S&P SILENT Serie Installationsanleitung Seite 14

age 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 in-
stallation drawing/diagram, there must
be an All Pole switch in the fi xed wiring
with a contact opening of min 3 mm.
The electrical cable must enter the SI-
LENT 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 electron-
ic 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 set-
14
tings 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 set-
tings 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 ex-
tractor to operate automatically when
the humidity level in the room is high-
er than the set level. The extractor will
stop automatically when the humidity
drops below the selected level (-5% or
+10%) and after the selected period
set on the over-run timer.
"Interval" functions
This function is useful when the extract
fan is installed in very wet (near the