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FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
It is the responsibility of the equipment owner to per-
form maintenance on the system.
Important
If system failure occurs due to improper maintenance
during the warranty period, Johnson Controls will not
be liable for costs incurred to return the system to sat-
isfactory operation. The following is intended only as
a guide and covers only the chiller unit components. It
does not cover other related system components which
may or may not be furnished by Johnson Controls.
System components should be maintained according to
the individual manufacture's recommendations as their
operation will affect the operation of the chiller.
COMPRESSORS
Oil Level check
The oil level can only be tested when the compressor is
running in stabilized conditions, to ensure that there is
no liquid refrigerant in the lower shell of the compres-
sor. When the compressor is running at stabilized con-
ditions, the oil level must be between 1/4 and 3/4 in the
oil sight glass. At shutdown, it is acceptable if the oil
level falls to the bottom limit of the oil sight glass.
Use YORK "V" oil 011-00949-000, when
adding oil to Copeland compressor. The
Bitzer compressor uses 011-00982-000 oil.
Oil Analysis
The oil used in these compressors is pale yellow in
color (POE oil). If the oil color darkens or exhibits a
change in color, this may be an indication of contami-
nants in the refrigerant system. If this occurs, an oil
sample should be taken and analyzed. If contaminants
are present, the system must be cleaned to prevent
compressor failure.
Never use the scroll compressor to pump
the refrigerant system down into a vacu-
um. Doing so will cause internal arcing
of the compressor motor which will result
in failure of compressor.
JOHNSON CONTROLS
SECTION 10 – MAINTENANCE
CONDENSER FAN MOTORS
Condenser fan motors are permanently lubricated and
require no maintenance.
Condenser MCHX
Dirt should not be allowed to accumulate on the
MCHX condenser surfaces. Cleaning should be as
often as necessary to keep coils clean.
CONDENSER MCHX CLEANING
The cleaning procedure for the condenser MCHX is
significantly different than tube and fin type MCHX.
Care must be taken to understand the differences to
avoid damage to the MCHX. These differences require
a number of DO NOT's that must be observed:
Follow the three steps below for cleaning the MCHX:
Exercise care when cleaning the MCHX
so that the fins are not damaged.
• DO NOT use coil cleaners or any chemical on
a MCHX. This can cause severe damage to the
coils.
• DO NOT use a pressure washer to clean the
MCHX. While it is possible to clean a the MCHX
with a pressure washer, it's also possible to de-
stroy it.
• DO NOT contact the MCHX with a hard surface
such as a hose nozzle or metal vacuum nozzle or
any other tool.
1. Remove surface debris such as dirt, leaves, insects,
fibers, etc. with a vacuum cleaner having a soft at-
tachment rather than a metal tube. Compressed air
blown from the inside out can also be used. When
brushing debris off the face of the MCHX a soft
bristle (not wire) brush can be used. Do not scrape
the MCHX with the vacuum nozzle, air nozzle, or
any other tool.
10
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