MAINTENANCE
NORMAL MAINTENANCE
Prior to any of the following maintenance proce- dures, shut off all electric power to the unit to pre- vent personal injury.
Periodic maintenance normally consists of changing or clean- ing filters and (under some conditions) cleaning the main burners
FILTERS
Inspect once a month. Replace disposable or clean perma- nent type as necessary. DO NOT replace permanent type with disposable. The dimensional size of the replacement fil- ter must be the same as the replaced filter.
MOTORS
Outdoor fan motors are permanently lubricated and require no maintenance.
Ventor motor is factory lubricated for an estimated 10 year life.
Indoor Blower Motor and Drive - The indoor blower motor fea- tures ball bearings that do not require periodic lubrication. Periodic lubrication of the motor and bearings can extend the
life of components but is optional.
Damage can occur if the bearings are overlubri- cated. Use grease sparingly.
Perform all maintenance operations on the blower motor with electric power disconnected from the unit. Do not attempt to lubricate bearings with the unit in operation.
On an annual basis, check the motor for accumulations of dust, etc. that may block the cooling slots in the motor shell. Check for loose, damaged or misaligned drive components. Check that all mounting bolts are tight. Replace defective parts as required.
If desired, every three years remove both pipe plugs at each end shell and clean out any hardened grease or foreign mat- ter. Replace one plug on each end with a clean grease fitting. Using a low pressure grease gun, pump grease (Chevron
On 20 ton only, units are supplied with blower shaft bearings that do not require maintenance but may be relubricated if desired. Every three years, using a low pressure grease gun, pump grease into the bearing grease fitting until grease just begins to show at the seals. Do not over lubricate. Use any lithium base grease recommended for ball bearing service.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the outdoor coil surface or other parts in the air circuit. Cleaning should be as often as necessary to keep coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean coil, be sure electric power to the unit is shut off prior to cleaning.
NOTE: Exercise care when cleaning the coil so that the coil fins are not damaged.
NOTE: Do not permit the hot condenser air discharge to be obstructed by overhanging structures of shrubs.
BURNER & PILOT
Periodically (at least annually at the beginning of each heat- ing season) make a visual check of the pilot and main burner flame. If necessary, adjust main burner primary air shutters to give a distinct, sharp blue flame as explained under BURNER AIR SHUTTER ADJUSTMENT. If it is not possible to adjust for the proper flame, the burners may need cleaning.
TO CLEAN BURNERS
Remove them from the furnace as explained in Burner Instructions. Clean burners with hot water applied along top of the burner.
COMBUSTION AIR DISCHARGE
Visually inspect discharge outlet periodically to make sure that the buildup of soot and dirt is not excessive. If necessary, clean to maintain adequate combustion air discharge.
CLEANING FLUE PASSAGES AND HEATING ELE- MENTS
With proper combustion adjustment the heating element of a gas fired furnace will seldom need cleaning. If the element should become sooted, it can be cleaned as follows:
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