Trane Series R™ Helical Rotary Chiller RTHCC2B3C2

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

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>).

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: 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.

Is the service valve located on the bottom of the oil sump open?

Connect a line to the oil sump drain valve.

Is the valve open and allowing the desired amount of oil to flow into the container?

Measure the exact amount of oil removed from the unit.

Sign off on the compressor oil replacement

Run the unit fully loaded for approximately 20 minutes.

Attach the 3/8” or 1/2” hose with a sightglass in the middle to the oil sump drain valve and the condenser service valve at the top of the condenser.

After the unit is off line for 10 minutes move the sightglass along the edge of the condenser tubesheet at the same height of the oil sump.

Enter the oil level from the bottom of the oil sump.

If the level is below 2”, there is not enough oil in the sump. This can occur from not enough oil in the system or more likely, oil migration to the evaporator. Oil migration can occur from a low refrigerant charge, gas pump malfunction, etc.

If the oil is logged in the evaporator confirm the operation of the gas pump. If the gas pump is not functioning properly all oil will be logged in the evaporator.

After the level is determined, close the service valves and remove the hose/sightglass assembly.

Sign off on the oil sump level check