– 76 –
Warnings on refrigerant leakage
Check of concentration limit
The room in which the air conditioner is to be installed requires a design that in the event of refrigerant
gas leaking out, its concentration will not exceed a set limit.
The refrigerant R32 which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia,
and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than
air, it poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R32 is
almost non-existent.
If a conditioner system is to be installed in a small room, select a suitable model and installation procedure so that
if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency,
measures can be made before injury can occur).
In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install
mechanical ventilation combined with a gas leak detection device.
The concentration is as given below.
Refrigerant Concentration Limit shall be in accordance with local regulations.
Total amount of refrigerant (kg)
≤ Concentration limit (kg/m
3
)
Min. volume of the indoor unit installed room (m
3
)
151-EN
152-EN
