Trane Series R™ Helical Rotary Chiller RTHCB2C2D2

CAUTION: To prevent oil sump heater burnout, open the unit main power disconnect switch before removing oil from the compressor.

Trane polyolester oil is the approved oil for the RTHC units. Polyolester oil is extremely hygroscopic meaning it readily attracts moisture. The oil can not be stored in plastic containers due to the hygroscopic properties. As with mineral oil, if water is in the system it will react with the oil to form acids.

Use Table 28 to determine the acceptability of the oil. The proper charge amounts are given in Table 29 .

Note: Use an oil transfer pump to change the oil regardless of chiller pressure.

Did you open the unit main power disconnect switch before removing oil from the compressor?

Did you use Trane polyolester oil for the RTHC units?

Did you store the oil in a non-plastic container?

Did you check the acceptability of the oil using Table 28?

Did you use the proper charge amounts as given in Table 29?

Warning: Disconnect ALL power before/during evacuation.

Cause of lost refrigerant determined and problem repaired

Vacuum pump connected to the 5/8” flare connection on the bottom of the evaporator and/or condenser

System pulled down below 500 microns

Standing rise test performed for at least an hour

Pressure rise during standing rise test

NOTE: If oil is in the system, this test is more difficult. The oil is aromatic and will give off vapors that will rise the pressure of the system.

Sign off on the refrigerant charge procedure

Warning: This procedure requires trained personnel with PPE!

Chiller shut down on a 'Low Oil Flow' diagnostic?

Compressor shut down on a 'Loss of Oil at Compressor (Running)' diagnostic?

Pressure drop between the two service valves in the lubrication circuit

If pressure drop exceeds the maximum level, proceed with the following steps

Isolate the oil filter by closing the two ball valves located before and after the filter

Relieve the pressure from the hydraulic line through the 1/4” schrader valve located between the ball valve and the oil filter (or the ball valve and oil cooler, if so equipped)

Use a rubber mallet to break loose the nut that secures the oil filter element to the filter manifold

Turn the nut clockwise until the filter element detaches from the manifold

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

Condenser tube fouling is indicated when the “approach” 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.

Remove the retaining bolts from the water boxes at each end of the condenser.

Use a hoist to lift the water boxes.

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

Was a complete examination of the unit conducted?

Describe the condition of the compressor and internal components

Sign off on the 3 Yearly Series R™ Helical Rotary Chiller Maintenance