System Operation; Maintenance; Homeowner Information - Lennox XC14 Installation Instructions Manual

INSTALLING SERVICE VALVE CAPS
Disconnect gauge set and re−install both the liquid and
suction service valve caps.
OUTDOOR UNIT
SERVICE VALVE
Figure 40. Installing Service Valve Port Caps

System Operation

The outdoor unit and indoor blower cycle on demand from
the room thermostat. When the thermostat blower switch
is in the ON position, the indoor blower operates
continuously.
HIGH PRESSURE SWITCH
XC14 units are equipped with a high-pressure switch that
is located in the liquid line of the compressor as illustrated
in Unit Dimensions on page 2. The switch is a Single Pole,
Single Throw (SPST), manual−reset switch with red cap
that is normally closed and removes power from the
compressor when discharge pressure rises above factory
setting at 590 + 10 psi.
DISCHARGE THERMOSTAT
Each XC14 unit is equipped with a discharge thermostat
located in the discharge line of the compressor. The switch
(SPST, auto−reset, normally closed) and removes power
from the compressor when discharge temperature
exceeds the factory setting of 220
FILTER DRIER
A filter drier is factory-installed as illustrated in Unit
Dimensions on page 2, with each XC14 unit to ensure a
clean, moisture−free system. A replacement filter drier is
available from Lennox. Refer to Lennox Repair Part
Program.

Maintenance

WARNING
Improper installation,
service or maintenance can cause personal injury,
loss of life, or damage to property.
Installation and service must be performed by a
licensed professional installer (or equivalent) or a
service agency.
At the beginning of each cooling season, the system
should be checked as follows:
1. Clean and inspect the outdoor coil. The coil may be
flushed with a water hose. Ensure the power is turned
off before you clean the coil.
2. Outdoor fan motor is prelubricated and sealed. No
further lubrication is needed.
3. Visually inspect connecting lines and coils for
evidence of oil leaks.
4. Check wiring for loose connections.
INSTALL CAPS
º º
F +5 F.
adjustment, alteration,
5. Check for correct voltage at the unit (with the unit
operating).
6. Check amp−draw outdoor fan motor.
UNIT NAMEPLATE: _________ ACTUAL: __________
NOTE − If owner reports insufficient cooling, the unit should
be gauged and refrigerant charge checked.
INDOOR COIL
1. Clean coil, if necessary.
2. Check connecting lines and coils for signs of oil leaks.
3. Check condensate line and clean, if necessary.
INDOOR UNIT
1. Clean or change filters.
2. 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.
3. Check blower drive belt for wear and proper tension.
4. Check all wiring for loose connections
5. Check for correct voltage at unit (blower operating).
6. Check amp−draw on blower motor.
UNIT NAMEPLATE: _________ ACTUAL: __________

Homeowner Information

MAINTENANCE
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.
1. Air Filter 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 return air grille in the wall or ceiling. Check
the filter monthly and clean or replace it as needed.
2. Disposable Filter Disposable filters should be
replaced with a filter of the same type and size.
NOTE − If you are unsure about the filter required for
your system, call your Lennox dealer for assistance.
3. Reusable Filter Many indoor units are equipped
with reusable foam filters. Clean foam filters with a
mild soap and water solution; rinse thoroughly; allow
filter to dry completely before returning it to the unit or
grille.
NOTE − The filter and all access panels must be in
place any time the unit is in operation.
4. Electronic
equipped with an electronic air cleaner, designed to
remove airborne particles from the air passing through
the cleaner. If your system is so equipped, ask your
dealer for maintenance instructions.
5. Indoor Unit The indoor unit's evaporator coil is
equipped with a drain pan 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 obstructions. (This
would also apply to an auxiliary drain, if installed.)
Page 23
Air Cleaner Some systems are
XC14 SERIES