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Microgyr 40 Replacement / Manual

Discussion in 'Plumbing and Central Heating' started by puppet1984, 21 Jan 2012.

  1. puppet1984

    puppet1984

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    Hi i was wondering if anyone could help.
    My new house has a microgyr 40 programmer for the heating controls and after googling for a few hours i cannot find a manual for it.
    I was wondering if a) anyone had a manual
    or b) is there anything that is a straight swap and easy to do? i'm ok with wiring things i just obviously don't want to break my heating in winter so a straight swap would be much easier.
    Thanks in advance
     
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  3. 45yearsagasman

    45yearsagasman

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  4. puppet1984

    puppet1984

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    i found that but the instructions for the actual unit state

    5. Once you have completed the above you are now ready to connect the
    RWB29 to the backplate, If the RWB29 is replacing another Landis & Gyr or
    Landis & Staefa product as listed below no wiring changes are required,
    RWB1, RWB2, RWB20, RWB40, RWB200, RWB200cw, RWB252, RWB252cw,
    RWB270, RWBXP, Gloworm Mastermind, Potterton Miniminder, Sankey
    Sunline.
    6. If the RWB29 is replacing another Landis & Gyr or Landis & Staefa product
    as listed below, these products are NOT suitable for replacement by the
    RWB29. Return the RWB29 to your stockist/installer and request the RWB27
    which will fully interface with your old units backplate.
    with the exception of the RWB3 which will require a link inserted from L to
    2 on the existing backplate RWB3, RWB7, RWB30, RWB50, RWB100, RWB152,
    RWB152cw, RWB170 and RWBXT.

    It doesn't list the microgyr 40 anywhere in there so was unsure if it would be a simple swap.
     
  5. 45yearsagasman

    45yearsagasman

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    Yes you are correct. I've just read those instructions and it is not clear, although in the sales blurb it does mention your Microgyr 40 is a straight swap. I'm confused and not sure what to advise, but my gut feeling is that it would swap OK without wiring changes. Sorry not to be more specific. There maybe someone on here that has experience of this and will advise.
     
  6. denso13

    denso13

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    Some Honeywells have the same wiring diagram as the RWB29 and state they are a straight swap with the microgyr 40. So, in a round about way, I would also say the microgyr 40 can be swapped with the RWB29 :)
     
  7. oilhead

    oilhead

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    Microgyr $), if I remember correctly, is only a single channel timeswitch. Remove it from the wiring base and look at the wiring diagram on the back. If it only shows one switch, then you need a RWB27.
     
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