Bosch LBC 3428 User manual

Horn Loudspeaker
Installation Manual
EN LBC 3428/00
LBC3428_instal.manual 05-09-2003 10:17 Page 1

1. INTRODUCTION
These speakers have been designed for
use in harsh environmental conditions.
2. INSTALLATION
General
When installing and operating electrical
equipment, requirements for selection,
installation and operation should be
referred to. Additional national and/or
local requirements may apply.
Ensure that all nuts, bolts and fixings are
secure. Ensure that appropriate stopping
plugs are used to blank off unused gland
entry points. ealing compound should
be applied to stopping plug threads to
maintain the IP rating of the unit.
The LBC 3428/00 is mounted via 2 x Ø
7mm (Ø 0.28") fixing holes in the ‘u’
shaped stirrup/mounting bracket. If
required, the unit can be initially placed
via the Ø 13mm (0.51") central hole in
the stirrup. The unit can be rotated to the
required position and fixed via the two
other holes. The fixing holes accept M6
screws or bolts. Bosch recommend the
use of stainless steel screws.
The elevation of the unit can be adjusted
by loosening the 2 x M6 screws which
fasten the stirrup to the horn.
LBC 342 /00 | Installation Manual EN |2
The unit can then be adjusted by rotating
to the required position and then
tightening the M6 screws. The LBC
3428/00 should be positioned such that
debris, dust or water cannot settle in the
re-entrant horn.
Cable Termination
CAUTION: Before removing the cover
assembly, ensure that the power to the
unit is isolated. Unscrew the 2 off screws
holding the cover to the unit.
Remove to gain access to the interior of
the enclosure. 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 appropriate cable glands are used
and that the assembly is shrouded and
correctly earthed. All cable glands should
be of an equivalent IP rating to that of
the speaker.
In order to maintain the IP rating of the
unit, the cable glands should be sealed to
the unit using a sealing washer
(if possible) and sealing compound.
Once termination is complete, carefully
push the cover back onto the unit,
avoiding damage to the seal. Tighten the
2 off cover screws evenly, to ensure
correct sealing.
Bosch Security Syste s | July 2003
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3. OPERATION
The unit is powered directly. Different
sound levels can be obtained by selecting
the transformer tappings in the unit.
4. MAINTENANCE
During the working life of the unit, little
or no maintenance is required.
LBC 342 /00 | Installation Manual EN |3
However, if abnormal or unusual
environmental conditions occur due to
plant damage or accident etc., then visual
inspection is recommended.
If a fault should occur, it is recommended
that the unit be returned to Bosch for
repair.
GENERAL ARRANGEMENT
Bosch Security Syste s | July 2003
LBC3428_instal.manual 05-09-2003 10:17 Page 3

LBC 342 /00 | Installation Manual EN |4
WIRING DIAGRAM
Numbers on Terminal Label are in pairs
to facilitate loop-in loop-out option.
Terminals are linked via PCB tracking.
www.boschsecuritysyste s.co
9498 974 31912 Printed in the UK
Updated August 2003
Data subject to change without notice.
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