2 K SETS - Energija plus

OUT-LINE ON THE STANDARDS
UNI 9490 - UNI 10779
The principles for the creation of fire-fighting systems is established by the National Unification body UNI;
- the UNI 9490 standard concerns equipment for automatic fire-fighting sprinkler systems
- the UNI 10779 standard concerns the design and installation of fire-fighting systems with hydrant networks
Other references for building fire-fighting pressure sets are contained in UNI 9489 standard
“Sprinkler fire extinguishing systems”.
The customers, designers, producers, installers, testers and public control and security bodies are bound to comply
with the UNI standards.
The UNI 9490 and UNI 10779 standards describe the standards of the fire-fighting systems, regarding installation
features of both automatic pumps and systems.
A pump group station must be foreseen and used exclusively for fire-fighting purposes, having at least one bordering
wall with uncovered space.
The temperature within the pumping station must not be below:
+ 4°C if only electric pumps are installed
+ 10°C if Diesel motor-pumps are installed
When Diesel motor-pumps are installed, the room must have a ventilation system that prevents the temperature rising
above 40°C.
COMPOSITION OF UNI 9490-10779 SETS
The units comprise:
a) one or two main pumps operated by motors or Diesel engines (UNI 9490 4.9.2.2).
The motor-pump connection must (P1) (P2) allow the hydraulic assembly (the real and proper pump) to be
dismounted from the motor.
b) compensating pump, if present (P3).
The compensating pump, also known as the pilot pump, compensates the small pressure drops in the fire fighting
system caused by dripping, leaks, etc.
c) a control panel for each pump (1) (2).
Each electric pump has its own electrical panel (UNI 9490 4.9.4.7.) powered by separate lines
(UNI 9490 4.11.3.3.d). The diesel pump is independently fuelled (diesel tank for 60 hours autonomy) and started with
two batteries, constantly charged thanks to a double battery charger.
d) Starting device for each pump (5).
The starting device, comprising a pressure switch for each pump, must start the pump at a pressure ranging from
between 75% and 85% of the pump pressure with the delivery closed (UNI 9490 4.9.3.4.).
e) various hydraulic accessories (valves, stub pipes, manifolds, etc.)
- The shut-off valves must show whether they are open or closed (UNI 10779 6.3) and must also be lockable
(UNI 9490 5.1.4.).
- The check valves on the pump delivery side are inspectable (UNI 9489 8.4.).
- The full scale of the pressure gauges must reach 150% of maximum operating pressure.
- Flow meters must comply with UNI ISO 2548 - 3555 with a tolerance of 5%.
- The rated pressure of the system components must be at least PN 12 (UNI 10779 6.1)
Each pump has its own suction line (UNI 4.9.3) while the same delivery manifold is used for all the pumps.
All the above is mounted on the galvanised steel base. This must:
- support and align the various components in the set
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