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5.3
Permissible total refrigerant volume
Depending on the output, the outdoor unit is filled with a cer-
tain refrigerant volume at the factory.
Depending on the length of the refrigerant pipes, an addi-
tional refrigerant volume must be filled during the installation.
The total permissible refrigerant volume is limited and
depends on the installation area for the indoor unit.
(→ Page 209)
5.4
Routing refrigerant pipes
1.
Only carry out the work if you are competent and have
knowledge about the special features and risks of R32
refrigerant.
Danger!
Risk of death caused by fire or explosion
if there is a leak in the refrigerant circuit!
The product contains the combustible refri-
gerant R32. In the event of a leak, escaping
refrigerant may mix with air to form a flam-
mable atmosphere. There is a risk of fire and
explosion. In the event of a fire, toxic or cor-
rosive substances, such as carbonyl fluoride,
carbon monoxide or hydrogen fluoride, are
produced.
▶
If you are working on the product when it
is open, before starting work, use a gas
sniffer that is free of ignition sources to
ensure that there is no leak.
▶
If you notice a leak, close the product's
housing, inform the end user and notify
customer service.
▶
Keep all ignition sources away from the
product. Ignition sources are, for example,
open flames, hot surfaces with temper-
atures above 550 °C, electrical devices
or tools that are not free from electrical
sources, or static discharges.
▶
Ensure that the room is sufficiently aer-
ated around the product.
▶
Use a restriction to ensure that unauthor-
ised personnel are kept away from the
product.
2.
Observe the information on handling refrigerant pipes
in the installation instructions for the outdoor unit.
3.
Observe the national regulations for gas installations.
4.
Route refrigerant pipes that comply with standard EN
12735-1 from the wall duct to the product.
5.
Limit the scope of the refrigerant pipes to a minimum.
6.
Do not guide the refrigerant pipes through unventilated
rooms with an area smaller than A
with IEC 60335-2-40:2018 G1.3 Appendix GG.
7.
Protect refrigerant pipes against damage.
8.
Note that the mechanical flare connections of refri-
gerant pipes must be accessible for maintenance pur-
poses.
9.
Bend the pipes only once into their final position. Use a
bending spring to avoid kinks.
8000017440_FT Installation and maintenance instructions
10.
11.
12.
5.5
in accordance
min
Secure the pipes to the wall using insulated wall brack-
ets (cold insulation brackets).
Guide the refrigerant pipes 5–7 cm straight over the
connection and downwards in order to replace the flar-
ing when service work is required.
Check whether, when you open the catches on the re-
frigerant pipes, you can hear a hissing sound (caused
by a factory-side excess pressure of nitrogen). If you
do not find any excess pressure, check all of the
screwed connections and pipes for leakages.
Connecting the refrigerant pipes
Danger!
Risk of injury due to escaping refrigerant.
Touching any escaping refrigerant may
cause injury.
▶
Only carry out work on the refrigerant cir-
cuit if you have been trained to do so.
Danger!
Risk of injury due to leaking flare connec-
tion.
Touching any escaping refrigerant may
cause injury.
▶
If you need to undo a refrigeration circuit
line from the connection on the product,
you must establish a new flare before you
screw the flare nut back on.
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