Wiring a Drayton Digistat SCR to a Drayton LP522

[simonft]

Hi im after a little help
I want to wire in a Drayton Digistat SCR to a Drayton LP522 programmer for the Central heating current programmer wiring is shown below , I understand the L N & earth wiring from the LP522 to the SCR its just the heating wiring Im stuck on, thanks Simon

 

[CBW]

If you have a conventional boiler, which it appears you do, then it should be wired at the wiring center.

 

[simonft]

Chris its been wired into a Worcester Bosch Green star Heatslave oil combi by the installer, its in my elderly mothers house with no wi fi eatc or else would have gone down the hive route

 

[CBW]

What you need to do is alter the wiring, so the grey from 4 on LP522 goes to the common of the digitstat and then the heating on from thermostat goes to the LR at the boiler.

 

[simonft]

Thanks Chris got it

 

[ericmark]

The LP522

and the SCR

need the N and L connected in parallel i.e. L to L and N to N, and the wire from 4 on the LP522 goes to 1 on the SCR and a wire from 2 on SCR to 4 on the LP522 in other words in series.

 

[ianmcd]

4 on the LP522 goes to 1 on the SCR and a wire from 2 on SCR to 4 on the LP522

Wrong terminal 2 on the SCR is not used

 

[simonft]

Wrong terminal 2 on the SCR is not used

Thanks Ian i realised it should be terminal 3