Lennox XP14 Elite Series Installation Instructions Manual page 24

coil temperature remains below 35°F (2°C), the
demand defrost control will initiate a defrost cycle.
,WARNING I
Before the start of each heating and cooling season, the
following service checks should be performed by a
qualified service technician. First, turn off electrical power
to the unit prior to performing unit maintenance.
• Inspect and clean the outdoor and indoor coils. 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.)
• Visually inspect the refrigerant lines and coils for leaks.
• Check wiring for loose connections.
• Check voltage at the indoor and outdoor units (with
units operating).
• Check the amperage draw at the outdoor fan motor,
compressor, and indoor blower motor. Values should
be compared with those given on unit nameplate.
• Check, clean (or replace) indoor unit filters.
• Check the refrigerant charge and gauge the system
pressures.
• Check the condensate drain line for free and
unobstructed flow; clean, if necessary.
• 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.
NOTE - if owner reports insufficient cooling, the unit
should be gauged and refrigerant charge checked.
Refer to section on refrigerant charging in this
instruction.
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.
IMPORTANT
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.
A IMPORTANT
.
Outdoor Unit--Make sure no obstructions restrict
airflow to the outdoor unit. Leaves, trash or shrubs
crowding the unit cause the outdoor unit to work harder
and use more energy. Keep shrubbery trimmed away
from the unit and periodically check for debris which
collects around the unit.
When removing debris from around the unit, be aware
of metal edges on parts and screws. Although special
care has been taken to keep exposed edges to a
minimum, physical contact with metal edges and
corners while applying excessive force or rapid motion
can result in personal injury.
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 air
conditioning or heat pump system.
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