The Low Feed Adjustment is used to change the feed rate for your #1 heat level setting. It will not affect the feed rate of any of the other heat levels. Only the #1 heat level feed rate is affected.
When the pellet stove is on the #1 setting, you can adjust the feed rate by pushing the Low Feed Adjustment button. This will cause the 1 & 4 light to be displayed on most units. This is the highest feed rate setting for the #1 heat level; it is still less than the #2 setting. You will be feeding just over a pound of fuel an hour to the fire. If you push the Low Feed Adjustment again, the 1 & 3 light will be displayed. This is the lowest possible feed rate for the #1 heat level, and you will be feeding just a little less than one pound of fuel an hour. Press the Low Feed Adjustment button again, and just the #1 light will be displayed. This is the factory normal feed rate and is approximately 1 pound of fuel an hour.
This option is available because different sized pellets will pack into the auger differently. If you find yourself feeding too few pellets to the fire on the #1 setting, you can increase the feed rate; too many, and you can reduce it.
Most people will never need to use this feature of the stove. However, in some circumstances it is a good feature to have.
Whenever using the pellet stove with a thermostat on the High/Low mode we do recomend changing the Low Feed rate to the highest setting.