Re-Wiring Boiler Programmer - Expert needed - Pics Included!

[tome87]

Right I'm modernising my Kitchen, I have an old grey boiler programmer that I'd like to swap to my new programmer.

My old Programmer is a Potterton EP2002
My new Programmer is a Honeywell ST9400C

I read on a forum that it is possible to change over, however I didn't realise so many wires were involved! So here are some pictures:

Old Back Plate:

Old Programmer - rear of:

New Programmer - Rear of:

Wires:

Anyone any ideas? I'd appreciate any information!

Thanks in advance!

 

[ianmcd]

its not as straight forward as you think as the EP2002 can be used as a wiring centre and your new one cant you might be able to use terminal strip and cram everything into the recessed box

 

[Dan Robinson]

Oh dear....



Link the B's together again and the C's also.

N's and L's should be obvious.

1, 3 and 4 are the same on both clocks, so it is only the L-5 wire that needs to be lost.

 

[tome87]

Oh right cool, so I don't need 5 at all? It was only linking to N anyway?

So B's together and pushed into backbox
C's together and pushed into backbox
N to N
L to L
1, 3, 4 is 1, 3, 4 on new programmer
and remove link from 5 to L

Thanks!!

 

[Dan Robinson]

Oh right cool, so I don't need 5 at all? It was only linking to N anyway?

NO!!!!!

It went to L

remove link from 5 to L

That's the puppy.

 

[tome87]

Thanks very much!

I might swap it today!