Samsung AM HNNDEH/TL Series Installation Manual

10Installation ProcedureEnglishInstallation Procedure5 Check that the flaring is correct, referring to theillustrations below for examples of incorrect flaring.Correct Inclined DamagedSurface Cracked UnevenThicknessStep 7 Connecting the assembly pipesto the refrigerant pipesThere are two refrigerant pipes of different diameters :• A smaller one for the liquid refrigerant.• A larger one for the gas refrigerant. The inside ofcopper pipe must be clean and has no dust.1 Remove the pinch pipe on the pipes and connect theassembly pipes to each pipe, tightening the nuts, firstmanually and then with a torque wrench, a spannerapplying the following torque.TorquewrenchFlare nutSpannerUnionOuter Diameter (mm) Torque (N•m)Ø6.35 14 to 18Ø9.52 34 to 42Ø12.70 49 to 61Ø15.88 68 to 82Ø19.05 100 to 120(1 N•m=10 kgf•cm)NOTE• If the pipes must be shortened, see Step 6 Cuttingand flaring the pipes on page 9.2 Be sure to use an insulator thick enough to cover therefrigerant tube to protect the condensate water onthe outside of the pipe falling onto the floor and toimprove the efficiency of the unit.3 Cut off any excess foam insulation.4 Make sure that there are no cracks or waves on thebent area.5 It would be necessary to double the insulationthickness (10 mm or more) to prevent condensationeven on the insulator when if the installed area iswarm and humid.6 Do not use joints or extensions for the pipes connectingthe indoor and outdoor units.CAUTION• Connect the indoor and outdoor units using pipes withflared connections (not supplied). For the lines, useinsulated, unwelded, degreased and deoxidized copperpipe (Cu DHP type to ISO 1337 or UNI EN 12735-1),ϑЇ̈ϩɇɵ̷ʪ˙ͱθͱΧʪθɇϩ̈͝˝ΧθʪϑϑЇθʪϑͱ˙ɇϩ̷ʪɇϑϩߤ࢏ߦऌđťɇɇ͝ʒ˙ͱθɇɵЇθϑϩΧθʪϑϑЇθʪͱ˙ɇϩ̷ʪɇϑϩߩ࢏ߢߤऌđťɇ࢏AͱΧΧʪθpipe for hydro-sanitary applications is completelyunsuitable.• For sizing and limits (height difference, line length,max. bends, refrigerant charge, etc.) see the outdoorunit installation manual.• All refrigerant connection must be accessible, in orderto permit either unit maintenance or removing itcompletely.• If the pipes require brazing, make sure that oxygenfree nitrogen (OFN) is flowing through the system.• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.