Dell PowerVault ME4 Series Storage System Deployment Guide

Rack system safety precautions

The following safety requirements must be considered when the enclosure is mounted in a rack:

• The rack construction must support the total weight of the installed enclosures. The design should incorporate stabilizing features to prevent the rack from tipping or being pushed over during installation or in normal use.
• When loading a rack with enclosures, fill the rack from the bottom up; and empty the rack from the top down.
• Before installing the enclosure into the rack, remove all power supply modules to minimize weight.
• Do not try to lift the enclosure by yourself.

• The system must be operated with low-pressure rear exhaust installation. The back pressure that is created by rack doors and obstacles must not exceed 5 pascals (0.5 mm water gauge).
• The rack design should take into consideration the maximum operating ambient temperature for the enclosure. The maximum operating temperature is 35ºC (95ºF) for controllers and 40ºC (104ºF) for expansion enclosures.
• The rack should have a safe electrical distribution system. It must provide overcurrent protection for the enclosure. Make sure that the rack is not overloaded by the total number of enclosures that are installed in the rack. Consideration should be given to the electrical power consumption rating shown on the nameplate.
• The electrical distribution system must provide a reliable connection for each enclosure in the rack.
• Each PSU or PCM in each enclosure has a grounding leakage current of 1.0 mA. The design of the electrical distribution system must take into consideration the total grounding leakage current from all the PSUs/PCMs in all the enclosures. The rack requires labeling with “High Leakage Current. Grounding connection essential before connecting supply.”