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tekmar Member Posts: 8
just bought a viessmann vitorond vr-21 with a riello burner  and a indirect hot water heater  no smart control for boiler yet $$$  it came with the honeywell control l8148  what would be the best settings on this control any help thanks


  • CMadatMe
    CMadatMe Member Posts: 3,086
    Minimum Water Temp

    The iron can handle a minimum water temp  of 120 without the injector that is put in at the factory when purchased with Vitotroinic Control. Just make sure you don;t condense the chimminey. Can't tell you where high limit needs to be. I don;t know the heat loss of each zone or the emitters. Are you zoning the boiler with priority? If so, whose zone controls. If your going to use a Taco just make sure it's and EXP version and you can add the PC701 for boiler reset down the line.
    "The bitter taste of a poor installation remains much longer than the sweet taste of the lowest price."
  • shoudabeenaplumba
    shoudabeenaplumba Member Posts: 74
    Hey, I wanna Viessmann

    Wherejachet that fancy little toy?  Imma lookin' fer a deal myself, but can't find one.
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