E2S GNEXS1DC024 Instruction Manual page 2

Equipment Category: 2G
Temperature Classification:
T1 400
T2 300
T3 200
T4 135
T5 100
T6 85
Ambient Temperature Range:
GNExS1 - For range see Marking Codes Section 2
GNExS2 - For range see Marking Codes Section 2
6) Sounder Location and Mounting
The location of the sounders should be made with due regard
to the area over which the warning signal must be audible.
The sounders should only be fixed to services that can carry
the weight of the unit.
The sounder should be securely bolted to a suitable surface
using the 7mm diameter bolt holes 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.
Plastic Acoustic Horn
Please see Safety Warning
in Section 7 of this manual
Figure 1
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 to the sounder
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve by loosening the M3
Grub Screw within the flameproof cover, and then unscrew
the flameproof cover, taking extreme care not to damage the
flameproof joints in the process.
www.acornfiresecurity.com
o
C
o
C
o
C
o
C
o
C
o
C
Flameproof Flameproof
Chamber Cover
S/S Mounting
Bracket
www.acornfiresecurity.com
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 'O' ring seal is in place. When replacing the
flameproof cover ensure that it is tightened fully with tool
provided.
9) Power Supply Selection
It is important that a suitable power supply is used to run the
sounders. The power supply selected must have the
necessary capacity to provide the input current to all of the
sounders connected to the system.
The following table shows the input current taken by the
various sounder units:-
Unit Input
Type Voltage
GNExS2 12V DC
GNExS2 24V DC
GNExS2 48V DC
GNExS2 230V AC
GNExS2 115V AC
GNExS1 12V DC
GNExS1 24V DC
GNExS1 48V DC
GNExS1 230V AC
GNExS1 115V AC
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 above table also shows the maximum
voltages at which the sounders can be operated.
10) Cable Selection
When selecting the cable size consideration must be given to
the input current that each unit draws (see table 2 of 4), the
number of sounders 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 sounders
connected to the line.
SAFETY WARNING: If temperature exceeds 70ºC at entry or
80ºC at branching point use suitably rated cable and cable
glands.
Figure 2
Input Max.
Current I/P Volts
683mA 30V
811mA 30V
434mA 58V
196mA 260V
297mA 260V
120mA 30V
140mA 30V
73mA 58V
75mA 260V
86mA 260V