Fedders ch1018bbd 用户指南

The heat pump system is a highly efficient way to heat and cool your
home. During the summer months, the system transfers heat and
humidity from your home to the outside. During the winter months,
the heat pump will transfer heat from the outside to inside your
home without drying the inside air.

Please take the time to read the operation instructions below to
familiarize yourself with your new heat pump system.

The heating and cooling functions are controlled by a wall
thermostat. The type of thermostat will vary depending on customer
preference, but generally most heat pump thermostats will be 
one-stage cool, two-stage heat type. The following instructions will
help you understand the operation of the thermostat and how to use
it for maximum efficiency.

The thermostat has a fan switch for

continuous or intermittent operation. This is identified as fan ON and
AUTOMATIC. In the AUTOMATIC position the indoor fan will run
only when the compressor is running whether in heating or cooling
mode. When the compressor turns off, the indoor fan will also turn
off. In the ON position, the fan will run constantly. This position will
keep the temperature throughout the home more even and will
generally improve indoor air quality by continuously drawing the air
through the air filter, especially if the filter is of the high-efficiency
type. If this position proves drafty in the winter months, your
contractor can, in most cases, wire the indoor fan to operate
continuously on a lower fan speed, and the correct higher fan speed
when the compressor is running. This arrangement will also be more
economical to operate than the continuous high speed operation.

Turn the thermostat heat/cool switch to the cool position. Set the
desired temperature on your thermostat dial. Do not operate the
cooling unit for extended periods at indoor temperatures over 85°F.
The unit indoor design temperature range is between 70°F and 80°F
in the cooling mode.

Turn the thermostat heat/cool switch to the heat position. Set the
desired temperature on your thermostat dial. Do not operate the
heating unit at indoor temperatures over 80°F. The unit indoor
design temperature range is between 65°F and 80°F in the heating
mode.

Never operate the unit in the cooling mode at outdoor temperatures
below 60°F without a low ambient control. Never operate the unit in
the heating mode at outdoor temperatures above 70°F.

Turn the heat/cool switch to the

heat position and set the desired temperature on the thermostat
temperature dial.

Most heat pump installations include

electric resistance heat for auxiliary heat (when the outdoor
temperature is too low for the heat pump to provide enough heat)
and for emergency heat (the outdoor unit is not working). On a
properly-sized installation the heat pump will supply all the heat you
will need during cool weather. As the temperature drops, the heat
output from the heat pump will be reduced. The auxiliary heat
installed in your system will come on as needed to make up for this
reduction of heat output.

The need for auxiliary heat is detected by your thermostat. If the
thermostat senses a temperature fall of more than 2°F below the set
point, the auxiliary heat will turn on.  For this reason, setting the
thermostat to the desired temperature and not changing the
temperature during the day can be more economical than varying
the thermostat setting.

If you intend to set the temperature back at night, you should
consider that, when the temperature is turned back up to the normal
setting, the system will be operating during the coldest time of the
day (early morning hours) and may require auxiliary heat if the
increase in temperature is above 2°F.

This switch will turn the outdoor unit

off and use the electric auxiliary heat only to provide heat. If outdoor
unit should malfunction, turn the emergency heat switch to the ON
position and contact your service person.

Your heat pump has a control system designed to defrost the
outdoor coil by warming it up to keep it clear of ice and operating
efficiently. When the temperature drops below 40°F, the control
system will sense that conditions are right for the formation of ice.
After a time period of 60 to 90 minutes, the heat pump will go into
the defrost mode. At this time, the outdoor coil may be heavily iced
or no ice may be visible, depending on the outdoor humidity. When
the unit starts the defrost mode, the outdoor fan will turn off and
you may hear a hissing noise that disappears as defrost continues.
As the outdoor coil warms, you may notice steam coming off the
coil. When the coil reaches a predetermined temperature (usually
within 7 minutes), the defrost cycle will end. You may hear a hiss
as the unit switches back to the normal heating mode.

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