Chapter 2
system, since a pull station is not necessarily activated in the zone that contains the smoke or fire.
Sprinkler flow devices
Fire alarm system equipment may include two types of sprinkler flow devices: sprinkler flow switches and tamper switches.
Sprinkler flow switches, installed in fire sprinkler lines, notify the fire alarm control panel (FACP) of flow in the sprinkler lines. The FACP transmits an alarm to the smoke control system. The smoke control system may initiate automatic smoke control from the alarm. Sprinkler zones must coincide with the zone layout of the building and the zoning of the FACP.
Tamper switches are installed on manual shutoff valves in the fire sprinkler system. The switches provide a supervisory alarm signal to the fire alarm system if the shutoff valve closes. Alarms activated by tamper switches must not initiate the automatic operation of the smoke control system.
Fire alarm control panel
The FACP receives alarm signals. If the FACP receives an alarm, it notifies the smoke control system of the alarm and the alarm location. The zone layout of the FACP must match the zone layout of the building to ensure that the FACP is capable of sending accurate signals to the smoke control system. The mechanical and electrical consulting engineers coordinate the building zone layout to the FACP layout to ensure a proper interface.
Firefighter’s smoke control station
The firefighter’s smoke control station (FSCS) enables firefighters to take manual control of the smoke control system. The FSCS must be located in an easily accessible but secure location. The normal location is near the FACP.
IMPORTANT
The FSCS must be listed by Underwriters Laboratories (UL) as suitable for enabling firefighters to take manual control of the smoke control system.
Commands from the FSCS control panel are the highest priority commands in the system. They override automatic control of smoke control system components.
The FSCS provides a graphic representation of the building. It shows smoke control zones and associated smoke control mechanical equipment. The panel includes: lights, an audible trouble LED, and manual switches.
22 |
