If dc power supplies are installed, Temperature and ventilation – Kontron NSN2U IP Network Server User Manual
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WARNING: Do not attempt to modify or use an AC power cord set that is not the exact
type required. You must use a power cord set that meets the following criteria:
•
Rating: In the U.S. and Canada, cords must be UL (Underwriters Laboratories, Inc.)
Listed/CSA (Canadian Standards Organization) Certified type SJT, 18-3 AWG (American
Wire Gauge). Outside of the U.S. and Canada, cords must be flexible harmonized
(
Engineers) certified cord with 3x 0.75 mm conductors rated 250 VAC.
•
Connector, wall outlet end: Cords must be terminated in grounding-type male plug
designed for use in your region. The connector must have certification marks showing
certification by an agency acceptable in your region and for U.S. must be listed and
rated for 125% of the overall current rating of the server.
•
Connector, server end: The connectors that plug into the AC receptacle on the server
must be an approved IEC (International Electrotechnical Commission) 320, sheet C13,
type female connector.
•
• Cord length and flexibility: Cords must be less than 4.5 meters (14.8 feet) long.
If DC power supplies are installed:
Connection with a DC (Direct Current) source should only be performed by trained
service personnel. The server with DC input is to be installed in a Restricted Access
Location in accordance with articles 110-26 and 110-27 of the National Electric Code,
ANSI/NFPA 70. The DC source must be electrically isolated from any hazardous AC source
by double or reinforced insulation. The DC source must be capable of providing up to
300 watts of continuous power per feed pair.
Mains DC power disconnect: You are responsible for installing a properly rated DC
power disconnect for the server system. This mains disconnect must be readily
accessible, and it must be labeled as controlling power to the server. The UL listed
circuit breaker of a centralized DC power system may be used as a disconnect device
when easily accessible and should be rated no more than 10 amps.
Grounding the server: This server is intended for installation with an isolated DC
return (DC-I per NEBS GR-1089, Issue 3). To avoid the potential for an electrical
shock hazard, you must reliably connect an earth grounding conductor to the server.
The earth grounding conductor must be a minimum 14 AWG connected to the earth ground
stud(s) on the rear of the server. The safety ground conductor should be connected to
the chassis stud with a Listed closed two-hole crimp terminal having 5/8-inch pitch.
The nuts on the chassis earth ground studs should be installed with a 10 in-lbs of
torque. The safety ground conductor provides proper grounding only for the server. You
must provide additional, proper grounding for the rack and other devices installed in
it.
Overcurrent protection: Overcurrent protection UL Listed circuit breakers must be
provided as part of each host equipment rack and must be incorporated in the field
wiring between the DC source and the server. The branch circuit protection shall be
rated minimum 75 VDC, 10A maximum per feed pair. If the DC power system for the
equipment rack is installed with more than 10 amperes of protection, you must provide
supplemental protection for the server. The overall current rating of a maximum
configured server is 8 amperes.
Temperature and Ventilation
CAUTION:
Temperature -- The temperature, in which the server operates when installed
in an equipment rack, must not go below 5°C (41°F) or rise above 35°C (95°F).
Extreme fluctuations in temperature can cause a variety of problems in your
server.
CAUTION:
Ventilation -- The equipment rack must provide sufficient airflow to the
front of the server to maintain proper cooling. The rack must also include
ventilation sufficient to exhaust a maximum of 1023 BTUs (British Thermal Units)