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28i RSF and Wireless Towerstat RF ( Selectable Volt Free )

Discussion in 'Plumbing and Central Heating' started by lucky1313, 28 Feb 2011.

  1. lucky1313

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    28i RSF and Wireless Towerstat RF ( Selectable Volt Free )

    Hi

    I am trying to fit a Towerstat RF wireless thermostat to my old age boiler a 28i RSF, this is the old grey one with only a mechanical timer unit rather then any thermostat.

    I have found a guide that mentions the CM907

    http://www.diynot.com/forums/viewtopic.php?p=823347#823347

    but i'm not sure what the equivelent AB connections are on the Towerstat

    Can any help ?
     
  2. lucky1313

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    Here is the wiring guide for the Towerstat RF, the cable layout is on page 10

    Please login (registration is free!) to view this link.
    http://www.grasslin-controls.co.uk/assets/graphics/static/STT%20RF.pdf


    Many Thanks[/img]
     
  3. lucky1313

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    Here is the wiring guide for the boiler

    Please login (registration is free!) to view this link.
    http://www.grasslin-controls.co.uk/assets/graphics/static/STT%20RF.pdf


    Page 3 of the Timer Switch PDF
     
  4. mikely

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    Connect the Towerstat as per the volt free switching diagram on page 10 of the Towerstat manual (link wire removed). Connect ‘Live from load’ to boiler RL (X2 terminal block), ‘Switched live output’ to boiler RI. Also connect live and neutral to the Towerstat from CL and CN terminals.
    See boiler installation manual Fig 12 and 13 here: Please login (registration is free!) to view this link.
    http://www.grasslin-controls.co.uk/assets/graphics/static/STT%20RF.pdf
     
    • Thanks Thanks x 1
  5. lucky1313

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    that's excellent thanks and all sorted now :D :)
     

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