I recently changed from a danfoss 2 port motorised value to a myson equivalent. As yet I havent connected the actuator to the controller that controls the boiler/pump etc. Both actuators have 4 wires (blue, brown, grey, orange), and I assume its like for like but just want to double check. Cant find the original docs that came with the danfoss stuff, but I think the link below would still be applicible:
[broken link removed]: Whats not shown on this PDF but on the paper instructions I have, is another page that is confusing me. The grey/orange are for the auxiliary switch, though it says the permanent live is grey and switched live is orange. Does that equate to the wiring diagram for the danfoss above?