New Boiler Timer

[copernicus]

I have replaced my EP2002 timer with an EP200. The EP2002 backplate had 5 connections with terminals 1 and 5 linked. Yellow and Red wires on terminals 3 & 4 respectively (nothing on terminal 2).

The new timer only has 4 connections where the yellow wire goes to terminal 4 for CH and the red wire goes to terminal 3 for HW.

Do I need to link any of the terminals as I think that the HW is by passing the motorised valve and causing the radiators to get warm.

Any ideas on this???

 

[Whitespirit66]

Are you saying that you have replaced the Potterton EP2002 with a Salus EP200?

What system have you got, is it fully pumped with 3 port valve?

 

[copernicus]

Yes, replaced the ep2002 for an ep200. Fully pumped system but maybe two port valve. Is there a difference on the wiring?

 

[MrGassafe2011]

See below :

N = Neutral
L = Live
1 = HW OFF
2 = CH OFF
3 = HW ON
4 = CH ON
E = Earth

Hope this helps !