• Check the mounting screws and tighten if necessary.
7.3.2 Changing Extract air filter
The bag filter cannot be cleaned and must be changed when necessary. New filters can be ordered from
Systemair. Operation time between filter changes depends on the air pollution at the installation site. A
differential pressure switch indicates when it’s time to change the filters. This will trigger an alarm in
the control panel.
Caution
• A high concentration of dust collected the bag filter and the unit might be harmful to health. It is
recommended to use the air-purifying respirator during maintenance and cleaning.
There is one pair of filters in the unit. Filters are taken out by releasing the filter locking handle after which
filters can be taken out and replaced.
7.3.2.1 Supported filter types
Unit
model
Filter class
Dimensions
Quantity
15
490x392x520
2
20
592x490x520
2
25
592x592x520
2
Optionally, F7 class filters can be used instead of M5 for extract air filtering.
7.3.3 Cleaning the unit
During long term operation dust and grease may slowly build up inside the unit. The unit should be cleaned
once a year when operating under normal air conditions with no special hygiene requirements. Clean the
unit with a dry cloth or use water mixed with non corrosive cleaning medium. Any corrosion should be
cleaned off immediately and the surface treated. In special operating conditions the unit shall be cleaned
more frequency than required. Cleaning medium and method should be adapted to the relevant conditions.
Operation and Maintenance Instructions
209531
27
Systemair AB
