Filter
Top Products
4
or MODE control is set to OFF. With the SYSTEM or MODE
control set to COOL, your air conditioner will operate when the
indoor temperature rises above the level that you wish to main-
tain. With the SYSTEM or MODE control set to HEAT, the heat-
ing unit of your home comfort system will operate automatically
when 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 equipment
operation. With the SYSTEM or MODE control set to AUTO,
your air conditioner 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 PROGRAMMABLE or NON-PRO-
GRAMMABLE. A NON-PROGRAMMABLE thermostat
does not allow the temperature settings to be varied throughout
the day or week without physically changing the settings. A
PROGRAMMABLE thermostat allows various daily tempera-
ture 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 pro-
gramming can result in energy savings on your home’s heating
and cooling.
COOLING MODE
When operating in cooling mode, your air conditioner runs until the
indoor temperature is lowered to the level you have selected. On
extremely hot days, your 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 MODE
With the SYSTEM or MODE control of your indoor thermostat
set to HEAT, the heating unit of your home comfort system oper-
ates until room temperature is raised to the level you have select-
ed. 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 heating unit User’s Manual for specific informa-
tion on heating operation.
PERFORMING ROUTINE
MAINTENANCE
With the proper maintenance and care, your air conditioning 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:
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 worst case, these compo-
nents will fail and need to be replaced. To avoid inefficient or
WARNING
To prevent personal injury or death disconnect
all electrical power to the indoor air handler or
furnace before removing access panels or per-
forming any maintenance. Disconnect power to
both the indoor and outdoor units. NOTE: There
may be more than 1 electrical 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.
!
!
Fig. 4—Main Electrical Disconnect
Fig. 5—Removing Filter from Fan Coil Unit