Lennox Elite XC16 User Manual

Page 21
XC16 SERIES
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. Blower motors are prelubricated and permanently
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.
Unit Nameplate: _________ Actual: __________
TWO−STAGE COMPRESSOR CHECKS
Use the checklist procedure on page 23, to verify part-load
and full-load capacity operation of two-stage modulation
compressors.
IMPORTANT
This performance check is ONLY valid on systems
that have clean indoor and outdoor coils, proper
airflow over coils, and correct system refrigerant
charge. All components in the system must be
functioning proper to correctly perform compressor
modulation operational check. (Accurate
measurements are critical to this test as indoor
system loading and outdoor ambient can affect
variations between low and high capacity readings).
Tools Required
S Refrigeration gauge set
S Digital volt/amp meter
S Electronic temperature thermometer
S On-off toggle switch
Procedure
NOTE − Block outdoor coil to maintain a minimum of 375
psig during testing).
1. Turn main power OFF to outdoor unit.
2. Adjust room thermostat set point 5ºF above the room
temperature.
3. Remove control access panel. Install refrigeration
gauges on unit. Attach the amp meter to the common
(black wire) wire of the compressor harness. Attach
thermometer to discharge line as close as possible to
the compressor.
4. Turn toggle switch OFF and install switch in series with
Y2 wire from room thermostat.
5. Cycle main power ON.
6. Allow pressures and temperatures to stabilize before
taking measurements (may take up to 10 minutes).
7. Record all of the readings for the Y1 demand.
8. Close switch to energize Y2 demand. Verify power is
going to compressor solenoid.
9. Allow pressures and temperatures to stabilize before
taking any measured reading (this may take up to 10
minutes).
10. Record all of the readings with the Y1 and Y2 demand.
11. If temperatures and pressures change in the direction
noted in chart, the compressor is properly modulating
from low to high capacity. (If no amperage, pressures
or temperature readings change when this test is
performed, the compressor is not modulating between
low and high capacity and replacement is necessary).
12. After testing is complete, return unit to original set up.
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.
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.
IMPORTANT
Turn off electrical power to the unit at the
disconnect switch before performing any
maintenance. The unit may have multiple power
supplies.
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 Air CleanerSome systems are
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

Lennox Elite XC16 Specifications

General

Brand	Lennox
Model	Elite XC16
Category	Air Conditioner
Language	English