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Boiler pressue when on?

  • 23-11-2017 10:13PM
    #1
    oceanclub
    Registered Users, Registered Users 2 Posts: 3,413 ✭✭✭


    On the water tank there's a red hand showing 1.5 bars - is that the max pressure to top up to when the heating is off or on?

    I ask as the boiler didn't start tonight as the pressure had gone down to less than 0.5 bar. Just topped it up to just over that. Now that the heating is on, the black hand is at about 1.8 bar - over the 1.5 red hand. Is that OK?

    P.


Comments

  • #2
    SickBoy
    Registered Users, Registered Users 2, Paid Member Posts: 3,604 ✭✭✭SickBoy


    1 bar at idle. It will climb when on.


  • #3
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,707 Mod ✭✭✭✭Wearb


    Seems OK. What is it at now -when cold?


  • #4
    oceanclub
    Registered Users, Registered Users 2 Posts: 3,413 ✭✭✭oceanclub


    Wearb wrote: »
    Seems OK. What is it at now -when cold?

    I just topped it up to just over 0.5 bar. When cold I'll top it up to 1. Not sure why it went down - had a boiler service by Bord Gais last week.

    P.


  • #5
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,707 Mod ✭✭✭✭Wearb


    oceanclub wrote: »
    I just topped it up to just over 0.5 bar. When cold I'll top it up to 1. Not sure why it went down - had a boiler service by Bord Gais last week.

    P.

    That will probably give you a hot reading of about 2.3, should still be ok.
    As for pressure drop...did you bleed any rads? Also check that the prv (usually piped to outside below the flue, but not always) isn't letting water pass.


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