Owner's Manual
MOUNTING LOCATIONS
The Tri-Gard can be mounted on any type of ceiling or wall.
The detector should be no closer than 4 feet from the glass to
be protected. Since the sound waves of breaking glass travel
directionally out at a 90° degree angle from the broken win-
dow, the best mounting location is on the opposite wall,
assuming the wall is within detection range.
For maximum performance install the detector in direct line of
sight to all glass that you are protecting and locate the detector
at least 1 foot from any corner or ceiling.
For best false alarm immunity the detector should be mounted
at least 4’ from the glass to be protected and from noise sources
such as kitchen sinks,stereos,televisions,etc.
WALL MOUNTING
Mount the detector on an opposite or adjacent wall from the
glass to be protected.
The unit should be mounted at least 6 feet from the floor. This
will ensure that no furniture or other objects will block the
direct line of sight, thereby providing maximum glassbreak
protection.
NOTE:The unit should not be mounted on the same wall as
the glass to be protected.
CEILING MOUNTING
Mount the 555LS/557LS in any location on the ceiling which
is in direct line of sight of the glass to be protected.
To ensure maximum glassbreak detection do not mount the
detector within 1 foot of any side wall.
Mount the 555LS/557LS on any solid material.
555LS/557LS OPERATIONS AND WIRING
On power-up the microprocessor will momentarily turn on
each LED.
LEDs Operation:
• Green LED ON–solid indicates unit is properly powered.
• Green LED OFF–indicates that the relay has dropped out,due
to the detector being tripped or no/low power (<10VDC).
• Green LED BLINKS–slowly to indicate that the unit is in test mode
(see test mode).
• Green LED FLASHES–when there are background noises
present within the detection range.
• Amber LED ON– solid indicates that the “Signature Supervision”
has not been able to test all circuits within the last120 hours.
• Red LED ON–solid indicates that the detector has been tripped
and is in a latched alarm memory condition.
• Red LED FLASHES–to indicate that there is an alarm for low
power condition, input voltage is (<10VDC).