Chapter 2: Installation
8 1X-X3 Installation Manual
Option 3 — Z1, Z2, and Z3. All three zones cover the extinguishing area. An
alarm in any two of the zones initiates an extinguishing event. None of the zones
provides standard fire detection functionality.
Connecting zones
Figure 3 below shows connections for the default configuration (option 2).
Figure 3: Connecting zones for the default configuration
1. Zones in the extinguishing area
2. Zone for standard (mixed) fire detection
Line resistance
Line resistance is shown in the following table.
Table 2: Zone line resistance values
Zone type Resistance
Mixed detection 40 Ω max.
Automatic detection 55 Ω max.
Manual detection 55 Ω max.
To measure the line resistance:
1. Disconnect all zone devices.
2. Create a short circuit at the end of the zone line.
3. Measure the resistance between the positive and negative lines with a
multimeter.
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