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Installation & Operation Manual
Your new Mini Merlin is a dual gas sensor carefully designed and tested to monitor levels of Methane
(CH
) and Carbon Monoxide (CO) in the air. If there is a dangerous build-up of gas or unsafe levels of
4
carbon monoxide at the sensor, this device can shut off the gas supply via a gas safety valve and/or a
gas fired appliance.
This device has additional features for resetting systems, as well as audible and visual alarms - It can also
be integrated with a Building Management System (BMS).
Rev: 12 01-20
MINI MERLIN CH4CO
Dual Gas Detector
Methane & Carbon Monoxide Gas
Installation & Operation Manual
Please read this manual carefully and retain for future use.
AGS Mini Merlin CH4CO
1
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Summary of Contents for AGS MINI MERLIN CH4CO
- Page 1 Installation & Operation Manual AGS Mini Merlin CH4CO MINI MERLIN CH4CO Dual Gas Detector Methane & Carbon Monoxide Gas Installation & Operation Manual Please read this manual carefully and retain for future use. Your new Mini Merlin is a dual gas sensor carefully designed and tested to monitor levels of Methane ) and Carbon Monoxide (CO) in the air.
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Page 2: Table Of Contents
Installation & Operation Manual AGS Mini Merlin CH4CO Table of Content CARBON MONOXIDE GAS ................. 3 General Information ..................... 3 METHANE GAS ................... 4 General Information ..................... 4 INSTALLATION ................... 5 Planning ........................... 5 Typical Location and Positioning................5 Fixing ..........................6 Board Overview ...................... -
Page 3: Carbon Monoxide Gas
Vehicles and other combustion engines running in open or confined spaces. Burning charcoal or fuel in grills in an enclosed area or near the home. For more information, please visit our website or contact your local AGS distributor. Rev: 12 01-20... -
Page 4: Methane Gas
LEL% (a percentage of the LEL) and will alarm based on the following principle of gas detection. In simplified terms, a level of 8% LEL or less on your device is generally considered safe and acceptable. For more information, please visit our website or contact your local AGS distributor. Rev: 12 01-20... -
Page 5: Installation
Installation & Operation Manual AGS Mini Merlin CH4CO INSTALLATION Planning Our monitors should be installed in areas at risk of gas leaks e.g. over boilers, valves or meters. Take in to account the design of the air flow patterns within the zone area. -
Page 6: Fixing
Installation & Operation Manual AGS Mini Merlin CH4CO Fixing Unpack all the parts! This device is designed for surface mounting using 2 mounting screws (not supplied) and must be installed by a licensed, insured contractor. Carefully remove the rear cover from the unit. -
Page 7: Board Overview
Installation & Operation Manual AGS Mini Merlin CH4CO Board Overview 1. POWER/LINE IN Mains power input. 110-120v AC 2. VALVE OUT Gas valve power output. 110-120v AC 3. AUTO RESET & BUZZER SWITCH 4. CO BMS Relay will switch when CO gas reaches the alarm level. -
Page 8: Wiring The Device
Installation & Operation Manual AGS Mini Merlin CH4CO Wiring the Device Gas Supply Controlled by 100-120VAC Solenoid Valve A 110-120VAC gas solenoid valve should be powered using the terminals marked [VALVE OUT]. When the GAS VALVE terminal is wired to a normally closed (NC) gas solenoid valve, the device can be used to isolate gas supply for multiple appliances. - Page 9 Installation & Operation Manual AGS Mini Merlin CH4CO Appliance Limit Circuit To connect both CO and NG to the safety limit circuit of an appliance - wire in series as per the following diagram. Multiple Appliance Limit Circuit The device can be used directly to disable multiple gas appliances when a fault condition is detected (gas leak) by wiring a multi-pole relay to the GAS VALVE LINE terminal.
- Page 10 Installation & Operation Manual AGS Mini Merlin CH4CO Pilot Water Heater and Boiler Limit Breaker The device can be used to directly shut the pilot of a water heater using a product from Field Controls. The BMS terminals may also be used to connect to a home alarm system.
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Page 11: Audible Alarm Switch
Installation & Operation Manual AGS Mini Merlin CH4CO Audible Alarm Switch The user can choose whether to have an audible alarm when dangerous gas levels are detected. The alarm will continuously sound – there are no provisions to silence the alarm, gas levels must drop to a safe level for the alarm to stop. -
Page 12: Operation
Installation & Operation Manual AGS Mini Merlin CH4CO OPERATION First Power Up Supply mains electrical supply and press and hold the touch button for 3 seconds. The device enters ‘sensor stabilisation’ phase for approximately 60 seconds – during this period the screen will display an ‘initialisation’... -
Page 13: Touch Button
Installation & Operation Manual AGS Mini Merlin CH4CO Touch Button POWER UP Press and hold for 3 seconds when electrical supply is connected. RESET To reset after a gas alarm - press the touch button once. TEST Press and hold for 3 seconds when powered to test screen colouration, audible alarm and gas/BMS relay. -
Page 14: Bump Testing
Installation & Operation Manual AGS Mini Merlin CH4CO Bump Testing What is bump testing? ‘Bump testing’ is a term used for checking a gas detector is functioning correctly by exposing it to the target gas. A known concentration of the target gas is applied to the sensor to trigger an alarm condition and ascertain the detector is working safely. -
Page 15: Important Warning Statements
Installation & Operation Manual AGS Mini Merlin CH4CO IMPORTANT WARNING STATEMENTS The information contained within this manual 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. - Page 16 Installation & Operation Manual AGS Mini Merlin CH4CO For all correspondence regarding your device: AGS Head Office Tel: (727) 608-4375 Fax: (727) 538-4237 info@americangassafety.com American Gas Safety is the owner of this document and reserves all rights of modification without prior notice.
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