__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)20 8743 8880
www.e2s.com Fax: +44 (0)20 8740 4200
Document No. IS 2425-P Issue B 17-04-02 Sheet 2 of 4
The units 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 message 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 electrical supply cables and to record a
message onto the units, 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
units.
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 Supply Selection
It is important that a suitable power supply is used to run the
Appello’s and that the cables used to connect the units to the
power supply are selected to ensure that they have the
necessary capacity.
The following table shows the input current taken by the
various sounder units:-
Unit Type
Input
Input
Max.
Voltage
Current
I/P Volts
BExA120D
24V DC
480mA
30V
BExA120D
230V AC
45mA
253V
BExA120D
115V AC
90mA
126V
BExA110D
24V DC
480mA
30V
BExA110D
230V AC
45mA
253V
BExA110D
115V AC
90mA
126V
The input current will vary according to the voltage input level
and the frequency of the tone selected. The current values
shown above are for the 554/440Hz tone @ nominal input
voltage. The above table also shows the maximum voltages at
which the units can be operated.
10)
Cable Selection
W hen selecting the cable size consideration must be given to
the input current that each unit draws (see table above), the
number of units on the line and the length of the cable runs.
The cable size selected must have the necessary capacity to
provide the input current to all of the Appello’s connected to
the line.
SAFETY W ARNING: If the Appello’s 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 95ºC.
11)
Earthing
Both AC and DC Appello units must be connected to a good
quality earth. The units are provided with internal and external
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
