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Mini Merlin Installation, Operation & Maintenance
Mini Merlin TFT CH4CO
v2
Dual Gas Detector
Installation, Operation & Maintenance Manual
Please read this manual carefully and retain for future use.
For specific requirements that may deviate from the information in this guide – contact your supplier.
Oceania Gas Safety
www.oceaniagassafety.com
Rev: 01 02-22
1
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Table of Contents
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Summary of Contents for OGS Mini Merlin TFT CH4CO v2
- Page 1 Mini Merlin Installation, Operation & Maintenance Mini Merlin TFT CH4CO Dual Gas Detector Installation, Operation & Maintenance Manual Please read this manual carefully and retain for future use. For specific requirements that may deviate from the information in this guide – contact your supplier. Oceania Gas Safety www.oceaniagassafety.com Rev: 01 02-22...
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Page 2: Table Of Contents
Mini Merlin Installation, Operation & Maintenance Contents Safety Information ..................3 Carbon Monoxide – General Information ................4 Methane – General Information ....................4 Installation ..................... 5 Typical Application & Location ....................5 Mounting & Cabling ........................6 Circuit Board Overview ......................7 Wiring ............................ -
Page 3: Safety Information
At the end of their working life, electrochemical sensors should be disposed of in an environmentally safe manner. Alternatively, they can be securely packaged and returned to OGS clearly marked for disposal. Electrochemical sensors should not be incinerated as this may cause the cell to emit toxic fumes. -
Page 4: Carbon Monoxide - General Information
In simplified terms, a level of 8% LEL or less on this device is generally considered safe and acceptable. For more information, please visit our website or contact your local OGS distributor. Rev: 01 02-22... -
Page 5: Installation
Mini Merlin Installation, Operation & Maintenance Installation Typical Application & Location Installation must be in accordance with the recognised standards of the appropriate authority in the country concerned! Access to the interior of the device, when carrying out any work, must only be conducted by trained personnel! Before carrying out any work ensure local regulations and site procedures are followed! Easy access is recommended for both status observation and alarm purposes and must be located out of reach of the public! Isolate the equipment from all hazardous live power sources before opening the cover! -
Page 6: Mounting & Cabling
Mini Merlin Installation, Operation & Maintenance Mounting & Cabling If mounting direct to wall - ensure the wall surface is flat to prevent base distortion! Ensure the rear base is installed in the correct orientation as shown! Where cable glands/conduits are used for wire entry, use 20mm (3/4 inch) max separated by at least 20mm! Any parts that form part of the connections/installation must have a minimum fire retardant rating of UL94V-1! Damage to PCBs when creating cable entry points or attempting to remove the circuit board may void any warranty! The monitor is designed for either surface mounting or mounted on a one or two gang electrical box. -
Page 7: Circuit Board Overview
Mini Merlin Installation, Operation & Maintenance Circuit Board Overview Damage to PCBs when creating cable entry points may void any warranty! Take care when making connections to high voltage connectors! Any damage attempting to remove the circuit board may void any warranty! All Class 2 wiring is to be installed within flexible tubing to maintain segregation between circuits! Wiring of different circuits shall be separated by means of routing, clamping or barrier! For field connections other than connected Heat detectors use wires suitable for at least 167°F (75°C) - Page 8 Mini Merlin Installation, Operation & Maintenance APPLIANCE LIMIT CIRCUIT The device can be used to directly shut down a gas appliance when a fault condition is detected (gas leak) by wiring terminals of one BMS into the low voltage safety limit circuit of the appliance. To connect both BMS to the safety limit circuit of an appliance - wire in series.
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Page 9: Auto Reset & Buzzer Switches
Mini Merlin Installation, Operation & Maintenance PILOT WATER HEATER & BOILER LIMIT BREAKER The device can be used to directly shut the pilot of a water heater in an alarm or power failure state using a product from Field Controls. The BMS terminals may also be used to connect to a home alarm system. REMOTE SHUT OFF Your mini-merlin can be integrated with remote devices with an open /close circuit via the Remote Shut-Off volt free switch terminal. -
Page 10: Operation
Mini Merlin Installation, Operation & Maintenance Operation Initial Power Up When power is removed manually or due to an unpredicted power failure the CO and NG BMS circuit will change state switching off boilers/appliances via a limit switch if configured to do so! When electrical power is supplied, press, and hold the touch sensor on the front cover for ~3 seconds. -
Page 11: Manual Circuit Simulation Test
Mini Merlin Installation, Operation & Maintenance Manual Circuit Simulation Test The manual circuit test does not check the gas sensor itself! Press and hold the touch sensor during normal operation. This option gives the user the opportunity to test each relay/output in response to gas. When the touch button is pressed and held during normal operation the mini merlin will simulate an open circuit to ensure all configured systems, outputs, alarms, indications, and other external devices operate as intended in response to gas. -
Page 12: Maintenance
What do I need? Contact your OGS representative for details of suitable bump testing kits and gases. Kits usually consist of a certified gas cylinder or spray. We recommend only using OGS calibration gas kits to ensure correct flow rates meet OGS technical requirements. -
Page 13: Bump Test Procedure
Mini Merlin Installation, Operation & Maintenance Bump Test Procedure To increase reaction time, cover the escape vents at the sides of the device. Always remove the regulator/valve if using a cylinder after use! Always give at least five (5) minutes between testing the same unit or until gas has fully dispersed! Always consider safety and use equipment in accordance with Safety Data Sheets! Reference should always be given to any applicable national &... - Page 14 Mini Merlin Installation, Operation & Maintenance Page intentionally left blank Rev: 01 02-22...
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Page 15: Specification
Mini Merlin Installation, Operation & Maintenance Specification General Model: Mini Merlin CH4CO v2 Target Gases: Methane/Natural Gas & Carbon Monoxide Size: (H x W x D) 5.95 x 4.37 x 1.97” (151 x 111 x 50mm) Housing Material: ABS PA765 (Flame Rating UL94 V-1) Mounting: Safe Zone - Indoor use - Wall Mounted Weight:... - Page 16 Every effort is made to ensure the accuracy of this document; however, OGS can assume no responsibility for any errors or omissions in this document or their consequences. OGS would greatly appreciate being informed of any errors or omissions that may be found in the content of this document.
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