S&S Northern Merlin CO2 AVG User manual

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 1
CO2Sensor AVG TFT
Carbon Dioxide Gas Monitor

Installation & Operation Manual
Please read this manual carefully and retain for future use.
The CO2sensor AVG TFT is carefully designed and tested to monitor levels of carbon dioxide (CO2) in the
air and used in areas where CO2could be a concern. The information contained within should be
referenced for typical installation and operation only.
For site specific requirements that may deviate from the information in this guide –contact your supplier.

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 2
Content
INSTALLATION .........................................................................................3
Planning.........................................................................................................................3
Typical Positioning .......................................................................................................3
Wiring .............................................................................................................................4
Specification ................................................................................................................4
OPERATION ..............................................................................................5
First Power Up ...............................................................................................................5
Screen Explanation .....................................................................................................5
Screen Brightness.........................................................................................................5
End of Life......................................................................................................................6
General Maintenance ...............................................................................................6
IMPORTANT WARNING STATEMENTS ...................................................7
Manufacturer’s Warranty...........................................................................................7

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 3
INSTALLATION
Planning
Your new CO2sensor is carefully designed and tested to monitor levels of carbon dioxide (CO2)
in the air and used in areas where CO2could be a concern.
The device will measure and display the CO2value in ppm (parts-per-million) with digital
display indications. This data is refreshed every 3 seconds.
Your device will also monitor, record and display the average concentration of carbon dioxide
over an 8 and 24 hour period also giving you the maximum concentration recorded over 24
hours. This data is refreshed every 10 minutes.
The information contained within this guide should be referenced for typical installation and
operation only. For site specific requirements that may deviate from the information in this
guide –contact your supplier.
Carbon Dioxide Gas
Carbon dioxide (Chemical formula-CO2) is a colourless gas with a density about 60% higher
than that of dry air. It occurs naturally in earth’s atmosphere as a trace gas where the natural
concentration is about 0.04% (410ppm).
Typical Positioning
A carbon dioxide monitor requires a free flow of air to operate correctly, it should therefore not
be located in a space that is likely to restrict the free movement of air.
a) Avoid positioning near draft areas i.e. doorways, windows and ventilation openings as this
may give the occupant false CO2readings.
b) Avoid obstructions such as furniture, blinds and curtains etc.
c) Mount between 1.4 –1.6m above floor level. A carbon dioxide detector head (or monitor if
integrated) should not be sited within 1m of the expected location of a bed-head.
If you are in doubt or require further information, contact us.

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 4
This device is designed for surface mounting using 2
mounting screws (not supplied) and MUST be installed by a
competent person. Mark the location of the two holes
needed on the wall using the back plate as a template.
Removing the back plate gives access to the circuit
board.
Do not attempt to remove the Circuit Board!
This will void any warranty you may hold.
There are also two pre-fractured areas for wiring access.
Wiring
A 240VAC Live and Neutral electrical supply should be
connected to the terminal marked [POWER] as shown.
This should be externally fused at 3 Amps.
When mains supply is connected, the device will power up for
60 seconds and CO2levels will then be displayed.
Specification
Power Supply
100-240VAC, 50-60Hz (Max 1.7 VA without load)
Target Gas Sensor Type
NDIR: Intelligent Infrared CO2 Module
Digital Display Type
Thin Film Transistor (TFT)
Typical Sensor Measuring Range
Accuracy @ 25 C (77 F)
400 ~ 5000ppm
± 50ppm ± 3% reading value
CO2 Signal Update
Every 3 seconds
Average/24hr Max Signal Update
Every 10 minutes
CO2 Warm Up Time
One minute / 60 Seconds
Yellow Screen Indicator
(Moderate CO2 Air Quality)
1000-1299 ppm
Red Screen Indicator
(Poor CO2 Air Quality)
1300+ ppm
Operating Conditions
-32 - 122 F; (0 - 50 C) 0 - 95%RH, Non Condensing
Storage Conditions
-32 - 122 F; (0 - 50 C)
Net Weight
202.6g
7.15oz
Dimensions
95(W)x140(H)x30(D)mm
3.7(W)x5.5(H)x1.2(D)inch

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 5
OPERATION
First Power Up
Turn your device on.
Supply 240VAC mains to the [L N POWER] terminal.
After initial warm up (60 seconds) the screen will show CO2level in the area.
Turn your device off.
Remove or Switch Off the mains power supply.
Screen Explanation
Screen Brightness
By pressing and holding the touch button for 3 seconds allows the user to select 5 brightness
modes. Hold to enter brightness mode and press to scroll through the following modes.
Auto-adjustment (device will adjust itself according to the level of light in the area).
Minimum Brightness Medium Brightness Maximum Brightness
Display screen OFF
Press the touch button to illuminate screen for 10 seconds.
If air quality reaches moderate or poor CO2status, the screen will automatically set
to Auto-adjustment mode.
Simply release the touch button and after 5 seconds the selected mode will be set.

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 6
End of Life
This indicates that the device requires immediate replacement.
The gas monitoring elements are expected to last for 10 years from initial
installation and power up depending on environmental factors.
Contact your supplier.
General Maintenance
Keep your detector in good working order follow these basic principles;
DO carefully remove any accumulated dust from the outer enclosure once a month.
NEVER use detergents or solvents to clean your device –this may permenantly or
temporarily damage the gas sensing elements.
NEVER spray air fresheners, hair spray, paint or other aerosols near the device.
NEVER paint the device. Paint will seal vents and interfere with the device.
Our CO2monitors are designed to automatically recalibrate using background CO2levels.
For maintenance purposes, our monitors should be exposed to fresh air frequently to aid with
this recalibration procedure.
High concentrations of alcohol found in many products may damage, deteriorate or affect
the gas sensing elements –such as; wine; deodorants; stain removers; thinners etc.

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 7
IMPORTANT WARNING STATEMENTS
Please take the time to thoroughly read this user’s guide which should be retained for future reference.
The expected lifetime of the gas sensor elements is 10 years upon initial power up.
The device will display a message to indicate its end of life and should immediately be replaced.
It is recommended that this device be commissioned upon installation and serviced annually.
Do not apply lighter gas or other aerosols to the device –this will cause extreme damage.
High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing elements.
This device is designed to monitor carbon dioxide gas only. It is NOT designed to detect smoke, fire or other gases and
should NOT be used as such.
Never ignore your device when in alarm.
This device requires a continual supply of electrical power –it will not work without power.
This device should not be used to substitute proper installation, use and/or maintenance of fuel burning appliances
including appropriate ventilation and exhaust systems.
This device does not prevent dangerous gasses from occurring or accumulating.
Actuation of your alarm indicates the presence of dangerous levels of CO2.
This unit may not fully safeguard individuals with specific medical conditions. If in doubt, consult a doctor/physician.
Your product should reach you in perfect condition, if you suspect it is damaged, contact your supplier.
Manufacturer’s Warranty
Warranty coverage:
The manufacturer warrants to the original consumer purchaser, that this product will be free of defects in material and
workmanship for a period of three (3) years from date of purchase. The manufacturer’s liability hereunder is limited to
replacement of the product with repaired product at the discretion of the manufacture. This warranty is void if the
product has been damaged by accident, unreasonable use, neglect, tampering or other causes not arising from
defects in material or workmanship. This warranty extends to the original consumer purchaser of the product only.
Warranty disclaimers:
Any implied warranties arising out of this sale, including but not limited to the implied warranties of description,
merchantability and intended operational purpose, are limited in duration to the above warranty period. In no event
shall the manufacturer be liable for loss of use of this product or for any indirect, special, incidental or consequential
damages, or costs, or expenses incurred by the consumer or any other user of this product, whether due to a breach of
contract, negligence, strict liability in tort or otherwise. The manufacturer shall have no liability for any personal injury,
property damage or any special, incidental, contingent or consequential damage of any kind resulting from gas
leakage, fire or explosion. This warranty does not affect your statutory rights.
Warranty Performance:
During the above warranty period, your product will be replaced with a comparable product if the defective product is
returned together with proof of purchase date. The replacement product will be in warranty for the remainder of the
original warranty period or for six months –whichever is the greatest.
Information on waste disposal for consumers of electrical & electronic equipment.
When this product has reached the end of its life it must be treated as Waste Electrical & Electronics Equipment (WEEE). Any
WEEE marked products must not be mixed with general household waste, but kept separate for the treatment, recovery and
recycling of the materials used. Please contact your supplier or local authority for details of recycling schemes in your area.

Installation & Operation Manual Merlin CO2 Monitor AVG TFT
Rev: 08 07-20 8
S&S Northern - Head Office
Tel: [phone]
Fax: [phone]
www.snsnorthern.com
[e-mail]
South East Division
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S&S Northern is the owner of this document and reserves all rights of modification without prior notice.