Installation; Operation; Maintenance - MEDC DB4 Technische Anleitung

English

1. INSTALLATION

The unit mounts via a 'u' shaped strap and can be orientated in both azimuth and elevation. The fixing centres of
the strap are quoted on the catalogue sheet. When fixed in position the units' alignment can be adjusted by
loosening the two M6 screws, which fasten the strap to the speaker. The speaker can then be adjusted to the
required position and the screws tightened.
1.1 To Remove End Cover
Remove the 6 off M5 cover screws (EExd version) or 2 off M5 cover screws (EExde version).
Cable termination should be in ac cordance with specifications ap plying to the application. MEDC recommend
that all cables and cores should be fully identified.
Ensure that only the correct certi fied glands are used and that the assembly is shrouded and correctly earthed.
1.2 General
When installing and operating explosion-proof electrical equip ment, the relevant national regula tions for
installation and operation (e.g. IEE Wiring Regulations) must be observed.
Ensure that all nuts, bolts and fix ings are secure.
Ensure that only the correct certified stopping plugs are used to blank off unused gland entry points. We
recommend the use of 'HYLOMAR PL32 COMPOUND' on the threads of the stopping plugs in order to maintain
the IP rating of the unit.

2. OPERATION

The speaker is available in 4 standard wattage ratings (see catalogue sheet) and in EExd or EExde versions.
Different sound levels can be ob tained by selecting the transformer tappings in the unit. These tappings are
listed in the catalogue sheet.

3. MAINTENANCE

During the working life of the unit, it should require little or no mainte nance. GRP will resist attack by most acids,
alkalis and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
However, if abnormal or unusual environmental conditions occur due to plant damage or accident etc., then
visual inspection is rec ommended.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
If spare parts are required, then these should only be supplied by MEDC.
If a unit fault should occur, then the unit should be returned to MEDC for repair/replacement.
4. CERTIFICATION
Certification to:
EN50014:1997, EN50018:1994 & EN50019:1994
EExd IIC & EExde IIC
For T classes and ambient temper ature ranges please see 'Special Conditions of Safe Use' .
ATEX Certificate Nos:
BAS00ATEX2097X (EExd) &
BAS 00ATEX2098X (EExde).
The ATEX certificate and the prod uct label carry the ATEX group and category marking:
II 2 G
Where:
signifies compliance with ATEX
II signifies suitability for use in surface industries
2 signifies suitability for use in Zone 1
11/07 © MEDC 2004