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MJB5373

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Rob Foster told me about this forum, so here I am! I’m a capable all rounder with regards DIY. Worked on L60 engines for my sins so will have a go at most things. Signed up today, so Hi and thanks for having me!

I’ve got a quick question that might sound barmy but here goes... I’ve got a WB 35cdi Classic plus polypipe UFH wet system. Both are connected separately via two Nest Therms.

Here’s the question: should the UFH be able to fire up the boiler independently? Currently only works if I set the boiler to heat the rest of the house?

Cheers for any help you can give, Mark
 

king of pipes

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You should indeed be able to set each heating circuit nest thermostat individually Shaun Corbs is you man for wiring issues welcome to the Forum . Kop
 
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MJB5373

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Many thanks - best get the plumber or spark back, Cheers again
 

ShaunCorbs

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hello and welcome

sounds like its not separated with port valves (s plan the system)
 

ShaunCorbs

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yes please boiler and below if theres pipework there also ufh manifold pics
 
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MJB5373

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Here’s the photos on my system. The Nest Heatlinks go into a junction box, which is pretty busy. The bottom heat link works just dandy and fires the boiler. The top one operates as it should but doesn’t call for fire; I think the wiring isn’t right I think? Would it help if I took the heat link cover off and photo them too? Thanks again

F5142577-14C6-4085-8FAA-6C3331B5C9D5.jpeg

F9826CD1-CFCD-42BD-9F9A-FDF891C63504.jpeg

31CEC888-4A36-4041-B5B7-221D0CEAFA85.jpeg
 

king of pipes

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At a guess it is a wiring issue, if one of those zone valves goes to the under floor heating ? you have everything you need there to work each circuit separately. Shaun should be able to help you out with a diagram . Regards kop
 

ShaunCorbs

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Wired wrong or bad port valve out of the box

upload_2019-5-27_11-20-8.png

Ignore the hw marking on the second port valve

That’s just for your heating side
 

ShaunCorbs

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Now?

7A3767D0-0D17-4768-BA14-FE8307DDAD62.png
 
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MJB5373

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Thanks for that Shaun...I’ve attached photos of the nest heatlinks just in case something totally crazy to view. The junction box is like spaghetti junction so pointless. I’ll put that diagram in front of the plumber as soon as he rings me, let me sort it out. Thanks again for your support! Very grateful

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