11 Unit installation
Installation and operation manual
14
FXSN50~112A2VEB
CO
₂
Conveni-Pack: indoor unit
4P602815-1F – 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
11‒2 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
11‒3 Example graph for calculation
A
Refrigerant charge limit
B
Room volume
a
Installation is not allowed
b
2 appropriate measures required
c
1 appropriate measure required
d
No measure required
INFORMATION
Even if there is no refrigerating system on the lowest floor,
where the largest system charge (kg) in the building
divided by total volume of the lowest floor (m
3
) exceed the
value for QLMV, provide a mechanical ventilation in
accordance with EN 378-3:2016.
11.2
Mounting the indoor unit
11.2.1
Guidelines when installing the indoor unit
INFORMATION
Optional equipment.
When installing optional equipment,
also read the installation manual of the optional equipment.
Depending on the field conditions, it might be easier to
install the optional equipment first.
Installation options
INFORMATION
The unit can be used with bottom suction by replacing the
interchangeable plate by the air filter holding plate.
b
a
a
a
Air filter holding plate with air filter(s)
b
Interchangeable plate
▪
Ceiling strength.
Check whether the ceiling is strong enough to
support the weight of the unit. If there is a risk, reinforce the ceiling
before installing the unit.
▪ For existing ceilings, use anchors.
▪ For new ceilings, use sunken inserts, sunken anchors or other
field supplied parts.
b
a
c
e
d
a
Anchor
b
Ceiling slab
c
Long nut or turn-buckle
d
Suspension bolt
e
Indoor unit
▪
Suspension bolts.
Use M10 suspension bolts for installation.
Attach the hanger bracket to the suspension bolt. Fix it securely
using a nut and washer from the upper and lower sides of the
hanger bracket.
