- With partition and without opening which serve as passage of air to adjoining room
Calculate refrigerant concentration
Total amount of replenished
refrigerant in refrigerant facility [kg(lbs)]
Capacity of smallest room where
indoor unit is installed [m
In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermea-
sures shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outdoor refrigerant qty.
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay,
since refrigerant is heavier than air.
= Refrigerant concentration
Gas leak alarm
CAUTION FOR REFRIGERANT LEAK
In case the result of calculation exceeds
the limiting concentration, perform the
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
Countermeasure 1 Opening effective to ventilation