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it could well be the 65 actually, sorry not got the number to hand, but im sure thats what it is, a small commercial boiler.

yeah it is a small commercial boiler. bit of an overkill apparantly.the hot water goes through a timeclock and then through a smartline cylinder, it then opens the valve as it should do and a sw live is going on to the boiler control panel but it just doesn t fire up.

yeah the oranges of the valves are together and they both bcome live when hw is selected and when ch is selected, they then make the sw live to the boiler live but for some reason it just doesn t fire up when hw is selected even though there is 230v on terminal 4 at the boiler. as far as i can...

Im an electrician, recently wired an s plan central heating system for a ecotec 656 system boiler.The boiler fires up perfectly when ch is selected via the room stat but doesn t fire when hot water is selected even though the two port valve is working fine and the switch wire back to the boiler...

im an electrician, recently wired an s plan central heating system for a vaillant 656 ecotec system boiler. The central heating works fine and the boiler fires up when the room stat calls for heat, however the hot water is not firing up the boiler even though the two port valve is working as it...