York LD11556, LD11554, LD11555 warranty Maintenance, Clean or replace air filters regularly

FORM 115.20-NOM6 (1106)

MAINTENANCE

MOTOR

The blower motor should be cleaned annually and if it has oiling ports, it should be oiled with a good grade of SAE 20 oil. Normally a few drops of oil in each bearing is sufficient.

COIL

The coil must be kept clean by any of the following methods.

1.Cleaning with low-pressure compressed air.

2.Flushing or rinsing with water (a detergent is advisable for greasy surfaces).

To ensure proper maintenance of the filters, it is best to follow an organized maintenance procedure. The following one is recommended:

Divide the total number of units on the job into six equal groups. Each week inspect, clean or replace the filters in each group, in rotation. This insures a uniform servicing interval. The interval may be lengthened or shortened as determined by experience. If inspection shows only the room-air filter to be dirty, this one alone should be replaced.

FILTERS

Clean or replace air filters regularly

The intervals at which filters require replacement depend on local conditions.

Because of dust and lint in the room, room-air filters load up much more rapidly than outdoor-air filters. Under normal conditions, the room air filter requires replacement every six to eight weeks.

Dirty filters reduce the air and heating capacities of the unit. When the filters are excessively dirty, the unit heating capacity will be so reduced that it is in- effective for heating the room. When a room fails to heat, always check the filters.

CLEAN UNIT INTERIOR

Once a year clean the fans and coils of the unit thor- oughly. Remove the access panel as necessary.

Wipe the interior of the unit clean with a rag. Wipe the motor and inside and outside of the fan housings. (In cooling units, clean out the drain pan.)

10 JOHNSON CONTROLS