How does the LFL works?

Hello, since you already have installed LFL1.322 I have one question about the control of the air dumper. We are upgrading an old automation panel and when I read the old schematics I saw that for the control dumper they used 2 digital outputs in order to open and close the air dumper.

What is not clear for the is that they told me that the air dumper is controlled with PWM pulses and when I read the documentation for the LFL1.322 I didn't find anything about that. I need to be sure about how the LFL works to don't produce downtime when we switch the old panel with the new one.

If anyone could clear this aspect for me I would be very thankful.

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Split from parallel connection of 2 UV detectors QRA with Gas burner controller LFL1.322E.

Closed cause question posted twice.

The second thread with the subject The control of the air dumping valve for LFL1.322-Gas burner control is published within the conference HVAC Products.