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Installation & Operation Manual
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.
The information contained within this manual should be referenced for typical installation and operation only.
For specific requirements that may deviate from the information in this guide – contact your supplier.
Rev: 1
01-21
Merlin 1500S
Gas and Ventilation interlock system
Installation & Operation Manual
Please read this manual carefully and retain for future use.
Merlin 1500S
1
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Summary of Contents for CGS 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 Contents IMPORTANT WARNING STATEMENTS ............3 Installation ..................... 4 Planning ......................... 4 Fixing - Mounting ......................4 Typical Installation Arrangement ..................5 Terminal Connections ....................5 Switch Settings ......................7 Fire Panel Integration ..................... 7 Mode ........................ -
Page 3: Important Warning Statements
Please contact your supplier or local authority for details of recycling schemes in your area. Alternatively all CGS products can be securely packaged and returned clearly marked for disposal. Rev: 1 01-21... -
Page 4: 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’ position and this will open the gas solenoid valve. -
Page 5: Typical Installation Arrangement
Installation & Operation Manual Merlin 1500S Typical Installation Arrangement Terminal Connections 1. POWER / LINE IN 110-120V AC Power should be supplied to the [POWER / LINE IN] terminal and fused at 3A. 2. GAS SOLENOID VALVE OUTPUT 110-120V AC electrical power supplied from the [VALVE OUT] connector using a 3 core cable can be connected to a gas solenoid valve which can shut the gas supply on alarm status. - Page 6 Connections for remote emergency shut-off or stop buttons is detailed on the circuit board as [EM REMOTE]. This is linked out as a factory setting. Remote emergency shut-off buttons should be volt free and wired to the Merlin 1500S using a plenum security cable, white, 18/2 (18AWG 2 conductor), stranded, CMP or similar.
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Page 7: Switch Settings
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 8: General Specification
Installation & Operation Manual Merlin 1500S General Specification Model: 1500S Visual Indication Mains Electrical Power Input 110-120VAC 110-120VAC Gas Solenoid Valve Output Current Consumption 12W max (50mA) @ 120VAC Internal Fuse 3.15A Operating Temperature 32 – 104°F 0-95%RH Non-Condensing Audible Alarm Buzzer dB... -
Page 9: Operation
To reinstate the system, the emergency shut off button(s) will need to be reset and the panel restarted. 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. Supply Fans Under normal working the LED will illuminate. -
Page 10: Co 2 Mode
Installation & Operation Manual Merlin 1500S EM Stop If an emergency shut off button (either remote or on the panel) is pressed, the LED will illuminate and the gas is shut off. The button(s) must be re-set before restarting the system. -
Page 11: Maintenance
What equipment do I need to perform a Bump Test? Contact your CGS representative for details of suitable bump testing kits and gases. Kits usually consist of a certified gas cylinder; flow control regulator, tube pipe and applicator cone. - Page 12 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: Canadian Gas Safety info@canadiangassafety.com Telephone: 647-577-1500 Canadian Gas Safety is the owner of this document and reserves all rights of modification without prior notice.