S&S Northern Merlin CO2 AVG Monitor User manual

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 1
Gas Safety Products
Merlin CO2AVG Monitor
Carbon Dioxide Monitor
User Guide
Please read this guide carefully and retain for future use.

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 2
Table of contents
1General Information..........................................................................................3
2Features..............................................................................................................4
3Installation & Location.......................................................................................4
4Circuit Board......................................................................................................4
5Power On and Off..............................................................................................5
6LED Status ...........................................................................................................5
7CO2Averages....................................................................................................5
8Maintenance .....................................................................................................6
9Manufacturer’s Warranty ..................................................................................8

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 3
1General Information
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.
Your device will also provide 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 along with a traffic light colour system indicating the air quality in
the area.
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).
Important Warning Statements
It is recommended that this unit be commissioned upon installation and serviced annually.
The expected life time of the detector/sensor element is: 10 Years.
Do not apply lighter gas to the detector –this will cause extreme damage.
Never ignore your device when in alarm.
This device requires a continual supply of electrical power –it will not work without power.
The unit should be stored in cool, dry conditions.
Avoid Installation near any ventilation openings, i.e. vents, chimneys, windows etc.
Avoid installation near ceiling fans, windows or areas exposed to direct weather.
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.
Information on waste disposal for consumers of electrical & electronic equipment. (EEE)
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.

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 4
2Features
Clear digital readings of the live CO2 levels.
LED warning lights when the CO2 levels increase.
Push button on the fascia to display the 24 hr CO2 average, which is updated every 10
minutes along with the previous 8-hr average and highest level within the last 24hrs.
100-240VAC mains powered.
Terminal outputs to control mechanical air ventilation.
Manufactured in Great Britain
3Installation & Location
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 (PCB).
Do not attempt to remove the Circuit Board! This will void any warranty you may hold.
Recommended Installation Locations
Unless otherwise indicated by the manufacturer, a carbon dioxide monitor, with or without an
integral detector, should be mounted between 1.4m and 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.
During the first 24 hours of installation, the unit will continue to adjust its calibration to the
ambient CO2. During this time, you may notice slight variations in the PPM readings of CO2
displayed on the monitor.
4Circuit Board
1. POWER (LN)
A 100-240VAC electrical supply.
This should be externally fused at 3
Amps.
2. PRE-ALARM Relay
This will switch over should the level
of CO2 rise above 1000ppm, and
automatically switch back once
the levels have dropped below
950ppm.
3. ALARM Relay
This will switch over should the level of CO2 rise above 1300ppm, and automatically switch
back once the levels have dropped below 1250ppm.

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 5
5Power On and Off
How to turn your device ON
To turn on the Merlin CO2 AVG monitor you need to supply mains power, this will then illuminate
the blue LCD screen and initiate a 60-second countdown.
When the countdown is complete, the LCD screen will show CO2 levels in the room.
How to turn your device OFF
Remove or Switch Off the mains power supply.
6LED Status
Med
Amber - Moderate air quality, 1000 - 1300ppm
High
Red - Poor air quality, >1300ppm CO2
7CO2Averages
By using the average push button located on the front fascia of the Merlin CO2 AVG, the user is
able to navigate through four different display screens showing the following statistics:
Current CO2 PPM level Reading
Average CO2 Reading over the previous 8 Hour Period
24 Hour Average CO2 Reading
Highest CO2 Reading over the previous 24 Hour Period

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 6
8Maintenance
To keep your device in good working order, you must follow these steps:
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.

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 7

Merlin CO2 AVG Monitor User Guide
Rev: 09 05-19 8
9Manufacturer’s Warranty
3 Year Limited 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.
CONTACT US:
S&S Northern Head Office
Tel: [phone]
Fax: [phone]
www.snsnorthern.com
[e-mail]
South East Division
Tel: [phone]
Fax: [phone]
[e-mail]
S&S Northern is the owner of this document and reserves all rights of modification without prior notice.