GM9S96 Service Manual
SCHEDULED MAINTENANCE
27
WARNING
-
inadequate heating or cooling performance. Filters should
be cleaned (permanent) or replaced (disposable) every two
months or as required. It is the owner’s responsibility to keep
can be applied. Filters can be installed in the central re-
Product Design section of this
manual or the product Specication Sheet must be followed
to ensure proper unit performance. Refer to the following
Follow the manufacturer’s directions for service.
Filters in horizontal installations are located in the central
return register.
The bearings in the induced draft blower and circulator blow-
er motors are permanently lubricated by the manufacturer.
No further lubrication is required. Check motor windings for
accumulation of dust which may cause overheating. Clean
as necessary.
must be checked annually and cleaned as often as neces-
sary to ensure proper condensate drainage.
Under some conditions, the fuel or air supply can create a
WARNING
-
-
Periodically during the heating season make a visual check of
a few minutes since any dislodged dust will alter the normal
blue with slightly orange tips. They should not be yellow. They
should extend directly outward from the burner ports without
Proper test equipment for accurate diagnosis is as essential
as regular hand tools.
The following is a must for every service technician and ser-
vice shop.
1. Thermometers or thermocouple meter (optional) - To
measure temperatures.
2. Multi-Meter - To measure amperage and voltage, and
to test continuity, capacitors and motor windings.
3. Manometer - To measure static pressure, pressure
-
let and manifold gas pressures.
Other recording type instruments can be essential in solving
abnormal problems, however, in many instances they may
be rented from local sources.