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day/night water heating


maude
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Hi Folks,can anyone please enlighten me as to a wiring diagram for this type of water heating.I have a jour/nuit timer swith,and two fused isolators.a cable connects from the main swithboard to the fused isolators,and cables connect these to the timer switch before going out to the water heater.At present the systemcauses the differential switch to operate when the timer operates at about 11.30p.m.The differential interupter is new and recently fitted.The jour/nuit has terminals A1,A2,1,2,3,and 4. Many thanks for any forthcoming help-    maude
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