How do you acquire a business line of credit using equity in a commercial property as collateral?

I have recently acquired a commercial property. I want to obtain a line of credit against the down payment I put on the property. Obviously, I have not done this in the past. But, I envision the transaction being similar to a home equity line of credit. Is there anyone out there that can point me to the right direction. FYI, the commercial property was acquired via a new LLC of which I own 100%.