Installation; Mounting; Cooling And Fan Operation - Lab.gruppen E 4:2 Operation Manual

7. Installation

7. Installation

7.1. Mounting

The amplifier is one rack unit high (1U) and will fit into a standard EIA 19" rack. The depth is 276 mm (10.9"). The
weight is approximately 4.2 kg (9.3 lbs) depending on model type.
Free airflow from front-to-rear of the amplifier must be allowed. Therefore, no doors or rack-lids should be mounted
in front of or behind the amplifiers.
Amplifiers may be stacked directly on top of each other. There is no need for spacing in between units, although
spacing might enable more convenient installation of cabling on the rear panel.

8. Cooling and fan operation

The E Series amplifiers have very low idle power draw and they are very efficient. However, to reduce the risk
of engaging thermal protection, the amplifier has been designed with a forced-air cooling system (air flow from
front-to-rear) that activates as needed. Front-to-rear airflow is preferred as cooler air is present at the front in nearly
all installed applications, allowing higher continuous power levels without encountering thermal problems.) Never
attempt to reverse the airflow.
Always allow adequate air supply in front of the amplifier, and ensure that the rear of the amplifier has sufficient
space to allow 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 TEMP LED.
Always make sure that the recessed dust grille in the front is clean to ensure maximum possible airflow as this will
minimize the risk of thermal protection, any required repairs are not covered by the warranty.
To calculate the maximum heat emission value when installing the amplifiers in rooms with an air-conditioning
system, please refer to the Thermal Dissipation specifications provided in the Appendix (Section 14.2).
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E SERIES Operation Manual rev 2.0.0