WB FS30 CDI 4 Zone Wiring help

[redapple]

Hi

I was hoping I might be able to get some help with my wiring center.
I had the following setup:
-Very Old E-type Boiler
-4 zones, ( DHW, Ch1, Ch2, Ch3)
- 4 Channel Programmer
- Unvented Cyclinder
- Grundfoss pump selectric
- 3 thermostats for each of the Ch's (Salus RT200 no neutral connection required, Just SL and L)

System was working fine no problems. But I recently had to get my boiler changed as the old e-type died.
I decided to replace it with a Worchester Bosch 30CDI Floor Standing Boiler. The Plumber who was recommended by a friend installed the boiler and everything went OK, apart from a few location hiccups ( He is Gas Safe checked his number out). After installing the boiler and checking that it worked he also installed a new Grundfoss Alpha 2 15/60 pump. Heated up the cylinder and rads no problems.

But when he opened up the junction box to do the wiring he got afraid as the wiring was like a plate of spaghetti, with wires
connected to separate connector blocks instead of one terminal strip with no labeling. He said he would not be able to do the wiring. I have tried to contact the original plumber who wired the system up but have not been able to get through to him.

I am not bad with electronics thought I would have a go at wiring it up. I labelled everything and here is is what the original wiring looks like: Connector block 5 is the boiler to pump connection which is not shown.



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I would like to create one terminal strip to make life easier. Here is how I would rewire it. I have not included the cylinder stat connection or DHW valve and Programmer Com 1 connection as I not sure it all goes together or another connector block is required.



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Any help would be much appreciated.

Thanks

 

[Mike Jackson]

Looks straight forward enough to me in the first wiring diagram. All it needs is LS to terminal 1. NS to terminal 7, LR to terminal 6 and the earth to terminal 15.

 

[redapple]

Thank you, followed the instructions edited my second picture with the terminal strip. Here is what it would like is this right?

 

[Mike Jackson]

That looks right. An S plan is one of the easiest systems to wire.

 

[redapple]

Wired everything up today , it fired up and all zones and DHW working fine with programmer plus room stats.
I think it was the S plan with the LS NS and LR connections that had me confused, as every other plan I looked for has just a live connection coming from the boiler or from the mains.
Thank you very much for the help, hopefully the diagram will help someone else who zoning with a WB boiler or similar connections. 🙂

 

[stevetheplumber]

better man than me i would have used two boxes at least to make fault finding easier in future plus getting that many wires into one terminal isn't easy to work with

 

[Mike Jackson]

Wired everything up today , it fired up and all zones and DHW working fine with programmer plus room stats.
I think it was the S plan with the LS NS and LR connections that had me confused, as every other plan I looked for has just a live connection coming from the boiler or from the mains.
Thank you very much for the help, hopefully the diagram will help someone else who zoning with a WB boiler or similar connections. 🙂

Thanks for getting back to us. It's nice when someone lets us know how they've got on.