York FAN COIL YWC - Manual (Page 12)

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.
If motor service is required, it can be removed in the
following manner:
1. Disconnect electrical power to
the unit at the discon-
nect switch and lock out.
2. Remove two screws, securing blower deck to unit.
3. Locate motor lead wires where they connect to the
side panel, (lower rear on the electrical box side).
4. The quick connect plug needs to be squeezed on top
and bottom to release it from its socket (dual motor
units have two plugs).
5. Now slide blower / motor deck out of unit to ser-
vice.
6. Reverse process to install.
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 cleaning
every six to eight weeks.
The filter is a permanent type and may be removed and
washed with a garden hose. Filter should be completely
dry before reinstalling. To remove the filter, rotate the
retaining rod holding the front edge of the filter so it
can drop below the front panel of the cabinet, then pull
outward to remove. To reinstall the filter, slide the filter
into the filter channels on both sides of the unit. Rotate
filter retaining rod on lower front edge of cabinet door
so that it is under the filter, then push the rod upward
into the cabinet door.
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 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
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.)
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 Johnson Controls 2006 ALL RIGHTS RESERVED
Form 115.20-NOM3 (1006)
Supersedes: Form 115.20-NOM3 (105)