8
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Charging refrigerant
Installer reference guide
46
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant
charge of the unit is indicated both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent tonnes:
GWP value of the
refrigerant × total refrigerant charge [in kg]/1000
Contact your installer for more information.
8.3 Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
"2 General safety precautions"
▪
"7.1 Preparing refrigerant piping"
8.4 To determine the additional refrigerant amount
If the total liquid piping
length is…
Then…
≤30 m
Do NOT add additional refrigerant.
>30 m
R=(total length (m) of liquid piping–30 m)×0.020
R=Additional charge (kg) (rounded in units of 0.1 kg)
INFORMATION
Piping length is the one-way length of liquid piping.
INFORMATION
Additional refrigerant charge is NOT allowed in case of combination of the outdoor
unit
3MXM40
or
3MXM52
with the indoor units
CVXM-A
and/or
FVXM-A
. The total
piping length MUST be ≤30 m.
CVXM-A9, FVXM-A9 is without this limitation
Maximum allowable refrigerant charge amount
3MXM40, 3MXM52
2.2 kg
3MXM68, 2MXM68
2.4 kg
4MXM68
2.6 kg
4MXM80
3.2 kg
5MXM90
3.3 kg
