Merlin CO2 Monitor
Product Data Sheet
S&S Northern Ltd
3
1
General information
The Merlin CO2 AVG Monitor has an LCD display to show the user a clear and precise
reading of the CO2 level in the room and average CO2 level over the past 24 & 8 hours. The
monitor also provides statistics for the highest reading over the past 24 hours along with a
traffic light colour system indicating the air quality in the area.
2
Features
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-hour average and highest CO2 level within the last 24hrs.
240v AC Main Powered.
Terminal outputs to control mechanical air ventilation.
Complies with the Scottish Technical Handbook October 2015 requirements for CO2
monitoring with domestic dwellings
2 Year Warranty
Made in Britain
3
Installation
3.1
Mounting the CO2 Sensor
The control panel is designed for surface mounting using
2 mounting screws. Removing the back plate gives access to the circuit board. Do not attempt
to remove the PCB.
3.2
Mains Supply
A 230-volt electrical supply should be supplied to the panel. This should be
externally fused at 3 Amps using a fused spur and should be connected to the terminals marked
‘LN
Power
’.
3.3
Alarm Relay
This will switch over should the level of CO2 rise above 700ppm, and
automatically switch back once the levels have dropped below 650ppm.
3.4
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.
4
Operation Instructions
4.1
How to turn the system on and off
1. To turn on the Merlin CO2 AVG
monitor you need to supply 230V into the “L & N POWER”
terminal, 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.
2. To turn off the Merlin CO2 AVG monitor you need to turn the power supply to the panel off or
disconnect the fuse spur.
4.2
Explanation of LED status
4.2.1
Moderate (Amber) LED
Amber - Moderate air quality, 700ppm> CO
2
<1000ppm
4.2.2
Poor (Red) LED
Red - Poor air quality, 1000ppm< CO
2
