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.

Knight Boiler

bobbyg_2 Member Posts: 139
Hot Rod, I'm curious to see how the factory handles this moan. At the factory training for these Knight boilers they don't have anything listed for gas valve adjustments or suggested CO levels, etc.

When asked about this, the response was," each gas valve is adjusted on the assembly line and there shouldn't be any adjustments required."

thanks for the feedback.


  • Ross_7
    Ross_7 Member Posts: 577
    Hot Rod, did you fire your Knight Boiler,yet?

    Sorry if I missed out, I remember you posting pictures with the Caleffi hydrolink. I was just curious on how it was running.Thanks in advance!
  • Ross_7
    Ross_7 Member Posts: 577
    No response from Mr. Rohr?

    I guess I was put at the bottom of the list. :-)
  • hr
    hr Member Posts: 6,106
    Here I am

    I have two Knights up and running.

    I like the control, it has more features than other brands I have used and easy to program. I like the electrical connections, Every pump has a set of easy to use terminal screws, including a ground screw for every connection!

    I like the quick remove covers, no tools needed to gain access.

    Factory support has been great.

    The cases are razor sharp, be careful! On the second one I put a strip of tape on every metal edge, much better.

    Both of mine had to be field converted to LP. Fairly simple orfice install. Easier done before the boiler is install to get around back.

    I did, and do, have some slight moan sounds ocassionally. although I have had the exact issue with LP converted Ultras also. Takes some gas valve adjustments to make it go away. On the Ultra the factory support talked me through it.

    Getting rid of the noise takes priority over getting the emission numbers exact, so I'm told :) I adjusted the CO with my analyzer, but had to change those adjustments to get rid of the noise. Weird problem. Seems to be mainly LP units.

    hot rod

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Ross_7
    Ross_7 Member Posts: 577
    Thanks, Hot Rod!

    Thanks for the input! One of our wholesalers had recently added the Knight to their list of boiler options. With it being a newer boiler on the market I was curious to find how it was to install, and set up. Please keep the wall updated! Great to hear how new products do in the field. Thanks again!
  • ScottMP
    ScottMP Member Posts: 5,884
    Hot Rod

    I give you credit for being so open to products. You seem to be willing to give everthing a try and not stuck to one line.

    Have you tried a Buderus GB yet ?


    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • hr
    hr Member Posts: 6,106
    Me too

    Lochinvar actually flew a teh support person to my first install (my own) to help me dial in and get it up and running.

    You see in the Weil Ultra instructions to call the factory support if you the unit doesn't fire to spec.

    So I did and they had me adjust the valve while I had them on the phone (LP converted Ultra 80)

    I did get the emission numbers within their spec but still had a low fire moan.

    Keep adjusting was the word from tech support, until the moaning stops.

    Very small and slow adjustments. Barely an 1/8 turn then let it run to settle in. I got to moan to go away but the CO2 was altered also.

    Same thing on the Munchkin LP adjustment with the Dungs valve. The conversion instructions indicated 4 turns and leave it be. I've found I needed to back off to 3 turns to get the readings in spec, and get rid of low fire noise.

    I suspect LP is going to be a challange at low fire, regardless of the brand. Probably has to do with the calorifc value of the fuel from area to area? Maybe the temperature and tank volume. Seems to be a tricky fuel to deal with in modulating equipment.

    hot rod

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Paul Rohrs_4
    Paul Rohrs_4 Member Posts: 466

    Are you adjusting the throttle screw as is customary, or did you need to ultimately adjust the (Torx) offset screw?

    I have an LP model install in about a month, good to know.



    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
This discussion has been closed.