Charging Refrigerant - Daikin RWEYQ8T8Y1B Installation And Operation Manual

15.2.2 Operating the DIP switches
By operating the DIP switches it is possible to
What to do with DIP switch DS1
COOL/HEAT selector (refer to the manual of the cool/heat
1 selector switch)
OFF=not installed=factory setting
NOT USED
2-4
DO NOT CHANGE THE FACTORY SETTING
What to do with DIP switch DS2/DS3
NOT USED
1-4
DO NOT CHANGE THE FACTORY SETTING
INFORMATION
For details on how to operate or connect the COOL/HEAT
selector: see installation manual of the COOL/HEAT
selector and the wiring diagram.
COOL/HEAT selector function should only be used in case
the unit is used as heat pump system.

16. Charging refrigerant

16.1. Precautions
NOTICE
Refrigerant cannot be charged until field wiring has

been completed.
Refrigerant may only be charged after performing the

leak test and the vacuum drying.
When charging a system, care shall be taken that its

maximum permissible charge is never exceeded, in
view of the danger of liquid hammer.
Charging with an unsuitable substance may cause

explosions and accidents, so always ensure that the
appropriate refrigerant (R410A) is charged.
Refrigerant containers shall be opened slowly.

Always use protective gloves and protect your eyes

when charging refrigerant.
When the refrigerant system is to be opened,

refrigerant must be treated according to the applicable
legislation.
DANGER: ELECTRICAL SHOCK
See page 2.
To avoid compressor breakdown, do not charge the refrigerant

more than the specified amount.
This outdoor unit is factory charged with refrigerant and

depending on pipe sizes and pipe lengths, some systems
require additional charging of refrigerant (see
the additional refrigerant charge" on page
16.2. Important information regarding the refrigerant
used
This product contains fluorinated greenhouse gases. Do not vent
gases into the atmosphere.
Refrigerant type: R410A
(1)
GWP value: 2087,5
(1)
GWP=global warming potential
RWEYQ8+10T8Y1B
VRV-W IV System Air Conditioner
4P399208-1 – 2015.01
Please fill in with indelible ink:



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).
16.3. Calculating the additional refrigerant charge
16.3.1
Additional refrigerant to be charged = R (kg). R should be rounded off
in units of 0.1 kg.
R= [(X
(X
X
"16.3. Calculating
31).
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.
 the factory refrigerant charge of the product,
 the additional refrigerant amount charged in the field and,
+ the total refrigerant charge
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
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.
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 multi outdoor unit system into smaller
independent systems, each containing less than 95 kg
refrigerant charge. For factory charge, refer to the unit
nameplate.
How to calculate the additional refrigerant to be charged
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
4 5
= Total length (m) of liquid piping size at Øa
1...6
A parameter (kg) Heat pump system
8~10 HP
16~20 HP
24~30 HP
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
4
1
2
3
multilingual fluorinated
x Ø15.9) x 0.18 +
3
x Ø6.4) x 0.022] + A
6
Heat recovery system
3 kg 4 kg
4.5 kg 6.5 kg
6 kg 9 kg
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
Installation and operation manual
31