Trane Series R™ Helical Rotary Chiller RTAC350X

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 trips

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.

While unit is running in stable conditions

Check MP pressure for evaporator, condenser and intermediate oil

Observe liquid line sight glass on EXV

If liquid line sight glass has bubbles measure the subcooling entering the EXV. The subcooling should never be less than 4 °F under any circumstances

A clear sightglass alone does not mean that the system is properly charged. Also check the rest of the system operating conditions

Inspect the entire system for unusual conditions and inspect the condenser coils for dirt and debris. If the coils are dirty, refer to coil cleaning

Sign off on the weekly maintenance

Warning: This procedure requires trained personnel with PPE!

Temperature downstream of the filter is 8°F (4.4°C) lower than the upstream temperature?

Ensure proper subcooling before taking temperature readings.

Is the EXV closed with the unit off?

Is the liquid line isolation valve closed?

Is the ball valve on oil cooler liquid line closed (for units with remote evaporators or oil cooling circuits)?

Attach a photo of the attached hose to service port on liquid line filter flange.

Is the refrigerant from liquid line evacuated and stored?

Inspect the individual pieces of the shipment for obvious damage

Inspect the unit for concealed damage

If concealed damage is discovered, stop unpacking the shipment.

Provide evidence that the damage did not occur after delivery

Notify the carrier’s terminal of the damage immediately, by phone and by mail.

Notify the Trane sales representative and arrange for repair.

Was the damage inspected by the carrier’s representative before repair?

Sign off on the inspection checklist

Attach vacuum hoses to evaporator service valves (one per circuit)

Attach charging hoses to the charging port on the liquid line filter (one per circuit)

Begin semi-automatic vacuum procedure

When vacuum is complete (indicated), manually isolate the unit from vacuum

Charge unit through the filter housing port per Table 1 - Table 4

When charging is complete, shut evaporator service valve

Disconnect vacuum and charging hoses