AFRISO ACU 2030 Benutzerhandbuch - Seite 5

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User Guide

ACU 2030

Application

The ACU2030 heavy duty level alarm system is designed to operate in conjunction with any level

switch possessing a voltage-free relay output contact.

The unit provides audible and visual alarms of level alarm conditions in tanks, sumps or bund

enclosures. The unit is specifically designed for outdoor mounting and is protected to IP65.

Operation

The system consists of the ACU 2030 alarm control unit and any of the Afriso Eurogauge range of

level switches possessing voltage free relay output contacts. The ACU 2030 incorporates both

visual and audible alarms, a set of voltage-free output relay contacts, as well as an alarm Test switch

and an audible alarm Mute switch. When the relay contacts on the level switch change state, due

to the presence of an alarm condition, a DC circuit is completed and the alarm circuit in the

ACU2030 is activated. When an alarm condition is present the red alarm LED will come on, the

sounder will operate and the output relay will energise. Operating the Mute switch will silence the

sounder. Operating the test switch will simulate an alarm condition causing the red alarm LED to

come on, the sounder to operate and the output relay to energise.

Installation

3.1

General

The ACU 2030 unit is designed for outdoor mounting on any suitable flat vertical surface. Unscrew

the four captive screws in the lid of the unit and carefully remove the lid. The base of the unit is then

fixed to the mounting surface by means of four screws through the fixing holes in the base of the

unit. Fixing hole spacing centres are 160 x 110 mm and take M4 screws.

3.2

Wiring

Wiring to the ACU2030 alarm control unit must be in suitable cable for the application conditions,

and the installation must comply with all statutory requirements that may affect the complete

installation. The unit must be supplied via an unswitched fuse unit to prevent unauthorised isolation

of the system. Standard electrical installation cable, suitable for the intended supply voltage must

be used and consideration must also be given to any special environmental conditions.

The instrument must be wired in accordance with the wiring diagram.

Testing of System Function

Once the unit has been wired up the system function should be tested by operating the test switch.

This will cause the red alarm LED to come on, the sounder to operate and the output relay to energise.

The sounder can be muted by operating the mute switch.

Issue 6: 20/11/2018

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