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GA124 Gauge Fickering

CGeorge Member Posts: 4
edited February 26 in Gas Heating
We have a new install of a Buderus GA124 and Im not a professional boiler tech . 
Whats happening with this primary / secondary loop system is some boiler flashing thats causing the gauge to flicker. 
The only way Ive been able to help this issue is to replace the primary loop circ or increase the antifreeze concentration as in past we only ran about 25% . But after a couple days it comes back . I even went from a 007 to 008 and same thing happened .System pressure is always at 18-20 lbs. 
Thank you in advance

No the circ is not controlled by logic and
does not have a post time set up


  • neilc
    neilc Member Posts: 2,502
    post a picture of your setup,
    sounds like something isn't piped correctly,
    how new is new and where is your contractor ?
    known to beat dead horses
  • hot_rod
    hot_rod Member Posts: 20,725
    Some air trapped in the boiler passageways?

    Does that boiler require an aluminum specific glycol?  It’s rare to need more than 35- 40% glycol
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream