Flow and return (Vogel and Noot radiator) - Bottom feed

[GillmarB]

Last year we had a rad removed from lounge and a new Vogel and Noot flat panel rad installed on an adjacent wall. It has a centre bottom feed for flow and return. The rad has never got beyond tepid (and that is only at the back). Vogel and Noot (who are fantastic!) suggest that that the flow and return are the wrong way around. The plumber, prior to this advice, did all the tests, flushed, balanced etc but is in denial that the flow and return are the problem. The hotter pipe is in the return position so we think it is wrong. Can anyone just reassure me before I insist he returns to rectify. Thanks.

 

[SimonJohns]

Hottest pipe will be the flow.

 

[WHPES]

If you have TRVs fitted, check they are bidirectional. (will have arrows marked on the metal). If the arrows are opposite to the flow, the water pressure will try to close the valve as its going the wrong way.

Is the lockshield fully open?

Otherwise may need to check balancing again.

What happens if you shut off all the other radiators but that one? Does it get hot then (don't leave like it for long or it will strain the pump)



PS to other forum members - did you know Myson has been taken over by Vogel and Noot?

 

[wazzer]

Some rads have a gizmo in them like a non return valve so if its got one of these in it it dose matter

 

[GillmarB]

Thanks for reply Dan

I am not a plumber so excuse my description...the feeds go into the radiator vertically at the bottom centre - just two pipes with nothing else; there is a themostatic adjustment on the top right side of the radiator. Plumber has tried closing all others off and balancing with no improvement. I feel he is convinced there is an underfloor problem - but how could there be if the original radiator did heat up?

 

[GillmarB]

Thanks Simon - then they are in the wrong way and as 'Wazzer' says, I think they may be a non-return 'gizmo'. Just need to convince the plumber now.

 

[SimonJohns]

Just been reading on their site. The flow has to be on the left. I think this is prob due to the design with the trv on the top corner

So to recap

Hot on left

If not it's wrong

 

[GillmarB]

~Thanks Simon - you have confirmed it is wrong - just got to get the plumber to get beyond his 'ego' now! He is a great chap but is having difficulty admitting to this! Very much appreciated.

 

[WHPES]

Swap the valves over and you should be OK

 

[SimonJohns]

Swap the valves over and you should be OK

Can't be done on this style. It's all integral

 

[PlumbBobBob]

have to swap pipes round or change under floor

 

[GillmarB]

Thanks to Simon anD WHPES - They do a crossover valve which might do the trick so all your information has been very useful - thanks to all