Upgrading central heating programmer

Nov 18, 2005 2 Replies
T

I want to replace my existing electro-mechanical Horstmann Diadem 425 hot water and central heating programmer with the more modern Horstmann Channel Plus XL H21 electronic programmer. Will I have to do any rewiring or will it be a straightforward shoe-in substitution? Horstmann says the backplates are compatible.



Steve


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R

You might need to move a wire or two but the details are in the instructions or here:

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T

Thanks, Rob, those instructions allow me to check current against new positions for wiring, should any be needed.

Steve

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