18
|
Charging refrigerant
Installer and user reference guide
102
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
WARNING
The R744 refrigerant (CO
2
) inside the unit is odourless, non-flammable and normally
does NOT leak.
If the unit is installed indoors, ALWAYS install a CO
2
detector according to the
specifications of standard EN378.
If the refrigerant leaks in high concentrations in the room, it may have negative
effects on its occupants such as asphyxiation and carbon dioxide poisoning. Ventilate
the room and contact the dealer where you purchased the unit.
Do NOT use the unit until a service person confirms that the part from which the
refrigerant leaked has been repaired.
Cylinder types
The following cylinder types are used to charge additional R744 refrigerant:
d
e
a
b
c
a
Cylinder with a vapour take-off valve
b
Cylinder with a liquid take-off valve
c
Cylinder with 2 ports for take-off (vapour and liquid)
d
Vapour port
e
Liquid port
Phase diagram of R744
P (bar)
T (C°)
0
31
100
–80
1
5.2
73.8
–57
d
c
b
a
e
P
Pressure (in bar)
T
Temperature (in °C)
a
Solid phase
b
Liquid phase
c
Vapour phase
d
Supercritical fluid
e
Triple point (–57°C, 5.2 bar)
18.3 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
General safety precautions
▪
Preparation
