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Recent content by stevesherman

  1. S

    Horstmann HRT4-ZW installation help required

    Hi I am trying to replace my ageing Drayton RTC Thermostat with a newer wireless thermostat (Horstmann HRT4-ZW) but having difficulties trying to work out the wiring required. My exiting Drayton room thermostat has 4 wires in total: 1 green (earth) 1 yellow 1 blue (neutral?) 1 red I...
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