User`s guide

2-2 NovaScale R422 Installation and User's Guide
Warnings and Precautions!
Rack Precautions
Ensure that the leveling jacks on the bottom of the rack are fully extended to the fl oor
with the full weight of the rack resting on them.
In single rack installation, stabilizers should be attached to the rack.
In multiple rack installations, the racks should be coupled together.
Always make sure the rack is stable before extending a component from the rack.
You should extend only one component at a time - extending two or more
simultaneously may cause the rack to become unstable.
Server Precautions
Review the electrical and general safety precautions in Chapter 4.
Determine the placement of each component in the rack before you install the rail.
Install the heaviest server components on the bottom of the rack fi rst, and then work
up.
Use a regulating uninterruptible power supply (UPS) to protect the server from power
surges, voltage spikes and to keep your system operating in case of a power failure.
Allow the hot plug SATA drives and power supply modules to cool before touching
them.
Always keep the rack's front door and all panels and components on the servers
closed when not servicing to maintain proper cooling.
Rack Mounting Considerations
Ambient Operating Temperature
If installed in a closed or multi-unit rack assembly, the ambient operating temperature of
the rack environment may be greater than the ambient temperature of the room. Therefore,
consideration should be given to installing the equipment in an environment compatible
with the manufacturer’s maximum rated ambient temperature (Tmra), see Appendix D.
Reduced Airfl ow
Equipment should be mounted into a rack so that the amount of airfl ow required for safe
operation is not compromised.
Mechanical Loading
Equipment should be mounted into a rack so that a hazardous condition does not arise due
to uneven mechanical loading.
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