Trane Series R™ Helical Rotary Chiller RTAC250H

Warning: Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

Perform all weekly and monthly procedures.

Check oil sump oil level while unit is off.

NOTE: Routine changing of the oil is not required. Use an oil analysis to determine the condition of the oil.

Have a qualified laboratory perform a compressor oil analysis to determine system moisture content and acid level.

Contact a qualified service organization to leak test the chiller, to check operating and safety controls, and to inspect electrical components for deficiencies.

Inspect all piping components for leakage and damage.

Clean out any inline strainers.

Clean and repaint any areas that show signs of corrosion.

Warning: This procedure requires trained personnel with PPE!

Use the initial charging procedure under the following circumstances:

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:

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.

Compressor installed 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.

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.

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?

If there is a difference in charge, this 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.

Suction line isolation valve is closed

Oil return line service valve is closed

Liquid line service valve is closed

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