18
|
Charging refrigerant
Installer and user reference guide
101
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
18 Charging refrigerant
In this chapter
18.1 About charging refrigerant
The outdoor unit is factory charged with refrigerant, but depending on the field
piping you have to charge additional refrigerant.
Before charging refrigerant
Make sure the
external
refrigerant piping of the outdoor unit is checked (leak test,
vacuum drying).
Typical workflow
Charging additional refrigerant typically consists of the following stages:
1
Determining how much you have to charge additionally.
2
Charging additional refrigerant (pre-charging and/or charging).
The cylinder’s internal pressure will drop when there is little refrigerant remaining,
making it impossible to further charge the unit, even if the liquid stop valve
opening is adjusted. Replace the cylinder with one with more refrigerant.
If the piping is long, replenishing with the liquid stop valve fully closed can have the
protection system activated, causing the unit to stop operating.
NOTICE
ALWAYS store and use R744 cylinders in upright position.
NEVER store R744 cylinders near any source of heat or direct sunlight.
18.2 About the refrigerant
This product contains refrigerant gases.
Refrigerant type: R744 (CO
2
)
WARNING
▪
Do NOT pierce or burn refrigerant cycle parts.
▪
Be aware that the refrigerant inside the system is odourless.
