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  1. K

    Replacing a Drayton SCR (RF) with a Horstmann RF unit

    Fantastic... Many thanks for your help Karolos
  2. K

    Replacing a Drayton SCR (RF) with a Horstmann RF unit

    Hi there, thanks for the reply. The Horstmann unit simply says RF Programmable Room Thermostat. The Boiler/ Receiver unit has 5 connections... N - L - NC - COM - NO. It also has a link between L and COM fitted out of the box. I have the mains connected to Neutral and Live(N & L). I have two...
  3. K

    Replacing a Drayton SCR (RF) with a Horstmann RF unit

    My Drayton Digistat SCR has failed and I have bought a Horstmann RF Programmable Room Thermostat to replace it but the wiring to control the boiler is a little confusing. The Drayton wiring uses four connections Live and Neutral, and C- connection 1 on the SCR unit (presume that stands for...
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