Daikin VRV IV W+ Series Installer And User Reference Manual page 97

RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
R=[(X ×Ø22.2)×0.37+(X
1
(X ×Ø12.7)×0.12+(X ×Ø9.5)×0.059+(X
4 5
R Additional refrigerant to be charged [in kg and rounded off to 1 decimal place]
X Total length [m] of liquid piping size at Øa
1...6
A Parameter A
Parameter A. If the total indoor unit capacity connection ratio (CR)>100%, charge
an additional 0.5 kg of refrigerant per outdoor unit.
In case of heat recovery system
Formula:
R=[(X ×Ø22.2)×0.37+(X
1
(X ×Ø12.7)×0.12+(X ×Ø9.5)×0.059+(X
4 5
R Additional refrigerant to be charged [in kg and rounded off to 1 decimal place]
X Total length [m] of liquid piping size at Øa
1...6
A Parameter A
C Parameter C
Parameter A. If the total indoor unit capacity connection ratio (CR)>100%, charge
an additional 0.5 kg of refrigerant per outdoor unit.
Parameter C. When using more than one multi BS unit, add the sum of the
individual BS unit charge factors.
Model
BS1Q10
BS1Q16
BS1Q25
BS4Q
BS6Q
BS8Q
BS10Q
BS12Q
BS16Q
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.
×Ø19.1)×0.26+(X ×Ø15.9)×0.18+
2 3
×Ø6.4)×0.022]+A
6
×Ø19.1)×0.26+(X ×Ø15.9)×0.18+
2 3
×Ø6.4)×0.022]×1.04+A+C
6
Weight factor
0.022
0.059
0.12
0.18
0.26
0.37
18 Piping installation
|
C
0.05 kg
0.1 kg
0.2 kg
0.3 kg
0.4 kg
0.5 kg
0.7 kg
0.8 kg
1.1 kg
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
Installer and user reference guide
0.16
0.18
0.24
0.35
97