NEXA MSA-866-RF2 Optical Smoke Alarm User Manual

: June 13, 2024
: NEXA

Table of Contents

NEXA MSA-866-RF2 Optical Smoke Alarm
Product Usage Instructions
TECHNICAL DATA
CHARACTERISTICS
LOCATION ON CEILING AND WALL
INSTALLATION
OPERATION
References
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NEXA MSA-866-RF2 Optical Smoke Alarm

Product Information

Model: MSA-866/RF2

Technical Data:

Battery: 3V built-in lithium battery
Battery Time: < 20 mA during alarm
Radio Frequency: 433.92 MHz
Range: Up to 50 m
Max ERP: 10 mW
Alarm Signal: 85 dB (A) at 3 meters
Operating Temperature: Not specified
Ambient Humidity: Not specified
Interconnection: Compatible with GNSP-2236/RF2,MTS-166/RF2, MTS-163/RF2 models

Product Usage Instructions

Positioning the Smoke Alarm:
The smoke alarm should be installed in the location where a fire is most likely to start. Nexa recommends installing smoke alarms in each room and on all floors.
Single-level home: Install the alarm in the entrance hall between the living areas (including the kitchen) and the sleeping areas. Position it as close as possible to the living areas and ensure it can be heard in the bedrooms. Refer to Figure 1 for an example.
Multi-storey home: Install one alarm in the stairwell at ground level, another alarm above the landing on the top floor, and an alarm on the ceiling in the basement at the foot of the stairs.
This covers the basement level but not crawl spaces and unfurnished attics. Refer to Figure 2 for an example.
Ceiling Installation:

For optimal detection, install the smoke alarm in a central location on the ceiling. Avoid areas with limited air circulation, such as corners, and keep it away from objects that may hinder airflow. Position the device at least 30 cm away from light fittings or interior fittings that may block smoke/heat from reaching the detector. Maintain a minimum distance of 1 meter from the wall. Refer to Figure 3A for guidance.

Wall Mounting:
If ceiling mounting is not possible, mount the device on the wall. Avoid installing it too far into a corner. Position the upper edge of the smoke alarm at least 15 cm and no more than 30 cm away from the ceiling. Refer to Figure 3A for guidance.

Model: MSA-866/RF2

OPTICAL SMOKE ALARM with built-in battery and wireless self-learning interconnection

This instruction folder contains important information on correct installation and maintenance of your smoke alarm. Read through the whole folder before installing it, and keep the folder for future reference.
The Nexa MSA-866/RF2 is designed to detect smoke particles and give an early warning if a fire should start (assuming correct placing and maintenance).

TECHNICAL DATA

Battery 3V built-in lithium battery
Battery time Up to 10 years
Power consumption < 20 mA on alarm
Radio frequency 433.92 MHz
Range up to 50 m
Max ERP 10 mW
Alarm signal 85 dB (A) at 3 metres
Operating temperature 0°C – 40°C
Ambient humidity 10 – 90% RH
Interconnection Radio – max 12 units
Compatible models GNSP-2236/RF2, MTS-166/RF2,MTS-163/RF2
Sensitivity, smoke 0.65 – 1.52% per 0.3 m obscuration

CHARACTERISTICS

Optical sensor to detect smouldering fires
LED indication for Alarm and Voltage
Test button for operation and alarm
Silent Function / Pause Button
Warning for low battery level
Wireless connection by radio link
85 dB alarm signal
Dust cover included

IMPORTANT

The radio range may vary depending on the location, the design of the building and the materials used in the building.
Do not remove or disconnect the batteries to stop false alarms as this will disable the vital function of the smoke alarm. Open windows or ventilate the air around the smoke alarm in order to stop it, and/or press the pause button.
The smoke alarm is intended for use for use in singlefamily homes. In multiple-occupancy buildings, each home must be equipped with its own smoke alarms.
This smoke alarm is not suitable for use in buildings that are not used for residential purposes. The smoke alarm is no substitute for a full alarm system that is required by law or by the fire authorities.
The smoke alarm detects combustion particles in the air (smoke). It does not react to flames or gas.
The smoke alarm is designed to emit an alarm signal if a fire is developing.
The smoke alarm should be tested every week and replaced every ten years.

POSITIONING THE SMOKE ALARM
For the smoke alarm to provide an early warning, it has to be installed in the location where the fire starts. Therefore,
Nexa recommends that you install smoke alarms in each room and on all floors.
Single-level home: To achieve minimum protection, position the alarm in the entrance hall between the living areas (including the kitchen) and the sleeping areas.

Position it as close as possible to the living areas, and make sure the alarm can be heard by anyone in the bedrooms. See Figure 1, for example:
Multi-storey home: To achieve minimum protection,position and alarm in the stairwell (at ground level) and another alarm above the landing on the top floor, as well as an alarm on the ceiling in the basement at the foot of the stairs. This covers the basement level, but not crawl spaces and unfurnished attics.
See the example in Figure 2.

Ceiling installation
Hot smoke rises and spreads, so installing your smoke alarm in a central location on the ceiling is recommended. Avoid areas where air does not circulate, e.g. corners. Also keep it away from objects that may prevent the free flow of air.
Position the device at least 30 cm from light fittings or interior fittings that may prevent smoke/heat reaching the detector.
Position it at least 1 metre away from the wall. See Figure 3A.

Wall mounting, if ceiling mounting is not possible Avoid installing the device a long way into a corner.
Position the upper edge of the smoke alarm at least 15 cm and no more than 30 cm away from the ceiling. See Figure 3A.

Sloping ceilings
In the case of sloping surfaces or ceilings that move up towards a ridge, the detector must be installed 90 cm from the highest point, measured horizontally, because still air under the ridge may prevent smoke reaching the device.

See Figure 3B.
Note: There must be an alarm in every room (except the kitchen, bathroom and garage) to provide recommended/maximum protection. DO NOT POSITION AN ALARM IN THE KITCHEN or BATHROOM as cooking smells or steam may activate the alarm. DO NOT POSITION AN ALARM IN THE GARAGE as there is a risk of it being triggered by exhaust fumes.

LOCATION ON CEILING AND WALL

INSTALLATION

Test and programme the smoke alarm – see the sections TESTING and PROGRAMMING.
Install the mounting plate in a selected location on the ceiling. Take care when positioning your smoke alarm.
Place the smoke alarm on the mounting plate and rotate the smoke alarm clockwise until it clicks into place.
Press the test button to check that smoke alarm is working correctly.

TESTING

Test your alarms both before and after installation so as to be sure that they are working.
Only test your alarms using the test button. Never use a naked flame as this may destroy the smoke alarm.
Get into the habit of testing your smoke alarms once a week.

TESTING THE SMOKE ALARM

PRESS and hold down the test button for 3 seconds, release
The smoke alarm emits an alarm signal and the red LED flashes rapidly.

PROGRAMMING
MSA-866/RF2 is equipped with transmitters and receivers allowing them to communicate wirelessly with each another and with MTS-166/RF2, MTS-163/RF2 and GNSP-2236/RF2 devices. For this to work, the smoke alarms must be linked together through simple programming.
Select one of the alarms to be your master device and mark it with an M on the back so you can recognise it later on. When programming, the master device transmits a radio code to the other alarms so they link together.

Fit the smoke alarm’s mounting plate temporarily and turn it counterclockwise to activate the battery in the smoke alarms that are to be linked.
Hold down the test button on the master device for 11 seconds, the LED indicator shines steadily. The master device is now in programming mode for about 30 seconds before returning to normal mode.
Press and hold the test button in for 2 seconds on the slave unit, when the LED indicator flashes red twice, the connection is completed.

TESTING THE INTERCONNECTION

PRESS and hold down the test button on the master unit for 5 seconds, and then release it.
The alarm on the master unit will sound first, and then the alarms on the slave units will sound (may take up to 60 seconds after the alarm on the master unit has sounded).
Finish the test by pressing the button on the master unit twice in succession.

DELETING PROGRAMMING (resetting)

PRESS – RELEASE 5 times on the test button on the device you want to reset.
Red LED indication flashes to confirm deletion.

OPERATION

Red LED flashes once a minute, indicating that the battery’s status is OK.
On alarm, the device emits a loud pulsating signal and the red LED flashes rapidly.
On low battery level, the smoke alarm emits a short signal once a minute.
Interlinked smoke alarms emit an acoustic signal once an hour if any of the devices has a flat battery that needs replacing.

PAUSE FUNCTION
The smoke alarm has a combined button for the test and pause functions. You can use the pause function to stop the alarm signal if the alarm is triggered due to a false alarm. The pause function is activated by holding down the test/pause button for 1 second while the device is emitting an alarm.
The alarm will stop for 10 minutes and, during the period, the red LED flashes every 10 seconds. The smoke alarm is reset to normal sensitivity after the end of the 10-minute pause period.
If necessary, press the pause button again to pause the alarm again.

SILENT FUNCTION
Silence function means when the alarm is low battery or fault alarm, end-user can silence the alarm for 10 hours by pressing the test button for 2-3 seconds. So, if this happens at night, the end-user can silence the alarm and wait until morning to change the battery.

LOW BATTERY LEVEL
If the smoke alarm sounds with a short beep once every 40 seconds, the battery is running flat and should be replaced immediately. This warning of low voltage is produced for at least 30 days.
Note: The battery is sealed and cannot be changed. The entire smoke alarm must be replaced.

COMMON CAUSES AND HOW TO AVOID FALSE ALARMS
Smoke alarms detect and react to smoke particles in the air. These smoke particles are what cause the smoke alarm to sound. This function means that the smoke alarm may also react to dust particles, moisture or other particles in the form of pollen, insects, etc. These factors frequently cause false alarms.

SMOKE ALARM WARRANTY
This smoke alarm has a ten year limited warranty against manufacturing faults. (Valid from the date of purchase.) The warranty liability is limited to the value of a corresponding smoke alarm. Defective smoke alarms must be returned to the dealer together with a description of the problem. Compensation of a new smoke alarm of the same or an equivalent type will be given in the event of an approved complaint. A receipt confirming the date of purchase must be shown when submitting a complaint.

MAINTENANCE AND CLEANING
The smoke alarm should be cleaned regularly, and at least twice a year. Clean your smoke alarm by vacuuming externally along the opening to the optical chamber to remove any dust or dirt.
IMPORTANT: Do not try to open the smoke alarm to clean inside as this will invalidate your warranty.

RECYCLING

The device mainly comprises materials that can be recycled.
Do not dispose of the packaging, device and packaging contents with household waste without following applicable provisions.
This product must be recycled according to EU Directive 2002/96/EC on waste from electrical and electronic equipment (WEEE).
For more information, phone your dealer or the local authority responsible for waste disposal.

FAULT SOURCE

Steam and moisture. A false alarm may be triggered if the smoke alarm is positioned to close to a bathroom, laundry room or other areas where ambient humidity is high.
Dust and dirt. The smoke alarm will attract a certain amount of dust and pollen particles as the air passes freely through the detection chamber. This may lead to false alarms. The smoke alarm may also become more sensitive on account of this, which may result in unwanted alarms.
Draughts, dust and air ﬂows. False alarms may be caused if the smoke alarm is placed too close to doors, windows, ventilation systems, fans, air ducts, heat pumps and suchlike. This may cause dust particles to fly up and into the detection chamber.
Temperature variations may cause condensation in the detection chamber – if the smoke alarm is placed in a room where windows are opened for ventilation in winter, for example, or close to exits, balcony doors or other locations where conditions switch between hot and cold.
Adverse location. Positioning the smoke alarm incorrectly in an unstable indoor environment may lead to false alarms due to draughts, close proximity to electrical devices (EMC) and lighting.

REMEDY

Position the smoke alarm at least 2 metres away from the bathroom, laundry room or other locations where ambient humidity may be high.
Vacuum the smoke alarm regularly, use a plastic nozzle so as not to damage the electronics. Avoid installing smoke alarms in locations where there is a lot of dust and dirt. Ideally, place a “hood” over the smoke alarm or remove it entirely while you are carrying out renovations at home.
Do not install smoke alarms in draughty locations or close to windows or doors, ventilation, fans, air ducts, heat pumps and suchlike. Find a better location for your smoke alarm, further away from draughts and air flows.
Avoid installing smoke alarms in rooms where the temperature changes rapidly or close to windows or doors that are opened and closed frequently. Move the smoke alarm to a location where the temperature is more consistent and stable.
Position smoke alarms at least 5 metres away from fireplaces, stoves or other heaters. 2 metres away from ventilation ducts, heat pumps and air conditioning.
1 metre away from lamps and fluorescent tubes.

2797-CPR-632447
NEXA20190005
EN14604:2005/AC:2008
Brandvarnare fr hush llsbruk

Manufacturer:
Nexa Trading AB, Sweden
The Declaration of Performance
(DoP) can be found on our website – www.nexa.se