The fire alarm control panel (FACP) or the releasing panel serves as the brain. It monitors the environment for smoke or heat and sends the activation signal. In a Qtec diagram, this is usually represented by a large rectangle with input/output terminals labeled.
The control head usually contains two independent micro-switches (SW1 and SW2). Each switch has three terminals: qtec fire suppression wiring diagram
, allowing for compatibility with both 12V and 24V vehicle systems. Supervised Inputs The fire alarm control panel (FACP) or the
| Terminal Label | Typical Function | State (Armed/Normal) | State (Fire/Actuated) | | --- | --- | --- | --- | | SW1 - COM | 24VDC+ from panel | 24V present | 24V present | | SW1 - NO | Shunt trip gas solenoid | Open (0V) | Closed (24V) – Gas off | | SW1 - NC | Exhaust fan run signal | Closed (24V) | Open (0V) – Fan stops | | SW2 - COM | Building FACP common | Reference | Reference | | SW2 - NO | Alarm relay to panel | Open | Closed – Send signal | qtec fire suppression wiring diagram