Gree FLEXX36HP230V1AO Installation & Owner's Manual page 21

DC Inverter Series for R410A Unitary Split Air Conditioner
Note that the gas and liquid valve can be opened fully only after the
manifold valve assembly is removed.
(8) Place back the caps of the liquid valve, gas valve and also the service port.
For large-size units, there are maintenance ports for liquid valve and gas valve.
During evacuation, you may connect the two hoses of the branch valve assembly to
the maintenance ports to speed up the evacuation.
3.2.4 Refrigerant Adding
See the following table for the amount of additional refrigerant.
Item
Model
FLEXX36HP230V1AO
FLEXX60HP230V1AO
3.2.5 Installation of Condensate Drain Pipe
3.2.5.1 Outdoor Side Drainage Pipe
(1) If the outdoor unit is underneath the indoor unit, arrange the pipeline
according to the following diagram.
1) Drain hose should be placed on the ground and its end should not be
immersed into water. The whole pipeline should be supported and fixed
onto the wall.
2) Wind the insulating tape from bottom to top.
Unnecessary
Standard
pipe length
7.5m
16
charge pipe
length
≤ 9.5m
Additional refrigerant
amount for extra pipe
30g/m