Trane Series R™ Helical Rotary Chiller RTHCB1B1B1

Warning: This procedure should be performed by trained personnel only.

Gas pump able to return oil to compressor?

If gas pump is unable to return oil, proceed with filter replacement.

Enter the pressure drop across the filter at full load conditions.

Is the pressure drop within the normal range?

If pressure drop is not within the normal range, replace the filter.

Is the evaporator logged with oil?

If evaporator is logged with oil, manually move the oil from the evaporator to the oil sump.

Sign off on the gas pump oil filter replacement.

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

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 Clear Language Display.

Pressure readings should fall within the following ranges specified in the Operating Conditions table:

NOTE: Optimum 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

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.

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