Daikin VRV IV+ Installer And User Reference Manual page 66

6 | Installation
Installer and user reference guide
66
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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
Ø6.4 mm
Ø9.5 mm
Ø12.7 mm
Ø15.9 mm
Ø19.1 mm
Ø22.2 mm
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 units Total CR
VRV DX 50~130%
VRV DX + 80~130%
RA DX
RA DX 80~130%
VRV DX + LT 50~130%
Hydrobox
VRV DX + 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
Action
Weight factor
0.022
0.059
0.12
0.18
0.26
0.37
(a)
VRV DX RA DX
50~130%
0~130% 0~130%
— 80~130%
50~130%
50~110%
—
Metric piping
Piping Weight factor
Ø6 mm 0.018
Ø10 mm 0.065
Ø12 mm 0.097
Ø15 mm
Ø16 mm
Ø18 mm
Ø22 mm
(b)
CR per type
LT Hydrobox
— —
—
—
— 0~80%
— —
— —
RYYQ+RYMQ+RXYQ8~20U7Y1B
4P546228-1A – 2019.10
0.16
0.18
0.24
0.35
AHU
—
—
—
—
0~60%
90~110%
VRV IV+ heat pump