Appendix 3: Pipe Expanding Method - Gree GWH09QB-K6DNA1C Service Manual

Diameter of connection pipe
Liquid pipe
Ф6
Ф6 or Ф9.5
Ф12
Ф16
Ф19
Ф22.2
Note: The additional refrigerant charging amount in Sheet 2 is recommendedvalue, not compulsory.

Appendix 3: Pipe Expanding Method

Note:
Improper pipe expanding is the main cause of refrigerant leakage.Please
expand the pipe according to the following steps:
A:Cut the pip
● Confirm the pipe length according to the distance of indoor unit and outdoor unit.
● Cut the required pipe with pipe cutter.
B:Remove the burrs
● Remove the burrs with shaper and prevent the burrs from getting into the pipe.
C:Put on suitable insulating pipe
D:Put on the union nut
● Remove the union nut on the indoor connection pipe and outdoor valve; install
the union nut on the pipe.
E:Expand the port
● Expand the port with expander.
Note:
● "A" is different according to the diameter, please refer to the sheet below:
Outer diameter(mm)
Ф6 - 6.35 (1/4")
Ф9.52 (3/8")
Ф12 - 12.70 (1/2")
Ф16 - 15.88 (5/8")
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
port again according to the steps above.
106
Additional refrigerant charging amount for R32
Indoor unit throttl
Cooling only,cooling
Gas pipe
and heating(g / m)
Ф9.5 or Ф12
Ф16 or Ф19
Ф19 or Ф22.2
Ф25.4 or Ф31.8
/
/
A(mm)
Max Min
1.3 0.7
1.6 1.0
1.8 1.0
2.4 2.2
Outdoor unit throttle
Cooling only(g / m) Cooling and heating(g / m)
16 12
40 12
80 24
136 48
200 200
280 280
Downwards
Pipe
Smooth surface
The length is equal
16
40
96
96
200
280
Pipe
Pipe cutter
Leaning Uneven
Pipe
Shaper
Union pipe
Hard
mold
Expander
Pipe
Improper expanding
leaning damaged crack
surface
Installation and Maintenance
Service Manual
Burr
uneven
thickness