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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.
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Outdoor Coil
: 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, fertilizers, fluids
that may contain high levels of corrosive chemicals
such as salts).
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Outdoor Coil (Sea Coast)
Moist air in ocean
locations can carry salt, which is corrosive to most
metal. Units that are located near the ocean
require frequent inspections and maintenance.
These inspections will determine the necessary
need to wash the unit including the outdoor coil.
Consult your installing contractor for proper
intervals/procedures for your geographic area or
service contract.
HEAT PUMP OPERATION
Your new Lennox heat pump has several characteristics
that you should be aware of:
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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
considerably
hotter
air to heat the space.
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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 cycle lasting 5 to 15 minutes at preset intervals
to clear the outdoor coil of the frost.
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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 defrost 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
EMERGENCY HEAT setting to obtain temporary heat
without the risk of serious damage to the heat pump.
In EMERGENCY HEAT mode, all heating demand is
satisfied 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.
THERMOSTAT OPERATION
See the ComfortSense
®
5000 or 7000 series thermostats
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:
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Make sure the room thermostat temperature selector
and system switch (Heat, Cool, Auto) are properly set.
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Check to see that all electrical disconnect switches are
ON.
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Check for any blown fuses or tripped circuit breakers.
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Make sure unit access panels are in place.
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Make sure 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.
OPTIONAL ACCESSORIES
Optional accessories for the XPG15 include the following:
Accessory
Lennox Catalog Number
Low Ambient Kit
54M89
Snow Guard Top Cover
X8782
Snow Shield Kit
44W14
Optional Vapor Line Drier
88K44
NOTE The XPG15 unit will be inactive below 32ºF
(0ºC). To prevent heavy snow accumulation in the unit
during these inactive periods, Lennox recommends the
installation of the Snow Guard Top Cover and the Snow
Shield Kit.
Figure 29. Snow Guard Top Cover (X8782)
For a complete list of all available accessories, see XPG15
Engineering Handbook.
