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12 Unit installation
INFORMATION
For more information regarding allowable refrigerant
charge and space volume calculations see the reference
guide of the indoor unit.
Appropriate measures
INFORMATION
Appropriate measures are field supply. Choose and install
all required appropriate measures in accordance with
EN 378-3:2016.
▪ (natural or mechanical) ventilation
▪ safety shut-off valves
▪ safety alarm, in combination with a CO
safety alarm alone is NOT considered an appropriate measure
where occupants are restricted in their movements)
▪ CO
refrigerant leak detector
2
WARNING
Install the unit only in locations where the doors of the
occupied space are not tight fitting.
WARNING
When using safety shut-off valves, make sure to install
measures such as a bypassing piping with a pressure relief
valve (from liquid pipe to gas pipe). When the safety shut-
off valves close and no measures are installed, increased
pressure may damage the liquid piping.
To determine the minimum number of appropriate
measures
For occupancies other than on the lowest underground floor of
the building
If the total refrigerant charge
(kg) divided by the room
(a)
3
volume
(m
) is...
<QLMV
>QLMV and <QLAV
>QLAV
(a)
For occupied spaces with a floor area exceeding 250 m
2
250 m
as the floor area for determination of the room volume
(Example: even if the room area is 300 m
is 2.5 m, calculate the room volume as 250 m
Example: Total refrigerant charge in the system is 45 kg and room
3
volume is 300 m
. 45/300=0.15, which is >QLMV (0.074) and
<QLAV (0.18), therefore install at least 1 appropriate measure in the
room.
QLAV
70
65
a
60
55
50
45
40
35
30
25
20
15
10
5
0
0
50
100 150
200 250 300 350
400
450
12‒1 Example graph for calculation
Installation and operation manual
14
refrigerant leak detector (a
2
...the number of appropriate
measures must be at least...
0
1
2
2
, use
2
and the room height
2
×2.5 m=625 m
3
)
QLMV
b
c
500
550
600 650 700 750 800 850 900 950 1000
B (m³)
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
(a)
3
volume
(m
) is...
<RCL
>RCL and ≤QLMV
>QLMV and <QLAV
>QLAV
(a)
For occupied spaces with a floor area exceeding 250 m
2
250 m
as the floor area for determination of the room volume
(Example: even if the room area is 300 m
is 2.5 m, calculate the room volume as 250 m
Example: Total refrigerant change in the system is 45 kg and room
3
volume is 300 m
. 45/300=0.15, which is >RCL (0.072) and <QLAV
(0.18), therefore install at least 2 appropriate measures in the room.
QLAV
70
65
a
60
55
50
45
40
35
30
25
20
15
10
5
0
0
50
100 150
200 250 300 350
400
450
12‒2 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
value for QLMV, provide a mechanical ventilation in
accordance with EN 378-3:2016.
12.2
Opening and closing the unit
12.2.1
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
To gain access to the unit, front plates need to be opened as follows:
1 Remove the screws of the small front plates.
CO₂ Conveni-Pack outdoor unit and capacity up unit
...the number of appropriate
measures must be at least...
0
1
2
Value CANNOT be exceeded!
2
, use
2
and the room height
2
3
×2.5 m=625 m
)
QLMV
RCL
b
c
d
500
550
600 650 700 750 800 850 900 950 1000
B (m³)
3
) exceed the
LRYEN10A7Y1+LRNUN5A7Y1
4P605461-1B – 2020.08
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