Duomo CO100Ar User manual

CO100Ar Sensor
Application
Duomo is recognised within the gas industry for
providing a comprehensive range o ow cost, high
reliability gas detection for many applications. We
have installed and commissioned natural gas and
carbon monoxide sensors in applications such as
boiler rooms, kitchens, car parks, aircraft hangers,
factories and shopping centres. The CO100Ar
constantly monitors the carbon monoxide levels in
its environment. The electrochemical sensor
technology provides c detection of carbon
monoxide. Rugged construction and IP55 protective
rating make this unit ideal for damp conditions such
as car parks. The CO100Ar can be used as a stand
al one int rumen t or can be connecte d to the
BX444M, GS300M, GS100M and BX150 controllers. A
20mA signal will be derived from the device when
alarm thresholds are reached. These are 300ppm
instantaneous alarm, 100ppm alarm in 10 minutes,
30ppm alarm in 12 hours.This device, in conjunction
with the above mentioned controllers can be used
to control gas valves, sirens or air extract systems.
Operation
The CO100Ar is a carbon monoxide sensor which
provides both a linear 4 - 20mA output and a time
weighted average output. The sensor automatically
calculates carbon monoxide concentration relative
to time (Time Weighted Average) and will give a
20mA output from terminal 3 should the carbon
monoxide levels remain above predetermined
levels for extended periods. This is useful when
carbon monoxide levels are likely to drop rapidly
when extract fans are boosted. Thus the TWA
threshold may not be reached but an indication of
actual carbon monoxide levels is required for BMS
and ventilation interfacing. The unit also has volt-
free relays for sensor fault, CO alarm level (at
300ppm) and a time weighted average alarm.
12 - 24V DC supply
IP55 protective rating
IP65 sintered head
Electrochemical sensor technology
4 - 20mA linear output and TWA
CE cer d No. 96125
BS EN50291 Compliant
3 year guarantee (from date of
manufacture)
i
CAUTION! Carefully read the following instructions
prior to installation of this device. Always keep this
pamphlet for future reference. Ensure that the gas
detection system is wired correctly and is only used
for the purpose for which it is intended.
DO NOT TEST THIS SENSOR WITH ANYTHING OTHER THAN DUOMO
TEST GAS, 350ppm CARBON MONOXIDE IN AIR. Concentrations
above this will damage the sensor and shorten sensor life.
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Overall Dimensions
Positioning Sensors InstallingASensor
Carbon monoxide has specic gravity of 0.97 and is therefore
slightly lighter than air.
However for positioningpurposes, at the concentrations of
carbon monoxide relating to the detector alarm thresholds, the
resultant combination of carbon monoxide and air will neither
rise or fall.
The best position to mount the CO100Ar is 1.6m above ground
level. The image below shows the suggested position for the
CO100Ar in a boiler room.
For car parks, 1.6m above ground level is still recommended.
If you require assistance regarding locating sensors please call
our Droitwich factory on [phone] or faxadrawing of
your application to [phone]and we will advise
accordingly.
The sensors must be mounted as shown below with
the sintered head pointing vertically down.
Important Notes
The installation of this gas detector does not release
theuser from observingallthe regulations
concerningthecharacteristics, installationandthe
use of gasappliances;the ventilation of the
environmentandtheelimination of combustion
products in accordance with local recommendations,
regulations and byelaws.
For any damage caused to people, property or
animals resulting from incorrect connection,
installation or application of this gas detector Duomo
will not be held responsible or liable.
1600
Replacing Sensor
When replacingsensorsNEVER seperateasensing
head from the PCB. The sensor has been calibrated
using only that particular board and therefore will not
function correctly with any other.
Carbon
Monoxide
Model
CO100/A plus
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
Model
CO100/A plus
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
100mm
100mm
60mm
80mm
80mm
Fixing 6.5O
Model
CO100/Ar
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
Model
CO100/Ar
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
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In Case Of Alarm
Typical Wiring Schematic for GS300M & CO100Ar
Ph N12
111098
7
6
5
4
SENSOR 1
254
3
1
FAULT
RELAY
PRE-
ALARM
NO. 1
MAIN
ALARM
RELAY
PRE-
ALARM
NO. 2
NC NCNCNC
NO NONONO
CCCC
Note:
Connections for other detectors may differ.
Check detector datasheet wiring schematic.
1mm2 CSA cable only
12 V
BATTERY
(IF STANDBY
BATTERY
REQUIRED)
Key
Gas Valve
Audible
alarm
67
SENSOR 2
123
SENSOR 3
Extinguish any naked flames.
Do not switch lights or electrical devices on or off.
Open all windows and doors to increase ventilation.
If the audible alarm changes from continuous to
intermittent the levels of gas have dropped. A
responsible, qualified person is now safe to find the
cause of the alarm.
If the alarm sound remains constant, and the cause
is not evident or possible to eliminate turn off the
emergency isolation valves to the area and contact
your gas provider emergency line. They will advice
accordingly.
123
123
54678
FAULT
RELAY
ALARM
RELAY
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TWA Alarm Reaction Times
Carbon Monoxide Exposure
CO concentration
30ppm
50ppm
100ppm
300ppm
Alarm after
120 mins.
60 mins.
10 mins.
<1 min.
Diagram of Detection
SymptomsCO concentration
5000ppm
1500ppm
800ppm
400ppm
250ppm
150ppm
Death in 20 minutes
Death in 2 hours
Convulsions in 30 minutes
Bad headache in 30 minutes
Headache in 2 hours
Headache in 3 hours
0
0
5
10
20
25
15
50 100 200 300150 250 350
17.3
20
14.6
12
4
6.7
9.3
Level of Carbon Monoxide (ppm)
TWA Output (mA)
3/5A
Power
Supply 230V
AC
N

Technical Specifications
Power supply 12-24V DC +/- 10% from detector
Electrical input 50mA @ 13.8V
External protection rating IP55
Linear output 4mA @ 0ppm, 20mA @ 300ppm
Working temperature -15oCto40
oC
Sensor type Electrochemical
Detection precision +/- 10% of detected level
CE certification No. 96125
Detection 0 to 300ppm
Response time <10 seconds
Interconnecting cable size 1mm csa
Material used for housing Aluminium
Dimensions 100 x 130 x 60
Function check period 6 months
Guarantee 3 years
Commissioning
It is strongly recommended that this sensor should be commissioned by Duomo Commissioning Engineers or
engineers approved by Duomo to carry out this work. A quotation for commissioning or service will be
provided upon request.Contact our service department by;
Telephone - 01905 797989 Fax - 01905 774296 Email - [e-mail]
The benefits of this equipment being commissioned by Duomo are:
The 3 year guarantee period will start from the date of commissioning and not from the date of manufacture
On board spares.If for whatever reason this equipment doesn't function correctly Duomo engineers will
carry spares to ensure that the commissioning is successful
A Duomo Commissioning Certificate is provided
It is prudent to make electrical connection to the sensor terminal plug when withdrawn and leave the plug
disconnected from the sensor so that the Duomo Engineer is the first to power up the unit on site. This allows
wiring to be checked prior to commissioning and avoids damage due to incorrect connection. Guarantees for
this product will become void if damage is caused by the installer.
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Electrical Installation
If the CO100Ar is to be used to monitor possible leakage of carbon monoxide in boiler rooms due to spillage or
damaged or unsuitable flue systems, it is advisable to connect the sensor directly to a Duomo gas control panel.
These are safety devices and are designed to give audible alarms and automatically provide latched electrical
isolation of associated gas safety shut off valves.
The CO100Ar is also suitable for carbon monoxide sensing in car parks and can be connected either to Duomo
gas control panels or to Building Management Systems (BMS). The sensor can be located up to 100m from the
gas detector. Cable size should be 1mm csa. If the sensor cables are run seperately in specific conduit it is not
essential to use screened cable.
However, if the cables are routed through conduit or trunking containing other wiring the use of screened cable
is advisable. The wiring should be performed by a qualified person in accordance with current regulations. The
plug in terminal rail makes installation easy and quick.