Trane Series R™ Helical Rotary Chiller RTHCD2D2E2

Warning: Disconnect ALL power before/during evacuation.

Cause of lost refrigerant determined and problem repaired?

Vacuum pump connected to the 5/8” flare connection on the bottom of the evaporator and/or condenser?

Enter the system pressure in microns after evacuation

Perform a standing rise test for at least an hour.

Enter the pressure rise in microns after the standing rise test

Pressure rise less than 150 microns?

Warning: This procedure requires trained personnel with PPE!

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 appears to be above 8”, the oil sump is completely full. Most likely more oil resides in the rest of the system and some oil needs to be removed until the level falls between 2” and 5” in 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.

Confirm the operation of the gas pump.

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

Gas pump returning oil to the compressor?

Enter the liquid level reading from the sensor

Enter the suction pressure reading

Enter the evaporator approach reading

Is the pressure drop across the filter within 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.

Sign off on the oil filter replacement

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

Condenser tube fouling is indicated when the “approach” temperature is 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.

Work a round nylon- or brass- bristled brush 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!

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 called out in step 1.

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

Note: To keep air from entering the oil, the charging valve connection must be air- tight.

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>).

Press <enter> to access the service tools group.

Press <next> 12 times to display “Master Oil Line Solenoid Valve: [Mode]”.