Duomo CellAir User manual

Thankyou for selecting the Duomo CellAirTM CO2
monitor. It is designed to detect the presence of
carbon dioxide in the ambient air to protect people
in confined spaces. High concentrations of CO2in
confined spaces are dangerous, and may lead to
health problems ranging from headaches and
fatigue to asphyxiation and death. CellAirTM has an
audible alarm and visual indication which will
activate when CO2concentration reaches a pre-set
level. Detection of high levels of CO2will also
activate a relay that could be used for a fan to
ventilate the confined space and reduce CO2
concentration in the area. CellAirTM can be widely
used in CO2storage areas, breweries, wineries,
cellars, beverage dispensing areas and fast food
outlets.
CO2Specification
Measurement range - 0 - 50,000ppm
Accuracy - ±100ppm or ±5% of reading
Temperature Specification
Measurement range - 0oC - 50oC (32oF - 122oF)
Alarm Levels
Alarm 1 - 0.5 / 1 / 1.5 / 2%
Alarm 2 - 1.5 / 2 / 2.5 / 3 / 3.5 / 4%
Operating Conditions
Operating temperature - 0oC - 40oC (32oF - 104oF)
Humidity range - 0 ~ 95%RH
Storage Conditions
Storage temperature - -20oC - 60oC (-4oF - 140oF)
Power Supply & Relay Output
AC adapter - 110/220 VAC
AC input - 100 ~ 240 VAC, 50/60Hz
AC output - 6 VDC, 1.8 W
Relay output - 30 VDC or 250 VAC, max. 2A, SPST, NO
Accuracy
Annual drift < 20ppm / year @ 400ppm
Calibration
User calibration via onboard menu system
Recommended calibration interval - 2 years
NDIR (Non-Dispersive Infrared) sensor
Measures up to 50,000ppm
Can handle up to 3 remote display units;
1 up to 25m away, 3 up to 8m apart
Large LCD display indicates ambient
CO2concentration and temperature
Relay output to automatically control
a fan to ventilate confined spaces
Audible and visual alarm indications
IP54 water proof protection
Application Specifications
Package Contents
SEU (Sensor Unit), RDU (Remote Display Unit), panel
holders, network cable connector, communication
cable (8m length), fixtures and fittings, user manual.
CellAirTM CO2Detector
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The RDU (Remote Display Unit) should be placed outside the room which is being monitored. This unit is
connected to the SEU by the communication cable provided. It should be placed where it can be conveniently
seen before entering the room where the SEU is located. The RDU is a repeater and displays the measurements
made by the SEU on an LCD.The RDU can be placed a maximum of 24 metres (78.7 feet) away from the SEU.
The RDU also has the "DIAG" function to test the comms between the SEU and the RDU.
The SEU should be placed in a room where the CO2is likely to accumulate such as a room where CO2is stored,
like an area with CO2beverages.The large LCD displays the ambient CO2concentration and the temperature.
The SEU has several functions.These are;
"DIAG" - Performs a communication test between the SEU and RDU.
"CALI" - Calibrates the unit to the ambient air.
"ReFactSet" - Restores the unit to its factory default settings.
"AL1"- Sets the 1st alarm level to 0.5, 1, 1.5 or 2% CO2concentration (default is 1.5%).
"AL2" - Sets the 2nd alarm level to 1.5, 2, 2.5, 3, 3.5 or 4% CO2concentration (default is 3%).
When CO2concentration exceeds the first alarm level, the red AL1 LED will blink and the alarm will sound
intermittently. At this stage, the relay will be actuated. When levels drop back below the alarm level, the LED will
stop blinking and the alarm will stop sounding.
When concentrations exceed the second alarm level, both AL1 and AL2 LED's will flash and the alarm will sound
more quickly.The alarm will remain in this state until the button has been pressed.
In the case of very high concentrations, 'ESC' will appear on the screen of the unit. It is imperative that the area be
completely ventilated and that no one enters the area until concentrations have dropped. To reset the unit, use
the "ReFactSet" function.
SEU (Sensor Unit) Function Instruction
RDU (Remote Display Unit) Function Instruction
Please handle the device carefully; do not subject the product to impact or shock.
Do not place the unit, or the adaptor, near a heat source.
Do not touch the exposed electronic circuitry of the device under any circumstances.
Please only use the included power adaptor.
Make sure that the power adaptor is mounted using the plug lock so that it cannot be removed without the
use of tools.
DO NOT enter the room when "ESC" is displayed on the LCD of the SEU or RDU. Some action must be taken
before entering the room where the SEU is installed.
Warning: To ensure this product is used correctly and safely, please read these warnings and the entire user
manual before use.
Safety Notes
We recommend that users test the communication between the SEU and RDU using the "DIAG" function
periodically. If the four LED's flash and the alarm sounds on both units then the system is functioning normally.
Maintenance
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1.
2.
3.
4.
5.
6.

Fault Codes & Troubleshooting Guide
LCD Display Symbols
LCD Fault
Icon Description SEU
Indication
RDU
Indication Suggested Action
Er3
The ambient temperature has
exceeded the temperature
range (0oC - 50oC)
"Er3" flashes,
Fault LED
flashes, Alarm
sounds
"Er3" flashes,
Fault LED
flashes, Alarm
sounds
This error will disappear when
the temperature returns to
within the acceptable range
Er4
There is an incorrect
measurement or the sensor
has exceeded its lifespan
"Er4" flashes,
Fault LED
flashes, Alarm
sounds
"Er4" flashes,
Fault LED
flashes, Alarm
sounds
Power the unit down, then back
up. If "Er4" still appears, please
return the unit to the dealer
The accuracy of the CO2
sensor may deviate from the
actual CO2concentration
"Er8" flashes,
Fault LED
flashes, Alarm
sounds
"Er8" flashes,
Fault LED
flashes, Alarm
sounds
Power the unit down, then back
up. If "Er8" still appears, please
return the unit to the dealer
EEPROM
System problem
"Er5" & "Er6"
flash, Fault LED
flashes, Alarm
sounds
"Er7" flashes,
Fault LED
flashes, Alarm
sounds
Power the unit down, then back
up. If "Er5" & "Er6" still appears,
please return the unit to the
dealer
Internal data transmission
error
"Er7" flashes,
Fault LED
flashes, Alarm
sounds
"Er7" flashes,
Fault LED
flashes, Alarm
sounds
Power the unit down, then
back up. Check the
communication cable
between the SEU and RDU
Er5
Er6
Er7
Er8
CO2concentration (ppm) Ambient CO2concentration
Temperature (Celcius or Fahrenheit) Ambient temperature
Alarm The unit is in alarm
Diagnostic check The communications between the
SEU and RDU are being checked
First alarm
level
CO2concentration exceeds the
first alarm level.The relay has been
activated
Second alarm
level
CO2concentration exceeds the
second alarm level.DO NOT
ENTER THE ROOM.
Calibration Calibrates the CO2sensor based on
ambient CO2concentration
Restore factory setting Recovers factory default settings
Escape The CO2level is above the second alarm
level. Action must be taken.
High concentration The CO2 concentration is above 5%
MeaningSymbol Description
CALI
ReFactSet
DIAG
AL1
AL2
PP M
CO2
c
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Choose a suitable location to install the SEU.Fix the panel holder on the wall at the recommended height of
about 0.45m (1.5 feet) from the floor and as close to the manifolds and valves as possible.
Put the SEU on the panel holder,making sure the connection is tight.
Fix another panel holder in a suitable location outside the monitored space. Push the RDU onto the panel
holder and stick the warning paper next to the RDU.
The communication cable is pre-wired to the SEU.Route this through to the RDU and plug it into the input
port.Communication between the two units is now established.
The CellAirTM has one relay output which is pre-wired to the SEU.The relay can be used to operate an external
alarm system or ventilation system.It will be triggered when the CO2concentration exceeds the first alarm
level.
After completing the installation,remove the rubber cap from the gas entry point,power the unit up and use
the "DIAG" function to verify the connection between the SEU and the RDU.
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2.
3.
4.
5.
6.
Temperature oC/oF
Setting the second alarm parameter
Using the "DIAG" function
Using the "CALI" function
Setting the first alarm parameter
Using the "ReFactSet" function
There are several settings on the CellAirTM that can be altered to personalise it for your application.
1.Press the button to switch between oC and oF
Installation Instructions
Customising Settings
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1.Press the button until "DIAG" flashes
2.Press ,the four LED's on the SEU will flash and
its alarm will sound
3.The four LED's on the RDU will flash and its alarm
will sound
1.Press button until "AL1" flashes
2.Press ,the "AL1" icon shown on the LCD
3.Press to go through the parameters
4.Press again to save the setting
1.Press button until "AL2" flashes
2.Press ,the "AL2" icon shown on the LCD
3.Press to go through the parameters
4.Press again to save the setting
Note: The second alarm level should be higher than
the first alarm level.
Note: If possible,calibrate the SEU outside in ambient
air. Wait 10 minutes for the unit to stabilise before
calibrating.DO NOT breathe on or near the unit during
calibration.
1.Press button until "ReFactSet" flashes
2.Press ,then to select either "Yes" or "No"
3.Press again to save the setting
Press button until "CALI" flashes
Press ,the "CALI" icon shown on the LCD
Press and hold for at least 10 seconds.The "CALI"
icon will flash and the unit will calibrate
automatically. After 10 minutes the LCD will
display "Pass" or "Fail". If "Fail" appears please try
calibrating the unit again.
1.
2.
3.
Only use this function if you wish to return the sensor
to its factory default settings, or if the unit displays
"ESC" on the LCD under conditions of very high
concentrations.
PP M
CO2
c
PP M
CO2
F
PP M
CO2
c
PP M
CO2
c
DIAG DIAG
PP M
CO2
c
PP M
CO2
c
CALI CALI
PP M
CO2
c
PP M
%
CO2
c
AL2 AL2
PP M
CO2
c
PP M
%
CO2
c
AL1 AL1
PP M
CO2
cCO2 c
ReFactSet ReFactSet ReFactSet CO2
c

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The diagram below details a typical installation scenario of the CellAirTM unit. For advice on where and how to
install this unit please contact Duomo (UK) Ltd. on 01905 797989.
OK AL1 AL2 FLT
Input
Input Output Output
33.4mm85mm
117.5mm
<1000PPM
>1000PPM
>5000PPM
>1.50%
>3.00%
>4.00%
>5.00%
Acceptable and comfortable CO2level
Complaints of stiffness and odors,generaldrowsiness
Feel headache,sleepy,dull,loss of concentration
Respiratory problems and increased heart rate
Muscular pains,unconsciousness and spasms
Immediate danger of serious injury or death
Convulsions,instant paralysis and death
ReFactSet:Chooseyes to recover factory setting.
DIAG:To verify the communication function.
CALI:Press&hold for 10s to calibrate outside.
Press to again to save setting
Press to adjust setting.
Once mode is selected,press to this mode.
Press to scroll throughadjustment modes,
46.6mm124.8mm
167.7mm
A. LCD display
B.FLT LED (Fault indication)
C. AL1 LED (Alarm 1)
D. AL2 LED (Alarm 2)
E. OK LED (Power indication)
F. Reset button
G. Mode button
H. Enter button
I. Communication cable
to RDU
J. Relay output
K. Power supply
L. Rubber cap
M. Gas entry
O. OK LED (Power indication)
P. AL1 LED (Alarm 1)
Q. AL2 LED (Alarm 2)
R. FLT LED (Fault indication)
S. LCD display
T. Enter button
U. Mode button
V. RJ45 plug for SEU (Input)
W. RJ45 plug for next RDU
(Output)
A
B
C
D
E
S
T U
F
G
H
IJK
Q RPO
WV
L
M
<1000PPM
>1000PPM
>5000PPM
>1.50%
>3.00%
>4.00%
>5.00%
AcceptableandcomfortableCO2level
Complaintsofstiffnessand odors,generaldrowsiness
Feelheadache,sleepy,dull,lossof concentration
Respiratoryproblemsandincreasedheart rate
Muscularpains,unconsciousnessandspasms
Immediatedanger of serious injuryordeath
Convulsions,instantparalysisand death
ReFactSet:Chooseyesto recoverfactory setting.
DIAG:Toverifythe communicationfunction.
CALI:Press&hold for10s to calibrate outside.
Press to againto save setting
Press to adjust setting.
Oncemode is selected,press to this mode.
Press to scroll throughadjustment modes,
OK
AL1
AL2
FLT
RDU Repeater
SEU (Sensor unit)
Fan for
ventilation Power
supply
Power
supply
for fan
Installation
Layout & Dimensions