Arrived on site, found water in drain pan. Provided quote to clear drain line. Building manager gave me verbal approval over the phone to go ahead with the work. I started by clearing the drain pan of water and sucking out the p trap. I then proceeded to blow out the drain line with nitrogen. I then tested the drain line with several gallons of water to verify that the drain line was draining correctly. Turned on system without issue and continued to run.
