As shown in figures "A", "B", "C", and "D" of the illustrated PLC controlled heating system, what input requirements must be met for the circulating pump #2 to be running? See illustration EL-0260.

Question

Accepted Answer

The hot water tank sensor contacts must be closed and the boiler must be firing.

Answer

The space air sensor contacts must be closed and the boiler must be firing.

Answer

The space air sensor contacts must be closed and the boiler must be idle.

Answer

The hot water tank sensor contacts must be closed and the boiler must be idle.

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