TCL Air Conditioner Service Manual
19
2)
R32/R290 air conditioner installation area requirement
m1=(4m
3
)×LFL, m2=(26m
3
) ×LFL, m3=(130m
3
) ×LFL
Where LFL is the lower flammable limit in kg/m
3
, R290 LFL is 0.038kg/m
3
, R32 LFL is 0.306kg/m
3
.
For the appliances with a charge amount m1<M<m2:
The maximum charge in a room shall be in accordance with the flowing: M
max
=2.5×(LFL)
(5/4)
×h
0
×A
1/2
The required minimum floor area A
min
to install an appliance with refrigerant charge M(kg) shall be in
accordance with following: A
min
= (M/ (2.5 x (LFL)
(5/4)
x h
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 m2;
A is the room area, in m2;
LFL is the lower flammable limit, in kg/m3;
h0 is the installation height of the appliance, in meters for calculating M
max
or A
min
, 1.8 m for wall
mounted;
Table GG.1 - Maximum charge (kg)
Category
LFL
(kg/m3)
h0
(m)
Floor area (m
2
)
Maximum charge (kg)
4
7
10
15
20
30
50
R290
0.038
0.6
0.05
0.07
0.08
0.1
0.11
0.14
0.18
1
0.08
0.11
0.03
0.06
0.09
0.2
0.3
1.8
0.15
0.2
0.24
0.29
0.34
0.41
0.53
2.2
0.18
0.24
0.29
0.36
0.41
0.51
0.65
R32
0.306
0.6
0.68
0.9
1.08
1.32
1.53
1.87
2.41
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
Table GG.2 - Minimum room area (m2)
Category
LFL
(kg/m3)
h0
(m)
Charge amount (M) (kg)
Minimum room area (m2)
R290
0.038
0.152kg 0.228kg 0.304kg 0.456kg 0.608kg 0.76kg 0.988kg
0.6
/
82
146
328
584
912
1514
1
/
30
53
118
210
328
555
1.8
/
9
16
36
65
101
171
2.2
/
6
11
24
43
68
115
R32
0.306
1.224kg 1.836kg 2.448kg 3.672kg 4.896kg 6.12kg 7.956kg
0.6
/
29
51
116
206
321
543
1
/
10
19
42
74
116
196
1.8
/
3
6
13
23
36
60
2.2
/
2
4
9
15
24
40
Caution:
Please contact the nearest after-sale service center when maintenance is necessary. At the time
of maintenance, the maintenance personnel must strictly comply with the Operation Manual
provided by the corresponding manufacturer and any non-professional is prohibited to maintain
the air conditioner.
It is necessary to comply with the provisions of gas-related national laws and regulations.
It is necessary to clear away the refrigerant in the system when maintaining or scrapping an air
conditioner.
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