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.
Total amount of refrigerant (kg)
≤ Concentration limit (kg/m3)
Min. volume of the indoor unit installed room (m3)
NOTE 1:
The minimum indoor floor area compared with the amount of refrigerant is roughly as follows
(When the ceiling is 2.7m high)
Range above the
density limit of
0.3
kg/m
3
(countermeasure
s needed)
40
m
2
35
30
25
20
15
10
10
Total amount of refrigerant
Min. indoor floor area
20 30
kg
5
0
Range below the
density limit of
0.3
kg/m
3
(countermeasure
s not needed)
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