__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)20 8743 8880
www.e-2-s.com Fax: +44 (0)20 8740 4200
Document No. IS 2457-P Issue E 12-03-10 Sheet 2 of 4
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)
Sontel Location and Mounting
The location of the Sontels should be made with due regard to
the area over which the warning signal must be audible. And
they should only be fixed to services that can carry the weight
of the unit.
The Sontels 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 electrical supply cable and the
telephone line cable to the Sontel 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
Sontels.
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 washer 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 Supply Selection
It is important that a suitable power supply is used to run the
Sontels.
The following table shows the input current taken by the
various units:-
Unit Type
Input
Input
Max.
Voltage
Current
I/P Volts
BExDTS110D
24V DC
265mA
30V
BExDTS110D
12V DC
195mA
15V
BExDTS110D
48V DC
130mA
58V
BExDTS110D
230V AC
56mA
264V
BExDTS110D
110V AC
93mA
121V
BExDTS110D
115V AC
110mA
126V
The input current will vary according to the voltage input level
and the frequency of the tone selected. The current levels
shown above are for the 440Hz Continuous tone @ nominal
input voltage. The units have a switching voltage regulator
circuit and therefore the input current level will decrease
slightly as the input voltage in increased and will increase
slightly as the input voltage is reduced.
The above table also shows the maximum voltages at which
the sontels can be operated.
Figure 1
Plastic Acoustic Horn
(Anti-static Plastic)
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Figure 2
4 off M6 Cover Screws
External Earth
Terminal