THOMSON DD10, Installation Manual

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3. Mounting the Electronics Box Diamond digital
33
3.4 VENTILATION
The ambient temperature during operation must not fall below + 5
°
C or
40
°
C. Optimum operation is ensured at an ambient temperature of 30
°
C
±
5
°
C
(see the Technical Data).
For ventilation of the electronics box, blowers are provided in the upper part.
RMD 5 and RMD 10 1 blower
RMD 20 and RMD 30 3 blowers
These blowers serve to support air circulation in the unit and to lead the heated air
into the room.
For RMD 20 and RMD 30, air supply is made from the bottom, for RMD 5 and RMD
10 from the left side. The heated air is blown by the blowers into the rear part of the
cabinet.
In order to ensure continuous air circulation, make sure that the air slots in the bot-
tom of the electronics box are not covered when mounting the electronics box. This
is ensured when leaving space enough underneath the electronics box.
For this reason, it is recommended to provide for air circulation a space of 2 rack
units (2RU) in the equipment cabinet underneath the electronics box.
Minimum space underneath the frame has to be 1RU (for ventilation and slid-
ing rails)!
BTS
Fresh air
Outgoing air
Air circulation electronics box RMD 5 and RMD 10