Use and Care Manual
506318-03Page 10 of 11 Issue 1850
Homeowner’s Information
ELECTRICAL SHOCK HAZARD!
Turn OFF electric power to unit before performing any
maintenance or removing panels or doors.
FAILURE TO DO SO COULD RESULT IN BODILY
INJURY OR DEATH.
WARNING
Heat Pump Operation
Your new heat pump has several characteristics that you
should be aware of:
• Heat pumps satisfy heating demand by delivering large
amounts of warm air into the living space. This is quite
different from gas-or oil-red furnaces or an electric
furnace which deliver lower volumes of considerably
hotter air to heat the space.
• Do Not be alarmed if you notice frost on the outdoor
coil in the winter months. Frost develops on the outdoor
coil during the heating cycle when temperatures are
below 45°F. An electronic control activates a defrost
cycle lasting 5 to 15 minutes at preset intervals to clear
the outdoor coil of the frost.
• During the defrost cycle, you may notice steam rising
from the outdoor unit. This is a normal occurrence.
The thermostat may engage auxiliary heat during the
defrost cycle to satisfy a heating demand; however,
the unit will run to normal operation at the conclusion
of the defrost cycle.
In case of extended power outage...
If the outdoor temperature is below 50°F and power to your
outdoor unit has been interrupted for 6 hours or longer,
observe the following when restoring power to your heat
pump system.
• Set the room thermostat selector to the “Emergency
Heat” setting to obtain temporary heat for a minimum
of 6 hours. This will allow system refrigerant pressures
and temperatures enough time to return to a stabilized
condition.
• In Emergency Heat mode, all heating demand is
satised by auxiliary heat; heat pump operation is
locked out. After a 6 hour “warm-up” period, the
thermostat can then be switched to the “Heat” setting
and normal heat pump operation my resume.
• Heat pumps (in the cooling mode) remove humidity
from your home. Depending on the amount of moisture
in the air inside your home, water will trickle from the
condensate drain of the cooling coil.
Thermostat Operation
The wall-mounted thermostat controls your air conditioner.
The thermostat is available in various congurations from
different manufacturers. The information below is typical for
most thermostats. Ask your dealer for specic information
regarding the model of thermostat installed.
Temperature Setting Levers
Most heat pump thermostats have 2 temperature selector
levers: one for heating and one for cooling. Set the levers or
dials to the desired temperature set points for both heating
and cooling. Avoid frequent temperature adjustment;
turning the unit off and back on before pressures equalize
puts stress on the unit compressor.
On heat pump systems, increasing your thermostat setting
by more than 2 degrees may cause supplemental heaters
to turn on, reducing potential energy savings.
Fan Switch
In AUTO or INT (intermittent ) mode, the blower operates
only when the thermostat calls for heating or cooling. This
mode is generally preferred when humidity control is a
priority. The ON or CONT mode provides continuous indoor
blower operation, regardless of whether the compressor or
auxiliary heat are operating. This mode is required when
constant air circulation or ltering is desired.
System Switch
Set the system switch for heating, cooling or auto
operation. The auto mode allows the heat pump to
automatically switch from heating mode to cooling mode to
maintain predetermined comfort settings. Many heat pump
thermostats are also equipped with an emergency heat
mode which locks out heat pump operation and provides
temporary heat supplied by the auxiliary heat.
Indicating Light
Most heat pump thermostats have an amber light
which indicates when the heat pump is operating in the
emergency heat mode.
Temperature Indicator
The temperature indicator displays the actual room
temperature.
Fan Control
For fan control your thermostat may have a Fan Selection
Switch that allows you to run the fan continuously or cycle
it automatically with the heating or cooling system. Switch
the lever to ON for continuous operation and to AUTO for
automatic cycling.
For maximum comfort satisfaction and continual air
cleaning/ltering, constant fan operation is recommended.
On models without a fan Selection Switch, the fan will cycle
with the outdoor unit.