Introduction
The DSC Meridian photoelectric smoke detector incorporates
many advanced design features to provide years of reliable
operation. It is important to follow the installation and operation
instructions on this sheet to ensure that the unit will function
properly — even the best designed smoke detector will be rendered
useless if it is not connected or located properly.
It is very important that you understand how to test and maintain
your system. Read the instruction or user manual for your alarm
system to familiarise yourself with the fire alarm functions. Be sure
to test your system regularly following the test procedures described
in your manual. If you should ever have problems operating or
testing your system, and especially if there are problems with the
fire alarm functions, contact your smoke detector installer or
dealer immediately for service.
While smoke detectors and alarm systems are designed to warn you
of potentially dangerous situations, no system can prevent emergencies.
An alarm system is not a substitute for life and property insurance; you
should always maintain appropriate insurance coverage.
How the Smoke Detector Works
As shown in the illustration, a light source is directed across the
smoke chamber and is not normally reflected into the sensing
element. When smoke enters the chamber, the light beam is
scattered by the smoke and is reflected into the sensor. When
enough light is detected by the sensor, an alarm is activated. On
alarm, the sounder is activated and the red LED will flash.
When
the smoke clears from the smoke chamber, the unit will
automatically reset itself.
Alarm Indications
Condition
Sounder
Indicator
RF
Light
Transmission
No smoke
Silent
Flash every
Supervision
40-50 s
transmission
every 12 min.
Smoke
Alarm
Flash every
Alarm
0.67 s
transmission
Automatic self test
Silent
Flash every
Supervision
functioning normally
40-50 s
transmission
every 12 min.
Automatic self test
Chirp between
Flash every
Fire Trouble
insufficient sensitivity
LED flashes
40-50 s
transmission
Push-button test
Alarm
Flash every
Supervision
functioning normally
0.67 s
transmission
every 12 min.
Push-button test
Silent
Flash every
Fire Trouble
insufficient sensitivity
40-50 s
transmission
Magnet/reed switch
Alarm
Flash every
Alarm
test functioning normally
0.67 s
transmission
Magnet/reed switch
Silent
Flash every
Fire Trouble
test insufficient
40-50 s
transmission
sensitivity
Low battery
Chirp simultaneous
Flash every
Fire Trouble
with LED flash
40-50 s
transmission
READ THIS INSTRUCTION SHEET THOROUGHLY BEFORE
INSTALLING AND USING YOUR MERIDIAN SMOKE DETECTOR
Features
• Advanced 90° photoelectric detection pattern and specially
designed smoke chamber
∗∗∗∗∗
for superior detection and dust
resistance
• Unique high signal-to-noise ratio and superior RFI
immunity to prevent false alarms
• Excellent smoke access provides reliable detection for all
smoke flow directions and velocities
• Loud 85dB piezoelectric alarm horn
• Battery-powered design for easy installation and
independence from house power sources
• Uses six AA batteries and special circuit design to provide
extra long battery life
• Solid-state LED indicator light (red)
• Visible flash light and audible trouble chirp for low battery
warning
• Equipped with an RF transmitter, WLS906 can
communicate with DSC's UL listed, compatible 900 MHz
Wireless Security Systems
• Test button allows user to perform sensitivity test and get
a local indication of test result
• Magnet-activated/reed switch allows user to perform
system test
• Battery removal sensor alerts user to missing battery and
prevents installation of detector when no battery is
installed
• Automatic self-test once every 40 seconds provides an
audible trouble indication if the unit has insufficient smoke
sensitivity
• Attractive styling for any decor
• This symbol on the nameplate means the product is
listed by Underwriters Laboratories Inc. (UL
Standard 217, Single and Multiple Station Smoke
Detectors).
∗∗∗∗∗
Protected under Canadian Patent No. 1452296. Other patents pending.
WLS906
Battery-Powered Smoke Detectors
For Residential Use
INSTRUCTIONS FOR
INSTALLATION AND USE
