S Plan Plus - Wiring Diagram

[stevo23777]

Hi Guys

I currently have a combi boiler with a single prog stat wired direct to the boiler. I am putting in UFH in my kicthen diner and have to zone off using an S Plan Plus config. I have a Worcester Bosch boiler. I have drawn up the attached wiring diagram, would anyone be able to verify if I have made any drastic mistakes (I don't have a HW cylinder).

Many Thanks

 

[telectrix]

looks OK to me, but i,m not 100%. wait for a couple more posts.

 

[stevo23777]

Hi Please find updated diagram, (correctly changed returns from zone valves to be orange), also the UFH system has a manifold mixing pump, I have added it here at the point the stat engages, I thought about adding on the switch live return from the UFH zone valve but this would mean the pump would also engage if the CH came on also, am I right in my thinking?

 

[stevo23777]

Hi All

I have updated diagram changing colour of wire on switch return from zone valve to orange as it should be; I have also added the UFH manifold mixer pump, I am running it off the UFH stat switch live so it should kick in when the stat fires, is this correct?

 

[Leesparkykent]

Deleted

 

[Leesparkykent]

Hi Guys

I currently have a combi boiler with a single prog stat wired direct to the boiler. I am putting in UFH in my kicthen diner and have to zone off using an S Plan Plus config. I have a Worcester Bosch boiler. I have drawn up the attached wiring diagram, would anyone be able to verify if I have made any drastic mistakes (I don't have a HW cylinder).

Many Thanks

Two port valve= grey permanent live which connects to LS on boiler, brown Connects to SL (A1)of thermostat and orange connects to LR of the boiler.

 

[stevo23777]

What about the manifold mixing pump, should this connect to SL(A1) also? I guess if it is on LR circuit it will engage when central heating is also which would ne a no no.