LG A2UW18GFAC Manual page 160

MULTI
1. Information for Refrigerant
3. Calculate the volume of the room where indoor unit is installed as single room or the smallest room.
Total amount of refrigerant
system (kg)
Volume 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 counter measure shown below:
• Counter measure 1
Provide opening for ventilation.
Provide 0.15% or more size of opening to floor space both above and below door, or provide opening without
door.
• Counter measure 2
Provide gas leak alarm linked with mechanical ventilator.
• Counter measure 3
Reducing the system's refrigerant quantity by deviding into smaller separate system.
CAUTION
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant
is heavier than air.
4
Maximum concentration
limit
(R410A)
Gas leak alarm
Countermeasure 2
Mechanical ventilator
Indoor unit
In case the result of calculation exceeds
the concentration limit, perform the
(kg/m
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
concentration limit.
Countermeasure 1 Opening effective to ventilation
Installation of Outdoor Units