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Radiant floor

Snowmelt
Snowmelt Member Posts: 1,383
Customer called, no heat in radiant floor, there are screens on the mixing valve that are cloggged, when taking the mixing valve off to clean it the hot side fell apart. I said I have to get a mixing valve but we can just use the old one and it will run at higher temp. My question is will sending 180 degree water to a radiant floor ruin the flooor in anyway or will it just shut off quicker ?

Comments

  • GroundUp
    GroundUp Member Posts: 1,495
    How does a valve "fall apart"?
  • GGross
    GGross Member Posts: 402
    Depends on the floor, most should not see supply higher than 120, some can call for supply of 140. 180 going to a radiant slab is generally very very bad, I would never even consider it
    Hot_water_fanIronmanHomerJSmithAlan (California Radiant) Forbes
  • Ironman
    Ironman Member Posts: 7,076
    More info is needed.

    Is it on a cast iron boiler or a mod/con? Are there other zones that require 180* SWT?

    In no way would I send that high a temp to a radiant floor.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • HomerJSmith
    HomerJSmith Member Posts: 1,927
    Wood floor-a killer. Carpet not so bad. Concrete slab-not good. Under floor-not so bad.
  • hot_rod
    hot_rod Member Posts: 18,224
    Concrete slab?  The old copper tube systems ran 180f!  Hard on certain floor covering🤓

    Back down the boiler temperature until the fix.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Snowmelt
    Snowmelt Member Posts: 1,383
    The plastics inside and spring came out. It looked like a small ball in the center I cant find , I’ll fix it this Friday.
    There’s 2 other zones set at 180 degrees.
    Let me ask in a different way, at 180 or 160 isn’t the water going to just heat up the area and turn off when the ( in the case) the floor sensor is satisfied.
    Like I said only for a week, but if I had to hold it off till next week I don’t see a problem except for short cycling
  • hot_rod
    hot_rod Member Posts: 18,224
    It will work fine without the checks, those are usually only used on DHW recirc. If it is a ASSE 1070 valve it will have checks included to pass listing.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Ironman
    Ironman Member Posts: 7,076
    What type of emitters are the other zones?

    You shouldn’t need water that hot in milder weather.

    Cut the SWT down to 140* for now.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Dave Carpentier
    Dave Carpentier Member Posts: 411
    Laminate floor wouldnt like that high either, it will curl up the edges apparently.
    We run 100-120 max into our slab due to some laminate in the bedrooms.
    30+ yrs in telecom outside plant.
    Currently in building maintenance.
  • Snowmelt
    Snowmelt Member Posts: 1,383
    Ok thanks all