DSC Meridian MN-220RT Instructies voor installatie en gebruik

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INSTRUCTIONS FOR

INSTALLATION AND USE

M N - 2 2 0 S E R I E S 2 - W I R E S M O K E D E T E C T O R S

READ THIS INSTRUCTION SHEET THOROUGHLY BEFORE

INSTALLING AND USING YOUR MERIDIAN SMOKE DETECTOR

Features

• Advanced 90° photoelectric detection pattern and specially

designed smoke chamber

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

• Solid-state LED red Indicator Light

• Optional auxiliary relay Form C

• 57°C (135°F) fixed temperature heat sensor option

• Magnet-activated Sensitivity Test Switch

• Attractive styling for any decor

• This symbol on the nameplate means that the product is

listed by Underwriters Laboratories Inc. (UL Standard 268,

Smoke Detectors for Fire Protective Signalling Systems.)

Protected under Canadian patent No. 1452296. Other patents pending.

Models

MN220

2-Wire Detector

MN220T

2-Wire Detector and Fixed Temp 57

MN220R

2-Wire Detector and Auxiliary Form "C" Relay

MN220RT

2-Wire Detector and Auxiliary Form "C" Relay and Fixed

Temp 57

C (135

Introduction

The DSC Meridian MN 220 Series Smoke Detectors are two-wire

smoke detectors intended for open area protection. They are suited

for commercial and institutional fire alarm systems.

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. Refer to the Instruction or User Manual for your alarm

system, and familiarise yourself with how the Fire Alarm functions of

your system operate. 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

Photoel ectri c

Sm oke Detector

for superior detection and dust

C (135

F) Sensor

Normally, light pulses in the Smoke Chamber

do not reach the light sensor

Smoke in the Smoke Chamber deflects light

into the light sensor, triggering an alarm.

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 Alarm Indicator Light will come ON and the Detector will

send an alarm signal to the control panel. The Auxiliary Relay, if

equipped, is also activated on alarm. When the smoke clears from

the chamber, the detector will remain latched in the alarm state

until reset by turning off the power supply from the control panel.

Units with the Temperature Sensor (T) option will activate an

Alarm Indicator Light and auxiliary relay to initiate an alarm at the

control panel also. When the high heat condition returns to

normal, the detector will remain latched in the alarm state until

reset from the control panel. Resetting is achieved by 2 seconds

of power down.

Alarm Indications

Condition

No Smoke or Heat

Smoke or Heat

Sensitivity Test

Functioning Normally

Sensitivity Test

Insufficient Sensitivity

No Smoke or Heat

but Latched in Alarm

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. Devices powered

from a control panel will not function if the control panel's AC and

battery backup power supplies both fail.

• Smoke detectors can only generate an alarm when smoke gets

inside 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 Instruction

Sheet; it is important that smoke detectors be located on at least

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

until smoke 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.

Alarm LED

Aux Relay

Pulse every

Deactivated

40 s

ON steady

Activated

Steady

Pulse every

Deactivated

40 s

Activated

steady