Cutting Copper Refrigeration Pipes; Bending Copper Pipes - Hitachi UTOPIA R32 Series Installation And Operation Manual

5.4.2 Cutting copper refrigeration pipes
Use a pipe cutter and define the necessary length of pipe and add a
few more centimetres to give yourself enough margin in case the cut
has to be repeated.
Remove any internal burrs arising from the pipe cutter 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 cutter 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 protection during cutting or brazing
operations and installation (gloves, eye protection, etc).
• Strictly follow national or local regulations regarding occupational
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 flow is not altered and no circulation noise is generated during
operation.
!
CAUTION
Never bend pipes with radii of less than 90°.

NOTE
• Bends in refrigerant pipes reduce system performance due to changes in the flow of gas and
liquid refrigerant circulation.
• Do not use any other tool to bend pipes, as the pipe may be excessively bent or crushed and its
inner diameter reduced.
PMEN0654 rev.0 - 12/2023
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