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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 [m
c
] 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 k
g
,
no additional minimum floor area is required.
If the total refrigerant charge in the system is ≥ 1.84 k
g
,
additional minimum floor area requirements is
complied as described below:
<Horizontal Installation>
In the ceiling
In the ceiling
Falling 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
) (k
g
)
A
room
(m
2
)
Maximum refrigerant
charge in a room
(m
max
) (k
g
)
A
room
(m
2
)
Maximum refrigerant
charge in a room
(m
max
) (k
g
)
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.
