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3 Piping work and
refrigerant charge
Check that reaming is correct.
•
A: Pipe before reaming.
•
B: Pipe after reaming.
If the pipe is not to be immediately flared, protect the end of the
pipe using a suitable cap or high quality insulation tape.
C A U T I O N
Do not leave the ends of flared pipes unprotected.
3.4.5 Bending copper pipes
Where the gas 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.
N O T E
•
Bends in gas 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.
C A U T I O N
Never bend pipes with radii of less than 90°.
3.4.6 Brazing copper refrigeration pipes
Brazing is the most important job in the installation of refrigeration pipes. In the event of an accidental leak due to negligence
during the brazing process, the capillary tubes will be obstructed or the compressor seriously damaged.
85
SMGB0063 rev. 1 - 10/2010
3
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