Artesyn Centellis 4100 Installation and Use (2015) - Manual (Page 76)

Site Preparation
Centellis 4100 Installation and Use (6806800D82E) 78
Failure of maximal one blower is allowed.
If you install the system into a closed frame, ensure that the air inlet and outlet are kept free.
2.2.7 Acoustic Noise Control
The system can generate a lot of acoustic noise. This system has a built-in noise control due to
the blower speed control. If the system is installed in an environment where the noise may be
harmful to personnel being exposed to the noise during extended time periods, addititional
protective measures should be considered.
The distance to other equipment must be sufficient to avoid an overheating of the system.