Cooling; Rack Installation; Ventilation - Zenith 10K4 User Manual

5.3 Cooling

The amplifier uses a forced-air cooling system with
airflow from front to rear, maintaining a low
operating temperature within defined limits. Front-to-
rear airflow is preferred as cooler air is present at
the front in nearly all applications. (This allows
higher continuous power levels without encountering
thermal problems.) Never attempt to reverse the
airflow. The amplifier modules require a pressure
chamber between the fans and heat sink, and this
effect functions only in one direction.
Make sure that there is an adequate air supply in
front of the amplifier, and that the rear of the
amplifier has sufficient space to allow the exhaust to
escape. If the amplifier is rack-mounted, do not use
covers or doors on the front or rear of the rack.
Should a heat sink overheat, the temperature
sensing circuits will mute the overheating channel. If
the power supply overheats, another sensing circuit
will mute all output channels until the power supply
cools to safe operating temperature. An early
warning before shut down will be indicated on the
front panel LEDs.
Always make sure that the dust-filters behind the
detachable front panel are clean to ensure
maximum possible airflow.
- If the amplifier malfunctions due to dirty dust
filters, any required repairs are not covered by the
warranty.
- The horizontal stacked, suggest the tail exhaust
outlets up or to the vents.

5.3.1 Rack installation

To prevent thermal overload, the following guidelines
should be followed.

5.3.2 Ventilation

The 10K4 amplifier draws cool air in via the front
panel and exhausts via the rear. Care should be
taken to install away from devices with the opposite
airflow direction.
- For installed rack systems or touring racks with
enclosed rear panels, additional forced exhaust
ventilation should be utilised.
Zenith 10K4 Amplifier Manual 9