4 Unit installation
Installation manual
7
EKHWET90~120BAV3
R32 Split series – Domestic hot water tank
4P680074-1 – 2021.11
PATTERN 2
PATTERN 2: Conditions ventilation openings
If you want to take advantage of the floor area of the adjacent room, you must provide 2 openings (one at the bottom, one at the top) between the rooms to
ensure natural ventilation. The openings must comply with the following conditions:
▪
Bottom opening (A
nv
):
▪ Must be a permanent opening that cannot be closed.
▪ Must be completely located between 0 and 300 mm from the floor.
▪ Must be ≥A
nv-min
(minimum bottom opening area).
▪ ≥50% of the required opening area A
nv-min
must be ≤200 mm from the floor.
▪ The bottom of the opening must be ≤100 mm from the floor.
▪ If the opening starts from the floor, the height of the opening must be ≥20 mm.
▪
Top opening:
▪ Must be a permanent opening that cannot be closed.
▪ Must be ≥50% of A
nv-min
(minimum bottom opening area).
▪ Must be ≥1.5 m from the floor.
A
B
A
nv
(≥A
nv-min
)
Min. 50%
of A
nv-min
Calculate the total floor area.
(
A
total
=A
roomA
+A
roomB
)
See table 4:
Look up the minimum bottom opening area for natural
ventilation with the adjacent room (
A
nv-min
) for the given refrigerant charge,
the given floor area of room A (
A
roomA
)
[! NOT room A + room B !]
and the
given release height (
H1
).
Is it practically feasible to
create ventilation openings that comply
with
A
nv-min
and with the
"Conditions ventilation
openings"
on previous page)?
See table 1:
Is the total floor area
(Atotal) large enough for the given refrigerant
charge and the given
release height?
Yes
No
No
Yes
You CANNOT install the unit in the room.
Place unit in a larger room or higher position
(see table 2 to select adequate release height)
A
nv
, A
nv-min
A
B
You can install the unit in room A if you create ventilation
openings.
Ventilation openings must comply with
A
nv-min
and with
"Conditions ventilation openings"
on previous page).
2a
A
nv
(≥A
nv-min
)
Min. 50%
of A
nv-min
Start PATTERN 2
