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• R32 is heavier than air—as well as other refrigerants—so tends to accumulate at the base (in the vicinity of the floor). If R32 accumulates around base,
it may reach a flammable concentration in case room is small. To avoid ignition, maintaining a safe work environment is required by ensuring appropriate
ventilation. If a refrigerant leak is confirmed in a room or an area where there is insufficient ventilation, refrain from using of flames until the work environ-
ment can be improved by ensuring appropriate ventilation.
• Refrigerant pipes connection shall be accessible for maintenance purposes.
• Install outdoor units in a place where at least one of the four sides is open, and in a sufficiently large space without depressions.
OK
1-4-1. Minimum installation area for Outdoor units
If you unavoidably install a unit in a space where all four sides are blocked or there are depressions, confirm that one of these situations (A, B or C) is satisfied.
Note: These countermeasures are for keeping safety not for specification guarantee.
A) Secure sufficient installation space (minimum installation area Amin).
Install in a space with an installation area of Amin or more, corresponding to refrigerant quantity M (factory-charged refrigerant + locally added refrigerant).
M [kg]
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
B) Install in a space with a depression height of [ 0.125 [m].
Height from the bottom of
0.125 [m] or less
OK
Amin [m²]
12
17
23
28
34
39
45
50
56
62
67
73
78
84
OK
Amin
Height from the bottom of
0.125 [m] or less
NG
en
3
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