Replacing Potterton controller with Honywell ST9400C

[bobe70]

Hi all,

I am updating me CH / HW controller from a Potterton EP2000 to the Honeywell ST9400C, but am having issues working out the wiring...

The Potterton has 7 connections (plus the earth) and the Honeywell has 6 (plus the earth).

This image shows the wiring guide for the Potterton and how my system is currently installed -

//media.diynot.com/211000_210536_71354_99981578_thumb.jpg

//media.diynot.com/211000_210536_71353_38139569_thumb.jpg

And this is the wiring requirements for the Honeywell -

//media.diynot.com/211000_210536_71355_47128977_thumb.jpg

Could you wise / experienced members give me some advise on where the wires need to be relocated to accomodate the Honeywell?

Thanks,

Bob

 

[bobe70]

These photos should be easer to see!

Untitled

• bobe70
• 6 Jan 2014
• 1

Untitled

• bobe70
• 6 Jan 2014
• 1

Untitled

• bobe70
• 6 Jan 2014
• 1

 

[Boilerman2]

Easy!

Remove and discard the red wire connected between "L" and "5",
it is not needed with the Honeywell - then just swap over the remaining wires like for like L,N,1,3 & 4 I dont know what those loose wires are in your picture though!!

 

[bobe70]

Sounds simple enough!

You mentioned placing the remaining wires like for like, you do realise that there is nothing connected to terminal 1 right?

I assume this is fine and terminals 1 and 2 are just used to break the circuit?