Trane Series R™ Helical Rotary Chiller RTHCC2B3C2

Locate the 1/4” schrader valve between the ball valve and oil filter (or the ball valve and oil cooler, if so equipped).

Loosely connect oil pump to schrader valve.

Is the oil pump connected to the schrader valve?

Operate oil charging pump until oil appears at the charging valve connection; then tighten the connection.

Is the oil visible at the charging valve connection?

Close the ball valve just upstream of the schrader valve connected to the oil pump.

At the UCP2 display panel, press <Service Tests> and enter the password (++--++) followed by <Enter>).

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: Disconnect ALL power before/during evacuation.

Connect the vacuum pump to the 5/8” flare connection on the bottom of the evaporator and/or condenser.

Enter the system pressure in microns

Is the pressure below 500 microns?

Perform a standing rise test for at least an hour.

Enter the pressure rise in microns

Did the pressure rise more than 150 microns?

If the pressure rose more than 150 microns, describe the potential issue

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.