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
Copyright © by York International Corporation 2004
ALL RIGHTS RESERVED
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
