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Maintenance
DEALER
Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each
cooling season, the system should be checked as follows:
Outdoor Unit
1. Clean and inspect the outdoor coil. The coil may be
flushed with a water hose. Ensure the power is turned
off before you clean the coil.
2. Outdoor fan motor is prelubricated and sealed. No
further lubrication is needed.
3. Visually inspect connecting lines and coils for
evidence of oil leaks.
4. Check wiring for loose connections.
5. Check for correct voltage at the unit (with the unit
operating).
6. Check amp−draw outdoor fan motor.
UNIT NAMEPLATE: _________ ACTUAL: __________
NOTE − If owner reports insufficient cooling, the unit should
be gauged and refrigerant charge checked.
Outdoor Coil
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 (e.g., pet
urine, cottonwood seeds, fertilizers, fluids that may contain
high levels of corrosive chemicals such as salts)
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Outdoor Coil
The outdoor coil may be flushed with
a water hose.
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Outdoor Coil (Sea Coast)
locations can carry salt, which is corrosive to most
metal. Units that are located near the ocean require
frequent inspections and maintenance. These
inspections will determine the necessary need to wash
the unit including the outdoor coil. Consult your
installing contractor for proper intervals/procedures
for your geographic area or service contract.
INDOOR UNIT
1. Clean or change filters.
2. Adjust blower speed for cooling. Measure the pressure
drop over the coil to determine the correct blower CFM.
Refer to the unit information service manual for pressure
drop tables and procedure.
3. Check blower drive belt for wear and proper tension.
4. Check all wiring for loose connections
5. Check for correct voltage at unit (blower operating).
6. Check amp−draw on blower motor.
UNIT NAMEPLATE: _________ ACTUAL: __________
INDOOR COIL
1. Clean coil, if necessary.
2. Check connecting lines and coils for signs of oil leaks.
3. Check condensate line and clean, if necessary.
506728−01
Moist air in ocean
Page 30
NOTE
The filter and all access panels must be in place
any time the unit is in operation.
HOMEOWNER
Cleaning of the outdoor unit's coil should be performed by
a trained service technician. Contact your dealer and set
up a schedule (preferably twice a year, but at least once a
year) to inspect and service your outdoor unit. The
following maintenance may be performed by the
homeowner.
IMPORTANT
Sprinklers and soaker hoses should not be installed
where they could cause prolonged exposure to the
outdoor unit by treated water. Prolonged exposure of the
unit to treated water (i.e., sprinkler systems, soakers,
waste water, etc.) will corrode the surface of steel and
aluminum parts and diminish performance and longevity
of the unit.
Outdoor Coil
The outdoor unit must be properly maintained to ensure its
proper operation.
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Please contact your dealer to schedule proper
inspection and maintenance for your equipment.
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Make sure no obstructions restrict airflow to the
outdoor unit.
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Grass clippings, leaves, or shrubs crowding the unit
can cause the unit to work harder and use more
energy.
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Keep shrubbery trimmed away from the unit and
periodically check for debris which collects around the
unit.
Routine Maintenance
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.
1. Air Filter
Ask your Lennox dealer to show you
where your 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.
2. Disposable Filter
replaced with a filter of the same type and size.
NOTE
If you are unsure about the filter required for your
system, call your Lennox dealer for assistance.
3. Reusable Filter
with reusable foam filters. Clean foam filters with a
mild soap and water solution; rinse thoroughly; allow
filter to dry completely before returning it to the unit or
grille.
NOTE
The filter and all access panels must be in place
any time the unit is in operation.
4. Indoor Unit
The indoor unit's evaporator coil is
equipped with a drain pan to collect condensate
formed as your 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
would also apply to an auxiliary drain, if installed.)
Disposable filters should be
Many indoor units are equipped
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