Trane Series R™ Helical Rotary Chiller RTAC185S

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.

Proper oil and refrigerant charge is essential for proper unit operation, unit perfor-mance, and environmental protection. Only trained and licensed service personnal should service the chiller.

Some symptoms of a refrigerant under-charged unit:

• Higher than normal discharge superheat

• Larger than normal evaporator approach temperatures (leaving water temperature - saturated evaporator temperature)

• Low evaporator refrigerant temperature limit

• Low refrigerant temperature cutout diagnostic

Perform all weekly maintenance procedures

Isolate the refrigerant charge outside of the compressor and close all four valves leading to the compressor?

Disconnect power to the chiller. Remove the electrical junction box cover and disconnect the wires?

WARNING: Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

Evacuate the compressor through the service fitting provided. If the unit does not have suction service valves, this will include evacuating the low side of the system as well. Disconnect all four lines attached to the compressor, as well as the junction box. Remove three screws from the bottom of the compressor?

Remove the compressor by sliding it out of the chiller onto a well supported skid or other platform. The compressor is very heavy, so insure that the support is sturdy. A piece of 1x4 lumber placed between the isolators works well to support the compressor feet as it is pulled from the chiller?

Install the new compressor. Reinstall all lines, wires, and screws. Open the service valves, and trim charge as required?

Sign off on the compressor replacement

Attach vacuum hoses to evaporator service valves (one per circuit)

Attach charging hoses to the charging port on the liquid line filter (one per circuit)

Filters contain a port with a ¼” (6mm) flare

Begin semi-automatic vacuum procedure

Manually isolate the unit from vacuum

Charge unit through the filter housing port per Table 1 - Table 4