Daikin ARXN25N6V1B9 Manuel D'installation page 11

Outdoor Unit Installation
6.
Refilling the refrigerant.
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
It is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal operation.
1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like "liquid filling siphon
attached" displayed on it.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when
filling.
There is a siphon pipe inside, so the
cylinder need not be upside-down to
fill with liquid.
• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.
f
NOTICE
In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO -equivalent) is used to
determine the maintenance intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000
Use the GWP value mentioned on the greenhouse gases label. This GWP value is based on the 4th IPCC Assessment Report. The GWP
value mentioned in the manual might be outdated (i.e., based on the 3rd IPCC Assessment Report).
2 Fix the label on the unit according to the instructions in the manual.
7.
Refrigerant piping work.
7-1 Cautions on pipe handling.
1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender
for bending.
7-2 Selection of copper and heat insulation materials.
When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/(mh •°C))
Refrigerant gas pipe's surface temperature reaches 110°C max.
Choose heat insulation materials that will withstand this temperature.
2) Be sure to insulate both the gas and liquid piping and to provide insulation
dimensions as below.
Gas side
O.D. 9.5mm
Minimum bend radius
30mm or more
Thickness 0.8mm (C1220T-O)
3) Use separate thermal insulation for gas and liquid refrigerant pipes.
English
To fix the fluorinated greenhouse gases label
a
1 Fill in the label as shown in the illustration.
a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see
b
accessories), peel off the applicable language and stick it on top of a.
b Factory refrigerant charge: see unit name plate
c
c Additional refrigerant amount charged
d Total refrigerant charge
d
e Greenhouse gas emissions of the total refrigerant charge expressed as tonnes CO
e
equivalent
f GWP = Global warming potential
Gas pipe
Liquid side
thermal insulation
O.D. 6.4mm I.D. 12-15mm
Thickness 10mm Min.
Filling other cylinders
Turn the cylinder upside-down
when filling.
Rain
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt or water out.
Gas pipe
Liquid pipe
thermal insulation
I.D. 8-10mm
Gas pipe
insulation
2
2
Wall
Be sure to
place a cap.
Inter-unit wiring
Liquid pipe
Liquid pipe
insulation
Finishing tape
Drain hose
7