Gree GMV-Y96WM/A-F(U) Owner's Manual page 28

So, ΣB (Quantity of refrigerant added to each module) = 0kg (0pounds).
Suppose that A (Quantity of refrigerant added to connection pipe) = ∑ Length of liquid pipe
x Quantity of refrigerant added to liquid pipe per meter) = 5kg (11pounds).
R (Quantity of added refrigerant in total) = 5+0=5kg (11+0=11pounds).
After confirming that there is no leakage from the system, when the compressor is not in
operation, charge additional R410A with specified amount to the unit through the filling opening
of the liquid pipe valve of the outdoor unit. If required additional refrigerant cannot be quickly
filled for increase of pressure in the pipe, set the unit at cooling startup and then fill the
refrigerant from gas valve of outdoor unit. If ambient temperature is low, the unit can't be set to
cooling mode but heating mode.
4.5.3 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 unit 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
The maximum amount of refrigerant (kg) in the system = The volume of the room (m
×The maximum allowed concentration level of refrigerant (kg/m
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.
3
3
Fig. 4.5.3
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Photovoltaic Multi VRF
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