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8
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Charging refrigerant
Installer reference guide
45
RXF50~71D5V1B
R32 split series
4P519439-18T – 2022.06
8.4 To determine the additional refrigerant amount
If the total liquid piping
length is…
Then…
≤10 m
Do NOT add additional refrigerant.
>10 m
R=(total length (m) of liquid piping–10 m)×0.020
R=Additional charge (kg) (rounded in units of
0.01 kg)
INFORMATION
Piping length is the one-way length of liquid piping.
8.5 To determine the complete recharge amount
INFORMATION
If a complete recharge is necessary, the total refrigerant charge is: the factory
refrigerant charge (see unit name plate) + the determined additional amount.
8.6 To charge additional refrigerant
WARNING
▪
Only use R32 as refrigerant. Other substances may cause explosions and
accidents.
▪
R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 675. Do NOT vent these gases into the atmosphere.
▪
When charging refrigerant, ALWAYS use protective gloves and safety glasses.
NOTICE
To avoid compressor breakdown, do NOT charge more than the specified amount of
refrigerant.
Prerequisite:
Before charging refrigerant, make sure the refrigerant piping is
connected and checked (leak test and vacuum drying).
1
Connect the refrigerant cylinder to the service port.
2
Charge the additional refrigerant amount.
3
Open the gas stop valve.
If pump down is needed in case of dismantling or relocating the system, see
8.7 To fix the fluorinated greenhouse gases label
1
Fill in the label as follows:
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