Johnson JDMV2W - Page 218

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
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
)
Charge Amount in kg
Minimum Room Area ( m
2
)
2
Refrigerant
Type
Installation
Height H0(m)
The maximum charge in a room and the required minumum floor area to install
an appliance, 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 Amin.
NOTE 4 For field charged products, calculation of Amin can be based on the
installed refrigerant charge not to exceed the factory specified maximum
refrigerant charge.
3