Daikin VRV W T-Series Installation Manual

Also see for RWEQ120TAYCU: Operation manual Installation manual

Contents

4 PreparationInstallation manual13RWEQ96~432TAYCUVRV W T-Series water-cooled system air conditioner4P540122-1B – 2018.11Indoor unit capacityindex2 pipes 3 pipes111≤x<230 KHRP26M72H9 KHRP25M72H9≥230 KHRP26M73HU9 KHRP25M73HU9INFORMATIONIf not stated otherwise, maximum 8 branches can beconnected to a header.▪ How to choose an outside multi connection piping kit. Choosefrom the following table in accordance with the number of outsideunits.Number of outsideunitsHeat pump mode Heat recovery mode2 BHFP22T84U BHFP26T84U3 BHFP22T126U BHFP26T126UINFORMATIONReducers or T-joints are field supplied.NOTERefrigerant branch kits can only be used with R410A.4 3 4 System piping (length) limitationMake sure the piping installation does not exceed the maximumallowable pipe length, the allowable level difference, and theallowable length after branching. To illustrate the piping lengthrequirements, 6 cases are discussed in the chapters below. Theydescribe both standard and non-standard outside unit combinations.DefinitionsTerm DefinitionActual piping length Pipe length between outside (a) and indoorunitsEquivalent pipinglengthPipe length between outside (a) and indoorunits, including the equivalent length of thepiping accessoriesTotal piping length Total piping length, from the outside to allindoor units(a) If the system is a multi outside installation, re-read "the firstoutside unit branch as seen from the indoor unit".Equivalent length of the piping accessoriesAccessory Equivalent lengthRefnet joint 1.6 ft (0.5 m)Refnet header 3.3 ft (1 m)Single BSQ36-60T 13 ft (4 m)Single BSQ96T 19 ft (6 m)Multi BS4-6Q54T 19 ft (6 m)Multi BS8-12Q54T 33 ft (10 m)System piping (length) limitationsTerm Definition DistanceActual piping length Pipe length between outside (a)and indoor units540 ft (165 m)Equivalent pipinglength(b)Pipe length between outside (a)and indoor units623 ft (190 m)Total actual pipinglengthTotal piping length from theoutside (a) to all indoor units980 ft (300 m)H1 Height difference betweenoutside and indoor units164 ft(50 m)/130 ft(40 m) (b)Term Definition DistanceH2 Height difference betweenindoor units98 ft (30 m)H3 Height difference betweenoutside units16 ft (5 m)(a) In the case of an outside units multi system, "outside unit"should be read as the "first outside unit multi connectionpiping kit", seen from the indoor units side.(b) The allowable height difference is 164 ft (50 m) in case theoutside unit is positioned higher than the indoor unit, and130 ft (40 m) in case the outside unit is positioned lowerthan the indoor unit.4 3 5 Single module and standard multi-outside-unit combinationsIn case of heat pump modeConnection with indoor units and air handling units4H1H3H2aabb2513a Outside unitb VRV indoor unitPipe Maximum length (actual/equivalent)Longest pipe from the outsideunit or the last indoor unit (1+3,1+2+5)540 ft (165 m)/623 ft (190 m)(a)Longest pipe after the first branch(3, 2+5)295 ft (90 m) (b) /—In case of a multi-outside setup:longest pipe from the outside unitto the last multi-outside pipingbranch (4)33 ft (10 m)/43 ft (13 m)Total pipe length (1+2+3+5) 980 ft (300 m)/— (c)The actual piping length fromeach indoor units to the nearestrefrigerant branch kit130 ft (40 m)/—(a) If the equivalent piping length is more than 295 ft (90 m),size up the main liquid piping according to "4.3.2 To selectthe piping size" on page 11.(b) If actual piping length of indoor units where difference fromthe indoor unit nearest to the outside unit is more than 130 ft(40 m), please size up according to "4.3.7 Piping lengthrequirements" on page 15.(c) In the case of an outside units multi system, "outside unit"should be read as the "first outside unit multi connectionpiping kit", seen from the indoor units side.