Daikin VRV IV+ RXYTQ8U5/U7YF Installation And Operation Manual page 22

14 Piping installation
(a) (b)
Piping length CR
>30 m 50%≤CR≤70%
70%<CR≤85%
85%<CR≤105%
105%<CR≤130%
(a)
Piping length is considered the distance from the outdoor unit to
the farthest indoor unit.
(b)
Total CR = Total indoor unit capacity connection ratio
(c)
In case of a multi-outdoor-unit system, add the sum of the
individual outdoor unit charge factors.
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
Installation and operation manual
22
(c)
A
8 HP 10+12 HP 14+16 HP
0 kg 1 kg
0.3 kg 0.5 kg 1.5 kg
0.7 kg 1 kg 2 kg
1.2 kg 1.5 kg
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
VRV IV+ heat pump for high ambient temperatures
4P546223-1C – 2021.11
RXYTQ