Daikin ERA250AMYFB handleiding
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13 Special requirements for R32 units
Installation and operation manual
21
ERA200~300AMYFB
Inverter outdoor unit for AHU option kit and air curtains
4P780153-1 – 2024.07
4 In particular situations it is mandatory to install a remote
controller at a supervised location.
In room: master remote controller in fully functional OR alarm
only.
In supervisor room: supervisor remote controller.
a
d
e
f
b
a Outdoor unit
b Compatible air curtain
c Remote controller NOT compatible with R32 safety
system
d Remote controller compatible with R32 safety system
e Remote controller in supervisor mode
f Supervisor room
NOT allowed
Allowed
Natural ventilation
Natural ventilation is a safety measure where ventilation is made to a
place where sufficient air is available to dilute the leaked refrigerant
such as a large space.
The natural ventilation safety measure can be applied by following
the steps below:
Step 1 – Determine total room area, which is the total area of the
space that has natural ventilation and the space in which the air
curtain is installed/serving:
The respective room area can be determined by projecting the walls,
doors and partitions to the floor and calculating the enclosed area.
Spaces connected only through false ceilings, ductwork, or similar
connections are not considered a single space.
Step 2 – Use the graph or table below to determine the total
refrigerant charge limit:
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
50 25 30 35 40 45 50 55 60 65201510 70 75 80
m
[kg]
A
1
+ A
[m
2
]
A
1
+
A
[m²]
m
[kg]
20 6.7
30 10.1
40
0 0
10 3.3
13.5
50 16.8
60 20.2
70 23.6
80 27.0
90 30.3
100 33.7
110 37.1
120 40.5
130 43.9
140 47.2
150 50.6
160 54.0
170 57.4
180 60.7
190 64.1
200 67.5
210 70.9
220 74.2
230 77.6
236 79.6
237 79.8
240 79.8
250 79.8
m Total refrigerant charge limit in the system [kg]
A
1
Area of the room with natural ventilation [m²]
A Area of the room where an air curtain is installed/serving
[m²]
Note: Round down the derived values.
The graphs and table are based on an installation height of the air
curtain between 1.8m and 2.2m (bottom of air curtain or bottom of
duct openings).
If the installation height is more than 2.2 m, higher total refrigerant
charge limit of the system can apply. To know the total refrigerant
charge limit of the system in case the installation height is more than
2.2m, refer to the online tool (VRV Xpress).
Step3 – The total amount of refrigerant in the system MUST be less
than the refrigerant charge limit derived from the graph above. If
NOT, natural ventilation safety measure is not allowed.
Step4 – The partition between two rooms on the same floor MUST
meet one of the following two requirements for natural ventilation.
1 Rooms on the same floor that are connected with a permanent
opening that extends to the floor and is intended for people to
walk through.
2 Rooms on the same floor connected with permanent openings
that fulfil the requirements listed below. The openings must
consist out of two parts to allow air circulation for natural
ventilation.
A
nvmin
≥
20
mm
≥
50%
A
nvmin
≤
100 mm
1500
mm
300
mm
200
mm
≥
20
mm
A
nvmin
Minimal natural ventilation area
For the lower opening:
▪ It is not an opening to the outside
▪ The opening cannot be closed
▪ The opening must be ≥0.012m² (A
nvmin
)
▪ The area of any openings above 300mm from the floor does not
count when determining A
nvmin
▪ At least 50% of A
nvmin
is less than 200mm above the floor
▪ The bottom of the lower opening is ≤100mm from the floor
▪ The height of the opening is ≥20mm
For the upper opening:
▪ It is not an opening to the outside
▪ The opening cannot be closed
▪ The opening must be ≥0.006m² (50% of A
nvmin
)
▪ The bottom of the upper opening must be ≥1500 mm above the
floor
▪ The height of the opening is ≥20mm
Note: The requirement for the upper opening can be met by false
ceilings, ventilation ducts or similar arrangements that provide an
airflow path between the connected rooms.
Example
The total amount of refrigerant in the ERA system is 7kg. The ERA
system has an air curtain which is installed in a space that does not
belong to the lowest underground floor of the building. The space in
which the air curtain is installed has a room area of 10 m². An
adjacent room has a room area of 40 m² to which air circulation is
possible through a partition that meets one of the two requirements
in the above text. The available safety measure is Alarm + Natural
ventilation (based on the total amount of refrigerant and room area
from the graph for “All other floors”).
1 To apply the Alarm safety measure, see "Alarm"[420].
2 In addition, apply the Natural ventilation safety measure: total
room areas of installed room and adjacent room where natural
ventilation can be made: A+A
1
=10m²+40m²=50m²
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Productinformatie
| Merk | Daikin |
| Model | ERA250AMYFB |
| Categorie | Ventilator |
| Taal | Nederlands |
| Grootte | 8144 MB |
