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Honeywell thermostatic mixing valves/heat only

1idmfd
1idmfd Member Posts: 2
in Radiant Heating
New mixing valve not working (radiant,) other three work fine


Comments

  • Jamie Hall
    Jamie Hall Member Posts: 24,491
    That's just a bit vague... can you be more specific?
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • HVACNUT
    HVACNUT Member Posts: 6,215
    Is the mixing valve new because the old one wasn't working, and now the new one isn't working?
    Are all 3 new?
    High temp, low temp, no temp?
    Circulator is running?
    All circuits are purged, well?
    Toilet flushes?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,248
    need to develop my x ray vision
  • GroundUp
    GroundUp Member Posts: 2,064
    Okay
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    It might be broken.

    There was an error rendering this rich post.

  • 1idmfd
    1idmfd Member Posts: 2
    System is brand new.4zone radiant on a Navien.. 110 heat only boiler. My question is can the mixing valve be defective out of the box? How can I determine and/or test?


    mjstraw
  • HVACNUT
    HVACNUT Member Posts: 6,215
    1idmfd said:
    System is brand new.4zone radiant on a Navien.. 110 heat only boiler. My question is can the mixing valve be defective out of the box? How can I determine and/or test?


    Of course it can be bad out of the box, but not likely. I had a bad out of the box thermocouple the other day. 
    Have you tried swapping mixing valves with one you know works?
    What make and model valve?
    What make and model radiant block?
    How many loops?
    What size?
    How long is each loop?
    What make and model circulator?
    What's happening (or not happening) that makes the mixing valve bad?
  • neilc
    neilc Member Posts: 2,784
    and , of course, pictures,
    general wide angle view of the bad valve as it's piped and installed,
    and of one of a working valve,
    known to beat dead horses

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