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MAIN
ON
Fig.4--Main ElectricalDisconnect
or MODE control is set to OFE With the SYSTEM or MODE
control set to COOL, your air conditioner will operate when the
indoor telnperamre 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 colnfort system will operate autolnatically
when indoor telnperamre Pallsbelow the level that you have
selected.
The AUTO selection tBund on some therlnostats provides for
autolnatic changeover between cooling and heating equiplnent
operation. With the SYSTEM or MODE control set to AUTO,
your air conditioner will operate when the indoor telnperature
rises above the therlnostat cooling telnperature setting, or the
heating section will operate when the indoor telnperamre drops
below the therlnostat setting for the heating cycle.
Your thermostat may be PROGRAMMABLE or NON-PRO-
GRAMMABLE. A NON-PROGRAMMABLE therlnostat
does not allow the telnperature settings to be varied throughout
the day or week without physically changing the settings. A
PROGRAMMABLE therlnostat allows various daily tempera-
ture changes to be preset. During the winter, for example, you
lnay wish m set back the telnperature of your home atnight, then
have the telnperature return to normal prior to waiting up. The
holne's telnperature can then be lowered again during the day
when no one is at home, but again be at peak COlnfort level when
your falnily returns holne. During the smraner, the opposite
changes might be progralraned. When properly used, the pro-
gralraning can result in energy savings on your home's heating
and cooling.
COOLING MODE
When operating incooling lnode, your airconditioner rtms _mtiltl_e
in&_w telnperature is lowered to the level you have selected. On
extremely hot days, your conditioner will run for longer periods at
a tilne and have shorter offperiods than on lnoderate 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 holne COlnfortable:
• Entrance doors are ti_equentlyopened and closed.
• Laundry appliances are being operated.
• A shower is rulming.
• More than the ustml number of people are presem in the holne.
• More than the norlnal number of electric lights are in use.
• Drapes are open on the sulmy side of the holne.
HEATING MODE
With the SYSTEM or MODE control of your indoor therlnostat
set to HEAT, the heating unit of your holne comfort system oper-
ates until rooln temperature is raised to the level you have select-
ed. Of course, the heating unit will have to operate for longer
periods to lnaintain a COlnfortable environment on cooler days
and nights than on moderate ones.
Refer to your heating unit User's Manual for specific inforlna-
tion on heating operation.
PERFORMING ROUTINE
MAINTENANCE
With the proper lnaintenance and care, your air conditioning unit
will operate economically and dependably. Maintenance can be
accolnplished easily by referring to the following directions.
However, before perforlning lnaintenance, consider these
ilnportant safety precautions:
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.
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.
CHECKTHE AIR FILTER
A dirty air filter will cause excessive strain on the compressor
and blower lnotor. This can cause the COlnponents to overheat
and autolnatically shut down. In the worst case, these COlnpo-
nents will fail and need to be replaced. To avoid inefficient or
\
Fig. 5--Removing Filter from Fan Coil Unit
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