Lennox EL16XP1 Series Unit Information page 26

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 the thermostat.
Your new Lennox heat pump has several characteristics
that 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- or oil-fired furnaces or an electric fur-
nace 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 temperatures are below
45°F (7°C). An electronic control activates a defrost cy-
cle lasting 5 to 15 minutes at preset intervals to clear the
outdoor coil of the frost.
• During the defrost cycle, you may notice steam rising
from the outdoor unit. This is a normal occurrence. The
thermostat may engage auxiliary heat during the defrost
cycle to satisfy a heating demand; however, the unit will
return to normal operation at the conclusion of the de-
frost cycle.
Extended Power Outage
The heat pump is equipped with a compressor crankcase
heater which protects the compressor from refrigerant
slugging during cold weather operation.
If power to your unit has been interrupted for several hours
or more, set the room thermostat selector to the EMER-
GENCY HEAT setting to obtain temporary heat without
the risk of serious damage to the heat pump.
In EMERGENCY HEAT mode, all heating demand is sat-
isfied by auxiliary heat; heat pump operation is locked out.
After a six-hour compressor crankcase warm-up period,
the thermostat can be switched to the HEAT setting and
normal heat pump operation may resume.
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.
For update-to-date information, see any of the following
publications:
• Lennox EL16XP1 Product Specification bulletin
• Lennox Product Catalog
• Lennox Price Book
Page 26
Heat Pump Operation
Preservice Check
Accessories