The AGSTFL is for installing in a position where a fire hazard may occur, e.g. above boiler or water heater and interrupt the electrical supply to a gas solenoid valve or alarm. The link consist of a purpose built cast aluminium box with a perforated cover having a temperature sensitive fuse. The unit should be mounted so that the perforated cover faces downwards and the ventilation holes in the back of the box must not be obstructed.
