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Radiant

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kporter
kporter Member, Email Confirmation Posts: 2
edited October 2020 in Radiant Heating
Why would my circulator pumps on my Wirsbo 311 be running when system is not calling for heat? Warm weather shutdown down is active but floor is getting warm

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  • Zman
    Zman Member Posts: 7,569
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    Do you have an indirect water heater? Are there check valves installed?
    I picture with description of which circulators are running would help.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • kporter
    kporter Member, Email Confirmation Posts: 2
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    Have variable speed injection pumps on a completely Wirsbo system 17 years old. Pumps have internal checks. Pump running is the loop circ.
  • hot_rod
    hot_rod Member Posts: 22,141
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    there must be a t stat calling, a shorted wire, or a stuck relay.
    Has it worked in the past?
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
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    Is there a floor sensor on radiant job ?
    I have enough experience to know , that I dont know it all
  • Zman
    Zman Member Posts: 7,569
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    What is the controller telling you? Does it have a target temp and a percentage of modulation?
    I would verify that all the sensors are being read by the controller and are attached to the pipe. The controller will do weird things if input data is bad.
    BTW, that is a rebranded Tekmar, if you are having trouble finding manuals you can usually match it up with a Tekmar.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein

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