Envirovent SILENT DUAL Instruction Leaflet page 8

Cleaning
maintenance shall not be
made by children without
supervision.
Installation (fig.1):
1- Front grille
2- Front grille support
3- Connection terminals
4- Outlet
5- Removable backdraught shutter
6- Cable entry
7- Setting dip switches
The SILENT DUAL is suitable for wall or
ceiling mounting and can either extract
directly to atmosphere or via a ducted
system (fig.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
fig.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 to 107 mm.
- SILENT DUAL-125: 125 to 132 mm.
- SILENT DUAL-150: 160 to 158 mm.
If using the EnviroVent high rise wall kit,
please refer to kit for core drill size
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-125: 125 mm.
- SILENT DUAL-150: 150 or 160 mm.
Ensure that there are no obstructions to the
airflow and that the impeller turns freely.
8
and user
Fix the extractor fan to the wall in such a way
that it is not distorted in order to avoid noise
generation or problems with the rotation of
the impeller.
The SILENT DUAL is an extractor fan
designed to operate either continuously at
low speed or intermittently. (see section
"operation")
In continuous
!
backdraught (5) shutter is not
necessary and can be removed.
If it works intermittently,
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 fix it to the wall.
Electrical connection
The SILENT DUAL is an extractor fan
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
electrical insulation (Class II) and therefore
they do not need an earth connection.
The electrical installation must include a
double pole switch with a contact clearance
of at least 3 mm.
Once the cable has been connected
proceed using the electrical wiring diagram
fig.4.
For the extractor fan to work
!
properly, it must be permanently
powered.
Operation
The SILENT DUAL is an extractor fan
equipped with a PIR (passive infra-red)
detector and a humidity sensor. This sensor
permanently controls the humidity level of
the room where it is installed, automatically
adapting the start-up threshold and the
speed of the extractor according to the real
environmental conditions throughout the
day and peaks in humidity (showers).
operation, the
keep the