York YMB-HW 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

advisable for greasy surfaces).

FILTERS

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:

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-NOM4 (105)
New Release

Clean or Replace Air Filters Regu-

larly

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.

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.

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.)