Always make sure that the rack-mounting rails are completely level.
Because higher ground-leakage currents are associated with
connecting several pieces of equipment to the same power
WARNING: This product is very heavy. To reduce the risk of personal
source, Compaq recommends using a power distribution unit
injury or damage to the equipment:
(PDU) that provides a supplementary ground conductor.
·
Connect this supplementary ground conductor permanently to a
Observe local occupational health and safety requirements and
suitable building ground terminal. Do not use common power
guidelines for manual material handling.
outlet strips for this equipment.
· Get help to lift and stabilize the product during installation or
removal, especially when the product is not fastened to the rails.
Temperature Requirements
To ensure continued safe and reliable operation of the
WARNING: When the product is installed into or removed from the
equipment, locate the system in a well-ventilated, climate-
rack, the product is unstable when not fastened to the rails.
controlled environment.
Space Requirements
The Compaq Maximum Recommended Ambient Operating
Temperature (TMRA) for most device products is 35°C (95°F).
Front clearance. Leave at least 64 cm (25 in) in front of the rack
Therefore, the temperature in the room where the rack is located
to allow the door to open all the way and to provide
should not exceed 35°C (95°F).
adequate airflow.
Back clearance. Leave at least 77 cm (30 in) behind the rack to
The operating temperature inside the rack is always higher than
allow easy servicing and to provide adequate airflow.
the room temperature and is dependent on the configuration of
equipment in the rack. The maximum internal rack temperature
Power Requirements
for your configuration should not exceed the values in the Rack
Internal Temperature Maximums table (below).
WARNING: To reduce the risk of personal injury, fire, or damage to the
equipment, do not overload the AC supply branch circuit that provides
Rack Internal Temperature Maximums
power to the rack. Consult the appropriate electrical authority for the
wiring and installation requirements of your facility.
Equipment Included
Maximum Internal Rack Temperature
Compaq StorageWorks TM
50°C/122°F
Balance circuit power load. The circuit power load must be
NAS B3000 Device
balanced between available AC supply branch circuits.
Compaq rack-mountable
40°C/104°F
Limit circuit current load. The overall system AC current load must
options
not exceed 80 percent of the branch circuit AC current rating.
Other manufacturers’
See manufacturing specifications
Limit power strip load. If power strips are used, the load should
options
not exceed 80 percent of the marked electrical current rating.
CAUTION: To reduce the risk of damage to the equipment when
Installation of this equipment shall be in accordance with local/
installing third-party options:
regional electrical regulations governing the installation of
information technology equipment by licensed electricians. This
· Make sure that the option equipment does not impede airflow
equipment is designed to operate in installations covered by the
to a rack-mountable StorageWorks NAS B3000 device or
National Electric Code (ANSI/NFPA 70, 1993) and the code for
increase the internal rack temperature beyond the maximum
Protection of Electronic Computer/Data Processing Equipment
rating specified by Compaq.
(NFPA-75, 1992).
· Make sure that the manufacturer's maximum recommended
For electrical power ratings on options, refer to the rating label on
ambient operating temperature of the option equipment is not
the product or to the user documentation supplied with that
exceeded after the equipment is installed into the rack.
option.
Airflow Requirements
Grounding Requirements
The device draws cool air in through the front door and exhausts
For proper operation and safety, this equipment must be properly
warm air out the rear door. Do not block ventilation apertures.
grounded (earthed). In the United States, install the equipment in
accordance with NFPA 70-1993 (National Electric Code) Article
CAUTION: If a third-party rack is used, the following minimum
250, as well as any local and regional building codes. In Canada,
requirements must be observed to ensure adequate airflow and to
the equipment should be installed in accordance with Canadian
prevent damage to the equipment:
Standards Association, CSA C22.1, Canadian Electrical Code. In
all other countries, the installation should follow any regional or
· Front: The front must have a minimum of 63.5 cm (25 in) of
national electrical wiring codes, such as the International
unrestricted ventilation.
Electrotechnical Commission (IEC) 364, parts 1 through 7. All
·
power distribution devices used in the installation, including
Side: The clearance between the installed module and the side
panels of the rack must be a minimum of 6.9 cm (2.75 in).
branch wiring, receptacles, and so forth, should be listed or
certified ground-type devices.
· Rear: The clearance between the back of the rack and the wall
must be a minimum of 76.2 cm (30 in), and the equipment
WARNING: To reduce the risk of personal injury, fire, or damage to
must be operated without a rear door.
the equipment, do not overload the AC supply branch circuit that
provides power to the rack. Consult the electrical authority for the
wiring and installation requirements of your facility.

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