Trane RAUC-C50 Installation Air Vents, Water Pressure Gauges, Water Shutoff Valves, Pipe Unions

Installation

Air Vents

Vents must be installed at high points in the piping system to facilitate air purging during the filling process.

Water Pressure Gauges

Install pressure gauge(s) to monitor the entering and leaving chilled water pressure.

NOTICE

To prevent evaporator damage, do not exceed 150 psig evaporator pressure.

Water Shutoff Valves

Provide shutoff valves in the “Supply” and “Return” pipe near the chiller so the gauge(s), thermostats, sensors, strainer, etc., can be isolated during service.

Pipe Unions

Use pipe unions to simplify disassembly for system service. Use vibration eliminators to prevent transmitting vibrations through the water lines.

Thermometers

Install thermometers in the lines to monitor the evaporator entering and leaving water temperatures.

Balancing Valves

Install a balancing cock (valve) in the leaving water line. It will be used to establish a balanced flow.

Note: Both the entering and leaving water lines should have shutoff valves installed to isolate the evaporator for service.

Strainer

Install a pipe strainer in the water return line to protect the components from entrapped debris.

Chiller Drain

The chiller drain should be piped to a suitable drain facility to facilitate evaporator draining during service or shutdown procedures. Provide a shutoff valve in the drain line.

Note: The BPHE chiller does not include a drain plug. Drain piping and shutoff valve must be installed at the lowest point in the water piping to insure proper draining of the chiller. Insure that the drain is closed before filling system with water.

Chiller Flow Switch

Install a flow switch or other flow sensing device, illustrated in Figure 23, to prevent or stop the compressor operation if the water flow drops off drastically. A flow switch ships with a each unit when a “T” is included in the miscellaneous digit of the model number. Locate the device in the chilled water supply line (water outlet) as shown in Figure 22. Refer to the field wiring and unit schematics for the flow switch electrical interlock connections.

Water Temperature Sensor

The Temperature Sensor and Sensor-well must be installed in the leaving water piping as close to the chiller as possible. Both devices are located inside the remote panel. Thermal paste is also provided inside the remote panel and must be used when installing the sensor into the sensor-well. Refer to Figure 22 for the recommended location. Figure 24 illustrates the Sensor-well dimensions.

42 SS-SVX09A-EN