Daikin ERGA04EAV3A, Руководство по установке для специалистов

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8 | Piping installation
Installer reference guide
92
ERGA04~08EAV3(A) + EHBH/X04+08EA/EJ6V+9W
Daikin Altherma 3 R W
4P629085-1 – 2020.08
8.5.2 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
General safety precautions
▪
Preparation
8.5.3 To determine the additional refrigerant amount
WARNING
If the total refrigerant charge in the system is ≥1.84 kg (i.e. if the piping length is
≥27 m)
, you need to comply with the minimum floor area requirements for the
indoor unit. For more information, see "7.1.3 Installation site requirements of the
indoor unit" [ 4 59].
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.
8.5.4 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.
8.5.5 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.
CAUTION
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.