Precautions When Charging Refrigerant; To Determine The Additional Refrigerant Amount - Daikin Altherma 3 R F Installer's Reference Manual

7 | Installation

7.7.2 Precautions when charging refrigerant

7.7.3 To determine the additional refrigerant amount

Installer reference guide
76
3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of
the outdoor unit.
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is done:
1 All refrigerant is recovered from the system.
2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum
drying).
3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed.
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.
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
General safety precautions
▪
Preparation
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
4
indoor unit" [
If the total liquid piping
length is...
≤10 m
>10 m
INFORMATION
Piping length is the one-way length of liquid piping.
"6.2.3 Installation site requirements of the
41].
Do NOT add additional refrigerant.
R=(total length (m) of liquid piping⁠ – ⁠ 1 0 m)×0.020
R=Additional charge (kg) (rounded in units of
0.01 kg)
Then...
ERGA04~08DAV3(A) + EHVZ04+08S18+23DA6V+9W7
Daikin Altherma 3 R F
4P618957-1 – 2020.03