(68.52)
X
A Guide to
Residential Fire Detection
With Reference to BS 5839: Pt.6: 2004
Ahead on Quality
Ahead on Performance
Ahead on Features
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recommendations of BS 5839: Pt.6
more clearly understood, and to offer
advice on how to design, install and
maintain a system that meets the
requirements, with reference to the
2004 amendments.
In September 2004, the Code of
Practice was extensively revised and
updated by the publication of
BS 5839: Pt.6: 2004 and immediately
superseded BS 5839: Pt.6: 1995, which
is now withdrawn. The changes
therein are important and need to be
fully understood and appreciated by
all those with responsibility for fire
safety in domestic dwellings.
INTRODUCTION
When first introduced in 1995, the BS
5839: Pt.6 Code of Practice became the
most important set of recommendations
ever made on fire safety in the home.
At the same time, this guide is
It had an immediate impact on
architects, system designers, installers and
landlords in the private or public sector, all
of whom were required to familiarise
themselves with these important
recommendations. Landlords in particular
needed to abide by these
recommendations, as legal liability with
regard to ‘duty of care’ would
undoubtedly become a serious issue
should a fire occur in an inadequately
protected property.
designed to help answer the most
commonly asked questions about fire
detection; for example,‘which types
of detector to use and where not to
use them’, and to help dispel the myth
that alarms are all the same. They are
not, as the Code itself is all too anxious
to point out.
This document is intended as a guide
to BS 5839: Pt.6: 2004, highlighting the
changes that have come into effect
with the introduction of the 2004
edition while still remaining a
comprehensive guide to BS 5839 as
a whole.
This latest edition of the Guide has
been produced to take on board
new developments since the
introduction of the Code, both in
terms of fire statistics and evolving
fire safety technology.
This guide is not intended as a
substitute for reading the Code of
practice itself. Instead, it’s designed
to help make the implications and
In short, BS 5839: Pt.6 became the
essential guide to providing adequate
fire protection in all dwelling types.
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3
FIRE SAFETY - THE STATISTICS
BATTERY POWERED ALARMS
Further evidence of the vital importance of
smoke alarms comes from American
studies. In American States where
residential fire protection is mandatory,
some 92% of homes have the required fire
alarm systems. 50% of ALL the fire deaths
which occur happen within the 8% where
no alarms are fitted.
According to the latest UK figures the
majority - over three quarters - of all fire
casualties occur in the home.
The high failure rate of alarms with
replaceable batteries is truly frightening.
Landlords relying on battery powered alarms
to protect tenants cannot be there all the
time to check that batteries are present and
working – but responsibility still lies with them.
Until the introduction of BS 5839: Pt.6,
business and commercial premises were
the subject of far more stringent fire
safety regulations than residential
dwellings. BS 5839: Pt.6 was introduced
to start redressing the balance.
Essentially, the time when a smoke alarm
with a replaceable battery was considered
adequate has long passed. BS 5839: Pt.6
itself recognises that, while they save lives,
they are all too vulnerable to tampering to
offer landlords much of a defence under
‘duty of care’. It is no surprise to learn that,
when one Council made an inspection of its
properties fitted with battery units, it found
that in excess of 50% of them were
BS 5839: Pt.6: 2004 itself says:
“It has been estimated that, in dwellings
without smoke detectors, a substantial
proportion of the fatalities from fire could be
avoided if smoke detectors were installed”
Every year around 450 people die in fires
in this country, and close to 13,000 are
injured. The death toll is reducing and
this is acknowledged to be directly
related to increasing and more
professional use of smoke alarms. At the
time of the introduction of BS 5839 in
1995, we were talking around 600 deaths
and 15,000 annual injuries.
SMOKE ALARM
PERFORMANCE
In 34,450 fires in 2003, no smoke alarm
was present in the fire area. 261 people
died in these fires, and a further 6,100
were injured.
‘defective’ in some way, due mainly to
neglect or from removal of the batteries.
COVERAGE
A brief look at ‘Fire Statistics United
Kingdom, 2003’, published by the Office
of the Deputy Prime Minister in March
2005, provides an invaluable insight into
incidents of dwelling fires and the
effectiveness of smoke alarms.
In the cases where an alarm was present,
the alarm operated correctly in 18,821
cases (29% of dwelling fires), operated but
failed to raise the alarm in 3,100 cases
(5%) and failed to operate altogether in
7,445 cases (12%).
Inadequately or improperly installed fire
alarms can have a significant bearing on
their performance, as borne out by the
Fire Statistics.
A badly installed alarm may have its
reaction time cut in half - offering
• In 2003, dwelling fires fell to 63,800. The
number of accidental dwelling fires also
fell to 50,000 – the lowest figures for more
than a decade
• However, around 80% of all fire-related
casualties occur in dwellings
SMOKE ALARM RELIABILITY
occupants as little as 90 seconds or two
minutes to get out. By this time, routes of
escape may have become impassable,
forcing people to jump from high windows.
Or flames may have reached them.
It is worth quoting the Fire Statistics in detail
here. The report notes that, in those
dwellings subject to a fire in 2003, alarms
failed to operate in 12% of cases:
• In 2003, 447 people lost their lives in
fires in the home. (That compares with
430 in 2002 and 483 in 2001)
• 12,600 people were injured, a
reduction of 7% compared with 2002
“However, this overall figure masks a wide
difference in performance between battery
powered alarms and mains powered alarms
– 40% of all battery powered smoke alarms
failed in 2003 compared to just 13% of mains
powered alarms.”
An incorrectly installed fire alarm may
again leave landlords in both the private
and public sector vulnerable to
compensation claims from injured
tenants or from families of victims.
MORTALITY STATISTICS
After one such fire tragedy in which a
tenant died, one local authority found that
the compensation it had to pay out, plus
the cost of litigation, far exceeded the cost
of installing quality fire alarms in every
single council property in their area. To a
private landlord without the resources of a
local authority, such a compensation pay
out could have been completely ruinous.
The Report goes on to clarify:
• In 2003, 68 people lost their lives in fires in
homes where an alarm was present,
operated and raised the alarm
“The main reason for smoke alarm failures
each year is missing or flat batteries. In 2003
they accounted for 63% of failures in battery
powered alarms. The main reason for failure
of mains powered alarms was that the fire
products did not reach the detectors (43% of
cases)”.
• In comparison, in the same period, 379
people died in homes where either an
alarm was not installed or an alarm was
present but failed to raise the alarm
The message is still all too clear: it’s vital to
select, properly install and adequately
maintain the best, most reliable smoke
alarms possible - and to have both
adequate back-up and measures for
preventing tampering with alarms.
The report suggests that 76% of households
now have alarms, so the huge difference in
death rates is strongly indicative not only of
the need for smoke alarms, but also smoke
alarms which work when they are needed.
The message of BS 5839: Pt.6 is therefore
to not only install an adequate number of
smoke alarms, but to ensure that they are
installed and maintained correctly in
every respect.
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4
• Heat alarms should be fitted in
the kitchen and possibly the
principal habitable room. The
definition of a principal habitable
room is ‘habitable room that is
normally the most frequently used
room for daytime living purposes’.
This would normally be the living
or dining room
THE ESSENTIAL CHANGES TO
BS 5839: Pt.6: 2004 – AT A
GLANCE
panel is required and security systems are
put forward as a possible means of
meeting this requirement.
THE DOCUMENT ITSELF
Grades D, E and F now include heat
alarms.
Each clause of the document is now split
into 2 parts. Firstly, there is the
FIRE RISK ASSESSMENT
commentary – in italics – this sets out the
reasoning behind what at first sight may
appear to be arbitrary recommendations.
The recommendations are in normal type,
so it is quite possible to simply refer to
these alone. The intention is to make the
document easier to use; whether it
succeeds in this aim is a matter of
personal perception.
Fire Risk Assessment receives brief
coverage at the start, with much greater
emphasis given to the subject in Annex A
at the back of the document.
CHANGES TO GRADES
There is essentially no change to
Grade F, although a five year
minimum battery life is
recommended in tenanted
properties, along with a
recommendation that the battery
can only be removable by the use
of a special tool. A slot headed
screwdriver is not considered as
meeting this requirement as many
articles can be used as an
alternative.
It is worth noting the Commentary of
Section 4.1: “It is considered that the level
of fire risk in dwellings covered by this part
of BS 5839 is unlikely ever to be sufficiently
low to obviate the need for some form of
fire detection and fire alarm system”.
NEW BUILD PROPERTIES
There are now extended
recommendations with regard to new
build properties. Essentially these are:
• All properties must have mains
powered alarms with a back-up
supply – Grade D system
LEVEL OF COVERAGE
LD1, LD2 and LD3 remain unchanged.
Grade C systems now require a central
control, rather than a level of control as
previously. This implies that some form of
However, the terminology has changed.
The Code now refers to ‘Category’ of
system instead of ‘Type’ of system.
• Smoke alarms should be positioned
in escape routes
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5
OTHER ALARM TYPES
SYSTEM VARIATIONS
alarms, it called for a single final circuit. This
potential confusion has been resolved.
For the first time, BS 5839: Pt.6 now covers
CO fire alarms and multi-sensor alarms.
Where a modification to a system is
made, the standard now refers to it as a
‘Variation’ rather than a ‘Deviation’, as
the latter term implied that the system
was in some way inferior. Note that, in
cases where a variation from the
recommendations is proposed, the
system certificate has to be signed and
agreed by all parties.
Now, because of the introduction of new
‘wireless’ or ‘radio’ interconnect systems,
Clause 15.5 paragraph b says: “If smoke
alarms and heat alarms are of a type
that can be interconnected by wiring, all
smoke and heat alarms should be
connected on a single final circuit”. This
is clearly intended for hard wired
Heat alarms are given far more
importance, as you will have noted
from the New Build changes above, for
example. Heat Alarms should always
comply with BS 5446: Pt.2.
FALSE ALARM CONTROL
systems, as a note added to this
recommendation states: ‘This
RF INTERCONNECTION –
WIRELESS SYSTEMS
A detailed commentary is given on false
alarm control, which should be studied
as this is probably the major reason that
smoke alarms are disabled by the user.
Among its recommendations are:
recommendation does not apply if the
form of interconnection is not capable
of conducting current, e.g. if the means
of interconnection comprises radio
communication rather than wiring.’
Although the previous version of the
document didn’t preclude the use of RF
as a form of interconnecting smoke
• Not using ionisation type alarms in
escape routes
• The use of heat alarms where nuisance
alarms could be a problem – only in
areas other than escape routes
• A high level of maintenance to
reduce the incidence of false alarms
• No automatic connection to the Fire
Brigade, because of the high level of
false alarms generated in the home
ALARMS FOR THE DEAF
AND HARD OF HEARING
BS 5839: Pt.6 now has specific
recommendations to make on the use of
specialist alarms for the deaf or hearing
impaired. Strobes and vibrating pads are
discussed, as are signalling requirements
in daytime rooms. Specific reference is
made to the BS 5446: Pt.3 standard.
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6
BS 5839: Pt.6 - AN
INTRODUCTION
The new 2004 Code further takes into
consideration “changes in technology,
custom and practice, and changes in
guidance that supports national building
regulations” since 1995.
domestic fires have increased by 24% in
just one year. This has clear financial
implications for the landlord. Good fire
safety practice and adherence to the
Code can give the best possible early
warning of fire and so reduce the financial
impact as well as human suffering.
BS 5839: Pt.6 is not intended for
householders themselves, but to
provide guidance and
recommendations for architects and
other building professionals, enforcing
authorities, contractors and others
responsible for implementing fire
precautions in buildings.
BS 5839: Pt.6 also covers almost every
conceivable type of premises,
including:
SYSTEMS
Bungalows
Multi-storey houses
Individual flats
BS 5839: Pt.6 defines a fire detection and
alarm system as "a system that
Individual maisonettes
Mobile homes
Individual sheltered
accommodation
Houses in multiple occupation (HMOs)
NHS housing in the community
comprises a means for automatically
detecting one of the characteristic
phenomena of fire and a means for
providing a warning to occupants". This
means that it could simply comprise one
smoke alarm or, at the other extreme, a
full commercial panel system.
Both new and existing dwellings are
covered.
Firstly, it is worth quoting the
recommendations in Clause 4.2 of the
Code:
“A fire detection and fire alarm system
complying with this part of BS 5839, should
be installed in all dwellings.. whether new
or existing”.
Communal parts of flats, maisonettes,
sheltered accommodation and
hostels are not included; neither are
caravans.
The Code of Practice should not be
quoted as if it was a specification and
the standard itself warns that
particular care should be taken to
ensure that claims of compliance are
not misleading.
BS 5839: Pt.6 is primarily concerned with
saving lives and reducing injuries.
However, it does contain within it
“Final design.. should, where reasonably
practicable, be based on a form of fire
risk assessment..”
recommendations for helping to reduce
property damage too. The 2002/3 British
Crime Survey, issued by the Office of the
Deputy Prime Minister, notes that the
mean cost of financial damage caused
by a domestic fire is now estimated to be
£980 – up a very significant £230 from the
£750 estimated in 2001/2. Gross losses to
It is also pointed out that compliance
with a British Standard cannot
The effectiveness of a system is now
based upon the probability of system
operation (incorporating reliability,
monitoring and maintenance issues) and
the ‘success rate’ of the system (the
number of alarms, their location, audibility
issues and the lifestyle of occupants).
automatically confer legal immunity.
However, for a landlord or installer,
compliance with the latest Code is
obviously the best line of defence in
any claim made against them.
THE SCOPE OF BS 5839:
Pt.6
This Code of practice covers every type
of fire detection ‘system’, from a simple
self-contained battery smoke alarm right
through to major hard wired 24V systems.
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7
On the other hand, a low fire risk may
not justify the cost, complexity and
extent of such a system.
The Code recommends that fire risk be
assessed by taking into account a
number of different factors. These are
now to be found in Annex A of the
2004 Code.
SYSTEM DESIGN - FIRE RISK
ASSESSMENT
How can a system be designed to
meet the latest standards?
For example, the single occupant of a
small bungalow might be adequately
protected by the installation of one
mains powered smoke alarm, whereas
the risk to which families in a six storey
house in multiple occupation are
exposed would warrant much greater
expenditure on a more complex and
comprehensive system.
Firstly, it recommends that each room in a
dwelling be assessed for its own particular
fire risk, taking into account current
statistical information. How likely is it that
a fire will start in a living room, for
example? Or a bedroom? What are the
possible sources of ignition in that room?
Statistically, what are the chances of
injury or death to an occupant if a fire
does break out in that type of room?
The Code recommends that a system is
designed – where reasonably
practicable - based on a fire risk
assessment of the property.
This needs to take into account:
• The probability of fire
• Ignition sources
• Possible fire prevention methods
• The lifestyle of the occupants
• The probability and extent of harm
• Means of escape
This sort of common sense approach
permeates the Code and this, coupled
with its acknowledgement of economic
constraints, makes the Code particularly
simple to adhere to.
ASSESSING FIRE RISK
The Code discusses the generally
• Number of storeys in the dwelling
• Flammable materials (e.g. smoking)
• The age, physical condition and socio-
economic nature of the occupant
The design of the system - which
relevant factors in carrying out a fire risk
assessment to determine the most
appropriate design of fire detection and
fire alarm system. However, it also notes
that the lifestyle of the occupants may
require a change to the assessment.
includes considerations such as the
number of and siting of alarms, and the
form of power supply required should
take the following factors into account:
Fire risk then is essentially a combination
of the probability of fire occurring and the
magnitude of the consequences of fire.
1. The probability of fire occurring
2. The probability of injury or death of
occupants if fire occurs
3. The probability of the system operating
correctly at the time of a fire
4. The probability of early detection
and warning to occupants in the
event of fire
The Code looks at where fatal fires
typically break out and where occupants
may be at the time.
In this way, the Code is recognising that
you don’t have to buy the most
expensive fire detection system available.
You must, however, ensure that the system
is adequate for the risks involved.
First and foremost, it notes that the
greatest impediment to escape in the
event of a fire is smoke obscuring the
escape route. Any fire which starts in a
circulation area - or spreads to a
circulation area - needs to be detected
as soon as possible. The Code says that
“smoke detectors need to be installed in
the circulation areas of all dwellings”.
A high fire risk demands high reliability
to ensure early detection of fire and
warning to occupants, regardless of
where the fire starts, and high
reliability on the part of the system to
operate correctly when required.
Points one and two combined define
the ‘fire risk’, while point three relates to
system reliability. The fourth point is
defined by the standard as ‘a form of
success rate for the system’.
BALANCE BETWEEN FIRE RISK & SYSTEM RELIABILITY & SUCCESS RATE
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8
33% in1995 when the Code was first
published). In most cases, the item
ignited is bedding or furniture. If
FIRE RISK -
Fires caused by electrical appliances
account for some 10% of all household
fires, but result in only 6% of deaths. Electric
WHERE DO FIRES START?
occupants are known to smoke, there is
a greater need to install smoke alarms in
the living room or dining room areas. If
the occupants smoke in bed, the Code
suggests considering installing smoke
alarms in the bedroom itself. Ominously,
statistics reveal that - if such a fire begins
in a room where an occupant is asleep -
their chances of survival are greatly
reduced. By the time an alarm sounds in
an adjacent area, it may very well
already be too late.
Just over half of all fatalities occur in the
room where the fire breaks out; in HMOs,
this rises to 60%. The Code notes that, in
the United Kingdom, some 40% of all
fatal fires start in living rooms or dining
rooms, whereas 30% of fatal fires start in
bedrooms. For this reason, the Code
recommends that if alarms are to be
installed within rooms, the living room
and the dining room should be the first
priority. However, this consideration
could be reversed if the bedroom
presents a particular fire risk, such as the
occupant smoking in bed or using an
electric blanket.
blankets and bed warmers cause 40% of
all the deaths in fires due to faulty electrical
appliances. The Code says that ‘use of
electric blankets, particularly by high risk
groups such as the elderly, increases the
justification for providing smoke alarms in
bedrooms’. As with smoking materials, by
the time an alarm in an adjacent area
detects smoke, it may be too late.
The Code also specifically warns that
occupants – especially those asleep
and/or with a closed door between
them and the alarm - may not hear the
alarm in time. It stresses that it is
‘therefore essential that fire detection
and fire alarm systems are capable of
operating correctly when occupants
are asleep and are capable of rousing
occupants from normal sleep.’ This is
another reason why - if there is a
significant fire risk in a particular room -
consideration should be given to
installing alarms in that room - and
interlinking the entire system.
Finally, the new 2004 Code acknowledges
that there is a very worrying increase in the
incidence of arson, just as it did back in
1995. Malicious ignition is the second most
common source of ignition in all fires in
dwellings. Arson is particularly worrying in
multiple occupancy dwellings and the Code
stresses that the level of fire protection in
such places needs to be very high if there is
a significant risk of malicious fire-raising. It
even goes so far as to suggest installing
alarms near the door in case inflammable
materials are pushed through the letterbox.
Fires caused by space heating
appliances are also particularly life
threatening. After fires caused by
smoking and cooking appliances, these
types of fires account for more deaths
than any other cause - around 12% of
accidental fire deaths. These fires often
occur when something inflammable is
placed too close to the heater. The
Code suggests that, if portable heaters
or solid fuel fires are used at night, there
may be good justification for installing
smoke alarms in the relevant rooms -
particularly bedrooms.
After kitchen fires and electrical
appliances and wiring, smoking
continues to be the next most common
cause of accidental fires in the home.
However, it is the number one cause of
fire deaths. Around 40% of all fire
deaths are caused through matches or
a discarded cigarette (the figure was
WHO IS MOST AT RISK?
The occupants of a property are another
significant factor which needs to be
considered.
MOST COMMON CAUSES OF ACCIDENTAL FIRES
The Code acknowledges that elderly
people are at ‘significantly greater risk’
from fire than other age groups. For those
over 80, the probability of dying in a fire is
several times that for those aged from 30
to 59. Those aged between 60 and 80
are also at increased risk. Children under
five are at greater risk than adults.
For that reason, the Code recommends
greater levels of fire protection in
dwellings occupied by the elderly or
those with young children.
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Interestingly, the Code acknowledges
that people on a low income are
more at risk than other groups, which
is borne out by statistics from the
British Crime Survey. They may not be
able to afford to replace batteries in
smoke alarms and the Code
consequently points out that ‘a more
reliable power supply for the fire
detection and alarm system is
People with impaired mobility require
more time to escape. They need the
earliest possible warning of a fire and
greater alarm coverage. The hearing
impaired also have very particular
needs, and these are dealt with later in
this document.
TYPES OF ALARM
TECHNOLOGY
The next issue raised by the Code is
the types of alarm available.
BATTERY OPERATED
SMOKE ALARMS - GRADE F
It is obvious to any landlord - in the
public or private sector - that those
judged to be most at risk and in need
of a high level of protection are those
who form a typical cross section of
their tenants.
essential’. This worry, coupled with the
fear of alarms being cut off to poorer
residents along with their electricity
supply, permeates the entire
document and needs to be stressed.
PROPERTY PROTECTION
People living in a house in multiple
occupation are between eight and
ten times more likely to die in a fire
than those in single family homes, it
has been estimated. However, the
Code distinguishes between
properties commonly designated as
HMOs. On the one hand, a family
living with a lodger might not be
classed as an HMO as the fire risk may
be no greater than a normal dwelling.
It identifies the greatest risk in houses
converted into bedsits and to elderly
people in sheltered accommodation.
Generally, the risk is also greater if the
property exceeds two storeys in
BS 5839: Pt.6 also adds other
considerations for the protection of
property. However, it stresses that only in
exceptional circumstances, for example
in a house of historical importance
where no-one sleeps, should the
principle objective of a fire detection
system ever be the preservation of
property rather than lives.
BS 5839: Pt.6 acknowledges the
advantages of the single, battery
operated smoke alarm. They’re
simple to install and offer protection
at very low cost. Battery operated
smoke alarms conforming to BS
5446: Pt.1 are recommended.
If property damage is the decisive
factor, the Code recommends
installing a system which results in the
fire brigade being called early enough
to limit property damage.
However, these alarms do have
serious drawbacks. Occupants on
a tight budget may not be able to
afford to replace the batteries. A
significant number of tenants have
also been shown to remove the
batteries to prevent false alarms or
to use in other battery powered
devices and then forget to replace
them. For this reason, the Code
recommends that these alarms
should not be used to protect
tenants in properties of more than
one storey – and even then the
batteries should be sealed-in and
have a life in excess of 5 years.
height. Here the Code recommends
“where the risk in an HMO is relatively
high, it is essential that there is
protection by a highly reliable fire
detection and fire alarm system. It is
also essential that a warning is given
in the event of a fault that impairs the
standard of protection”.
As a fire that starts anywhere will cause
damage, consideration should be given
to providing detectors in some or all
rooms of the building. Coverage in
circulation areas alone is unlikely to be
adequate. Once again, areas with a
statistically greater fire risk, such as
kitchens and boiler rooms, where likely
sources of ignition are present, should
have priority for detectors.
Property damage should, of course,
never be a deciding factor for a
landlord, but it is worth bearing in mind
not only the human cost but also the
financial cost of a fire breaking out in
a property. Insurance premiums may
rise, renovation costs may be
expensive and revenue from the
property will be lost while it is being
made habitable, to say nothing of the
cost of re-housing tenants. Once
again, the cost-effectiveness of a
quality fire alarm system offering the
earliest possible warning is self-evident.
As an aside, landlords have now
been found liable in cases where
tenants themselves have disabled
an alarm. For this reason, it is
unlikely that landlords will be able
to trust tenants to adequately look
after the alarms. The Code
highlights the fact that battery
powered alarms are only suitable
for owner-occupied properties if
the likelihood is that batteries will
be replaced within five days of a
low battery signal.
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electricity bills? Given that many
tenants may have low incomes (in
many local authorities, 70% or
more of all tenants are on
subsidised incomes), they may
well experience periods of
disconnection - and yet the
landlord could well be liable if the
alarm fails to sound because the
tenant has not paid his or her bills!
Unfair or not, as the law stands, it
obviously makes good
commercial sense to ensure that
a reliable, high quality back-up
battery facility is in place.
SYSTEM PLANNING
MAINS POWERED SMOKE
ALARMS - GRADE E
BS 5839: Pt.6 quite reasonably points
out that, no matter how good the
system is, people will only have an
adequate chance of escape if there
are enough detectors installed and if
the alarms can successfully rouse them
from sleep.
The Code states that mains powered
smoke alarms are potentially more
reliable and are recommended to
be installed in existing dwellings
occupied by people who are unlikely
to be able to change a smoke
alarm’s battery.
SILENCING & DISABLEMENT
However, mains powered systems
have their drawbacks; power cuts or
the termination of supply for
whatever reason disables them
totally. They can also be rendered
useless by the tripping of a protective
device, or even - in some cases - by
the fire itself. Householders may also
disable them at the mains all too
easily if false alarms are a problem.
The minimum back-up duration
recommended is 72 hours, and the
Code acknowledges that there
could well be circumstances where
a longer stand-by period is justified
e.g. tenants’ inability to pay their
electricity bill.
MAINS POWERED SMOKE
ALARMS WITH STAND-BY
SUPPLY - GRADE D
FIRE DETECTORS
SUPPLIED WITH
POWER FROM A
COMMON POWER
SUPPLY UNIT
The Code is very aware of the grave
danger posed by tampering with
alarms and their wilful disablement. It
acknowledges that false alarms are a
major reason why householders disable
alarms, and looks at practical steps to
help prevent this. Foremost among
these recommendations is a built-in
method by which alarms can be
silenced without the use of a tool of
any kind, for example a “Hush” or False
Alarm Control button.
The problems outlined above can
be overcome by using alarms that
incorporate, within each alarm, a
stand-by supply such as a primary
or rechargeable battery.
This sort of system should be
considered, says the Code, if the
reliability of the mains supply is not
high, or if the fire risk is likely to be
high during periods of failure or
disconnection of the mains supply
to the dwelling. In new build and
tenanted two storey properties this
type of alarm is now considered
essential.
The Code stresses the role of
specifying “good quality equipment”
in reducing false alarms, and makes
helpful distinctions between alarm
sensor types in reducing sensitivity to
environmental factors liable to cause
false alarms, such as cooking
vapours.
Beyond this, more expensive high
specification systems can offer
connection of all fire detection
devices to a common power supply
via low voltage transformers, or
interlinked fire and security systems.
This begs a simple question of
landlords - can they be sure that
their tenants are paying their
However, the need to avoid false
alarms should never take priority over
the need for early fire detection.
Again, a minimum 72 hour back-up is
recommended by the Code.
The 2004 Code says that the high rate
of false alarms in dwellings makes it
‘generally inappropriate’ to connect
domestic smoke alarms direct to a fire
and rescue service. However, it
acknowledges that vulnerable people
such as the disabled might benefit
from such a connection.
OTHER SYSTEMS
For larger applications, such as
mansions and HMOs, or for areas
with a high risk of fire, higher grade
systems are recommended.
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11
the Code. For example, rather than a
Grade E system landlords might think it
prudent to install a Grade D system
instead. This is especially true
equipment to BS EN 54-2, and power
supply to BS EN 54-4, installed to BS
5839: Pt.1 with some minor
QUALITY & COMPATIBILITY
The quality of equipment installed is a
factor that needs to be carefully
exceptions
considering the many restrictions that
apply to the use of Grade E systems.
• Grade B - Fire detection and alarm
system comprising fire detectors
(other than smoke alarms), fire alarm
sounders and control and indicating
equipment to either BS EN 54-2 (and
power supply to BS EN 54-4), or to
Annex C of BS 5839: Pt.6
• Grade C - System consisting of smoke
detectors and sounders (which may
be smoke alarms) connected to a
common power supply, comprising
normal mains and stand-by supply,
with central control equipment
• Grade D - System incorporating one
or more mains powered smoke alarms
(and heat alarms if required) each
with an integral stand-by supply
• Grade E - System of mains powered
smoke alarms (and heat alarms if
required) with no stand-by supply
• Grade F - System of one or more
battery powered smoke alarms (and
heat alarms if required)
considered. The Code states that, in
general, all components should conform
to relevant British Standards and should
have undergone type testing to those
Standards. Suppliers should preferably
have approval to a recognised quality
approval scheme such as the relevant BS
EN ISO 9000 series standard. If no British
Standards apply, reasonable care should
be taken that components are fit for the
purpose intended.
LEVELS OF PROTECTION
CATEGORIES OF SYSTEM
This was previously referred to as ‘type’
of system. It relates to the level of
protection afforded by the system.
Within the A - F grades defined earlier,
the Code identifies three different
categories of protection:
The Code recommends that all
individual system components should
be mutually compatible.
• LD1 - A system installed throughout
the dwelling, incorporating detectors
in all circulation spaces that form
part of the escape routes from the
dwelling, and in all rooms and areas
in which fire might start, other than
toilets, bathrooms and shower rooms
Conformance to the relevant British
Standard is no guarantee that the
components of a system will be
compatible. Consequently, this should be
confirmed at the design stage.
THE GRADE SYSTEM
• LD2 - A system incorporating
detectors in all circulation spaces
that form part of the escape routes
from the dwelling, and in all rooms or
areas that present a high risk of fire
The changes from the previous edition
are relatively small: Grade A & B now
refer to the latest European Standards
and there are minor changes in
requirements. Grade C now requires
central control of the system. Grades E,
D & F now have reference to heat
alarms in addition to smoke alarms.
Relates to system engineering not level
of protection.
BS 5839: Pt.6 grades fire detection
systems from Grade A down to Grade F.
Generally speaking, the greater the fire
risk and the more demanding the
application, the more comprehensive
the system needs to be.
• LD3 - A system incorporating
detectors in all circulation spaces
that form part of the escape routes
from the dwelling
Concerned by problems with battery
powered units in Grade F, the
Apart from the change of name, there
are no changes to the ‘Categories’
from the previous version of the code.
• Grade A - Fire detection system
prescriptive advice in the Code now
recommends a minimum five year
battery life and batteries that are
secured so that a special tool is
required to remove them for use in
tenanted single storey properties.
incorporating control and indicating
It is noted that an LD3 type system is
intended to protect escape routes for
those not directly involved in the fire
and may not save the life of anyone in
the immediate vicinity of the fire.
As the overwhelming number of
residential applications in the UK will fall
into the D to F categories, this is the
area on which this guide will naturally
focus. If you are particularly interested
in unusual grades of protection, you are
invited to look further at the relevant
clauses of the Code.
The Code also features two grades of
protection for property - PD1 and PD2.
Briefly, PD1 offers comprehensive
coverage of all areas, while a PD2
system includes detectors in only those
areas where there has been judged a
fire risk. Only by quoting Grade and
Category can a meaningful and
effective alarm system be specified,
e.g. Grade D, Category LD2.
Of course, installers and specifiers may
install a system with greater safety
features than laid down in the letter of
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12
and principal living room (smoke
detectors are an acceptable alternative
in the living room).
All dwellings should be covered to at least
an LD3 standard, with the decision being
based primarily on fire risk.
SELECTING THE RIGHT
SYSTEM
How do you choose which grade of
system to install? The Code states that
the grade of system that should be
installed depends “on the nature of the
dwelling, the level of the fire risk and the
characteristics of the occupants.”
Existing Properties
If there is a high risk to occupants from
fire in any part of the building, Category
LD1 or LD2 protection level should be
considered. Those who are infirm or
elderly might particularly benefit from a
higher level of coverage. If people are
likely to be in a room where a fire may
break out, this level of coverage is also
recommended.
Single storey - owner occupied
Grade F, Category LD3
Grade E should be installed if there is
doubt regarding the ability of the
occupier to replace batteries, or Grade
D if the reliability of the mains power
supply is suspect.
Single storey - rented
Grade F, Category LD3
The battery should have an expected
life in excess of 5 years and should only
be accessible by means of a special
tool. Grade E should be installed if there
is doubt regarding the ability of the
occupier to replace batteries, or Grade
D if the reliability of the mains power
supply is suspect.
The Code acknowledges that in
situations where a large number of
properties are involved i.e. the housing
stock of a Local Authority, it is perhaps
not practical to undertake a Fire Risk
Assessment on every one of these
properties. To take account of this a
table listing the ‘Minimum Grade and
Category of fire detection and fire
alarm system for protection of life in
typical dwellings’ – often referred to as
‘Prescriptive Advice’ - is provided. At first
sight this appears to be an easy method
of deciding on the appropriate system
to use in any specific property type.
However, care should be exercised in
applying these recommendations as in
many cases there are notes qualifying
them; this is particularly relevant to
those given for existing properties. If the
notes are overlooked, there is a risk of
applying an incorrect assessment to the
property and as a result specifying what
may be interpreted as an inadequate
system. In view of this, it may be worth
considering applying the ‘New Build’
recommendations to existing properties
to minimise this risk.
2 or 3 storey house or maisonette -
owner occupied
Grade F, Category LD3
It points out that Grade F systems
(battery alarms) are the least reliable
and the system used in new dwellings
should be Grade D (mains powered
with integral back-up supply) or higher.
Existing owner occupied dwellings can
be covered by a Grade F system
provided:
Grade E should be installed if there is
doubt regarding the ability of the
occupier to replace batteries, or Grade
D if the reliability of the mains power
supply is also suspect.
2 or 3 storey house or maisonette -
rented Grade D, Category LD3
Category LD2 if a risk assessment
justifies additional alarms.
• The fire risk is not high
• There is a reasonable certainty that
batteries will be replaced within a
short time, that is, no more than five
days after a low battery signal
Houses in Multiple
Occupation
If these criteria cannot be met, a Grade
E or higher system should be installed.
Existing tenanted dwellings of two or
more storeys should have Grade D
systems installed.
Up to 2 storey - New Build
Grade D, Category LD2
Smoke alarms should be installed in
circulation spaces, heat alarms in
kitchen and principal living room (smoke
alarms are an acceptable alternative in
the living room).
From a landlord’s point of view, the case
for a Grade D system (mains with stand-
by) seems to be quite obvious. Can
they be ‘reasonably certain’ that a
tenant will replace smoke alarm
batteries within five days? Do they have
‘absolutely no worries about their
tenants paying their electricity bills’?
The Code is asking for that level of
assurance.
PRESCRIPTIVE ADVICE
SUMMARY
Up to 2 storey - Existing property
Grade D, Category LD3
Category LD2 if a risk assessment justifies
additional alarms.
All other types
Grade D, Category LD3 in individual
dwelllings. Grade A, Category LD2 in
communal areas.
New Build
Up to 3 storey - owner occupied or rented
Grade D, Category LD2
Smoke alarms should be installed in
circulation spaces, heat alarms in kitchen
and principal living room (smoke alarms are
an acceptable alternative in the living
room).
Over 3 storey - owner occupied or rented
Grade B, Category LD2
Smoke detectors should be installed in
circulation spaces, heat detectors in kitchen
Where fire precautions are subject to
legislative control, the enforcing authority
should be consulted before a decision on
the appropriate Grade and Category of
system is reached.
Once you have decided what Grade of
system to use, you then need to ask
yourself just how comprehensive the
system needs to be, and this is what
governs the LD ‘Category’ system.
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13
CHOOSING WHICH
ALARMS TO USE
BS 5839: Pt.6 also looks in depth at the
different kind of fire alarm sensors on offer.
Sensibly, it points out that there is no single
type of alarm that is most suitable in all
cases and the final choice of which type
of alarm to use will depend on individual
circumstances.
In general, these circumstances are the
desire to afford the earliest possible
warning of a fire and the need to
minimise false alarms.
SINGLE STOREY DWELLING
Optical or Ionisation smoke alarm as best suited for the particular circumstances
Optical smoke alarm
Smoke or heat alarm as best suited for the particular circumstances
Heat alarm
This means, in plain English, that the
most suitable alarm should always be
installed - and not just the cheapest
option. This is a point that landlords
cannot overlook in meeting their ‘duty
of care’ obligations.
Do not install smoke or heat alarms in bathrooms, shower rooms or toilets
The Code also looks at a third type of
alarm - heat. More emphasis is placed
upon the use of heat alarms than
For more information on the different
types of detection technology
available, please see the product
information section towards the back of
this guide.
The Code recommends that optical
smoke alarms should be installed in
circulation spaces, such as hallways
and near kitchens. They should also
be considered in areas where a likely
cause of fire is ignition of furniture or
bedding by a cigarette.
previously. The Code recommends that
they should comply with BS 5446: Pt.2 and
suggests they be used where nuisance
alarms from other sensor types are a
concern. In new build properties heat
alarms are now recommended both in
the kitchen and possibly the principal
habitable room, such as the living room.
CO and Multi-sensor fire alarms are
introduced into the 2004 Code. CO fire
alarms are specifically designed for
detecting carbon monoxide produced
in a fire and can respond quicker than
heat detectors, but are almost always
slower to respond than a smoke alarm.
The type used for detecting CO gas
from faulty appliances etc are
designed to respond at much higher
levels of CO. Consequently, CO alarms
conforming to BS 7860 or BS EN 50291
should not be used as CO fire alarms. It
is not likely that CO fire alarms have a
significant role to play in domestic
dwellings at present.
Ionisation alarms are recommended
more for use in living rooms or dining
rooms, where a fast burning fire may
present a greater danger than a slow
smouldering one, though due
consideration needs to be given to the
potential for false alarms. The new 2004
Code does not recommend the use of
ionisation types in escape routes.
Domestic heat alarms require less
maintenance than any other type of unit
and aren’t prone to false alarms caused
by contamination or smoke caused by
cooking. For this reason, heat alarms were
originally specifically designed for use in
kitchens or garages, where other alarms
are less reliable and more likely to go off
accidentally. Fire deaths from fires
originating in the kitchen are sadly
increasing and such fires can often cause
extensive property damage and,
therefore, landlords might consider them
good insurance. Heat alarms are
generally less sensitive than smoke alarms
and must not be used in circulation areas.
A Multi-sensor alarm is defined in the
standard as a “fire detector that monitors
more than one physical and/or chemical
phenomenon associated with fire”. An
alarm consisting of an optical sensor and
a heat sensor, or one containing an
ionisation sensor and a CO sensor, would
fit this definition. The benefit of this type of
detector is that a broader response to
different fire types can be achieved with,
often, a reduction in false alarm
BS 5839: Pt.6 recommends that heat
alarms have a role to play in Category
LD2 systems.
The Code acknowledges that a mix and
match approach to systems is sensible,
installing different detector types in areas
where they are most effective.
problems. At present there are no
suitable types available for use with
smoke alarm systems.
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14
Positioning of Smoke
Alarms:
There are a number of factors one
has to take into consideration
when positioning and maintaining
a smoke alarm. The design and
occupation of the premises will
obviously be one of the influencing
factors in deciding where to
position the units as well as the
likely types of fire and also the
maintenance required. There are,
however, some general guidelines
that apply to all smoke alarms.
Loft Conversion
Bedroom
Landing
Bedroom
Garage
Living Room Hallway
Kitchen
AVERAGE TWO STOREY HOUSE
Ceiling Mounting:
Hot smoke rises and spreads out so
a central ceiling position is the
preferred location. The air in
corners is “dead” and does not
move, therefore smoke alarms must
be mounted away from corners
and walls. Place the alarm at least
300mm from any light fitting or
decorative object that might
obstruct smoke entering the smoke
alarm.
Optical or ionisation smoke alarm as best suited for the particular circumstances
Optical smoke alarm
Smoke or heat alarm as best suited for the particular circumstances
Heat alarm
Do not install smoke or heat alarms in bathrooms, shower rooms or toilets
SITING OF SMOKE ALARMS
How you position smoke alarms can be
as important as choosing the right type
of alarm to use.
On a Sloping Ceiling:
In areas with sloping or peaked
ceilings install the smoke alarm
900mm from the highest point
measured horizontally, because
“dead” air at the apex may
prevent smoke reaching the unit.
As a minimum, a typical bungalow
would need at least one alarm, a two
storey dwelling two alarms and so
forth.
In all Category LD systems, at least one
smoke alarm should be located
between the sleeping areas and the
most likely source of fire - the living
room and kitchen.
Positioning Heat Alarms:
A heat alarm must be placed on
the ceiling, preferably in the
centre, or close to the likely source
of fire. Air within the corners is
dead and so heat alarms should
be placed away from any corners.
The alarms should be placed at
least 300mm from any light fitting
or decorative object that might
obstruct the heat travelling to the
sensor. Interconnection with smoke
alarms is essential.
In a single storey dwelling with one
alarm, the alarm should be placed as
close as possible to the living
accommodation, but consideration
must be given to audibility in the
bedroom. To achieve audibility of
85dB(A) at the bedroom doorway,
alarms should be sited within 3m of
bedroom doors.
x P
x
x
P x
x
Spacing recommendations say
that, under flat horizontal type
ceilings, the horizontal distance
from any point in the protected
area to the detector nearest to
that point should not exceed 5.3
metres for heat detectors and 7.5
metres for smoke detectors.
In a multi-storey house, at least one
smoke alarm should be located on the
ground floor between the staircase and
any room in which a fire is liable to
start. A smoke alarm should also be
installed on each main landing. In LD2
and LD1 systems, additional alarms
need to be provided.
x
Siting alarms in hallways and landings
Correct ceiling siting position for alarms
P
Do not install alarms here
x
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15
the edges, with the dust cover that should
be supplied with each alarm. Only when
all cleaning is finished should these dust
covers be removed.
In the event of a fire being detected, a
small vibrating pad located beneath the
sleeper’s pillow gently alerts them. At the
same time a powerful strobe light flashes
to provide a further visual warning.
AUDIBILITY
POWER SOURCE
Devices such as these are now
increasingly cited as important
considerations and should be considered
as a matter of course in applications
where the residents are likely to be
elderly, as in a nursing home for example,
or in sheltered accommodation.
The 2004 Code notes that the final system
applied should take into account the
assessed needs of the person being
protected. However, it should always
conform to BS 5446: Pt.3 (Grade A and B
systems aside, where other standards
quoted may be more appropriate).
Audibility is another factor to be
considered. The Code comments that
ideally, an alarm system should be
capable of producing a sound level of
75dB(A) at the bedhead, but that this
is unlikely to be achieved unless there
is a sounder/smoke alarm in the
The normal supply for Grade D and E
systems is the public mains supply. A Grade
D system should be connected either to an
independent circuit at the dwelling’s main
distribution board (with no other electrical
equipment attached except for a
INSTALLATION OF GRADE
D AND E SYSTEMS
bedroom itself. As there is no evidence
of life being lost in single family
dwellings due to the lower sound level
achieved by siting an alarm within 3
metres of the bedroom doors, in many
dwellings this would be acceptable. In
HMOs, where higher levels of ambient
noise is likely, additional
Once these considerations have all
been taken into account and the
system adequately planned, it can then
be installed, tested and commissioned.
dedicated monitoring device) or a
separate, electrically protected, regularly
used local lighting circuit. A Grade E
system may only use the former option.
Systems should be installed in
alarms/sounders may be necessary.
Hard wired interconnected smoke alarms
should be on one final circuit. However, the
2004 version of the code now accepts
that smoke and heat alarms using a radio
signal for the interconnect can be
accordance with BS 7671 (IEE
Regulations 16th Edition) by a qualified
installer. All alarms should be fitted into
place securely and permanently, and
attention given to protecting all wiring
from impact or rodent damage by
recessing or trunking.
A practical way to check audibility is with
the alarm sounding in its intended
location, check that the occupant is able
to hear it in each bedroom with the door
closed above the sound of a radio set to
a reasonably loud conversation level. In
this case, interconnected alarms provide
an ideal solution, a remote alarm picking
up the fire and a sounder being triggered
to wake the occupier.
separately wired from the nearest lighting
circuit with a permanent mains supply.
RADIO LINKED SYSTEMS
If you intend to install the alarms in a new
building, however, it is usually necessary to
wait until all other work on site has been
completed and the building has been
fully cleaned before installing any smoke
alarms. This is because excess dust and
debris from building work can
contaminate the alarms and render them
prone to false alarms. However, new ‘Easi-
fit’ style alarms are a useful exception,
with the wiring able to be completed
during ‘first fix’ and the detector head
simply slotted into place when all
Pages 41-44 of the 2004 Code now set out
the criteria for radio-linked systems. It is
acknowledged now that Grades D-F systems
may use radio interconnection. However, it
warns about the potential drawbacks of
battery powered units being interconnected
in such a way if there is a need to replace
the batteries at regular intervals (by
SPECIAL NEEDS
PROVISION
Back in 1995, the original Code
acknowledged the special needs of
people who are deaf or hearing
impaired and recommended the use of
alternative fire alarm systems to meet
their needs. More attention is paid to the
issue in the new 2004 update.
implication mains powered radio-linked
alarms do not have these drawbacks).
As is typical with the Code, it stresses the
need to ensure that such a system meets
the needs of the application.
cleaning work has been completed.
If, for any reason, other types of alarms
have to be installed before all work is
complete, ensure that they are
A special alarm can be incorporated
into domestic mains fire alarm systems
to protect people with impaired
The new publication also goes out of its
way to recognise that the old Code
completely covered, particularly around
hearing. It’s a simple, yet ingenious idea.
16
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operation, testing, maintenance, false
alarms, escape plans and siting.
• Connect to an independent circuit
at the distribution board if the alarm
does not have a standby supply -
Grade E
• RCD Protection is generally not
required, but if used it should be
dedicated only to the smoke alarm
circuit or be independent of circuits
supplying sockets or portable
equipment
provisions might have previously
technically precluded the use of wireless
systems and overcomes this by pointing
out that issues relating to power supplies,
fault monitoring and integrity and
performance may not be the same for
hard wired and radio linked systems.
TESTING AND MAINTENANCE
Regular routine testing and maintenance
is very important and should be
considered at the design stage.
Special recommendations are also
given to their use in HMOs.
The Code states that the user has a
responsibility for routinely testing the
system and should be supplied with
simple instructions on how to do this.
•
Smoke alarms should not be
installed in new or renovated
buildings until all work is completed
(including floor coverings) and the
building has been fully cleaned,
unless using an Easi-fit style alarm.
Excessive dust and debris from
building work can contaminate the
smoke chambers and cause false
alarms. It will also invalidate the
guarantee. If alarms must be
installed before work is finished,
either use an ‘Easi-fit’ alarm or
ensure that the alarm is completely
covered, particularly around the
edges, with the dust cover that is
supplied with each of our smoke
alarms
WIRING OF MAINS
POWERED SMOKE AND
HEAT ALARMS
All smoke alarm systems should be tested
at least weekly using the integral test
button. Remote test and false alarm
control switches can be used to avoid
the need for the user to reach up to the
alarms. Systems should also be checked
if the occupier has been away or the
power has failed.
When installing, any cable may be
used which is suitable for domestic
mains wiring, provided it is in
accordance with the relevant parts of
BS 7671.
• There is no requirement for fire
resistant cable and the use of red-
sheathed cable is not required
when installing Grade D, E and F
systems
In Grade D to F applications, smoke
alarms should be cleaned periodically in
accordance with manufacturers’
recommendations. Where experience
shows that excessive levels of dust are
compromising the effectiveness of the
system, more frequent cleaning and
servicing may be required.
• 6243Y mains cable is recommended
using the third core for the
interconnect circuit. The earth wire
must not be used for the
interconnect circuit. The maximum
recommended cable run is 250
metres, with 1mm2 or 1.5mm2 cable
Where appropriate, cable penetrations
should be fire-stopped. If there is any
danger of impact damage, abrasion
or rodent attack, appropriate
NEGLIGENCE
protection should be fitted.
The exact question of negligence and
liability falls outside the scope of the
standard. It is up to the courts to judge
these issues.
Amendment No 2 to BS 7671: 2001
allows 'harmonised' cable colours to
be used for installations after 31st
March 2004 (they must be used for
installations commencing after 31st
March 2006). The NICEIC
recommends that 6243Y cable with
the following colours should be used
for smoke alarm systems.
A convenient and reliable alternative
to hard wired interconnection is now
readily available in the form of
RadioLINK from Aico (see page 22).
From some considered opinion covering
the area of legal liability we quote
below extracts from an article written on
behalf of the National Housing and
Town Planning Council (NHTPC) by
Martin Daley, to whom we are grateful
for granting us permission to quote from
his work.
CERTIFICATION AND
PAPERWORK
The installer should certify that the
installation conforms to BS 5839: Pt.6 for
the correct Category and Grade of
system. If any variations have been
agreed to, these should be duly noted.
The Code provides a model certificate
for installers to complete.
Live
- Brown
Neutral
- Grey (oversleeve
blue at terminations)
- Black
Interconnect
According to Daley, the NHTPC has
been fortunate in having sight of
independent research on smoke alarm
liability by Dr Anne Everton. The
following ten situations, based on Dr
Everton’s research, should, says Daley,
‘be avoided at all costs’:
Great care should be exercised in
ensuring correct identification of the
wiring connections as an
interconnected smoke/heat alarm
system will suffer irreparable damage if
the live and neutral connections are
reversed, or if a 240V phase conductor
is connected to the interconnect
terminal.
Suppliers of the equipment should
provide the occupier of the dwelling
with clear and readily understood
information on the system and its use.
All alarms should come complete with
user instructions, designed to be easily
understood, covering such topics as
1
Where the smoke alarm is defective
in design
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17
not circulation areas
2
3
4
Where the smoke alarm is defective in
manufacture
Where the smoke alarm is located
where it cannot operate
When there are not enough smoke
alarms
Where the source of power fails
Where the source of power for the
smoke alarm is removed
When the smoke alarm has been
incorrectly installed
Where the smoke alarm has been
damaged during installation
Where the smoke alarm has been
damaged as a result of malice
It is clear that installing a battery
powered smoke alarm unit and thinking
that it is sufficient to protect the tenant is
an outdated notion. Moreover, even
mains powered systems without a
reliable long term stand-by cannot be
relied upon to provide adequate
protection, as landlords cannot
guarantee that tenants will never have
their power cut off. The implication is
clear that some form of stand-by supply
(Grade D) is therefore required in
tenanted properties.
•
Must be interconnected with smoke
alarms to provide adequate early fire
warning
LOCATION
5
6
• Smoke alarms - within 7.5m of any
door to rooms where a fire is likely to
start, and within 3m of bedroom
doors
• Heat alarms - max 5.3m from any
potential source of fire
7
8
9
LOCATIONS TO AVOID
With BS 5839: Pt.6 now reaching its tenth
birthday, it is well established and
recognised. There is now every reason
to assume that it has significantly more
weight behind it than when it was first
introduced.
10 Where the smoke alarm has been
Do not place a Smoke Alarm in any
of the following areas: bathrooms,
kitchens, shower rooms, garages or
other rooms where the smoke alarm
may be triggered by steam,
condensation, normal smoke, fumes
or excessive dust. Keep the smoke
alarm at least 6m away from sources
of smoke or vapours that may cause
nuisance alarms.
removed from the property
No matter how circumspect the landlord
is, however, there is no cast iron guarantee
that they can fully protect themselves
against all possible liability claims.
RAPID
However, with regards to fire safety, the
most fundamental step they can take
now is to install at least a Grade D mains
powered system. Failure to do so, for
whatever reason, would simply be
indefensible if and when a case came
to court.
REFERENCE GUIDE
Ionisation Smoke Alarms
• Respond quickly to fast flaming fires,
less sensitive to larger smoke particles
• Can be prone to false alarms from
cooking vapours so should not be
located near to kitchens
• Suitable for general use, appropriate
for dining and living rooms and areas
where flaming fires could rapidly
block an escape route
Do not place Heat Alarms in any of
the following areas: bathrooms,
shower rooms or other rooms where
the unit may be triggered by steam
or condensation.
‘Duty of care’ falls squarely upon the
landlord. Dr Ann Everton says that,
increasingly, landlords are under
pressure to install smoke alarms to avoid
the accusation that they are ‘failing to
fulfil their duty of care towards their
tenants’. This is particularly the case for
local authorities who, in enforcing
checks on private landlords, will have to
ask themselves if they too meet the
required standards!
Do not place Smoke or Heat Alarms
in any of the following areas:
• Places where the normal
temperature can exceed 40°C or
fall below 4°C e.g. attics, furnace
rooms etc. Directly above ovens
or kettles as the heat/steam could
cause nuisance alarms
Optical Smoke Alarms
• Sensitive to larger smoke particles,
more responsive to smouldering fires
from foam filled furniture, bedding or
burning PVC wiring
• Less vulnerable to false alarms from
cooking vapours but more prone to
false alarm from dust or insect ingress
• Suitable for general use but most
appropriate for circulation areas such
as hallways and near kitchens
• Near a decorative object, door,
light fitting, window moulding etc.,
that may prevent smoke from
entering the smoke alarm
• Surfaces that are normally warmer
or colder than the rest of the room
(for example attic hatches,
uninsulated exterior walls etc.).
Temperature differences might
stop smoke from reaching the unit
• Next to or directly above heaters
or air conditioning vents, window
wall vents etc., that can change
the direction of the airflow
Heat Alarms
•
Fixed temperature type, temperature
range 54° - 62°C. Not prone to false
alarms from dust or vapours, but
generally less sensitive than smoke
alarms
•
For use in areas where a
• In very high or awkward areas
where it may be difficult to reach
the alarm for testing
conventional smoke alarm is not
suitable e.g. kitchens, garages and
perhaps living and dining rooms, but
18
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insects or cobwebs from the sides
and cover slots where the smoke
enters. Turn off the mains and wipe
the cover with a damp cloth. Dry
cover thoroughly with a lint free
cloth. Other than the cleaning
described, no other customer
servicing of the product is required.
Repairs, when needed, must be
carried out by the manufacturer
(iv) Check the battery annually. Refer
to the specific user instructions
(v) Protect the alarm with the dust
cover supplied when any renovation
work or redecoration is being
carried out. Remove the cover
immediately when all work is
• Do not locate unit within 1m of
dimmer controlled lights and wiring
- some dimmers can cause
interference
• Do not wire into the same circuit as
a dimmer
• Do not locate unit within 1.5m, or
route wiring within 1m of fluorescent
light fittings as electrical “noise”
and/or flickering may affect the unit.
Do not wire into the same circuit as a
fluorescent light
• Do not locate ceiling mounted units
within 30cm of walls or corners
• Do not locate near very dusty or dirty
areas, as dust build-up in the
chamber can make the unit too
sensitive and prone to false alarm
• Do not locate in insect infested areas.
Small insects getting into the chamber
can cause intermittent alarms
reach the alarm. Smoke may be
prevented from reaching the alarm
if the fire is too far away or if the fire
is behind a closed door, in a
chimney or wall cavity for example,
or if prevailing draughts carry the
smoke away
completed as the alarm will not
function correctly with the cover in
place. Alternatively, with ‘Easi-fit’
style alarms, simply remove the
detector head in the advised
manner
• Installing smoke alarms in every
room, or a heat alarm in areas
where a smoke alarm is not suited,
will very significantly improve the
probability of early fire detection
• The alarm may not be heard. Once
installed in its intended location you
should check that you can hear the
alarm even with the door closed;
this is particularly important to test in
the bedroom. If it cannot be heard,
install more alarms. Remember
mains powered alarms must be
interconnected
(vi) Do not paint an alarm or allow paint
to contaminate it when decorating
FALSE ALARMS
• Smoke alarms may not detect every
type of fire early enough. As stated
earlier, ionisation alarms and optical
alarms respond differently to the
different types of fire. Fire caused by
escaping gas, violent explosions or
poor storage of flammable liquids
can spread too quickly for a smoke
alarm to give an early warning
• A heat alarm will not sense smoke
and will only trigger when the
ambient temperature reaches the
range 54°C to 62°C
• Smoke and heat alarms do not last
indefinitely. For example, a build up
of contamination can cause false
alarms, more so in the case of
optical smoke alarms. Over a
period, depending upon the
TESTING & MAINTENANCE
Minimum monthly, recommended weekly
(i) Check that the green mains indicator
light is on (if it is off check circuit
These can best be minimised by the
careful selection, siting and
maintenance of alarms. It is a good
idea to specify alarms with a ‘hush’
(false alarm control) button to
temporarily silence false alarms from
cooking vapours, steam or excessive
tobacco smoke, for example. This
facility will also help to reduce the risk of
users attempting to disable the alarm
by, for example, removing the battery or
tampering with the mains.
breakers, fuses and wiring)
(ii) Press the test button for at least ten
seconds to ensure that the smoke
chamber, electronics and sounder are
working and that all the alarms that
are interconnected are sounding. A
red light behind the test button, or on
the cover will flash rapidly while the
horn is sounding. The alarm will stop
soon after the button is released. Do
not test with a flame or smoke
(iii) Check for any sign of contamination
such as cobwebs or dust. Smoke
alarms must be cleaned regularly. This
is particularly true of optical alarms,
and alarms placed in dusty areas.
Use the narrow nozzle attachment of
a vacuum cleaner to remove dust,
conditions, the electronic
components will degrade. For these
reasons, all manufacturers
recommend regular testing and
replacement after no more than
ten years
LIMITATIONS OF SMOKE
ALARMS
• Smoke alarms will not detect a
fire if sufficient smoke does not
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19
• Hush button for false alarm control
MAINS POWERED ALARMS
WITH BUILT -IN
Easi-fit DESIGN
TECHNOLOGY
•
Interconnects with other Ei Professional
mains powered smoke and heat alarms
RECHARGEABLE LITHIUM
CELLS - DESIGNED TO LAST
THE LIFE OF THE ALARM
• Separate mains and warning LEDs
• Time and money saving Easi-fit design
• 5 year guarantee
One of the most significant developments
in the design of smoke alarms since the
introduction of BS 5839: Pt.6 has been the
introduction of new ‘Easi-fit’ design
technology. Easi-fit alarms are
exceptionally quick and simple to install,
helping to reduce installation costs.
Further cost-savings are also made
possible because Easi-fit alarms do not
require the separate purchase of an
additional wiring enclosure or mounting
kit. Easi-fit technology is now available on
both the 160 series and 140 series
detailed below.
• Kitemarked to BS 5446: Pt.1: 2000
Why 10 year+ Technology -
Rechargeable Lithium Cells
Ei144 Heat With Hush
• Ideal for protecting kitchens and areas
where smoke alarms are not
Highest Capacity
• Over 6 months initial stand-by capacity
without mains power
• After 10 years on charge the stand-by
capacity is sufficient to power the
alarm for over 3 months without mains
power
considered suitable
• Fixed temperature fast response
thermistor sensor, range 54° - 62°C
• Alkaline battery supplied already
connected to reduce installation errors
(does not draw power until alarm is
fitted to mounting plate)
• Hush button for false alarm control
• Interconnects with other Ei Professional
mains powered smoke and heat alarms
• Separate mains and warning LEDs
• Time and money saving Easi-fit design
• 5 year guarantee
Very Low Self Discharge
Off charge the cells lose only
approximately 2% of their total
capacity per year - so even after long
periods in storage, the cells could still
power a smoke alarm for a
considerable length of time prior to
recharging (for up to three months after
ten years). Cells can be discharged
and recharged many times.
INNOVATIVE DESIGN AND
QUALITY FEATURES
THROUGHOUT
Whether you chose 160 series alarms with
high performance 10 year+ rechargeable
lithium back-up power cells, or opt for the
140 series with conventional battery back-
up system, the detection technology and
build quality remain constant across every
unit built by Ei. Because we understand
that lives can depend on the
• Kitemarked to BS 5446: Pt.2: 2003
Ei146 Optical With Hush
• More responsive to slow smouldering
fires
• Advanced optical chamber with
proven extended life capability. Fitted
with insect resistant screen
Built-in Tamper Resistant
Construction
• Cells are soldered for reliable long term
connection
performance and reliability of an alarm,
even budget units are made to an
• Alkaline battery supplied already
connected to reduce installation errors
(does not draw power until alarm is
fitted to the mounting plate)
• Hush button for false alarm control
• Interconnects with other Ei Professional
mains powered smoke and heat
alarms
• Terminals are laser welded for high
reliability
uncompromising specification.
•
No cell maintenance required - cells
designed to outlast the life of the alarm
Easi-fit 140 SERIES MAINS
POWERED ALARMS WITH 9V
ALKALINE BATTERY BACK-UP
Safety
The cells have been tested and
approved by the British Standards
Institute and Underwriters Labs Inc (USA)
for use in this application. They have
also been comprehensively safety tested
both by the manufacturer (Panasonic)
and by Ei Electronics.
Designed for applications where the
budget is a key consideration and there
is no requirement for lithium power cell
back-up. The 140 Series provides an
alkaline battery back-up instead of
rechargeable cells and comprises
competitively priced units built to the
same high standard as all Ei alarm
products. Further cost savings are
offered through the use of Ei’s innovative
and totally unique Easi-fit technology.
• Separate mains and warning LEDs
• Time and money saving Easi-fit design
• 5 year guarantee
• Kitemarked to BS 5446: Pt.1: 2000
Easi-fit 160 SERIES MAINS
POWERED ALARMS WITH 10
YEAR+ RECHARGEABLE
LITHIUM CELLS
Ei141 Ionisation With Hush
• Responds quickly to fast flaming fires
• Unique and proven long life ionisation
smoke chamber
• Alkaline battery supplied already
connected to reduce installation errors
(does not draw power until alarm is
fitted to the mounting plate)
The 160 series offers all the advanced
detection capabilities and quality
lithium cell back-up afforded by the
proven and best-selling 150 series, but
combines it with the benefits of Easi-fit
design technology and offers a new
slimline, rounded shape.
20
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insect resistant screen
back-up designed to outlast the
alarm - life expectancy of cells
endorsed by Panasonic
Ei161 Ionisation With Hush
• Separate mains and warning LEDs
• Hush button for false alarm control
• Low power cell warning in the event
of a mains or cell failure
• Precision charging circuit ensures
peak cell performance
• Proven 10 year+ rechargeable lithium
cell back-up
• Kitemarked to BS 5446: Pt.1: 2000
•
•
•
Responds quickly to fast flaming
fires
• Kitemarked to BS 5446: Pt.1: 2000
Advanced suppression and
calibration technology
THE 150 SERIES MAINS
POWERED ALARMS WITH
10 YEAR+ RECHARGEABLE
LITHIUM CELLS
Unique and proven long life
ionisation smoke chamber
Hush button for false alarm control
Separate mains and warning LEDs
10 year+ rechargeable lithium cells
back-up designed to outlast the
alarm - life expectancy of cells
endorsed by Panasonic
•
•
•
Advanced detection technology
coupled with superior 10 year+
rechargeable lithium cell back-up has
made the 150 Series the market leader
and the first choice for specifiers
nationwide.
• Kitemarked to BS 5446: Pt.1: 2000
The 150 Series popularity and reliability
is proven by the fact that several million
units have now been installed and are
currently protecting households
throughout the UK.
Ei151TL Ionisation With Hush
• Responds quickly to fast flaming fires
• Unique and proven long life Ei
ionisation smoke chamber
• Easy to use Test and Hush buttons
• Separate mains and warning LEDs
• Low power cell warning in the event
of a mains or cell failure
Ei164 Heat With Hush
•
Ideal for protecting kitchens and
areas where smoke alarms are not
considered suitable
DISPOSAL
• Precision charging circuit ensures
peak cell performance
• Proven 10 year+ rechargeable lithium
cell back-up
•
•
Advanced suppression and
calibration technology
All ionisation smoke alarms contain a
small amount of radioactive material
(Americium 241). The radiation from this
source is over 10,000 times less than
natural background radiation from the
ground, buildings and outer space.
Fixed temperature fast response
thermistor sensor, range 54° - 62°C
Hush button for false alarm control
Separate mains and warning LEDs
10 year+ rechargeable lithium cells
back-up designed to outlast the
alarm - life expectancy of cells
endorsed by Panasonic
• Kitemarked to BS 5446: Pt.1: 2000
•
•
•
Ei154TL Heat
• Ideal for protecting kitchens and
areas where smoke alarms are not
considered suitable
• Fixed temperature fast response
thermistor sensor, range 54° - 62°C
• Separate mains and warning LEDs
• Low power cell warning in the event
of a mains or cell failure
• Precision charging circuit ensures
peak cell performance
• Proven 10 year+ rechargeable lithium
cell back-up
Experts have stated that the risk is
minuscule - the equivalent of moving
to the floor above and being that
much closer to the sun! The National
Radiological Protection Board carries
out extensive tests on ionisation smoke
alarms and have concluded that they
are radiologically safe. They also
consider that it is safe to dispose of old
smoke alarms in normal household
rubbish, at the rate of one per bin of
household refuse.
• Kitemarked to BS 5446: Pt.2: 2003
Ei166 Optical With Hush
• More responsive to slow smouldering
fires
• Advanced suppression and
calibration technology
• Large volume high performance
optical chamber with proven
extended life capability. Fitted with
insect resistant screen
• Kitemarked to BS 5446: Pt.2: 2003
Ei156TLH Optical With Hush
• More responsive to slow smouldering
fires
• Features the large, advanced Ei
optical chamber with proven
extended life capability, fitted with
• Hush button for false alarm control
• Separate mains and warning LEDs
• Auto self-test feature continually
monitors the sensor every 40 seconds
for additional safety
Please note that there are no special
disposal requirements for the lithium cells
used as back-up in Ei mains powered
alarms as they do not contain any
regulated materials.
• 10 year+ rechargeable lithium cells
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21
ground level
• Fitted with rechargeable lithium cells
to last in excess of 10 yrs
• Up to twelve alarms on one system
• Programmable repeater function for
more difficult applications
• Allows easy identification of the site
of a fire, or the location of a false
alarm
FOUNDATION OF THE
COMPLETE SOLUTION TO
RESIDENTIAL FIRE
• No wiring required
• Neat appearance – same size as a 2
gang light switch
• Wide range of compatible accessories
DETECTION
•
Fitted with long life 10 yr+ lithium cells
RADIOLINK ANCILLARY
PRODUCTS
The use of radio interconnection in Grade D
alarm systems means that it is much easier
to comply with the extended alarm
coverage recommended in BS 5839: Pt.6:
2004. With no interconnect wiring required,
the contractor and specifier can agree
fixed costs, allowing a quicker, simpler and
more cost effective solution to smoke and
heat alarm installation programmes.
• No battery replacement required
• Unique coding to prevent
interference
• For use with 140 and 160 series
alarms on an Ei168 RadioLINK base
Ei428 Remote Relay
Module
Ei410 Wireless Remote
Control – Hand Held
• Mains powered
• Easy to install
• For use with 140 and 160 series
alarms on an Ei168 RadioLINK base
• Unique coding to prevent
interference
• Same features as the Ei411 but is a key
fob size designed for personal use.
Based on proven wireless technology,
RadioLINK from Ei provides a quality mains
powered wireless interconnect solution.
The Ei168 RadioLINK base can be used
with either Ei140 or Ei160 Easi-fit alarms,
plus ancillary products thereby combining
proven quality detection capability and
performance with proven wireless
technology.
•
Rechargeable 10 yr+ cell back-up
enables the relay to be operational
even in a mains failure – ideal for
Warden Call Systems and Alarm
systems for the deaf and hard of
hearing
Ei407 Wireless Manual
Call Point
• 5 amp relay with volt free contacts
• Switchable to constant or pulse
operation
Ei168 RadioLINK Base
Ei411 Wireless Remote
Control - Wall Mounted
Switch
• Allows manual testing of the system
• Allows manual alarm to warn other
occupants
• Same size as a standard Manual Call
Point
• No wiring required
• Fitted with long life 10 yr+ lithium cells
• No battery replacement required
• Unique coding to prevent
interference
• Mains powered
• Easy to install - simply fits underneath
each alarm
• For use with 140 and 160 series alarms
on an Ei168 RadioLINK base
• Unique coding to prevent
interference
• Allows testing of the system at
22
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ANCILLARY FIRE
DETECTION PRODUCTS
• Alarm clock input
• Can be used with RadioLINK
ALARM SYSTEMS FOR
THE HEARING
IMPAIRED
Ei169 - Control box with integral
strobe, vibrating pad and cable for
connections, for use with the 150
series alarms (not supplied).
Residents with hearing difficulties
require a different approach to
fire protection. The Ei Professional
Alarm for the hearing impaired is
currently the only unit on the
market made by an experienced
smoke alarm manufacturer.
EI169/160 - As above for use with 160
Series alarms (not supplied).
• High intensity integral strobe
• Can be interconnected with up to
twelve alarms
Ei169RF - Comprises control box with a
RadioLINK transceiver, integral strobe,
vibrating pad and cable for
• Plug in or wire in options
• Easily installed
• Test buttons
• Auxiliary socket
• Self-diagnostics for extra safety
• Remote trigger facility
Comprising a powerful strobe light
and vibrating disc, the unit is
available with a mains powered
control panel and either 230V or
9V smoke alarm options with full
battery back-up.
connections. Only suitable for use with
smoke and heat alarms using an Ei168
RadioLINK base. Other RadioLINK
control devices can be used with this
model. RadioLINK base and
smoke/heat alarm not supplied.
Ei175 - Supplied with low voltage
Ionisation Smoke Alarm.
Ei176 - Supplied with low voltage
Optical Smoke Alarm.
Ei176RF - Comprises control box with a
RadioLINK transceiver, integral strobe,
vibrating pad and cable for connections.
Supplied with RadioLINK Ei3105RF optical
smoke alarm. Other RadioLINK control
devices can be used with this model.
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23
This convenient unit allows the user to
locate the precise source of an
alarm in installations comprising three
or more units. Pressing the locator
button stops all the alarms sounding
except for the one that was the
source of the alarm.
• The ideal way to quickly and easily
find the source of any alarm
• Easy to install
MODIFIRE
INTERMEDIATE SYSTEMS (GUIDE ONLY)
A Modifire system is exceptionally simple
to design and install, thanks to its modular
design and unique Easi-fit technology.
Just tailor the system to meet the needs
of the premises. The Ei161R ionisation or
Ei166R optical alarm with rechargeable
back-up provides the starting point. Then
you can add extra alarms, call points and
locator switches as required, all
• Ideal for larger premises and HMOs
• Auto reset within ten minutes
• Minimises disturbance to other
residents
interconnected with PVC mains wiring
cable. Only one ‘R’ unit - Ei161R or Ei166R
- is necessary for each system.
• Suitable for use with any of the
140, 150 and 160 series alarms
BASIC SYSTEM (GUIDE ONLY)
• System to cover escape routes only
• Choose from Ei161R ionisation or Ei166R
optical alarms
• Connect Manual Call points MCP400
into the circuit
Ei128R Relay Base - mains
powered only
MCP400 Manual Call Point
BASIC SYSTEM (GUIDE ONLY)
• For use with 140 and 160 series
• Surface Mount Kit or pattress
• 5 amp relay with volt free contacts
• Switchable for constant or pulse
operation
• Allows signalling to door closers,
sounders, strobes etc
• Suitable for use with Modifire
•
•
For use with Ei151TLR, Ei156TLR, Ei161R,
Ei164R or Ei166R alarms
Supplied complete with surface
mount box
Testing key supplied
Supplied with non-breakable
operating element
•
•
Ei128RBU Relay Base
- mains with rechargeable
back-up
•
•
Suitable for use with Modifire
LPC approved, conforms to
BS EN 54-11
INTERMEDIATE SYSTEM
• For use with 140 and 160 series
• 5 Amp relay with volt free contacts
(GUIDE ONLY)
• System to cover escape routes AND
high risk areas
Ei159 Smoke Alarm
Locator Switch
•
Switchable for constant or pulse
operation
• Install Ei161R or Ei166R alarm and add
further ionisation (Ei161), optical (Ei166)
and heat alarms (Ei164) as required to
a maximum of 20 alarms. The Ei128R
relay base counts as one alarm
• Connect into the circuit Manual Call
Points MCP400 as required
• Features rechargeable lithium back-
up cells with 10 yr+ life
• Ideal for signalling to devices not
affected by a mains failure, such as
Warden Call Systems
• Connect into the circuit Alarm Locator
Switches Ei159 as required
• Mount an Ei128R or Ei128RBU relay base
behind the ‘R’ unit to signal warden call
devices, strobes, sounders etc
24
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SAB300 Remote Strobe
Xenon Beacon
• For operation via an Ei158R or Ei128R
relay
• Suitable for use with Modifire
Ei152 Remote Test & Hush
Switch
• Mains powered
The Remote Test and Hush Switch is
specifically designed for use with the
Ei151TLR, Ei156TLR, Ei161R, Ei164R or
Ei166R alarms.
• Tests alarms or silences false alarms
(only on ‘R’ models in the system)
without the need to reach the
alarm itself
• For internal or external use
• Flash energy of 3 watts and flash
frequency of .9Hz
• Clear or red lens options
• For operation via an Ei158R or Ei128R
relay
MDH230 Magnetic Door
Holder
• Suitable for use with Modifire
• Ideal for the infirm or elderly
• Wall mounted
• Easy to use - large clear red
buttons
SABV4 High Intensity Strobe
Xenon Beacon
• Suitable for use with Modifire
Ei167 Remote Sounder
• Mains powered
• Automatically releases a fire door in
the event of a fire
• Test/Override button feature
• Holding capacity of 11.3kg
• Low current consumption
• For operation via an Ei158R or Ei128R
relay
• Mains powered
• Ideal for use where standard strobes
may not be sufficiently visible
• 5 joule high intensity flash
• Low current consumption
• Red or opal lens option
• For operation via an Ei158R or Ei128R
relay
• Suitable for use with Modifire
Ei127 Surface Mount Kit
The Remote Sounder can be used for
interconnection with any Ei mains
powered alarm. It contains no smoke
sensor itself, but is triggered by a signal
from the interconnect circuit. It is
ideal for use where an alarm - but no
detection - is required.
• Wall or ceiling mounted
• Integral rechargeable lithium cell
back-up
• Interconnects with all mains
operated smoke and heat alarms
• Manual test button
• AC mains indicator light
• 85dB(A) alarm at 3m
• Suitable for use with Modifire
YO3 Remote Sounder
A powerful mains operated sounder
ideal for use in areas where a
warning is required - but a detector
isn’t.
• Mains powered
• For internal or external use IP54
• Offers a range of switchable sound
frequencies from 500Hz to 2900Hz
• Switchable sound outputs from 97-
100dB(A)
• For 140 and 160 series alarms
• For use on uneven ceilings
• Useful for applications involving
complex wiring
• Suitable for use with Modifire
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25
SAT332 Smoke Alarm Tester
9 Volt Alarms With 10
year+ Life Lithium Battery
Cells
This useful device - used in conjunction
with an SAA300 aerosol of synthetic
smoke - is the only reliable method of
testing the smoke chamber on ionisation
and optical alarms.
• Safe and easy to use
• Synthetic smoke is non-flammable
and environmentally friendly
Both of these alarms are supplied with
tamper-resistant, non-replaceable 10
year life lithium battery cells to meet the
requirements for a BS 5839: Pt.6, Grade
F system for single storey tenanted
properties.
Ei115 Anti-Vandal Cage
Ei100TYC- Ionisation with 10 year+ life
Lithium battery, false alarm
'silencer' button and
interconnect.
Ei3105TYCH- Optical with 10 year+ life
lithium battery, false alarm
'silencer' button and
interconnect.
Up to twelve Ei100TYC and Ei3105TYCH
may be interconnected.
Carbon Monoxide
Protection
• Fits all Ei alarms
• Screws on to the ceiling
• Test and Hush buttons can be easily
accessed
Ei Electronics is an acknowledged
leader in the field of mains and battery
powered Carbon Monoxide alarms.
Please contact us for more information.
• Measures 170 x 170 x 95mm
LOW VOLTAGE
180 SERIES ALARMS
Ionisation - Model Ei181
Optical - Model Ei186
Heat - Model Ei184
• Supply voltage 10.5 to 30 volts
• Power on indicator
• Interconnect up to twelve alarms
• Alkaline battery back-up
• Hush feature on all models
• Relay contacts selectable for
continuous or pulse operation
26
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key products. It’s a valuable resource
for specifiers, contractors and
wholesalers alike, and it’s being
continually updated to bring you the
very latest additions to our range as
they arrive.
All smoke alarms, but more particularly the
optical type, are prone to dust and insect
ingress which can cause false alarms. The
latest design, materials and manufacturing
techniques have been used in the construction
of our alarms to minimise the effects of
Ei SMOKE ALARMS - THE
FIRST CHOICE FOR LOCAL
AUTHORITIES AND
HOUSING ASSOCIATIONS
NATIONWIDE
contamination. However, it is impossible to
completely eliminate the effect of dust and
insect contamination. Therefore, to prolong the
life of the smoke alarm it must be kept clean so
that excess dust does not build up. Any insects
or cobwebs in the vicinity of the smoke alarm
should be promptly removed. In certain
circumstances, even with regular cleaning,
contamination can build up in the smoke
sensing chamber causing the alarm to sound.
If this happens, the alarm must be returned for
servicing or replacement. Contamination is
beyond the manufacturer’s control, and is
considered normal wear and tear.
Ei Professional smoke alarms and
ancillary products have been
TROUBLE SHOOTING
specified by literally hundreds of Local
Authorities and Housing Associations
in England, Scotland, Wales and
Northern Ireland as the products of
choice for their retrofit programmes.
Many of these would be pleased to
discuss their experiences of product
reliability and after sales support with
interested parties. Please contact our
Customer Services Department for
further information.
Please Note: many alarms that are
returned to Aico as “faulty” are found
to have circuit damage. This is largely
due to incorrect wiring on installation.
Although all mains powered smoke
alarms are double insulated, mixing live
and neutral will damage
interconnected alarms. This damage
can also occur if the connector plug
momentarily short circuits across the
power pins when installation takes
place with the power on. It is essential
that live and neutral wires are correctly
identified and that all connections are
made before the mains power is
switched on!
In addition, many builders, architects
and installers recognise the benefits of
fitting smoke and heat alarms that
have proven to be extremely reliable
in many thousands of ‘New Build’
installations throughout the UK.
This list is not comprehensive. You should
refer to the specific user instructions that
accompany each product for further
guidance.
Problem
Solution
TECHNICAL SUPPORT
Alarm sounds
for no apparent
reason
Identify the alarm source. The red LED under the test button or on
the cover will flash rapidly only on the unit which is the source of
the alarm. Press hush button if fitted. Check for fumes, steam etc.
from the kitchen or bathroom (paint and other fumes can cause
nuisance alarms). Fan the alarm vigorously with a newspaper to
disperse fumes. If alarm does not stop, switch off mains and
remove the unit with the rapidly flashing red LED.
Our highly trained and experienced
staff in the Customer Services
Department will be pleased to assist
you with any queries that you may
have regarding installation,
maintenance, or product specification.
Telephone 0870 758 4000 and ask for
Customer Services.
Alarm beeps
continuously
(approx once
per minute)
Alarm may be in ‘hush mode’ (Ei150, 151TL & 151TLR only). Cells (150
& 160 series) or batteries (140 series) may be depleted. Check the
green mains light is on. If not, check fuse, circuit breakers and wiring
connections. 140 series - the battery may require replacement.
Switch off the mains supply, remove the alarm and replace battery.
150 & 160 series - the cells may require recharging. This will occur
automatically if the mains power is connected. The cells are not
replaceable. If all the above actions have not silenced the beeping,
there may be a fault. Switch off the mains and replace the unit.
Sections of BS 5839: Pt.6: 2004 are
reproduced with the permission of BSI.
A complete edition of the standards
can be obtained by post from: BSI
Customer Services, 389 Chiswick High
Road, London W4 4AL.
Interconnected
alarms do not
all sound
For more detailed information on our
range of smoke, heat and Carbon
Monoxide alarms, please ask for a
copy of our latest product brochure.
Hold test button for ten seconds to ensure that the signal is
transmitted to all alarms on the system. Switch off the mains power
and check that the live, neutral and interconnect wires are tight
and have been correctly connected on all alarms in the system.
Incorrect wiring will damage alarms.
AICO ON THE WEB
Frequent
nuisance
alarms occur
Ensure the kitchen and bathroom doors are closed when in use.
Ensure that the alarm is sited at least 6m away from sources of
fumes. Contamination from insects, dust, paint etc. may have
occurred; clean the alarm. If the problem persists, resiting of the
alarm should be considered. Alternatively, changing to a model with
a different sensor type may resolve the problem.
If you haven’t already looked us up,
you’ll find that the Aico web site at
www.aico.co.uk is well worth a visit,
with detailed technical information
on our unrivalled range of products
and guidance on the installation of
Download from Www.Somanuals.com. All Manuals Search And Download.
27
A Guide to
Residential Fire Detection
With Reference to BS 5839: Pt. 6: 2004
Aico Ltd, Mile End Business Park, Maesbury Road, Oswestry, Shropshire SY10 8NN
Tel: 0870 758 4000 Fax: 0870 758 4010 • Sales - Tel: 0870 758 4001 Fax: 0870 758 4011
Aico Ltd is a wholly owned
subsidiary of Ei Electronics
E & OE As our policy is one of continuous development,we reserve the right to amend designs and specifications without prior notice. Every
care has been taken to ensure that the contents of Dthoiswdonclouamdenfrtoamre Wcowrrewc.tSaotmtheantimuaelso.fcpoumbl.icAaltlioMn aannduawles sShealal brcehunAdnedr nDooliwabnilliotyad.
whatsoever in respect of such contents.
GRFD0905 ISSUE 2
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