Temperature Requirement; Power Requirements - NEC Express5800/R120h-2M User Manual

Chapter 2 Preparations

Temperature requirement

The system must be installed or located in well-ventilated and well-controlled places so that the equipment
operates safely and properly.
For most server products, the maximum recommended ambient operating temperature (TMRA) is 35°C. The
temperature inside the room where the rack is installed should not exceed 35°C.

Power requirements

The installation of this equipment must be performed by a qualified electrician according to the electrical
standards of your region
designed to operate in the system configuration specified by NFPA 70; 1999 Edition (National Electric Code) and
NFPA-75; 1992 (Code for Protection of Electronic Computer/Data Processing Equipment). For the rating of the
optional power supply, refer to the rating label of the product or the user document included with the option.
If more than one server are installed, additional distribution equipment may require to be used for securely
powering all the devices. Follow the guidelines below.
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Note When using racks of other companies, the following additional requirements must
be met in order to improve the ventilation for preventing damages to the
equipment.
 Front and rear doors - When closing the front or rear doors with a 42U rack, the
ventilation holes of 5350 cm 2 (830 sq in.) should be distributed evenly from
top to bottom for the proper ventilation (These are equivalent to 64% of the
opening required for ventilation).
 Side - Make at least 7 cm (2.75 in.) clearance between the installed rack
components and the side panels of the rack. Blank panels should be used to
cover on all the shelves that do not have components installed. This ensures
the adequate ventilation. If a rack without a blank panel is used, high-
temperature damage may occur due to improper cooling.
Note When installing options of other companies, note the following points for
preventing damages to the equipment.
 Never block the ventilation around the server with optional equipment, and
make sure that temperature inside the rack does not exceed the maximum
specifications.
 Make sure that the manufacturer`s TMRA specification is not exceeded. When
using racks of other companies, the following additional requirements must be
met in order to improve the ventilation for preventing damages to the
equipment.
regarding to the installation of information technology equipment. This device is
Important To prevent injuries, fires, or damages to the equipment, the rated load of the
AC power supply branch circuit that supplies power to the rack should not be
exceeded. For wiring and installation requirements of electrical equipment,
contact the power company in your area.
Note Use a UPS (Uninterruptible power supply) to protect the server from unstable
power situation or temporary power outages. The UPS protects the hardware
against damages caused by power surges and voltage spikes, and allows the
system to continue operation even during a power outage.
Express5800/R120h-2M User's Guide
2. Installation and Connection