Trane Series R™ Helical Rotary Chiller RTHCC2D3E3

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

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

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 appearing 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>).

Clean all water strainers in both the chilled and condensing water piping systems

Measure the oil filter pressure drop

Replace oil filter if required. Refer to “Service Procedures”

Measure and log the subcooling and superheat. Refer to Table 26

If operating conditions indicate a refrigerant shortage, leak check the unit using soap bubbles

Trim refrigerant charge until the unit operates in the conditions listed in Table 26 at full load, ARI conditions

NOTE: ARI conditions are: condenser water: 85°F and 3 GPM/XXX tons and evaporator water: 54-44°F

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 line connected to the oil sump drain valve?

Is the valve open and oil flowing into the container?

Measure the exact amount of oil removed from the unit.

Sign off on the compressor oil replacement