Bypass Piping • Bypass 100 Percent Flow into Tower Basin (No Limitations)• Bypass 100 Percent Flow into Pump Suction

(Ensure 15'+ of Tower Elevation Above Bypass Valve)• Partial Bypass Increases the Risk of Fill Fouling and Ice· Formation in Winter Months

- Condenser Water Return (CR) - Condenser Water Supply (CS)

- Bypass Line

•••••.....•.••••.....•••.••.................••.•••.•.........

FIGURE 3. Bypassing the cooling tower is a common control function that is utilized in cool-to-cold climates to avoid or eliminate large volumes of cold water entering the condenser of the chiller.

Pull Down Example Elevated Horizontal Piping above Cooling Tower Sump Will

Drain Back to the Cooling Tower at Shutdown

Example: • 9" Operating Level, Approximately 500 gal Volume• 15" Overflow Level, Approximately 1,000 gal Volume• Approximately 225 gal of Water in Suspension

1,100 gal ofFlow · 500 gal Operating- 225 gal Suspension

375 gal Drain Down Capacity

375 gal= 50.1 ft3

Pipe Volume= TT (radius)2 (length) 50.1 ft3 = TT (0.4 7 7)2 (length) 92 ft= length

92' of 10" Pipe Can Drain Back into the Tower during Pump Shutdown without Causing an Overflow Condition

* Check Valve

- Condenser Water Return (CR) - Condenser Water Supply (CS) .....................•........ � ...••.•••••••....••••.•...•...

FIGURE 4. Pull down essentially is the volume of water required to prime the condenser loop when the pumps are initialized to start.

Owens Corning™

FOAMULAR® XPS

Fabrication Billets

The Refrigeration System

Insulation Trifecta

• Better Thermal Performance

• Better Moisture Performance

• Better Compressive Performance

For more information visit commercial.owenscorning.com/products/oem/billets

THE PINK PANTHER" & <Cl 1964-2015 Metro-Goldwyn-Mayer Studios Inc. All Rights Reserved. The color PINK is a registered trademark of Owens Coming. <C> 2015 Owens Corning. All Rights Reserved.

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