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User manual
7.- NORMS FOR RACK MOUNTING (max. 35 COFDM-QAM - 7 subracks with 5 units in height - 8,7")
7.1.- Installation
of
the
ventilation facilities.
In order to facilitate the renewal and
circulation of the air inside the rack, thus
reducing the temperature of the COFDM-
QAM units and in consequence improving
its characteristics, it is advisable to place 2
ventilation units of 25W, particularly when
the rack with the COFDM-QAM is located in
warm place, with a temperature higher than
40°C.
Front
Subracks
fig. 1
These ventilators will be placed on a tray,
that is screwed onto the top part of the
Rack, fig. 1 and 2, and in this way the venti-
rack
with
lators will be able to extract the air from the
COFDM-QAM and will be able to expel it via
the gap (approx. 3-5 cm) at the top part of
the
Rack.
fig. 2
To mount the units in the rack with
ventilation, you must mount a blank plate
ref. 5073 between the modules to allow the
correct ventilation of the equipment, fig. 4.
fig. 3
38
COFDM-QAM
5073
fig. 4
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