Chapter 2: Operation
10
ZP3-ECU Extinguishing Control Unit User Guide
Operator response after manual discharge of extinguishant
• Call the fire department.
• Investigate the protected area and make sure that the source of smoke or
heat has been adequately extinguished.
• Disable the ECU by turning the Locked Off/Reset key switch (Figure 4, item
5) clockwise so that the two red LEDs (Figure 4, item 3) illuminate.
• The extinguishant discharge sounder silences.
• Press the Accept/Panel Silence button followed by the Reset button on the
fire alarm control panel and the panel should return to normal.
• Notify the maintenance staff or company to have the extinguishant cylinders
refilled and actuator replaced.
• Reset the extinguishing manual call point by turning the MCP key
anticlockwise (one click).
• Turn the Locked Off/Reset key switch (Figure 4, item 5) anti-clockwise and
the ECU returns to its normal operation condition.
Fire operation – automatic extinguishing
The following information is for guidance only. You must comply with your own
fire drill instructions and local codes of practice.
As a precaution against inadvertent extinguishant discharge, the ECU is
configured so that the fire alarm has to be received from two independent
sources (coincidence connection) before automatic discharge takes place. This
can only happen if the system is set to Automatic.
Initial fire alarm
Indications
When the first device detects heat or smoke in the protected area, the following
occurs:
• The two red Fire LEDs (Figure 4, item 1) on the ECU illuminate.
• The extinguishant discharge sounder is activated.
• The buzzer on the fire alarm control panel sounds, the zone/common Fire
LEDs flash, and the event is displayed on the fire alarm control panel display
with the zone and device number.
• The red LED at the triggered device flashes.
• If a printer is connected to the fire alarm control panel then the event details
are printed.
