For my Enviro M55, I got a LUX TX500E with swing set capability. It does not mention Pellet stove use but I looked up other T-Stats before I bought this one and none mentioned Pellet stoves. Per the instructions It seemed like I was to hook the Red wire to RH and the white wire to W. (For a two wire) install! The "jumper" wire is preinstalled RH to RC. The instructions also mentions the B and O terminals but said they are usually used only for Heat Pumps. I also checked our oil burner T-Stat (which runs fine) and it is set up the same way as above. I made sure the stove was set to auto, and the new T-Stat on Heat. The stove does not turn on........Why? Thanks in advance.....Bill