2U Enclosures Only; Rack System Safety Precautions - Lenovo Storage D1212 Hardware Installation And Maintenance Manual

Do not remove covers from the PCM, PSU, or cooling modules– there is a danger of electric shock inside.
Return the PCM, PSU, or cooling modules to your supplier for repair.
Important: The RJ45 socket on the ESM is for Ethernet connection only and must not be connected to a
telecommunications network.

2U Enclosures Only

2U enclosures are intended to operate with two PCMs.
Figure 7. Power Cooling Module Warning Label
When bifurcated power cords ("Y" leads) are used, these cords must only be connected to a supply range of
200-240 VAC.
5U Enclosures Only
5U enclosures are intended to operate with two PSUs and five cooling modules.
When powered by multiple AC sources, disconnect all supply power for complete isolation.
Do not remove covers from the enclosure or any of the modules – there is a danger of electric shock inside.
Do not attempt to disassemble the rear sub-chassis from the enclosure. Return any damaged components to
your supplier for repair.
CAUTION:
The PSUs contain double pole/neutral fusing. Ensure that your electrical installation can support this.

Rack System Safety Precautions

The following safety requirements must be considered when the enclosure is mounted in a rack:
• The rack construction must be capable of supporting the total weight of the installed enclosures. The
design should incorporate stabilizing features suitable 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 from the top down.
• Do not try to lift the enclosure by yourself.
To avoid danger of the rack falling over, under no circumstances should more than one enclosure be
moved out of the cabinet at any one time.
• The system must be operated with low-pressure rear exhaust installation. (Back pressure created by rack
doors and obstacles not to exceed 5 pascals [0.5 mm water gauge]).
• The rack design should consider the maximum operating ambient temperature for the enclosure, which is
40°C for 2U enclosures and 5U enclosures.
• The rack should have a safe electrical distribution system. It must provide overcurrent protection for the
enclosure and must not be overloaded by the total number of enclosures installed in the rack. When
addressing these concerns consideration should be given to the electrical power consumption rating
shown on the nameplate.
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Lenovo Storage D1212/D1224/D3284Hardware Installation and Maintenance Guide