York Screw Chiller YCIV0177PA46

The following maintenance checks should be carried out on a daily basis by the operator/customer

The units are not generally user serviceable

No attempt should be made to rectify faults or problems found during daily checks unless competent and equipped to do so

If in any doubt, contact your local Johnson Controls Service Agent

Unit status: Press the STATUS key on the keypad and ensure no fault messages are displayed

Operating conditions: Read the operating pressures and temperatures at the control panel using the display keys

Check that these are within the operating limitations given in the manual

Compressor oil level: Check the compressor oil level after the compressor has been operating on FULL LOAD for approximately half an hour

Check oil level in the oil separator sight glass

Check liquid line sight glass / moisture indicator

Record system operating temperatures

Record system operating pressures

Check condenser coils for dirt/debris

Clean condenser coils if necessary

Sign off on the weekly chiller check

Warning: This procedure must be performed by an industry certified technician who has been trained and qualified to work on this type of equipment.

A record of this procedure being 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.

Sample compressor oil, check for acid, and replace if necessary

Disconnect power source and lock out and check tightness of power wiring connections

Check glycol concentration on low temperature or other applications where freezing may be a problem

Check programmable operating setpoints and safety cutouts and ensure they are correct for the application

Check compressor and evaporator heater operation

Check for dirt in the control panel

Check door gasket sealing integrity

This procedure must be performed by an industry certified technician

Maintain a record of this procedure for warranty purposes

Superheat on the economizer feed to the compressor