Daikin RXYSQ4P8V1B Installation Manual

Installation manual12 RXYSQ4~6P8V1B+Y1BVRVIII-S System air conditioner4PW68122-1 – 02.2011Pipe size selectionHow to calculate the additional refrigerant to be chargedAdditional refrigerant to be charged R (kg)R should be rounded off in units of 0.1 kgPiping size (outer diameter x minimumthickness)Symbol Gas pipe Liquid pipeBetween outdoor and firstrefrigerant branch kit a Ø19.1x1.0Ø9.5x0.8Between refrigerant branch kit andrefrigerant branch kit b Ø15.9x1.0Between refrigerant branch kit andBP unit c, d, eTotal indoorcapacity Q Gas pipe Liquid pipeQc, Qd, Qe≤5.0 kW Ø12.7x0.8 Ø6.4x0.8Qc, Qd, Qe>5.0 kW Ø15.9x1.0 Ø9.5x0.8NOTE ■ Qc, Qd, Qe is total connected indoor capacity.■ c, d, e indicates the symbols in the figure.ExampleIndoor 4: 2.5 kW}Indoor 5: 3.5 kW Qe=11.0 kWIndoor 6: 5.0 kW➡ (Gas pipe) Ø15.9x1.0 and (liquid pipe) Ø9.5x0.8R= ( Total length (m) of liquidpiping size at Ø9.5 ) x0.054+ ( Total length (m) of liquidpiping size at Ø6.4 ) x0.022Example for refrigerant branch using refnet jointR=[40 x 0.054] + [78 x 0.022] = 3.876 ⇒ 3.9 kga: Ø9.5x10 m d: Ø9.5x10 m g: Ø6.4x10 m j: Ø6.4x10 m m: Ø6.4x8 mb: Ø9.5x10 m e: Ø9.5x10 m h: Ø6.4x10 m k: Ø6.4x5 mc: Ø6.4x10 m f: Ø6.4x10 m i: Ø6.4x10 m l: Ø6.4x5 m