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    Replacing Honeywell ST9420C to the Nest Heatlink

    Thanks for the tips. It’s a Nest system from a recent move, so I’d like to keep the status quo. Sorry the link didn’t work. What cylinder stat do I need?
  2. N

    Replacing Honeywell ST9420C to the Nest Heatlink

    Hi all, I think I’ve got the general idea about wiring up the heat link. My question is: What’s the story with controlling the hot water cylinder temp. It’s currently fitted with the Honeywell hot water RF kit, which I guess is all connected through the current programmer? Only single port...
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    Nest 3rd gen heat link wiring connections?

    PullerGas, Looking at doing the same. Honeywell controller etc. My question is, how do you control the hot water temperature? I’ve got the Honeywell RF hot water kit installed on the cylinder. Thanks for any help.
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