93-520-20 Issue 3.3
Page 49 of 60
CirrusPro Engineer’s Manual
4.4.1 Cleaning the Airflow Board
The airflow board is found in the flow path in the manifold of all models. In order to clean the airflow
sensors it is necessary to release the manifold and drop it away from the sampling pipe.
There are two or four screws holding the manifold in place depending on the model. Remove the
power to the system and then remove the screws.
Key
Recessed Mounting Screw
Air flow board
Diagram Showing The Three Types of Manifold Mountings
The airflow measuring thermistors can be seen from the top of the manifold.
A small brush should be used to brush away any accumulated dust particles.
Refit the manifold and check the airflow. See Section 3.2.9 Accept Airflow.
Save the new accepted values.
