Underfloor Heating + Combi Boiler Set up

[danr86]

Hi, builder / his plumber have gone awol and not installed my underfloor heating + combi boiler correctly.
I've got the underfloor heating in the kitchen and the boiler but there are no two port valves to independently control each one.
The boiler is a Worcester Bosch CD30i with a DT20 timer.
There is also a room stat in the kitchen (I believe this needs to be moved to the hallway) and the stat for the underfloor heating put in its place.

Different people have said different things and Worcester Bosch weren't very helpful when I called them. I'm looking to get someone in to fix this all up but just want to be sure they are doing the right thing.

Will the CD30i + DT20 + Room Thermostat + JG Speedfit Extension Kit + Speedfit Programmer all work together and what's the correct way of wiring it all in?
I have been advised to get rid of the DT20 and just put in a wireless thermostat - is this right?

Thanks

 

[danr86]

Any thoughts peeps?

 

[Andygasman2010]

You're meant to have the rads and UFH as separate zones each with their own controller, the DT20 can only control the whole system as one zone.

I would ditch the DT20 in favor of x2 programmable stats controlling x2 2-port valves, one for the rads and one for the UFH. The only thing you'll loose is the preheat timer function. No great loss in my opinion.

 

[danr86]

So the stat for the underfloor heating is programmable so are you saying get rid of the DT20 and get something like this to put in the hallway?
http://www.wickes.co.uk/wireless-programmable-thermostat/invt/220857/

I've bought the two 2 port valves already.

 

[Andygasman2010]

Yea that'll do, two of them. I'm not familiar with the Speedfit stat you already have, got a link? What does it currently control?

 

[danr86]

It's the JGPRTE

http://www.johnguest.com/Home/literature-downloads/UK-Literature/JG_UFHRoompack.aspx

 

[Andygasman2010]

You need to follow the diagram on page 5. Disregard the red pump and optional hot water motorised valve as you have a combi. Ditch the DT10.