Trane Series R™ Helical Rotary Chiller RTAC120H

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.;

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.

Specific connection and schematic wiring diagrams are shipped with the unit. Some piping and control schemes, particularly those using a single water pump for both chilled and hot water, must be analyzed to determine how and or if a flow sensing device will provide desired operation.

Follow the manufacturer’s recommendations for selection and installation procedures. General guidelines for flow switch installation are outlined below.

1. Mount the switch upright, with a minimum of 5 pipe diameters of straight hori-zontal run on each side. Do not install close to elbows, orifices or valves.

NOTE: The arrow on the switch must point in the direction of flow.

2. To prevent switch fluttering, remove all air from the water system.

NOTE: The CH530 provides a 6-second time delay after a “loss-of-flow” diagnostic before shutting the unit down. Contact a qualified service representative if nuisance machine shutdowns persist.

3. Adjust the switch to open when water flow falls below the minimum flow rate. Evaporator data is given in the General Information section. Flow switch contacts are closed on proof of water flow.

4. Install a pipe strainer in the entering evaporator water line to protect components from waterborne debris.;

Warning: This procedure requires trained personnel with PPE!

Temperature downstream of the filter is 8°F (4.4°C) lower than the upstream temperature?

Liquid line isolation valve is closed?

Ball valve on oil cooler liquid line is closed?

Upload a photo of the attached hose to service port on liquid line filter flange.

Refrigerant from liquid line evacuated and stored?

Inspect the individual pieces of the shipment for obvious damage

Inspect the unit for concealed damage

Date of concealed damage report

Evidence that the damage did not occur after delivery

Carrier’s terminal notified of the damage

Trane sales representative notified and repair arranged

Do not repair the unit until damage is inspected by the carrier’s representative.

Sign off on the inspection checklist