Bittner Audio - Application Handbook
Page 7
1.7.
Packing
Upon unpacking, please inspect the product. If you find any damage, notify your supplier
immediately. Be sure to save the carton and all packing materials in case you have to send the
product to the supplier.
Please use only the original factory packing. If the shipment carton is unavailable, contact Bittner
Audio International GmbH (www.bittner-audio.com) to obtain a replacement.
1.8.
Air Ventilation & Cooling Requirements
The amplifier is equipped with a forced air-cooling system with variable speed and temperature
controlled fans to guarantee low operating temperature and minimal ventilation noise. The air
flow takes place from the rear to the front of the amplifier. The air-pulling fans are installed on the
back side of the unit. The air flow is always from the front to the rear side.
In case a heat sink becomes too hot, the temperature sensor opens the respective output relay,
disconnecting the output load from the particular channel. In case the power transformer gets
overheated, a different sensor causes the output relays on all channels to open and to interrupt
the outputs. After cooling down to an appropriate operating temperature level the relay contacts
are closed again automatically.
It is important to have adequate air ventilation space behind the amplifier to allow a proper air
flow. In case the amplifier is mounted inside a closed rack, do not cover the front of the rack with
doors. If using racks with a closed backside, use fans on the rear rack panel. Bittner Audio
recommends one open rack space for every 3 mounted power amplifiers.
1.9.
Installation in Rack
All devices will mount in standard 19-inch racks having sufficient depth and should be mounted
with four standard rack bolts. To avoid the deformation of the chassis it is recommended to mount
heavy units on horizontal brackets.
Please ensure a sufficient airflow. In the case, closed racks are being used rack-fans should be
used. For larger installations one open rack space (1RU) for every 3 mounted power amplifiers
should be provided.
1.10.
Power Connection
The power amplifier must be connected only with the attached three-wire safety power
cord with protective conductor (non-fused earthed conductor).
This amplifier is made for use with the mains voltage labeled on the back of the amplifier
only. Check the label on the back panel of the amplifier for the appropriate voltage.
Make sure the voltage of your mains outlet is correct. The power voltage is factory set as
labeled on the back panel and cannot be changed afterwards. Damage caused by
connecting the amplifier to improper AC voltage voids the warranty.
NEVER isolate the ground of the AC power cords (the non-fused earthed protective
conductor) to eliminate hum-problems.
Always turn off and disconnect the amplifier from the mains voltage before making any
audio connections. As a precaution, turn the audio attenuators on the front panel down
during powering up.
The power fuses are located on the back panel of the amplifier and can be accessed
from the outside. Use only the appropriate fuses as labeled.
After properly mounting and connecting the AC cord and the audio connections, the unit
can be switched on.
