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  1. N

    another Changing old timeclock on c.heating at home

    installation manual states that when used to control a fully pumped system the link must remain in situ?
  2. N

    another Changing old timeclock on c.heating at home

    the new one has them on but the old one dose not have any on
  3. N

    another Changing old timeclock on c.heating at home

    Hi my son has an horstmann 424 gem time clock I am wanting to put in a centaurplus c27 in it's place It is a fully pumped Y-plan system in the replacement guide it say's there is a (number)9 wire that should go to terminal 2 in new clock. however there is no number 9 wire in this 424 gem...
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