Zehnder Rittling ComfoAir 70 User Manual page 14

3.3.1.1 Replacing the air filter
NOTE
The ventilation unit must not be operated without filters. During filter maintenance, the unit needs to be transferred to
the Standby operating mode.
The ventilation unit is equipped with two air filters of filter class ISO Coarse 70% as standard. Retrofitting with filters of filter
class ISO ePM10 80% is possible, preferably the higher quality ePM10 filter is inserted into the lower filter compartment
as an outdoor air filter. No tools are needed to change the air filter. Proceed as follows with the relevant filter maintenance
LED signal:
1. Put the unit into the Standby operating mode.
2. Remove the upper design cover by pulling it out of the guides in an upwards direction.
3. Use your finger to go into the recess between the filter cover made of cellular rubber and the EPP housing, and pull
the filter cover out.
4. Gripping the pulling tabs, pull the filter carefully out of the filter compartment.
5. Using the directional arrow of the filter label pointing to the centre of the unit, insert the new filter into the filter
compartment. Make sure that the filter is not pushed into the housing with force.
12
Filter compartment for extract air filter ISO Coarse
Filter compartment for outdoor air filter ISO Coarse or
ISO ePM10