About PreAction-PAC

The FM Approved United Fire Protection PREACTION-PAC is a fully assembled pre-action fire suppression system, including preaction valve, trim, and control panel providing one complete zone of pre-action water sprinkler fire protection. All components are contained in two steel enclosures assembled one above the other. The system pressure gages and the required manual release handle are mounted on the front of the lower enclosure. The system detection and control panel is mounted behind a door in the upper enclosure with a clear polycarbonate window allowing visual access to the system indicators. Lockable latches on both doors permit authorized access to all system components. Both enclosures are finished in powder-coat red paint. Gasketing provides sealing of the enclosure doors. Knockouts permit easy attachment of external electrical conduits.

Piping

Water inlet pipe connections are located on the lower left side and the upper right corner of the lower enclosure. The unused inlet is left plugged. Grooved pipe is used for the inlet connection. All pipe connections are done in the lower enclosure.

Pre-Action Valve

The pre-action valve installed in the Preaction-Pac is a low differential, latched clapper valve that uses a unique direct-acting diaphragm to separate the system water supply from the system piping. The positive latching system uses the supply water pressure to hold the clapper shut. When the water pressure in the diaphragm chamber is released, the latch retracts from the clapper and the valve actuates. The low differential and unique latch and actuator design of the valve allows the valve to be self-resetting.

Wiring

Control panel power, compressor power, detection circuits, notification appliance circuits, and circuits requiring contact closure are connected to terminal strips in the upper enclosure. No access to the lower enclosure is necessary to complete the wiring installation.