Help with a two zone system

[ajwestaway]

Hello all, I'm a keen and competent diy'er in need of some help and advice, i have installed underfloor heating in our extension, i have laid the pipes, and fitted the manifold, now it gets more complicated http://www.*******************/images/smilies/icon_exclaim.gif I would like to create a 2 zone system in our house, one zone for UFH and one for the Rads. I understand that i will need two x two port valves, one for each system both controlled by a independent thermostat. Now this is where i am lost, our UFH Manifold is situated around 10 meters from the boiler, so my first question is where to install the valve ? i am guessing i should Tee of the flow by the boiler and insert both of the valves next to the boiler, but i have seen advice that says to install the 2 port valve next to the manifold, after this i am on to the electrics which are really really confusing, again i understand there will need to be two control boxes, one for each system, would that mean i need to run a cable from the UFH two port valve to the control module next to the manifold and then a second cable back to the boiler ? thats a lot of cable if i place the two port valve next to the boiler. I really would appreciate some help, this project has brought me close to tears !! Cyber pint to anyone that can help, http://www.*******************/images/smilies/icon_razz.gif

 

[Scott_D]

2x 2 ports on the flow under the boiler
Don’t forget an auto bypass to the return
Probably an additional expansion vessel

 

[ajwestaway]

Many thanks for that info, could you advise me what the auto bypass is used for ?

 

[Chuck]

You need to upload the image(s) to this site so we can see them. (Links to external sites aren't permitted brcause they aren't guaranteed to be permanent.)

 

[Scott_D]

If both valves close but the pump still runs it needs a route back to the return