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4. The additional refrigerant oil and refrigerant charging required after extending the
connection pipe
• After the length of connection pipe is extended for 10m based on its standard
length, you should add 5 ml of refrigerant oil for each additional 5m of
connection pipe.
• The method of calculating the additional refrigerant charging amount (on the
basis of liquid pipe):
• Additional refrigerant charging amount = extended length of liquid pipe ×
additional refrigerant charging amount per meter
• Basing on the length of standard pipe, add refrigerant according to the
requirement as shown in the table. The additional refrigerant charging amount
per meter varies according to the diameter of liquid pipe. See the following
table.
Configuration of the connection pipe
Additional refrigerant charge amount for the R22, R407C, R410A and R134a
Diameter of connection pipe
Liquid pipe (mm)
Gas pipe (mm)
� 6
� 9.52 or � 12
� 6 or � 9.52
� 16 or � 19
� 12
� 19 or � 22.2
� 16
� 25.4 or � 31.8
� 19
-
� 22.2
-
Pipe expanding method
Note: Incorrect pipe expanding is the main cause of refrigerant leakage. Please
expand the pipe according to the following steps:
A: Cut the pipe
• Confirm the pipe length according to the distance between the indoor and
outdoor units.
• Cut the required pipe with pipe cutter.
pipe
90�
18
G305MA_AF1_AC9_indoor_170216.indd 18-19
Outdoor unit throttle
Cooling and
Cooling only (g/m)
heating (g/m)
15
20
15
50
30
120
60
120
250
250
350
350
pipe cutter
leaning
uneven
burr
B: Remove the burrs
• Remove the burrs with a shaper and prevent the burrs from getting into the
pipe.
pipe
downwards
C: Attach a suitable insulating pipe
D: Attach the union nut
• Remove the union nut on the indoor connection pipe and outdoor valve; install
the union nut on the pipe.
union nut
pipe
E: Expand the port
• Expand the port with expander.
expander
Note:
• "A" varies according to diameter. Please refer to the table below:
Outer diameter (mm)
Max
� 6 - 6.35(1/4")
1.3
� 9.52(3/8")
1.6
� 12-12.7(1/2")
1.8
� 15.8-16(5/8")
2.4
F: Inspection
• Check the quality of the expanded port.
If there is any blemish, expand the port again according to the steps above.
Split Air Conditioner | Aire acondicionado Split | Ar condicionado Split
EN
shaper
hard
mold
pipe
A (mm)
Min
0.7
1.0
1.0
2.2
19
17.02.16 18:51
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