Watchguard SMODETI240 User Manual

ART-SD3792A-00, REV.00

Hardwired Ionization Smoke Alarm with Silence and
Interconnectable Function (

Model No: SMODETI240)

BACKGROUND

There are two different types of smoke alarms currently in general use: the ionization smoke
alarm and the photoelectric smoke alarm. While both types of alarms are suitable for general
residential use, an ionization smoke alarm will normally response faster to fast flaming fires
while a photo-electric smoke alarm may be more sensitive in detecting slow smoldering fires.
Because home fires develop in different ways and are often unpredictable in their growth, it
is impossible to predict which type of alarm will provide the earliest warning. For best home
protection install at least one photoelectric and one ionization smoke alarm.

RECOMMENDED LOCATION OF ALARMS

* As close to the center of the ceiling as possible; or at least no closer than 61cm to any

wall or corner. If mounting smoke alarm on wall, always locate the top of the smoke
alarm 10 to 30.5 cm from ceiling (see Diagram A).

* As a minimum, smoke alarms should be located between sleeping areas and potential

sources of fire such as a kitchen, heated garage or basement. In single storey homes with
one sleeping area, an alarm should be installed in the hallway outside the bedrooms. In
single storey homes with two sleeping areas, a minimum of two alarms are required: one
outside each sleeping area. In multilevel homes (includes guest, hostel etc.), an alarm
should be installed outside and inside each sleeping area, in the basement and on every
level of the home.

* Additional smoke alarms should be installed in bedrooms in anticipation of fires

originating within these rooms, caused by faulty wiring lamp, appliances, smoking or
other hazards.

* For best protection, smoke alarms should be installed in every room, or every level of

your home.

* Install smoke alarms in hallway at a distance no longer than 4 meters from the farthest

wall and no greater than 8 meters from the next alarm.

* The distance from the apex of cathedral ceiling to the top of the smoke alarm should be

90cm minimu m.

AVOID THESE LOCATIONS

IN ORDER TO AVIOID A DECREASE IN OPERATIONAL EFFECTIVE, DO NOT
LOCATE YOUR SMOKE ALARM IN:

* the kitchen - smoke from cooking might cause an

unwanted alarm.

* the garage - products of combustion are present

when you start your automobile.

* the front of forced air ducts used for heating and air

conditioning.
* the peak of an "A" frame type of ceiling.
* areas where temperatures may fall below 5

o

C or rise above 45oC.
* areas where relative humidity may be out from 10% to 90%.
* the ceiling in a caravan or similar rooms. The shining sun is heating the ceiling and the

air at the upper part of the room. Hot air at the ceiling prevents smoke from a dangerous
smolder process from reaching the smoke alarm. (In this case, mount it on internal walls.)

DEVELOP AND PRACTICE A PLAN OF ESCAPE

BASICS OF ESCAPE PLAN
* Make a floor plan indicating all doors and windows and at least two escape routes from

each room. Second story windows may need a rope or chain ladder.

* Have a family meeting and discuss your escape plan, showing everyone what to do in

case of fire.

* Determine a place outside your home where all of you can meet if a fire occurs.
* Familiarize everyone with the sound of the smoke alarm and train them to leave your

home when they hear the sound.

* Identify children's bedrooms with red stickers placed in the upper left corner of the

windows for easy identification.

* Practice a fire drill at least six months. Practice allows you to test your plan before an

emergency. You may not be able to reach your children. It is important they know what
to do.

WHAT TO DO WHEN THE ALARM SOUNDS

ART-SD3792A-00, REV.00

* Leave immediately by your plan of escape. Every second counts, so don't waste time

getting dressed or picking up valuables.

* In leaving, don't open any inside door without first feeling its surface. If not, or if you

see smoke seeping through cracks, don't open that door! Instead, use your alternate exit.
If inside door is cool, place your shoulder against it, open it slightly and be ready to slam
it shut if heat and smoke rush in.

* Stay close to the floor if air is smoky. Breathe shallowly through a cloth, wet if possible.
* Once outside, go to your selected meeting place and make sure everyone is there.
* Call the fire department from your neighbor's home - not from yours.
* Don't return to your home until fire officials say that it is all right to do so.

FALSE ALARMS

The smoke alarm is designed to minimize false alarms. Smoking will not normally set off
the alarm unless smoke is blown directly into the smoke alarm. Combustion particles from
cooking may set off the alarm if the smoke alarm is located close to the kitchen cooking
surface. Large quantities of combustion particles are generated from spills or broiling.
If the smoke alarm does sound, check for fires first. If a fire is discovered, get out and
call the fire department. If no fire is present, check to see if one of the reasons listed above
may have caused the alarm.

INSTALLATION AND MOUNTING INFORMATION

The alarm must be installed by licensed electrical contractor only!

The smoke alarm will function correctly either as a stand-alone alarm or inter-connected.
All inter-connected smoke alarms must be supplied from a single power circuit.
Do not connect Inter-connect wire to Live or Neutral.
Do not connect the smoke alarm to a circuit protected by a Residual Current Device.
Connect and powered the smoke alarm with 220-240VAC only.

Solid wires with 1mm

2

(or larger) cross-section area are recommended for power supply and
inter-connection. Strip the Live, Neutral, and Inter-connect wires back to the length of
10mm. Connect the wires to the terminals in the wall mount and ensure the screws are fully
tightened. The colors of wires are: Live=Brown; Neutral=Blue, Inter-connect=White. The
smoke alarms can be inter-connected as many as 20 units in series. Check the connections

carefully before closing the junction box. Incorrect connection may damage the unit.

Your smoke alarm is designed for easy mounting on wall or ceiling. Ideally, this smoke
alarm is designed for mounting on standard flush box (84mm mounting centers). Place the
mounting bracket on it and locate the screw-holes of flush box. Then attach the bracket
directly on it with the screws provided. Then, check the mounting firmly.

For mounting without standard flush box, place the mounting bracket on the wall or ceiling
surface, use the pencil to mark down two drill-holes location on it. Usually, the distance
between two centers of drill-holes should be 84mm. For wooden surface, attach the brack et
directly on it with the screws provided. For the concrete surface or masonry, use drilling
machine to drill these two holes on the surface firstly. The sizes of holes are around 5.5mm
diameter and 25-30mm deep. Insert two dowels into the drilled holes before attached the
bracket. Then, check the mounting firmly.

Insert a 9VDC battery. Fold the alarm to wall mount tightly. The alarm cannot be hooked

if the battery is not installed properly.

Green LED will be brightened. Press TEST button to check the alarms work. Inter­connected alarms must also be checked. Do not leave installation until the alarms have

been checked for correct operation.

During power up the unit, several ‘beep’ alarming may happen. It is normal operation
for the unit.

OPERATION, TESTING & MAINTENANCE

OPERATION