SYSVRF2 IM
8
4.7 Outdoor unit ducting
Fig.4-17
Remark
Factory default
Customization option
Static pressure
0 Pa
0-20 Pa
Above 20 Pa
Remove steel mesh and connect to
duct < 3m long
Fig.4-16
h
h-H
H
If the particular circumstances of an installation require a unit to be
placed closer to a wall. Depending on the height of adjacent walls
relative to the height of the units, ducting may be required to ensure
proper air discharge. In the situation depicted in Figure 4-17, the
vertical section of ducting should be at least H-h high. If the outdoor
unit needs ducting and the static pressure is more than 20Pa, the
units should be customized for the corresponding static pressure.
A
B
C
D
>45°
>1000 mm
>300 mm
Airflow deflector
Front view
(one outdoor unit)
B
A
B
A
C
D
Side view
(one outdoor unit)
B
A
Front view
(two outdoor units
combined)
Front view
(three outdoor
units combined)
If obstacles are around the outdoor unit, they must be 800mm
below the top of the outdoor unit. Otherwise, an mechanical
exhaust device must be added.
Before installing outdoor unit ducting, be sure to remove the
unit’s steel mesh cover, otherwise airflow will be adversely
affected.
Each duct should contain no more than one bend.
Vibration isolation should be added to the connection between
the unit and the ducting to avoid vibration/noise.
Installing louvers is required as doing for safey, they should be
installed at an angle no greater than 15° to the horizontal, to
minimize the impact on airflow.
If more than one outdoor units need ducting, each outdoor unit
should has independent ducting, it cannot share one ducting
for more than one outdoor units.
Outdoor unit ducting design should take account of the following:
Fig.4-18
Fig.4-19
Ducting for 8-12HP
Option A – Transverse ducting
Option B – Longitudinal ducting
A≥300
B≥250
731≤D≤770
C≤3000
A
B
C
D
E=A+731
E
θ
≤15°
θ
Support
Radius
E
Air outlet louver
A
C
B
90
100
750
731
Radius
Remove the
steel mesh first
8 ST3.9
self-threading screws
704
Remove the
steel mesh first
8 × ST3.9
self-threading screws
Air outlet louver
90
100
Support
Radius E
A
C
B
750
Radius
D
A≥300
B≥250
D≥750
C≤3000
A
B
C
D
E=A+750
E
θ
≤15°
θ