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Special requirements for R32 units
Installer and user reference guide
44
BS4~12A14AJV1B
VRV 5 branch selector unit
4P695527-1 – 2022.02
(c)
No safety measure (=No safety measure)
(d)
External alarm (=External alarm)
(e)
Ventilated enclosure (=Ventilated enclosure)
Use the total amount of refrigerant in the system and the area of the room in
which the BS unit is installed to check which safety measure is required.
Note:
Above a system charge of 42.2 kg, it is not allowed to use "No safety
measure" for the BS unit.
Note:
When "No safety measure" is required, it is still allowed to install an external
alarm or ventilated enclosure if wanted. Follow the respective instructions as
described further below.
Note:
When an external alarm is required as safety measure, it is also allowed to
install a ventilated enclosure. Follow the instructions described further below.
Use the second graph (Lowest underground floor
(b)
) in case the BS unit is installed
in the lowest underground floor of a building. For other floors, use the first graph
(All other floors
(a)
).
OTHER FLOORS
LOWEST UNDERGROUND FLOOR
The graphs and table are based on an installation height of the BS unit between
1.8 m and 2.2 m. The installation height is the height of the bottom of the BS unit
to the floor. See also
"14.1.1 Installation site requirements of the unit"
If the installation height is more than 2.2 m, different boundaries for the applicable
safety measures can apply. To know which safety measure is required in case the
installation height is more than 2.2 m, refer to the online tool (
NOTICE
BS units cannot be installed lower than 1.8 m from the lowest point of the floor.
Example
The total amount of refrigerant in the VRV system is 20 kg. All BS units are installed
in spaces that do not belong to the lowest underground floor of the building. The
space in which the first BS unit is installed has a room area of 125 m², the space in
which the second BS unit is installed has a room area of 70 m² and the space in
which the third BS unit is installed has a room area of 15 m².
▪
Based on the graph for "All other floors" (All other floors), the room area limits
are as follows:
A
min
"No safety measure" (No safety measures)
118 m²
"External alarm" (External alarm)
59 m²
▪
This means that the following safety measures are required:
