__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. IS 2423-P Issue G 12-02-10 Sheet 2 of 4
(2)
6)
Loudspeaker Location and Mounting
The location of the loudspeakers should be made with due
regard to the area over which the unit must be audible. The
loudspeakers should only be fixed to services that can carry
the weight of the unit.
The loudspeakers should be securely bolted to a suitable
surface using the 7mm diameter boltholes in the stainless steel
U shaped mounting bracket (see figure 1). The angle can then
be adjusted in the direction that the sound is primarily required
to cover. This can be achieved by loosening the two large
bracket screws in the side of the unit, which allow adjustment
in steps of 18
°
. On completion of the installation the two large
bracket adjustment screws on the side of the unit must be fully
tightened to ensure that the unit cannot move in service.
7)
Safety Warning (Electrostatic Hazard)
The acoustic horn section is made of ABS Plastic, therefore to
avoid a possible ELECTROSTACTIC CHARGE the unit must
only be cleaned with a damp cloth.
8)
Access to the Flameproof Enclosure
In order to connect the audio supply cables to the loudspeaker
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve this remove the four M6
hexagon socket head screws (see figure 2) and withdraw the
flameproof cover taking extreme care not to damage the
flameproof joints in the process.
Note the four
M6 screws are Class A4-80 stainless steel
and only screws of this category can be used on these
loudspeakers.
It is therefore important that these screws and
their spring washers are kept in a safe place during installation.
On completion of the cable wiring installation the flameproof
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation. Also
check that the earth bonding wire between the two casting
sections is secure and the ‘O’ ring seal is in place. W hen
replacing the flameproof cover casting ensure that it is square
with the flameproof chamber casting before inserting. Carefully
push the cover in place allowing time for the air to be expelled.
Only after the cover is fully in place, should the four M6
Stainless Steel A4-80 cover bolts and their spring washers be
inserted and tightened down. If the cover jams while it is being
inserted, carefully remove it and try again. Never use the cover
bolts to force the cover into position.
9)
Power Amplifier Selection
It is important that the loudspeakers are connected to power
amplifiers that have outputs that are compatible to the type of
loudspeaker being used. Loudspeakers with a 70V or 100V
line matching transformer fitted must be connected to a power
amplifier with a 70V or 100V line output. Low impedance 8
ohm or 16 ohm loudspeakers must be connected to amplifiers
with a suitable low impedance output. When selecting the
cable size consideration must be given to the current that each
unit draws, the number of loudspeakers on the line and the
length of the cable run.
The following table shows the range of loudspeakers:-
Unit Type
Input
Wattage
Max.
I/P Volts
BExL25D
100V Line
25W
100V
BExL25D
70V line
25W
70V
BExL25D
8 ohm
25W
14.14V
BExL25D
16 ohm
25W
20V
BExL15D
100V Line
15W
100V
BExL15D
70V Line
15W
70V
BExL15D
8 ohm
15W
10.95V
BExL15D
16 ohm
15W
15.49V
The above table also shows the maximum AC signal voltages
at which the loudspeakers can be operated.
The current levels taken by the each loudspeaker will depend
on which output tapping has been selected (see section 13 of
this instruction manual). BExL25D 70V and 100V Line units
have output levels of 25W, 12.5W, 6W and 2W; BExL15D 70V
and 100V Line units have output levels of 15W , 7.5W, 3W and
1W.
10)
Cable Selection
When selecting the cable size consideration must be given to
the current that each unit draws, the number of loudspeakers
on the line and the length of the cable runs.
SAFETY WARNING: If the loudspeakers are used at high
ambient temperatures, i.e. over +40ºC, then the cable entry
temperature may exceed +70ºC and therefore suitable heat
resisting cables must be used, with a rated service
temperature of at least 110ºC.
Figure 1
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Figure 2
4 off M6 Cover Screws
External Earth
Terminal
Plastic Acoustic Horn
Please see Safety Warning
in Section 7 of this manual
