Figure A-3 — Typical Hot Water Piping

1. Gate Valve

2. Balancing Valve

3. Control Valve (See Submital Specification — Minimum six to eight unobstructed pipe diameters on either side of valve

4. Strainer

5. Bypass Circuit With Valve (Optional) —Valve Furnished By Others

6. Swing Check Valve

7. Thermometer

8. Pressure Gauge, Vent and Shut-off Valves

9. Union or Flanged Connection

10. High Heat Sensor (Furnished By Others) Required For Hot Water Supply Above 400 Degrees

Figure A-3 illustrates the recommended method for applying up to 370 F (+187.8 C) hot water to the generator section. The piping includes a circulating pump and secondary hot water loop and should be designed in accordance with good design practice providing strainers, unions and gate valves for ease of operation and maintenance. The pump circulates water through the generator at a constant rate and the temperature within the loop is controlled by mixing recirculated water with hot water from the supply main. A properly sized modulating two-way positive shutoff valve controls the amount of water leaving the loop and therefore, determines the temperature of mixed water entering the generator. This valve is provided by the Trane Company. This valve is also selected based on design flow and pressure drop requirements submitted by the consulting engineer.

The hot water inlet must always be connected to the right side of the machine. Right hand is determined by standing in front of the unit facing the control panels.