S&P SILENT CHZ DESIGN Manual De Instrucciones página 15

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.
"Interval" functions
This function is useful when the ex-
tract fan is installed in very wet (near
the sea) or the ambiance exceeds the
set level for a very long time. To pre-
vent the fan to run for hours without
stopping, the "Interval" function al-
lows the fan to switch off automatical-
ly one hour after it began to run. The
extractor keeps switched off during
the set time for interval function. If the
humidity level is still above the set lev-
el when the time interval is over, the
extract fan switches on again and run
during one hour. To select this func-
tion put the dip-switch 1 to position
"ON".
To adjust the set time for interval
function, use the dip-switches 2 and
3.
When, on the contrary, the extract
fan never switches on because the
humidity level is always very low or
it is improperly installed (above heat-
ing appliance, behind a door, in an
area with no air movement) putting
the 1 dip-switch interval function to
position "ON", the fan switches on
automatically during 1 hour and then
it keeps switched off during the set
time for interval function. This func-
tion causes the fan to run whatever
the humidity level.
To select this function put the dip-
switch 1 to position "ON".
To adjust the pre-set time for inter-
val function, use the dip-switches 2
and 3.
Automatic operation with external
switch to override the extractor
(Fig.3) (Fig.7)
The extractor is connected to the
main supply with three wires.
Operation as previous "Automatic op-
eration", with the facility to override
the humidistat by means of the light
switch when the humidity level in the
room is lower than the selected level.
In this case the extractor continues
to operate for the selected period of
time (over-run timer) after the switch
light has been switched off.
ATTENTION: When the humidity rate
is above the selected value, the au-
tomatic option takes precedence
over the manual and the unit cannot
then be switched off using a switch.
Start-up timer function
In this operation, the "start-up timer
function" allows to delay the extractor
start-up for a period of 50 seconds.
So that, for example, the fan does not
switch on if the usage time of the bath-
room is less than 50s. If you exceed
the 50s and the humidity level in the
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