Chapter 2: Operation
ZP3-ECU Extinguishing Control Unit User Guide
9
Normal operation
Under normal operating conditions the following indications exist:
• Yellow Automatic mode LEDs (Figure 4, item 6) ON if key switch (Figure 4,
item 5) in vertical position
–OR–
Green Manual mode LEDs (Figure 4, item 8) ON if key switch (Figure 4,
item 5) in horizontal position
• Green Power On LED (Figure 4, item 4) ON
• No audible alarms sounding
Fire operation – manual extinguishing
Caution:
The guidelines below are given for guidance only. You must comply
with your own fire drill instructions and local codes or practice.
The extinguishing sequence can be initiated manually if fire is detected in the
protected area. This can be done with the ECU in any mode except Locked Off
mode.
Manual extinguishing initiation
1. Evacuate all personnel from the protected area.
2. Lift the flip cover and push the resettable element on the extinguishing
release manual call point (Figure 4, item 14) to manually activate the
extinguishing alarm. Leave the area of the ECU (if inside the protected area).
System response to manual extinguishing Initiation
• The extinguishant discharge sounder sounds.
• Any plant/ventilation, etc. connected to the ECU shuts down, and doors and
openings automatically close.
• The extinguishant is discharged. This action might be instantaneous or occur
after a time delay depending on set-up.
• The two red Extinguishant Discharged LEDs (Figure 4, item 12) illuminate on
the ECU.
• 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.
