Oce 9800 User Manual page 199

Do not place the machine in rooms which are too small and insufficiently
ventilated. See the Océ 9800 safety data sheet in this appendix for
information about space and ventilation requirements.
General
Always use materials recommended by Océ and developed for this Océ
machine. Materials not approved by Océ may result in faults in your
machine.
Do not use the machine when it is emitting unusual sounds. Remove the plug
from the power socket or switch off the fixed connection to the electricity
grid and contact Customer Service.
Safety information 199