93-520-20 Issue 3.3
Page 21 of 60
CirrusPro Engineer’s Manual
3.2.9 Accept Airflow
If the unit is a Pro 100 or Pro 200 (non scanning) then only one airflow will be enabled.
Select ‘Ignore’ for any pipes not connected.
The Air Speed should be set to the value given on the Pipe Calculation results, except on the
CirrusPro X4 where it should always be at 100%.
On the left are the current values of the airflow monitoring. The target values are usually between 30
and 50% (accepted values are15-85%). These values are given as a percentage of the assumed
maximum rate with the blower running at full speed. The ‘Air speed’ setting should be similar to that
suggested by the pipe calculation program.
The value entered in the ‘% Fault Level’ is the change in airflow that needs to occur before generating
an Airflow Fault. Airflow Faults are ignored if the Ignore checkbox is checked.
When the airflow has stabilised, after at least 5 minutes, to acceptable values the ‘Accept’ Button is
clicked. A copy of the current value is copied into the right hand side of the display and a measure of
the difference is calculated. This can be viewed by using ‘Accept Airflow’ again.
If the pipe work is very short the blower speed can be reduced to achieve these values, however, the
transit times of the particles must always be checked. See Section 3.2.15 Transport Time.
3.2.10 Learn Environment
Not available