S&P SILENT DUAL Serie Mode D'emploi page 11

The SILENT DUAL is suitable for wall or ceiling
mounting and can either extract directly to at-
mosphere or via a ducted system (fi g.2).
The SILENT DUAL is provided with a
!
PIR (passive infra-red) detector. To
work properly, the extractor must be
installed in such a way that detection
can be carried out easily, avoiding
the situations indicated in fi g.3.
The unit can be mounted on the wall or ceiling
using the 4 raw plugs and the screws provided.
Make a hole in the wall or ceiling of diameter:
• SILENT DUAL-100: 105 mm.
• SILENT DUAL-200: 125 mm.
• SILENT DUAL-300: 160 mm.
If the unit is to be installed in a ducted system,
use the following standard diameter of duct:
• SILENT DUAL-100: 100 mm.
• SILENT DUAL-200: 125 mm.
• SILENT DUAL-300: 150 or 160 mm.
Ensure that there are no obstructions to the
airfl ow and that the impeller turns freely.
Fix the extractor to the wall in such a way that
it is not distorted in order to avoid noise ge-
neration or problems with the rotation of the
impeller.
The SILENT DUAL is an extractor designed to
operate either continuously at low speed or
that can be used for intermittent operation (see
section "operation")
In continuous operation, the backdraught (5)
shutter is not necessary and can be removed.
If it works intermittently, keep the backdraught
shutter in place and make sure it opens freely
and has not been damaged in transit.
Introduce the mains cable through the cable
entry (4) and fi x it to the wall.
ELECTRICAL CONNECTION
The SILENT DUAL is an extractor designed for a
single-phase supply, with voltage and frequency
as indicated on the rating plate of the unit.
The units are manufactured with double elec-
trical insulation (Class II) and therefore they do
not need an earth connection.
The electrical installation must include a dou-
ble pole switch with a contact clearance of at
least 3 mm.
Once the cable has been connected proceed
using the electrical wiring diagram fi g.4.
For the extractor fan to work pro-
!
perly, it must be permanently powe-
red.
OPERATION
The SILENT DUAL is an extractor fan equipped
with a PIR (passive infra-red) detector and a hu-
midity sensor. This sensor permanently controls
the humidity level of the room where it is insta-
lled, automatically adapting the start-up thres-
hold and the speed of the extractor according to
the real environmental conditions throughout
the day and peaks in humidity (showers).
The humidity control takes priority
!
over the PIR detector.
The PIR detector has priority over
the permanent control of the envi-
ronmental conditions.
Depending on the initial setting, you can choo-
se between two operation modes, either inter-
mittent or continuous.
Intermittent operation
To select this operation, place the
dip-switch "1" in the "ON" position.
The extractor fan will stop.
The extractor starts automatically when a slow
increase in humidity is detected. It starts at a
speed that is in direct proportion to the humi-
dity level in the room until the level returns to
the start-up threshold.
The extractor also starts automatically at me-
dium speed (75% of the maximum speed) when
movement is detected and will continue to ope-
rate for the length of time set by the adjustable
"run-on" timer, after being triggered by the
PIR.
Two set periods are available: 2 minutes (ba-
throoms less than 4 m
2
throoms over 4 m ).
2
) and 15 minutes (ba-
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