Bosch LBC 3438-00, LBC 3437-00 User Manual

Horn Loudspeaker

Installation Manual

EN LBC 3437/00

LBC 3438/00

LBC3437/LBC3438_instal.manual 05-09-2003 10:18 Page 1

1.0 Installation

1.1 General

When installing and operating explosion­protected electrical equipment,
requirements for selection, installation
and operation (e.g. IEC 60079-14) must
be observed.

Cable termination should be in
accordance with specifications applying
to the application.
Bosch recommend that all cables and
cores should be fully identified.
Ensure that only the correct certified
glands are used and that the assembly is
shrouded and correctly earthed. A
sealing washer must be fitted to maintain
the IP rating. Ensure that all nuts, bolts
and fixings are secure.

1.2 Mounting the Unit

The unit mounts via a ‘u’ shaped strap.
This strap is supplied loose and is
attached to the speaker with the 2 off M6
x 20mm screws and washers provided.
The fixing centres of the strap are
indicated on the attached drawing
(see Figure 2). When fixed in position,
the unit’s alignment can be adjusted by
loosening the two M6 screws. The
speaker can then be adjusted to the
required position and the screws
tightened. The speaker should be
positioned such that dust, debris or water
cannot settle in the re-entrant horn.

LBC 3437/00, LBC 3438/00 | Installation Manual

EN

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1.3 To Remove End Cover

Remove the 6 off M5 Cover screws.

1.4 To Fit Gland

To fit the gland supplied refer to the
fitting instructions (see figure 1).

2.0 Operation & Wiring

The speaker is available in 2 standard
wattage ratings (15W and 25W).
Different sound levels can be obtained
by selecting the transformer tappings in
the unit (see figure 3).

3.0 Maintenance

During the working life of the unit, it
should require little or no maintenance.
However, if abnormal or unusual
environmental conditions occur due to
plant damage or accident etc, then visual
inspection is recommended.

If a unit fault should occur, then the unit
should be returned to Bosch for
repair/replacement.

4.0 Certification

Certification to:- EN50014:1997,

EN50018:1994
15W: EExd IICT5
25W: EExd IICT4

ATEX Certification No:

BAS00ATEX2097X

Bosch Security Systems | July 2003

LBC3437/LBC3438_instal.manual 05-09-2003 10:18 Page 2