Vokera Easiheat i25c opentherm

[AndyJ73]

Hi all, I have a Vokera easiheat i25c boiler and I am currently trying to swap out my draytin timer for drayton wiser controls. The issue is have is that when wiring it as per manual I am not getting opentherm control. I am.womdering if there is any steps I am missing to get this to work. I have attached pics pic of my boiler its board and wiring diagrams to see if it helps. Thanks Andy

 

[CountryFan]

Was the previous thermostat removed? Have links been removed? @vulcancontinental is likely your man for this.

 

[AndyJ73]

Previous was just a timer and it was fitted to terminals 1+2 where the bridge can currently be seen. Bridge has been refitted just to enable use of boiler while I sort the issue.
The bridge is vokera original just refitted.

 

[vulcancontinental]

I don't have mAnuals here but look at parameters, one, I think in the 7's group will be enabled/disabled OT, that needs to be 1.

 

[AndyJ73]

Thanks, I'll try that tomorrow. Just to check I'm reading it right opentherm is terminals 2 & 4?

 

[AndyJ73]

803 was the parameter i believe. Set to 1 from 0

 

[vulcancontinental]

Password is 53

 

[AndyJ73]

No luck with that. Not sure if wiring is incorrect the stat isn't compatible or there's a bigger issue?

 

[vulcancontinental]

This is on my easiheat-i in the training room, polarity unimportant.

 

[AndyJ73]

Thanks for that, much appreciated. Wired that way works. Not sure if manual.is wrong or if it SHOULD work when wired the way in the manual but that way works when others didn't.

 

[RandomGrinch]

Thanks for that, much appreciated. Wired that way works. Not sure if manual.is wrong or if it SHOULD work when wired the way in the manual but that way works when others didn't.

I can see that this could be a bit confusing, but the picture is showing the board edge and cutouts of the PCB, it isn't showing which terminals the OT wires should go into.