Ive got it to work!
We got a new glowplug cause the old one didnt glow. The new one doesnt either though, something is wrong there. With both the old and new (expensive) plug not working and probably dead by overvoltage....
But wait, the thing is soviet! So, in a stroke of genius, my train of though went:
The glowplug doesnt work.
The plug should be hot so the diesel ignites.
What else is hot...
Fire!
I got a small blowtoch, used it to heat the unit, and some left over diesel started to burn. Then switched on the fuel supply, and the fans, and off she went
Was very smokey at first... when most of it cleared I took this pic
It's got the entire workshop nice and warm. Should do the trick for the cabin easily.