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  1. I

    Sunvic TLX 9201 analogue thermostat to honeywell THR840DUk

    sandvic = sunvic natural = nutural
  2. I

    Sunvic TLX 9201 analogue thermostat to honeywell THR840DUk

    can anyone offer me some help on changing a Sunvic TLX 9201 analogue thermostat to a honeywell homexpert THR840DUK digital thermostat, the sunvic is wired up on a s plan plus system, upstairs and downstairs zoned heating via 2 port valves and a 2 port valve controlling the hot water. current...
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