York YCAS Installation Operation & Maintenance page 209

MAINTENANCE REQUIREMENTS FOR YORK YCAS SCREW CHILLERS
PROCEDURE
Check oil level in oil separator sight glass
Check liquid line sight glass / moisture indicator
Record system operating pressures and temperatures
Check programmable operating setpoints and safety cutouts
and assure they are correct for particular application.
Check condenser coils for dirt/debris and clean if necessary
Check compressor superheat on evaporator and economizer
TXV's; Check condenser and economizer subcooling
Check compressor and evaporator heaters for operation
Sample compressor oil and replace oil if necessary
Leak check the chiller
1
Disconnect power source and lock out; Check tightness of
power wiring connections 1
* Reserved for customer use for any special site determined requirements.
This procedure must be performed at the speciÞ ed time interval by an Industry CertiÞ ed Technician who has been trained and qualiÞ ed to work on this type of YORK
1
equipment. A record of this procedure being successfully carried out must be maintained on Þ le by the equipment owner should proof of adequate maintenance
be required at a later date for warranty validation purposes.
WEEKLY
X
X
X
X
1
1
QUARTERLY SEMI-ANNUALLY
X
X
X
EVERY
YEAR LY
___ HOURS
*
X
X
X