DSC Meridian MN-220 Series, Meridian MN-220T, Meridian MN-220R, Meridian MN-220RT Instructions For Installation And Use Manual
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Photoe lect r ic
Bedroom
Bedroom
Basement
Living
Room
Dining
Room
Bedroom Bedroom
Bedroom
Living Room
Kitchen
Sm oke Det ec t or
INSTRUCTIONS FOR
INSTALLATION AND USE
MN-220 SERIES 2-WIRE SMOKE DETECTORS
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
o
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
∗∗
∗
∗∗
C (135oF) Sensor
for superior detection and dust
o
C (135oF) 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 Alarm LED Aux Relay
No Smoke or Heat Pulse every Deactivated
Smoke or Heat ON steady Activated
Sensitivity Test ON Activated
Functioning Normally Steady
Sensitivity Test Pulse every Deactivated
Insufficient Sensitivity 40 s
No Smoke or Heat ON Activated
but Latched in Alarm steady
40 s
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.
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Guidelines for Locating Smoke Detectors
Bedroom
Bedroom
Basement
Living
Room
Dining
Room
Bedroom Bedroom
Bedroom
Living Room
Kitchen
On smooth ceilings, detectors may be spaced 9.1m (30 feet) apart
as a guide. Other spacings may be required depending on ceiling
height, air movement, the presence of joists, uninsulated ceilings,
etc. Consult National Fire Alarm Code NFPA 72, CAN/ULC-S553M86 or other 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
o
C (100oF) or falls below 5oC (41oF).
38
Figure 1
Bedroom
Smoke detectors should always be installed in accordance with NFPA 72, the
National Fire Alarm Code. Smoke detectors should always be located in
accordance with Paragraph 2.1.1.1 of NFPA 72, Chapter 2.:
“2-2.1.1.1 Smoke detectors shall be installed outside of each separate
sleeping area in the immediate vicinity of the bedrooms and on each
additional story of the family living unit, including basements and excluding
crawl spaces and unfinished attics. In new construction, a smoke detector
also shall be installed in each sleeping room.”
Ceiling
Acceptable
NOTE: Measurements shown are to
Figure 2
Family Room
Dining
Room
Kitchen
Figure 4Figure 3
here
NEVER
HERE
Top of detector
acceptable here
the closest edge of the detector.
Living
Room
Bedroom
4"
(0.1m)
Bedroom
Wall
4"
(0.1m)
Max.
12"
(0.3m)
Max.
Testing Your Smoke Detector
Test the detector for minimum sensitivity by activating the test feature.
To test the unit, hold the test magnet against the case as shown. The
Alarm Indicator Light will come ON, the Auxiliary Relay (if equipped) will
be activated, and the alarm control panel should indicate a fire alarm.
When the magnet is removed, the Alarm Light and Auxiliary Relay will
remain ON. Turn off the voltage supply from the control panel to the
detector for two
seconds to reset the
detector to normal.
If the smoke
detector does not
function properly,
call your Smoke
Detector Installer or
Dealer for service.
Smoke Sensitivity
may be measured in
a correlated UL268
or CAN/ULC S529M87 smoke box. DSC will conduct this test for a nominal charge. If a
returned unit is found outside of its marked sensitivity range, DSC will
clean and restore the unit’s sensitivity to its marked range.
Smoke sensitivity of installed detectors can be measured without
removal with the Gemini Model 501 Aerosol Smoke Detector Analyzer.
Follow the instructions supplied with the instrument. Start with the
sensitivity corresponding to the lowest marked detector sensitivity; no
alarm should be indicated. Reset with the highest sensitivity setting;
an alarm should then be indicated. These results indicate that the unit
is within its marked sensitivity range. Other settings can be tried to
bracket the detector’s sensitivity to a narrower sensitivity range, such
as may be important during annual tests to quantify any change over
time.
Owner’s Maintenance Instructions
The Meridian Smoke Detector is designed to require a minimum of
maintenance. If the case becomes dusty, 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 is found to cause 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 a 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 stored safely in closed containers in a
cool, well ventilated area? Cleaning 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.
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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 their
locking mechanisms operate smoothly.
• If opening the exit or using the exit is too difficult for children, the
elderly or handicapped, plans for rescue should be developed.
This 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 winter; 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 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 frequently so that should an
emergency 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 inhouse fire safety inspection.
Installation Instructions
Specifications
Nominal Operating Voltage ......................12 - 24VDC o r VF W R
Maximum Operating Voltage Range .................10 - 30VDC, or
.............................................................................. 10 - 26.4VFWR
Standby Current
@12V @24V
MN220 15µA 50µA
MN220T 25µA 60µA
MN220R 15µA 65µA
MN220RT 30µA 75µA
MN220 Series Compatiblity Identifier:............................. PS220
Compatible Control Units:
DSC PC5010 with compatibility identifier: ....................... PC5-1
Maximum no. of detectors per zone: ..................................... 30
Min. detector voltage/current
to operate relay (MN220R, MN220RT): ................. 7.5VDC/35mA
Auxiliary Relay Rating (Resistive)
Form C Relay...............................................2A at 30VDC / VAC
Temp Sensor.................................................... 57
Smoke Sensitivity.................... 2.0%/ft obscuration ±0.6%/ft (UL)
Operating Environment ....................... 0°C - 50°C (32°F - 100°F)
..................................................5% - 93% RH, non-condensing
o
C (135°F) fixed
Field Test.................................. Magnet-activated switch and/or
...................................... Gemini 501 Smoke Alarm Analyser**
Dimensions
Test Button &
Alarm Indicator
51 mm
2.0"
5.13"
131 mm
Mounting the Unit
The Meridian Smoke
Detector mounts to a
standard 4" octagonal
electrical box.
12 to 24V
or Full Wave Rectified
power must be supplied
from a UL/ULC-listed alarm
control unit. Wiring should
be in accordance with the
appropriate national
electrical code and
applicable local codes.
Remove the mounting plate
from the case by pushing the locking tab and turning the mounting
plate counter-clockwise. Attach the mounting plate to the electrical
box (see diagram above for orientation).
THIS EQUIPMENT SHOULD BE INSTALLED IN ACCORDANCE WITH
THE NATIONAL FIRE PROTECTION ASSOCIATION’S STANDARD
72. (National Fire Protection Association, Batterymarch Park, Quincy,
MA 02269)
Locking Tab
DC
Smoke Detector Mounting Plate
Form C Aux. Relay wires
dress through this opening
THIS SIDE OUT
Powerand Form A Relay wires
dress through this opening
Mounting
Holes
Wiring
Refer to the wiring diagrams on this installation sheet and those
provided in the Installation Manual of the alarm control panel being
used with the unit.
Before connecting the unit, prepare the wires from the electrical box
for connection; the wires should not be frayed or bent.
CAUTION: If the power connections are reversed, the unit will
not operate. The unit is protected against damage from incorrect
wiring.
** Gemini Scientific, 1122B Aster Ave., Sunnyvale, CA 94086 Tel: 408-554-0310
Page 4
When wiring is completed, inspect the wiring and correct any errors
before applying power to the unit. When the wiring has been
thoroughly reviewed, neatly insert the wires into the electrical box
and secure the unit to the mounting plate.
Models: MN220
MN220T
Wiring (bottom view)
2-Wire Detector System Wiring
CAUTION: FOR SYSTEM SUPERVISION, DO NOT USE LOOPED WIRE
UNDER TERMINALS. BREAK WIRE RUN TO PROVIDE
SUPERVISION OF CONNECTIONS.
Models: MN220R
MN220RT
Installation Testing
When all connections are completed, apply power to the system as
described in the control panel’s Installation Manual. If all connections
are correct, there should be no alarm from any of the smoke
detectors. If an alarm occurs, ensure that there is not an actual alarm
condition. If there is no actual alarm, remove power from the system
and check all smoke detectors for correct wiring.
If no alarm occurs, test each smoke detector by holding the test
magnet against the case near the Alarm Indicator. Refer to the
illustration in the “Testing Your Smoke Detector” section of these
instructions. When the magnet is in place, an alarm will be activated:
the Alarm Indicator Light will come ON, the Auxiliary Relay will be
activated,and the alarm control panel will indicate a fire alarm. When
the magnet is removed, the detector will remain latched in the alarm
condition. To reset the detector, remove the power supplied by the
alarm control panel.
Installer’s Maintenance Instructions
Normally, the Meridian Smoke Detector will not require maintenance.
If the unit is mounted in a high dust environment, the inlet areas of the
case may be vacuumed with a soft brush attachment.
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 vacuuming, return the unit to DSC for service.
Contact DSC at the address and number below to obtain a return
authorisation number before returning the unit.
Installer’s Responsibility to the User
It is the Installer’s responsibility to thoroughly instruct the end user of
the system 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 material 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
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 express
or implied and of all other obligations or liabilities on the part of Digital
Security Controls Ltd. This warranty contains the entire warranty.
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.
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.
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.
For Information and Technical Assistance:
Digital Security Controls Ltd.
™
1645 Flint Road
Downsview, Ontario, Canada M3J 2J6
Phone: (416) 665 8460
Fax: (416) 665 7498
29002397 R0
August 1997
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