Chapter 3: Commissioning
ZP3-ECU Extinguishing Control Unit Installation and Commissioning Manual
21
Actuator wiring
Make sure that:
• The actuator is not connected.
• A 2K2
Ω
EOL resistor is fitted at the point of actuator connection.
• For the purpose of commissioning, connect a 24 VDC lamp or use the
multimeter to monitor the voltage across the EOL resistor at the point of
actuator connection.
Pressure switches (optional)
Check the following:
• If the extinguishing cylinder pressure and extinguishing discharge (via
pressure switch) are monitored, then connect a 3K9
Ω
EOL resistor in series
with the low cylinder pressure monitor at the cylinder (see “Connecting the
ZP3-ECU” on page 11 for wiring details).
• If extinguishing discharge and extinguishing pressure are not being monitored
(with switch SWT3-1 ON), then fit a 3K9
Ω
resistor across terminals TB1.15
and TB1.16.
Remote functions
If one or more status units are connected, then make sure that:
• They are connected according to the respective wiring schematic (see Figure
• The EOL links are inserted on the last status unit and are removed from the
ECU and other status units in the chain.
Extinguishing release manual call points
Make sure that the manual call point resettable element is not in the activated
state (pushed in). If it is, reset the call point by turning the key anticlockwise (one
click).
Applying power
1. Apply 24 VDC to the ZP3-ECU.
2. Apply power to the fire alarm control panel to which the ECU is connected.
3. Allow the fire alarm control panel to initialise and calibrate as per normal start
up.
After a short period the panel reverts to normal running mode and displays the
date and time. If any faults are displayed, remove power, rectify the fault, and
repeat steps 2 and 3 above.
