Daikin RQYQ140-180PY1 Service Manual page 229

SiBE341001
Pipe size selection
Refer to the diagram below and select the appropriate
piping from the tables on the right.
Independent Independent Independent Independent
unit 1 unit 2 unit 3 unit 4
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)
Appendix
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 size (O. D.)
Model name of
Suction gas pipe HP/LP gas pipe
outdoor unit
Standard Maximum Standard Maximum
system
size size size
φ22.2
Q280 type
φ28.6 φ19.1
φ25.4
Q360 type
Q460 type
φ22.2
Q500 type
φ34.9
φ28.6
Q540 type
Q636 type
φ25.4
Q712 type
Q744 type
φ34.9 φ41.3
Q816 type
φ28.6
Q848 type
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 size (O. D.)
Outdoor unit
Suction gas pipe HP/LP gas pipe
capacity type
φ22.2
280·320
φ19.1
φ25.4
360~392
424
φ22.2
φ28.6
500~532
φ25.4
604~636
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.
Outdoor unit Piping size (O. D.)
Suction gas pipe HP/LP gas pipe
capacity type
φ15.9 φ12.7
Q140 type
φ19.1 φ15.9
Q180·212 type
Piping between refrigerant branch kits
Piping between refrigerant branch kit and BS unit
Piping between BS unit and refrigerant branch kit
Liquid pipe
Choose from the following table in accordance with the total capacity type of all the
indoor units connected downstream.
Standard Maximum
size size size
*1 Connection piping must not exceed the refrigerant piping size between outdoor
φ9.5 φ12.7
φ22.2 unit and refrigerant branch kit (part A).
φ15.9
φ12.7
*2 When selecting 2 pipes line (gas pipe and liquid pipe), use suction gas pipe
φ25.4
column for gas pipe and liquid pipe column for liquid pipe.
φ19.1
φ15.9
Indoor capacity
φ28.6 index
φ19.1 φ22.2
< 56 kW
56 kW ≤ x< 112 kW
112 kW ≤ x< 160 kW
160 kW ≤ x< 180 kW
180 kW ≤ x< 224 kW
(unit : mm)
224 kW ≤ x< 330 kW
330 kW ≤ x< 370 kW
Liquid pipe
370 kW ≤ x< 470 kW
φ9.5
470 kW ≤ x< 530 kW
φ12.7
530 kW ≤ x< 710 kW
710 kW ≤ x< 784 kW
φ15.9
784 kW ≤ x< 1010 kW
1010 kW ≤
Piping between refrigerant branch kit, BS unit and indoor unit
Match to the size of the connection piping on the indoor unit.
(unit : mm)
Liquid pipe
Indoor capacity
index
φ9.5
Q20
Q25
Q32
Q40
Q50
Q63
Q80
Q100
Q125
Q200
Q250
Example of connection (R-410A Type)
Piping size (O.D.)
Suction gas pipe HP/LP gas pipe Liquid pipe
Standard Maximum Standard Maximum Standard
size size size size
φ12.7 φ15.9 φ9.5 φ12.7
φ19.1
φ15.9 φ12.7 φ15.9
φ25.4
φ19.1 φ15.9 φ19.1
φ22.2
φ22.2
φ25.4 φ28.6 φ19.4
φ25.4
φ28.6
φ34.9
φ25.4
φ28.6
φ34.9 φ41.3
φ28.6
Piping size (O.D.)
Suction gas pipe Liquid pipe
Maximum
Standard size Standard size
size
φ12.7 φ15.9 φ6.4
φ19.1
φ15.9
φ25.4 φ9.5
φ19.1
φ28.6
φ22.2
(unit : mm)
Maximum
size size
φ6.4 φ9.5
φ12.7
φ9.5
φ15.9
φ12.7
φ15.9 φ19.1
φ19.1 φ22.2
(unit : mm)
Maximum
size
φ9.5
φ12.7
φ15.9
220