Pre-Service Check - Lennox SL18XC1 Installation Instructions Manual

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.
S Trim shrubbery away from the unit and periodically
check for debris which collects around the unit.
S 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 ComfortSense
mostat homeowner manual for instructions on how to op­
erate your thermostat.

Pre-Service Check

If your system fails to operate, check the following before
calling for service:
S
Verify room thermostat settings are correct.
S
Verify that all electrical disconnect switches are ON.
S
Check for any blown fuses or tripped circuit breakers.
S
Verify unit access panels are in place.
S
Verify air filter is clean.
S
If service is needed, locate and write down the unit
model number and have it handy before calling.
Professional Maintenance
Your heating and air conditioning system should be in­
spected and maintained yearly (before the start of the cool­
ing and heating seasons) by a licensed professional HVAC
technician. You can expect the technician to check the fol­
lowing items. These checks may only be conducted by
a licensed professional HVAC technician.
Outdoor Unit
1. Inspect component wiring for loose, worn or damaged
connections. Also check for any rubbing or pinching of
wires. Confirm proper voltage plus amperage of outdoor
unit.
2. Check the cleanliness of outdoor fan and blade as­
semblies. Check condition of fan blades (cracks).
Clean or replace them, if necessary.
3. Inspect base pan drains for debris and clean as neces­
sary.
®
7000 or iComfort -enabled ther­
4. Inspect the condition of refrigerant piping and confirm
that pipes are not rubbing copper-to-copper. Also,
check the condition of the insulation on the refrigerant
lines. Repair, correct, or replace as necessary.
5. Test capacitor. Replace as necessary.
6. Inspect contactor contacts for pitting or burn marks.
Replace as necessary.
7. Check outdoor fan motor for worn bearings/bushings.
Replace as necessary.
8. Inspect and clean outdoor coils, if necessary and note
any damage to coils or signs of leakage.
Failure to follow instructions will cause damage to
the unit.
This unit is equipped with an aluminum coil. Alu­
minum coils may be damaged by exposure to solu­
tions with a pH below 5 or above 9. The aluminum
coil should be cleaned using potable water at a
moderate pressure (less than 50psi). If the coil can­
not be cleaned using water alone, Lennox recom­
mends use of a coil cleaner with a pH in the range of
5 to 9. The coil must be rinsed thoroughly after
cleaning.
In coastal areas, the coil should be cleaned with
potable water several times per year to avoid corro­
sive buildup (salt).
Indoor Unit (Air Handler or Furnace)
1. Inspect component wiring for loose, worn or damaged
connections. Confirm proper voltage plus amperage
indoor unit.
2. Inspect and clean or replace air filters in indoor unit.
3. Check the cleanliness of indoor blower and clean
blower, if necessary.
4. Inspect the evaporator coil (Indoor) drain pans and
condensate drains for rust, debris, obstructions, leaks
or cracks. Pour water in pans to confirm proper
drainage from the pan through to the outlet of the pipe.
Clean or replace as necessary.
5. Inspect and clean evaporator (indoor) coil, if necessary.
6. Inspect the condition of the refrigerant lines and con­
firm that pipes are not rubbing copper-to-copper. Also,
ensure that refrigerant pipes are not being affected by
indoor air contamination. Check condition of insulation
on the refrigerant lines. Repair, correct, or replace as
necessary.
7. Inspect the duct system for leaks or other problems.
Repair or replace as necessary.
8. Check for bearing/bushing wear on indoor blower mo­
tor. Replace as necessary.
9. Indoor unit inspections of gas- or oil-fired furnaces will
also include inspection and cleaning of the burners,
and a full inspection of the gas valve, heat exchanger
and flue (exhaust) system.
General System Test with System Operating
1. Your technician should perform a general system test.
He will turn on the air conditioner to check operating
functions such as the start­up and shut­off operation.
He will also check for unusual noises or odors, and
measure indoor/outdoor temperatures and system
pressures as needed.
Page 15
NOTICE !
SL18XC1 SERIES