User Manual for AGS Merlin 1000SW+ Isolation Controller

Quick Guide

The AGS Merlin 1000SW+ is a gas pressure proving, electric, and water isolation system designed for educational establishments and laboratories. It provides centralized control over gas, electric, and water supplies via a key-switch and touch sensors. Key operational notes include:

• Initial Power-Up: Utilities can only be turned on or off within 10 seconds of turning the key switch. After 10 seconds, buttons are disabled; you must cycle the key switch to adjust settings.
• Safety: The system monitors gas pressure and will shut off the gas valve if pressure drops below 0.17psi.
• Timeout: An automatic shut-down feature can be configured for 2, 4, or 8 hours.

Installation

Installation must be performed by a licensed, insured contractor in accordance with local regulations (e.g., NEC/CEC in North America). The panel is designed for surface mounting, 48-60 inches above the finished floor level.

• Remove the front cover using the provided socket wrench.
• Mark and drill four screw holes on the wall.
• Ensure the wall surface is flat to prevent base distortion.
• After wiring, replace the cover and insert security caps over the bolts.

Circuit Board Connections

The circuit board provides terminals for:

• Power/Line In: 110-120V AC supply, fused at 3A.
• Outputs: Connections for Gas Solenoid Valve, Electric Contactor, and Water Valve (all 110-120V AC).
• BMS Out: Dry contact connections (NO/COM/NC) for Building Management Systems.
• Pressure Sensor: Connects to the downstream port of the gas solenoid valve (Red +, Black -, Blue IN).
• Gas Detectors: Connects to the panel; if no detector is used, the factory-fitted link must remain.
• CO2 Monitor & 12VDC: Power output for external devices (max 50mA).
• Fan Switches: Connections for external fan switches (supplied separately).

Operation

The front panel features LED indicators to show system status:

• Gas: Illuminates when gas is on.
• Electric/Water: Illuminates when the respective service is on.
• Testing: Illuminates green during the 30-second gas integrity check.
• Test Fail: Illuminates amber if a gas leak is detected on start-up.
• Pressure Low: Illuminates amber if gas pressure drops below 0.17psi.
• Timeout: Illuminates amber when the auto-shut down timer activates.
• EM Stop: Illuminates amber when an emergency shut-off button is pressed.
• CO2/Gas Detected: Illuminates red if an external detector triggers an alarm.

Maintenance

Keep the panel in good working order by following these guidelines:

• Regularly remove dust from the outer enclosure using a slightly damp cloth.
• Never use detergents, solvents, or aerosols near the device.
• Do not paint the device, as this will seal vents.
• Perform regular 'bump tests' (gas response checks) to ensure detectors are functioning correctly. AGS recommends testing detectors every 12-18 months.

Specifications

The unit operates on 110-120V AC, 50-60Hz, with a maximum power rating of 6W. It is designed for indoor wall mounting with an operating temperature range of -10 to 50°C (14 to 122°F).