V 11/21 103
Procedure for extending the piping
N.B.:
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.
2. Remove burrs
• Remove burrs with a file,
ensuring they do not go into
the pipe.
3. Secure an insulating tube
4. Install a union nut
• Remove the union nut on the
indoor connecting pipe and outdoor valve.
Install the union nut on the pipe.
5. Expand the port
Expand the port using a pipe expander.
N.B.:
• "A" varies according to diameter:
Outdoor diameter
(mm)
A (mm)
Max. Min.
6.35 (1/4") 1.3 0.7
9.52 (3/8") 1.6 1.0
12.7 (1/2") 1.8 1.0
15.88 (5/8") 2.4 2.2
6. Inspection
Check the quality of the expanded port. If defective,
expand the port again following the procedure
described above.
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