GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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1.8 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) GMV5E series VRF units adopt the R410A refrigerant, which is nonflammable and nontoxic.
However, the space for refrigerant leakage must be sufficient to ensure that the refrigerant
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 refrigeran
t (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.
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.
1.9 Unit Operating Temperature
Cooling
-5°C~52°C
Heating
-20°C~24°C
In the case of a full fresh air conditioning IDU, the unit operating temperature is as follows:
Cooling
16°C~45°C
Heating
-7°C~16°C
Note
：
Out of the working Temperature Range may damage this products and will invalidate the
warranty.
