12 Unit installation
Installation and operation manual
18
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
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
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
3
) exceed the
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
1
Remove the screws of the small front plates.
a
b
8×
3×
a
Outdoor unit
b
Capacity up unit
2
Remove the front panels.
a
b
4×
12
×
a
Outdoor unit
b
Capacity up unit
3
Remove the small front plates of each removed front panel.
1
1
1
2
2×
1×
a
b
2
a
(If applicable) Small front plate left
b
Small front plate right
Once the front plates open, the electrical component box can be
accessed. See
"12.2.2 To open the electrical component box of the
For service purposes, the pushbuttons on the main PCB (located
behind the middle front panel) need to be accessed. To access
these pushbuttons, the electrical component box cover does not
need to be opened. See
"16.1.2 To access the field setting
12.2.2
To open the electrical component box of
the outdoor unit
NOTICE
Do NOT apply excessive force when opening the
electronic component box cover. Excessive force can
deform the cover, resulting in entering of water to cause
equipment failure.
Electrical component boxes of the outdoor unit
The electrical component boxes behind the left, middle and right
front panel are all opened in the same way. The main switchbox is
installed behind the middle panel.
12
×
Electrical component box of the capacity up unit
4×
12.2.3
To close the outdoor unit
NOTICE
When closing the outdoor unit cover, make sure that the
tightening torque does NOT exceed 3.98 N•m.
