The Fan Status and Control Annunciator, FS-Series, is designed for use in high-rise buildings and other facilities that must have a means to manually control the fans or dampers designated for smoke removal during a fire emergency. The unit is designed to work in conjunction with fire alarm and control systems to provide visual status and manual control capability for each smoke removal fan.
A three position switch is provided for each fan, along with two status indicators. There “ON/OFF” indicators are activated by contacts on the fan starter relays. The “ON” indicator will light only when the fan is running. The “OFF” indicator will light whenever the fan is NOT running.
When the switches are in the “AUTO” position, the system fans will be monitored only. During a fire emergency, the fire alarm system will operate the fans as per the smoke removal system design. Should conditions warrant manual control, and at the command of the authority having jurisdiction, the annunciator can be used to provide specific control of each smoke removal fan.
When the extinguished agent is discharged, the releasing panel activates the purge panel controller. The controller disables the key operated purge switch, lights the Panel Activated indicator and starts the timing cycle.
The purge fans can NOT be activated until the preset “agent soak time” has expired. When the time cycle is complete, the Purge Ready indicator is activated and the Purge switch is enabled.
Operation of the purge switch will light the Purge Running indicator and activate the remote relay output. This 24vdc output is used to energize a Start Relay (relay by others), located at the purge fan(s).