My central heating timer has just stopped working, so I'm going to replace it. It's a very old Randall 30 20 (mechanical type). I've picked up a Drayton Tempus One, but I can't figure out which wires to connect to which terminals on the wall plate. Anyone got any clues as to how to wire it up?
Thanks
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The problem isn't so much the connections on the new controller, it's figuring out what the connections on the old controller are so that I know where to connect them to the new one.
You'll have a live and a neutral feed which should be easy enough to find - they'll be directly connected to the motor (or find live with a mains tester and neutral because it's hopefully paired with the live). Then you'll have a neutral outlet and one or more switched live outlets
- you can probably identify these by holding a mains tester to each wire in turn and turning the switch to see whether/when it becomes live. Don't get bitten :-)
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