Daikin RYYQ8U7Y1B, Инструкция по установке и эксплуатации

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17 | Piping installation
Installer and user reference guide
71
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
Outdoor unit capacity
type (HP)
Piping outer diameter size (mm)
Gas pipe Liquid pipe
8 19.1 9.5
10 22.2 9.5
12~16 28.6 12.7
18~22 28.6 15.9
24 34.9 15.9
26~34 34.9 19.1
36~54 41.3 19.1
D: Piping between refrigerant branch kits
Choose from the following table in accordance with the indoor unit total capacity
type, connected downstream. Do not let the connection piping exceed the
refrigerant piping size chosen by the general system model name.
Indoor unit capacity index Piping outer diameter size (mm)
Gas pipe Liquid pipe
<150 15.9 9.5
150≤x<200 19.1
200≤x<290 22.2
290≤x<420 28.6 12.7
420≤x<640 15.9
640≤x<920 34.9 19.1
≥920 41.3
Example:
▪ Downstream capacity for E=capacity index of unit 1
▪ Downstream capacity for D=capacity index of unit 1+capacity index of unit 2
E: Piping between refrigerant branch kit and indoor unit
Pipe size for direct connection to indoor unit must be the same as the connection
size of the indoor unit (in case indoor unit is VRV DX indoor or Hydrobox).
Indoor unit capacity index Piping outer diameter size (mm)
Gas pipe Liquid pipe
15~50 12.7 6.4
63~140 15.9 9.5
200 19.1
250 22.2
▪ When the equivalent pipe length between outdoor and indoor units is 90 m or
more, the size of the main pipes (both gas side and liquid side) must be
increased. Depending on the length of the piping, the capacity may drop, but
even in such a case the size of the main pipes has to be increased. More
specifications can be found in the technical engineering data book.