Meridian WLS906-433 Installation Manual

Mounting the Unit

Locate the smoke detector mounting plate on the wall or
ceiling and mark all desired screw locations*. Use the
supplied wall anchors for all screw locations. When the
anchors have been placed, secure the mounting plate
to the ceiling or wall.

To place the smoke detector on its mounting plate, align
the mounting plate's locking tab with the lock recess on
the case and turn the unit clockwise until it is firmly
secured. Insert the screw provided to secure the head
and mounting plate.

*Note: Select a smooth flat surface. If the mounting
surface is uneven, the unit may generate a tamper fault.

Dust Cover

The dust cover is intended to protect the unit from dust
and dirt entry, while the unit is not in service.

CAUTION: The smoke detector will not function with
the dust cover in place.

Installer’s Maintenance Instructions

Normally, the Meridian smoke detector will not require
maintenance. If the unit is mounted in a dusty environment,
the inlet areas of the case should be wiped gently with a
soft, dry cloth.

Be sure to inform the user and their monitoring station when
maintenance of any sort is performed on the smoke
detector or any part of the alarm control system. Always
test smoke detectors after maintenance. If a smoke detector
continues to generate nuisance alarms even after
maintenance, return the unit to your vendor for service.

EN54-7

Compliant

© 2001 Digital Security Controls Ltd., Toronto, Canada

www.dsc.com • Printed in Canada 29005729 R003

Installer’s Responsibility to the User

It is the installer’s responsibility to thoroughly instruct
the user on the operation, testing, and maintenance of
their system. The installer should fully explain and
demonstrate all functions of the alarm control system
and any equipment, such as smoke detectors connected
to it. The user should be provided with all instruction
sheets and manuals for their system and any components
connected to it. Complete and thorough instruction for
the user is essential to ensure they will obtain the
greatest benefit from their system. Providing the user
with complete operational information will also benefit
the installer through a reduction in service calls for
nuisance alarms.

Limited Warranty

Digital Security Controls Ltd. warrants that for a period of twelve months from the date of
purchase, the product shall be free of defects in materials and workmanship under normal use
and that in fulfilment of any breach of such warranty, Digital Security Controls Ltd. shall, at
its option, repair or replace the defective equipment upon return of the equipment to its repair
depot. This warranty applies only to defects in parts and workmanship and not to damage
incurred in shipping or handling, or damage due to causes beyond the control of Digital
Security Controls Ltd. such as lightning, excessive voltage, mechanical shock, water damage,
or damage arising out of abuse, alteration or improper application of the equipment.

The foregoing warranty shall apply only to the original buyer, and is and shall be in lieu of any
and all other warranties, whether expressed or implied and of all other obligations or liabilities
on the part of Digital Security Controls Ltd. Digital Security Controls Ltd. neither assumes,
nor authorizes any other person purporting to act on its behalf to modify or to change this
warranty, nor to assume for it any other warranty or liability concerning this product.

In no event shall Digital Security Controls Ltd. be liable for any direct, indirect or consequential
damages, loss of anticipated profits, loss of time or any other losses incurred by the buyer in
connection with the purchase, installation or operation or failure of this product.

Smoke detectors that are a part of this system may not properly alert occupants of a fire for
a number of reasons, some of which follow. The smoke detectors may have been improperly
installed or positioned. Smoke may not be able to reach the smoke detectors, such as when
the fire is in a chimney, walls or roofs, or on the other side of closed doors. Smoke detectors
may not detect smoke from fires on another level of the residence or building.

Every fire is different in the amount of smoke produced and the rate of burning. Smoke
detectors cannot sense all types of fires equally well. Smoke detectors may not provide
timely warning of fires caused by carelessness or safety hazards such as smoking in bed,
violent explosions, escaping gas, improper storage of flammable materials, overloaded
electrical circuits, children playing with matches or arson.

Even if the smoke detector operates as intended, there may be circumstances when there
is insufficient warning to allow all occupants to escape in time to avoid injury or death.

Warning: Digital Security Controls Ltd. recommends that the entire system be completely tested
on a regular basis. However, despite frequent testing, and due to, but not limited to, criminal
tampering or electrical disruption, it is possible for this product to fail to perform as expected.

Important Information: Changes or modifications not expressly approved by Digital
Security Controls Ltd. could void the users authority to operate this equipment.

WLS906-433 EU

Wireless Smoke Detector
For Residential Use

INSTRUCTIONS FOR
INSTALLATION AND USE

READ THIS INSTRUCTION SHEET THOROUGHLY

BEFORE INSTALLING AND OPERATING YOUR

MERIDIAN SMOKE DETECTOR

Introduction

The DSC Meridian wireless photoelectric smoke detector
incorporates many advanced design and technical
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 — any smoke detector will be rendered
useless if it is not properly connected or located.

It is very important that you understand how to test and
maintain your system. Read the

Manual

for your alarm system to familiarize yourself with

Instruction

the fire alarm functions. Be sure to test your system
regularly by 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, then 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
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.

the smoke clears from the smoke chamber, the unit
will automatically reset itself.

or

When

User

Alarm Indications

Condition Sounder Indicator RF

No smoke Silent Flash every Supervision

Smoke Alarm Flash every Alarm

Automatic self-test Silent Flash every Supervision
functioning normally 40-50 s transmission

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

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

Light Transmission

40-50 s transmission

every

12 minutes

0.67 s transmission

every

12 minutes

every

12 minutes

Limitations of Smoke Detectors

While the Meridian smoke detector has been designed
for reliability, it is important to know that all smoke
detectors have limitations.

• Smoke detectors will not work without power. If the
batteries are low, the smoke detector will not function.
See ‘Battery Installation’ below for important
information on battery use.

• Smoke detectors can only generate an alarm when
smoke enters the smoke chamber; anything that
prevents smoke from entering the smoke chamber
may prevent or delay an alarm. Refer to the ‘Guidelines
for Locating Smoke Detectors’ on this
It is important that smoke detectors be located on every
floor of the premises, preferably in every room. It is also
important to avoid obstructions, such as closed doors
that may prevent smoke from reaching the unit. A
smoke detector will not detect a fire in the walls, in the
chimney or on the roof of a building. It will only detect
smoke when it enters the smoke chamber.

• Smoke detectors have certain obvious limitations:
they may not provide protection for someone smoking
in bed, for children playing with matches, or for
sudden and violent explosions. A smoke detector is a
single part of overall fire safety precautions; the smoke
detector should never be seen as a substitute for a
complete fire safety program.

Instruction Sheet

.

Guidelines for Locating Smoke Detectors

On smooth ceilings, detectors may be spaced 9.1m (30
feet) apart as a guide. Other spacing may be required
depending on ceiling height, air movement, the presence
of joists and uninsulated ceilings. Consult appropriate
national standards for installation recommendations.

• Do not locate smoke detectors at the top of peaked or
gabled ceilings; the dead air space in these locations
may prevent the unit from detecting smoke.

• Avoid areas with turbulent air flow, such as near
doors, fans or windows. Rapid air movement around
the detector may prevent smoke from entering the
unit.

• Do not locate detectors in areas of high humidity.

• Do not locate detectors in areas where the temperature

rises above 38

Bedroom Bedroom

Living RoomKitchen

o

C (100oF) or falls below 5oC (41oF).

Bedroom

Bedroom

Living
Room

Basement

Bedroom

Dining
Room

Testing Your Smoke Detector

Follow the test procedure described here or contact
your smoke detector dealer or installer for testing
instructions.

It is recommended that your entire alarm system be
tested at least once a week to verify the operation of
all system functions.

Smoke Detector Unit Test

To test the smoke detector, press and hold the test
button on the front of the unit. When the button is
pressed, the unit’s alarm should sound. When the button
is released, the alarm should cease. If this does not

occur, check that the batteries are the correct type, in
good condition and are installed correctly (see the

‘

Battery Installation’ section below).

Upon completing the functional testing of the smoke
detector, check the unit’s sensing chamber to ensure
proper operation. To test the sensing chamber, waft a
lit cotton wick or punk stick around the outside of the
unit until a generous amount of smoke enters the
sensing chamber or the unit alarms. If the smoke
detector does not function properly, call your smoke
detector installer or dealer for service.

System Test

To prepare your alarm system for a complete test, refer to
the testing instructions section of your system’s manual.

Observe carefully all instructions regarding
notification of the monitoring station in order to avoid
an unnecessary emergency response.

When the system
is ready to be tested, hold the test magnet against the
smoke detector case as shown below. After activating
the smoke detector’s system test, an alarm should
sound and the LED indicator light should flash every

0.67 seconds. When the magnet is removed, the alarm
should cease.

See your system manual for further
instructions regarding completion of the alarm
system test.

Owner’s Maintenance Instructions

The Meridian smoke detector is designed to require
minimum maintenance. If the case becomes dusty, then
wipe the case gently with a soft dry cloth. If the case is
greasy, wipe the case gently with a soft cloth slightly
dampened with soapy water.

Never disassemble the smoke detector; there are no
user serviceable parts inside the unit. Never paint
the unit, as paint may prevent smoke from entering
the unit. If you are planning renovations or repainting,
contact your installer and ask that the unit be
temporarily removed until work is complete.

If the unit is located in an area where it is exposed to
high levels of dust or insects and causes false alarms,
it may require service; contact your smoke detector
installer or dealer.

Fire Safety In The Home

Most fires occur in the home, and to minimize this danger,
it is recommended that a household fire safety audit be
conducted and a family escape plan be developed.

Household Fire Safety Audit

1 Are all electrical appliances and outlets in safe

condition? Check for frayed cords, overloaded
lighting circuits, etc. If you are uncertain about the
condition of your electrical appliances or household
service, have a professional evaluation.

2 Are all flammable liquids safely stored in closed

containers, and in a cool and well ventilated area?
Cleaning the unit with flammable liquids should be
avoided.

3 Are hazardous materials such as matches out of the

reach of children?

4 Are furnaces and wood burning appliances properly

installed, clean, and in good working order? If in
doubt, have a professional evaluation.

Family Escape Planning

There is often very little time between the detection of a
fire and the time it becomes deadly. Because of this, it
is very important that a family escape plan be developed
and rehearsed.

1 Every family member should participate in developing

the escape plan.

2 Study the possible escape routes from each location

within the house. Since many fires occur at night,
special attention should be given to the escape routes
from sleeping quarters.

3 It is essential that escape from a bedroom be possible

without opening the interior door. Consider the
following when making your escape plans:

• Make sure that doors and windows that open to the outside
are easily opened. Ensure that they are not painted shut
and that the locking mechanisms operate smoothly.

• If opening the exit or using the exit is too difficult for
children, the elderly or handicapped, plans for their
rescue should be developed. This plan includes
making sure that those who are to perform the rescue
can promptly hear the fire warning signal.

• If the exit is above the ground level, an approved fire
ladder or rope should be provided, as well as training
in its use.

• Exits on the ground level should be kept clear. Be sure to
remove snow from exterior patio doors in the winter and
outdoor furniture or equipment should not block exits.

• The family should have a predetermined assembly
point where everyone can be accounted for; for
example, across the street or at a neighbour’s house.

• Once everyone is out of the house, call the Fire
Department.

• A good plan emphasizes a quick escape. Do not
investigate first or attempt to fight the fire, and do not
attempt to rescue belongings or valuables as this
takes up time. Once outside, do not re-enter the
house; wait for the Fire Department.

• Write the plan down and rehearse it frequently so that
should an emergency ever arise, everyone will know
what to do. Revise the plan as conditions change; for
example, when there are more or fewer family members
in the home or if there are changes to the house.

• Make sure your fire warning system is operational by
conducting weekly tests. If you are unsure about system
operation, contact your smoke detector installer or dealer.

• It is recommended that you contact your local Fire
Department and request further information on home
fire safety and escape planning. If available, have
your local fire prevention officer conduct an in-house
fire safety inspection.

Enrolling a WLS906

On the back of the smoke detector housing, there is a
five digit and/or six digit serial number. Please refer to
your receiver installation manual for information on which
serial number should be enrolled.

Installation Instructions

Specifications

• Operating Voltage: 9V (six AA alkaline batteries)

• Smoke Sensitivity: 0.17 - 0.23 db/m

• Ambient Installation Operating Range:

32°F - 100°F / 0°C - 37.8°C
5% - 95% RH, non-condensing

• Field Test: Magnet-activated reed switch or pushbutton
and Gemini 501 Smoke Detector Analyser

Battery Installation

Remove the mounting plate from the detector by pushing
the locking tab and turning the mounting plate counter­clockwise.

Hold the unit with the battery compartment facing you,
and the imprinted wording right-side up. Install the first
two batteries in the row nearest to you, with the +
terminals facing left. Next, install the middle two
batteries with the + terminals facing to the right. Place
your thumb over the centre of these four batteries to
keep them in place. Install the last two batteries, with
their + terminals facing to the left, by snapping them
past the nylon retainer.

Use six AA Alkaline Energizer E91 or Duracell MN1500
batteries. Do not use other brands of batteries for the
smoke detector. Using brands other than the
Energizer E91 or Duracell MN1500 may affect the
operation of the system. Replacement batteries may
be purchased in supermarkets and hardware stores.