Samsung AM***FXVAF Series Installation Manual

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24Refrigerant pipe installation• When installing, make sure there is no leakage. When collecting the refrigerant, stop the compressor first beforeremoving the connection pipe. If the refrigerant pipe is not properly connected and the compressor workswith the service valve open, the pipe inhales the air and it makes the pressure inside of the refrigerant cycleabnormally high which may lead to explosion and injury.WARNINGRefrigerant pipe workf The length of refrigerant pipe should be as short as possible and the height difference between an indoor and outdoorunit should be minimized.f Piping work must be done within allowable piping length, height difference, and the allowable length after branching.f The pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method.f After installing the pipes, calculate the total length of the pipe to check if additional refrigerant is needed. When you needto charge the additional refrigerant, make sure to use R-410A refrigerant.f Use clean refrigerant pipe and there shouldn’t be any harmful ion, oxide, dust, iron content or moisture inside pipe.f Use tools and accessories that fit on R-410A only.Tool Installation process/purpose Compatibility with conventional toolPipe cutterRefrigerant pipeinstallationPipe cutting CompatibleFlaring tool Pipe flaringRefrigerantmachine oilApply refrigerantoil on flared part Exclusive ether oil, ester oil, alkali benzene oil or synthetic oilTorque wrench Connect flare nutwith pipeCompatiblePipe bender Pipe bendingNitrogen gas Air tightness testPrevent oxidationwithin the pipeWelder Pipe weldingManifold gage Air tightnesstest ~ additionalrefrigerantchargingVacuuming,chargingrefrigerantand checkingoperationNeed exclusive one to prevent mixture of R-22 refrigerant oil use andalso the measurement is not available due to high pressureRefrigerantcharging hoseNeed exclusive one since there is risk of refrigerant leakage or inflowof impuritiesVacuum pump Pipe dryingCompatible (Use products which contain the check valve to preventthe oil from flowing backward into the outdoor unit.) Use the onethat can be vacuumed up to -100.7kpa(5Torr).Scale forrefrigerantchargingCharging refrigerant CompatibleGas leak detector Gas leak test Need exclusive one(Ones used for R-134a is compatible)Flare nut Must use the flare nut equipped with the product. Refrigerant leakage may occur when the conventional flarenut for R-22 is used.k}tGzG⴬㨰䛙G㐘㞬ὤGptluki]_TWZ_XYhTW_UGGGY[ YWX_TW]TXXGGG㝘䟸G[a[_aY^