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Installation & Operation Manual
Merlin 1500S
Merlin 1500S
Gas & Ventilation Interlock System
Installation & Operation Manual
Please read this manual carefully and retain for future use.
The Merlin 1500S ventilation interlock system is designed for kitchens where all appliances have
built in flame failure devices and there is no need for gas pressure proving. The Merlin 1500S
acts as an interlock between the ventilation system and the gas solenoid valve. It ensures the
gas solenoid cannot be opened unless the ventilation system is proven to be working and
working at such a speed that is effective to exhaust the fumes from the appliances.
1500S IOM Rev: 8
07-20
1
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Related Manuals for S&S Northern Merlin 1500S
Summary of Contents for S&S Northern Merlin 1500S
- Page 1 The Merlin 1500S ventilation interlock system is designed for kitchens where all appliances have built in flame failure devices and there is no need for gas pressure proving. The Merlin 1500S acts as an interlock between the ventilation system and the gas solenoid valve. It ensures the gas solenoid cannot be opened unless the ventilation system is proven to be working and working at such a speed that is effective to exhaust the fumes from the appliances.
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Page 2: Table Of Contents
Installation & Operation Manual Merlin 1500S Content 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 1500S 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 1500S 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 1500S 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
This option is not available if a Fan Switch is not installed. Fire Panel Integration The Merlin 1500S 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 7: Specification
Installation & Operation Manual Merlin 1500S Specification Model: 1500S Visual Indication Mains Electrical Power Input 100-240VAC Gas Solenoid Valve Output 100-240VAC Current Consumption 12W max (50mA) Internal Fuse 3.15A Operating Temperature 32 – 104°F 0-95%RH Non-Condensing Audible Alarm Buzzer dB... -
Page 8: Operation
LED Indicators Gas On When the fans are running and the key switch is turned on, the Merlin 1500S 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 1500S Fan Fault Under normal working conditions this LED is off. If a fan fault is present for more than 20 seconds, the LED will illuminate RED. OFF = OK ON = the gas supply has been shut off due to a ventilation fault. -
Page 10: Bump Testing
Installation & Operation Manual Merlin 1500S 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 1500S 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 1500S 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...
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