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ATTENTION: for maintenance or scrap, please contact authorized service centers. Maintenance by unqualified
person may cause dangers.
APPENDICES
Connecting pipe diameter
Piping configuration:
Liquid pipe (mm)
Ф6.35
PROCEDURE FOR EXTENDING THE PIPING
Note: improper extension of piping is the main cause of refrigerant leaks. Proceed as shown below:
1. Cut the pipe.
•
Check the length of the pipe based on the
distance between the indoor unit and outdoor
unit.
•
Cut the required pipe using a pipe cutter.
Pipe
90°
slanted
3. Secure an insulating tube.
5. Expand the port
•
Expand the port using a pipe expander:
•
NB: varies according to diameter
Outdoor diameter (mm)
6.35(1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
V 11/23
MAINTENANCE NOTES
Gas pipe (mm)
Ф9.52
Pipe cutter
uneven
burred
hard
mould
pipe
expander
pipe
A (mm)
Max.
Min.
1.3
0.7
1.6
1.0
1.8
1.0
2.4
2.2
Additional refrigerant
(g/m)
20
2. Remove burrs.
•
Remove burrs with a file, ensuring they do not go
into the pipe.
downwards
4. Install a union nut
•
Remove the union nut on the indoor connecting
pipe and outdoor valve. Install the union nut on
the pipe.
union
pipe
pipe
6. Inspection.
•
Check the quality of the expanded port. If
defective, expand the port again following the
procedure described above.
smooth surface
slanted
equal length
pipe
file
defective expansion
surface
cracked
uneven
damaged
thickness
55
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