Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual page 28

6 Installation
(a) ONLY required for RYYQ8~20 models, NOT for
RXYQ8~54 and RYYQ22~54.
▪ Parameter C:
Parameter C
Model CR≥100%
If Then
8 HP N≥4 C=N×0.1 kg
10 HP N≥5
12 HP N≥6
14 HP N≥7
16 HP N≥8
18 HP N≥9
20 HP N≥10
(a) In case of a multi-outdoor-unit system, add the sum of the
individual outdoor unit charge factors.
CR Total indoor unit capacity connection ratio
N Number of VRV DX and RA DX indoor units connected to
the outdoor unit
Parameter C – Example with multiple outdoor units:
500
8 HP 12 HP
200 300
125 125
#
1 Determine the connection ratio:
▪ Total outdoor unit capacity class = 500
▪ Total indoor unit capacity class = 550
=> CR≥100%
2 Determine parameter C:
▪ N=5
▪ 8 HP: N≥4 => C1=N×0.1=5×0.1 kg
▪ 12 HP: N<6 => C2=0 kg
=> C=C1+C2=0.5 kg
Metric piping. When using metric piping, replace the weight factors
in the formula by the ones from the following table:
Inch piping
Piping Weight factor
Ø6.4 mm 0.022
Ø9.5 mm 0.059
Ø12.7 mm 0.12
Ø15.9 mm 0.18
Ø19.1 mm 0.26
Ø22.2 mm 0.37
Connection ratio requirements. When selecting indoor units, the
connection ratio must comply with the following requirements. For
more information, see the technical engineering data.
Other combinations than those mentioned in the table are not
allowed.
Indoor Total
(a)
units CR
VRV DX
VRV DX 50~130% 50~130%
Installer and user reference guide
28
(a)
CR<100%
If Then
N<4 C=0 kg C=0 kg
N<5
N<6
N<7
N<8
N<9
N<10
550
125 125 50
Action
Metric piping
Piping Weight factor
Ø6 mm 0.018
Ø10 mm 0.065
Ø12 mm 0.097
Ø15 mm 0.16
Ø16 mm 0.18
Ø18 mm 0.24
Ø22 mm 0.35
(b)
CR per type
RA DX LT AHU
Hydrobox
— — —
Indoor Total
(a)
units CR
VRV DX
VRV DX + 80~130% 0~130%
RA DX
RA DX 80~130% —
VRV DX + 50~130% 50~130%
LT
Hydrobox
VRV DX + 50~110% 50~110%
AHU
AHU 90~110% —
(a) Total CR = Total indoor unit capacity connection ratio
(b) CR per type = Allowable capacity connection ratio per
indoor unit type
(b)
CR per type
RA DX LT AHU
Hydrobox
0~130% — —
80~130% — —
— 0~80% —
— — 0~60%
— — 90~110%
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09