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Merlin
IAQ Monitor
Indoor Air Quality Monitor
INSTALLATION & OPERATION
Please read these instructions carefully before use and retain for future reference.
These instructions can also be downloaded in electronic form on the product website.
snsnorthern.com
info
snsnorthern.com
S&S NORTHERN LTD – PR7 7JN, UK Tel: +44 (0) 1257 470983 -
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Table of Contents
Related Manuals for S&S Northern Merlin IAQ
Summary of Contents for S&S Northern Merlin IAQ
- Page 1 Merlin IAQ Monitor Indoor Air Quality Monitor INSTALLATION & OPERATION Please read these instructions carefully before use and retain for future reference. These instructions can also be downloaded in electronic form on the product website. snsnorthern.com info snsnorthern.com S&S NORTHERN LTD – PR7 7JN, UK Tel: +44 (0) 1257 470983 -...
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Page 2: Table Of Contents
Merlin IAQ Monitor Installation & Operation Manual CONTENTS IMPORTANT INFORMATION ....................3 Manufacturer’s Warranty ....................3 INSTALLATION ......................4 General Information ............................4 Coverage ................................ 5 Positioning ..............................5 Mounting Instructions ........................... 5 PCB Overview ..............................5 Power Wiring ..............................6 RS-485 Wiring ............................... -
Page 3: Important Information
Merlin IAQ Monitor Installation & Operation Manual IMPORTANT INFORMATION Take extra care where this symbol is used to understand the nature of any potential hazards and how to avoid them. Before any installation, use or maintenance, read this manual carefully. -
Page 4: Installation
Merlin IAQ Monitor Installation & Operation Manual INSTALLATION General Information Failure to observe the following may cause injury to persons and/or property. Intended for indoor commercial and public areas to monitor multiple local environmental and air quality factors; temperature (°C), relative humidity (rH%), carbon dioxide (CO2), Particulate Matter levels (PM2.5) and Volatile Organic Compounds (VOC). -
Page 5: Coverage
Merlin IAQ Monitor Installation & Operation Manual Coverage It is the responsibility of the user to determine the required coverage of monitors; however, 5,400 square feet (500 square metres) per detector is a reasonable general guide therefore multiple detectors may be required to adequately monitor and protect property and/or persons. -
Page 6: Power Wiring
Merlin IAQ Monitor Installation & Operation Manual Strip cables as short as possible ensuring bare wires, e.g., wire shields, do not contact with the circuit board. DISCLAIMER: For reference purposes only. All Diagrams and Connections depend on model. Power Wiring Consider voltage drops due to cable resistance and strip the cables as short as possible ensuring bare wires, e.g., wire shields, do not contact with the circuit board (risk of short-circuit). - Page 7 Merlin IAQ Monitor Installation & Operation Manual Connect GND wire to 0V common grounding terminal. Daisy chain wires running to additional monitors – 127 sensors max per cable run. First and last device in bus requires a termination resistor. Use EOL switch to terminate IAQ sensor. Recommended 3-core, 2 twisted pair + ground, shielded cable with 120 Ω...
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Page 8: Digital Rs-485 Configuration Switches
Merlin IAQ Monitor Installation & Operation Manual Digital RS-485 Configuration Switches LABEL ACTION OPTION DEFAULT END OF LINE TERMINATION RESISTOR. Address achieved by adding binary switch values together. NETWORK 4 ON + 16 ON = ADDRESS 20 ADDRESS (Address 0) -
Page 9: Operation
Merlin IAQ Monitor Installation & Operation Manual OPERATION Air Score The air quality score allows users and facility managers to review a numerical score out of one hundred, this indicates how good the air quality is based on a calculation of CO2, PM2.5, and TVOC. The score is accessed... -
Page 10: Optional Features
Merlin IAQ Monitor Installation & Operation Manual Optional Features The IAQ monitor has the following optional features which are turned off as default but can be activated by changing the settings in the IAQ BACnet/Modbus functionality document. Audible alarm: When turned on the alarm symbol will be displayed on the screen and can be muted by touching the alarm symbol. - Page 11 Merlin IAQ Monitor Installation & Operation Manual Sensor Parameters Parameter Unit Default Threshold Measure Range Accuracy Resolution Good: 400-599 Fair: 600-1499 0–5000 ppm ± 50ppm+5% reading value 1ppm Poor: 1500> Good: 0-15 PM1.0 μg/m3 Fair: 16-56 Poor: 57> Good: 0-20 0-100 μg /m³：±15μg/m³...
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Page 12: Calibration & Maintenance
Merlin IAQ Monitor Installation & Operation Manual CALIBRATION & MAINTENANCE Calibration The IAQ monitor has self-calibration and cleaning features that ensure long-term stability and minimum maintenance. The monitor comes pre-calibrated from the factory and does not need to be re-calibrated in the field. An annual calibration check is advised, a new IAQ monitor, or other suitable reference monitor can be used as a comparison calibration standard. - Page 13 Merlin IAQ Monitor Installation & Operation Manual Page intentionally left blank Rev 01 Page 13 of 16...
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Page 15: Technical Specification
Merlin IAQ Monitor Installation & Operation Manual TECHNICAL SPECIFICATION Mounting Wall Mounted Entry ½” 12.5mm DIA Rear Entry Size (W x H x D) 86 x 114 x 35mm Mechanical Weight (Max) 0.2kg Enclosure ABS UL Flame retardant – IP40... - Page 16 Merlin IAQ Monitor Installation & Operation Manual Please pass this manual to the system owner/user. Date of Installation: Installation Location: Organisation: Stamp/Signature of the installer: We recommend all S&S equipment be commissioned by competent/trained engineers to ensure correct installation and operation. We strongly recommend the response and alarm signals are tested and validated once installed.
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