Cooling Cycle, Heating Cycle | Bryant CENTRAL AIR CONDITIONER

MAIN

OFF

Fig. 4—Main Electrical

Disconnect

temperature. Typical settings are 78°F for cooling and 68°F for heating.

The FAN control offers 2 options for con- trolling the blower: AUTO and ON. When set to AUTO, the blower will run only while the thermostat operates the cooling or heating section. When the FAN control is set to ON, the blower will run continu- ously—regardless of whether the cooling or heating section is operating.

Typically, the SYSTEM or MODE control on your thermostat offers the following selections: COOL, OFF, and HEAT. Your thermostat may also have a fourth selec- tion, AUTO. Neither the cooling or heat- ing section will operate when the SYSTEM or MODE control is set to OFF. With the SYSTEM or MODE control set to COOL, the cooling section of your comfort system will operate when the indoor temperature rises above the level that you wish to maintain. With the SYS- TEM or MODE control set to HEAT, the heating section will operate automatically when the indoor temperature falls below the level that you have selected.

The AUTO selection found on some thermostats provides for automatic changeover between cooling and heating cycles. With the SYSTEM or MODE control set to AUTO, the cooling section will operate when the indoor temperature rises above the thermostat cooling temperature setting, or the heating section will operate when the indoor temperature drops below the thermostat setting for the heating cycle.

Your thermostat may be PROGRAM- MABLE or NON-PROGRAMMABLE. A NON-PROGRAMMABLE thermo- stat does not allow the temperature set- tings to be varied throughout the day or week without physically changing the settings. A PROGRAMMABLE thermo- stat allows various daily temperature changes to be preset. During the winter, for example, you may wish to “set back” the temperature of your home at night,

then have the temperature return to normal prior to waking up. The home’s temperature can then be lowered again during the day when no one is at home, but again be at peak comfort level when your family returns home. During the summer, the opposite changes might be programmed. When properly used, the programming can result in energy sav- ings on your home’s heating and cooling.

COOLING CYCLE

When operating in the cooling cycle, your air conditioner will run until the indoor temperature is lowered to the level you have selected. On extremely hot days, your air conditioner will run for longer periods at a time and have shorter “off” periods than on moderate days.

The following are typical conditions that add extra heat and/or humidity to your home and force your cooling unit to work longer to keep your home comfortable:

•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 tempera- ture 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.

Refer to your furnace User’s Manual for speciﬁc information on heating operation.

PERFORMING ROUTINE MAINTENANCE

With the proper maintenance and care, your air conditioning unit will operate economically and dependably. Mainte- nance can be accomplished easily by referring to the following directions. However, before performing mainte- nance, consider these important safety precautions:

•DISCONNECT ALL ELECTRICAL POWER TO THE AIR CONDITIONER BEFORE REMOVING ACCESS PAN- ELS OR PERFORMING ANY MAIN-

TENANCE. Disconnect power to both the indoor and outdoor units. NOTE: THERE MAY BE MORE THAN 1 ELECTRI- CAL DISCONNECT SWITCH.

•ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF YOUR UNIT, BE EXTREMELY CARE- FUL 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 case, 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 dimensions.

Reusable, permanent ﬁlters should be washed in a solution of cold water and mild detergent, then rinsed and thoroughly dried. THE FILTER MUST BE COMPLETELY DRY BEFORE BEING REINSTALLED. To avoid pro- longed shutdown of your unit while a ﬁlter is drying, you should have an extra ﬁlter on hand. This would allow you to rotate between the 2 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 procedures 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

Bryant CENTRAL AIR CONDITIONER manual Cooling Cycle, Heating Cycle, Check the AIR Filter