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HW+CH only some rads get warm

  • 07-03-2017 2:18pm
    #1
    phester28
    Registered Users, Registered Users 2 Posts: 470 ✭✭


    Hi All,

    Heating stalled (upgraded) over 5 years. Closed system Ideal Logic +, 2 valve system.

    Until I had an extra addition to the family I never used both CH+HW together.

    I found that when the HW is on some of the rads do not get warm.

    I have turned down the gate valve to the cylinder to 1/4 and done similar to the first 2 rads in the system but this has no real affect.

    The system layout is a bit chaotic with there being multiply drops from upstairs for rads.

    Also the static cold pressure at the boiler will be around 1.5bar but there is also a gauge at the filing point upstairs that will read about 0.5 bar lower.

    Would I be correct in thinking the pump in the boiler is just not circulating enough water?


Comments

  • #2
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,501 ✭✭✭BrokenArrows


    phester28 wrote: »
    Hi All,

    Heating stalled (upgraded) over 5 years. Closed system Ideal Logic +, 2 valve system.

    Until I had an extra addition to the family I never used both CH+HW together.

    I found that when the HW is on some of the rads do not get warm.

    I have turned down the gate valve to the cylinder to 1/4 and done similar to the first 2 rads in the system but this has no real affect.

    The system layout is a bit chaotic with there being multiply drops from upstairs for rads.

    Also the static cold pressure at the boiler will be around 1.5bar but there is also a gauge at the filing point upstairs that will read about 0.5 bar lower.

    Would I be correct in thinking the pump in the boiler is just not circulating enough water?

    Does turning off all the downstairs radiators resolve the upstairs heating problem?


  • #3
    phester28
    Registered Users, Registered Users 2 Posts: 470 ✭✭phester28


    I'm afraid the routing is a little more chaotic. But I'll try it next time I'm home.

    The boiler went into a down stairs extension and has a rad that is on both circuits. There is one more rad fed from the ground level. then the feed goes upstairs where the tank PRV, zones,bypass and upstairs rads as well as 2 drops for other rads downstairs. The final rad in the circuit is fed from upstairs to downstairs.


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