Samsung AR**MXWS Series Installation Manual

Contents

22EnglishInstallationControl boxRemove the screw for thecontrol box coverRemove the gas and liquidservice port capsFor connecting therefrigerant pipesGas service portLiquid service portConnect the gas and liquidrefrigerant pipesStep 3.3 Evacuating the airThe outdoor unit is loaded with sufficient R-32refrigerant. Do not vent R-32 into atmosphere: itis a fluorinated greenhouse gas, covered by KyotoProtocol, with a Global Warming Potential (GWP) =675. You should evacuate the air in the indoor unitand in the pipe. If air remains in the refrigerant pipes,it affects the compressor. It may cause reductionof cooling capacity and malfunction. Use a vacuumpump.CAUTION• When installing, make sure there is no leakage.When recovering the refrigerant, ground thecompressor first before removing the connectionpipe. If the refrigerant pipe is not properlyconnected and the compressor works with thestop valve open, the pipe inhales the air and itmakes the pressure inside of the refrigerant cycleabnormally high. It may cause explosion andinjury.1 Leave the system in the standby mode.WARNING• Do not turn on the system! This is necessary forbetter vacuum operation (full OPEN position ofElectronic Expansion Valve).2 Connect the charging hose of the low pressureside of manifold gauge to a gas service port asseen in the picture.3415 minutesVacuumPump(Backward flowing prevention)Liquid service port Liquid service port Valve5