I think they gave you the short answer that under normal circumstances there should not be an air quality problem. The long answer would be that since something in the copy room environment is negatively affecting you, then the air quality should be looked at. The fact that you have a smaller space and can sometimes run the two machines for extended periods would indicate that they could very well create a air quality problem.Ricoh said we don't need any special ventilation. No dangerous fumes will be emitted from the machines they said and the room looks fine.
I wouldn’t go too long without getting an answer especially on the ozone because repeated exposure to elevated ozone levels over longer periods can cause long term tissue damage to your lungs.
The simple solution may be that you need to increase the number of air changes per hour that your copy room has. Increased exhaust and increased fresh air.
I did come across another piece from Xerox about air quality and it gives some details on air changes per hour. Maybe you could use it as an incentive to convince someone that the air quality could be a health problem. Good luck!