Putting sentinel into central heating system

Discussion in 'Plumbing and Central Heating' started by su966, 4 Apr 2013.

  1. su966

    su966

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    I want to put sentinel into central heating system. Do I have to drain out all the water or can I do it without draining out. Is it possible to just draining out one radiator. I can see there is drain out pipe connector in downstair radiators.
     
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  3. Breesey

    Breesey

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    Is your system sealed or a traditional vented system ie does it have a small tank in the loft?

    Either way you would need to drain off some water. If you have the small tank in the loft, switch off the boiler, isolate the water supply to this tank, attach a hose and drain enough water off from the drain valve you mention to just empty the tank. Put your inhibitor into the tank and then reinstate the water supply allowing the tank to refill. Bleed all the radiators, downstairs ones first, and then restart the boiler.

    If your sytem is sealed ie you have a small pressure gauge on the front of your boiler, switch off the boiler, attach hose to drain and let out enough water to allow you to put the inhibitor into an upstairs radiator. You will need to remove the plug at the top of the rad opposite the bleed screw and open the bleed screw as you put inhibitor in at the other end. Replace the plug (ensure seal is intact first) close drain off, remove hose, refill system to 1.5 bar on the gauge and then bleed all your rads, you may neeed to add more water to do this. When all rads are bled ensure boiler pressure is at 1 bar and then restart boiler.
     
  4. su966

    su966

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    My system has a small tank in the loft.
     
  5. hazetimesfive

    hazetimesfive

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    yo dawg, i heard you like to centinel so i put centinel in your centinel so you can centinel while you centinel
     
  6. CBF

    CBF

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    drinking on a skoolnite tut tut :D
     
  7. hazetimesfive

    hazetimesfive

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    every night is a school night sadly.. so drink every night


    yeeha
     
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