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L608A vaporstat hi low fire set up

clammy Member Posts: 3,092
How succesful has any one been using them for hi low fire control ?any real issues i should be aware of before i set out to use it for a hi low fire set up ,thanks for any input peace and good luck clammy
R.A. Calmbacher L.L.C. HVAC
NJ Master HVAC Lic.
Mahwah, NJ
Specializing in steam and hydronic heating


  • Steamhead
    Steamhead Member Posts: 16,719
    If it's the usual setup

    where the Vaporstat breaks the circuit to drop the boiler to low fire, it will work fine. 
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • JStar
    JStar Member Posts: 2,752

    I was just thinking about this concept the other day. Made a post about it. Figures, it already existed somewhere.
  • Dave in QCA
    Dave in QCA Member Posts: 1,785
    W-M Option

    Weil-McLain uses the setup you describe as on option on its LGB model boilers.
    Dave in Quad Cities, America
    Weil-McLain 680 with Riello 2-stage burner, December 2012. Firing rate=375MBH Low, 690MBH Hi.
    System = Early Dunham 2-pipe Vacuo-Vapor (inlet and outlet both at bottom of radiators) Traps are Dunham #2 rebuilt w. Barnes-Jones Cage Units, Dunham-Bush 1E, Mepco 1E, and Armstrong TS-2. All valves haveTunstall orifices sized at 8 oz.
    Current connected load EDR= 1,259 sq ft, Original system EDR = 2,100 sq ft Vaporstat, 13 oz cutout, 4 oz cutin - Temp. control Tekmar 279.
  • JStar
    JStar Member Posts: 2,752

    Well, at least I know it's a good idea. For whatever that's worth.
This discussion has been closed.