Trane Series R™ Helical Rotary Chiller RTHCC2D3E3

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.

NOTE: Glycol in the water system typically doubles the standard approach.

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.

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

Is the gas pump returning the oil to the compressor?

Enter the pressure drop across the filter at full load conditions.

Is the pressure drop within the normal range?

If the pressure drop is not within the normal range, proceed with the filter replacement.

Upload a photo of the replaced filter.

Post-replacement, is the gas pump returning the oil to the compressor?

Sign off on the filter replacement procedure.

Warning: Disconnect ALL power before/during evacuation.

Is the cause of lost refrigerant determined and repaired?

Is the 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

Did the system pressure rise more than 150 microns during the standing rise test?

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

Sign off on the refrigerant charge procedure

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

Pressure readings should fall within the following ranges specified in the Operating Conditions table:

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.

Sign off on the weekly maintenance

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