Specifications

Page 77
FIREFINDER PLUS
(
AUST
)
INSTALLATION
,
COMMISSIONING OPERATION
Note: A “manual release” can still be initiated in “auto mode” but the LCS “Inhibit” control WILL
NOT inhibit / abort the agent release sequence.
Single Zone Activation, the following discharge sequence is executed;
 Automatic Activation LED is illuminated on the Agent Release Module and Local Control
Station.
 Stage 1 outputs are switched to +24VDC. (FIRE ALARM sign illuminated, aural alarm
sounds).
 Stage 2 outputs are switched to +24VDC. (FIRE ALARM, EVACUATE & DO NOT
ENTER signs illuminated, aural alarm sounds).
 Optional pre-release delay is started (Selected via FACP on-site programming).
 The delay times out and if the Interlock signal is ON, the selected circuit will activate.
 The Pressure Switch field input on the Termination Board is activated and the Agent
Discharge LED on the Agent Release Module and Local Control Station will be
illuminated.
 Activate gas-fired output.
Dual Zone Activation, if the first zone goes into alarm the following steps are initiated;
 The automatic activation LED on the Agent Release Module and Local Control Station will
flash.
 Stage 1 outputs are switch to –24VDC. [FIRE ALARM sign illuminated, aural alarm
sounds].
When the second zone goes into alarm, then the following steps occur;
 Automatic activation LED goes steady.
 Stage 1 outputs are switched to +24VDC. (FIRE ALARM & EVACUATE signs illuminated,
aural alarm sounds)
 Stage 2 outputs are switched to +24VDC. (DO NOT ENTER sign illuminated)
 Optional pre-release delay commences (Selected via FACP on-site programming).
 The delay times out and if the Interlock signal is on the selected circuit will activate.
 The Pressure Switch field input on the Termination Board is activated and the Agent
discharge LED on the Agent Release Module and Local Control Station will be
illuminated.
 Activate gas-fired relay output.
Service Switch
The service switch is situated on the Agent Release Module when activated causes the following;
 Electrically isolates the activation circuitry from the agent release device.
 Operates the System Inoperative output.
Note: The service switch is NOT overridden by a manual discharge.
Lock-Off Valve
When the manual lock-off valve is operated;
 The agent is blocked from reaching the release valve.
 The lock-off valve inhibit indicator LED’s on the Agent Release Module and Local Control
Station are illuminated.
 The system inoperative output operates.
Fault Monitoring
Fault conditions are initiated by:
 The Pressure Switch monitoring circuit.
 The Low Pressure Switch monitoring circuit.
 The Lock-off Valve monitoring circuit.
 Activation circuitry.
 Stage 1 outputs. (Aural & visual discharge alarms).
 Stage 2 outputs. (Aural & visual discharge alarms).
 A Zone Fault.
 A Fault on the interlock input.
 A Fault with a LCS.