York Screw Chiller YCIV0187PA46

Warning: This procedure requires trained personnel with PPE!

All system valves including manual valves and EEVs are 100% open

All valves to the atmosphere are closed with flare caps in place

Enter the unit's initial evacuation level

Enter the system pressure after charging with dry nitrogen

Soap and water solution prepared

Soap solution test performed on each unit fitting joint and weld seams

This procedure must be performed at the specified time 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.

Sign off on the 1 Yearly Chiller Maintenance

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

This procedure must be performed at the specified time 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

Check superheat on the evaporator and the economizer feed to the compressor

Warning: This procedure should only be performed by a qualified technician.

Has the system been carefully pressure tested and evacuated at the factory?

Enter the leak rate (acceptable limit is 0.1 oz/year at DWP)

Are all joints tight and leak-free?

If any leaks are indicated, they must be repaired immediately.

Can leaks be stopped by ensuring that face seal nuts and flange bolts are correctly torqued?

For any major repair, the refrigerant charge must be removed and the system leak checked using reliable methods like a pressure test.