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Pipe cutting work
1. Always use the copper pipe cutter when cutting the pipe.
CAUTION
n Always cut in a straight
line for the cut part.
2. Always remove the burr.
(Keep the end of the pipe facing down during the work and make sure that the burr does
not get inside the pipe.)
CAUTION
n If the burr gets inside, it can cause leakage of refrigerant. Therefore always
remove the burr with a reamer.
n Cut pieces can cause problems when they go inside the pipe.
CAUTION
n When welding the part, always pass it through nitrogen. If not, the compressor
may not work or can be damaged.
n Before/After the welding, wrap the area with a wet water cloth. If not, the part
can be damaged.
n Use a protective panel or pay special attention so that the welding torch flame
does not directly touch AHU casing.
n After the welding, always do a leakage test.
WARNING
n Always make sure that the refrigerant is not leaking during the welding.
n When the refrigerant is burnt, it generates a toxic gas hazardous to the human
body.
n Do not proceed the welding work in a closed location.
n After the pipe welding, always do a leakage test.
EXPANSION KIT Installation
Copper
pipe cutter
Pipe
Pipe
Reamer
Pipe
Cut pieces
Tilted Rough
Reamer
Installation Manual 11
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