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11.2.6 REFRIGERANT PIPING INSTALLATION
For indoor unit refrigerant piping installation, refer to the installation instruction manual that comes with that indoor
unit.
Do not reuse existing piping, install new piping.
•
Interior and exterior surfaces of the pipes should be kept free of: sulfur from overuse, acidic grime, oily gunk,
moisture, etc.
•
For refrigerant pipes, please use the following materials:
Materials: phosphor deoxidized seamless copperless pipes (outer diameter less than Ø15.88 C1220T-0, greater
than Ø19.05 C1220T- 1/2H).
Pipe
diameter
ø6.35 ø9.52 ø12.7 ø15.88 ø19.05 ø22.22 ø25.4
Minimum
thickness
0.8 0.8 0.8 1.0 1.0 1.0 1.0
Material C1220T-0
C1220T-1/2H
*For ø19.05, if a thickness of greater than 2mm, use of C1220T-0 is possible.
•
For 8HP (CU-8EA***) gas suction side panel, use Ø19.05.
When connecting, utilize included sockets when assembling refrigerant pipes.
11.2.6.1
Regarding pipe assembly
1. Protective coverings for refrigerant pipes
For protective coverings for refrigerant pipes, preventing drain water, grime, dust, etc. from getting inside is an
extraordinarily important operation.
It is important for the leading edge of the pipe to be completely clean, and the essential points are outlined below.
Place
Terms of condition
Cleaning method
More than 1month
pinching
Outside
More than 1 month
Inside regardless
pinching and taping
•
Pinch
method
Close leading edge of the pipe with pliers,seal
cracks by soldering.
•
Taping method: wrap vinyl tape around leading edge.
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