111
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4.2
4.2.1
4.3
4.3.1
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4.3.2
Ensure that piping does not get bent or deformed during delivery or whilst stored.
On construction sites store piping in a designated location.
To prevent dust or moisture entering, piping should be kept sealed whilst in storage and until it is about to be
connected. If piping is to be used soon, seal the openings with plugs or adhesive tape. If piping is to be stored
for a long time, charge the piping with nitrogen at 0.2-0.5MPa and seal the openings by brazing.
Storing piping directly on the ground risks dust or water ingress. Wooden supports can be used to raise piping
off the ground.
During installation, ensure that piping to be inserted through a hole in a wall is sealed to ensure dust and/or
fragments of wall do not enter.
Be sure to seal piping being installed outdoors (especially if being installed vertically) to prevent rain entering.
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Use a pipe cutter rather than a saw or cutting machine to cut piping. Rotate the piping evenly and slowly,
applying even force to ensure that the piping does not become deformed during cutting. Using a saw or cutting
machine to cut piping runs the risk of copper shavings entering the piping. Copper shavings are difficult to
remove and pose a serious risk to the system if they enter the compressor or block the throttling unit.
After cutting using a pipe cutter, use a reamer/scraper to remove any burrs that have formed at the opening,
keeping the opening of the piping downwards to avoid copper shavings from entering the piping.
Remove burrs carefully to avoid scratches, which may prevent a proper seal being formed and lead to
refrigerant leakage.
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