Trane CenTraVac™ Water-Cooled Chiller CVHG - 670-780 - 621 - 142L / 142L

Is the evaporator part of a closed circuit?

If the evaporator is part of a closed circuit, it may not accumulate appreciable amounts of scale or sludge.

Has the evaporator been cleaned in the last three years?

Normally, cleaning every three years is sufficient.

Is the evaporator part of an open system, such as air washers?

However, periodic inspection and cleaning is recommended on open evaporator systems, such as air washers.

Sign off on the evaporator maintenance

Operate the tang operators manually and check for any abnormalities

Drain contents of the rupture disk and purge discharge vent-line drip-leg into an evacuated waste container

Do this more often if the purge is operated excessively

Apply oil to any exposed metal parts to prevent rust

- Shut down the chiller once each year to check the items of Oil System

1. Perform Annual oil analysis (follow recommendations)

2. Clean and lubricate oil system as required

5. Run oil pump and check differential oil pressure;

NOTICE: Equipment Damage! Mixing refrigerants or oils could result in equipment damage including bearing damage, introduction of acids into the chiller, or continuous purge pump-out in high-head/high ambient applications.

CenTraVac chillers are manufactured with different refrigerant/oil systems: 1) chillers using R-123 refrigerant and OIL00022 compressor oil, and 2) chillers using R-514A refrigerant and OIL00334/OIL00335 compressor oil.

Verify proper refrigerant and oil for your chiller and do NOT mix refrigerants or oils!

Important: Verify proper refrigerant and compressor oil for your chiller before proceeding!

After the first six months of accumulated operation or after 1000 hours operation—whichever comes first—it is recommended to change the oil and filter.

After this oil change, it is recommended to subscribe to the Trane annual oil analysis program rather than automatically change the oil as part of scheduled maintenance.

Change the oil only if indicated by the oil analysis. Using an oil analysis program will reduce the chiller’s overall lifetime waste oil generation and minimize refrigerant emissions.

The analysis determines system moisture content, acid level, and wear metal content of the oil, and can be used as a diagnostic tool. The oil analysis should be performed by a qualified laboratory that is experienced in refrigerant and oil chemistry and in the servicing of Trane® centrifugal chillers.

In conjunction with other diagnostics performed by a qualified service technician, oil analyses can provide valuable information on the performance of the chiller to help minimize operating and maintenance costs and maximize its operating life.

Shut down the chiller once each year to check the items of Starter or Adaptive FrequencyTM Drive

Check all connections per manufacturer specifications

Follow all manufacturer recommendations for starter or Adaptive FrequencyTM Drive (AFD) maintenance

Inspect/clean/service the AFD cooling system (water- or air-cooled AFD)

Record all applicable starter or starter component settings

Sign off on the yearly inspection