Page 21
Indoor Unit
1. Clean or change filters.
2. Lennox blower motors are prelubricated and perma
-
nently sealed. No more lubrication is needed.
3. 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.
4. Belt Drive Blowers - Check belt for wear and proper
tension.
5. Check all wiring for loose connections.
6. Check for correct voltage at unit. (blower operating)
7. Check amp draw on blower motor.
Motor Nameplate:_________ Actual:__________.
Indoor Coil
1 - Clean coil if necessary.
2 - Check connecting lines, joints and coil for evidence
of oil leaks.
3 - Check condensate line and clean if necessary.
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 follow-
ing 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
the steel and aluminum parts, diminish performance
and affect longevity of the unit.
Outdoor Coil
The outdoor unit must be properly maintained to ensure
its proper operation.
• Please contact your dealer to schedule proper inspec-
tion and maintenance for your equipment.
•
Make sure no obstructions restrict airflow to the outdoor unit.
• Grass clippings, leaves, or shrubs crowding the unit can
cause the unit to work harder and use more energy.
• Keep shrubbery trimmed away from the unit and peri-
odically 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
– Disposable filters should be
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
– Many indoor units are equipped
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 -
Electronic Air Cleaner
– Some systems are
equipped with an electronic air cleaner, designed
to remove airborne particles from the air passing
through the cleaner. If your system is so equipped,
ask your dealer for maintenance instructions.
5 -
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.)
Thermostat Operation
See the thermostat homeowner manual for instructions on
how to operate your thermostat.
Preservice Check
If your system fails to operate, check the following before
calling for service:
• Verify room thermostat settings are correct.
• Verify that all electrical disconnect switches are ON.
• Check for any blown fuses or tripped circuit breakers.
• Verify unit access panels are in place.
•
Verify air filter is clean.
• If service is needed, locate and write down the unit
model number and have it handy before calling.
Accessories
For update-to-date information, see any of the following
publications:
•
Lennox 16ACX Product Specification bulletin
•
Lennox Product Catalog
•
Lennox Price Book
Servicing Units Void of Charge
If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1 -
Leak check system using procedure outlined on
page 15.
2 - Evacuate the system using procedure outlined on
page 16.
3 - Use nitrogen to break the vacuum and install a new
filter drier in the system.
