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Maintenance
Before the start of each heating and cooling season, the
following service checks should be performed by a
qualified service technician.
As always, electrical power to the unit must be turned
off prior to any unit maintenance.
WARNING
Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.
The outdoor and indoor coils should be inspected
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and cleaned. The outdoor coil may be flushed with
a water hose.
NOTE − 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, etc.)
The refrigerant lines should be visually inspected and
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the coils should be checked for leaks.
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Wiring should be checked for loose connections.
Voltage must be checked at the indoor and outdoor
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units (units operating).
The amp-draw at the outdoor fan motor and indoor
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blower motor should be checked. Values should be
compared with those given on unit nameplate.
Indoor unit filters should be cleaned or replaced.
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The refrigerant charge should be checked and
system pressures should be gauged.
The condensate drain line should be checked for
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free and unobstructed flow and it should be
cleaned, if necessary.
Condenser fan motor is prelubricated and sealed.
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No further lubrication is needed.
NOTE − If owner complains of insufficient cooling, the unit
should be gauged and refrigerant charge checked. Refer
to section on refrigerant charging in this instruction.
Optional Accessories
Refer to the Engineering Handbook for optional accesso-
ries that may apply to this unit. The following may or may
not apply:
Loss of Charge Kit
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High Pressure Switc Kit
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Compressor Monitor
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Compressor Crankcase Heater
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Hail Guards
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Mounting Bases
Timed Off Control
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Stand−off Kit
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Sound Cover
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Low Ambient Kit
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Dave Lennox Signaturet Room Thermostat
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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.
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.
Disposable filters should be replaced with a filter of the
same type and size. If you are unsure about the filter you
need for your system, call your Lennox dealer for assis-
tance.
Turn off electrical power to the unit at the disconnect
switch before performing any maintenance. The unit
may have multiple power supplies.
Many indoor units are equipped with reusable foam fil-
ters. These filters can be cleaned with a mild soap and
water solution. Rinse the filter thoroughly and let it dry
completely, before it is returned to the unit or grille.
The filter and all access panels must be in place any
time the unit is in operation.
Your system may be equipped with an electronic air
cleaner which will provide respiratory relief by removing
up to 90 percent of all airborne particles which pass
through it. If it is, ask your dealer to instruct you on its
maintenance.
Page 23
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