Gree FLEXX36HP230V1AO Installation & Owner's Manual page 19

DC Inverter Series for R410A Unitary Split Air Conditioner
3.2.2.4.1 Brazed Connection
Screw on the flare nut of the flaring connecting pipe on the outdoor unit valve.
3.2.2.4.2 Flare Connection
Pipe diameter (inch)
3.2.2.5 Sealing of the Knock-off Hole
As for the built-in valve model, during the installation process for connection
pipe, when the connection pipe is passing through the knock-off hole, conduct
sealing with insulated cotton in the knock-off hole of outdoor unit to prevent small
animals from entering. See the following figures.
Ф1/4
Ф3/8
Ф1/2
Ф5/8
Ф3/4
Ф7/8
Tightening torque (N·m)
14
15-30
35-40
45-50
60-65
70-75
80-85