Fig. 4—Main Electrical Disconnect
than 55°F without modification. If oper- ation below this temperature is required, consult your installer.
OPERATING YOUR AIR CONDITIONER
The operation of your air conditioning system is controlled by the indoor thermostat. You simply adjust the thermostat and it maintains the indoor temperature at the level you select. Most thermostats have three controls; a tem- perature control selector, a FAN control, and a SYSTEM or MODE control. Thermostats may vary from those shown in Fig. 2 and 3.
The temperature control selector can be a button, lever, or set of buttons that allows you to establish the degree of temperature that you wish to maintain for your personal comfort. Some thermostats possess two temperature control selectors; one for setting the temperature desired during the cooling cycle, and one for setting the heating operation temperature.
The FAN control offers two options for controlling 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 continuously—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.
NOTE: For 2-speed air conditioners, this special feature is built in to protect the unit.
•1-MINUTE TIME DELAY – When changing speeds from low to high, or high to low, there is a 1-minute time delay. During the speed change delay, the outdoor fan will continue to run.
If you wish to program your accessory electronic indoor thermostat, refer to thermostat Installation Instructions.
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.
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•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.
NOTES: a) Two-speed air conditioners operate for long periods of time on low speed. This operation improves system efficiency and your comfort through clos- er control of temperature and humidity. Expect longer operating cycles.
b)With two-speed air conditioners, low and high indoor airflow settings are critical for maintaining system comfort and effi- ciency. Consult your installer for airflow setting adjustments.
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:
!WARNING
To prevent personal injury or death disconnect all electrical power to the air conditioner be- fore removing access panels or performing any maintenance. Disconnect power to both the indoor and outdoor units. Note: There may be more than 1 elec- trical disconnect switch.
!CAUTION
Although special care has been taken to minimize sharp edges in the construction of your unit, be extremely careful when handling parts or reach- ing into the unit.
