Fusion generators always create output steam at the fluid’s default temperature (15 °C). There isn’t a prototype field that sets leftover steam to 110 °C.
The script forces the output to 280 °C so that, after it mixes with the fresh 15 °C steam the machine keeps producing, the pipe settles at about 110 °C. It just happens to land on that unless the pipe is empty - back to 15°
I haven’t seen bugs on my side, but I’m not publishing it as a proper mechanic. If you want to try it, grab the 1.0.4 zip from the link above and see if it works with the other mod.