Samsung AR**MXWS Series Installation Manual

Contents

18EnglishInstallationStep 2.9 Shortening or extending therefrigerant pipes (assembly pipe)Pipe cutterPipe90° Oblique Rough BurrR 0.4 to 0.890°±2°45°±2°LDDAFlarePipeConnecting pipeFlare nutIndoor outlet pipeCAUTION• Keep the piping length at a minimum to minimizethe additional refrigerant charge due to pipingextension. (Maximum allowable piping length:15 m)• When connecting the pipes, make sure thatsurrounding objects do not interfere with orcontact them to prevent refrigerant leakage dueto physical damage.• Make sure that the spaces where the refrigerantpipes are installed comply with national gasregulations.• Be sure to perform works such as additionalrefrigerant charging and pipe welding under theconditions of good ventilation.• Be sure to perform welding and piping works formechanical connections under the conditions thatthe refrigerant does not circulate.• When reconnecting the pipes, make sureto perform flared-jointing newly to preventrefrigerant leakage.• When working on the refrigerant pipes and theflexible refrigerant connectors, be careful thatthey are not damaged physically by surroundingobjects.• If you need a pipe longer than specified in pipingcodes and standards, you must add refrigerant tothe pipe. Otherwise, the indoor unit may freeze.• While removing burrs, put the pipe face down tomake sure that the burrs do not get in to the pipe.Outer diameter (mm) Torque (N•m) Torque (kgf•cm)ø 6.35 14 to 18 140 to 180ø 9.52 34 to 42 350 to 430ø 12.70 49 to 61 500 to 620ø 15.88 68 to 82 690 to 830(Unit: mm)Outer diameter (D) Depth (A) Flare dimension (L)ø 6.35 1.3 8.7 to 9.1ø 9.52 1.8 12.8 to 13.2ø 12.70 2.0 16.2 to 16.6ø 15.88 2.2 19.3 to 19.7