Chapter 2: Installation and assembly
LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook 29
Figure
19
: Command module power supply connections
(1) 0 volt
(2) Safety earth
(3) +24 VDC
Note: The safety earth connection must be separate and not connected to the
GND (ØV) connection.
Demonstration mode
In normal use, the detector remains in a reduced sensitivity mode for 24 hours
while it gathers information about its environment. For purposes of
demonstration, for example, to verify a new installation, this may be disabled by
putting the detector into “Demonstration Mode.” This special operating mode
bypasses the 24-hour learning process and allows the detector to operate at a
high sensitivity after only 15 minutes learn time.
To enter demonstration mode, the detector must be in FastLearn mode. While
FastLearn is running, hold down the front panel <RESET> button and while
holding this, simultaneously press the <TEST> and <ISOL> buttons. The
<RESET> and <ISOL> buttons do not need to be enabled for this function.
When entering demonstration mode, the detector front panel LCD display will
show the legend “Demo mode” and the time and date on which this was invoked.
Note: Demonstration mode should only be used for demonstrations. It should not
be used as a substitute for normal operation, as the alarm settings in this mode
are based solely on the sparse data gained during the 15 minute FastLearn
period. Over time, this would lead to nuisance alarms due to normal variation in
the detector’s environment. To cancel demonstration mode, invoke a new
FastLearn.
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