Here is something I wrote in a different post.
The min and max are not a function of temperature control. They are just like the idle setting and throttle stop on your car. The min is only used to maintain a fire setting it as small as you can so extra heat is not going into the room. It can also be used if your draft is minimal because the chimney does not maintain enough heat to create a strong enough draw. Because the convection fans are not running more heat will go up the chimney so if you have a good chimney or a powervent getting the fire as small as possible when idling will save fuel.
The max is used to get the max heat from the stove or like the throttle stop. When the FR is at 99 you want to see a full bed of hot coals with only ash dropping into the ash pan. Both Min and Max are seconds out of a 100 second cycle relating to only the feed motor run time.
The feed rate is a percentage of convection fan speed and Max value. Feed rate is like the cruise control on your car if you come to a hill it will add more throttle if it still is loosing speed it will add more throttle, if your throttle stop / (Max) is to low you will run out of power and not be able to keep up. So getting the min and max set properly in the beginning is important to getting proper operation. Once they are set they should rarely be changed throughout the season unless coal size or quality were to change drastically. Example going from rice to buckwheat you will need to raise values.
The only thing you should be changing that will effect FR is the setpoint temp. Try not to ask the stove to make drastic temperature changes no more the 2 or 3 degrees at a time. I recommend not using any set back between day and night.