Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Boiler issues!!!

Jory Member Posts: 1
So I'm completely perplexed by my system. I have twin Veissman Vitocrossal 300 CT3 89 gas fired condensing boilers. They are not making good heat. I have no leaks on the closed loop, I'm not making up water on the loop. I have vented everything, no air. Pumps are showing 100 gpm at 42/ft head respectively. In short, I am at a loss. Could corrosion on the water tubes cause this or should I be looking somewhere else?


  • STEVEusaPA
    STEVEusaPA Member Posts: 6,506
    What are you doing with these 2 behemoths, heating the whole block?
    You're going to have to tell us a whole lot more about the system and include pictures.
    And who installed this?
  • Zman
    Zman Member Posts: 7,542
    This sounds like a controls issue. That being said, unless you are a very experienced commercial boiler tech, you will want to continue with great caution. What you are looking at is a very large State of the Art boiler plant, be safe...
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein