Daikin SV1A25AJV1B User Reference And Installation Manual page 51

SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
The graphs and table are based on an installation height of the SV unit between
1.8 m and 2.2 m. The installation height is the height of the bottom of the SV unit
to the floor. See also "14.1.1 Installation site requirements of the
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 2.2 m, refer to the online tool
Xpress).
Step 3 – 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.
Step 4 – 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
≤ 100 mm
A Minimal natural ventilation area
nvmin
For the lower opening:
- It is not an opening to the outside
- The opening cannot be closed
- The opening must be ≥0.012 m² (A
- The area of any openings above 300 mm from the floor does not count when
determining A
nvmin
- At least 50% of A
nvmin
- The bottom of the lower opening is ≤100 mm from the floor
- The height of the opening is ≥20 mm
For the upper opening:
- It is not an opening to the outside
- The opening cannot be closed
- The opening must be ≥0.006 m² (50% of A
- The bottom of the upper opening must be ≥1500 mm above the floor
- The height of the opening is ≥20 mm
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.
13 Special requirements for R32 units
|
≥ 20 mm
≥ 20 mm
nvmin
≥ 50% A
nvmin
)
nvmin
is less than 200 mm above the floor
nvmin
4
unit" [ 63].
)
Installer and user reference guide
(VRV
51