Envirovent SILENT-100 DESIGN Instruction Leaflet page 10

damaged in transit. Introduce the
mains cable through the cable entry
(4) and fix it to the wall.
Connect the electrical wiring as set
out below and then mount the protec-
tion grille (1).
ELECTRICAL CONNECTION
The SILENT DESIGN is an extractor
fan designed for a single-phase su-
pply, with voltage and frequency as in-
dicated on the rating plate of the unit.
The units are manufactured with dou-
ble electrical insulation (Class II) and
therefore they do not need an earth
connection.
The electrical cable must enter the SI-
LENT DESIGN through the cable entry
(4). The SILENT DESIGN must be con-
nected to the electrical supply in ac-
cordance with local wiring regulations.
Once the cable has been introduced
proceed using the electrical wiring dia-
gram applicable to the selected model.
SILENT S DESIGN
For these models, use the following
diagrams:
Fig.3: Switching the extractor through
the light switch.
Fig.4: To switch the fan through an in-
dependent switch.
SILENT T DESIGN
This model is provided with an adjus-
table over-run timer. The timer allows
the fan to continue to operate for the
selected period after the switch has
been turned off (fig. 6).
10
Fig.5 shows how to connect the fan
with timer utilising the same switch
as for the lighting circuit.
To set the timer, turn the potentio-
meter on the printed circuit board as
(fig. 7).
• To reduce the "run on" time, turn
anticlockwise (min. 1 minute).
• To increase the "run on" time, turn
clockwise (max: 30 minutes).
SILENT HT DESIGN
IMPORTANT: Do not remove the tape
covering the humidity sensor located
on the reserve of the grille.
Models provided with an electronic
humidistat which can be adjusted
from 60% to 90 % RH (Relative Hu-
midity) and with a timer, adjustable
between 1 and 30 minutes.
The desired humidity level and run
on time are selected by means of 8
dip-switches placed on the printed
circuit board, and easily accessible.
Each dip-switch has two positions
[ON (1) and OFF (0)] which are selec-
ted with the small plastic screwdriver
supplied with the fan (fig.10):
The functions of these dip-switches
are:
• Switch 1: "Interval" function selec-
tion (yes or no)
• Switches 2 and 3: Interval time set-
tings between 4, 8, 12 and 24 hours