Allied Air Enterprises 4HP16LT - Manual (Page 26)

506468-01 Issue 1004 Page 26
HOMEOWNER INFORMATION
In order to ensure peak performance, your system must be
properly maintained. Clogged filters and blocked airflow
prevent your unit from operating at its most efficient level.
Turn all electric power to unit OFF at discon-
nect switch(es) before performing any mainte-
nance operations on system. Unit may have
multiple power supplies. Electrical shock could
cause personal injury or death.
WARNING
• Ask your dealer to show you where the indoor unit’s
filter is located. It will be either at the indoor unit
(installed internal or external to the cabinet) or behind
a return air grille in the wall or ceiling. Check the filter
monthly and clean or replace it as needed.
• Disposable filters should be replaced with a filter of
the same type and size. If you unsure of the filter you
need for your system, contact your dealer.
• Many indoor units are equipped with reusable foam
filters. These filters can be cleaned with a mild soap
and water solution. Rinse the filter thoroughly and let
dry completely before returning to unit or grille.
The filter and all access panels must be in place
any time the unit is in operation.
• Some systems are equipped with an electronic air
cleaner, designed to remove the majority of airborne
particles from the air passing through the cleaner. If
your system includes an electronic air cleaner, ask
your dealer for maintenance instructions.
• Inspect and clean indoor coil. The indoor evaporator
coil is equipped with a drain pan to collect condensate
formed as the system removes humidity from the
inside air. Have your dealer show you the location of
the drain line and how to check for obstructions. This
also applies to an auxiliary drain, if one is installed.
• Inspect and clean outdoor coil:
Make sure no obstructions restrict airflow to the
outdoor unit. Leaves, trash, or shrubs crowding the unit
can cause it to work harder and use more energy. Keep
shrubbery trimmed away from the unit and periodically
check for debris which collects around the unit.
The outdoor coil may require frequent cleaning,
depending on environmental conditions. Clean the
outdoor coil with an unpressurized water hose to
remove surface contaminants and debris. It may be
necessary to flush the outdoor coil more frequently if it
is exposed to substances which are corrosive or
which block airflow across the coil (such as pet urine,
cottonwood seeds, etc...).
Heat Pump Operation
Heat pump units have several characteristics 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-fired, oil-fired, or electric
furnaces 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 tempera-
tures are below 45°F. An electronic control activates a
defrost cycle lasting 5 to 15 minutes at preset inter-
vals to clear the outdoor coil of the frost. A shift in
sound type does occur during the defrost mode.
• During the defrost cycle, you may notice steam rising
from the unit. This is a normal occurrence. The
thermostat may engage auxiliary heat during the
defrost cycle to satisfy a heating demand. The unit will
return 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 the
outdoor unit has been interrupted for 6 hours or longer,
observe the following when restoring power to the 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 pres-
sures and temperatures enough time to return to a
stabilized condition.
• In the Emergency Heat mode, all heating demand is
satisfied by auxiliary heat; heat pump operation is
locked out. After a 6-hour “warmup” period, the
thermostat can then be switched to the “Heat” setting
and normal heat operation may resume.
Thermostat Operation
Though your thermostat may vary somewhat from the
description below, its operation will be similar.
Temperature Setting Levers
Most heat pump thermostats have two temperature
selector levers: one for heating and one for cooling. Set
the levers or dials to the desired temperature setpoints for
both heating and cooling. Avoid frequent temperature