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Discuss Puzzled....please help! in the Central Heating Forum area at UKPlumbersForums.co.uk.

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  1. Kenneth Ross

    Kenneth Ross New Member

    My first request for help.

    I'm replacing a Drayton Tempus Seven with an LP822. Old wallplate not compatible, but not a problem - can change.

    What puzzles me is no connection to pins 1 & 2. Just checking this is normal?

    Really appreciate comments / explanation.

    TIA.

    15392551807087815559743300347587.jpg
     
  2. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    You wont need them , look on the back of the programmer it should tell you what 3 & 4 do , back plate looks burnt out anyway .
     
    • Like Like x 1
  3. Kenneth Ross

    Kenneth Ross New Member

    Thanks, Townfanjon. Yeah, they were burned, so new backplate fitted. All appears good!
     
    • Like Like x 1
  4. Last Plumber

    Last Plumber Plumber GSR

    upload_2018-10-11_18-53-34.png
    Normally, this is what three and four are for.

    It depends on the system whether you need anything else.

    If you do not feel 100% confident, I would recommend getting a Heating Engineer or Electrician who does a lot of Heating control wiring.

    Do you know what type of system you have?
     
    • Like Like x 1
  5. Kenneth Ross

    Kenneth Ross New Member

    Many thanks, 'Last Plumber'. It's a pumped CH / HW system dating back to 1991, with the original Ideal Mexico RS60 still in service - Got a gas safety certificate on it 4 months ago, and I was only changing the controller because the LCD had failed. All fixed, all good :)
     
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