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Baxi HT380, servicing

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GW
GW Member Posts: 5,105
in Gas Heating
gas guys, we have 5 Baxi HT380's we take care of. Does anyone have a trick to get a good reading on the expansion tank? I fear my basic pump with its basic gauge is good, but not great, One of the boiler we service upchucked its exp tank recently, so now it's on our minds. Thanks for any comments. Gary
Gary Wilson
Wilson Services, Inc
Northampton, MA
gary@wilsonph.com

Comments

  • SWEI
    SWEI Member Posts: 7,348
    Do you have isolation valves to remove the system from the equation? Drain valves?
  • superdave
    superdave Member Posts: 155
    The best way we do it is close the valves at the boiler and drain the boiler by its low point drain and then check the PSI with no water in system. I know you do need to keep that EX tank in use because of the DHW side of the boiler.
    Good luck.
  • GW
    GW Member Posts: 5,105
    SWEI, just the factory valves, but draining isn't so much the issue (and filling), it's the tap for the exp tank is way up high, I am wondering what tricks may be out there to get an good reading on the psi. Thanks, gw
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • GW
    GW Member Posts: 5,105
    SuperD, thanks, any hot tips to check and or add pressure? That schrader valve is way up high. Thanks, gw
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • SWEI
    SWEI Member Posts: 7,348
    If the only issue is getting to the Schrader valve, would something like this help?
  • kcopp
    kcopp Member Posts: 4,601
    Well this should help...
    http://www.grainger.com/product/CHERNE-INDUSTRIES-Extension-Hose-1VNH4
  • GW
    GW Member Posts: 5,105
    thank you both, I dig the 90 degree fitting. Merry Christmas and may no heating systems take a nap tonight.
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • icesailor
    icesailor Member Posts: 7,260
    My wholesaler had the Cherne hoses by the bin full. Along with the test balls.
    GW
  • superdave
    superdave Member Posts: 155
    Sorry for the delay. I unscrew the round plate on top of the boiler. and swing it out of place and then I put the PSI test on it. I can fit most of my hand in the hole about 3.5" round.
    GW
  • GW
    GW Member Posts: 5,105
    Thanks for the comments....does this newer site have a way to get an email notice if a reply comes in?
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • SWEI
    SWEI Member Posts: 7,348
    Click on the star at the top right corner of the first post.
  • GW
    GW Member Posts: 5,105
    Thanks
    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • hot_rod
    hot_rod Member Posts: 25,918
    Look for an RV type air pressure gauge. They are available with a rubber hose and read accurately down on low pressures.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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