Underfloor Heating - connection to bolier

[stevo23777]

Hello All

I have purchased a single room underfloor heating solution from Solfex. It comes with: 3 circuit manifold, manifold mixer with pump, 2 port motorized valve, room stat plus the boards and pipe.

What I am unsure of however is how his connects to my single zone (all house rads, no HW tank) combi boiler. I want the UFH to run independently from my radiator central heating.

Can anyone help me with this?

 

[Riley]

Underfloor heating is a pretty specific science mate. I would be more inclined to get someone in who has installation experience. To answer your question though, in simple terms you will have to zone your property and wire it accordingly with the correct temperature management controls ie zone for heating and zone for ufh

 

[Unregistered]

Hi Riley, thanks and I appreciate what you are saying, and indeed it is being fitted by a plumber. However my kicthen fitter is handling all the trades and I like to ensure my knowledge is at a level that I can converse with him on issues. I know that I need to zone the UFH, however is this just a case of fitting a 2 port zone valve and connecting this feed to UFH? Also where would the UFH stat be wired to? I'm guessing the wireless timer/stat I have now for CH is direct to the boiler and fires up the CH when required. I can't work out how the UFH 'call' the boiler on a different time programme?

 

[Riley]

The ufh essentially should have all its own wiring. Thermostat and possibly programmer. These would need to meet at a wiring centre with the zone valves and the existing controls for the boiler.

 

[stevetheplumber]

to keep it seperate you will need two motorised valves the underfloor one activated by the stat in that room and the other activated by the normal room stat
if you want to time it seperately you will also need a two channel programmer which will replace any integral clock in the combi
without a motorised valve the ufh will come on even if the ufh pump isnt running

 

[Dotty]

Hi Riley, thanks and I appreciate what you are saying, and indeed it is being fitted by a plumber. However my kicthen fitter is handling all the trades and I like to ensure my knowledge is at a level that I can converse with him on issues. I know that I need to zone the UFH, however is this just a case of fitting a 2 port zone valve and connecting this feed to UFH? Also where would the UFH stat be wired to? I'm guessing the wireless timer/stat I have now for CH is direct to the boiler and fires up the CH when required. I can't work out how the UFH 'call' the boiler on a different time programme?

If you're looking to converse at the same level as a kitchen fitter you should really aim a lot lower...

 

[Unregistered]

Thanks guys, very helpful. One more question, so if you take the CH flow pipe, split it into two, one to the existing CH loop and one to the new UFH manifold and place a motorised zone valve on each pipe, do you re-wire the exiting stat/timer to the first zone valve and the new stat/timer to the other valve? Also is it then just the 'request' for hot water by opening the valve and the pump pulling that fires up the boiler and if this is the case how does the existing CH work as the pump is internal to the boiler?

 

[SimonG]

It will be an S Plan plus system.

 

[stevo23777]

Even if I have no cylinder?

 

[Riley]

Yep