I poked at it a bit with my voltmeter, and I found that when the fan is OFF, there is 5VDC across Red and Green, and when the fan is ON, there is no voltage. So, is this a good place to attach a 5VDC ...
In this HVAC training video program, Jim explains the popular PSC multiple speed motor used in HVAC/R equipment and how relays are used to control their operation. He also uses meters and graphics to ...
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