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Radiant Floor System

We are installing a radiant floor heating system using an open loop water-water heat pump. The source side of the heat pump has a desuperheater circuit for pre-heat of the domestic hot water.

There are two separate circulating systems: domestic hot water, and the radiant floor system.

We are using the "pumping away" configuration for both systems, with primary-secondary circulators on the radiant side.

The plumber who is installing the system has asked why we do not have a "circuit setter" (or "balancing valve") in either the domestic side or the radiant side.

Is this the same as a differential pressure regulator?

Any feedback?

Do we need this?


Where should we place it in the domestic side?

Where on the radiant side?

Any help is greatly appreciated!



  • Glenn Harrison_2
    Glenn Harrison_2 Member Posts: 845
    A circuit setter is...

    a device that would control how much water in gallons per minute can be circulated thru the radiant and domestic loops. The setting and locations of the circuit sttters should be provided by the manufacturer of the heat pump, to ensure proper operation of the unit.
  • hr
    hr Member Posts: 6,106
    Also those

    pump and dump geo systems need a flow setter on the water dump discharge line.

    I'd get a globe valve or a GOOD flow setter. They eat ball and gate valves quickly :) Most guys around here use a pvc valve of some sort.

    They need to be adjusted and stay in adjustment or the flow rates get off and could lead to compressor problems.

    hot rod

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