2.Preventive measures against excess of critical value
1) Make ventilation holes
Ventilation holes should be built above and under the door.The area of each hole should not be
0.15% of the room space.Holes can be made directly in the wall.
2) Reduce the filling content of refrigerant
Filling content of refrigerant can be reduced by shortening the distance between the indoor and
outdoor units.
By reducing the capacity of the outdoor unit.
When outdoor unit be made up of several units.the outdoor capacity of each system should
refrigerant content of system reduce.
3) Install ventilation fans.
Users can install uninterrupted ventilation fans to keep the refrigerant density under the critical
value.
If uninterrupted ventilation is impossible,a combined fanning and alarming device should be
stead (through which immediate ventilation is possible when leak occurs).
(See the figure below)
An example
Ventilation fan and gas leak alariming device
Vertilation opening
The gas leak alarming
device should be installed
at refrigerant gas
stagnation areas
smaller than
reduce.Sothe
installed in its
Installation
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