LG ARWN Serie Manual De Instalación página 75

(3) With partition and without opening which serve as passage of air to adjoining room
n Calculate refrigerant concentration
Total amount of replenished
refrigerant in refrigerant facility (kg)
Capacity of smallest room where
indoor unit is installed (m
n In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermeasures
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 without
door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outside refrigerant qty.
Countermeasure 2
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is
heavier than air.
Smallest
room
=
Refrigerant concentration
3 )
(R410A)
Gas leak alarm
Mechanical ventilator
Indoor unit
Countermeasure 1 Opening effective to ventilation
Caution For Refrigerant Leak
Outside unit
Indoor unit
In case the result of calculation exceeds
the limiting concentration, perform the
(kg/m 3 )
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
limiting concentration.
Installation Manual 75