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3. For best protection, smoke alarms should be installed in every room in your home, apart from
those listed in the 'LOCATIONS TO AVOID' section. Heat alarms should be used in kitchens,
boiler rooms, laundry rooms, garages and such like where smoke alarms would be unsuitable.
All alarms must be interconnected.
4. Install smoke alarms in circulation areas at a distance no greater than 7.5m from the farthest
wall, no greater than 7.5m from a door to any room in which a fire might start, no greater than
7.5m from the next smoke alarm and no greater than 3m from bed.
5. When heat alarms are installed in a room, they should be at a distance no greater than 5.3m
from the farthest wall no greater that 5.3m from a door to any room in which a fire might start
and no greater than 5.3m from the next heat or smoke alarm.
6. As it is Impossible to predict the source of a fire the best location for an alarm is the centre of
the room or hallway. If it is necessary to locate the smoke alarm on a wall always locate the
detection element of the alarm 150mm to 300mm (6 to 12 inches) below the ceiling and the
bottom of the alarm above the level of doors and other openings.
NOTE: Heat alarms should not be wall mounted.
7. In rooms with simple sloped, peaked or gabled ceilings install smoke alarms 900mm (3 feet)
from the highest point of the ceiling. 'Dead air' at the peak of the ceiling may prevent smoke
from reaching the alarm in time to provide an early warning.
8. Closed doors and other obstructions will interfere with the path of smoke and heat to an alarm
and may prevent occupants from hearing an alarm on the other side of a closed door. Install
sufficient alarms to compensate for closed doors and other obstacles.
9. Your local fire brigade or insurance company may be able to give you further advice. Call them
and ask. Further help and information may also be found in BS5839 Part 6 and the Fire Safety
guidance given by the Department of Transport, Local Government and the Regions (DTLR).
CAUTION: Research indicates that substantial increases in warning time can be obtained with
each properly installed additional alarm, It is strongly recommended that the advice above be
followed to ensure maximum protection.
IMPORTANT: These smoke and heat alarms are intended primarily for use in single-family
occupancy private dwellings. For use in other applications the manufacturers advice should be
sought.
LOCATIONS TO AVOID
DO NOT locate alarms: -
1. In turbulent air from fans, heaters, doors, windows, etc.
2. In high humidity areas such as bathrooms and shower rooms or where the temperature
exceeds 39ºC (100ºF) or falls below 5ºC (40ºF)
3. At the peak of an 'A' frame ceiling – dead air at the top may prevent smoke and heat from
reaching the alarm to provide an early warning.
4. Less than 300mm (12 inches) from a wall when mounted on the ceiling.
5. In insect infested areas. Tiny insects may affect performance.
6. (Smoke alarms) in poorly ventilated kitchen or garage. Combustion particles from cooking or
car exhaust could trigger a nuisance alarm
7. In very dusty or dirty areas – dirt and excessive dust can impair the performance of the alarm.
8. Within 300mm (12 inches) of a light fitting or room corners.
9. In locations that would make routine testing or maintenance hazardous. (e.g. over a stairwell).
10. On poorly insulated walls or ceilings.
11. Near objects such as ceiling decorations that might impede the path of smoke or heat to the
alarm.
12. Within 1500mm (5 feet) of a fluorescent light fitting and keep wiring at least 1000mm (39
inches) from these fittings. Do not install alarms on circuits containing fluorescent light
fittings or dimmer switches.
Further help and information may be found in BS5839 Part 6
D: USER INFORMATION
Features
• Operating Lights – A continuous green light indicates the alarm is receiving mains power. The
red light doubles as an alarm source indicator and flashes approximately every 45 seconds to
confirm circuitry integrity.
• Alarm Source Indicator – Red light will flash every second in the unit originating the alarm. Red
lights on other alarms flash every 45 seconds.
• Alarm Pause (670 range only) – Silence your smoke alarm by momentarily pressing the test
button. Ideal when non-emergency smoke (e.g. cooking fumes) cause nuisance alarms. Red
light flashes every ten seconds to remind you that the alarm has been silenced. Double beep
indicates that the alarm has automatically reset after approximately 10 minutes.
• The 370MBX has a separate alarm pause button. The alarm beeps every 45 seconds for 10
minutes when in pause.
Be Prepared
Smoke and heat alarms properly installed and maintained are an essential part of a good home fire
safety programme. Review fire hazards and eliminate dangerous conditions wherever possible.
When fire strikes a prepared and practiced escape plan could prove vital. Your local fire brigade
may be willing to advise you. Call them and ask. Consider and discuss the following safety hints:
• Ensure everyone is familiarized with the alarm signal.
• Always test doors with your hands before flinging them open. If they feel warm, fire may be
walled up behind them – leave closed and find another escape route.
• Don't waste time collecting possessions. Rouse all occupants and leave the building; your life is
more valuable.
• GET OUT, STAY OUT, GET THE FIRE BRIGADE OUT!
• Keep everyone in a set meeting place after your escape.
• If trapped inside, stay close to the floor, cover your mouth with cloth and conserve breath while
you crawl to safety.
• Keep all windows and doors closed except for escape purposes.
• Prepare and practice an escape plan before a fire starts.
Draw a floor plan. Have fire drills often. Practise your escape.
Simple Maintenance
Vacuum every six months to keep unit working efficiently by firstly turning off the mains electricity
supply and vacuuming through the vents using a soft brush attachment. Keep the nozzle from
touching the unit. SWITCH POWER BACK ON WHEN YOU HAVE FINISHED.
Test the alarm once a week by: -
• Checking that the green light is on and that the red light is flashing every 45 seconds or so. The
lights are located behind the grille on the front of the alarm.
• Press and hold the test button until the alarm sounds. NOTE: Pressing this button on alarms in
the 670 series also places the alarm in pause mode.
MBX MODELS.
Change the battery with a new one when the alarm beeps every 45 seconds.
370MBX Models Only.
Turn off the mains electricity supply. Remove the locking pin by inserting a small screwdriver into
the square hole at the top of the battery drawer. Apply pressure at the tip of the screwdriver,
pushing it up onto the locking pin. The pin will pop out.
Open the battery drawer and remove the old battery, insert the new battery contacts first according
to the markings on the inside of the drawer front, close the drawer and test the alarm using the test
button. Refit the locking pin and then turn on the mains electricity supply. NOTE: The battery
drawer cannot be closed if the battery is missing.
All other MBX Models (Excluding 10 year Lithium versions.)
Turn off the mains electricity supply, remove locking key, rotate the alarm approximately 10mm
anti-clockwise and remove the alarm from the ceiling. Unplug the alarm from the mains supply.
Remove the screw and prise open the battery compartment door on the back of the alarm to
replace the battery with one of the following: Duracell MN1604, MX1604, Eveready PP3B PP3S,
6LF22 Gold Peak 1604A, 1604S. Close the battery door refit the screw and re-assemble the alarm
to the ceiling ensuring that the mains plug is securely fitted. Test the alarm using the test button
then turn on the mains electricity supply. PLEASE NOTE: The alarm cannot be fitted to the
baseplate without a battery installed.
650MBX-10, 670MBX-10 and 680MBX-10
A 9 volt lithium battery is fitted to these alarms. Replace with Ultralife U9VL batteries.
650MRL, 670MRL, 680MRL
Rechargeable Lithium batteries provide approximately 6 months back up power supply in the event of
a mains supply failure. The alarm may beep every 45 seconds for a few hours after a mains supply
failure while the batteries re-charge.
650MC, 670MC, 680MC.
High performance capacitors provide a back up power supply for a minimum of 72 hours (4 minutes
of alarm), in the event of a mains supply failure. The alarm may beep every 45 seconds for a few
hours after a mains supply failure while the capacitors re-charge.
Troubleshooting
Problems are indicated by four events: -
1. Alarm does not sound upon pressing the test button
2. Green light does not illuminate when mains power is on.
3. Red operating light remains steadily on, or off (i.e. does not flash every 45 seconds when alarm is
in standby).
4. Alarm emits a beep every 45 seconds when back up power supply should be fully charged.
Try the following: -
1. Inspect the fuse in the power circuit to the alarm
2. Gently vacuum as detailed in 'Simple Maintenance'.
3. For MBX models only, replace the battery.
4. Call a qualified electrician to inspect the house wiring and connections to the alarm.
If these procedures do not eliminate the problem. DO NOT ATTEMPT REPAIRS. In the first instance
contact the manufacturer for further advice.
If the alarm is still within warranty period and terms, return the unit with proof of purchase to the
distributor, indicating the nature of the problem. Units beyond warranty cannot be economically
repaired. For address see the bottom of this page.
False Alarms
Abnormal air conditions may cause the highly sensitive alarm to give a 'false' alarm. DO NOT
DISCONNECT THE ALARM. If no fire is apparent, ventilate the room and/or operate the alarm pause (If
fitted).
WARNING: IF THERE IS ANY QUESTION AS TO THE CAUSE OF AN ALARM, ALWAYS ASSUME THAT
IT IS DUE TO AN ACTUAL FIRE AND FOLLOW YOU FIRE EMERGENCY PLANS. Do not assume the
alarm is a nuisance alarm and activate alarm pause (if fitted).
Dust can have an adverse effect. Vacuum as recommended above.
Do not paint the unit.
Other factors such as nicotine contamination may also adversely affect the alarm.
Radioactive Contents
Ionization type smoke alarms utilise a tiny amount of radioactive material, 0.9 microcuries (30
kilobequerels) of Americium 241, to detect smoke. This material is in the form of a sealed source and
represents no hazard whatsoever to anyone installing or using the smoke alarm. Any stray particles
would be unable to "penetrate the dead layer of skin and thus do not constitute an external hazard".
(Radiation Protection Guidance for Scientists and Physicians). All Dicon ionization smoke alarms have
been rigorously tested by the National Radiological Protection Board to ensure absolute safety.
Disposal of Ionization type Smoke Alarms 370MBX, 670M, 670MC, 670MRL, 670MRB, 670MBX
As a responsible company, Dicon Safety Products is constantly monitoring and updating its systems
and procedures to anticipate changes in safety and environmental legislation worldwide. For instance,
changes in European legislation will soon have an impact on the disposal of some smoke alarms.
For the latest information on the disposal of smoke alarms, please contact our customer helpline on
+44 1452-712459.
Guarantee
Your Dicon Alarm, excluding the battery in MBX models, is warrantied for five years from the date of
purchase against defects in materials and workmanship. Units returned to Dicon with proof of
purchase during this period as a result of such defects will be repaired or replaced at Dicon's option
without charge. This warranty only covers defects in material or workmanship in normal residential
use and does not cover damage resulting from negligent handling, misuse or lack or reasonable care.
YOUR ALARM IS NOT A SUBSTITUTE FOR PROPERTY, DISABILITY OR OTHER INSURANCE OF ANY
KIND. APPROPRIATE COVERAGE IS YOUR RESPONSIBILITY. CONSULT YOUR AGENT.
This warranty does not affect your statutory rights in any way.
In the event of a problem with your alarm or you have any questions concerning its use; care and
service please consult this manual.
If you require any further help or clarification please write to:
Dicon Safety Products (UK) Ltd, PO Box 402, Gloucester. GL2 9YB
or phone our Helpline on: 01452 712459
PLEASE KEEP THIS MANUAL IN A SAFE PLACE
Please note that specifications may be subject to change.