Just purchased a home with a pellet stove. This will be my first experience with a pellet stove and I'm looking forward to using it. The stove appears to be an older style unit. Unfortunately, I'm unable to locate a manufacturer's tag on the stove and it appears to have a simple manual control system. A simple on/off switch and two dials. One dial is labeled % On and the 2nd dial is labeled % Off. Both dials go from 0% to 100%. Please see picture attached. Any information on these controls would be appreciated. Thanks