User Manual

Concise user manual | NANO-EN | October 1, 2022 | version 2.2 page 6
9.5 DIRECT RELEASE
When the timer settings are set to a delay (between 10 – 35 seconds), the direct extinguish DIP switch
gives the choose to override the delay in case of a fire event. This function can be selected via DP1.
9.6 VEHICLE MODE
If the extinguishing system is intended for the protection of a vehicle engine bay, then a programmed
extinguishing delay must be disabled, when the vehicle is parked, and the driver leaves the vehicle.
Please note that the vehicle mode does not work in the only manual mode.
9.7 GENERAL FAULT RELAY
The general fault relay signals any fault in the NANO. The general fault relay is energized in quiescent
state. In the event of a complete power failure, the general fault relay becomes inactive. This is fail-
safe condition of the NANO panel.
9.8 VFC FIRE RELAY ACTIVE IN SINGLE OF DUAL MODE ALARM
A single or dual FIRE indication can trigger the VFC relay. You can choice to have the potential free
contact active at the first or at the second fire alarm. This function can be selected via dip switch 5.
9.9 SINGLE OR DUAL ZONE
Usually, the extinguishing system is activated in the so-called two group-dependent status (avoiding
coincidence). Two fire conditions must be met before an extinguishing activation
be initiated. In some cases, a single mode status can be handy. This function can be selected via DIP
switch 4.
9.10 EXTINGUISHANT RELEASE DELAY
Extinguishing delay is only useful in normally occupied spaces. For the delay timer settings, there are
3 Dip Switches 6,7 and 8, which can be set in steps of 5 seconds the delay time between 0 and 35 sec.
10 I NPUTS
The NANO is equipped with two detection zones and two external button inputs (Extinguishing
Release & Hold). These inputs are continuously scanned for alarm or fault detection. All inputs are
monitored and require a 10 kΩ end of line resistor, even if the input is not used. The button inputs
must have a trigger resistor between 470 and 1000 Ω.
10.1 DETECTION ZONES
The NANO is equipped with two fire detection zone inputs. The loop inputs are continuously scanned
for fire or fault detection. The loops are set to the following values:
 RESISTANCE of less than 100 Ω: FAULT
 RESISTANCE of more than 100 Ω and less than 1,5 kΩ: FIRE
 RESISTANCE of more than 1,5 kΩ and less than 8 kΩ: FAULT
 RESISTANCE of more than 8 kΩ and less than 12 kΩ: NORMAL
 RESISTANCE of more than 12 kΩ: FAULT