User guide

8. Cooling and fan operation

D SERIES Lake Quick Start Guide rev 1.2.0

8. Cooling and fan operation

D Series devices use a forced-air cooling system with airow from front to rear, allowing high continuous power

levels without thermal problems. To facilitate maximum air ow, ensure that no objects such as rack doors or

lids are placed at the front or rear of the rack. Never attempt to reverse the airow. Make sure an adequate air

supply is provided in front of the D Series device, and that the rear of the device has sufcient space to allow

air to escape. It is recommended to keep the ambient temperature around the device as cool as possible. An

increased temperature can have a signicant negative impact on the expected lifetime on the components

inside the D Series device.

NOTE: Fit solid blanks (not ventilation blanks) to unused rack spaces to ensure effective air circulation. Leaving

gaps in between items of equipment degrades the effectiveness of forced-air cooling.

If installing one or more D Series devices in a rack with other fan-cooled equipment, conrm that all other

equipment also uses front-to-rear airow for cooling. If this precaution is not observed, there is a risk of

overheating, as units with the reverse airow will be drawing in air which has already been heated by the

D Series devices.

The D Series device is equipped with a sophisticated temperature sensing system which protects it from any

overheating which may occur as a result of inadequate ventilation.

9. Operating voltage

D Series has a universal power supply and its mains nominal and operating voltages are specied in the Technical

Specications (pages 26-27). D Series can be ordered with a variety of mains plugs. If the mains plug (AC plug)

tted to the mains cable (AC cord) is not appropriate for your country it can be removed and a locally-sourced one

tted instead. If you are not 100% condent of your competence to replace the mains plug (AC plug), the task

should be carried out by qualied personnel.

NOTE: In-rush current is controlled and limited during the soft-start sequence. This enables multiple D Series

Devices on the same AC mains circuit to be turned on simultaneously.

9.1. Low voltage country considerations

Although the D Series has a wide range of operating mains voltage, some considerations can be applicable for

low voltage regions. D Series performs well throughout the specied nominal voltage range but has slightly better

efciency at higher voltages. For regions with nominal voltage below 140 V, one could consider connecting the

amplier in a three-phase delta or two phase split-phase conguration.

NOTE: Following connections applicable only for resulting voltage inside the ampliers nominal voltage range.