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Upstairs Rads Not Heating. Pressure Issue?

  • 20-12-2016 9:58pm
    #1
    SachaJ
    Registered Users, Registered Users 2 Posts: 1,746 ✭✭✭


    Hi guys....

    I'm having trouble getting the upstairs radiators to heat up. The bottoms are all hot but half way up they start getting cold. I have bled the air out of them and not much of a difference.

    I'm wondering do I have a pressure issue. One radiator does work properly and it is the first one in the chain upstairs (I believe). That radiator is directly above our tank and all the piping (the tank is in the downstairs utility room) in the attached photos.

    The pressure meter is showing 0.2 bar which according to an online calculator is stating less than 3 PSI. Reading other stuff online is saying it should be up around 12 PSI.

    Any ideas how I go about increasing the pressure? Or could it be the pump is not strong enough? The heating system was completely redone 4 years ago.

    Some photos attached of the piping put in by the plumber at the time. The top right yellow box is the valve (?) for the upstairs heating zone and seems the pressure meter is attached to that piping. The top horizontal pipe is bringing the hot water upstairs I believe.

    Any help appreciated.

    Pressure.JPG

    Piping.JPG


Comments

  • #2
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,380 Mod ✭✭✭✭Wearb


    At the lowest point of the flexible hose (over the white trunking) is a valve that can be operated with a screwdriver. Slow turn it about 45° while watching the gauge. Close it back to where it was when gauge shows between half and one bar. Bleed a few rads and repeat proscesss until all rads done. That should sort it.

    Please follow site and charter rules. "Resistance is futile"



  • #3
    SachaJ
    Registered Users, Registered Users 2 Posts: 1,746 ✭✭✭SachaJ


    Wearb wrote: »
    At the lowest point of the flexible hose (over the white trunking) is a valve that can be operated with a screwdriver. Slow turn it about 45° while watching the gauge. Close it back to where it was when gauge shows between half and one bar. Bleed a few rads and repeat proscesss until all rads done. That should sort it.

    I'll try that now while the heating is off. So by bleeding the rads it's lowering the pressure in the system and the proper pressure is about 0.75 bar?

    Thanks, appreciate it....


  • #4
    SachaJ
    Registered Users, Registered Users 2 Posts: 1,746 ✭✭✭SachaJ


    Also what should be the pressure in the system when the heating is on and off? I think it goes up by about 0.2 bar when the heating is on.

    On 0.75 bar?
    Off 0.5 bar?


  • #5
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,380 Mod ✭✭✭✭Wearb


    SachaJ wrote: »
    Also what should be the pressure in the system when the heating is on and off? I think it goes up by about 0.2 bar when the heating is on.

    On 0.75 bar?
    Off 0.5 bar?
    About .75 cold. About twice that when hot (depending on size of expansion vessel).

    Please follow site and charter rules. "Resistance is futile"



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