Trane Series R™ Helical Rotary Chiller RTAC140S

Suction line isolation valve is closed

Oil return line service valve is closed

Liquid line service valve is closed

Select the method used to move refrigerant from the condenser to evaporator

NOTE: If a pump is to be used, connect it before closing this valve. This port is only isolated when the valve is back seated. If a vacuum pump is used, then connect it to the discharge line service valve near the oil separator.

Evaporator is large enough to hold all the charge for any unit to below the center-line of the shell

Sign off on the Low Side Charge Isolation

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!

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

If the isolation valves is closed, then the charge may be trapped in the evaporator. In either case, the high side of the system should not be pressurized.

Is the oil line shut off valve open?

The oil charging port is a ¼” (6mm) flare fitting with a schrader valve that is on the side of the oil filter housing. This is the port that must be used to add oil into the compressor so that the filter and lines are full at the first start of the compressor.

On single or two compressor circuits?

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

Choose the method to put oil into the unit

NOTE: The compressor filter has an internal shut off valve that will prevent oil from entering the compressor while the compressor is not running. Therefore, there is no concern about flooding the compressor with oil.

Liquid line service valve is shut

Oil return line service valve is shut

Circuit started with the service tool (access compressor service view in Techview)

Discharge check valve closed after unit trip

Discharge isolation valve is closed

Oil line shut off valve is closed

Refrigerant remainder recovered

NOTE: Remaining vapor can be recovered/stored in the high side of the system. Be certain to follow proper recovery procedures to avoid introduction of non-condensable gases.

Use the initial charging procedure under the following circumstances:

• When virtually all of the oil has been removed.

• If the oil charge is removed from the compressor and oil system only but the unit has been run for less than 15 minutes.

• If the oil charge is removed from the compressor and oil system only and the unit has been run for more than 15 minutes. However, reduce the amount of oil added to the unit by the normal quantity of oil in refrigeration system.

NOTE: This procedure can be followed even with the refrigerant charge isolated in the evaporating section of the unit. 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:

1. If the compressor is 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 com¬pressor into the chiller.

2. Install the compressor in the system. Make sure that the filter shut off valve is closed. Other compressor isolation valves may also be closed depending upon the service that was completed. For example, changing the oil filter would require the compressor to be isolated and pulled into vacuum.

NOTE: Make sure that compressor is not pressurized.