Page 22
Maintenance
WARNING
Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.
Maintenance and service must be performed by a qualified
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.
Unit 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.
Indoor Coil
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.
Indoor Unit
1 - Clean or change filters.
2 - Lennox blower motors are prelubricated and permanent-
ly 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__________.
Optional Accessories
Refer to the Engineering Handbook for optional accesso-
ries that may apply to this unit. The following may or may
not apply:
Loss of Charge Kit
High Pressure Switch Kit
Compressor Monitor
Compressor Crankcase Heater
Hail Guards
Mounting Bases
Stand−off Kit
Sound Cover
Low Ambient Kit
Monitor Kit
Mild Weather Kit
Homeowner Information
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.
Ask your Lennox dealer to show you where your indoor
unit’s filter is located. It will be either at the indoor unit
(installed internal or external to the cabinet) or behind a re-
turn 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. If you are unsure about the filter you
need for your system, call your Lennox dealer for assis-
tance.
IMPORTANT
Turn off electrical power to the unit at the disconnect
switch before performing any maintenance. The unit
may have multiple power supplies.
Many indoor units are equipped with reusable foam fil-
ters. These filters can be cleaned with a mild soap and
water solution. Rinse the filter thoroughly and let it dry
completely before it is returned to the unit or grille.
The filter and all access panels must be in place any
time the unit is in operation.
Your system may be equipped with an electronic air clean-
er which will provide respiratory relief by removing up to 90
percent of all airborne particles which pass through it. If it
is, ask your dealer to instruct you on its maintenance.
Your indoor coil is equipped with a drain pan to collect con-
densate formed as your system removes humidity from the
inside air. Have your dealer show you where the main con-
densate drain (and auxiliary drain, if applicable) runs and
how to check the drain for any obstruction.
It is also very important to provide unrestricted airflow to the
outdoor unit. Leaves, trash or shrubs crowding the unit
cause the outdoor unit to work harder and use more ener-
gy. Keep shrubbery trimmed away from the unit and period-
To Next Page
Loading...
Need help?
General
