Tait TB7300, Installation And Operation Manual

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50 Installation TB7300 Installation and Operation Manual
© Tait Limited November 2016
5.1.5 Cabinet and Rack Ventilation
Refer to Figure 5.1 on page 51 .
Adequate cooling airflow is critical to the performance of the base station.
The cooling airflow for the base station enters through the front panel and
exits at the rear of the tray. For optimum thermal performance, the heated
air that has passed through a base station must not be allowed to re-enter
the air intakes on the front panel.
Each base station requires an unobstructed airflow of 18m
3
/h (11cfm).
To allow enough cooling airflow through a cabinet mounted base station
we recommend the following:
■
A distance of 5cm minimum clearance to any obstruction to the front of
the tray.
■
An open area of at least 50cm
2
(8sq.in.) per tray of ventilation slots or
louvres in front of the air intakes for the fans for each tray; for example
ten 6×85mm (0.25×3.3in.) slots will allow the recommended airflow.
■
A distance of 10cm minimum clearance to any obstruction to the rear of
the tray.
■
An open area of at least 50cm
2
(8sq.in.) per tray of ventilation slots or
louvres in the top of the cabinet, or to the rear of each tray.
■
A distance of 7.5cm minimum clearance to any obstruction to either
side of the tray.
■
A 2U gap at the top of the cabinet.
The ventilation opening must be unrestricted. If the slots or holes are
covered with a filter, mesh or grille, the open area must be increased to
allow the same airflow as an unrestricted opening.
The maximum ambient temperature entering the cabinet must not exceed
the maximum temperature specified for the base station.
If the base station is installed in a rack or cabinet with other equipment with
different ventilation requirements, we recommend that the base station be
positioned below this equipment.
Auxiliary Extractor
Fans
If multiple base stations are fitted in a cabinet, auxiliary extractor fans may
be required to ensure adequate cooling. If fitted they should be capable of
extracting 18m
3
/h (11cfm) per base station in the cabinet.
If you have any other configuration, the performance of your system will
depend on how closely you comply with the base station airflow
requirements described above.