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  1. LamdaPro200

    Old house with oil/steam heat - help

    Here is why you should/must be using a LLH with a Vitodens 200. There is no TT on the boiler. The boiler logic utilizes a down stream/LLH sensor to maintain the proper supply side water temperature the system needs based on the set ODR curve. Second, Viessmann boiler pumps are sized for 40...
  2. LamdaPro200

    Oil prices are choking us to death. Convert to gas?

    Each is welcome to their opinion. I never said a gas conversion burner could not be done. I said to understand that you void the warranty or what is remaining and to check with your homeowner insurance to ensure that god forbid that converted boiler was the cause of something that they would be...
  3. LamdaPro200

    Oil prices are choking us to death. Convert to gas?

    Sorry Tom but have to disagree with you on both counts. Suggest you read the warranty. Specifically (3) and (6). A Gas Conversion burner is not approved by the boiler mfg. Additionally, this Limited Warranty does not cover claims you make if the failure, malfunction, or unsatisfactory...
  4. LamdaPro200

    Oil prices are choking us to death. Convert to gas?

    Down firing isn't going to help with the short cycling. I'm in a zero degree climate with 1650 sqft of heating space. R11 Walls, Double Pane windows and my heat loss is 36,000 Btu/hr. If your keeping the boiler the fix would be to add a buffer tank to allow the boiler to at least get to steady...
  5. LamdaPro200

    Hot Water

    If your adding an Indirect Fired Hot Water Heater it would be part of the closed hydronic heating system and the existing exp tank on the boiler takes care of that. With that said you may have to add a Thermal Expansion tank on the cold water if you added a backflow preventer on the cold water...
  6. LamdaPro200

    Convert steam radiators from oil to gas

    Sounds like he converted from steam to hot waters with a 90% boiler not a furnace. Have you looked at the Burnham MegaSteam. It is a 3-Pass Oil Fired Steam boiler with an AFUE of 86%. You can't get a cast iron gas boiler close to it even on the hot water side...
  7. LamdaPro200

    Flow rates in PEX / Air Elimination / Heat Transfer

    A 60-inch Power-Pipe System, for example, can raise the cold water temperature from 10°C (50°F) to as much as 24°C (75°F), under equal flow conditions. (From www.renewability.com). So we'll use the 45 Degree Rise.. 79,000/ (45 x 500) = 3.5gpm x 60 = 210gph continuous.. So yes because you...
  8. LamdaPro200

    triangle tube excellence review

    The Excellence has a 14 Gallon Indirect built into it and the boiler has an btu/ht output of 99,000 Btu/hr. Be careful with the literature. They use a 108 degree water temp in the calculation. It will provide 99,000/500/(120-50) = 2.7gpm x 60 Minutes = 163GPH Continuous. Add the 14 Gal Storage...
  9. LamdaPro200

    Will Air in line effect heat output

    A circulator pump does not pump water. It creates a differential. Get air bound, that differential is no longer. 1PSI will lift water 2.31ft. Typical residential heating system maybe 20' from the boiler to the highest radiation. 20/2.31 = 8.66 PSI though the typical boiler feed and exp tank are...
  10. LamdaPro200

    Flow rates in PEX / Air Elimination / Heat Transfer

    Recovery is going to be dependent on your temp rise which is the difference between the incoming cold and the DHW set point. 75,000/500/ (120-40) = 1.875 gpm x 60 Minutes = 112.5gph continuous rating. Just add the usable storage for 1st hour recovery. No matter the size it can only produce what...
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