Page 3
Table.1-1
Table.1-2
R32
R290
Refrigerant
Type
Installation
Height H0(m)
LFL(kg/m )
3
Floor Area (m )
2
0.306
0.038
0.6
1.0
1.8
2.2
0.6
1.0
1.8
2.2
4
0.68
1.14
2.05
2.50
7
0.90
1.51
2.71
3.31
10
1.08
1.80
3.24
3.96
15
1.32
2.20
3.97
4.85
20
1.53
2.54
4.58
5.60
30
1.87
3.12
5.61
6.86
50
2.41
0.05
0.07
0.08
0.10
0.11
0.14
0.18
0.08
0.11
0.13
0.16
0.19
0.23
0.30
0.15
0.20
0.24
0.29
0.34
0.41
0.53
0.18
0.24
0.29
0.36
0.41
0.51
0.65
4.02
7.24
8.85
Max Refrigerant Charge (kg)
R32
LFL(kg/m )
3
Charge Amount
in kg
0.306
R290
0.038
0.6
1.0
1.8
2.2
0.6
1.0
1.8
2.2
1.224kg 1.836kg
29
10
3
2
2.448kg
51
19
6
4
3.672kg
116
42
13
9
4.896kg
206
74
23
15
6.12kg
321
116
36
24
7.956kg
0.152kg 0.228kg 0.304kg 0.456kg 0.608kg 0.76kg 0.988kg
543
82
146
328
584
912
1541
30
53
118
210
328
555
9
16
36
65
101
171
6
11
24
43
68
115
196
60
40
Min. Room Area (m )
2
Minimum Room Area (
m
)
2
Refrigerant
Type
Installation
Height H0(m)
The maximun charge in a room and the required minumum floor area to install an
applicance, please refer to the “Owner’s Manual & Installation Manual” of the unit.
For specific information on the type of gas and the amount, please refer to the relevant label
on the unit itself
NOTE 1
This formula cannot be used for refrigerants lighter than 42 kg/kmol.
NOTE 2
Some examples of the results of the calculations according to the above formula are
given in Tables 1-1 and 1-2.
NOTE 3
For factory sealed appliances, the nameplate on the unit itself marked the refrigerant
charge can be used to calculate A
min
.
NOTE 4
For field charged products, calculation of A
min
can be based on the installed refrigerant
charge not to exceed the factory specified maximum refrigerant charge.
