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    Wiring Diagram for Older Style Landis & Gyr CH Thermosta

    Hi D Thanks for persevering with this query - you're probably as fed up and mystified by it as me! It's a Drayton wireless Digistat RF3 programmer. In answer to your queries, the wiring runs into the connector strip from the following : Pump Brown - 1 - Red to/from boiler Pump Blue...
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    Wiring Diagram for Older Style Landis & Gyr CH Thermosta

    Can you confirm that it is one strip and that each top terminal is connected to the corresponding bottom terminal, i.e they share the same brass connector inside the strip. Yes, that's an accurate description! Description of wires to terminals: (no numbering on the strip, so I've added...
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    Wiring Diagram for Older Style Landis & Gyr CH Thermosta

    Thanks for the link to the boiler manual. There is a thermo on the side of the HW cylinder. It's set at 55 C. The lever on the 3 port valve is 'locked' on the auto position. The wiring from the old room thermo leads up the wall and into a blanked off terminal box inside the airing...
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    Wiring Diagram for Older Style Landis & Gyr CH Thermosta

    Thanks D! I have a Saunier Duval Xeon 80ff boiler (approx 3 years old). It isn't a combi boiler. A Drayton Digistat RF3 and a Danfoss 3 Port Valve HSV3 is fitted. I'm wondering if it was coincidence that when I disconnected the wall thermostat yesterday the boiler stopped supplying...
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    Wiring Diagram for Older Style Landis & Gyr CH Thermosta

    Help please! I have an old brown box style thermostat on the wall in the hallway. I thought it was redundant as I had a new wireless thermostat fitted to a new gas CH boiler a few years ago. Today I disconnected the thermostat wiring and my CH boiler has stopped working (apart from...
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