EDM SYSHP MINI SPLIT 06 16

Table Of Contents
67
3.4 Storing Copper Piping
3.4.1 Pipe delivery, storage and sealing
Notes for installers
Ensure that piping does not get bent or deformed during delivery or whilst stored.
On construcon sites store piping in a designated locaon.
To prevent dust or moisture entering, piping should be kept sealed whilst in storage and unl 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 me, 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 o the
ground.
During installaon, 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 vercally) to prevent rain entering.
3.5 Manipulang Copper Piping
3.5.1 De-oiling
Notes for installers
Lubricaon oil used during some copper pipe manufacturing processes can cause deposits to form in R32 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 soluon prior to installaon.
Cauon
Never use carbon tetrachloride (CCl
4
) for pipe cleansing or ushing, as doing so will seriously damage the system.
Notes for installers
Use a pipe cuer rather than a saw or cung machine to cut piping. Rotate the piping evenly and slowly, applying even
force to ensure that the piping does not become deformed during cung. Using a saw or cung machine to cut piping runs
the risk of copper shavings entering the piping. Copper shavings are dicult to remove and pose a serious risk to the system
if they enter the compressor or block the throling unit.
Aer cung using a pipe cuer, 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.