micro bore problem

[Humph]

Ive got a microbore system in my house and have rececntly changed 1 rad and fitted new valves on another as it wasnt getting hot.The rads were fed by 2 10mm pipes connecting at the same side of the rad but i was told to fit 1 pipe at 1end and run the other to the opposite side which did using compression elbows so i now have valves at both ends.The rads work brilliant but i was unsure weather i had to leave both valves open or if 1 has to be closed,they are both open at the moment.Can any one clear this up for me????
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Moderator

split from hi-jacked post

 

[ChrisR]

All rads should be "balanced" with each other so they all heat up together. Do a search on that.

 

[Humph]

Have done a search on balancing rads but it just confused me even more.How do i know which pipe is feed and which one is return,or does it matter,they both come from the same manifold????

 

[ChrisR]

If they come from the same manifold it ain't gonna work! One should come from a flow mani and tother from the return one. It doesn't matter which way round they are.

 

[kevplumb]

might be a micrafold with the disk in the middle

 

[ChrisR]

Wossat? A new Nissan?

 

[kevplumb]

no an old yorkshire invention

 

[Humph]

Is this anything to worry about as i was thinking of doing same to another rad as exsisting valve looking a bit corroded????

 

[ChrisR]

If it works, fair enough. The rad valve doing the limiting will be the one most closed (yeh OK unless they're the same). It doesn't matter which one it is. SOme trv's can be set to limit max flow too, so the other valve would be full open.

 

[Humph]

Thanx for the advice,,much appreciated