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P/N 550-0171-002 © 2001

CHESHIRE, CT  203-699-3300  FAX  203-699-3365

517T, 517TH & 517TC Series Photoelectric Type

Single Station/Multi-Station Smoke Alarms

AC Powered, 120V 60 Hz

INTRODUCTION

The 517T Series Smoke Alarm is a Photoelectric Type Alarm for use as

an evacuation device.  Each alarm has a solid state piezo that emits a temporal

3 signal to warn and alert the household to the presence of threatening smoke.

The 517TH Series Smoke Alarm is a combination photoelectric alarm and

heat detector.  The heat detector is an isolated  135ºF fixed temperature detec-

tor.

The 517TC Series Smoke Alarm also has a form A / form C relay con-

tact.

Your Photoelectric alarm is designed to detect the smoke that results

from an actual fire.  Consequently, it is uncommon for household smoke

such as cigarette smoke or normal cooking smoke to cause an alarm.

NOTE:

 Loss of electrical input will cause the alarm not to function.  For

maximum safety you should install both battery operated and AC powered
smoke alarms.

HOW YOUR SMOKE ALARM WORKS

The 517T Series Smoke Alarm operates on the photoelectric light scat-

ter principle.  The unit’s sensing chamber houses a light source and a light

sensor.

The darkened sensing chamber is exposed to the atmosphere and de-

signed to permit optimum smoke entry from any direction while rejecting

light from outside the alarm.

The light source is an infrared (invisible) LED which pulses every 8 sec-

onds.  The light sensor is a photodiode matched to the light frequency of

the LED light source.

Under normal conditions, the light generated by the pulsing infrared LED

is not seen by the light sensor, as it is positioned out of the direct path of

the light beam.  When smoke enters the sensing chamber, light from the

pulsing LED light source is reflected by the smoke particles onto the pho-

todiode light sensor.  At the first sighting of smoke, the alarm is put into a

pre-alarm mode.  This is indicated by a rapidly flashing LED on the face of

the alarm.  Once the light sensor confirms smoke for 2 consecutive pulses

inside the chamber, the light sensor produces the signal necessary to trig-

ger the alarm.

This technique of verifying the smoke condition, combined with a 5-to-1

signal-to-noise ratio, substantially reduces the possibility of nuisance alarms.

Installation Instructions - Owner's/User's Information Manual
READ CAREFULLY AND SAVE

·

When turning the test knob on the alarm to test 1 the red light emitting diode

should glow steady RED and horn should sound.  On some units, the red

LED will flash rapidly instead of glowing steady.  If AC power fails, the green

LED will turn off.

NOTE

:  Tandem Interconnect Models.

·

When  testing  one  alarm,  the  alarm  that  is  activated  will  light  the  red

indicator light emitting diode and sound its alarm horn, all other units will

sound the alarm horn with red indicator light emitting diodes remaining

off.

·

The test knob of your alarm simulates actual smoke conditions.

FIRE PROTECTION PLAN

This Smoke Alarm can quickly alert you to the presence of smoke—it

cannot prevent fire.  Please note that there are hazards against which smoke

detection may not be effective, such as smoking in bed, explosions, when

a closed door separates the alarm from the source of the smoke, etc.  The

ultimate responsibility for fire protection rests solely on you.

1. To minimize fire hazards—avoid improper storage of flammable liquids

and don’t leave small children home alone.

2. Bedroom doors should be closed while sleeping if a smoke alarm is

installed in the bedroom.  They act as a barrier against heat and smoke.

3. Establish an escape plan:

(a) Post a detailed floor plan depicting the chosen escape routes.

(b) Each bedroom should have at least two escape routes.

(c) Make sure your children know what to do in case of fire and teach

them to follow the escape plan you have posted.

(d) Agree on an outside meeting place.

(e) Conduct fire drills at least twice a year.

(f)

Be sure each member of the family is familiar with the smoke alarm

so they can react properly.

If the alarm should sound:

1. Never waste time dressing or gathering valuables.  Follow the escape

route and leave the house immediately.

2. Check bedroom doors before opening.  If the door is hot or smoke is

leaking in around the edges—DO NOT OPEN—use the alternate es-

cape route.

3. If there is smoke in the escape route—keep close to the floor and take

short breaths.  If possible, cover your nose and mouth with a wet cloth.

4. Do not use your own telephone—call the Fire Department from your

neighbor’s house.

5. Once out, do not re-enter your house, but proceed to your prearranged

meeting place.

WHAT  ELSE YOU  CAN  DO  TO  MAKE  YOUR
FAMILY SAFE FROM FIRES

Putting up smoke alarms is just the first step in protecting your family

from fires. You also must reduce the chances that fires will start in your

home and increase your chances of safely escaping if one does start.  To

have an effective fire safety program:

a. Install  smoke  alarms  properly  following  the  instructions  in  this

manual.  Keep your smoke alarms clean.  Test your alarm weekly

and have it repaired or replaced it when it no longer functions.  

As

with any electronic product, alarms have a limited life, and alarms that

don’t work cannot protect you.

b. Follow safety rules and prevent hazardous situations:

·

Use smoking materials properly; never smoke in bed.

·

Keep matches and cigarette lighters away from children.

·

Store flammable materials in proper containers and never use them near
open flames or sparks.

HOW TO TELL IF YOUR SMOKE ALARM IS

WORKING PROPERLY

·

Your alarm is provided with an alarm horn and pulsating Light Emitting (indi-

cator) Diode, which pulses every 15-30 seconds, and a green AC power on

LED on some models.

Summary of Contents for 517TH Series

Page 1: ...iode and sound its alarm horn all other units will sound the alarm horn with red indicator light emitting diodes remaining off The test knob of your alarm simulates actual smoke conditions FIRE PROTECTION PLAN This Smoke Alarm can quickly alert you to the presence of smoke it cannot prevent fire Please note that there are hazards against which smoke detection may not be effective such as smoking i...

Page 2: ...ther living unit is tested IMPORTANT NOTE WHAT SMOKE ALARMS CANNOT DO Smoke alarms will not work without power Battery operated alarms will not work without batteries with dead batteries or if the batter ies are not installed properly AC powered alarms will not work if their AC power supply is cut off by an electrical fire an open fuse or circuit breaker or for any other reason If you are concerne...

Page 3: ... OF THE FAMILY LIVING UNIT Where to Locate the Required Smoke Alarms in New Construction All of the smoke alarms specified for existing construction are required and in addition a smoke alarm is required in each bedroom Are More Smoke Detectors Desirable The required number of smoke alarms may not provide reliable early warning protection for those areas separated by a door from the areas protecte...

Page 4: ...as or next to bathrooms with showers The moisture in humid air can enter the sensing chamber as water vapor then cool and condense into droplets that cause a nuisance alarm Install alarms at least 10 feet 3 meters away from bath rooms In very cold or very hot environments or in unheated buildings or outdoor rooms where the temperature can go below or above the operating range of the alarm Temperat...

Page 5: ...ce no closer than 12 inches from the smoke alarm MAINTENANCE After your alarm has been in operation for a period of time or if it was in stalled prior to the completion of all building construction your alarm may have become more sensitive due to dirt build up in the alarm s optic sensing cham ber which could cause nuisance alarms or could cause activation from small amounts of smoke build up If t...

Page 6: ...EATES AN OBSCURATION THAT SIMULATES SMOKE THIS MEANS THE UNIT WILL GO INTO ALARM WITHOUT A FIRE CONDI TION LIMITED WARRANTY Providing Purchaser or Distributor notifies us promptly if within two 2 years from date of shipment from Edwards Company equipment or parts manufactured by us fail to function properly under normal use because of defects in material or workmanship demonstrated to our satisfac...

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