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sundial rf2 pack 2

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    How to replace Sangamo Choice PR2 with Sundial RF2 Pack 2?

    Hi all, Would very much appreciate some help here. We've moved to a new property that has a Grant Euroflame 70/90 oil-fired boiler and a Sangamo Choice PR2 two-channel programmer with cylinder stat but no room stat. The Sangamo has a standard backplate with a black wire for HW=ON (t3) and a grey...
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