Does anyone know if the 24VAC power to the CVA needs to be balanced across the three wires - L1 - 12VAC COM - 0V L2 - -12VAC or does it just have to be 24VAC across the two “hot” leads? I ask because I have some old defunct CVA’s that I’d like to bench test and I have a 3-wire 24VAC plug in...
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