Trane Series R™ Helical Rotary Chiller RTAC140H

Perform all weekly maintenance procedures

While unit is running in stable conditions.

Check MP pressure for evaporator, condenser and intermediate oil.

Observe liquid line sight glass on EXV.

If liquid line sight glass has bubbles measure the subcooling entering the EXV. The subcooling should never be less than 4 °F under any circumstances.

A clear sightglass alone does not mean that the system is properly charged. Also check the rest of the system operating conditions.

Inspect the entire system for unusual conditions and inspect the condenser coils for dirt and debris. If the coils are dirty, refer to coil cleaning.

Sign off on the weekly maintenance

1. Perform all weekly and monthly procedures.

2. Check oil sump oil level while unit is off.

NOTE: Routine changing of the oil is not required. Use an oil analysis to determine the condition of the oil.

3. Have a qualified laboratory perform a compressor oil analysis to determine sys-tem moisture content and acid level. This analysis is a valuable diagnostic tool.

4. Contact a qualified service organization to leak test the chiller, to check operating and safety controls, and to inspect electrical components for deficiencies.

5. Inspect all piping components for leakage and damage. Clean out any inline strainers.

6. Clean and repaint any areas that show signs of corrosion.

This procedure should be followed when adding charge to an undercharged unit. When low charge is indicated by low subcooling in the liquid line, charge should be added until sufficient subcooling is achieved.

1. Attach charging hose to evaporator service valve (3/8” (9mm) flare). Open service valve.

2. Add 10 pounds of refrigerant (R-134a) charge.

3. Close valve, remove charging hose and start unit. Monitor subcooling.

4. If subcooling is still insufficient, return to step #1.

NOTE: Proper subcooling can be determined from run log history, service experience, or by contacting Trane technical service.;

Ensure enough space around the outdoor unit for unrestricted access to all service points.

Enter the distance in feet around the outdoor unit

Is there sufficient clearance for the opening of control panel doors?

Ensure unobstructed flow of condenser air to maintain chiller capacity and operating efficiency.

Is there sufficient flow of air across the condenser heat transfer surface?

Avoid warm air recirculation and coil starvation.

Is there any warm air recirculation?

Ensure no debris, trash, supplies etc. accumulate in the vicinity of the unit.