Comfort-Aire GDD95A Downflow Furnaces - Manual (Page 10)

10
MAINTENANCE ITEMS
FREQUENCY OF MAINTENANCE
BEGINNING OF EACH
HEATING SEASON
END OF EACH
HEATING SEASON
MONTHLY
Verify furnace area is free of combustible materials. X X X
Verify combustion and ventilation air is not restricted. X X X
Verify no signs of physical deterioration of the furnace. X X X
Verify no obstructions or restrictions in vent or chimney. X X
Verify no holes or cracks in vent pipe. X X
Verify no corrosion in vent pipe. X X
Verify the horizontal vent pipes slope upwards away from furnace. X X
Verify burner flame. X
Clean or replace filter(s). X
Clean blower compartment. X
Clean burner assembly. X
Clean condensate collection & disposal system (if applicable). X
Table 1. Maintenance Table
FURNACE & AIR DUCTS
• The furnace should be inspected annually by a licensed
HVAC technician. Table 1 below contains suggested
inspections and frequency of maintenance.
• Homeowners should perform frequent visual inspections
of the furnace for obvious signs of deterioration. The
furnace should be secure without sagging, cracks gaps,
etc around the base. The return air duct connection(s) is
secured and sealed to the furnace cabinet and terminates
outside the area containing the furnace. Any signs of
damage or loose connections should be repaired by a
qualified HVAC technician.
VENTING SYSTEM
• For proper and safe operation, this furnace requires
unrestricted airflow for combustion and ventilation.
Inspect for blocked or obstructed air openings on or
around the furnace, and the space around the furnace.
• The furnace venting system should be inspected annually
by a licensed HVAC technician. Vent pipe must slope
upwards and be physically secured without holes or
corrosion. Any corroded section of vent pipe must be
replaced, and any obstruction or blockage must be
removed by the technician.
• Flue passageways, the vent system, and the burners
should be inspected and cleaned (if required) by a
licensed HVAC technician annually to ensure continued
safe operation.
• Existing masonry chimneys should be inspected and
relined (if necessary) by a licensed HVAC technician.
BLOWER & FILTER
• It is recommended that the blower compartment be
cleaned of dirt or lint that may have accumulated in the
compartment or on the blower and motor as part of the
annual inspection.
• Keep air filters cleaned. It is recommended that the
furnace air filter be checked at least once a month.
Clean or replace filter to maintain proper airflow and
achieve maximum efficiency.
• Furniture and drapery should be arranged so that the
supply air registers and return grilles are not obstructed.
BURNER OPERATION
Perform the startup instructions on page 10. The igniter
should ignite the closest burner and the flames should
quickly carryover to the other burners. The flames should
be bright blue, with occasional yellow streaks.
NEW CONSTRUCTION
The operation of gas furnaces in a construction environment
can cause a variety of problems with the furnace. Before
occupying the residence, homeowners should have these
safety inspections performed by a licensed technician:
• Before occupancy, the furnace shall be inspected and
approved by applicable local authority even if this results
in redundant inspections.
• The duct work must be inspected and cleaned if found
to contain any construction debris.
• The filter must be replaced or cleaned and the furnace
must be inspected by a licensed HVAC technician. The
furnace must be cleaned and/or repaired if found to be
dirty, damaged, or malfunctioning in any way.
MAINTENANCE & INSPECTION