User and Installation Manual
ALPHA 16 - 248 GBR
Conventional Modular Fire Alarm
Control Panel
Document :
MUALPHA16248GB
Index
: A
Date
: 26/03/07
Page
: 20/49
Í
NOTE:
Alarms originating from lines configured as instant do not trigger the alarm delay count but immediately
generate the activation of the outputs
.
4-4 FUNCTION OF FIRST ALARM AUTO-RESET:
At the configuration stage it is possible to set the lines for the function of auto-reset of the first alarm.
Auto-reset of the first alarm is a filter function which makes it possible to ignore suspect alarm conditions.
The auto-reset logic is as follows:
a) If an alarm condition is detected by a detector on a line set for auto-reset, it does not trigger the alarm in the
corresponding zone but activates an internal delay of 3 seconds.
b) If an alarm condition is detected in this period by another detector, it is recognised by the panel as true (AND of two
alarms generate the true alarm).
On the contrary, at the end of the 3 seconds, the panel activates the auto-reset of the lines for a few seconds (reset
time programmed during configuration), thus allowing the physical reset of the line which caused the starting condition.
Í
NOTE:
The auto-reset does not cancel any signals of alarm/fault previously memorized on the panel LED and
display, but in any case intervenes at a global level, temporarily removing the power supply from all panel
consumption lines to allow the physical reset.
c) After the auto-reset time, the panel starts a 5-minute internal count.
If another state of alarm occurs during this time on any line (including the one which caused the starting condition), the
panel triggers a true alarm and starts the 5-minute internal count again. On the contrary, at the end of this period, the
alarm filter function is reset as in point a).
4-5 TEST ZONE FUNCTION:
The TEST function makes it possible to try out the system without activating the alarm actuators.
On the ALPHA 16 - 248 panel, the test can also be activated for individual zones, as required by UNI EN54-2.
To activate/deactivate the test function press the ON/OFF button beside the ‘Test enabled’ LED when in access level 2
(the test mode state is indicated by the LED coming on and a message on the display). The individual zones to be tested
(see section 5-7) must then be selected using the numerical keyboard and display and
confirmed with key 9
. If key 9 is
pressed without selecting a zone, the test is activated globally across all zones.
The zones are being tested when the yellow LOCK/TEST LED flash on and off (the on time is longer than off time).
All alarms originating from lines which are controlled by zones selected for testing are treated by the panel with the
following logic:
a) The panel buzzer is activated.
b) Each alarm is signalled on the display and memorized on the relative zone LED.
c) A few seconds after an alarm is activated, the panel carries out an automatic reset of the detector lines without deleting
the memory on the LED/display.
Í
NOTE:
The zones not selected for testing remain fully operational and in the event of an alarm activate the relative
signalling/command components (sounders).
The test function deactivates automatically after 30 minutes if no command operations are carried out, or can be instantly
deactivated by pressing the ON/OFF button again located next to the Test enabled LED.
Í
NOTE:
While the test function is on, access level 2 also remains on.
5- COMMAND FUNCTIONS:
5-1 OPERATING LEVELS AND 2
nd
ACCESS LEVEL ACTIVATION:
As provided for by standard UNI EN 54-2, the panel controls several operating levels for carrying out command and
configuration operations.
The operating levels follows:
- Level 1 (commands not enabled):
The most basic operating level, always ready and intended for the public or those who have general surveillance duties.
