13
EN
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.
In addition to the switch shown in the
installation drawing/diagram, there
must be an All Pole switch in the fixed
wiring with a contact opening of min
3 mm.
The electrical cable must enter the
SILENT through the cable entry (4).
Once the cable has been introduced
proceed using the electrical wiring
diagram applicable to the selected
model.
SILENT CHZ
Models provided with an electronic
humidistat which can be adjusted
from 60% to 90 % RH (Relative Hu-
midity) and with a timer, adjusta-
ble 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 select-
ed with the small plastic screwdriver
supplied with the fan:
The functions of these dip-switches
are:
– Switch 1: “Interval” function selec-
tion (yes or no)
– Switches 2 and 3: Interval time
settings between 4, 8, 12 and 24
hours
– Switches 4 and 5: Humidistat set-
tings between 60, 70, 80 and 90%
– Switches 6 and 7: Over-run timer
settings between 1, 5, 15 and 30
minutes
– Switch 8: Start-up timer function
(yes or no)
Automatic operation
The extractor is connected to the
main supply with only two wires
(Fig.4) (Fig.6). The humidistat causes
the extractor to operate automatical-
ly when the humidity level in the room
is higher than the set level. The ex-
tractor will stop automatically when
the humidity drops below the select-
ed level (-5% or +10%) and after the
selected period set on the over-run
timer.
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