Fujitsu AOU48RLXFZ Design & Technical Manual page 282

When concentration limit is exceeded
When the concentration limit is exceeded,change the 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 or provide opening without
door.
● Countermeasure 2
Reduce the total refrigerant charging amount of the refrigerant equipment
(1) Shorten the length of the refrigerant pipes
Move the location of the outdoor unit closer to the indoor unit, and reduce the total refrigerant
charging amount by shortening the length of the refrigerant pipes.
● Countermeasure 3
Provide gas leak alarm linked with mechanical ventilator.
Gas leak alarm
Countermeasure 3
Mechanical ventilator
Pay special attention to the place, such as a basement, etc. When refrigerant can accummalate,
since refrigerant is heavier than air.
Indoor unit
Countermeasure 1 Opening effective to ventilation
- (06 - 128) -
6. SYSTEM DESIGN