Daikin RXF50D5V1B, Installer'S Reference Manual

Page: 47 / 76

8 | Charging refrigerant
Installer reference guide
47
RXF50~71D5V1B
R32 split series
4P519439-15Q – 2021.10
8.3 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
"2 General safety precautions" [ 4 5]
▪
"7.1 Preparing refrigerant piping" [ 4 35]
8.4 To determine the additional refrigerant amount
For ARXM71R
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)×0.035
R=Additional charge (kg) (rounded in units of
0.01 kg)
For other outdoor units
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.