Low loss header connection Inc pump to unvented system

[damo]

I am fitting my first low loss header onto an unvented system including ufh and 300ltr tank. I have picked the job up after the ufh has been layer, tested and screened over. All I have to work with is the manifold with flow and return pipes and pre installed rad circuit all of which feed into the garage. I know how to set up the unvented system with zone valves, iso's, prvs etc but not how to and where to include the pump and how to wire it up and the arrangement of the low loss header.
Any advice would be great.
I will be installing either Worcester or viessmann.

 

[king of pipes]

I wouldn't fit eithier mate i hate plastic hydroblocks , valliant is hard to beat what you see there was 2k labour theres alot of pipework behind that wall and a cloak room gas supply in 28mm gas tite pipe . Kop

 

[ShaunCorbs]

I would go Viessmann’s depending on budget 200 series

 

[Scott_D]

I did one similar recently a tight install in a utility room so as Shaun said I 4 piped it, have a look at oso unvented cylinders all connections are on the top so makes a clean tidy install .

Do you think the 4 pipe setup saves enough time/materials to cover the extra expense of the boiler?

 

[king of pipes]

I designed it all mate but my customer was insistent on a Valliant so went with it, i guided them towards the oso cylinder though for ease of fitting . 😉