dumb waiter wiring

Thread Starter

jasonengineering

Joined Nov 3, 2011
1
im a trying to wire up a dumb waiter with reversing contactor from struthers-dunn. model number of the contactor is a 275 series with a coil voltage of 24vac. the motor im trying to wire up to the contactor is a marathon electric 120v 1ph. any help is much apprciated. let me know if you need more info

J
 

jimkeith

Joined Oct 26, 2011
540
First, look at the connection diagram on the motor so you can locate and separate out the starting winding--reversing this winding controls the direction--experiment on the motor while it is free shaft to make sure that it starts in both directions as desired.

The contactor indicated is a 3 pole double-make. To wire such requires the low side of the main winding to be permanently connected to the neutral (circuit return path)--the first contact interrupts the hot side--the other two contacts connect the starting winding per the direction.

The aux contacts are used to seal in either of the two coils.
 

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