Daikin RXYSQ4-5-6PA7V1B Service Manual

Contents

SiBE34-802 Example of ConnectionAppendix 2494. Example of ConnectionExample of connection(Connection of 8 indoor units Heat pump system)Branch with refnet joint Branch with refnet joint and refnet header Branch with refnet headerMaximumallowablelengthBetween outdoor andindoor unitsActual pipe length Pipe length between outdoor and indoor units 150 m[Example] unit 8: a+b+c+d+e+f+g+p 150 m [Example] unit 6: a+b+h 150 m, unit 8: a+i+k 150 m [Example] unit 8: a+i 150 mEquivalent length Equivalent pipe length between outdoor and indoor units 175 m (Assume equivalent pipe length of refnet joint to be 0.5 m and of the refnet header to be 1.0 m. (for calculation purposes))Total extensionlength Total piping length from outdoor unit to all indoor units between 10 m and 300 mAllowableheightBetween outdoor andindoor unitsDifference inheight Difference in height between outdoor and indoor units (H1) 50 m ( 40 m if outdoor unit is located in a lower position).Between indoor and indoorunitsDifference inheight Difference in height between adjacent indoor units (H2) 15 mAllowable length after the branch Actual pipe length Pipe length from rst refr igerant branch kit (either refnet joint or refnet header) to indoor unit 40 m[Example] unit 8: b+c+d+e+f+g+p 40 m [Example] unit 6: b+h 40 m, unit 8: i+k 40 m [Example] unit 8: i 40 mRefrigerant branch kit selectionRefrigerant branch kits can only be used with R-410A.Use the following refnet joint Use the following refnet headerPipe size selectionCaution on selecting connection pipesIf the overall equivalent piping length is 90 m, be sure toenlarge the pipe diameter of the gas-side main piping. If therecommended pipe size is not available, stick to the originalpipe diameter (which may result in a small capacity decrease).[Gas side]RXYSQ4+5: Ø15.9→Ø19.1RXYSQ6: Ø19.1→Ø22.2A. Piping between outdoor unit and refrigerant branch kit• Match to the size of the connection piping on the outdoor unit.Outdoor unit connection piping sizeB. Piping between refrigerant branch kits• Use the pipe size from the following table.C. Piping between refrigerant branch kit and indoor unit• Pipe size for direct connection to indoor unit must be the same as theconnection size of indoor unit.How to calculate the additional refrigerant to be chargedAdditional refrigerant to be charged R (kg)R should be rounded off in units of 0.1 kgindoor unitrefnet jointrefnet headera b c d e f gh i j k l m n1 2 3 4 5 6 78H2H1pA B C D E F G H1 H2a ibc d e f g h1 2 3 4 5 6kj7 8A BaH1H2c d e f g h ib 1 2 3 4 5 6 78Outdoor unit capacity type Refrigerant branch kit nameRXYSQ4~6 KHRQ22M20TOutdoor unit capacity type Refrigerant branch kit nameRXYSQ4~6 KHRQ22M29HMain pipe(enlarge)First refrigerantbranch kitIndoorunitOutdoor unitcapacity typePiping size (outer diameter x minimumthickness)Gas pipe Liquid pipeRXYSQ4+5 Ø15.9x1.0(Ø19.1x1.0) Ø9.5x0.8RXYSQ6 Ø19.1x1.0(Ø22.2x1.0)Piping size (outer diameter x minimum thickness)Gas pipe Liquid pipeØ15.9x1.0 Ø9.5x0.8 Indoor capacityindexPiping size(outer diameter x minimum thickness)Gas pipe Liquid pipe20+25+32+40+50 Ø12.7x0.8 Ø6.4x0.863+80+100+125 Ø15.9x1.0 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 joint and refnet headerR=[73 x 0.054] + [69 x 0.022] = 5.46 5.5 kga: Ø9.5x30 m d: Ø9.5x13 m g: Ø6.4x10 m j: Ø6.4x10 mb: Ø9.5x10 m e: Ø6.4x10 m h: Ø6.4x20 m k: Ø6.4x9 mc: Ø9.5x10 m f: Ø6.4x10 m i: Ø9.5x10 m