SF Detection SF340 series User Manual

CARBON MONOXIDE ALARM

Model SF340 series

CAREFULLY READ AND UNDERSTAND THE CONTENTS OF
THIS INSTRUCTION MANUAL BEFORE USING THE ALARM.

RETAIN THE MANUAL IN A SAFE PLACE

FOR FUTURE REFERENCE.
PAY PARTICULAR ATTENTION TO THE SAFETY WARNINGS.
BE SURE TO PASS THE MANUAL ON TO ANY SUBSEQUENT

USERS OF THE ALARM.

WHEN INSTALLING THIS ALARM

FOR USE BY OTHERS PLEASE

LEAVE THIS MANUAL OR A COPY

WITH THE END USER.

SF Detection Ltd.

4 Stinsford Road, Nuffield Industrial Estate
Poole, Dorset BH17 0RZ
Tel: [phone] Fax: [phone]

User Manual

2102M0610

Issue C 09/99

TESTING YOUR ALARM

A green power light indicates power is supplied. The alarm should be tested weekly by pushing
and holding the test button on the front of the unit. The alarm signal should sound. If relay
models are in use or units are interconnected please be aware that the relay function will be
activated upon test.

CARE AND MAINTENANCE OF ALARM

The outside casing of the alarm should be wiped occasionally with a cloth. Ensure that the
holes on the front are not blocked with dirt and dust. DO NOT USE CLEANING AGENTS,
BLEACH OR POLISH.

IMPORTANT

· Ideally it is recommended that a carbon monoxide alarm should be
installed in or near to every room which contains a fuel burning appliance
such as gas fires, central heating boilers, room heaters, water heaters,
cookers, grills etc

· Ensure that the alarm buzzer can be heard by all those who are
intended to hear it.

· Seek medical help if it is suspected that a member of the household is
suffering from carbon monoxide poisoning.

IF FURTHER DETAILS ARE REQUIRED THAT DO NOT APPEAR

IN THIS MANUAL PLEASE CONTACT SF DETECTION LTD.

PACK CONTENTS:
Models SF340E, SF340F, SF340H, SF340J Model SF340G will contain:

will contain: One alarm,

One alarm, One Sensor Module (SF340M),
One Sensor Module (SF340M), One instruction manual,
One instruction manual, One installation kit, consisting of:
One installation kit, consisting of: Two wall plugs,

Two wall plugs, Two fixing screws,
Two wall fixing screws, Two spacers.
Two electrical mounting screws.

SPECIFICATION

Models: SF340E,F,G,H,J.

Gas Detected: Carbon monoxide.

Detection Principle: Electro-chemical cell.

Alarm Indication: Flashing red light and audible alarm.

Alarm Levels: 150ppm Between 10 and 30 minutes.

350ppm Within 6 minutes.

(as required by BS7860: 1996)

Supply Voltage Range: SF340E,F,G 220/240Vac, 50Hz

SF340H 12Vdc ±10%
SF340J 12Vdc ±10% or 24Vdc ±10%

Operating Temperature: -5ºC to 40ºC.

Humidity Range: 30 to 90% RH.

Warm-up Time after Initial Switch On: Instantaneous.

Normal Module Operating Life: 5 years.

Backup Battery Life when in Alarm: At least 5 days.

Dimensions: 170mm x 110 mm x 65mm.

Weight: Approximately 575g.

DISPOSAL WARNING: Do not dispose of in fire.

GUARANTEE

We guarantee your new gas alarm for five years from the date of purchase and under normal
use and service, to be free from defects in materials and workmanship. During this period we
will at our discretion, repair, replace or refund the price of any part of the alarm which is found
to be defective in either materials or workmanship providing this occurs under normal use
and service. We shall however be under no obligation to repair, replace or refund the price of
units which are found to be defective in any way due to damage, neglect, unreasonable use
or which have been tampered with or found to have been dismantled. Defective units should
be returned, in suitable packaging, along with proof of purchase to SF Detection Limited,
4 Stinsford Road, Nuffield Industrial Estate, Poole, Dorset. BH17 0RZ. An accompanying
letter should clearly state the nature of the problem with the alarm. This guarantee does not
affect your statutory rights.

INTRODUCTION

Thank you for purchasing this alarm which is designed to detect the presence of carbon
monoxide (CO) gas. This manual contains information on the installation and the operation
of the SF340 modular carbon monoxide alarm.

THIS ALARM SHOULD ONLY BE

INSTALLED BY A COMPETENT PERSON

ALL ELECTRICAL WIRING SHOULD BE

INSTALLED IN ACCORDANCE WITH THE

CURRENT WIRING REGULATIONS OF THE

INSTITUTE OF ELECTRICAL ENGINEERS

2. WHAT ARE THE SYMPTOMS OF CARBON MONOXIDE POISONING?

The following symptoms are related to carbon monoxide poisoning and should be discussed
with ALL members of the household:

Mild exposure: Slight headache, nausea, vomiting, fatigue (often

described as “flu-like” symptoms)

Medium exposure: Severe throbbing headache, drowsiness,

confusion, fast heart rate.

Extreme exposure: Unconsciousness, convulsions, cardiorespiratory

failure, death.

Many reported cases of carbon monoxide poisoning indicate that while victims are aware
they are not well, they become so disorientated that they are unable to save themselves by
either exiting the building or calling for assistance. It is also important to note that young
children and pets may be the first to be affected.

3. IN WHICH ROOM SHOULD I PUT THE ALARM?

Ideally you should have an alarm in or near every room which contains a fuel-burning appliance.
However, if you have more than one appliance but only one alarm, you should take the

following into consideration when deciding where best to put the alarm:

· If there is a fuel burning appliance in a room where people sleep, you
should put the alarm in that room.

· If there is a fuel burning appliance in a room you use a lot such as a
sitting room, you should put the alarm in that room.

· If you live in a bed-sit put the alarm as far away from the cooking
appliance as possible, but near to the room where you sleep.

· If the fuel burning appliance is in a room not normally used (e.g. a boiler
room) put the alarm just outside the room so you will be able to hear it.

4. WHERE SHOULD I PUT THE ALARM?

Carbon monoxide has a similar density to warm air. To ensure the most effective use is made
of the alarm it should be fitted at least 1.5m(5’) above floor level and at least 1.85m (6’) from
the fuel burning appliance.

ALARM

1.85m
(6 )

(min)

1.5m
(5 )

(min)

5. WHERE NOT TO PUT THE ALARM

Do not place the alarm in the following areas:

· Outside the building.

· In or below a cupboard.

· In a damp or humid area.

· Directly above a sink or cooker.

· Next to a door or window or anywhere it could be affected by drafts.

· Where the airflow to the alarm could be obstructed by curtains or furniture.

· Where dust or dirt could collect and block the sensor.

· Where the temperature could drop below -5ºC or rise above 40º C.

· Where it could be easily knocked or damaged.

· Within 1.5m (5 feet) of any cooking appliance.

1. WHAT IS CARBON MONOXIDE?

Carbon monoxide is a highly poisonous gas which is released when fuels are burnt. It is
invisible, has no smell and no taste, therefore it is very difficult to detect with the human
senses.

Gas, coal
or wood
fire

Clogged
chimney
or flue

Boiler
or
heater

Car
fumes
from
garage

Water
heater

Portable
cooking
equipment
used in
enclosed
areas

Portable
gas or
paraffin
heater

Kitchen
cooker

Potential danger areas in your home

Under normal operating conditions, in a room where fuel burning appliances are well maintained
and correctly ventilated, the amount of carbon monoxide released by the appliances is not
dangerous.

A dangerous quantity of carbon monoxide can occur if one or more of the following
conditions exists:

1. An appliance is faulty or badly maintained.

2. A flue is partially or totally blocked.

3. A room is not adequately ventilated.

The following conditions can result in transient carbon monoxide situations:

1. Excessive spillage or reverse venting of fuel burning appliances caused by
outdoor ambient conditions such as:
i. Wind direction and/or air velocity; including high gusts of wind. Heavy

air in the vent pipes(cold humid air with extended periods between cycles)
ii. Negative pressure differential resulting from use of exhaust fans.
iii. Simultaneous operation of several fuel burning appliances competing

for limited internal air.
iv. Flue connections breaking loose from clothes dryers, water heaters or

boilers.
v. Obstructions in or unconventional flue designs which can amplify the

above situations.

2. Extended use of unvented fuel burning devices.

3. Temperature inversions which can trap exhaust gases near the ground.

4. A car running in an open or attached garage near a home.

This manual covers the following models:

SF340E 230V, 50Hz Standard Model
SF340F 230V, 50Hz Output Model (for relay and interconnect feature)
SF340G 230V, 50Hz Lead & Plug Model
SF340H 12Vdc Standard Model
SF340J 12/24Vdc Output Model (for relay and interconnect feature)

Each of the models above comes complete with:

SF340M Carbon Monoxide Sensor Module including battery back-up and

electrochemical gas sensing system.

WARNING

Actuation of your carbon monoxide(CO) alarm indicates the presence of
carbon monoxide(CO) which can KILL YOU.

THIS CARBON MONOXIDE ALARM MAY NOT PROTECT PEOPLE WHO
ARE AT SPECIAL RISK BY REASON OF AGE, PREGNANCY OR MEDICAL
CONDITION. THESE INDIVIDUALS MAY CONSIDER USING WARNING
DEVICES WHICH PROVIDE AUDIBLE AND VISUAL SIGNALS FOR CARBON
MONOXIDE CONCENTRATION UNDER 30PPM. IF IN DOUBT PLEASE
CONTACT YOUR MEDICAL PRACTITIONER.

A CARBON MONOXIDE ALARM IS NOT A SUBSTITUTE FOR A SMOKE
ALARM OR A COMBUSTIBLE GAS DETECTOR.

This carbon monoxide alarm is designed to detect carbon monoxide gas
from

any

source of combustion including wood, coal, coke, oil, petrol and gas.

THIS CARBON MONOXIDE ALARM IS

NOT:

· Designed to detect smoke fire or any other gas.

· To be seen as a substitute for the proper servicing of fuel-burning appliances

or the sweeping of chimneys.

· To be used on an intermittent basis, or as a portable alarm for the spillage of
combustion products from fuel burning appliances or chimneys.

CAUTION

This carbon monoxide alarm is designed for indoor use only. Do not expose to
rain or moisture. Do not knock or drop the alarm. Do not tamper with the
alarm as this could cause electric shock or alarm malfunction. The alarm will
not protect against the risk of carbon monoxide poisoning when the battery
back up is no longer functioning. This alarm will only indicate the presence of
carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. Do not paint.

6. OPERATION OF THE ALARM

POWER

LIGHT

ALARM/CONFIDENCE
LIGHT

TEST
BUTTON

BUZZER

GAS
INLET

The detector is not fitted with an on/off switch, it is automatically switched on when the power
source is activated. This is to ensure the detector can not be inadvertently switched off and therefore
fail to detect a build up of carbon monoxide.

Normal operation

When the unit is powered from the primary power source (e.g. 230Vac, 12/24Vdc), the green light
will be illuminated. (The green light will

not be illuminated when the battery backup is in use.)

When no carbon monoxide is present the red alarm light will flash approximately once every 60
seconds. This indicates the alarm is working correctly.

Alarm conditions

When the unit detects carbon monoxide, the alarm signal is given continuously. The red light will
flash and the buzzer will sound.

When the unit has been in alarm for a period of 40 minutes, the alarm signal will be given once
every 60 seconds.

Return to normal operation

When the carbon monoxide disperses, the alarm will automatically stop. The red light will flash
approximately once every 60 seconds (normal operation.)

Battery replacement warning

When the backup battery in the SF340M module needs replacing the audible alarm will sound a
single short beep once every 60 seconds. The battery must then be replaced. The red light will
flash once every 60 seconds as normal. See Section 10 on batteries.

Module replacement warning

When the module(SF340M) needs replacing, the audible alarm will sound two short beeps every
60 seconds. At this time the module must be replaced. The red light will flash once every 60
seconds as normal.

8. HOW SHOULD I INSTALL MY ALARM?

CABLE ENTRY POINTS

WALL FIXING HOLES

ELECTRICAL BOX MOUNTING HOLES

A. Mounting

Select a suitable location to install the alarm (see Section 4 ‘WHERE SHOULD I PUT
THE ALARM’ and Section 5 ‘WHERE NOT TO PUT THE ALARM’).

The model number and supply voltage are marked on the power supply unit and can be
viewed with the outer cover removed.

Models SF340E, SF340F, SF340H, SF340J

1. Remove the outer cover of the unit by gently pushing in the 2 edge clips.

Remove the power supply unit by pushing in the lower clip and lifting off.

2. Decide where the electrical supply cable is to enter the unit and cut out the

appropriate cable entry on the base. If the wiring to the unit is surface mounted,
standard 16mm x 25mm electrical trunking must be used for the cable.

3. The unit has been designed to be either surface or flush mounted:

a) Surface Mount
Mark the position of the 2 mounting holes, drill two 5mm diameter holes and
secure the unit to the wall using the screws and wall plugs provided.

b) Flush Mount
Using a standard 2 gang 28mm mounting box, complete the electrical connections
(see below), re-fit the power supply cover and secure using the 2 M3.5 screws
provided.

Model SF340G

1. This model is mounted using the 2 ‘keyhole’ slots provided on the back of the

unit. Make 2 holes 68mm apart using a 5mm drill. Fit the wall plugs into the
holes and either gently tap mounting pegs into the wall plugs or fit the screws
and spacers provided. Hook the unit over the 2 protruding pegs or screw heads/
spacers.

B. Electrical Connections

Model SF340E

1. The SF340E must be supplied from a non-switched 3 Amp fused spur (230Vac).

2. Connect the supply wiring to the 3 way terminal block provided.
(Maximum wire size is 2.5mm²)

BROWN

BLUE

LIVE
EARTH
NEUTRAL

( BROWN / RED )

( BLUE / BLACK )

SUPPLY
WIRING

UNIT

WIRING

3. Connect the brown wire of the power supply unit to the red or brown wire of the
supply (live).

4. Connect the blue wire of the power supply unit to the black or blue wire of the supply
(neutral).

5. No connection must be made to the mains supply earth. The earth wire can be
sleeved and connected to the third terminal of the block to avoid contact with any
other wires.

6. Once all electrical connections are made, locate the terminal block in the base by
fitting on the pegs.

7. Fit the power supply unit to the base ensuring that the wires sit in the base and do
not get trapped. Check that the power supply is positioned correctly and the fixing
clip has operated. Secure the power supply in place by tightening the securing screw.

Important: The power supply securing screw must be tightened

to ensure electrical safety.

Model SF340F

1. The SF340F must be supplied from a non-switched 230Vac spur. No external fuse
is required since a fuse is incorporated in the unit. (Maximum wire size is 2.5mm²)

2. Connect the red or brown (live) wire of the
supply to the terminal marked L on the
connection board fitted to the base of the
unit.

3. Connect the black or blue (neutral) wire of
the supply to the terminal marked N.

4. No connection must be made to the mains
supply earth.

(Refer to later section for Relay and Interconnect Connections)

Model SF340G

1 The SF340G is provided complete with electrical cable and fitted plug. The plug is

fitted with a 3A fuse and only 3A fuses must be used as replacements.
Plug into normal household 13A socket and switch on to operate. (See sections 3,

4, and 5 regarding siting of alarm.)

Model SF340H

1. The SF340H must be supplied from a non-switched 3 Amp fused spur (12Vdc).

2. Connect the supply wiring to the 3 way terminal block provided.

3. Connect the red wire of the power supply unit to the positive supply wire (+12Vdc).

4. Connect the black wire of the power supply unit to the negative supply wire (0V).

5. No earth connection is required.

6. Once all electrical connections are made, locate the terminal block in the base by
fitting on the pegs.

7. Fit the power supply unit to the base ensuring that the wires sit in the base and do
not get trapped. Ensure that the power supply clip makes correctly and then tighten
the securing screw.

Important: The power supply securing screw must be tightened

to ensure electrical safety.

Once all electrical connections have been made, fit the power supply unit to the base.
Ensure that the power supply clip fits correctly and then tighten the securing screw.

Important: The power supply securing screw must be tightened to ensure electrical

safety.

BACKUP
BATTERY

POWER SUPPLY

SECURING SCREW

POW ER S U P PLY UN IT

C. Fitting the Module and Turning On.

All SF340 models

The sensor module SF340M is used for all the SF340 series units. Simply fit the Module to the
installed base and power supply unit and gently push down until it clips into place. The red alarm
light will illuminate for approximately 10 seconds when the module is fitted.

Note: The Module must have the backup battery fitted for the alarm to operate correctly.
This applies even if the primary power supply is present (230Vac, 12Vdc or 24Vdc as
appropriate). If no battery is fitted or the battery is flat the audible alarm will sound
continuously when the unit is installed and the primary power source is switched on.

Fit the outer cover of the unit by pushing until the clips at either end hold the cover in place.
Turn on the electrical supply. Check that the green power light illuminates and the red alarm lamp

flashes briefly once every minute. Push the test button and hold until the audible alarm signal is
given. The unit is now ready and working.

9. HOW DO I REPLACE THE SENSOR MODULE?

All SF340 models

Remove the outer cover of the unit by gently pushing in the clips at either end. Remove the
module fixing screw (if fitted) and unclip the Module from the installed base and power supply unit.
The replacement Module can simply be clipped into the power supply unit and the fixing screw
replaced if used.

Note: The Module must have the backup battery fitted for the alarm to operate correctly.
This applies even if the primary power supply is present (230Vac, 12Vdc or 24Vdc as
appropriate). If no battery is fitted or the battery is flat the audible alarm will sound
continuously when the Module is fitted.

Push the test button and hold until the audible alarm signal is given and the red light flashes. The
unit is now ready and working.

10. BATTERIES

Only the following batteries are suitable replacements for the SF340M backup battery:
Duracell MN1604 Rayovac A1604 Gold Peak 1604A Energizer 6LR61/522
To replace the backup battery, remove the Module from the unit (see section 9), unclip the battery

and replace with a fresh battery. Refit the Module and outer cover to the unit and push and hold
the test button until the audible alarm signal is given and the red light flashes.

11. WHAT SHOULD I DO IF MY ALARM SOUNDS?

If your alarm sounds, please proceed as follows:

! Open all doors and windows to ventilate the area and allow the carbon monoxide to disperse.
! Where possible turn off all fuelled appliances and stop using them.
! Evacuate the property leaving the doors and windows open.
! Ring the gas or other fuel supplier on their emergency number and explain the problem.

Keep their number in a prominent place.

! Do not re-enter the property until the alarm has stopped.
! Get medical help immediately for anyone suffering from the effects of carbon monoxide

poisoning such as, headache, nausea etc and advise that carbon monoxide poisoning is
suspected.

! Do not use the appliances again until they have been checked by an expert and the fault

located and cleared. In the case of gas appliances this should be a CORGI registered installer.

EMERGENCY TELEPHONE NUMBER

7. SF340 SERIES FEATURES

All units are powered by a primary power source (e.g. 230V or 12/24Vdc) and contain a replaceable
Module which houses the battery backup and gas sensing systems.

POWER LIGHT (all SF340 models)

The green power light will illuminate when the primary power source is connected and working
(230V or 12/24Vdc according to model). This light will illuminate even when the Module is not
fitted.

ALARM/CONFIDENCE LIGHT (all SF340 models)

In normal operation the red light will flash once per minute to indicate that the unit is operating
correctly. This light will flash whether the Module is powered from the primary power source or the
battery backup. In the alarm condition it will flash five times per second.

AUDIBLE ALARM (all SF340 models)

In the alarm condition the buzzer will sound. Models SF340E, SF340G and SF340H will sound the
Morse Code signal for ‘CO’ (– • – • – – –). Models SF340F and SF340J will give a continuous
buzzer sound and this will continue for 90 seconds after the alarm light has stopped. Where
models SF340F and SF340J are interconnected, all units connected will sound the continuous
alarm signal. Only units in alarm will have a continuously flashing alarm light.

BATTERY BACKUP (all SF340 models)

All models in the SF340 series have a battery backup feature. This powers the alarm in the event
of a primary power failure (230V or 12/24Vdc according to model).

TEST BUTTON (all SF340 models)

All models in the SF340 series have a test button. This is positioned on the front of the unit and
when pushed will cause the audible and visual alarm signals to be given. If the relay and interconnect
options are used, these will also operate when the test button is pressed. Note that for models
SF340F and SF340J the buzzer will sound and the relay will operate for 90 seconds.

RELAY OUTPUT (Models SF340F & SF340J)

The relay provides a single pole changeover (SPCO) volt free contact which can be used to signal
to a control panel or switch an external siren or gas valve. The relay contacts are rated at
3A / 230Vac and will change state when the unit goes into the alarm condition or when the test
button is pressed. When the unit comes out of the alarm condition the relay will automatically
revert to its original state after a delay of 90 seconds.

INTERCONNECT (Models SF340F & SF340J)

The interconnect facility enables up to 20 SF340F or SF340J alarms to be connected together. If
one unit goes into the alarm condition the audible alarm on all interconnected units will sound.
This alarm signal is a continuous tone. The unit that caused the alarm can be identified as it will
be the only one with a continuously flashing alarm light. When the unit comes out of the alarm
condition the alarm light will stop giving the alarm signal. After a delay of 90 seconds the buzzers
of all interconnected units will stop sounding and the relays will reset.

Model SF340J

1. The SF340J must be supplied from a 12Vdc or 24Vdc supply. No external fuse is
required since a fuse is incorporated in the unit.

2. Connect the positive supply wire (+12Vdc
or +24Vdc) to the appropriate terminal
marked on the connection board fitted to
the base of the unit.

3. Connect the negative supply wire (0V) to
the terminal marked 0V.

4. No connection must be made to the supply
earth.

(Refer to following section for Relay and Interconnect Connections)

RELAY CONNECTIONS (Models SF340F & SF340J only)

The relay connections are made using the terminal block on the connection board marked

RELAY O/P. Connections to the relay volt free contacts are as follows:

N/C – Normally closed
COM – Common
N/O – Normally open

The relay contacts are rated at 3 Amps / 230Vac.

INTERCONNECT CONNECTIONS (Models SF340F & SF340J only)

The interconnect system is made using the terminal block on the connection board marked

INTERCONNECT. Units are connected in series as follows,

I/C - Connect to I/C terminals of other SF340F or SF340J alarms
I/C 0V - Connect to I/C 0V terminals of other SF340For SF340J alarms

A maximum of 20 units can be interconnected.

ALARM 1 ALARM 2 ALARM 3

INTERCONNECT

RELAY OUTPUT

POWER INPUT

FUSE
500mA
250V

INTERCONNECT

RELAY OUTPUT

POWER INPUT

FUSE
500mA
250V