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

tsc wrote:
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.


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

http://www.tlc-direct.co.uk/Technica...mann/Index.htm

Cheers

Rob

"Rob Summers" wrote in message
...
tsc wrote:
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.


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

http://www.tlc-direct.co.uk/Technica...mann/Index.htm

Cheers

Rob

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

Steve