Ziton ZP3-ECU Installation And Commissioning Manual page 14

Chapter 1: System wiring
Guidelines to programming the ECU
All new protected areas MUST be wired using two addressable loops. This is to
ensure the highest level of security available against accidental discharge of
extinguishant.
The two addresses assigned to the ECU must be at least 20 apart (for example,
if ECU Loop A uses address A005 then ECU Loop B can only use addresses
from B025 onwards). Note that any two addressable loops of the fire panel may
be used for connecting the ECU. Any addresses may be assigned to the devices
within the protected area.
The devices in a protected area must be equally divided into two-coincidence
areas/patterns, namely CA1 and CA2.
A coincidence area may consist of a single detector or many detectors,
dependent on the size of the protected area.
Diagrams 1 to 4 shown in Figure 4 on page 7 represent a plan view of protected
areas with the dotted lines encompassing detectors. The dotted lines form the
two required coincidence areas/patterns CA1 and CA2, which zig-zag across the
protected area, overlapping in certain places. It can be seen therefore that due to
the coincidence pattern a fire in any part of the protected area will be as close as
possible to both coincidence areas.
The ECU has two addresses each of which is associated to its own coincidence
area/pattern. There must be a fire condition in both coincidence areas to initialise
an extinguishant drop.
If you want to program a system on a zone basis, then the coincidence coverage
patterns will inherently become fire zones (CA1 becomes fire Zone 1 and CA2
becomes fire Zone 2).
If you want to program a system on a device basis, then each detector in CA1
will be associated to the first ECU address and each detector in CA2 will be
associated with the second ECU address.
The basic programming principle is that from coincidence area 1 a fire alarm will
be mapped to the first ECU address and a fire alarm from coincidence area 2 will
be mapped to the second ECU address, resulting in an extinguishing drop. The
devices must be programmed on a SKNS (single knock non-silencing) basis for
correct operation.
Programming examples are provided on the following pages.
6 ZP3-ECU Extinguishing Control Unit Installation and Commissioning Manual