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the drain line and how to check for obstructions. This
would also apply to an auxiliary drain, if installed.
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 and diminish perfor-
mance and longevity of the unit.
6. Outdoor UnitMake 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.
THERMOSTAT OPERATION
Thermostat operations vary from one thermostat to
another. The following provides general operation
procedures. Refer to the user’s information manual
provided with your thermostat for specific operation
details.
Temperature Setting Levers
Set the lever or dial to the desired temperature setpoints
for both heating and cooling. Avoid frequent temperature
adjustment; turning the unit offthen back onbefore
pressures can equalize will put stress on the unit’s
compressor.
Fan Switch
In AUTO or INT (intermittent) mode, the blower operates
only when the thermostat calls for heating or cooling. This
mode is generally preferred when humidity control is a
priority. The ON or CONT mode provides continuous
indoor blower operation, regardless of whether the
compressor or furnace is operating. This mode is required
when constant air circulation or filtering is desired.
System Switch
Set the system switch for heating, cooling or auto
operation. The auto mode allows the system to
automatically switch from heating mode to cooling mode to
maintain predetermined comfort settings.
Temperature Indicator
The temperature indicator displays the actual room
temperature.
PROGRAMMABLE THERMOSTATS
Your Lennox system may be controlled by a
programmable thermostat. These thermostats provide the
added feature of programmable time-of-day setpoints for
both heating and cooling. Refer to the user’s information
manual provided with your thermostat for detailed
programming and operation details.
Preservice Check
If your system fails to operate, check the following before
calling for service:
S Make sure all electrical disconnect switches are ON.
S Make sure the room thermostat Temperature Selector
and System Switch (Heat, Cool, Auto) are properly
set.
S If you discover any blown fuses or tripped circuit
breakers, call your Lennox dealer for assistance.
S Make sure unit access panels are in place.
S Make sure air filter is clean.
S Write down the unit model number and have it handy
before calling.
OPTIONAL ACCESSORIES
Refer to the Engineering Handbook for the latest optional
accessories available for XC16 series. Below is a list of
some of the optional accessories that may be available:
S Hard Start Kit
S Low Ambient Kit
S Timed Off Control
S Sound Cover
S Base Pan
S Suction Line Drier
S Crankcase Heater
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