Sequence of Installation.
1.Finding available are area outside to install AHU/ACCU for tie-in existing system
2.Install air conditioning new package air conditioning unit 1
3.Tie-in New duct system to existing HVAC system
4.Run package air conditioning unit 1 5.Remove existing ACCU 02.
6.Install air conditioning new package air conditioning unit 2 7.Tie-in New duct system to existing HVAC system 8.Operation HVAC full system