Today we changed out the evaporator coil. We removed the old evaporator coil and installed the new evaporator coil, we replaced the filter dryer. Once all new parts were installed we charged the system with 350 psi of nitrogen. The system held the charge for 30min. Then we pulled a deep vacuum down to 500 microns. We charged the system to factory specs and verified the system is operating properly. Thank you for your business today. Quincy,Florida.