Trane Series R™ Helical Rotary Chiller RTAC130H

Follow the manufacturer’s recommendations for selection and installation procedures.

Mount the switch upright, with a minimum of 5 pipe diameters of straight horizontal run on each side.

Switch installed away from elbows, orifices or valves?

The arrow on the switch must point in the direction of flow.

All air removed from the water system to prevent switch fluttering?

The CH530 provides a 6-second time delay after a “loss-of-flow” diagnostic before shutting the unit down.

Switch adjusted to open when water flow falls below the minimum flow rate?

Evaporator data is given in the General Information section. Flow switch contacts are closed on proof of water flow.

Pipe strainer installed in the entering evaporator water line to protect components from waterborne debris?

Warning: This procedure requires trained personnel with PPE!

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

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 on units with remote evaporators or oil cooling circuits?

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

Is the refrigerant from liquid line evacuated and stored?

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.

EXV manually opened for 15 minutes

Water flowing in the evaporator prior to opening the EXV

Unit sat with heaters on to drive refrigerant out of oil and warm up compressor bearings

Depending upon ambient conditions, this may take up to 24 hours

UCM is powered so the pump may be energized if it detects a freeze condition

Oil level has returned to normal

Perform all weekly maintenance procedures