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Buderus furnace (Logamatic 2107) intermittent power to zone value control box...

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steadiguy
steadiguy Member Posts: 3
in Oil Heating
Hello. We have a Buderus furnace and keep having intermittent power to the zone value control. Checked wiring, nothing loose or obvious. Any help would be greatly appreciated!:)

Thanks

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,624
    What brand of zone valve control do you have?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • steadiguy
    steadiguy Member Posts: 3
    Taco
  • Robert O'Brien
    Robert O'Brien Member Posts: 3,584
    If the Zone control is controlled by the 2107, it will be disabled when OAT is above WWSD
    BennyV
  • BennyV
    BennyV Member Posts: 49
    Check WWSD? Also, is it doing DHW when the power goes out to the zone valve board? That's how it is supposed to work, DHW always has priority. It was designed for mid- to high-mass heating systems where you have to give DHW priority over the heating circuits, but it ends up being sort of odd on a low-mass system, especially with hydro-air or unit heaters.
  • steadiguy
    steadiguy Member Posts: 3
    Aha! Yes, zone control is connected to the 2107, that make sense since the DHW has priority:) Thanks guys!
  • HVACNUT
    HVACNUT Member Posts: 7,188
    You can disable DHW priority on the 2107 if you want too. I can't remember if it can be programmed with a set time limit to switch back over to space heating if the DHW demand is too long.

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