8 | Charging refrigerant
Installer reference guide
48
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
Use the GWP value mentioned on the refrigerant charge label.
2 Fix the label on the inside of the outdoor unit near the gas and liquid stop
valves.
8.8 To check for refrigerant leaks after charging
INFORMATION
Applicable ONLY for combination with indoor units CVXM-A9, FVXM-A9.
All field made refrigerant joints must be tested for tightness.
No leak shall be detected with a test method that has a sensitivity of 5 grams
refrigerant per year or better, at a pressure of at least 0.25times the maximum
working pressure (see "PS High" on the unit name plate).
In case a leak is detected, recover the refrigerant and repair the joint(s).
Then:
▪ perform the leak tests see "7.3.3To check for leaks"[442].
▪ charge refrigerant.
▪ check for refrigerant leaks after charging (see above).
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