Photovoltaic Direct-driven Inverter VRF
32
4.4.3 Precautions on Refrigerant Leakage
（
1
）
Personnel related to air conditioning engineering design and installation operators
must abide by the safety requirement for preventing refrigerant leakage specified in local laws
and regulations.
（
2
）
The units adopt the R410A refrigerant, which is nonflammable and nontoxic. However,
the space for refrigerant leakage must be sufficient to ensure that the r efrigerant concentration
does not exceed that specified in the safety requirement; otherwise, people involved can be
stifled by the refrigerant. For example the maximum allowed concentration level of refrigerant to
a humanly space for R410A according to the appropriate European Standard is limited to 0.44
kg/m
3
.
The maximum amount of refrigerant (kg) in the system = The volume of the room (m
3
) ×The
maximum allowed concentration level of refrigerant (kg/m
3
)
Total amount of refrigerant (kg) in the system = Total additional charging amount (kg) +
Amount of refrigerant (kg) which is charged before leaving the factory (for the system
consisting of multiple modules in parallel, the accumulative charge quantity of modules before
leaving the factory is used)
Total
amount of refrigerant (kg) in the system ≤The maximum amount of refrigerant (kg) in
the system
（
3
）
When the total amount of refrigerant in the system is more than the maximum amount
of refrigerant, the cooling system should be designed again. In this case, the cooling system
can also be separated into several cooling systems with small capacity, or add corresponding
ventilation measures or alarming display.
Fig. 4.4.3
①
Flow direction of refrigerant leakage.
②
Room for refrigerant leakage. Since the concentration of refrigerant is greater than that
of air, pay attention to the spaces where the refrigerant may residue, for example, the
basement.
Summary of Contents for GMV-Y120WM/C-F
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