Chapter 2: Operation
12
ZP3-ECU Extinguishing Control Unit User Guide
Automatic extinguishing
• Automatic extinguishing starts once the preset time delay has lapsed.
• The two red Extinguishant Discharged LEDs, (Figure 4, item 12) illuminate on
the ECU when extinguishing has started.
• The event is displayed on the fire alarm control panel display with the zone
number and loop address of the ECU.
• If a printer is connected to the fire alarm control panel then the event details
are printed.
Operator response to automatic extinguishing
1. Call the fire department.
2. Investigate the protected area and check that the source of smoke or heat
has been adequately extinguished.
3. Press the Accept/Panel Silence button followed by the Reset button once the
source of smoke or heat has been removed. The fire alarm control panel
should return to normal if the initiating source has been adequately handled.
4. Reset the ECU by turning the Locked Off/Reset key switch, (Figure 4, item 5)
clockwise once and then anti-clockwise to the vertical position.
The extinguishant discharge sounder silences.
The two red Extinguishant Discharged LEDs, (Figure 4, item 12) go out.
Notify the maintenance staff or company to have the extinguishant cylinder re-
filled and the actuator replaced if necessary.
The Automatic/Manual key switch
Use this feature to isolate automatic release of the extinguishant, particularly
when the protected area is occupied.
Turn the Automatic/Manual key switch (Figure 4, item 7) to the horizontal position
to select Manual mode operating mode, the following occurs:
• The two green Manual mode LEDs (Figure 4, item 8) illuminate.
• If a printer is connected to the fire alarm control panel then the event details
are printed.
Turn the Automatic/Manual key switch to the vertical position to select Automatic
mode operating mode, the following occurs:
• The two yellow Automatic mode LEDs, (Figure 4, item 6) illuminate.
• If a printer is connected to the fire alarm control panel then the event details
are printed.
