Trane Series R™ Helical Rotary Chiller RTHCD1F1F2

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.

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

Sign off on the oil sump level check.

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 of the Series R™ Helical Rotary Chiller.

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.

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]”

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.

Standard water applications will operate with less than a 10°F approach. If the approach exceeds 10°F cleaning the condenser tubes is recommended.

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

If the annual condenser tube inspection indicates that the tubes are fouled, 2 cleaning methods can be used to rid the tubes of contaminants.

Mechanical tube cleaning- this method is used to remove sludge and loose material from smoothbore condenser tubes.

Remove the retaining bolts from the water boxes at each end of the condenser. Use a hoist to lift the water boxes.

Work a round nylon- or brass- bristled brush (attached to a rod) in and out of each of the condenser water tubes to loosen the sludge.