Drayton SCR installation

30 Sep 2013
Reaction score
United Kingdom
I am looking to change my current Siemens RDJ10RF for a Drayton Digistat +3RF Room Thermostat. However, I am struggling to understand how to wire the SCR for the Drayton. I have 3 wires coming from my boiler system which go into the Siemens model - live, neutral and call. Obviously I know where the live and neutral go into the SCR, but I am not sure about the call wire. The SCR has ports 1, 2 and 3 - it looks like 2 isn't used, but what about 1 and 3. Am I meant to have 4 wires instead, will I not be able to wire the Drayton SCR with just the 3?
Any help would be great!
Below is the diagram for the Drayton SCR
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local