
Installation & Commissioning of Control & Monitoring Add On’s
Page: 12
Disabled Mode
Disabled mode is selected by placing the keyswitch at the Agent Release Module in the Disabled
position. This electrically isolates the activation circuit, and results in the following:
¾Disabled indicators at the Agent Release Module and Local Control Station are lit.
¾Agent Release Module and Local Control Station buzzers sound.
¾No automatic releases can be commenced.
¾System inoperative output is activated.
Note: Disabled mode can not be overridden.
Manual Mode
When the board is in manual mode, then the
¾Manual Only indicators at the Agent Release Module and Local Control Station are lit
¾No automatic release sequences can be commenced.
¾Does not interrupt a release sequence that has started
¾System inoperative output is activated
To manually discharge the agent, the Manual Release facility at the Agent Release Module or the
Local Control Station is activated.
The manual release sequence is:
9Manual Release Activated indicators are lit on the Agent Release Module and Local
Control Station
9Stage 1 outputs are switch to +24VDC.
9Stage 2 outputs are pulsed during the pre-release delay to +24VDC.
9Start optional pre-release delay. (Selected via FACP on-site programming).
9Upon expiration of the delay, activate the selected activation circuit and stage 2 outputs
becomes steady
9Light the agent released LED on the Agent Release Module and Local Control Station
when pressure switch input on the termination card is activated or immediately (depends
on the pressure switch configuration).
9FACP to activate the FIRE output and light the FIRE LED
The discharge sequence can be interrupted by the activation of the Hold input. Activation of the
Hold input prevents the release of the agent. When the Hold switch is released, the pre-release
delay is restarted. While the Hold input is activated, the stage 2 output is switched off, and the
buzzer will sound.
Auto/Manual Mode
In this mode, automatic and manual discharge is possible. For manual discharge see above.
The automatic discharge sequence is initiated when one or two zones go into alarm.
With single zone alarm activation the following discharge sequence is executed.
9Auto Activation indicator is lit on the Agent Release Module and Local Control Station
9Stage 1 outputs are switched to +24VDC
9Stage 2 outputs are pulsed during the pre-release delay to +24VDC
9Start optional pre-release delay (Selected via FACP on-site programming).
9Upon expiration of the delay, activate the selected activation circuit and stage 2 outputs
becomes steady.
9If configured light the agent released LED on the Agent Release Module and Local Control
Station when pressure switch input on the termination board is activated.
9FACP to activate the FIRE output and illuminate the FIRE LED.
9The operation of the Hold switch is as per the manual release
With dual zone activation, if the first zone goes into alarm, then the following steps are followed;
9Flash the auto release activated LED at the Agent Release Module and
Local Control Station
9Stage 1 outputs are switched to +24VDC