Do you own an Abbey Spectrum 620?...

... or similar.

Where can i expect to find the switch to turn on the electric water heating system? I had it running a couple of weekends ago but i assume that was running on gas as i hadn't operated any switches except for the one on the gas operation control panel ( the one with the on/off switch and the temp' dial.

The caravan owners manual says there is a seperate switch for electric operation and the instructions for the Truma Ultrastore show me what it looks like but neither of them tell me where the little bugger is.