Daikin VRV 5-S Series - Page 66

16 | Special requirements for R32 units
Installer and user reference guide
66
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1D – 2023.02
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
nvmin
)
- 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.
Step 2 – Use the graph or table below to determine the total refrigerant charge
limit in the system for each indoor unit AND for each room served by a ducted
indoor unit.
Determine the value for both the lowest underground floor AND the other floors.
The total refrigerant charge limit depends on the effective installation height,
measured between:
▪ the bottom side of the indoor unit and the lowest point of the floor, in case the
indoor unit is installed in the same room.
▪ the bottom of the duct opening and the lowest point of the floor, for rooms
served by a ducted indoor unit installed in a different room.
Note: If the height for your installation is not shown, use the closest lower height
value in the table. E.g. for an installation height of 2.7 m, use the value
corresponding with height 2.5m of the table.
Refer to the databook for a more detailed table.
NOTICE
Indoor units and ducting cannot be installed lower than 1.8m from the lowest point
of the floor.
Note: The derived charge value should be rounded down.
ALL OTHER FLOORS
Choose the curve 'a' that corresponds to the effective
installation height
Choose the curve 'b' that corresponds to the effective
installation height
LOWEST UNDERGROUND FLOOR