Hitachi UTOPIA R32 Series - Cutting Copper Refrigeration Pipes; Bending Copper Pipes

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PMEN0654 rev.0 - 12/2023
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GENERALINSTRUCTIONSONTHEINSTALLATIONOFREFRIGERANTPIPES
REFRIGERANT PIPING AND REFRIGERANT CHARGE
5.4.2 Cung copper refrigeraon pipes
Use a pipe cuer and dene the necessary length of pipe and add a
few more cenmetres to give yourself enough margin in case the cut
has to be repeated.
Remove any internal burrs arising from the pipe cuer using a pipe
reamer. While making the cut, slant the pipe downwards to prevent
burrs or shavings from falling inside the pipe.
! CAUTION
•
Ensure the pipe cuer rollers remain perfectly seated on the copper
pipe.
•
Do not use hand saws, circular saws, abrasive grinders or other
tools that generate shavings.
•
Wear appropriate means of protecon during cung or brazing
operaons and installaon (gloves, eye protecon, etc).
•
Strictly follow naonal or local regulaons regarding occupaonal
health and safety.
5.4.3 Bending copper pipes
Where the refrigerant pipes are to be bent, always use a bending tool or a spring, both of a
diameter that is adapted to the pipe to be bent. The bending radii must be as wide as possible so
that the gas or liquid refrigerant ow is not altered and no circulaon noise is generated during
operaon.
! CAUTION
Never bend pipes with radii of less than 90°.
 NOTE
• Bends in refrigerant pipes reduce system performance due to changes in the ow of gas and
liquid refrigerant circulaon.
• Do not use any other tool to bend pipes, as the pipe may be excessively bent or crushed and its
inner diameter reduced.