Compressor; Electrical Controls - York YD A Operating & Maintenance

Centrifugal liquid chillers with optiview control center and electro-mechanical starter cooling only
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FORM 160.69-O2
ISSUE DATE: 9/30/2020

COMPRESSOR

Maintenance for the compressor assembly consists of
checking the operation of the oil return system and
changing the dehydrator, checking and changing the
oil, checking and changing the oil filters, checking the
operation of the oil heater, checking the operation of
the oil pump, and observing the operation of the com-
pressor.
Internal wearing of compressor parts could be a seri-
ous problem caused by improper lubrication, brought
about by restricted oil lines, passages, or dirty oil fil-
ters. If the unit is shutting down on (HOT) High Oil
Temperature or Low Oil Pressure (OP), change the oil
filter element. Examine the oil filter element for the
JOHNSON CONTROLS
presence of aluminum particles. Aluminum gas seal
rings can contact the impeller and account for some
aluminum particles to accumulate in the oil filter, espe-
cially during the initial start up and first several months
of operation. However, if aluminum particles continue
to accumulate and the same conditions continue to stop
the unit operation after a new filter is installed, notify
the nearest YORK office to request the presence of a
YORK Service Technician.

ELECTRICAL CONTROLS

For information covering the OptiView™ Control
Center operation, refer to Form 160.69-O1.
SECTION 6 – MAINTENANCE
47
6

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