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V. Installation
10. Cautions for refrigerant leaks
V
42
3) Where there is a gas leak detection alarm device linked to a mechanical ventilator in the
smallest room then the next smallest room will become the measurement target.
If the result of the above calculation exceeds the dangerous concentration level then make similar
calculations for the second the third smallest room and so on until the result falls short of the
dangerous concentration level.
Outdoor unit
Indoor unit
Ventilator
Smallest
room
Second smallest
room
(3) Calculate the refrigerant density using the results of the calculations in steps 1 and
2 above.
Total volume of refrigerant in
the refrigerant system
Size(m
3
) of smallest room in
which there is an indoor unit
installed
≤
Dangerous concentration(kg/m
3
)
- In the case of R-22: 0.3kg/m
3
DVM E-D/B(chapter5)-E<03759 3/21/02 7:40 PM Page 42