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Munchkin V Knight Hx's

ALH_4 Member Posts: 1,790
<a href="http://www.giannoni.fr/products.php"target="_blank">Giannoni</a> does make several different heat exchangers as well as many sizes of each. I am not sure exactly which model the Knight and Munchkin each have, but no doubt that is where the difference lies.


  • Brendan_4
    Brendan_4 Member Posts: 12
    Munchkin V Knight Hx's

    Hi all looking for a little verification on the heat exchangers of the Munchkin 80m verses the Knight 80 i was lead to believe they are both made by the same French company.

    I noticed in a previous thread that the Knight is using a larger pump 26-99 verses 007 for the Munchkin.

    Does this mean the Hx's are a different design or if not why the different size pump?
  • Ted_9
    Ted_9 Member Posts: 1,718
    Munchkin 80M

    If you are piping with 1 1/4" than the 007 or a ups15-58 speed2 or a NRF-22 is good for the 80M.

    I'm not 100% sure but the Knight used to show 1" piping and that could be why they show a larger circ.
  • Steve Ebels_3
    Steve Ebels_3 Member Posts: 1,291
    I never heard either

    But I saw the service bulletin on the Knight. IIRC, they are calling for a 26-99 or equivalent as the boiler pump even on the small models. I would speculate that they had some issues with perking or overheating and shutting down due to low flow with the 007/15-42/NRF-22. Seems to me that defeats the purpose, in a way, of purchasing a M/C boiler in the first place. That's a steady draw of roughly 200 watts. One thing to use a circ like that on a boiler with 200+ output and the load to go with it. Another thing entirely in my book on an 80K unit.

    I'm waiting for a VS circ that will respond to a temperature input. That would take care of the boiler temp and the waste of energy at the same time.
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