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Installation & Operation Manual
Merlin 2000S
Merlin 2000S
Gas Proving and Ventilation Interlock System
Installation & Operation Manual
Please read this manual carefully and retain for future use.
This panel is designed for use when the kitchen appliances do not have flame failure devices
fitted, therefore gas proving is a requirement.
The Merlin 2000S system acts as an interlock between the ventilation system and the gas
solenoid valve. The system is compatible with both current monitors and air pressure
differential switches in order to interlock with up to 4 fans.
2000S IOM Rev: 10
07-20
1
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Table of Contents
Summary of Contents for S&S Northern Merlin 2000S
- Page 1 This panel is designed for use when the kitchen appliances do not have flame failure devices fitted, therefore gas proving is a requirement. The Merlin 2000S system acts as an interlock between the ventilation system and the gas solenoid valve. The system is compatible with both current monitors and air pressure differential switches in order to interlock with up to 4 fans.
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Page 2: Table Of Contents
Installation & Operation Manual Merlin 2000S Contents INSTALLATION ..................3 Planning ......................... 3 Fixing - Mounting ......................3 Typical Installation Arrangement ................4 Terminal Connections ....................4 Switch Settings......................6 Specification ........................ 7 OPERATION ....................8 First Power Up ....................... 8 Emergency Shut Off Button .................. -
Page 3: Installation
The fans can be monitored through air pressure switches or by means of an additional current monitor. To operate the Merlin 2000S the fans should be turned to the ‘on’ position, once the panel receives a signal to indicate the fans are operating the key on the panel can be turned to the ‘on’... -
Page 4: Typical Installation Arrangement
Installation & Operation Manual Merlin 2000S Typical Installation Arrangement Terminal Connections 1. POWER / LINE IN 240VAC Power should be supplied to the [POWER / LINE IN] terminal and fused at 3A. On connecting the mains supply to the panel the power LED indicator will light up – this is located on the front cover. - Page 5 Installation & Operation Manual Merlin 2000S 4. BMS OUTPUT Connections are available on the board for Building Management Systems. [NO Normally Open] [COM Common] [NC Normally Closed] These are volt free connections. This is a relay that changes state in alarm or when the gas is on/off and can be used in conjunction with the 12V DC output and other external relays that affect other devices and controls such as purge fans and audible alarms etc.
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Page 6: Switch Settings
Installation & Operation Manual Merlin 2000S 9. CO2 MONITOR This terminal can be used to connect a Merlin CO monitor to shut off the system in the event of a high concentration of CO If no CO2 monitor is connected, the panel will ‘beep’ upon power up and the CO2 LED will flash 3 times to indicate that this terminal has been disabled. -
Page 7: Specification
Note: This option is not available if a Fan Switch is not installed. Fire Panel Integration The Merlin 2000S can be integrated with a fire alarm to close the gas supply automatically in the event of a fire. The volt free fire alarm signal can be wired in series with any remote emergency shut off buttons. -
Page 8: Operation
LED Indicators Gas On When the fans are running and the key switch is turned on, the Merlin 2000S will open the gas valve and the Gas-On LED will illuminate. ON = Gas On / OFF = Gas Off ... -
Page 9: Servicing & General Maintenance
Installation & Operation Manual Merlin 2000S Extract Fans Under normal working the LED will illuminate. If an extract fan fault is detected, the LED will flash. ON = OK / *FLASHING = One of the extract fans is not running *IF SUPPLY AND/OR EXTRACT FANS LED FLASHES FOR MORE THAN 20 SECONDS, THE GAS WILL SHUT OFF. -
Page 10: Bump Testing
Installation & Operation Manual Merlin 2000S 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 device to trigger an alarm condition and ascertain the detector is working safely. -
Page 11: Important Warning Statements
Installation & Operation Manual Merlin 2000S IMPORTANT WARNING STATEMENTS Please take the time to thoroughly read this user’s guide which should be retained for future reference. It is recommended that this device be commissioned upon installation. Do not apply lighter gas or other aerosols to detectors – this will cause extreme damage to the gas sensing elements. -
Page 12: Installation Details
Installation & Operation Manual Merlin 2000S Installation Details Please pass this manual to the system owner or system user. Date of Installation: Installation Location: Organisation: Stamp/ Signature of the installer: S&S Northern Head Office Tel: +44(0) 1257 470 983 Fax: +44(0) 1257 471 937 www.snsnorthern.com...