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    RWB9 Connection issues to Potterton Suprima HE

    Hi, Changed old clock style timer (seperate HW/CH) for a RWB9 and thought I'd copied the wiring without any issues, all seemed to work ! This was until the warmer weather, when we only wanted the HW and not the CH on. Programmer is not firing boiler or pump. I only get HW if I put the CH...
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