MAINTENANCE
NORMAL MAINTENANCE
Prior to any of the following maintenance pro- cedures, shut off all electric power to the unit to prevent personal injury.
FILTERS
Inspect once a month. Replace disposable or clean permanent type as necessary. DO NOT replace per- manent type with disposable. The dimensional size of the replacement filter must be the same as the replaced filter.
MOTORS
Outdoor fan motors are permanently lubricated and require no maintenance.
Indoor Blower Motor and Drive - The indoor blower motor features 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 overlu- bricated. Use grease sparingly.
Perform all maintenance operations on the blower motor with electric power disconnected from the unit. Do not attempt to lubricate bear- ings 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 matter. Replace one plug on each end with a clean grease fitting. Using a low pressure grease gun, pump grease (Chevron
15 ton units are supplied with blower shaft bearings that do not require maintenance but may be lubricated if desired. Every three years, using a low pressure grease gun, pump grease into the bearing grease fit- ting until grease just begins to show at the seals. Do not over lubricate. Use any lithium base grease recom- mended for ball bearing service.
OUTDOOR COIL
Dirt should not be allowed to accumulate on the out- door coil surface or other parts in the air circuit. Clean- ing should be as often as necessary to keep coil clean. Use a brush, vacuum cleaner attachment, or other suit- able means. If water is used to clean coil, be sure elec- tric 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.
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