Maintenance - Lennox EL16XP1 Series Unit Information

IMPORTANT
After testing has been completed, properly reposition
test jumper across desired timing pins

Maintenance

DEALER
WARNING
Electric Shock Hazard. Can cause injury or
death. Unit must be properly grounded in
accordance with national and local codes.
Line voltage is present at all components
when unit is not in operation on units with
single-pole contactors. Disconnect all remote
electric power supplies before opening
access panel. Unit may have multiple power
supplies.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
NOTICE !
Failure to follow instructions will cause damage to
the unit.
This unit is equipped with an aluminum coil.
Aluminum coils may be damaged by exposure to
solutions with a pH below 5 or above 9. The alumi-
num coil should be cleaned using potable water
at a moderate pressure (less than 50psi). If the
coil cannot be cleaned using water alone, Lennox
recommends 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).
Maintenance and service must be performed by a quali-
fied installer or service agency. At the beginning of each
cooling season, the system should be checked as follows:
Outdoor Unit
1 - Clean and inspect outdoor coil (may be flushed with
a water hose). Ensure power is off before cleaning.
2 - Outdoor unit fan motor is pre-lubricated and sealed.
No further lubrication is needed.
3 - Visually inspect all connecting lines, joints and coils
for evidence of oil leaks.
4 - Check all wiring for loose connections.
5 - Check for correct voltage at unit (unit operating).
6 - Check amp draw on outdoor fan motor.
Motor Nameplate:_________ Actual:__________.
7 - Inspect drain holes in coil compartment base and
clean if necessary.
NOTE – If insufficient heating or cooling occurs, the
unit should be gauged and refrigerant charge should be
checked.
It may be necessary to flush the outdoor coil more fre-
quently if it is exposed to substances which are corrosive
or which block airflow across the coil (e.g., pet urine, cot-
tonwood seeds, fertilizers, fluids that may contain high
levels of corrosive chemicals such as salts)
• Outdoor Coil – The outdoor coil may be flushed with a
water hose.
• 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 in-
spections and maintenance. These inspections will de-
termine 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.
1. Clean or change filters.
2. Lennox blower motors are prelubricated and perma-
nently sealed. No more lubrication is needed.
3. Adjust blower speed for cooling. Measure the pressure
drop over the coil to determine the correct blower CFM.
Refer to the unit information service manual for pressure
drop tables and procedure.
4. Belt Drive Blowers - Check belt for wear and proper
tension.
5. Check all wiring for loose connections.
6. Check for correct voltage at unit. (blower operating)
7. Check amp draw on blower motor.
Motor Nameplate:_________ Actual:__________.
1 - Clean coil if necessary.
2 - Check connecting lines, joints and coil for evidence
of oil leaks.
3 - Check condensate line and clean if necessary.
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. The follow-
ing maintenance may be performed by the homeowner.
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Outdoor Coil
Indoor Unit
Indoor Coil
HOMEOWNER