Barometric Damper and Draft Inducer settings

I am very new to the Coal Stoker forum but from what I have read so far, most of you seem as excited about this stuff as I am now becoming. I recently purchased a used Leisure Line Hyfire II and the setup and operation was so much simpler than I expected, but I still have some questions on the not so simple settings of the Barometric Damper and Draft Inducer settings.

I use the included TS2 Coal-trol, which has operated the Hyfire temperature, coal feeder and blowers perfectly by simply adjusting the temperature on the Coal-trol.

I don't have any tools to take readings of the CO2 or other draft measurements over the fire or in the combustion chamber to know how to set the Barometric Damper. Also I presume all change based on how the stoker is operating; low maintaining the temp vs. high increasing the temp.
Q1 - In general, should the Barometric Damper barely open (bounce just a little bit) when operating in normal conditions (stove maintaining existing temp.)?

Q2 - I also installed a DI-2 Draft Inducer because my chimney is only 5", so I purchased it before testing anything presuming it would be necessary, specifically since I am using the Hyfire II with both burners running near full output (180,000 BTUs) to heat my 3800 sqft house. I attached it to the end of the exhaust pipe just in front of where it connects to the 6" to 5" neck-down duct adapter at the chimney. It is currently about 2' up from the Barometric Damper. It has a rheostat to control the air flow / fan speed but I don't know what is ideal or what signs I should look for to know how low or high it should be set. Set on low, medium or high it does not seem to affect the stoves performance either way, presumed because the Hyfire II blowers are doing what they are supposed to do. But I want to be sure I am not wasting heat by sucking too much hot air from the stove unnecessarily or also running the DI-2 unnecessarily, wasting electric and motor life.

I appreciate any advice from all Stoker enthusiasts, specfically the awesome Leisure Line Hyfire II folks like myself.

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Barometric Damper and Draft Inducer settings