Overfloor Fire Protection

Features and Operating Principle

The Suction Lift system consists of an underground water reserve and a technical room complete with a suction lift fire-fighting unit positioned at a higher elevation that does not allow 2/3 of the useful volume to be above the axis of the main pumps. The proposed fire-fighting water storage reserves are monolithic reinforced concrete structures and can be installed underground and suitable for heavy traffic (Class 1 vehicles); the underground fire tanks are connected to each other through connection holes positioned at the bottom, in which various types of fittings with watertight gaskets, stainless steel pipe stubs or sleeves, EPDM, PVC, HDPE, etc., are inserted.
The fire-fighting monolithic blocks manufactured by Edil Impianti2 can be entirely treated with waterproof elastic cementitious paints and mortars.
These prefabricated monolithic units allow for large storage capacities capable of satisfying various requirements.
Building a fire-fighting system with prefabricated underground tanks is a fast, safe method with significant savings in construction time and high safety for workers on the construction site.
The prefabricated fire tanks produced by Edil Impianti2 can be supplied with thickened walls, increased reinforcement, and anti-buoyancy rebar.
The monolithic prefabricated concrete tanks can be supplied complete with a pressurization system inside the Service Compartment-Technical Room, which is fully equipped hydraulically and electrically, with the issuance of a certificate of declaration of conformity according to Ministerial Decree 37/2008.
The technical room is supplied complete with UNI 11292:2019 certification and anti-seismic structural documentation prepared and signed by a qualified professional, along with everything necessary to ensure the technical compartment is up to code.
Edil Impianti2 supplies pressurization units complete with testing and commissioning.
The pressurization systems installed are selected from the best brands available on the market today or based on the specific request of the designer and the final client.

Supply Specifications

The Above-Ground Firefighting System is composed as follows:

Supply and installation of a Prefabricated Underground Firefighting Water Tank/Water Reserve compliant with UNI 12845, manufactured as a DECLARED SERIES, code VASCANT_INT12845, with walls of __ cm thickness and a base of __ cm thickness. It is produced by EDIL IMPIANTI 2 S.r.l. with a UNI EN ISO 9001 and ISO 45001 management system, made of monoblock Vibrated Reinforced Concrete, reinforced with vertical pillars and horizontal stainless steel braces. It features an Elastocolor protective anti-cracking elastomeric paint on the external concrete walls, which has high permanent elasticity and high chemical resistance. The concrete is of compression resistance class C45/55 (RCK >55 N/mm²), and the internal reinforcements are made of steel with improved adhesion, controlled at the factory, and a B450C-type square-mesh electro-welded wire fabric. It is also supplied with CHEMICAL RESISTANCE and REACTION TO FIRE (class: A1) certifications issued by an external body in accordance with UNI EN standards.

N.__ x cm. ___x___xh___ + cover h__;
Total tank capacity equal to __ m³;
Internal USEFUL capacity according to UNI EN 12845 greater than __ m³.

The Underground Firefighting Tank is supplied with:

• n.1 AISI 304 stainless steel sleeve, 2" diameter, for connecting the mains water replenishment pipe;
• n.2 sleeves for 110 mm diameter PVC pipes for the creation of the overflow drain and air vent pipes;
• n.1 walkable cover slab for heavy traffic;
• 60x60 cm light inspection slots.

Supply and installation of a Prefabricated Above-Ground R60/A1 Fire Technical Room in compliance with UNI 11292 produced in DECLARED SERIES, with external dimensions of cm.___x___xh___ sloped, with walls of thickness cm.__ and a base of thickness cm.__ , manufactured by EDIL IMPIANTI 2 S.r.l. with a management system UNI EN ISO 9001 and ISO 45001, made of single-block Vibrated Reinforced Concrete, reinforced if necessary with vertical pillars and horizontal braces in stainless steel, concrete in compression resistance class C45/55 (RCK >55 N/mm²), internal reinforcement in controlled high-adherence steel and square mesh electro-welded mesh type B450C and reinforced with GREESMIX5® 3D steel fibers (Patent N.0001421398 issued by the Ministry of Economic Development), complete with CHEMICAL RESISTANCE and REACTION TO FIRE certifications (class: A1) issued by an external body according to UNI EN standards.
The Above-Ground Technical Room is supplied complete with:

• n.1 R60 access door with minimum dimensions cm.90x205 in A1 class steel sheet;
• provision for internal room ventilation;
• internal anti-wear treatment and painting (white color);
• external wall protective coating with anti-cracking elastic paint (RAL 7040 grey);
• sloped cover slab with drip edge, completely waterproofed and sealed to the technical room below.

Above-Ground Technical Compartment Set-up compliant with UNI 11292 standard complete with:
- general control panel for pressurization unit power supply and utilities;
- internal wiring of all accessories, pumps, main light + emergency light, single-phase industrial power socket;
- n. portable rechargeable emergency lamp/s with min. 2h autonomy complete with wall support shelf and signaling sign;
- natural ventilation grille/s in aluminum with fixed fins and anti-insect protective mesh;
- fan coil unit for compartment heating;
- n.1 powder extinguisher + n.1 C02 extinguisher complete with wall bracket and signaling sign;
- sprinkler protection system complete with CE marked flow switch according to EN12259-5 for alarm relay;
- sprinkler test and drain line with valve and 20 mm outlet orifice;
- microswitch for signaling the status of isolation valves;
- junction box with terminal block for alarms to be relayed to a manned location;
- double steel frame for Priming Tanks Housing;
- n.2 500 lt priming tanks;
- pump/tank priming kit complete with all piping and valves;
- fan/extractor complete with overpressure damper;
- UPS backup unit complete with batteries to ensure the operation of the fan;
- diesel motorpump exhaust fumes discharge/outdoor kit made with insulated stainless steel pipe protected with A1 class materials;
- floor water presence sensor;
- water level control and alarm kit: constant display of water storage level status and detection of minimum and maximum water level in the tank, alarm signals are available on the terminal block for relay to a manned location;
- bottom drainage for connection to the sewer system;
- ground anchoring of the pumping units to ensure their stability and alignment over time, and with mechanical characteristics capable of withstanding unit vibration during operation;
- suction lines with corresponding bend, anti-vortex plate, and filter made of AISI304;
- recirculation return line to the tank for flow rate testing made of AISI304 complete with valves;
- diaphragm circuit line complete with flow indicator UNI EN 12845 10.5 to visualize the passage of water and service during zero-flow operation, made of AISI304;
- isolation valves with position indicator and lockable UNI 11443;
- flanged manifold made of AISI304 complete with isolation valve;
- documentation related to the heating system, ventilation system, normal, emergency, and safety lighting system, back pressure of diesel engine exhaust gases, remote alarm signaling, flow diagram (P&I), equipment layout to be displayed in the compartment, use and maintenance manual with relative control lists.
All accompanied by system compliance according to Legislative Decree 37/08.
The supplied compartment will be able to maintain satisfactory temperature and humidity conditions throughout all seasons and will ensure temperature and humidity values capable of preventing dew and/or condensation formation.

Pre-assembled Fire Pump Set according to UNI EN 12845 (Above/Below Water Level Suction) composed of:
N° 1 main electric pump,
N° 1 main diesel pump, and one jockey pump.

The operation of the main pump modules (PUMP SET) is completely independent.
In case of a pressure drop that cannot be compensated by the limited flow rate of the pilot electric pump (jockey pump), the main pump starts automatically.
The shut-down of the main pump is **manual only** via a switch on its respective control panel, as required by UNI EN 12845. Automatic shut-down of the main pumps is only permitted for sets exclusively serving hydrant systems according to UNI 10779, based on the criteria outlined in UNI 10779 A 1.2. 

MAIN ELECTRIC PUMP
END SUCTION, single-impeller, normalized centrifugal pump, horizontal axis, **BACK PULL OUT** type, with volute casing and independent bearing frame; axial suction and radial discharge UNI EN 12845 10.1
Pump Casing in Cast Iron EN GJL 250
Impeller and Shaft in Stainless Steel
Mechanical Seal in ceramic/graphite
Pump-Motor connection via a spacer flexible coupling complete with safety guard UNI EN 12845 10.1
Pump/Motor set installed on a base frame made of metallic profiles, connection via a spacer flexible coupling, complete with safety guard UNI EN 12845 10.1
ELECTRIC MOTOR
Three-phase asynchronous, closed, externally self-ventilated motor with squirrel cage rotor
INSTALLED POWER (kW) __ Power calculated based on the power absorbed at the point on the characteristic curve corresponding to an NPSH of 16m UNI EN 12845 10.1
FLOW RATE (m³/h) __
HEAD (mca) __ (metres of water column)
NPSH (m) __
VOLTAGE 400/690 V, 50Hz
PROTECTION RATING IP 55
ROTATION SPEED 2900 rpm (revolutions per minute).

MAIN DIESEL PUMP SET
Pump/Motor set installed on a base frame made of metallic profiles, connection via a universal joint (cardan shaft) complete with safety guard UNI EN 12845 10.1
INTERNAL COMBUSTION ENGINE 
The engine power is the **NOMINAL CONTINUOUS** power dimensioned according to ISO 3046 in compliance with UNI EN 12845 10.9.1
INSTALLED POWER (kW)__ in NA curve Power calculated based on the power absorbed at the point on the characteristic curve corresponding to an NPSH of 16m UNI EN 12845 10.1
MAKE AND MODEL ____ or similar with direct air cooling
FLOW RATE (m³/h) __
HEAD (mca) __
NPSH (m) __
ROTATION SPEED 2900 rpm
Double-walled TANK on stand __ l with inner wall in AISI 304 UNI 11292 7.2.

JOCKEY PUMP
Jockey Pump kit kW _ at __ mca
Pump Casing and Motor Support in Cast Iron
Impeller in Brass
Diffuser in Noryl
Shaft in Stainless Steel 
Mechanical Seal in ceramic/graphite
Three-phase asynchronous ELECTRIC MOTOR 
INSTALLED POWER (kW) __
VOLTAGE 400 V 50Hz
ROTATION SPEED 2900 rpm.

MAIN ELECTRIC PUMP CONTROL PANEL
The electrical panel controls and monitors pump sets with electric and diesel pumps compliant with UNI EN 12845.
Assembled in a painted sheet metal enclosure with IP54 protection rating, built according to current CEI standards and compliant with the requirements of UNI EN 12845.
MAIN FEATURES
High vibration resistance
USB type A port for downloading stored data
Jockey pump monitoring (see jockey pump panel) Water storage tank level monitoring
Valve position monitoring
Sprinkler flow switch monitoring
Local drainage pump monitoring
Ambient temperature visible on display
Engine bulb monitoring
Oil and water temperature visible on display
Oil pressure visible on display
Message screen.
GENERAL FEATURES
Power supply 3P+N 400V±10% 50/60Hz
N°2 Battery chargers for charging and controlling batteries 6A 12Vdc for engines up to 102kW, 10A 12Vdc for engines up to 222kW, 10A 24Vdc for engines over 222kW
Engine Inhibition Switch “0 – 1”
4-20 mA signal input from level transmitter
Emergency start buttons from battery
Contactors dimensioned in AC3
Class II Transformer
Motor protection fuses
Auxiliary protection fuses
General disconnector with door interlock
Metallic enclosure
Terminal block User Manual
Wiring diagram and EC declaration.

WIRING ELECTRIC CABLES
The wiring within the set is made with FG16 OM16-0.6/1 kV type cables.

DISCHARGE MANIFOLD
The manifold consists of the following components:
N°1 lug-type butterfly isolation valve with position indicator, possibility of locking, and manual gearbox where required
N°1 inspectable check valve (non-return valve) of the swing-check type with reduced pressure losses
N°1 diaphragm recirculation circuit (continuous water flow) for cooling the main pumps during zero-flow operation, thereby preventing the pumps from overheating. UNI EN 12845 10.5.

DUAL PRESSURE SWITCH CIRCUIT
This component is required for the automatic starting of each main pump UNI EN 10.7.5.
Each circuit is composed of:
N°2 dual-scale pressure switches
N°1 pressure gauge class 1.6 Diameter 80 EN 12845 8.5.2 TR/11438:2016 6.1.4
N°1 check valve (non-return valve)
N°1 drain valve
JOCKEY PUMP AUTOMATIC START AND STOP CIRCUIT
The circuit is composed of:
N°1 dual-scale pressure switch
N°1 pressure gauge class 1.6
N°1 check valve
N°1 isolation valve
N°1 20 l / 16 bar diaphragm tank (pressure tank)
TIMED SHUTDOWN UNI 10779

REMOTE ALARM ELECTRICAL PANEL UNI EN 12845 10.8.6.2
The electrical panel performs remote supervision of pump sets with diesel pumps, electric pumps, and emergency power supplies compliant with UNI EN 12845.
Possibility of integrating a GSM message sending board (upon request).
Supplied loose, to be installed on-site by the installer.
To be installed in a permanently manned area UNI EN 12845 10.8.6.2.

FLOW METER WITH ANTI-CLOGGING CIRCUIT
Remote reading flow meter DN__ - up to __m³/h UNI EN 12845 8.5.2 for vertical/horizontal installation. Accuracy ~ 5% of full-scale value.

FUEL TANK UNI EN 12845 10.9.6 - UNI 11292 6.10.1
Double-walled fuel tank, with inner wall made of stainless steel to eliminate the risk of pipe clogging due to oxidation residues, capable of ensuring an operating autonomy of 6 hours at full power.

SUCTION MICROSWITCH KIT
Limit switches for ON/OFF status monitoring of the main pump suction valves As per UNI EN 12845 H2.2

DISCHARGE MICROSWITCH KIT
Limit switches for ON/OFF status monitoring of the main pump discharge valves As per UNI EN 12845 H2.2.

The supply includes the following Fire Protection Documentation:
- electrical design by a qualified professional;
- internal lighting design by a qualified professional;
- internal ventilation and temperature design by a qualified professional;
- plumbing declaration of conformity (Di.Co) according to D.M. 37/2008;
- electrical declaration of conformity (Di.Co) according to D.M. 37/2008;
- operation and maintenance manual for the installed machines and the technical room;
- as-built layout project and P&ID flow diagram.

Specific report for fire reaction and resistance R60 signed by our qualified technician.
Fees, payments, duty stamps, and filing with public offices are excluded.

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Configure the Supply Specification with the related accessories.

Overfloor Fire Protection Dimensions