Trane Series R™ Helical Rotary Chiller RTWD200PREM

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.

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

Ensure the cleaning solution is suitable for copper, cast iron, and steel.

Materials used in the external circulation system

Duration of the cleaning period

Ensure all safety precautions are followed.

Was the chemical cleaning successful?

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.

Sign off on the monthly maintenance