Lennox Merit Series Installation Instructions Manual page 15

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, diminish performance
and affect longevity of the unit.
Thermostat Operation
See the ComfortSense
manual for instructions on how to operate your thermostat.
Pre-Service Check
If your system fails to operate, check the following before
calling for service:
Verify room thermostat settings are correct.
●
Verify that all electrical disconnect switches are ON.
●
Check for any blown fuses or tripped circuit breakers.
●
Verify unit access panels are in place.
●
Verify air filter is clean.
●
If service is needed, locate and write down the unit
●
model number and have it handy before calling.
Professional Maintenance
Your heating and air conditioning system should be
inspected and maintained yearly (before the start of the
cooling and heating seasons) by a licensed professional
HVAC technician. You can expect the technician to check
the following items. These checks may only be
conducted by a licensed
technician.
Outdoor Unit
1 - Inspect component wiring for loose, worn or damaged
connections. Also check for any rubbing or pinching of
wires. Confirm proper voltage plus amperage outdoor
unit.
2 - Check the cleanliness of outdoor fan and blade
assemblies. Check condition of fan blades (cracks).
Clean or replace them, if necessary.
3 - Inspect base pan drains for debris and clean as
necessary.
4 - Inspect the condition of refrigerant piping and confirm
that pipes are not rubbing copper-to-copper. Also,
check the condition of the insulation on the refrigerant
lines. Repair, correct, or replace as necessary.
5 - Test capacitor. Replace as necessary.
6 - Inspect contactor contacts for pitting or burn marks.
Replace as necessary.
®
7000 thermostat homeowner
professional
7 - Check outdoor fan motor for worn bearings/bushings.
Replace as necessary.
8 - Inspect and clean outdoor coils, if necessary and note
any damage to coils or signs of leakage.
Indoor Unit (Air Handler or Furnace)
1 - Inspect component wiring for loose, worn or damaged
connections. Confirm proper voltage plus amperage
indoor unit.
2 - Inspect and clean or replace air filters in indoor unit.
3 - Check the cleanliness of indoor blower and clean
blower, if necessary.
4 - Inspect the evaporator coil (Indoor) drain pans and
condensate drains for rust, debris, obstructions, leaks
or cracks. Pour water in pans to confirm proper
drainage from the pan through to the outlet of the pipe.
Clean or replace as necessary.
5 - Inspect and clean evaporator (indoor) coil, if
necessary.
6 - Inspect the condition of the refrigerant lines and
confirm that pipes are not rubbing copper-to-copper.
Also, ensure that refrigerant pipes are not being
affected by indoor air contamination. Check condition
of insulation on the refrigerant lines. Repair, correct, or
replace as necessary.
7 - Inspect the duct system for leaks or other problems.
HVAC
Repair or replace as necessary.
8 - Check for bearing/bushing wear on indoor blower
motor. Replace as necessary.
9 - Indoor unit inspections of gas- or oil-fired furnaces will
also include inspection and cleaning of the burners,
and a full inspection of the gas valve, heat exchanger
and flue (exhaust) system.
General System Test with System Operating
1 - Your technician should perform a general system test.
He will turn on the air conditioner to check operating
functions such as the start­up and shut­off operation.
He will also check for unusual noises or odors, and
measure indoor/outdoor temperatures and system
pressures as needed. He will check the refrigerant
charge per the charging sticker information on the
outdoor unit.
2 - Verify that system total static pressure and airflow
settings are within specific operating parameters.
3 - Verify correct temperature drop across indoor coil.
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14ACX SERIES