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Ultra Heat GMV VRF Technical Service Manual UNIT INTRODUCTION
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(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.
Method for calculating the maximum concentration of refrigerant:
(1) Calculate the refrigerant charge quantity of each system.
Charge quantity of an ODU upon delivery (for the system consisting of multiple modules in parallel,
the accumulative charge quantity of modules upon delivery is used) + Onsite charge quantity = Total
refrigerant charge quantity in the system (kg)
(2) Calculate the volume of maximum air conditioning space (m³).
Volume of air conditioning space (m³) = Length x Width x Height
Note: The length, width and height here refer to the effective length, width and height of the indoor
space.
(3) Calculate the maximum refrigerant concentration of the refrigeration system.
Note: If the maximum supported refrigerant concentration is not available in relevant local standard,
use 0.3kg /m³ (0.66lbs/m³) as the maximum supported refrigerant concentration.
(4) If the maximum refrigerant concentration exceeds the allowed threshold, the refrigeration
system must be redesigned. In this case, separate the refrigeration system into multiple small-capacity
refrigeration systems, or contact local Gree sales company.