__________________________________________________________________________________________________________________________________
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 2453-P Issue E 12-03-10 Sheet 2 of 4
Temperature Classification:
T1
400
o
C
T2
300
o
C
T3
200
o
C
T4
135
o
C
Area Classification Dust:
Zone 21
Explosive dust air mixture likely to occur in
normal operation.
Zone 22
Explosive dust air mixture not likely to occur,
and if it does, it will only exist for a short time.
IP Rating
IP67
T100ºC Ta < +55ºC
T115ºC Ta < +70ºC
Equipment Category:
2G/D
Ambient Temperature Range:
-50
°
C to +55
°
C
Gas Groups IIA, IIB and IIC
-50
°
C to +70
°
C Gas Group IIA and IIB
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)
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.
8)
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
BExDL25D
100V Line
25W
100V
BExDL25D
70V line
25W
70V
BExDL25D
8 ohm
25W
14.14V
BExDL25D
16 ohm
25W
20V
BExDL15D
100V Line
15W
100V
BExDL15D
70V Line
15W
70V
BExDL15D
8 ohm
15W
10.95V
BExDL15D
16 ohm
15W
15.49V
The above table also shows the maximum AC signal voltages
at which the loudspeakers can be operated.
Figure 1
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Figure 2
4 off M6 Cover Screws
External Earth
Terminal
Plastic Acoustic Horn
(Anti-static Plastic)