Trane Series R™ Helical Rotary Chiller RTHCB1C1D1

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: This procedure should be performed by trained personnel only.

Check if the gas pump is returning the oil to the compressor.

Enter the liquid level reading from the sensor.

Enter the suction pressure reading.

Enter the evaporator approach reading.

Check if the pressure drop across the filter is above the normal range at full load conditions.

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

Upload a photo of the oil sump after moving the oil.

Sign off on the gas pump oil filter replacement.

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

Enter the 'approach' temperature

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

Choose the cleaning method used

Retaining bolts from the water boxes removed

Round nylon- or brass- bristled brush used to loosen the sludge

Condenser water tubes thoroughly flushed with clean water

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.

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.

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 pressure with gauges and compare to the reading on the Clear Language Display.

Check condenser pressure with gauges and compare to the reading on the Clear Language Display.

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.

Pressure readings fall within the specified ranges in the Operating Conditions table.

Sign off on the weekly maintenance check.