Hello from France ( & sorry for my bad english
)
I have a MultiHeat 4.0 and working with wood pellets until this summer.
This year, the boiler runs with wood chips but the original screw motor was too weak (220v, 0.37kw), so i replaced it with a 380/0.55kw with a 220/380 frequency converter, working well !!
Please find some pictures (installation not completed, in testing... !)