Trane Series R™ Helical Rotary Chiller RTAC185X

Warning: This procedure requires trained personnel with PPE!

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?

Perform all weekly maintenance procedures

Proper oil and refrigerant charge is essential for proper unit operation, unit perfor-mance, and environmental protection. Only trained and licensed service personnal should service the chiller.

Some symptoms of a refrigerant under-charged unit:

• Higher than normal discharge superheat

• Larger than normal evaporator approach temperatures (leaving water temperature - saturated evaporator temperature)

• Low evaporator refrigerant temperature limit

• Low refrigerant temperature cutout diagnostic

Ensure enough space around the outdoor unit for unrestricted access to all service points.

Enter the unit dimensions as per submittal drawings

Enter the minimum clearance for compressor service (Recommended: 4 feet or 1.2 m)

Is there sufficient clearance for the opening of control panel doors?

Ensure unobstructed flow of condenser air to maintain chiller capacity and operating efficiency.

Is there sufficient flow of air across the condenser heat transfer surface?

Is there any warm air recirculation or coil starvation?

Ensure no debris, trash, supplies etc. accumulate in the vicinity of the unit.

Is the condenser coil free of debris?

Specific connection and schematic wiring diagrams are shipped with the unit. Some piping and control schemes, particularly those using a single water pump for both chilled and hot water, must be analyzed to determine how and or if a flow sensing device will provide desired operation.

Follow the manufacturer’s recommendations for selection and installation procedures. General guidelines for flow switch installation are outlined below.

1. Mount the switch upright, with a minimum of 5 pipe diameters of straight hori-zontal run on each side. Do not install close to elbows, orifices or valves.

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

2. To prevent switch fluttering, remove all air from the water system.

NOTE: The CH530 provides a 6-second time delay after a “loss-of-flow” diagnostic before shutting the unit down. Contact a qualified service representative if nuisance machine shutdowns persist.

3. Adjust the switch 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.

4. Install a pipe strainer in the entering evaporator water line to protect components from waterborne debris.;