SDigital volt/amp meter
SElectronic temperature thermometer
S
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
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 following maintenance may be performed by the homeowner.
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 and diminish performance and longevity of the unit.
Outdoor Coil
The outdoor unit must be properly maintained to ensure its proper operation.
SPlease contact your dealer to schedule proper inspection and maintenance for your equipment.
SMake sure no obstructions restrict airflow to the outdoor unit.
SGrass clippings, leaves, or shrubs crowding the unit can cause the unit to work harder and use more energy.
SKeep shrubbery trimmed away from the unit and periodically check for debris which collects around the unit.
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.
Routine 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.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.)
Thermostat Operation
See the thermostat homeowner manual for instructions on how to operate your thermostat.
Preservice Check
If your system fails to operate, check the following before calling for service:
SVerify room thermostat settings are correct.
SVerify that all electrical disconnect switches are ON.
SCheck for any blown fuses or tripped circuit breakers.
SVerify unit access panels are in place.
SVerify air filter is clean.
SIf service is needed, locate and write down the unit model number and have it handy before calling.
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XC16 SERIES
