Haier AW07LC2VHA Technical Overview page 91

REFERENCES
2U - Piping Installation Dimensions
In case elevation B is more than 16 feet, the oil trap should be installed every 16 to 23 feet.
In case the total pipe length (B1+B2) is more than 66 feet, the refrigerant should be charged according to 66 g/ft
(20g/m)
REFERENCES PAGE 91