Samsung 018 Series User & Installation Manual

37ENGLISHPerforming leak test & insulationLeak testLEAK TEST WITH NITROGEN (before opening valves)In order to detect basic refrigerant leaks, the refrigerant pipes and system mustbe pressurized with nitrogen (using a pressure regulator) at a pressure above4.1 MPa (595 psig ). This should be done before connecting a vacuum pump orreleasing the factory R-410A charge.LEAK TEST WITH R-410A (after opening valves)Before opening valves, release all the nitrogen from the system. Create a vacuumwith a vacuum pump. Open factory service valves. After opening valves checkleaks using a R-410A leak detector.• Discharge all the nitrogen, create a vacuum, and charge the system.CAUTIONInsulationOnce you have checked that there are no leaks in the system, you can insulate the piping and hose.1. To avoid condensation problems, place T13.0 (1/2”) or thickerAcrylonitrile Butadien Rubber separately around each refrigerant pipe. No gapNBR [T13.0 (1/2”) or thicker]Insulation coverIndoor unitBe sure to overlapthe insulationInsulation• Must fit tightly againstbody without any gap.CAUTION• Always make the pipe seams face upward.NOTE2. Wind insulating tape around the pipes and drain hose. Avoid compressingthe insulation too much.3. Finish wrapping insulating tape around the rest of the pipes leading tothe outdoor unit.4. The pipes and electrical cables connecting the indoor unit with theoutdoor unit must be fixed to the wall with suitable ducts and/orfasteners per national and local regulation.• All refrigerant connections must be accessible in order to permit either unit maintenance or removingit completely.CAUTION