Trane Series R™ Helical Rotary Chiller RTHCC1B2C1

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 use an oil transfer pump to change the oil?

Sign off on the compressor oil maintenance

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

Is the 'approach' temperature higher than predicted?

If the approach exceeds 10°F, cleaning the condenser tubes is recommended.

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

Use a hoist to lift the water boxes.

Work a round nylon- or brass- bristled brush (attached to a rod) in and out of each of the condenser water tubes to loosen the sludge.

Thoroughly flush the condenser water tubes with clean water.

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

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

WARNING: Hazardous Voltage! Disconnect all electrical power, including remote disconnects before servicing. Failure to disconnect power before servicing can cause severe personal injury or death.

Perform all weekly and monthly maintenance procedures.

Check the refrigerant charge and oil level.

Routine oil changing is not necessary on a hermetic system.

Have a qualified laboratory perform an oil analysis to determine system moisture content and acid level.

IMPORTANT: Due to the hygroscopic properties of the POE oil, all oil must be stored in metal containers. The oil will absorb water if stored in a plastic container.

Check the pressure drop across the oil filter.

Contact a qualified service organization to leak check the chiller, to inspect safety controls, and inspect electrical components for deficiencies.

Inspect all piping components for leakage and damage. Clean out any inline strainers.