Shut Down 

Close air valve at output of tank by turning handle of valve perpendicular to pipe
Close air valve at drain by turning handle of valve perpendicular to drain pipe.

Start Up

Check oil level and clarity. Refill if necessary. Inspect compressor for obvious leaks or defects

Ensure lever at electrical disconnect is in the on position (up)

Open air valves at drain pipe and tank output by turning in-line with pipe

Inspect air dryer for normal operation (as shown) Complete