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  1. P

    Central Heating Controller Change

    Why is Neutral not required? The Stat is a mains powered one.
  2. P

    Central Heating Controller Change

    Red = Live Blue = Neutral
  3. P

    Central Heating Controller Change

    Looking to replace a Honeywell T40 with a Sunvic Select 107XL. The Honeywell has the following connections: Earth - green/yellow wire 1 - Red wire 2 - Blue wire 3 - Yellow wire The Sunvi has: N L 1 - Com 2 - Off 3 - On 4 Which colours go where on the new Sunvic? Thanks
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