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To balance a cold water recirculation system, a CircuitSolver® Union Cold Water thermostatic valve is installed at the end of each branch or riser. The valve automatically monitors and modulates flow based on current water temperatures to maintain a set temperature in the system to mitigate Legionella growth.

The CircuitSolver® Union Cold Water balancing valve uses the same reliable and precise thermal actuator technology as the traditional CircuitSolver® for hot water balancing. Designed with ease in mind, the CSU-CW is offered in sizes ranging 1/2" to 1" and is available in a range of configurations to suit individual system needs.
Unit of Measure

Applications

 N/A Cold Water Recirculation Systems

Benefits

 N/A
  • Automatically and continuously adjusts to balance cold water recirculation systems
  • Reliable, long lasting thermal actuator
  • Long service life and 3 year warranty

Brands

 N/A ThermOmegaTech®

Certifications

 N/A American National Standards Institute (ANSI 61) National Sanitation Foundation (NSF 61)

Close Flow Coefficient (Cv)

 N/A 0.3

Design Features

 N/A
  • Never fully closes, small bypass of flow
  • Lead free for use in potable water systems
  • Stainless steel, corrosion-resistant construction

Design Flow Coefficient (Cv)

 N/A 1.50

Diameter (D)

N/A 2.5 in64 mm

Length (L)

N/A 4.7 in120 mm

Maximum Pressure

 N/A 200 psig14 bar

Maximum Temperature

 N/A 250 ºF121 ºC

Model

 N/A CircuitSolver®

Need for Dynamic Balancg

 N/A To discourage Legionella bacteria growth, cold water systems need to be recirculated and must be properly balanced to both establish continuous flow and keep line temperatures below 67ºF - the point at which Legionella begins to colonize.

Many vari

Open Flow Coefficient (Cv)

 N/A 2.7

Openg Temperature

 N/A XXX refers to the desired opening temperature. When the water temperature rises above this point the CircuitSolver® will begin to open, allowing water to easily enter the return line. For example, if you want 65ºF desired return temperature and the CSU-CW

Options

 N/A Check Valve Insert

Thread Size

N/A 1 in

Thread Type

 N/A National Pipe Thread (NPT)

Warranty

 N/A 3 years

Weight

 N/A 3.1 lb1.4 kg

Why Cold Water Recirculation?

 N/A
  • Keeps cold water moving and maintains water quality to reduce the impact of stagnation
  • Ensures "residual chlorine" is distributed throughout the cold water system
  • Keeps water temperature in branches and risers below 68ºF
  • VH

Additional formation

 N/A Dynamically & automatically balance cold water recirculation systems using the CircuitSolver® Union Cold Water (CSU-CW) thermostatic balancing valve.

Legionella in Non-Recirculated Cold Water Systems

Stagnant, warm water in a plumbing system