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This is the diagram of the wiring of my boiler when the circuit is closed and it is heating the water in the hot water cylinder.
In my boiler, I have three contacts Tc, TB1, and TB2 as shown in the picture.
Which is supposed to be the correct wiring in the BDR91?
Since according to the Honeywell diagrams, the wiring in the BDR91 is made connecting wires only to A and B leaving C not connected and used when the circuit is closed. But what about when I have three wires?
In my boiler, I have three contacts Tc, TB1, and TB2 as shown in the picture.
Which is supposed to be the correct wiring in the BDR91?
Since according to the Honeywell diagrams, the wiring in the BDR91 is made connecting wires only to A and B leaving C not connected and used when the circuit is closed. But what about when I have three wires?
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