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Replacing Satchewll TLX 2259 Room Thermostat

Discussion in 'Plumbing and Central Heating' started by steveg2, 28 May 2008.

  1. steveg2

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    Hi,

    I am replacing a Satchwell TLX 2259 (Dial operated) with a Sunvic TLX7501.

    Am I right in the fact that Sunvic took over Satchwell as all forum searches seem to point to the Sunvic TLX 2259 ?.

    The TLX 2259 has yellow - terminal 1, red - terminal 3 and blue terminal4.

    The TLX 7501 has terminal 1 - OFF, terminal 2 - ON and terminal 3 - C.

    I am bit confused with connecting to the new terminals and I was wondering if anyone could help me please.

    Thanks
     
  2. andy212

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    Hi the tlx 7501 has no neutral so you conect red to terminal 3 and yellow to terminal 2 and make safe the neutral in conecter block.
     
  3. steveg2

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    Thanks for the information, it has been installed and working fine.
     
  4. McToon

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    Hi,

    I'm also trying to replace a Satchwell TLX 2259 with a Sunvic TLX 7501.

    On my set up I have 3 wires coming out of the wall. An earth attached to the back plate, 1 Red and 1 Black each attached to a terminal on thermostat. The difference for me is that there is an additional electronic component (with markings: Z5U, 01Z, IKV) linking the 2 terminals Red and Black.

    I've tried simply connecting Red to 3 and Black to 2 on the 7501, but it doesn't work!!!

    Do I need to link them with this extra component???
     
  5. spikboy

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    Hi,

    To add to this (I have just joined and fully intend to use this forum properly) I have a satchwell tlx2259 and want to replace with a sunvic 7501. The issue I have is that the current config on the Satwell is Blue wire-1, Brown wire-3 and the yellow/green is made safe.

    This seems incorrect to me in terms of best practice?
     
  6. spikboy

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    I used my brain a little harder and connected Brown to C-3 and Blue to 2-on. all good now.
     

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