INSTALLATION SERVICE PRECAUTIONS (R32)
3
e and the required minimum floor ar
3
ea
The maximum
3
charg
= (4 mm) x LFL , m = (26 m )) x LFL, m = (130 m )x LFL
12 3
33
Where LFL is the lower flammable limit in kg/ m ,R32 LFL is 0.038 kg/ m.
For the appliances with a charge amount m < M = m :
12
The maximum charge in a room shall be in accordance with the following:
m = 2.5 x (LFL
(5/4)
) x h x (A)
1/2
max 0
The required minimum floor area Amin to install an appliance with refrigerant charge M (kg)
shall be in accordance with following: A = (M/ (2.5 x (LFL
(5/4)
)x h))
2
min 0
Where:
Table GG.1 - Maximum charge (kg)
Category
R32
0.306
LFL (kg/m)
3
h(m)
0
Floor area (m)
2
4 7 10 15 20 30 50
1 1.14 1.51 1.8 2.2 2.54 3.12 4.02
1.8 2.05 2.71 3.24 3.97 4.58 5.61 7.254
2.2 2.5 3.31 3.96 4.85 5.6 6.86 8.85
Charge amount (M) (kg)
Minimum room area (m)
2
0.6
1
1.8
2.2
Table GG.2 - Minimum room area (m)
2
Category
R32
0.306
LFL (kg/m)
3
h(m)
0
1.224kg 1.836kg 2.448kg 3.672kg 4.896kg 6.12kg 7.956kg
29 51 116 206 321 543
10 19 42 74 116 196
3 6 13 23 36 60
2 4 9 15 24 40
A leak test must be done after the installation completed.
It is a must to do the safety inspection before maintaining or repairing an air conditioner using
combustible refrigerant in order to ensure that the fire risk is reduced to minimum.
It is necessary to operate the machine under a controlled procedure in order to ensure that any
risk arising from the combustible gas or vapor during the operation is reduced to minimum.
Requirements for the total weight of filled refrigerant and the area of a room to be equipped with
an air conditioner (are shown as in the following Tables GG.1 and GG.2)
17.
18.
19.
20.
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