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Air tightness of the Property. 

This can happen if there is a lack of unobstructed 

ventilation in the presence of double glazing.

Holiday Accommodation.

 Take particular care when using holiday 

accommodation at home or abroad. Make sure you understand the type of 
appliances you are using and take note of the fuel being used. The CO5B and CO7B 
ranges of Carbon Monoxide alarms are particularly suitable for this. Always take the 
handbook with you and read these instructions.

HAVING A WORKING CARBON MONOXIDE ALARM IN YOUR 

PROPERTY SHOULD NOT BE SEEN AS A REASON TO AVOID 

THE REGULAR SERVICING OF FUEL BURNING APPLIANCES.

PRODUCT WARRANTY

 

Firebiltz Ltd guarantees to you, as a purchaser, that the enclosed Carbon Monoxide 
alarm will be free from defects in material, workmanship or design under normal use 
and service for a period of 5 years for the CO5B range and 7 years for the CO7B range.
This Guarantee is not assignable. Our liability to you, under this guarantee is limited to 
repairing or replacing any part which we find to be defective in material, workmanship 
or design, free of charge to the customer, upon sending the alarm with proof of date 
of purchase, postage paid to Fireblitz Ltd, Units 15-17 Manford Industrial Estate, 
Manor Road, Erith, Kent DA8 2AJ.

The terms of this guarantee will not apply in the following 
circumstances:

 If the alarm has been modified, dismantled, contaminated, 

damaged, neglected or otherwise abused or altered following the date of purchase, 
or if it fails to operate due to incorrect siting, installation, or damage caused by failure 
to abide by the instructions supplied. It is specifically drawn to the users attention 
that substantial periods in alarm will shorten alarm life, during which time it will have 
provided valuable protection and no claim under the guarantee will be entertained.
The liability of Fireblitz Ltd, arising from the sale of this alarm or under the terms of 
this guarantee shall not in any case exceed the cost of replacement of the alarm. 
In no case, shall Fireblitz Ltd be liable for consequential loss or damage resulting 
from the failure of the alarm or the breach of this or any other guarantee, express or 
implied or for damage caused by failure to abide by the instructions supplied. This 
guarantee does not affect your statutory rights. 

IMPORTANT: This device is not suitable as a smoke, fire 

or combustible gas detector. It should not be regarded as 

a substitute for the proper servicing of fossil fuel burning 

appliances such as gas, oil, paraffin, bio-fuel, wood, coke, charcoal 

or coal fired boilers, room heaters and cookers etc, or their flues.

Fireblitz Extinguisher Ltd.

 

Units 15-17 Manford Industrial Estate, Manor Road. Erith, Kent DA8 2AJ 

Telephone: 01322 342238 Email: sales@fireblitz.co.uk

FRONT

BACK

WARNING:

 This apparatus is designed to protect individuals from the acute 

effects of carbon monoxide exposure. It will not fully safeguard individuals 
from specific medical conditions. If in doubt consult a medical practitioner.

ALARM DESCRIPTION

The CO5B and CO7B range of alarms will go into the alarm condition under 
the following circumstances: 
 

  Carbon Monoxide Level 

No Alarm 

Alarm 

 

(Parts per million) 

Before Before

 

30 ppm 

120 mins  

-

 

50 ppm 

60 mins 

90 mins

 

100ppm 

10 mins 

40 mins

 

300ppm 

3 mins

PRODUCT DESCRIPTION

 

 
 
The FireHawk CO5B and CO7B range of battery operated Carbon Monoxide 
alarms are ideal for the home and travelling on holiday. It’s compact size takes 
up little room in the baggage but gives you invaluable protection from faulty 
heating and cooking appliances wherever you are.
If fitted, the LCD display on the CO7BD allows you to read harmful levels of 
Carbon Monoxide (CO) in ppm (parts per million) at the click of the display 
button. Further clicks show the peak CO levels in the previous 12 hours and % 
COHb (carboxy-haemoglobin or CO in the blood).
Three LED’s on the front of the alarm indicate Alarm (red) when the alarm has 
detected harmful levels of CO; Power, (green) flashes one every minute when 
the alarm is operating and Fault (yellow) indicates a fault in the alarm. All three 
LEDs operate with different sound patterns as shown in the Table 1.

WHAT TO DO IF THE ALARM SOUNDS

 

 

If the alarm sounds a repeating series of 4 beeps, (see Table 1) evacuate 
the property immediately. If it is not possible for all occupants to exit the 
property for any reason, call for help, open all doors and windows to ventilate 
it and move to fresh air.

IN THE CASE OF SUSPECTED CARBON MONOXIDE (CO) 

POISONING, SEEK MEDICAL ASSISTANCE IMMEDIATELY.

If it is safe to do so, turn off all appliances, shut off the gas supply tap and: 

CALL TRANSCO ON 0800 111 999

Do not silence the alarm or re-enter the property until the source of Carbon 
Monoxide (CO) has been found and dealt with by a competent and registered 
Gas Safe engineer. 
   Carbon Monoxide 

Repeating Series of 4 

••••  ••••  •••• 

 

Present 

beeps with Red LED

 

Alarm Test 

One series of 4 beep with 

•••• 

 

 

green, yellow and red LEDs

 

Low Battery 

One beep every minute 

•      •      •      •

 

Fault 

Two beeps every minute 

••    ••    ••    •• 

 

 

with red and yellow LEDs

 

End of alarm life 

Three beeps every minute 

•••     •••     •••

 

 
 
The alarm will reset itself if the CO dissipates naturally. 

WHERE TO INSTALL YOUR ALARM

The design and layout of domestic premises and the number, type and 
position of carbon monoxide sources vary widely. However, general guidance 
is given below on where and where not to locate the alarm in order to 
minimise the risk of misleading indications.

Which room?

 

Ideally, an alarm should be installed in every room containing a fuel burning 
appliance. Additional alarms may be installed to ensure that adequate warning 
is given for occupants in other rooms, by locating alarms:
a.  in remote rooms in which the occupant(s) spend considerable time whilst 

awake and from which they may not be able hear an alarm from an alarm 
in another part of the premises, 

b.  and every sleeping room. 
However, if there is a fuel burning appliance in more than one room and the 
number of alarms is limited, the following points should be considered when 
deciding where best to put an alarm:
c.  locate an alarm in a room containing a flueless or open-flued appliance, and
d.  locate an alarm in a room where the occupant(s) spend most time.
e.  If the appliance is in a room not normally used (for example a boiler room), 

the alarm should be put just outside the room so that the alarm may be 
heard more easily. If that room is remote, then the guidance in points a. 
and b. above should be considered.

Where in the room?

 

It should be possible to view all the light indicators on the alarm when in the 
vicinity of the chosen location for the alarm. It is not possible to give specific 
guidance on the exact location of a alarm which suits all types of room and 
their usage. The following points should be taken into consideration when 
determining an optimum location for any appropriate situation:

Where not to install the alarm 

The alarm 

SHOULD NOT

 be installed:

•  in an enclosed space (for example In a cupboard or behind a curtain);
•  where it can be obstructed (for example by furniture, books or ornaments);
•  directly above a sink;
•  next to a door or window;
•  next to an extractor fan;
•  next to an air vent or other similar ventilation openings;
•  in an area where the temperature may drop below - 10°C or exceed 40°C, 
•  where dirt and dust may block the sensor;
•  in a damp or humid location;
•  in the immediate vicinity of a cooking appliance.
An alarm located in the same room as a fuel-burning appliance:
•  If the alarm is located on a wall it should be located close to the ceiling 

and at a height greater than the height of any door or window.

•  A ceiling mounted alarm should be at least 300 mm from any wall, and for 

a wall mounted alarm it should be at least 150 mm from the ceiling.

•  The alarm should be at a horizontal distance of between 1 m and 3 m from 

the potential source. If there is a partition in a room, the alarm should be 
located on the same side of the partition as the potential source.

•  Carbon Monoxide alarms in rooms with sloped ceilings should be located 

at the high side of the room.

An alarm located in sleeping rooms and in rooms remote from a 
fuel burning appliance:

 

An alarm that is located in sleeping rooms and in rooms remote from the 
fuel-burning appliance should be located relatively close to the breathing 
zone of the occupants. (The breathing zone should be regarded as the 
horizontal level in the room where a person’s head spends most of the time, 
ie while sat in a chair or laid on a pillow.
Pay particular attention to the normal location of the elderly and disabled 
when reaching a decision. For further information contact the manufacturers 
helpline on 

01322 342 238

 or CoGDEM (The Council for Gas Detection and 

Environmental Monitoring) on their helpline 

0800 1694 457

Particular attention should be given to sleeping accommodation. Carbon 
Monoxide is particularly hazardous to a person while asleep as it will not wake 
them. If they wake and have been subjected to carbon monoxide, they may 
be too disorientated to know what is wrong with them and what to do next. 
A Carbon Monoxide alarm at the bed head will help to avoid this situation 

WARNING:

 Do not operate this alarm in areas with temperatures less 

than -10°C or greater than +40°C; or in humidity less than 30% RH or 
more than 90% RH.

HOW TO INSTALL YOUR ALARM

 

This apparatus should be installed by a competent person.

 

As a portable Device:

1.  Assemble the device as shown in Figs. 1 & 2.  

The alarm will automatically switch on and beep 
4 times with lights and display if fitted. Test the 
alarm using the test button and refer to Table 1. 
To remove the baseplate and turn off the alarm, 
see the end of this section.

2.  Attach the stand as shown in Fig. 3
3.  Place the alarm in your chosen position in free air 

with no local obstructions and close to the front 
edge of shelves and surfaces. See “Where to 
install the alarm” above.

Fixing the alarm to a wall:

1.  Decide on the position for the alarm in open air 

and unobstructed from the guidance given above 
in “Where to install the alarm”.

2.  Using the screws and fixings supplied fix firmly to 

the wall as shown in Fig. 4. 

  Assemble the alarm to the baseplate as shown 

above in Fig 1. The alarm will automatically 
switch on and beep 4 times with lights and 
display if fitted.

3.  Test the alarm using the test button and refer 

to Table 1.

NOTE:

 To Remove the alarm from the baseplate, 

depress the tag fully towards the back of the 
baseplate and slide the alarm towards the top.  
See Fig 5.

  Fig. 1

  Fig. 2

  Fig. 3

  Fig. 4

  Fig. 5

 SLIDE DOWN

Table 1

LCD Display 

(if fitted)

LED Indicators

Test/Display 

Buttons

Sounder

READ AND RETAIN THIS USER MANUAL

MANUAL

BATTERY OPERATED

Carbon Monoxide Alarm

HOW TO MAINTAIN YOUR ALARM

 

WARNING: Tampering with this alarm may cause a malfunction

Testing the alarm 

Test the alarm once a week using the test button. It should flash all three LEDs 
once, one after another, followed by 4 beeps from the sounder.

Cleaning the alarm

 

Regular cleaning of the alarm is essential if it is to work properly. Keep free 
of dust and vacuum it every month and ensure the vents are clear. Every six 
months wipe the outside with a damp cloth to remove staining and grease from 
cooking etc.

Battery Information

 

The battery is sealed in and is not replaceable. It should last 5 years for the 
CO5B and 7 years for the CO7B range; the life of the alarm. After approximately 
5 or 7 years, depending on the model, the alarm will beep three times every 
minute to indicate end of life. At this point the alarm should be replaced.
Extended periods in alarm mode can significantly reduce the life of the battery.

AUTOMATIC FAULT DETECTION

 

In the unlikely event of a fault developing in your alarm, it will emit two beeps 
every minute (see Table 1). If this happens DO NOT OPEN THE ALARM, there are 
no user serviceable parts inside. Remove it from the baseplate to turn it off and 
return it to the manufacturer at the address at the end of this handbook.

WHAT IS CARBON MONOXIDE?

Carbon Monoxide (CO) is an extremely poisonous gas. It is a colourless, 
odourless and tasteless gas released by the incomplete combustion of fossil 
fuels such as natural gas, bottled gas, petrol, diesel, oil, paraffin, wood, coal coke 
and bio-fuels.
When inhaled, it causes chemical asphyxiation, when CO mixes with the blood 
and reduces the oxygen carried around the body, in particular to the brain. The 
following symptoms are typical of CO poisoning and should be discussed with 
all members of your household.

Mild Exposure:

 

Slight headache, nausea, fatigue, often thought to be flue symptoms. Think CO.

Medium Exposure:

 

Severe throbbing headache, drowsiness, confusion, vomiting and fast heart rate.

Extreme Exposure:

 

Unconsciousness, Convulsions, Cardio-respiratory failure, death.
Although feeling unwell, victims of CO poisoning become so disoriented that 
they can no longer decide what to do next, including being unable to exit the 
building or call for assistance. Very young children often show symptoms earlier 
than adults.
Being affected while asleep is the most dangerous situation as the victim will 
not wake as a result.

WHAT ARE THE POTENTIAL 

SOURCES OF CARBON MONOXIDE?

 

 

A correctly operating and serviced fossil fuel burning appliance should allow 
complete burning of the fuel and therefore is not a hazard. You should have 
all such appliances serviced at least once a year by a fully qualified Gas Safe 
registered engineer.

TYPICAL SOURCES OF CARBON MONOXIDE  

AROUND THE AVERAGE HOUSEHOLD ARE:
Room heaters;

 such as real flame fires, wood-burners, ranges; open coal, coke 

and wood fires, portable gas and paraffin heaters. Central heating boilers. Oil 
fired and gas central heating boilers, wood-burners and automated feeders for 
coke and coal.

Cookers and solid fuel ranges.

 

NOTE: Cooker hoods without flues will not remove CO.

Barbecues and chimneas 

used outside but close to the property

Petrol and diesel driven engines

 such as cars, motorbikes, lawn movers, 

strimmers, rotovators, chain saws etc, especially when run up inside the garage 
or garden shed.

Cigarette, cigar and pipe smoke.

 Carbon monoxide from burning tobacco 

can build up over even a short time, particularly in a poorly ventilated property.

Blocked flues from fires, ranges and boilers.

 A partially blocked flue will 

cause a build up of unburned gasses in the system and, if damaged by building 
movement or poor condition, could either severely affect complete burning or 
leak combustion gases into the property, particularly when they take air from 
the room to improve efficiency of exhaust.

TYPICAL CAUSES OF CARBON 

MONOXIDE IN THE HOME ARE

 

 

Incorrect Installation of Equipment

 Always use a registered Gas Safe 

Installation Engineer.

Faulty Equipment;

 Cracked /blocked flues or cracked heat exchangers 

Insufficient Ventilation for Complete Combustion. 

Where appliances 

take air for combustion from the room such as open wood and coal fires, 
portable gas or paraffin heaters or space-heating boilers, the room 

MUST

 have 

adequate ventilation to allow sufficient air for complete combustion.  
DO NOT block up room vents specifically provided for this purpose.

Appliances Competing for Air Supply

 Where there is more than one 

appliance taking air from a room ensure that there is an adequate supply. 
Consult your Gas Safe Engineer

Models: CO5B, CO7B and CO7BD

BS EN 50291-1:2010

License No: KM 573122

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