Toshiba RAV-SP804ATP-E Installation Manual page 53

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 R410A 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 R410A 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)
Min. volume of the indoor unit installed room (m
The concentration limit of R410A which is used in multi air conditioners is 0.3kg/m
NOTE
The minimum indoor floor area compared with the amount of refrigerant is roughly as follows:
(When the ceiling is 2.7m high)
2
m
40
Range below the
35
density limit of
3
0.3 kg/m
30
(countermeasures
not needed)
25
20
Range above the density
15
limit of 0.3 kg/m
(countermeasures
10
needed)
5
0
10 20 30
Total amount of refrigerant
EN-103
≤ Concentration limit (kg/m
3
)
3
.
3
kg
3
)
- 52 - EN-104