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programmable digital timer

  1. B

    Replacing failed Danfoss 103 timer

    Hi, My flat has an old pumped central heating and gravity hot water system controlled by a Danfoss 103 electric-mechanical timeswitch. [Correction from ianmcd, below: It is not gravity HW. It is an open vent system with pumped HW]. No room thermostat. Hot water and heating cannot be switched...
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    • Thread
    • central heating danfoss 103 hot water programmable digital timer programmable room thermostat pumped roomstat single channel thermostat vented
    • Replies: 22
    • Forum: Plumbing and Central Heating
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