Dynacord Power Amplifier DPA 4245 Manuale d'uso - Pagina 4
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Installation Notes
Generally, it is important to install the power amplifier in a way, that ensures unhindered front-to-rear air
circulation.
When installing the power amplifier in a closed rack-shelf system, please make sure that adequate air-flow
is guaranteed. The space between the rear panel of the amplifier and the inner wall of the rack-case has
to be at least 60 mm x 330 mm. A free space of at least 100 mm above the rack-shelf system is needed
to provide sufficient air circulation. Since, during operation, the temperature inside the rack system could
easily rise up to 40° C, the maximum allowable ambient temperatures of the rest of the incorporated
modules and appliances within a specific rack-shelf system have to be taken into careful consideration.
When mounting the power amplifier insi-
de of a closed rack system, it is recom-
mended to use special rack-rails or
optionally available rack-mount ears
NRS 90235 (112733) to prevent bending
of the appliance's front panel.
Note
For maintained trouble-free operation of the appliance, the maximum admissible ambient
temperature of +40°C is not to be exceeded.
The amplifier has to be protected from:
- water drops or splashes
- direct sunlight
- high ambient temperatures and the direct radiation of heat sources
- high humidity and moisture
- heavy dust
- massive vibrations
Moving the amplifier from a cold into a warm environment can result in the occurrence of condensation
on inner parts. Operating the appliance is only permissible after it has accommodated to the altered
temperature (approximately after one hour).
Should any foreign solid parts or liquids inadvertently intrude the enclosure, immediately unplug the device
from the power source and have it checked at a DYNACORD service center, before further use.
Cleaning the appliance should not be performed using chemical solvents or sprays, as this might damage
the finish and could even cause hazard fire.
Before The First Operation
Before switching the amplifier's power on, the included mains cord has to be connected to a 230 V - 50/60
Hz wall outlet. On the appliance itself, the cord has to be connected to the 3-pole mains socket.
To remotely start the amplifier, it is necessary to connect an external 24 V power source to the terminal
strip POWER REMOTE. Providing correct connection and with an external power supply being present,
the POWER ON indicator will light and the power amplifier is ready for operation.
The mains switch POWER on the rear of the appliance is meant for service and maintenance purposes
only. Through bridging the mains switching relay this option provides the possibility to operate the amplifier
without an external 24 V power supply connected.
Caution The mains switch POWER on the rear of the appliance is only meant for maintenance.
Remotely switching off the device is not possible when the POWER switch is engaged.
The DPA-Series power amplifiers employ power-on switching delays of approximately 2 seconds.
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