Trane Series R™ Helical Rotary Chiller RTWD90STD

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

New o-rings or gaskets used 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

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.

Review mechanical room limitations and determine the safest method or methods of rigging and lifting the waterboxes.

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 approved by the company?

Note: Chemical tube cleaning should always be followed by mechanical tube cleaning.

Sign off on the chemical cleaning

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: Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Verify that no power is present with a voltmeter.

Shut down the chiller once each year to check the following:

Sign off on the yearly maintenance