York YPHYB User Manual

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

The intervals at which filters require replacement

depend on local conditions.

Tele. 800-861-1001

www.York.com

P.O. Box 1592, York, Pennsylvania USA 17405-1592

Subject to change without notice. Printed in USA

Form 115.20-NOM2 (105)
Supercedes 115.20-NOM2 (904)

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.)

Clean or Replace Air Filters Regu-

larly