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12 Special requirements for R32 units
Installation and operation manual
17
BS4~12A14AJV1B9
VRV 5 branch selector unit
4P797565-1 – 2024.11
Step4 – The partition between two rooms on the same floor MUST
meet one of the following two requirements for natural ventilation.
▪ 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.
▪ 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
WARNING
The ventilation openings MUST NOT be blocked.
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 VRV system is 20kg. The VRV
system has one BS unit which is installed in space that does not
belong to the lowest underground floor of the building. The space in
which the BS unit is installed has a room area of 25m². An adjacent
room has a room area of 45 m² to which air circulation is possible
through a partition that meets one of the two requirements in the
above text. The safety measure chosen is External alarm + Natural
ventilation instead of Ventilated enclosure (based on the total
amount of refrigerant and room area from the graph for “All other
floors”).
1 To apply the External alarm safety measure, see
"12.4.2External alarm"[416].
2 In addition, apply the Natural ventilation safety measure: total
room areas of installed room and adjacent room where natural
ventilation can be made: 25m²+45m²=70m²
▪ Total refrigerant charge limit for the system determined using the
graph for natural ventilation is 23.6kg.
Total amount of refrigerant in the system (20 kg) < Total refrigerant
charge limit (23.6kg), which means that the safety measure can be
applied.
Field settings
Natural ventilation
Code Description Value
[2-0]
(a)
Cluster indication 0 (default): disable
[2-4]
(b)
Safety measures 0: disable
(a)
Set on ALL main PCBs (A1P, A2P and A3P) of the BS unit.
(b)
Set ONLY on the LEFTMOST main PCB (A1P) of the BS unit.
Note: For more information, see "16.1Making field settings"[436].
Note: If the natural ventilation safety measure is used in conjunction
with the external alarm safety measure, then the field settings for
external alarm safety measure MUST be made during configuration.
BS unit test run
Before BS unit operation, it is required to perform a test run that
simulates a refrigerant leak. See "17.2 BS unit test run" [4 40] for
more details.
12.4.4 Ventilated enclosure
WARNING
If the ventilated enclosure safety measure is applied, the
BS unit must have its own ductwork and extraction fan. Do
NOT combine this ductwork with ducting for other
purposes.
A ventilated enclosure is required as a safety measure in case other
safety measures (see "12.4.1 No safety measure" [4 16],
"12.4.3Natural ventilation"[416] and "12.4.2External alarm"[416])
are not allowed.
For the ventilated enclosure safety measure, ductwork and an
extraction fan MUST be installed. See "13.5Installing the ventilation
ducting" [4 27] for ductwork (field supply) installation and "15.5 To
connect the external outputs" [4 35] to connect the extraction fan
circuit (field supply) to the BS unit.
WARNING
Keep any required ventilation openings clear of
obstructions.
Note: As an additional safety measure, an external alarm circuit
(field supply) can be installed using the SVS output. See "15.5 To
connect the external outputs"[435].
When the R32 sensor in the BS unit detects a refrigerant leak, it
activates the safety measures. This includes opening the damper of
the unit to allow air to enter, activate the fan output signal to trigger
an extraction fan to operate and evacuate the refrigerant leak, and
display an error message on the remote controllers of the connected
indoor units.
A damper at the air inlet of the BS unit enables a choice between
three types of configurations (see below).
a
a Damper
Respect the following rules:
Bekijk gratis de handleiding van Daikin BS8A14AJV1B9, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | BS8A14AJV1B9 |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 8827 MB |
