Should I Give a Property Mgr Debit Access to my Account?

[Christopher Erwin]

A property manager I recently hired asked me to sign a form giving his firm permission to credit my account for rent deposits, as well as permission to make withdrawals as needed. He noted that he has never made a withdrawal from a client account in the history of the firm, but it is a protection to ensure the separate account his firm has for repairs and maintenance never goes negative, which would be a violation of governing laws. 

Is this normal practice? 

The firm and my point person are background checked and highly recommended, but this is very unique to me. At the least, I will definitely create a separate checking account so my liability is limited. 

Any other thoughts?