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Wirsbo 311 - Belimo 3 way Mixing Valve

NT3041 Member Posts: 11
Can someone help me in setting up a Wirsbo 311 with a 24v Belimo floating action mixing valve. If there is no mixing demand (remote stat is satisfied) , does the mixing pump simply stop and the valve remains in the same position as when the demand was there or does the valve go to the closed position.I would like the option of constant circulation, if the valve does indeed go to the the closed position when there is no call for heat.

Thanks in advance



  • SWEI
    SWEI Member Posts: 7,356
    edited July 2012
    floating action

    Describes the actuator "logic" - such as it is.  24V on one terminal rotates the actuator shaft clockwise and 24V on the other one moves it counterclockwise.  Spring return is a mechanical feature optioned when you order the actuator.

    Got a part number for the Belimo actuator?
  • NT3041
    NT3041 Member Posts: 11
    Belimo 3 Way Valve

    I believe it is B3-LRB24_3S.
  • SWEI
    SWEI Member Posts: 7,356

    B3 = 3-way ball valve (next two digits will indicate valve sizing and Cv)

    LRB24-3-S = 24V floating point actuator, non spring return.


    When power is removed from the actuator, it will stop where it is.
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