Tanning bed

A customer of mine bought a used Lohmann tanning bed.
The problem is that he doesn't have a manual for this bed, and the previous owner had her father do the original wiring, so
I don't know if the unit requires a GFI protection. The cord end were cut off and installed in a juntion box.
This unit is now sitting in
the basement on the concrete floor.
To play it safe, I'm going to put a GFI breaker on this unit, will the ballast create problems for the GFI??

Name plate rating is 1580 watts for each half of the bed and a voltage rating of 240.

Any thoughts on this?

Thanks,