(3) If the length between an IDU and its nearest branch is above 10m, then increase the size of the 
liquid pipe of IDU (only for the pipe size that is≤6.35mm). 
(4) If  the  height  difference  between  indoor  and  outdoor  units  exceeds  90m,  please  consult  the 
manufacturer for specific technical requirements. 
5.4 Connection Pipe among Outdoor Modules