Trane Series R™ Helical Rotary Chiller RTWD250HIGH

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?

Describe any issues found during the tube test

Sign off on the 3-year maintenance check

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

Warning: This procedure requires trained personnel with PPE!

Name of the water treatment specialist consulted

Materials used in the external circulation system

Duration of the cleaning period

Safety precautions to be followed

Was the chemical cleaning followed by mechanical tube cleaning?

Sign off on the chemical cleaning

CAUTION: Do not use untreated or improperly treated water, or equipment damage may occur.

Condenser tube fouling is indicated when the “approach” temperature (i.e., the difference between the refrigerant condensing temperature and the leaving condenser water temperature) is higher than predicted.

Standard water applications will operate with less than a 10°F approach. If the approach exceeds 10°F cleaning the condenser tubes is recommended.

NOTE: Glycol in the water system typically doubles the standard approach.

If the annual condenser tube inspection indicates that the tubes are fouled, 2 cleaning methods can be used to rid the tubes of contaminants.

Mechanical tube cleaning- this method is used to remove sludge and loose material from smoothbore condenser tubes.

WARNING: Heavy Objects! Failure to properly lift waterbox could result in death or serious injury.

WARNING: Straight Vertical Lift Required! Failure to properly lift waterbox in straight vertical lift could cause the eyebolts to break which could result in death or serious injury from object dropping.

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

Measure and log the subcooling and superheat

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.

Sign off on the monthly maintenance