Y Plan to S Plan for UFH

[topman870]

Hello,

I currently have a Y plan system with a heat only boiler, the boiler is down in the kitchen and tank/pump etc is in the loft..

I am planning to have UFH heating installed on the ground floor and was wondering how much disturbance would be involved in terms to bring new pipes down from the loft, or would it be possible to directly do it from the boiler's end?

Advise on this would be greatly appreciated.

Thanks!

 

[Dan Robinson]

wondering how much disturbance would be involved in terms to bring new pipes down from the loft

or would it be possible to directly do it from the boiler's end?

Crystal ball questions..... "Dunno" is the answer. You may be able to bring it all off from the boiler end, but it depends on the configuration of the system.

One thing for sure is, that unless it is going to be a very small overlay system, you want it on its own zone. Not one of these systems that connects into the existing circuit.

 

[topman870]

Yep I defiantly want it to be it's own system with a few zone for the Underfloor heating.

Currently the flow pipe goes from the ground floor all the way into the loft then splits off after the pump into CH and HW.

 

[Dan Robinson]

If the pump is in the loft then you need to bring flow and returns back down.

How much ball ache that is depends entirely on what we can't see.

Worth changing your system to an S plan, but it is not advisable to use traditional zone valves to supply the UFH. If your installer insists on it. Change him.

 

[topman870]

Thanks for your input Dan!

As for the return pipe could this be tapped into from the boiler end? if so only 1 pipe will need to be brought down..

What do you mean by traditional zone valves? the 3 port ones?

 

[Dan Robinson]

As for the return pipe could this be tapped into from the boiler end

Its possible, but may bring up issues with reverse circulation. Unless space is crazy tight, running two pipes is not much more hassle than running run.

What do you mean by traditional zone valves

Any valve that uses a synchron motor is likely to seize and become a problem. Either don't bother at all and rely on the loop actuators or get a zone valve that uses the same thermoelectric system.

Please note - this will probably blow the mind of your average builder's plumber/mate down the pub.