Should the CH flow warm when running DHW?

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Hi,

I think the question is self explanatory....

The boiler is a Sime Super 90 Plus combi. It has a brand new diverter valve. When the CH is switched off and the pipes are cold, if I run the DHW until it warms up, the CH flow pipe also warms - is this right? Or is my new diverter valve faulty?

Thanks,

Bob
 
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So, is this right? Is it natural that my CH flow pipe warms up, or should it stay stoney-cold?

Bob
 
Should stay cold. There might be an overrun when hw drawoff stops, which would heat the ch pipe but not for long.

Could be some dirt in the dv.
 
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Thanks Chris,

There is definately something wrong then.... from cold, when I run the DHW the CH flow pipe heats up more than the DHW one!!!! And the diverter valve is only 3 weeks old!

If dirt is the cause, is this valve something which can generally be taken to bits to clean? Whilst I've (obviously) never done this before, I fitted the valve myself so am happy to have a go.

Out of interest, when you install a new dv, is there any configuration to do or is it just plug and play?

Thanks,

Bob
 

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