OP
craig sagar
The circuit from the stat will switch the coil which is connections A1 and A2. So you should need a neutral to A2 and the switched side from the stat to A1, assuming it to be 230v. The heater should go through terminals 1 to 6, so terminals 1, 3 and 5 will switch to terminals 2, 4 and 6. It is not clear if the NO terminals are utilised.
think you have answered what i need to know here,i was stuck on where the neutral goes to the moeller but you have said here the neutral goes to a2,god only knows why the previous installer has a bridged red wire as this is to me is a live so if i put a neutral to a2 and the switch or load side from the stat a1 .
i presume then that the power cable going to the heaters ,the red wires go to terminals 2 and 4 and the neutrals all go together on a bus connector or do terminals 1 and 3 also need a power or does the power come from the thermometer