Trane Series R™ Helical Rotary Chiller RTAC170H

Perform all weekly maintenance procedures

Warning: Ensure you are wearing appropriate PPE before starting the procedure.

Secure the isolators to the mounting surface using the mounting slots in the isolator base plate.

Align the mounting holes in the base of the unit with the threaded positioning pins on the top of the isolators.

Lower the unit onto the isolators and secure the isolator to the unit with a nut.

Enter the isolator deflection (should be 1/4 inch or 6 mm)

Fully tighten the isolator mounting bolts.

Sign off on the isolator replacement

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

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

Enter the unit dimensions as per submittal drawings

Enter the minimum clearance for compressor service (Recommended: 4 feet or 1.2 m)

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?

Is there any warm air recirculation or coil starvation?

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

Is the condenser coil free of debris?

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.;