Having changed burners ,how do I match up the four wires (not colour coded ) from the old thermorossi RT22 boiler to the new GIERSCH G20? Any ideas?
JOE
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Having changed burners ,how do I match up the four wires (not colour coded ) from the old thermorossi RT22 boiler to the new GIERSCH G20? Any ideas?
JOE
You must not be in the USA. I suggest calling the manufacturer.
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