8
3.3
Maintenance instruction
3.3.1
Changing supply/extract air filter
The bag filter cannot be cleaned and must be changed when necessary. New filters can be ordered from Systemair. Op-
eration 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.
When this occurs do the following:
1. Replace the filters with new ones as described below.
2. Press on the alarm symbol
on the control panel.
3. Choose
Filter alarm
and press acknowledge.
3.3.2
Checking the heat exchanger
After a long time of use dust may build up in the exchanger and block the airflow. It is important to clean the exchanger
regularly (once a year) to maintain high efficiency. Wash in hot soapy water or use pressure air. Do not use detergent
containing ammonia.
Caution
• The heat exchanger is sensitive for impacts. Handle with care.
154394 | A001
