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    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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