To Determine The Additional Refrigerant Amount - Daikin VRV 5-S User Reference Manual

19 | Charging refrigerant

19.4 To determine the additional refrigerant amount

Installer and user reference guide
110
Global warming potential (GWP) value: 675
Periodical inspections for refrigerant leaks may be required depending on the
applicable legislation. Contact your installer for more information.
NOTICE
Applicable legislation on fluorinated greenhouse gases requires that the refrigerant
charge of the unit is indicated both in weight and CO
Formula to calculate the quantity in CO
refrigerant × total refrigerant charge [in kg]/1000
Contact your installer for more information.
WARNING
The maximum indoor capacity index which can be connected to a SV unit port is
determined based on the smallest room served by that port.
In case the system serves the lowest underground floor of a building, there is an
extra limit to the maximum allowable total refrigerant amount. This maximum
refrigerant amount is determined based on the area of the smallest room on the
lowest underground floor.
See "16 Special requirements for R32
allowable total refrigerant amount.
INFORMATION
For final charge adjustment in the test laboratory, please contact your local dealer.
INFORMATION
Note down the amount of additional refrigerant that is calculated here, for later use
on the additional refrigerant charge label. See
greenhouse gases
NOTICE
The refrigerant charge of the system must be less than 79.8 kg. For factory charge,
refer to the unit name plate.
Formula:
R = [(X × Ø15.9) × 0.16 + (X
1
0.020] + A
R Additional refrigerant to be charged [kg] (rounded off to one decimal place)
X Total length [m] of liquid piping size at Øa
1...4
A Parameter A (see below)
INFORMATION
When using more than one SV unit, add the sum of the individual SV unit charge
factors.
▪ Parameter A: Individual SV unit charge factors
Model
SV1A
equivalent tonnes: GWP value of the
2
units" [
label" [ 4 114].
× Ø12.7) × 0.10 + (X
2
equivalent.
2
4 61] to determine the maximum
"19.7 To fix the fluorinated
× Ø9.5) × 0.053 + (X
3 4
Parameter A
0.4 kg
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
× Ø6.4) ×