The Merlin CT1250X ventilation interlock system 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 fans can be monitored through two built-in current monitors or external air pressure switches. To operate the Merlin CT1250X, the key on the panel should be turned to the ‘on’ position and this will open the gas solenoid valve. If the fans should fail or are not operational, the ‘fan fail’ LED on the panel will illuminate and the gas solenoid will close. Additional sensors and safety shut off buttons can be wired into the panel.