Tait TB9400, Инструкция по установке и эксплуатации, Страница: 52 / 149

52 Installation
TB9400 Installation and Operation Manual
© Tait International Limited November 2019
4.1.5 Cabinet and Rack Ventilation
The cooling airflow for the subrack enters through the front panel and exits
at the rear. For optimum thermal performance, the heated air that passes
through a base station must never be allowed to re-enter the air intakes on
the front panel. Any space at the front of the cabinet not occupied by
equipment should be covered by a blanking panel. Refer to
Figure 4.1 on
page 53 .
Equipment installation should observe the following guidelines:
■
The recommended maximum number of subracks in a 38U cabinet is
five as shown in
Figure 4.1 on page 53 .
■
Any space at the front of the cabinet not occupied by equipment should
be covered by a blanking panel. Refer to
Figure 4.1 on page 53 .
■
Subrack placement in the cabinet should include a 2U gap at the top of
the cabinet.
■
To allow enough cooling airflow through a cabinet-mounted base
station, the cabinet should allow for 50 cu.ft/min for each subrack
(0.024 cu.m/s).
■
To ensure adequate ventilation, the cabinet should have a vent at the top
with an area of approximately 23in
2
(150cm
2
) per subrack, or a similar
area of ventilation per subrack at the rear of the cabinet behind each
subrack.
■
The maximum ambient temperature at the base station front panels must
not 140°F (+60°C).