Duomo CO200 User manual

CO200 Duct Sensor
Application
Duomo is recognised within the gas industry for
providing a comprehensive range of low 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 CO200 Duct is
an intelligent electronic device which constantly
monitors carbon monoxide levels. The
electrochemical sensor technology provides specific
detection of carbon monoxide. Rugged
construction and IP55 protective rating make this
unit ideal for damp conditions such as car parks. The
CO200 Duct can be used as a stand alone intrument
or can be connected 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 CO200 Duct is a carbon monoxide sensor which
provides a linear 4 - 20mA 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.
12 - 24V DC supply
IP55 protective rating
Electrochemical sensor technology
4 - 20mA linear output and TWA
CE certified No. 96125
EN50291 for toxic gas
3 year guarantee
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 Installing A Sensor
Carbon monoxide has specific gravity of 0.97 and is therefore
slightly lighter than air.
However for positioning purposes, 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 CO200 Duct is 1.6m above
ground level. The image below shows the suggested position
for the CO200 Duct 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 fax a drawing 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
the user from observing all the regulations
concerning the characteristics, installation and the
use of gas appliances; the ventilation of the
environment and the elimination 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 replacing sensors NEVER seperate a sensing
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
100mm
100mm
60mm
80mm
80mm
Fixing 6.5O
Model
CO2000lus
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
Model
CO200
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
Model
CO200
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
Model
CO200
Power Supply
12/24V. dc± 10%
Electrical Input
110mA@13,8V.
Detection
Carbon Monoxide
Sensitivity
from 30 to 300ppm
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Typical Wiring Schematic for GS300M & CO200 Duct
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
123
123
54678
FAULT
RELAY
ALARM
RELAY
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In Case Of Alarm
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.
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 110mA @ 13.8V
External protection rating IP55
Working temperature -10oCto40
oC
Sensor type Electrochemical
Detection precision 1% full scale
CE certification No. 96125
Detection 0 to 300ppm
Response time < 10 seconds
Interconnecting cable size 1mm csa
Material used for housing Aluminium
Dimensions 75 x 158 x 58
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.
Electrical Installation
If the CO200 Duct 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 CO200 Duct 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.
w: www.duomo.co.uk - e: [e-mail] - t: 01905 797989 - f: 01905 774296 | ©Duomo (UK) Ltd. 2007