JOHNSON CONTROLS
170
SECTION 9 - MAINTENANCE
Form 201.28-NM1.1
Issue date: 08/06/2021
Procedure
Weekly
Quarterly
Semi-
annually
Annually
Every 5
years
Every *
hours
Check Oil Level in Oil Separator Sight
Glass.
X
Check Liquid Line Sight Glass/ Moisture
Indicator.
X
Check refrigerant level in the Evaporator
Sight Glass while running full load for 10
to 15 minutes.
X
Record System Operating Temperatures
& Pressures.
X
Check Condenser Coils for dirt / debris
and clean as necessary.
X
Check Programmable Operating
Setpoints and Safety Cutouts. Ensure
they are correct for the application.
X
Check Compressor and Evaporator
Heater operation.
X***
X
Check Suction Isolation Valve operation if
equipped.
X
Check for dirt in the Panel. Check Door
Gasket sealing integrity.
X
**Leak check the Chiller.
X
**Sample Compressor Oil, check for Acid,
and replace if necessary.
X
**Disconnect Power Source and Lock
Out. Check tightness of Power Wiring
connections.
X
Check Glycol concentration on Low Temp.
or other applications where freezing may
be a problem.
X
VSD Glycol Change.
X
* Reserved for customer use for any special site requirements.
** This procedure must be performed at the specific time by an industry certified technician who has been
trained and qualified to work on this type of equipment. A record of this procedure be successfully carried out should be maintained on file by the
equipment owner should proof of adequate maintenance be required at a later date for warranty purposes.
*** Chiller controller cannot detect the failure of heaters, compressor and evaporator heater need to weekly check and maintain to be normal in
subfreezing region in winter. Weekly maintenance to heaters and with the chilled water pump controlled by unit controller is recommended and man-
datory.
Maintenance requirements for YVAA
chillers
