York YRHBC, YPHBC, YHYB, YPHYB, YHBC, YPHH, YHH Maintenance, Clean or Replace Air Filters Regu- larly

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 ad- visable for greasy surfaces).

3.Prior to the water system start-up and balancing, the chilled/hot water systems should be flushed to clean out dirt and debris, which may have accumulated during construction. All unit service valves are to be closed during this process. Strainers are to be installed in the piping mains to prevent this material from entering the units during normal operation.

FILTERS

Clean or Replace Air Filters Regu- larly

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.

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.

Dirty filters reduce the air and heat- ing capacities of the Unit Ventilator. When the filters are excessively dirty, the unit heating capacity will be so re- duced that it is ineffective 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 thoroughly. 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.)

P.O. Box 1592, York, Pennsylvania USA 17405-1592	Tele. 800-861-1001	Subject to change without notice. Printed in USA
Copyright © by York International Corporation 2004	www.York.com	ALL RIGHTS RESERVED
Form 115.20-NOM2 (105)
Supercedes 115.20-NOM2 (904)