Table GG.1 Maximum charge (kg)
Category
R32
0.306
0.6
1
1.8
2.2
4
0.68
1.14
2.05
2.5
7
0.9
1.51
2.71
3.31
10
1.08
1.8
3.24
3.96
15
1.32
2.2
3.97
4.85
20
1.53
2.54
4.58
5.6
30
1.87
3.12
5.61
6.86
50
2.41
4.02
7.254
8.85
LFL
(kg/m
3
)
h
0
(m)
Floor area(m
2
)
Category
R32
0.306
0.6
1
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
543
196
60
40
LFL
(kg/m
3
)
h
0
(m)
Minimum room area(m
2
)
Charge amount(M)(kg)
Table GG.2 Minimum room area (m
2
)
INTRODUCTION TO REFRIGERANTS R32
The maximum charge and the required minimum floor area
•
Before installing the appliance, you must read the manual carefully
to get the safety information and notes.
•
When filling the combustible refrigerant, any of your rude
operations may cause serious injury or injuries to human body or
bodies and object or objects.
•
A leak test must be done after the installation is 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.
m
1
= (4 m
3
) x LFL, m
2
= (26 m
3
) x LFL, m
3
= (130 m
3
) x LFL
Where LFL is the lower flammable limit in kg/m
3
, R32 LFL is 0.306 kg/m
3
.
For the appliances with a charge amount m
1
< M
≤
m
2
:
The maximum charge in a room shall be in accordance with the following:
m
max
= 2.5 x (LFL)
(5/4)
x h
0
x (A)
1/2
The required minimum floor area Amin to install an appliance with refrigerant
charge M(kg) shall be in accordance with following: A
min
= (M/ (2.5 x (LFL)
(5/4)
xh
0
))
2
Where:
m
max
is the allowable maximum charge in a room, in kg;
M is the refrigerant charge amount in appliance, in kg;
A
min
is the required minimum room area, in m
2
;
A is the room area, in m
3
;
LFL is the lower flammable limit, in kg/m ;
h
0
is the installation height of the appliance, in meters for calculating m
max
or A
min
,
1.8 m for wall mounted;
SET UP & USE
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