16
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Unit installation
Installer and user reference guide
53
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07
Example:
Total refrigerant charge in the system is 45 kg and room volume is
300 m
3
. 45/300=0.15, which is >QLMV (0.074) and <QLAV (0.18), therefore install
at least 1 appropriate measure in the room.
A (kg)
B (m³)
0
0
100 150
50
200 250
300
350
450
550
400
500
600 650 700 750 800 850 900 950 1000
5
10
15
20
25
30
35
40
45
50
55
60
65
70
c
b
a
QLMV
QLAV
16‒2 Example graph for calculation
A
Refrigerant charge
B
Room volume
a
2 appropriate measures required
b
1 appropriate measure required
c
No measure required
For occupancies on the lowest underground floor of the building
If the total refrigerant charge (kg)
divided by the room volume
(a)
(m
3
) is…
…the number of appropriate measures
must be at least…
<RCL
0
>RCL and ≤QLMV
1
>QLMV and <QLAV
2
>QLAV
Value CANNOT be exceeded!
(a)
For occupied spaces with a floor area exceeding 250 m
2
, use 250 m
2
as the floor area for
determination of the room volume (
Example:
even if the room area is 300 m
2
and the
room height is 2.5 m, calculate the room volume as 250 m
2
×2.5 m=625 m
3
)
Example:
Total refrigerant change in the system is 45 kg and room volume is
300 m
3
. 45/300=0.15, which is >RCL (0.072) and <QLAV (0.18), therefore install at
least 2 appropriate measures in the room.
A (kg)
B (m³)
0
0
100 150
50
200 250
300
350
450
550
400
500
600 650 700 750 800 850 900 950 1000
5
10
15
20
25
30
35
40
45
50
55
60
65
70
d
b
a
RCL
QLAV
QLMV
c
16‒3 Example graph for calculation
A
Refrigerant charge limit
B
Room volume
a
Installation is not allowed
Summary of Contents for FXFN112A2VEB
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