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Yes, the Rayburn cooker/oven heats the water too. There is an ?indirect circuit which is linked to the central heating system and this works on gravity if the central heating is off. Thanks for your help.

I have just tried this. The ch pump comes on on the Heating Channel but the boiler comes on on the Hot Water channel. Should the Rayburn live go to position 4 (- with the pump live)? Thanks

Thank you both Yes, Rayburn oven is on most of the time with its own on/off/heat setting control on the Rayburn. The ST9400C is just as a timer to control the central heating on the Rayburn and pump. Thanks

The old switchmaster 300 that worked as a timer on my gas Rayburn is broken and I want to replace it with a Honeywell st9400c using just one of the channels. At the moment apart from the earth wires,there is the live and neutral feed fro the mains spur, then the live to the ch pump and Rayburn...