Daikin VRV III Series - Page 15

English 10
Pipe size selection
Piping between refrigerant branch kits
• Choose from the following table in accordance with the total
capacity index of all the indoor units connected below this. (part D)
• Do not let the connection piping exceed the main refrigerant piping
size.
Piping between refrigerant branch kit and indoor unit • Match to the size of the connection piping on the indoor unit.
(part E)
 Caution
Refer to the diagram below and select the appropriate piping from the tables on the right.
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. (Note1)
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
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
(unit: mm)
<Single Outdoor Unit System> <Multiple Outdoor Unit System>
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Piping betw
een
refrigerant branching kits (Section D)
Piping between refrigerant branching kits (Section D)
Piping between refrigerant branching kit and indoor unit (Section E)
Piping between refrigerant branching kit and indoor unit (Section E)
Piping between outdoor unit and refrigerant branching kit (Section A)
Piping between outdoor unit connection piping kits (Section B)
Piping between outdoor unit connection piping kit and outdoor unit (Section C)
Piping between outdoor unit connection piping kit and refrigerant branching kit (Section A)
Piping size (O.D.)
φ15.9 φ19.1 φ22.2 φ25.4

φ28.6
φ25.4

φ28.6

 
φ41.3

φ9.5

φ12.7


φ15.9
φ12.7
 
φ15.9

φ19.1
Standard
size
Maximum
size
Standard
size
Maximum
size
Suction gas size Liquid pipe
Q140 Q180 Q280 Q360 Q460 Q500 Q540
 
Outdoor capacity
index
 
Indoor capacity index
Piping size (O.D.)
φ22.2 φ25.4
φ9.5
φ12.7
Suction gas pipe Liquid pipe
280 360
Outdoor unit
capacity type
Piping size (O.D.)
φ15.9 φ19.1
φ9.5
Gas pipe Liquid pipe
Q140 Q180
Outdoor capacity
index
< 11.2 kW
11.2 kW ≤ x< 22.4 kW 22.4 kW ≤ x< 33.0 kW 33.0 kW ≤ x< 37.0 kW 37.0 kW ≤ x< 47.0 kW 47.0 kW ≤ x< 71.0 kW
71.0 kW ≤
φ15.9


φ22.2 φ25.4 φ28.6


φ34.9
Standard
size
Maximum
size
Standard
size
Maximum
size
φ19.1 φ25.4

φ28.6

φ34.9 φ41.3

φ9.5

φ12.7


φ15.9 φ19.1
φ12.7

 
φ15.9

φ19.1 φ22.2
Suction gas 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.)
Liquid pipe
Piping size (O.D.)
(Unit:mm)
(Unit:mm)
(unit: mm)
01_EN_3P226891_9.fm Page 10 Tuesday, December 1, 2009 4:38 PM