Instruction Manual
Negative Pressure Unit green dec
Version 1
Page 50
8. Maintenance
Maintenance work, including changing/removing filters, may only be carried out by
authorised persons wearing suitable protective clothing.
The appliance must be completely disconnected from the power supply during all repairs
and maintenance work.
We expressly refer to possible additional regional and national regulations in the
maintenance of the appliance technology.
The air-conditioning systems (dust extraction unit, industrial vacuum cleaners and devices
used for venting or negative pressurisation) must be serviced as required, at least once a
year, and checked by a qualified technician. The test result shall be presented on request.
Devices with SRE connect control should be checked and calibrated once a year
by the deconta service.
8.1. Information on filter change
The frequency of the filter change depends on the degree of contamination of the filters.
With increasing filter occupancy (fouling of the filters), the air flow decreases
For filter monitoring during operation, a manometer is installed on the device (in case of
the SRE+ and SRE connect, the filter monitoring is shown on the display).
Important: Only use approved filters!
8.1.1. Control SE
The following table shows the display values when the filters are new and the display
values for a recommended filter change. If the display shows the value for the
recommended filter change, first exchange the pre- and intermediate filter. If the display
value drops by 100 Pascal or more, the device can continue operating. If the value falls
below 100 Pascal, the HEPA-filter must be renewed.
