Renfert SILENT EC2 Manual Del Usuario página 42

5.5 Operation with the SILENT flow sensor
If the extraction unit is operated in combination with a flow rate monitoring unit such as the SILENT flow
sensor, the following must be observed:
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► If the flow rate is less than the defined threshold value for a certain period, this is detected by the
SILENT flow sensor, the corresponding indicator begins to flash, and a warning tone is output
every 30 seconds.
If the flow rate is too low at the suction point being monitored, safe operation is no longer guaran-
teed and the level of exposure to dust can be harmful to health!
In this case, the following measures must be taken:
⇒ Stop working at all suction points of the affected extraction unit� This applies to the individual suction
channels of any multi-workbench extraction unit as well as to all suction points operated via a Y-junction
or via extractor switches�
⇒ Determine why the flow rate is too low and resolve the issue.
Suction level is too low
Filter blockage
Cleaning the filter does not result in the expected
improvement.
Blockage in the suction point (suction mouth)
Blockage in the suction line
Leakage in the section of the suction line between
the SILENT flow sensor and the extraction unit.
Determining the cause and measures can be carried out in the order shown�
After every measure, you should switch on the extraction unit again and check whether the minimum flow
rate is again exceeded so that correct operation is possible again�
⇒ Work should only resume after the fault has been rectified and the minimum flow rate is exceeded
again�
6 Cleaning / Maintenance
The device does not contain any parts that require maintenance.
Opening the device other than described in the instructions is not permitted!
6.1 Cleaning
To clean the device wipe only with a damp cloth�
Do not use and solvent-based or abrasive cleaning agents�
Cause
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Measure
• Choose a higher suction level
• Clean the filter.
• Replace the fine filter.
• For low-dust replacement of the fine filter, observe
Chapter 6�3�
• Disconnect the suction hose at the suction point and
check whether there is a blockage in the suction point;
remove where appropriate�
• Check the suction line at all disconnection points / ser-
vice openings section by section for blockages�
• Check the installation of the SILENT flow sensor in
accordance with its instructions�