F1 PSU rails in series ?

[jimk04]

I have this F1 Psu, 2 single rails of 24v. Been using it to power 2 X ACA.
I wish to try my 3255 class d amp and it wants for single rail 48v or so.
Can I put the two 24v rails in series? The two grounds for the rails aren't connected. Separate windings and rectifiers.
It has 35v caps. Is that still ok or would I be putting the sum of the rail voltages thru them? If so it's a no go!