Important Information Regarding The Refrigerant Used; Calculating The Additional Refrigerant Charge - Daikin RXYQQ8T7Y1B Installation And Operation Manual

14.2. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type: R410A
(1)
GWP value: 1975
(1)
GWP=global warming potential
Please fill in with indelible ink:
a the factory refrigerant charge of the product,

b the additional refrigerant amount charged in the field and,

a+b the total refrigerant charge

on the fluorinated greenhouse gases label supplied with the product.
The filled out label must be adhered on the inside of the product and
in the proximity of the product charging port (e.g., on the inside of the
service cover).
6 5
1 Factory refrigerant charge of the product: see unit name
plate
2 Additional refrigerant amount charged in the field
3 Total refrigerant charge
4 Contains fluorinated greenhouse gases covered by the
Kyoto protocol
5 Outdoor unit
6 Refrigerant cylinder and manifold for charging
INFORMATION
National implementation of EU regulation on certain
fluorinated greenhouse gases may require to provide the
appropriate official national language on the unit.
Therefore, an additional
greenhouse gases label is supplied with the unit.
Sticking instructions are illustrated on the backside of that
label.
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
4
1
2
3
multilingual fluorinated

14.3. Calculating the additional refrigerant charge

NOTICE
The refrigerant charge of the system must be less than
100 kg. This means that in case the calculated total
refrigerant charge is equal to or more than 95 kg you must
divide your multiple
independent systems, each containing less than 95 kg
refrigerant charge. For factory charge, refer to the unit
name plate.
14.3.1. How to calculate the additional refrigerant to be charged
Additional refrigerant to be charged=R (kg). R should be rounded off
in units of 0.1 kg.
R=[(X x Ø22.2) x 0.37+(X x Ø19.1) x 0.26+(X
1 2
x Ø12.7) x 0.12+(X x Ø9.5) x 0.059+(X
5
X =Total length (m) of liquid piping size at Øa
1...6
A parameter Total indoor unit
(kg) capacity CR
50%≤CR≤105%
Piping
length≤30 m
105%<CR≤130%
50%≤CR≤70%
70%<CR≤85%
Piping
length>30 m
85%<CR≤105%
105%<CR≤130%
(a) CR=Connection ratio.
INFORMATION
When using multi models, add the sum of individual

HP modules.
Piping length is considered the distance from the

outdoor unit to the farthest indoor unit.
When using metric piping, please take into account following table
concerning the weight factor to be allocated. It should be substituted
in the formula for R.
Inch piping
size (Ø) (mm) Weight factor
6.4 0.022
9.52 0.059
12.7 0.12
15.9 0.18
19.1 0.26
22.2 0.37
When selecting indoor unit, following table with connection ratio (CR)
limitation has to be respected: 50%≤CR≤130%. More detailed
information can be found in technical engineering data.
outdoor system into
x Ø15.9) x 0.18+(X
3
x Ø6.4) x 0.022 ]+A
6
HP
(a)
8 10+12 14+16
0
0.5
0
0.3 0.5
0.7 1
1.2 1.5
Metric piping
size (Ø) (mm) Weight factor
6 0.018
10 0.065
12 0.097
15 0.16
16 0.18
18 0.24
22 0.35
Installation and operation manual
smaller
4
18+20
0.5
1
0.5
1.0
1.5
2.0
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