HiCustomer Thank you for asking your question on Just Answer. The other Experts and I are working on your answer. By the way, it would help us to know:
What do you have to work with?
Is there a contactor ?
A pressure switch ?-Could you explain your situation a little more?Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
Is it a packaged unit or are you trying to put it togeather ?
What voltage is the coil on the contactor ?
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If the coil not the contacts is 220 volt thad diagram will work fine
But if the coil is rated 110 volt You will either need a transformer or a netural wire also
The only other thing it lacks is an on off switch