Trane Series R™ Helical Rotary Chiller RTAC200S

Proper oil and refrigerant charge is essential for proper unit operation, unit perfor-mance, and environmental protection. Only trained and licensed service personnal should service the chiller.

Some symptoms of a refrigerant under-charged unit:

• Higher than normal discharge superheat

• Larger than normal evaporator approach temperatures (leaving water temperature - saturated evaporator temperature)

• Low evaporator refrigerant temperature limit

• Low refrigerant temperature cutout diagnostic

Secure the isolators to the mounting surface using the mounting slots in the isolator base plate. Do not fully tighten the isolator mounting bolts at this time.

Align the mounting holes in the base of the unit with the threaded positioning pins on the top of the isolators.

Lower the unit onto the isolators and secure the isolator to the unit with a nut. Maximum isolator deflection should be 1/4 inch (6 mm).

Level the unit carefully. Fully tighten the isolator mounting bolts.

Sign off on the isolator replacement

CAUTION: Evaporator Damage! Water must be flowing through the evaporator during the entire charging process to avoid freezing and rupturing of the evaporator tubes. Charge first with vapor to avoid freezing tubes.

Note the weight of the amount of charge removed

Compare the weight of the charge removed to Table 1 - Table 4. Is there a difference in charge?

A difference in charge may indicate a leak.

Attach a photo of the attached charging hose to evaporator service valve (3/8” (9mm) flare)

Add charge to evaporator to bring total circuit charge up to the level indicated in the above chart.

Attach a photo of the disconnected charging hose.

Warning: This procedure requires trained personnel with PPE!

Has virtually all of the oil been removed?

Has the oil charge been removed from the compressor and oil system only but the unit has been run for less than 15 minutes?

Has the oil charge been removed from the compressor and oil system only and the unit has been run for more than 15 minutes?

If small quantities of oil were removed to service refrigeration components, such as the evaporator, simply replace the oil that was removed into the serviced component prior to vacuum and recharge of the refrigerant.

If oil was removed from the compressor only to service a compressor or change the oil filter follow this procedure:

Is the compressor a new compressor or has been removed from the system and reworked?

Add 1 quart (2 lb.) oil to the motor cavity prior to installing the compressor into the chiller.

Is the compressor installed in the system?

Warning: This procedure requires trained personnel with PPE!

Is the unit new or has had all of the oil removed?

If not, report the issues to the maintenance team and stop the procedure

High side of the system not pressurized?

Oil charging port is a ¼” (6mm) flare fitting with a schrader valve on the side of the oil filter housing.

Choose the method of oil charging

CAUTION: Use only Trane OIL00048 in the RTAC units to avoid any catastrophic damage to the compressor or unit.