Daikin Altherma EHYHBH05A Series - Precautions When Charging Refrigerant; To Determine the Additional Refrigerant Amount; To Determine the Complete Recharge Amount; To Charge Additional Refrigerant

8 | Piping installation
Installer reference guide
95
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
NOTICE
Before completely recharging, perform vacuum drying on the outdoor unit's internal
refrigerant piping as well.
Typical workflow – Completely recharging refrigerant typically consists of the
following stages:
1 Determining how much refrigerant to charge.
2 Charging refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of
the outdoor unit.
8.4.2 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪ "3General safety precautions"[412]
▪ "8.1Preparing refrigerant piping"[484]
8.4.3 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.
8.4.4 To determine the complete recharge amount
8.4.5 To charge additional refrigerant
WARNING
▪ ONLY use R410A as refrigerant. Other substances may cause explosions and
accidents.
▪ R410A contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 2087.5. 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).