__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 [email protected] Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
Document No. IS 2424-P Issue B 17-04-02 Sheet 2 of 4
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 loudspeaker 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
Access to the flameproof enclosure will not normally be
necessary as the cables enter the unit in the Ex ‘e’ Increased
Safety Termination enclosure. Access will only be required if
you need to fit an end on line monitoring component (see
section 15 of this manual). To gain access to the flameproof
enclosure, remove the four M6 hexagon socket head screws
(see figure 2) and withdraw the terminal chamber 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
sounders.
It is therefore important that these screws and their
spring washers are kept in a safe place during installation.
On completion of the fitting of the monitoring component 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 that the ‘O’ ring seal is in place.
W hen replacing the terminal chamber section casting, ensure
that it is square with the flameproof chamber casting before
inserting. Carefully push the section in place allowing time for
the air to be expelled. Only after the section 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 section
jams while it is being inserted, carefully remove it and try
again. Never use the M6 cover bolts to force the cover into
position.
9)
Access to the Increased Safety Terminal
Chamber
To connect the cables to the loudspeaker it is necessary to
remove the terminal cover to gain access to the termination
chamber. To achieve this remove the four M4 hexagon socket
head screws (see figure 2). The four M4 screws and their
spring washers are grade A4 stainless steel and they should
be kept in a safe place during installation. Before replacing the
terminal cover ensure that the earth bonding wire between the
two castings is secure and that the ‘O’ ring seal is in place.
Insert the four M4 hexagon screws and their spring washers
and tighten them down.
10)
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 100V line
matching transformer fitted must be connected to a power
amplifier with a 100V line output. Low impedance 8 ohm or 16
ohm loudspeakers must be connected to amplifiers with a
suitable low impedance output.
Figure 1
Flameproof
Chamber
Terminal
Cover
S/S Mounting
Bracket
Figure 2
Flameproof Chamber
4 off M6 Cover Screws
External Earth
Terminal
Figure 3
Internal Bonding
Wire Terminal
Increased Safety
Chamber
4 off M4 Cover Screws
Terminal
Chamber
1
2
3
4
5
6
7
8
9
1 0
11
12
2 off M20
Cable Entries
Internal Earth Terminal
Plastic Acoustic Horn
Please see Safety Warning
in Section 7 of this manual
