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Homeowner Information
CAUTION
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
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.
The system should be inspected and serviced before each
cooling and heating season by a licensed professional
HVAC service technician (or equivalent).
Heat Pump Operation
Your new Lennox heat pump has several characteristics
that you should be aware of:
S
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 furnace which deliver lower volumes of consid
erably
hotter
air to heat the space.
S
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). The heat pump control activates a
defrost cycle lasting 5 to 15 minutes at preset intervals
to clear the outdoor coil of the frost.
S
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 conclu
sion of the defrost cycle.
Homeowner Maintenance
The following maintenance may be performed by the
homeowner.
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Contact a licensed professional HVAC technician to
schedule inspection and maintenance appointments for
your equipment before each heating and cooling sea
son.
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Check the indoor unit filter each month and replace the
filter, if necessary.
Have your Lennox dealer show you where your indoor
unit 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.
S
Check the indoor unit drain line for obstructions monthly
during the cooling season.
The indoor 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 ob
structions. (This would also apply to an auxiliary drain,
if installed.)
S
Check the area around the outdoor unit monthly and re
move any obstructions that may restrict airflow to the
outdoor unit. This would include grass clippings, leaves,
or papers that may have settled around the unit.
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Trim shrubbery away from the unit and periodically
check for debris which collects around the unit.
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During the winter months, keep the snow level below the
louvered panels.
NOTE
-
The filter and all access panels must be in place
any time the unit is in operation. If you are unsure about the
filter required for your system, call your Lennox dealer for
assistance.
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, diminish performance
and affect longevity of the unit.
Thermostat Operation
See the iComfort
®
thermostat homeowner manual for in
structions on how to operate your thermostat.
Preservice Check
If your system fails to operate, check the following before
calling for service:
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Verify room thermostat settings are correct.
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Verify that all electrical disconnect switches are ON.
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Check for any blown fuses or tripped circuit breakers.
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Verify unit access panels are in place.
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Verify air filter is clean.
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If service is needed, locate and write down the unit
model number and have it handy before calling.
Extended Power Outage
The heat pump is equipped with a compressor crankcase
heater which protects the compressor 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 satis
fied 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.
Professional Maintenance
Your heat pump system should be inspected and main
tained yearly (before the start of the heating and cooling
seasons) by a licensed professional HVAC technician. You
can expect the technician to check the following items.
These checks may only be conducted by a licensed
professional HVAC technician.
