Y plan & Underfloor Heating

solarsparks · Feb 19, 2011

Hi All - First post,

I'm an electrician that has been asked to connect the wiring up for a UFH system he has installed himself. His current system is an open vented Y plan with pump overrun from the boiler.

He would like the UFH to be controlled seperatley from the existing rads. The UFH is in a garage conversion where the bolier is also located.

I'm trying to establish 2 things. A) he has installed the UFH correctly for his needs. B) a wiring diagram for the electrical connections.

His install includes a manifold and pump located under the boiler. A 2 port valve close to the boiler in the roofspace above. I'm no plumbing expert, but it looks as though he has connected into the system on the main flow and return.

I've had a quick trawl about, and it seems Y plan is not the most suitable for his needs?

Could someone tell me if it looks like he has installed this correctly? If so, does anybody have a wiring diagram?

Any help appreciated - thanks
solarsparks

stevetheplumber · Feb 19, 2011

y plan isnt very flexible it will be easier to modify an s plan cant realy understand the layout from your description post a drawing maybe ?if the ufh isnt on a seperate run it will not be possible to run it seperately as rads before any valves will be un controlled

Toddyplumb · Feb 20, 2011

If the 2 port is T'd B4 the 3 port it would work given the right controls . My choice is as previous S plan

ecowarm · Feb 20, 2011

Can you post any pics?

solarsparks · Feb 20, 2011

Thanks all for the replies - appreciated.

I can't give any pictures because I haven't got access.

I can confirm he has installed the new 2 port valve to the flow near the boiler before it gets to any rads.

After my surfing I came to the conclusion he should convert to S plan so I've advised him to get a heating engineer involved. Probably lost the work now, but rather that than guessing and making the system dangerous.

Thanks again - solarsparks