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The boiler does heat the domestic hot water, not to a tank but as required when a hot tap is turned on. There are no controls outside of the boiler. On the boiler I have a domestic water temperature control a central heating temp control and a old type pin selector clock timer. The domestic...

The thermostat has a model number of TH-0470. Pics as follows & user guide

The boiler is a Hermann ikon 23t. It currently has no independant thermostat only a white cable (next to the black mains cable in pic) marked as thermostat with a sensor on.

I'd like to connect a new digital timer/thermostat to my Ikon-t boiler but need help with the wiring. The timer I was recommended has a backplate with L N 1 Com 2 Nc 3 4 No Below is a pic of the boiler wiring. [/img] So basically, what wiring should go to where in the...

Wiring a digital programmer to the Ikon-t