Error Possible cause Corrective action
Dust extractor fails
to start when a dust-
generating device is
being used.
• Dust extractor not switched on.
• Dust-generating device not
plugged into the unit power outlet
on the Silent.
• Wrong operating mode selected.
• Automatic start feature’s threshold
value too high.
• Device fuse has blown.
• Automatic start feature fails to
detect the attached device’s
operation.
• Switch the dust extractor on (Sec. 2.2).
• Connect the dust-generating device to the Silent
(Sec. 1.4).
• Select the automatic mode (Sec. 2.5).
• Adjust the automatic start feature (Sec. 2.6).
• Check the fuse, replace as required.(Sec. 3.4)
• Some older handheld instruments do not generate
a sufciently strong signal for the automatic start
feature. Switch the dust extractor to the continuous
mode.
Dust extractor starts,
although a connected
device is not being
used.
• Automatic start feature’s threshold
value too low.
• Adjust the automatic start feature (Sec. 2.6).
Dust extractor fails to
stop when a connected
device is switched off.
• Dust-generating device not
plugged into the unit power outlet
on the Silent.
• Wrong operating mode selected.
• Activation threshold too low.
• Connect the dust-generating device to the Silent
(Sec. 1.4).
• Select the automatic mode (Sec. 2.5).
• Adjust the automatic start feature (Sec. 2.6).
No satisfactory setting
of the automatic start
feature can be adjusted.
• Some older handheld instruments
do not generate a sufciently
strong signal for the automatic
start feature.
• Switch the dust extractor to the continuous mode.
up when the unit is
switched on.
• Activation sensitivity too low. • Adjust the automatic start feature (Sec. 2.6).
to open.
• Lock bolts dirty. • Clean the lock bolts and lubricate them slightly, if
required.
It is solely intended for commercial use in laboratories
and not for private, household use.
The Silent can be operated both manually as well as
in conjunction with connected, electric, dust-generat-
ing equipment.
One or more extraction points can be connected to
the dust extractor. Suction switches – available as
accessory equipment (refer to the “Accessories” Sec-
tion) – are employed to connect multiple extraction
points.
A.1 Proper Use
Proper use implies the extraction of dry, non-explo-
sive dusts.
Fire-promoting, easily ammable, ammable, or
explosive materials may not be extracted with the
Silent.
The extraction of liquids, smouldering, or burning
materials is prohibited.
Information for Operators
The following information is intended to assist you,
the operator, in safely working with the Silent in your
laboratory.
Using these operating instructions as a
starting point, instruct all operators of the
unit with regard to the area of application,
the possible hazards during operation, and
the proper operation of the dust extractor.
Please have these operating instructions readily
available for the operators.
A. Application Area
The Silent is a workbench extractor used to extract
dusts such as occur in laboratories, e.g., dental labs
(e.g., as generated by dry trimmers or on dust boxes).
The employed lter system shows a precipitation ef-
ciency of 99.9%. This corresponds to dust category
“M” (according to DIN EN 60335-2-69).
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