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Special requirements for R32 units
Installer and user reference guide
65
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
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 ≥0.012 m² (A
nvmin
)
-
The area of any openings above 300 mm from the floor does not count when
determining A
nvmin
-
At least 50% of A
nvmin
is less than 200 mm above the floor
-
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
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.
NOTICE
Indoor units cannot be installed lower than 1.8 m from the lowest point of the floor.
Step 2
– Use the table below to determine the maximum total indoor unit capacity
(sum of all connected indoor units) that is allowed for a single BS unit branch pipe
port.
Room area [m²]
Maximum total indoor unit capacity class
1 indoor unit per
branch pipe port
(a)
2~5 indoor units per branch pipe port
40 m after 1
st
branch
(b)
90 m after 1
st
branch
(c)
≤6
—
—
—
7
10
—
—
8
15
—
—
9
32
—
—
10
32
—
—
