• Thermostat"jiggling"causesrapid-cycling,whichispotentially
damagingtothecompressor.Donotmovethetemperature
selectoronthethermostatforanyreasonforatleast5 minutes
after the compressor has shut off.
• You may find that you can maintain greater personal comfort by
running the fan continuously. "Air pockets" can form due to the
structure of the building, placement of registers, etcetera. These
air pockets may be too cool or warm for your liking. Continuous
fan operation minimizes any temperature differences. Also,
systems equipped with electronic air cleaners and/or humidifiers
offer the added benefits of having the air continuously cleaned
year-round, and humidified during the winter season.
• Your heat pump will remove humidity from your home during
the cooling season. After a few minutes of operation, you should
be able to see water trickle from the condensate drain. Check this
occasionally to be sure the drain system is not clogged. Of
course, don't expect to see much drainage if you live in a very
dry climate.
OPERATING YOUR HEAT PUMP
The operation of your heat pump 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 for heat pump systems include temperature control
selector, FAN switch, and SYSTEM switch.
The temperature control selector is a dial or button(s) 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 to set the heating
operation temperature. Typical settings are 78°F (25.6°C) for
cooling and 68°F (20°C) for heating.
The FAN switch offers two options for controlling the blower:
AUTO and ON. When set to AUTO, the blower will run during the
time the heat pump is operating. When the FAN switch is set at the
ON position, the blower will run continuously.
Typically, the SYSTEM switch on your thermostat offers the
following selections: COOL, OFF, and HEAT. Your thermostat
may also have another selection, AUTO. The heat pump will not
operate when the SYSTEM switch is set at the OFF position. With
the SYSTEM switch set at COOL, your heat pump will operate in
its cooling mode when the indoor temperature rises above the level
that you wish to maintain. With the SYSTEM switch set at the
HEAT position, your heat pump will provide warmth whenever 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 switch set in the AUTO position, the cooling mode
is activated when the indoor temperature rises above the thermostat
cooling temperature setting, or the heating mode will be activated
when the indoor temperature drops below the thermostat setting for
the heating cycle.
See your thermostat owner's manual for additional information.
Cooling Cycle
When operating in the cooling cycle, your heat pump will run until
the indoor temperature is lowered to the level you have selected.
On extremely hot days, your heat pump 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. Your heat pump will work longer to keep
your home comfortable under these conditions:
• 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 Cycle
With the SYSTEM switch of your indoor thermostat set to the
HEAT position, the heat pump will operate in its heating mode
until room temperature 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 colder days and nights
than on moderate ones.
• Do not operate your unit in the heating mode when outdoor
temperatures are above 66°F 19°C).
Defrost Cycle
When your heat pump is providing heat to your home and the
outdoor temperature drops below 45°F, moisture may begin to
freeze on the surface of the outdoor coil. If allowed to build up, this
ice would impede airflow across the coil and reduce the amount of
heat absorbed from the outside air. So, to maintain energy-efficient
operation, your heat pump has an automatic defrost cycle.
The defrost cycle starts at ta preset time interval of 60 minutes.
Defrost will start at the preset time only if the ice is sufficient to
interfere with normal heating operation.
After the ice is melted from the outdoor coil, or after a maximum
of 10 minutes in the Defrost mode, the unit will automatically
switch back to normal heating operation.
Do not be alarmed if steam or fog appears at the outdoor unit
during the defrost cycle. Water vapor from the melting ice may
condense into a mist in the cold outside air.
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