Table of Contents
Advertisement
Filters
To prevent property damage due to fire and loss of
equipment efficiency or equipment damage due to dust and
lint build up on internal parts, never operate unit without an
air filter installed in the return air system.
Every application may require a different frequency of
replacement of dirty filters. Filters must be replaced at least
every three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate
heating or cooling performance. Filter inspection should be
made at least every two months; more often if necessary
because of local conditions and usage.
Dirty throwaway filters should be discarded and replaced
with a new, clean filter.
An internal filter rack is factory installed in the return section
of this unit (filters are not included). To remove the filters,
remove the filter access panel on return side of the unit.
NOTE: Does not apply to AA revision.
Cabinet Finish Maintenance
Use a fine grade automotive wax on the cabinet finish to
maintain the finish's original high luster. This is especially
important in installations with extended periods of direct
sunlight.
Clean Outside Coil (Qualified Servicer Only)
The coil with the outside air flowing over it should be
inspected annually and cleaned as frequently as necessary
to keep the finned areas free of lint, hair and debris.
Condenser And Induced Draft Motors
Bearings on the condenser fan motors and the combustion
fan motor are permanently lubricated. No additional oiling
is required.
Flame Sensor (Qualified Servicer Only)
A drop in the flame current can be caused by a nearly
invisible coating on the flame sensor. This coating, created
by the fuel or combustion air supply, can be removed by
carefully cleaning the flame sensor with steel wool.
CAUTION
NOTE: After cleaning, the microamp signal should
be stable and in the range of 4 - 6 microamps DC.
Flue Passages (Qualified Servicer Only)
At the start of each heating season, inspect and, if
necessary, clean the unit flue passage.
Lubrication
The fan shaft bearings, the supply fan motors, the
condenser fan motors and compressors are permanently
lubricated.
Inspection & Cleaning
All flue product carrying areas of the furnace, its vent
system, and main burners should be examined by a
qualified service agency, and cleaned if necessary, before
the start of each heating season. This examination is
necessary for continued safe operation. Particular attention
should be given to deterioration from corrosion or other
sources. This examination is accomplished in the following
manner.
1. Disconnect power to the unit and remove furnace
section access panel.
2. Remove burner assembly:
a. Disconnect the wires from the gas valve after
noting which wires are connected to each
terminal.
b. Disconnect wires from the flame rod and ignition
electrode.
c. Disconnect the gas piping at the union.
d. The entire burner assembly can now be
removed from the unit.
NOTE: Use all screws that were removed; they are
necessary for safe and proper operation of the
unit.
3. Inspect and periodically clean the vent outlet (bird
screen) on the access panel.
NOTE: Periodic observation of the flame and a
log of C0
measurements are recommended. This
2
will aid in determining whether the furnace is
operating efficiently or if the furnace requires
cleaning.
Flames should be stable, soft and blue (dust may cause
orange tips but must not be yellow). The flames must
extend directly outward from the burner without curling,
floating or lifting off.
22
Advertisement
Table of Contents
