Potterton Ep2002 wiring

[datacollector]

Can anyone help?

I am replacing an old EP2002 with a new Drayton LP522, on a gravity fed, pumped HW system. The potterton back plate has the following wiring connections.
A,B,C,D N L 1,2,3,4,5,

I Have connections to D = B,BR L,N, 3,4,5.

What do I connect the Existing D wires to on the new Drayton, and what are they? and what is 5 ?

The new back plate only has N,L 1,2,3,4. and of course earth.

I can only thing that D is the room or tank stat.

can anyone put me right?

 

[D_Hailsham]

You will have to find the other end of each wire and post what it is connected to.

 

[waterworks]

Hi connect the wires which went to D to a connector block, not to any connections of new programmer.

Connection 5 on old programmer usually had a link to connection L, so if you had any wires connected to 5 and a link to L then connect them to L, if you had wires connected to 5 but no link to L then connect them with a connector block and not to any connection of new programmer.

 

[kirkgas]

if this isn't sorted yet i have a brand new EP2002 with wiring instructions if that would help identify what goes where

 

[petit_pablo]

Good luck i hate changing these clocks.

Your going to have to make space somewhere for the extra connector blocks as i doubt they will fit behind the new clock.

 

[datacollector]

Many thanks to those who took the time and effort to reply.

After stripping the old gear out and spending several hours looking at what was left I suddenly had a eurika moment and did what "Waterworks" has suggested (albeit before reading his advice. I'm impatient like that) .

And all is working well.

Again, many thanks.