8 | Piping installation
Installer reference guide
102
ERLA11~16D + EBVH16SU23D
Daikin Altherma 3 R F
4P655196-1A – 2022.05
8.4.3 Charging additional refrigerant
To determine the additional refrigerant amount
If the total liquid piping
length is…
Then…
≤10m Do NOT add additional refrigerant.
>10m R=(total length (m) of liquid piping–10m)×0.050
R=Additional charge (kg) (rounded in units of
0.01kg)
INFORMATION
Piping length is the one-way length of liquid piping.
Charging refrigerant: Setup
See "8.3.3Checking refrigerant piping: Setup"[498].
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 both the service port of the gas stop valve
and the service port of the liquid stop valve.
2 Charge the additional refrigerant amount.
3 Open the stop valves.
8.4.4 Completely recharging refrigerant
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.
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