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DSW308

Smoke Alarm User’s Manual

DSW308

 is a photoelectric smoke alarm, it accords with 

ISO/DIS 12239 standard. it has much effect to detect smoke.

IMPORTANCE! PLEASE READ THE MANUAL CAREFULLY 
AND SAVE IT

. The manual includes important information 

related to its operation, to ensure your safety, you should install 
one alarm in every room at least, don

t open the alarm easily 

to avoid bad effect.

Power source: 

DC 9V

Static current: 

<6.5uA

Alarm current:

 10mA

Alarm volume:

 >85db(3m)

Low voltage alarm:

 6.5V+0.5V

o

o

Working temperature:

 -5 C~+40 C

Working humidity: 

<93%RH

In the bedroom and corridor you should install one in every 

bedroom at least. 

On the top of the stairway, because where is the routeway for 

escape. 

You had better install alarm in every compartment on every 

floor, including attic and basement. 

Install one beside the electronic appliance. install it in the 

middle of the ceiling, because smoke always spread upwardly. 

If you can’t install it in the middle, it should also be installed 

beyond 10cm away from the wall(see diagram 1) 

If you install it on the wall, it should be 10~30.5cm away from 

the ceiling at least.(see diagram 2).

When your room’s length is beyond 9m, you should install 

more than one alarm. 

In the room with oblique roof(diagram 2) the alarm should be 

below 0.9m away from the top. 

In movable house, the alarm must be 10~30.5cm away from 

the ceiling, because the kind of house has no isolation layer. 
The place not fit to install

SPECIFICATION

THE PLACE FIT TO INSTALL:

o

C

Where there is burning, for example the unventilated kitchen, 

carbarn or fireplace etc. 

Near the fanner. 

In damp place ,the alarm should be 3m at least away from jet 

head in the bathroom or washing-dish machine. 

o

Where the ambient temperature is low than 4 C or high than 

38

, for example outdoor, unfinished attic. 

In the disorderly and dirty place, you should make sure that 

the washing-clothes room is clean then you can install the alarm.

In the very ventilated place, smoke will be spread completely. 

Where jam appear, don’t jam the detection window. where is 

beyond 305mm away from incadescent lamp or fluorescence 
lamp, the electronic appliance’s noise will cause false alarm.

In air dead angle, like the ceiling corner in the diagram1 

In the smoking meeting room, because smoke will cause 

alarm very easily. 

THE PLACE NOT FIT TO INSTALL:

CEILING

MINIMUM

10cm(4”)

M

IN

IM

U

M

1

0

c

m

(4

”)

M

A

X

M

U

M

3

0

.5

c

m

(1

2

”)

BEST HERE

NEVER HERE

ACCEPTABLE HERE

DIAGRAM 1

SIDE WALL

0.9m(3ft)

0.9m(3ft)

HORIZONTAL DISTANCE

FROM PEAK

DIAGRAM 2

ANYWGERE
IN THIS AREA

BEDROOM

BEDROOM

BEDROOM

KITCHEN

BEDROOM

LIVING ROOM

SINGLE FLOOR PLAN

SMOKE ALARM FOR MINIMUM PROTECTION

SMOKE ALARM FOR ADDITIONAL PROTECTION

MULTIPLE FLOOR PLAN

BEDROOM

BEDROOM

KITCHEN

BASEWENT

L

IV

IN

G

 R

O

O

M

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