Charging Refrigerant; About Charging Refrigerant; About The Refrigerant - Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual

18 Charging refrigerant

In this chapter

18.1 About charging refrigerant

18.2 About the refrigerant

LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
18.1 About charging refrigerant..................................................................................................................................................... 101
18.2 About the refrigerant ............................................................................................................................................................. 101
18.3 Precautions when charging refrigerant ................................................................................................................................. 102
18.4 To determine additional refrigerant amount......................................................................................................................... 104
18.5 To charge refrigerant.............................................................................................................................................................. 106
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.
This product contains refrigerant gases.
Refrigerant type: R744 (CO
WARNING
▪
Do NOT pierce or burn refrigerant cycle parts.
▪
Be aware that the refrigerant inside the system is odourless.
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18 Charging refrigerant
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Installer and user reference guide
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