Trane Series R™ Helical Rotary Chiller RTAC200H

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.;

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?

Sign off on the refrigerant charging process

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)

Enter the clearance for control panel doors

Local codes requiring additional clearances will take precedence over these recommendations.

Ensure unobstructed flow of condenser air for maintaining chiller capacity and operating efficiency.

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

Avoid warm air recirculation and coil starvation.

Is there any warm air recirculation?

Secure the isolators to the mounting surface using the mounting slots in the isolator base plate. Do not fully tighten the isolator mounting bolts at this time.

Align the mounting holes in the base of the unit with the threaded positioning pins on the top of the isolators.

Lower the unit onto the isolators and secure the isolator to the unit with a nut. Maximum isolator deflection should be 1/4 inch (6 mm).

Level the unit carefully. Fully tighten the isolator mounting bolts.

Sign off on the isolator replacement

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

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