Instruction Manual
Negative Pressure Unit green dec G 700
Version 3
Page 28
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.
8.1. Information on filter change
The frequency of the filter change depends on the degree of contamination of the filters.
As the filter occupancy is increased (contamination of the filters), the air performance
decreases. For filter monitoring, the filter pressure is shown in the display of the control
system. If the display reaches the red area, please replace pre or bag filter first. If the
display value drops by 100 Pascal or more, the unit can be operated again. If the value
drops by less than 100 pascals, the HEPA filter must be replaced.
Important: Only use approved filters!
filter pressure
