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CH Control Valve operation

  • 14-01-2024 5:32pm
    #1
    ConcretePat
    Registered Users, Registered Users 2 Posts: 17 ✭


    Mod 2 bed terraced house. OFCH. Closed system.

    Down stairs. 3 rads.

    Upstairs. 4 rads (2 beds, 1 bath , 1 en-suite) + HW cyl.

    Ref attached photos. I can't figure our how the valves are controlled ( Typ Myson Power Extra). Elect supply to each vv. but I cant see from where they get an operating signal.

    There are no sensors anywhere in the house. Not even a room stat. Rad T is controlled by the boiler stat.

    ( Photo ) CV1 is on the feed to the HW cyl. Putting the slider on cv1 to MAN allows 2 rads upstairs to heat.

    (Photo) CV2 is downstairs on a manifold. Not sure if it's supply or return. MAN position seems to control other 2 rads up stairs. I might be wrong.!


    Not my house. Just helping a neighbour out. Boiler had gone out on HT . I reset it and then checked around and found no pressure showing on the water gauge. Filled it up and bled the rads. Running fine now but the occupant doesn't know how these valves control the circuits.

    Any help welcome.

    CV1.jpg
    CV2.jpg




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