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?

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?

Notes on the condition of the compressor and internal components

Sign off on the 3 Yearly Series R™ Helical Rotary Chiller Maintenance

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

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 requires trained personnel with PPE!

Chiller shut down on a “Low Oil Flow” diagnostic?

Compressor shut down on a “Loss of Oil at Compressor (Running) diagnostic?

Pressure drop between the two service valves in the lubrication circuit

If pressure drop exceeds the maximum level, proceed with the following steps

Isolate the oil filter by closing the two ball valves located before and after the filter.

Relieve the pressure from the hydraulic line through the 1/4” schrader valve located between the ball valve and the oil filter (or the ball valve and oil cooler, if so equipped).

Use a rubber mallet to break loose the nut that secures the oil filter element to the filter manifold.

Turn the nut clockwise until the filter element detaches from the manifold.