521 Compressor Saver Wiring Diagram. I connected the black common wire to the compressor side of the contactor, the striped wire to the herm side of the run/start capacitor and the red wire to the common side of the capacitor. 5 2 1 compressor saver wiring diagram.

Black wire to the t1 terminal on the contactor. Remove and discard ptc start thermistor if present. Hard start kit for 1 to 3 ton units