19
|
Charging refrigerant
Installer and user reference guide
108
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
NOTICE
The total refrigerant charge amount in the system MUST always be lower than 15.96
[kg]× the number of indoor units connected downstream of BS units, with a
maximum of 63.8 kg.
Formula:
R=[(X
1
×
Ø19.1
)×0.23+(X
2
×
Ø15.9
)×0.16+(X
3
×
Ø12.7
)×0.10+(X
4
×
Ø9.5
)×0.053+(X
5
×
Ø6.4
)×0.020]×1.04+(A+B+C)
R
Additional refrigerant to be charged [kg] (rounded off to one decimal place)
X
1...5
Total length [m] of liquid piping size at
Øa
A~C
Parameters A~C (see below)
INFORMATION
▪
In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit
charge factors.
▪
When using more than one multi BS unit, add the sum of the individual BS unit
charge factors.
▪
Parameter A:
If the total indoor unit capacity connection ratio (CR)>100%,
charge an additional 0.5 kg of refrigerant per outdoor unit.
▪
Parameter B:
Outdoor unit charge factors
Model
Parameter B
REMA5
0 kg
REYA8~12
REYA14
1.2 kg
REYA16
1.3 kg
REYA18
4.3 kg
REYA20
▪
Parameter C:
Individual BS unit charge factors
Model
Parameter C
BS4A
0.7 kg
BS6A
1.0 kg
BS8A
1.2 kg
BS10A
1.5 kg
BS12A
1.7 kg
Metric piping.
When using metric piping, replace the weight factors in the formula
by the ones from the following table:
Inch piping
Metric piping
Piping
Weight factor
Piping
Weight factor
Ø6.4 mm
0.020
Ø6 mm
0.016
Ø9.5 mm
0.053
Ø10 mm
0.058
Ø12.7 mm
0.10
Ø12 mm
0.088
Ø15.9 mm
0.16
Ø15 mm
0.14
Ø16 mm
0.16
