SYSTEM or MODE control set to COOL, your heat pump will run in cooling mode until the indoor temperature is lowered to the level you have selected. On extremely hot days, your heat pump will run for longer periods at a time and have shorter ªoffº periods than on moderate days.
II.HEATING MODE
With the SYSTEM or MODE control of your indoor thermostat set to HEAT, your heat pump will run in heating mode until room temperature is raised to the level you have selected. Of course, your heat pump will run for longer periods to maintain a comfortable environment on cooler days and nights than on moderate ones.
III.SUPPLEMENTAL HEAT
Your heat pump is your primary heating source. Your system may also be equipped with a supplemental heating source such as electric heat. On cold days and nights, your system will automati- cally turn on the supplemental heat in order to maintain the level of comfort you have selected.
When your heat pump needs additional heat to keep you comfort- able, your Bryant electronic thermostat will turn on the supple- mental heat (if equipped) and display the ªAUX HTº message.
IV. DEFROST MODE
When your heat pump is providing heat to your home or office and the outdoor temperature drops below 45°F, moisture may begin to freeze on the surface of the 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
The defrost mode starts at a preset time interval of 30 minutes, although, it may be reset to 60, 90 or 120 minutes. 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 coil, or after a maximum of 10 minutes in defrost mode, the unit automatically switches back to normal heating operation.
Do not be alarmed if steam or fog appears at the outdoor unit during defrost mode. 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 unit grille. This is normal for these weather conditions. Do not attempt to remove the ice from the unit grille. This condition will not affect the proper function of the unit and will clear within a few days.
V.EMERGENCY HEAT MODE
This allows your supplemental heating source to keep your home or office warm until your heat pump can be serviced.
MAINTENANCE AND SERVICE
This section discusses maintenance that should be performed by your dealer and care you, as the owner, may wish to handle for your new heat pump.
A.Routine Maintenance
All routine maintenance should be handled by skilled, experienced personnel. Your dealer can help you establish a standard proce- dure.
For your safety, keep the unit area clear and free of combustible materials, gasoline, and other flammable liquids and vapors.
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To assure proper functioning of the unit, flow of condenser air must not be obstructed from reaching the unit. Clearance from the top of the unit is 48 in. Clearance of at least 36 in. is required on sides except the power entry side (42 in. clearance) and the duct side (12 in. minimum clearance).
B. Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain yourself, please carefully consider the following:
WARNING: 1. TURN OFF ELECTRICAL POWER TO YOUR UNIT BEFORE SERVIC- ING OR PERFORMING MAINTE- NANCE. ELECTRIC SHOCK COULD CAUSE SERIOUS INJURY OR DEATH.
2.When removing access panels or performing mainte- nance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to keep sharp edges to a minimum, be extremely careful when handling parts or reaching into the unit.
AIR FILTERS
The air filter(s) should be checked at least every 3 or 4 weeks and changed or cleaned whenever it becomes dirty. Dirty filters produce excessive stress on the blower motor and can cause the motor to overheat and shut down.
This unit must have air filters in place before it can be operated. These filters can be located in one of at least two places. In many applications the installer will provide return air filter grilles mounted on the wall or ceiling of the conditioned structure. In the instance of filter grilles, the filters can simply be removed from the grille and replaced.
The other typical application is an accessory filter rack installed inside the unit itself. The following information is given to assist in changing filters used in these internal filter racks.
Table 1 indicates the correct filter size for your unit. Refer to Fig. 2 to access filters installed in the accessory filter rack.
TABLE 1ÐINDOOR-AIR FILTER DATA
UNIT SIZE | FILTER SIZE |
20x20x1 | |
604B036 | 20x24x1 |
24x30x1 | |
|
|
To replace or inspect filters in accessory filter rack (See Fig. 2):
1.Remove the filter access panel using a
2.Remove the filter(s) by pulling it out of the unit. If the filter(s) is dirty, clean or replace with a new one.
When installing the new filter(s), note the direction of the airflow arrows on the filter frame.
If you have difficulty locating your air filter(s) or have questions concerning proper filter maintenance, contact your dealer for instructions. When replacing filters, always use the same size and type of filter that was supplied, originally, by the installer.
CAUTION: Never operate your unit without the filter(s) in place. Failure to heed this warning may result in damage to the blower motor and/or compressor. An accumulation of dust and lint on internal parts of your unit can cause loss of efficiency and , in some cases, a fire.
FANS AND FAN MOTOR
Periodically, check the condition of fan wheels and housings and
