LG ARUN038GS2 Installation Manual - Page 24
Connection of Outdoor Units
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Refrigerant piping installation Connection of Outdoor Units 2 outdoor units Model Low Pressure Gas Pipe Liquid Pipe [Unit:mm(inch)] High Pressure Gas Pipe Ø34.9(1-3/8) Ø31.8(1-1/4) ARCNB20 Ø28.58(1-1/8) Ø28.58(1-1/8) Ø28.58(1-1/8) Ø19.05(3/4) Ø22.2(7/8) Ø12.7(1/2) Ø19.05(3/4) Ø15.88(5/8) Ø 9.52(3/8) Ø12.7(1/2) Ø12.7(1/2) OD34.9(1-3/8) Ø19.05(3/4) OD28.58(1-1/8) Ø15.88(5/8) Ø38.1(1-1/2) Ø22.2(7/8) OD19.05(3/4) Ø22.2(7/8) OD12.7(1/2) OD19.05(3/4) Ø9.52(3/8) Ø22.2(7/8) Ø28.58(1-1/8) Ø19.05(3/4) Ø22.2(7/8) Ø15.88(5/8) Ø22.2(7/8) Ø15.88(5/8) OD22.2(7/8) Ø19.05(3/4) 3 outdoor units Model Connection of gas pipe Don't cut the pipe less than 70mm Blow nitrogen while brazing Sub1 outdoor Ø34.9(1-3/8) Ø28.58(1-1/8) gas pipe Ø31.8(1-1/4) Ø19.05(3/4) Ø28.58(1-1/8) Ø22.2(7/8) Ø28.58(1-1/8) Ø15.88(5/8) Ø19.05(3/4) OD28.58 OD34.9(1-3/8) ARCNN20 OD19.05(3/4) Ø22.2(7/8) Ø38.1(1-1/2) Connection of liquid pipe Sub1 outdoor unit Ø9.52(3/8) Ø12.7(1/2) Ø19.05(3/4) Ø12.7(1/2) Ø12.7(1/2) Ø15.88(5/8) Ø9.52(3/8) OD19.05(3/4) OD12.7(1/2) Ø22.2(7/8) Model ARCNN30 [Unit:mm(inch)] Connection of gas pipe Blow nitrogen Don't cut the pipe less than 70mm while brazing Main outdoor Ø41.3(16-3/5) Ø28.58(1-1/8) gas pipe Ø38.1(1-1/2) Ø34.9(1-3/8) Ø28.58(1-1/8) Ø34.9(1-3/8) Main pipe Ø19.05(3/4) OD28.58(1-1/8) Ø22.2(7/8) Connection of liquid pipe Main outdoor unit Ø12.7(1/2) Ø22.2(7/8) Ø19.05(3/4) Ø12.7(1/2) Ø19.05(3/4) Ø15.88(5/8) Main pipe Ø9.52(3/8) OD12.7(1/2) Y branch A A To outdoor unit B To branch piping or indoor unit Facing downwards Facing upwards Within +/- 10° B Viewed from point A in direction of arrow Within ± 3° Within ± 3° 24 Outdoor Unit