How is this possible? Unless you have full supplied single phase
220V and a
start cap for the third leg, you wouldn't even be able to start the
idler
motor. Right?
--


Correct. A starting means is still needed. With a delta connected motor
as phase converter, the third leg of the starting circuit is connected
to the center of the phase that shares the corner with the primary
power connection. With a why connected motor, the third leg of the
starting circuit goes to the center of the phase not used for the
primary power.