RE-DM 6 Radia Eclipse dimmer circuit schematics

How is it wired? Are you feeding it with a single branch circuit or two (jumper removed)? If two circuits are the two circuits on the same phase as the data sheet drawing indicates? In a single phase 120/240v breaker box opposite phases are side by side where as to supply the device with the same phase requires skipping a breaker like the illustration shows. Typically you don't do this especially if using a multi wire branch circuit to feed the device like a 12/3 (black, red, white, ground) since that can overload the common (neutral, white), opposite phases cancel the neutral current where as same phase would double the neutral current. If you're using a 3 phase electrical system then you need to skip two breakers, at least here in the US, other countries AC distribution differs greatly.

Of course you also have phase concerns on the load side whether the load requires leading edge or lagging edge dimming (forward or reverse phase), typical the difference between an electronic low voltage dimmer and a magnetic/incandescent dimmer.