DF Series installation manual
16
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e.
If the airflow rate measured is within specifications and, if the pressure
differential read is greater or smaller than the desired pressure drop, the
adjustment plates of the burner have to be repositioned (see figure 2).
WARNING:
Shut off power supply before making any adjustment.
f.
If the differential pressure reading is lower than the desired value, reduce the
opening of the profile plate by moving the adjustment plates closer to the
burner.
g.
If the differential pressure reading is higher than the desired value, enlarge the
opening of the profile plate by moving the adjustment plates away of the
burner.
NOTE:
For a single volume system, adjustment plates should be at an equal
distance from the burner.
h.
Read the differential pressure again and repeat operations "f" and "g" as
necessary.
NOTE:
The adjustment plate must not be used to adjust the final system airflow
rate. When the airflow rate requires adjustment, changing or adjusting the
blower and motor pulleys may be required.
Figure 2
