4.2 Storing Copper Piping
4.2.1 Pipe delivery, storage and sealing
Notes for installers
Ensure that piping does not get bent or deformed during delivery or whilst stored.
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On construction sites store piping in a designated location.
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To prevent dust or moisture entering, piping should be kept sealed whilst in storage and until it is about to be
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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.
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Storing piping directly on the ground risks dust or water ingress. Wooden supports can be used to raise piping
off the ground.
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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.
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Be sure to seal piping being installed outdoors (especially if being installed vertically) to prevent rain entering.
4.3 Manipulating Copper Piping
4.3.1 De-oiling
Notes for installers
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Lubrication oil used during some copper pipe manufacturing processes can cause deposits to form in R410A
refrigerant systems, causing system errors. Oil-free copper piping should therefore be selected. If ordinary (oily)
copper piping is used, it must be cleaned with gauze dipped in tetrachloroethylene solution prior to installation.
Caution
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Never use carbon tetrachloride (CCl
system.
4.3.2 Cutting copper piping and removing burrs
Notes for installers
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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 openin g,
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keeping the opening of the piping downwards to avoid copper shavings from entering the piping.
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Remove burrs carefully to avoid scratches, which may prevent a proper seal being formed and lead to
refrigerant leakage.
) for pipe cleansing or flushing, as doing so will seriously damage the
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