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12.1.12 Indoor Floor Area Requirement
The refrigerant (R32), which is used in the air conditioner, is a flammable refrigerant. So the requirements for
installation space of appliance are determined according to the refrigerant charge amount [mc] used in the appliance.
Regarding the refrigerant charge amount [m
c] used in the appliance, refer to the installation instructions for the
outdoor unit.
If the total refrigerant charge in the system is <1.84 kg, no additional minimum floor area is required.
If the total refrigerant charge in the system is ≥ 1.84 kg, additional minimum floor area requirements is
complied as described below:
<Horizontal Installation>
In the ceiling In the ceilingFalling ceiling etc
Indoor unit
Indoor unit
Indoor unit
In room In room
In room
hinst ≥ 2.2 m
1.8 m ≤ hinst < 2.2 m
0.25 m ≤ hinst < 1.8 m
<Horizontal Installation> <Vertical Installation>
Table I - Maximum refrigerant charge allowed in a room
<Vertical Installation> <Horizontal Installation>
A
room
(m
2
)
Maximum refrigerant
charge in a room
(m
max
) (kg)
A
room
(m
2
)
Maximum refrigerant
charge in a room
(m
max
) (kg)
A
room
(m
2
)
Maximum refrigerant
charge in a room
(m
max
) (kg)
H=0.6m
H=0.6m
H=1.8m H=2.0m H=2.2m
49 2.40
69 2.85
1 0.41 0.46 0.51
50 2.42
70 2.87
2 0.83 0.92 1.01
51 2.45
71 2.89
3 1.24 1.38 1.52
52 2.47
72 2.91
4 1.66 1.84 2.03
53 2.50
73 2.93
5 2.07 2.30 2.53
54 2.52
74 2.95
6 2.49 2.76 3.04
55 2.54
75 2.97
7 2.72 3.02 3.33
56 2.57
76 2.99
8 2.91 3.23
57 2.59
77 3.01
9 3.09
58 2.61
78 3.03
10 3.25
59 2.63
79 3.05
60 2.66
80 3.07
61 2.68
81 3.09
62 2.70
82 3.10
63 2.72
83 3.12
64 2.74
84 3.14
65 2.76
85 3.16
66 2.78
86 3.18
67 2.81
87 3.20
68 2.83
For intermediate A
room
values, the value that corresponds to the lower A
room
value from the table is considered.
Example:
For A
room
= 6.5 m
2
, the value that corresponds to “A
room
= 6 m
2
” is considered.
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