Samsung AM TXMDEH Series Installation Manual

14Refrigerant pipe installationSelecting refrigerant pipeTemper grade and minimum thickness of the refrigerant pipeOuter diameter [mm] Minimum thickness [mm] Temper gradeø6.35 0.7Annealedø9.52 0.7ø12.70 0.8ø15.88 1.0ø19.05 0.9 Drawnø22.23 0.9t For pipes larger than Ø 19.05, drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be used. If aannealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and causepersonal injury.CAUTIONPipe installation between an outdoor unit and the first Y-jointOutdoor unit capacity [HP] Liquid pipe [mm] Gas pipe [mm] One step upgraded pipe[mm]4 ø9.52 ø15.88 ø19.055 ø9.52 ø15.88 ø19.056 ø9.52 ø19.05 ø22.23f Install the refrigerant pipe according to main pipe size of each outdoor unit capacity.f When the pipe length between an outdoor unit and the farthest indoor unit including elbow exceeds 90 m, the gas pipesize should be upgraded one step among the main pipes from the outdoor unit to the first Y-joint. (The liquid pipe sizewill be maintained.)f If the capacity of the outdoor unit can decline due to the pipe length, upgrade the pipe size one step (gas pipe).Main pipe size upFirst Y-jointPipe installation between Y-jointsIndoor unit totalcapacity(kW)1JQFEJBNFUFS 0t%tNNLiquid pipe (mm) Gas pipe (mm)X ≤ 15.0 ø9.52 ø15.8815.0 < X ≤ 23.2 ø19.05