Carrier 48HJ004-014 - Manual (Page 7)

7
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might be
willing to perform, your unit should be inspected regularly by a
properly trained and qualified Carrier service technician. An
inspection (preferably each heating/cooling season, but at least
every year) should include the following:
1. Inspection of all flue product passages — including the
burners, heat exchanger, and flue collector box.
2. Inspection of all combustion- and ventilation-air passages
and openings.
3. Close inspection of all gas pipes leading to and inside
your unit.
4. Inspection and if required, cleaning of the condenser and
evaporator coils.
5. Inspection, and if required, cleaning of the condensate
drain pan.
6. Inspection and cleaning of blower wheel housing and
motor.
7. Inspection of all supply- and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems
found should be resolved at the time of inspection.
8. Inspection of the unit base for cracks, gaps, etc., which
may cause a hazardous condition.
9. Inspection of the unit casing for signs of deterioration.
10. Inspection of all electrical wiring and components to
ensure proper connection.
11. Inspection for leaks in the refrigerant circuit. Pressure-
check to determine appropriate refrigerant charge
12. Inspection of fan wheels and housings, belt tension, and
fan motor shaft bearings.
13. Operational check of the unit to determine working con-
ditions. Repair or adjustment should be made at the time
of inspection.
Your servicing dealer may offer an economical service
contract that covers seasonal inspections. Ask for further
details.
Complete service instructions can be found in the unit
Installation, Start-Up and Service Instructions.
Fig. 5 — Typical Heat Section Detail