Trane Series R™ Helical Rotary Chiller RTWD180PREM

Warning: This maintenance check requires trained personnel with PPE!

Use a nondestructive tube test to inspect the condenser and evaporator tubes at 3-year intervals.

NOTE: It may be desirable to perform tube tests on these components at more frequent intervals, depending upon chiller application. This is especially true of critical process equipment.

Depending on chiller duty, contact a qualified service organization to determine when to conduct a complete examination of the unit to determine the condition of the compressor and internal components.

Nondestructive tube test passed?

Sign off on the chiller maintenance

After the unit has operated for approximately 30 minutes and the system has stabilized, check the operating conditions and complete the procedures below:

Check evaporator and condenser pressures with gauges and compare to the reading on the unit chiller.

Pressure readings should fall within the specified ranges listed in Table 23, p. 65 and Table 24, p. 65. If chiller measurements vary significantly from values listed, problems may exist with refrigerant and oil charge levels. Contact local Trane service.

Note: Optimal condenser pressure is dependent on condenser water temperature, and should equal the saturation pressure of the refrigerant at a temperature 2 to 5°F above that of leaving condenser water at full load.

Sign off on the weekly maintenance check.

Warning: This procedure requires trained personnel with PPE!

Run the unit fully unloaded for approximately 20 minutes.

Attach a 3/8 inch or 1/2 inch hose with a sight glass in the middle to the oil sump service valve (1/4 inch flare) and the oil separator service valve (1/4 inch flare).

Note: Using high pressure rated clear hose with appropriate fittings can help speed up the process.

After the unit is off line for 30 minutes, move the sight glass along the side of the oil sump.

Enter the oil level from the bottom of the oil sump.

Note: If oil levels are not between 3 inch and 5 inch, contact Trane service.

After the level is determined, close the service valves and remove the hose/sight glass assembly.

Clean all water strainers in both the chilled and condensing water piping systems

See “Refrigerant and Oil Charge Management,” p. 65. If chiller measurements vary significantly from values listed in Table 23, p. 65 and Table 24, p. 65, problems may exist with refrigerant and oil charge levels.

Contact local Trane service if measurements vary significantly?

Once service is complete, the waterbox/ cover should be reinstalled following all previous procedures in reverse.

Use new o-rings or gaskets on all joints after thoroughly cleaning each joint.

Contact local Trane parts center for information.

Note: Torque bolts in a star pattern. See the table below for torque values.

Sign off on the chiller reassembly