Trane Series R™ Helical Rotary Chiller RTAC300S

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 compressor 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.

Isolate the refrigerant charge outside of the compressor and close all four valves leading to the compressor?

Disconnect power to the chiller?

WARNING: Hazardous Voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

Evacuate the compressor through the service fitting provided?

Disconnect all four lines attached to the compressor, as well as the junction box?

Remove three screws from the bottom of the compressor?

Remove the compressor by sliding it out of the chiller onto a well supported skid or other platform?

Reinstall all lines, wires, and screws?

1. Perform all weekly and monthly procedures.

2. 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.

3. Have a qualified laboratory perform a compressor oil analysis to determine sys-tem moisture content and acid level. This analysis is a valuable diagnostic tool.

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

5. Inspect all piping components for leakage and damage. Clean out any inline strainers.

6. Clean and repaint any areas that show signs of corrosion.

Suction line isolation valve is closed

Oil return line service valve is closed

Liquid line service valve is closed

Select the pump used to move refrigerant

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.

Weight of the amount of charge removed

Does the weight of the charge removed match with the values in Table 1 - Table 4?

If there is a difference in charge, it may indicate a leak.

Is the charging hose attached to the evaporator service valve (3/8” (9mm) flare)?

Amount of charge added to the evaporator

Is the total circuit charge up to the level indicated in the chart?

Is the service valve closed and charging hose disconnected?