Daikin VRV III Technical Data Manual

Also see for VRV III: Installation manual Operation manual Service manual Operation manual Technical data

Contents

• Outdoor Unit • VRV ®III heat recovery, with connection to heating only hydrobox • REYAQ-P• VRV ® Systems • Outdoor Unit3611 Installation11 - 1 Refrigerant Pipe Selection■ For refnets joints other than the first branch (example refnetjoint b and c), select the proper branch kit model based on thetotal capacity index of all indoor units connected after therefrigerant branch.■ Concerning refnet headers, choose from the following table inaccordance with the total capacity of all the indoor unitsconnected below the refnet header:System piping limitationsPiping length restrictionsMake sure to perform the piping installation within the range of themaximum allowable pipe length, allowable level difference andallowable length after branching as indicated below ("8"=HXHD125):Maximum allowable lengthsActual pipe length between outdoor and indoor unit ≤100 mExample 1: a+b+c+d+e+f+g+p≤100 m a+b+c+d+k+t≤100 mExample 2: a+i+k≤100 m a+b+e+q≤100 mExample 3: a+i≤100 m a+d+m≤100 mEquivalent piping length between indoor and outdoor unit ð120 mequivalent pipe length of refnet to be taken 0.5 m and for header1.0 m.Equivalent pipe length of BSVQ100 = 4 mEquivalent pipe length of BSVQ160 = 4 mEquivalent pipe length of BSVQ250 = 6 mTotal piping length from outdoor to all indoor units ≤300 mPipe length from first branch kit (either refnet joint or refnet header)to indoor unit ≤40 m[Example 1]: unit 8: b+c+d+e+f+g+p≤40 m[Example 2]: unit 6: b+h+t≤40 m, unit 8: i+k≤40 m[Example 3]: unit 8: i≤40 m, unit 2: c+k≤40 mMaximum allowable height differenceDifference in height between outdoor and indoor unitsH1≤40 mDifference in height between lowest and heighestindoor unit H2≤15 mIndoor unitcapacity indexRefrigerant branch kit name3 pipes 2 pipes<200 KHRQ23M20T KHRQ22M20T200≤x<290 KHRQ23M29T KHRQ22M29T290≤x<640 KHRQ23M64T KHRQ22M64T640≥ KHRQ23M75T KHRQ22M75TIndoor unitcapacity indexRefrigerant branch kit name3 pipes 2 pipes<200 KHRQ23M29H KHRQ22M29H200≤x<290 KHRQ23M29H KHRQ22M29H290≤x<640 KHRQ23M64H KHRQ22M64H640≥ KHRQ23M75H KHRQ22M75HNOTICERefrigerant branch kits can only be used with R410A.Example 1: Branch with refnet jointExample 2: Branch with refnet joint and refnet headerExample 3: Branch with refnet headera b c d e f g H1pA B C D E F GBS8h i j k l m nq r s t u v w1 2 3 4 5 6 7 H2BS BS BS BS BS BSH1H2a ibc d e f g hkj8A Bn p q r s tm1 2 3 4 5 67BS BS BS BS BSBSBSaH1H2c d e f g h ib8j k m n p q r1 2 3 4 5 6 7BS BS BS BS BSBS BSNOTICEWhen the equivalent pipe length between outdoor andindoor units is 90 m or more, the size of the main liquidpipe must be increased. Never increase suction gas pipeand HP/LP gas pipe sizes.Depending on the length of the piping, the capacity maydrop, but even in such a case it is possible to increase thesize of the main liquid pipe.Make sure to perform the piping installation within therange of the maximum allowable pipe length, allowablelevel difference and allowable length after branching asindicated above.1 Outdoor unit2 Main pipes3 Increase only liquid pipe size4 First refrigerant branch kit5 Branch selector box6 Indoor unit7 HXHD125 indoor unitH1H2HP Liquid Ø (mm)10 9.5 → 12.712~16 12.7 → 15.91 6 72 5434PW62582-1(2)

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