De Dietrich DTG 320 Eco.NOx Manual Del Usuario página 26

4. Adjusting the starting progressiveness
(or initial flow) :
Progresseveness is factory-set to the minimum (low
starting pressure).
Depending on the installation conditions, one may be
led to adjust the progressiveness setting in order to
ensure an optimal start of the boiler.
Proceed as follow :
- Unscrew protection cap G, turn it over and use it as a
key to turn adjusting spindle H until obtaining the initial
GB
flow required.
Counter-clockwise rotation increases the initial flow,
clockwise rotation decreases it.
- After adjustment, put cap G back in place.
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