Nokia 7360 Intelligent Services Access Manager FX Series Hardware Installation Manual page 33

ANSI Hardware Installation Manual
Issue: 09
The following rack installation guidelines should be
Danger —
considered before installing a rack mounted shelf.
•
Elevated operating ambient temperature
If the shelf is installed in a closed or multi-unit rack assembly, the
operating ambient temperature of the rack environment may be
greater than room ambient. Consideration should be given to
installing the shelf in an environment compatible with the maximum
ambient temperature (Tma) specified for the shelf.
It is possible for a horizontally-mounted shelf to blow hot air into the
air inlet of another horizontally mounted shelf in an adjacent rack.
Proper deflectors should be used at the rack level to prevent heat
accumulation.
•
Reduced air flow
Installation of the shelf in a rack should be such that the amount of
airflow required for safe operation of the shelf is not compromised.
Consideration should be given to potential interference from fans
that are external to the rack-mounted equipment, such as air
conditioning units that might create airflow which is in opposition to
the airflow created by fan of the rack-mounted shelf.
•
Mechanical loading
Mounting of the shelf in the rack should be accomplished to avoid a
hazardous condition due to uneven mechanical loading.
•
Circuit overloading
Consider the connection of the shelf to the supply circuit and the
effect that overloading of the circuits might have on overcurrent
protection and supply wiring. Appropriate consideration of shelf
nameplate ratings should be used when addressing this concern.
•
Reliable earthing
Reliable earthing of rack mounted shelves should be maintained.
Particular attention should be given to supply connections other than
direct connections to the branch circuit (for example, use of power
strips).
•
Environmental requirements
7360 ISAM FX shelves use forced air convection cooling and have
service-accessible, replaceable fan filters. These shelves are
designed to self-protect and therefore shut down when over-heating.
Reliable equipment operation is specified as operation within a
protected environment, otherwise known as a Controlled
Environment. For more information, please see
Section 2.2 Installation environment
The fan filters in FX shelves must be replaced regularly to avoid
service interruptions caused by blocked, dust-laden filters.
Ensure that the technical details on environmental conditions
specified in GR-63-CORE [32] and GR-3108-CORE [40] are met.
3HH-12893-AAAA-TCZZA
DRAFT
requirements.
Overview
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