Heat Controller HRG14 Heat Pumps for R-410A Owner's Manual
OWNER’S INFORMATION MANUAL
FOR
HEAT PUMPS
IMPORTANT! BEFORE YOU
TURN YOUR HEAT PUMP
ON!
1. Be sure the electrical power has been turned on at the
outdoor unit for at least 8 hours. In cold weather 12
hours is better. This is to prevent damage to your com-
pressor.
2. Be sure all supply and return grilles are open and not
obstructed.
3. Check to see that your indoor unit has clean air filters
installed to prevent clogging the fins on the coil.
HOW YOUR HEAT PUMP WORKS
COOLING
During the cooling season, your Heat Pump works like any
other summer air conditioner. It uses an indoor coil, a com-
pressor and an outdoor coil to move heat from inside to
outside. Fans move air across the coils and circulate air in
the conditioned space. A thermostat turns the fans and
compressor on and off as cooling is needed. Hotter
weather means more cooling is required, so your unit will
run longer. When the temperature is highest, the unit may
run continuously for several hours.
HEATING
In the heating season, the use of the coils is reversed. The
outdoor coil picks up heat from the air and the indoor coil
releases this heat to warm your home. Colder weather in-
creases heat needed and the unit runs longer. In most
areas the temperature will sometimes drop low enough
that the Heat Pump will run continuously. This outdoor
temperature at which the heat needed is equal to your
Heat Pump’s capacity is known as the system “Balance
Point”. This temperature will vary with each installation,
depending on the heat loss of the home and the size of the
heat pump selected. Below the Balance Point, the Heat
Pump will run continuously and the auxiliary electric
resistance heat will be cycled on and off by the ther-
mostat, as needed. Your Heat Pump will continue to
operate efficiently at outdoor temperatures below 0°F.
Heat Pumps operate with much lower air temperatures
than gas furnaces and other types of heating equipment.
The air coming from supply grilles and registers will be on-
ly 15° to 30° warmer than the air in your home. It will feel
cool if it blows directly on you, but will provide the heat
needed to keep your home warm and comfortable.
DEFROST CYCLE
When the outdoor temperature drops below 45°, frost may
start to form on the outdoor coil. Frost buildup will be
heaviest on damp days with the temperature at 35° to 40°.
The Heat Pump has an automatic control which will
reverse the system and stop the outdoor fan to defrost the
coil when needed. Some units operate on a timer at 45 to
90 minute intervals. Others have an electronic control
which senses coil and air temperatures to determine when
a defrost cycle is needed. They may go as long as 6 hours
between defrosts. The coil may be almost completely
covered with frost at some times. Don’t worry unless it
continues to build up a thicker layer with areas of hard
clear ice. If excessive ice buildup should occur, call your
serviceman.
When the Heat Pump is defrosting, a cloud of steam may
rise from the outdoor unit for a short time. This is normal
and harmless.
The water which runs from the defrosting coil must be
drained away from the unit. Snow drifts must be kept cleared
away to prevent ice buildup in the coil from defrost water.
Important things to remember about the Defrost Cycle.
1. Water must drain away from the coil and unit to pre-
vent damage from ice buildup. Keep snow cleared
away.
2. The outdoor fan stops. The unit may make some
strange hissing or gurgling noises and a cloud of
steam. They are normal.
3. Call your serviceman if you notice excessive frost and
clear ice buildup.
92-20802-03-09
SUPERSEDES 92-20802-03-08
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