Daikin VRV III Series - Page 18

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Piping between outdoor unit (*2) and refrigerant branch kit (part A)
Choose from the following table in accordance with the outdoor unit system capacity type.
Piping between refrigerant branch kits Piping between refrigerant branch kit and BS unit Piping between BS unit and refrigerant branch kit
Choose from the following table in accordance with the total capacity type of all the indoor units connected downstream.
*1 Connection piping must not exceed the refrigerant piping size between outdoor unit and refrigerant branch kit (part A). *2 When selecting 2 pipes line (gas pipe and liquid pipe), use suction gas pipe column for gas pipe and liquid pipe column for liquid pipe.
Piping between refrigerant branch kit, BS unit and indoor unit
Match to the size of the connection piping on the indoor unit.
Pipe size selection 
Piping between outdoor unit multi connection piping kit and outdoor unit (part C)
Piping between outdoor unit multi  connection piping kits (part B)
Piping between outdoor unit and  refrigerant branch kit (part A)
Refer to the diagram below and select the appropriate piping from the tables on the right.
Independent
unit 1
Independent
unit 2
Independent
unit 3
Independent
unit 4
Piping between outdoor unit multi connection piping kit and outdoor unit (part C)
Choose from the following table in accordance with the capacity type of the outdoor unit connected.
Piping between outdoor unit multi connection piping kits (part B)
Choose from the following table in accordance with the total capacity of all the outdoor units connected upstream.

Indoor capacity
index
< 56 kW
56 kW ≤ x< 112 kW 112 kW ≤ x< 160 kW 160 kW ≤ x< 180 kW 180 kW ≤ x< 224 kW 224 kW ≤ x< 330 kW 330 kW ≤ x< 370 kW 370 kW ≤ x< 470 kW 470 kW ≤ x< 530 kW 530 kW ≤ x< 710 kW 710 kW ≤ x< 784 kW
784 kW ≤ x< 1010 kW
1010 kW ≤
φ12.7 φ15.9


φ19.1


φ22.2 φ25.4

φ28.6
 
φ34.9
φ15.9 φ19.1

φ25.4
 
φ28.6

φ34.9

 
φ41.3
φ9.5
φ12.7


φ15.9

 
φ19.4
 
φ25.4

 
φ28.6
φ12.7 φ15.9


φ19.1


φ22.2


φ25.4
 
φ28.6
φ6.4
 
φ9.5

 
φ12.7


φ15.9

 
φ19.1
φ9.5

φ12.7

  
φ15.9

φ19.1
 
φ22.2
Standard
size
Maximum
size
Maximum
size
Standard
size
Maximum
size
Standard
size
Suction gas pipe HP/LP gas pipe Liquid pipe

Indoor capacity
index
Q20 Q25 Q32 Q40 Q50 Q63 Q80
Q100 Q125 Q200 Q250
 
φ12.7
  
φ15.9

 
φ19.1 φ22.2
 
φ15.9
 
φ19.1


φ25.4


φ28.6
 
φ6.4
   
φ9.5
 
φ9.5
  
φ12.7

 
φ15.9
Standard size
Maximum
size
Standard size
Maximum
size
Suction gas pipe
Liquid pipe
Piping size (O.D.)
Piping size (O.D.)
Q280 type Q360 type Q460 type Q500 type Q540 type Q636 type Q712 type Q744 type Q816 type Q848 type
Outdoor unit capacity type Q140 type Q180·212 type Model name of outdoor unit system
Piping size (O. D.)
φ22.2 φ25.4
 
φ28.6
  
φ34.9
φ9.5

φ12.7
 
φ15.9

 
φ19.1
φ12.7 φ15.9
 
φ19.1
  
φ22.2
φ28.6
 
φ34.9

   
φ41.3

φ19.1

φ22.2
 
φ25.4
 
φ28.6

φ22.2 φ25.4

  
φ28.6
Suction gas pipe
Standard
size
Maximum
size
Standard
size
Maximum
size
Standard
size
Maximum
size
HP/LP gas pipe Liquid pipe
Outdoor unit capacity type 280·320 360~392 424 500~532 604~636
Piping size (O. D.)
Suction gas pipe
φ22.2 φ25.4

φ28.6
HP/LP gas pipe
φ19.1

φ22.2


φ25.4
Liquid pipe
φ9.5
φ12.7


φ15.9
Piping size (O. D.)
Suction gas pipe
φ15.9 φ19.1
HP/LP gas pipe
φ12.7 φ15.9
Liquid pipe
φ9.5
(unit : mm) (unit : mm)
(unit : mm) (unit : mm)
01_EN_3P226891_9.fm Page 13 Tuesday, December 1, 2009 4:38 PM