Underfloor Fire Protection with Vertical Pumps

Premessa

La nuova gamma di pozzetti "IDRIKO" è composta da elementi prefabbricati in cemento armato prodotti dalla Edil Impianti2 con materiali certificati CE.
La caratteristica principale di IDRIKO è quella di resistere alla esposizione/contatto con liquidi e ambienti potenzialmente aggressivi SENZA la necessità di resinatura e\o trattamenti impermeabilizzanti protettivi.

Caratteristiche e Funzionamento delle camerette in cemento

La progettazione è stata eseguita per effettuare il montaggio su nuove condotte o collettori fognari esistenti, il peso è stato calcolato in modo da consentire la posa in opera con mezzi meccanici di piccole dimensioni. La predisposizione dei moduli (base+prolunga+lastra di copertura) con impronte indebolite o fori carotati sulle pareti verticali permette il montaggio con tubazioni provenienti da tutte le direzioni e da quote diverse. La struttura fibrorinforzata realizzata con fibre d'acciaio GREESMIX5® (Brevetto N.0001421398 rilasciato dal Ministero dello Sviluppo Economico) è idonea a grandi profondità e a interramenti eccezionali, è inoltre completo di lastra di copertura carrabile per mezzi pesanti (prima 1a categoria stradale) dotata di fori ispezionabili (passo d'uomo) standard cm.60 o su misura.

Voce di Capitolato

The Below-Grade Fire-Fighting System with Vertical Pumps is composed as follows:

Supply and installation of a prefabricated Underground Fire-Fighting Tank/Water Reserve compliant with UNI 12845 standard, consisting of an enlarged depth collection tank to ensure the minimum submergence level for the pumps and the traditional water reserve. It is produced as a DECLARED SERIES, code VASCANT_INT12845, with walls of __ cm thickness and a bottom of __ cm thickness, manufactured by EDIL IMPIANTI 2 S.r.l. under a UNI EN ISO 9001 and ISO 45001 management system. It is made of monoblock Vibrated Reinforced Concrete, reinforced with vertical pillars and horizontal stainless steel tie rods, featuring an Elastocolor elastomeric protective anti-cracking paint on the external concrete walls for high permanent elasticity and excellent chemical resistance. The concrete is of compressive strength class C45/55 (RCK >55 N/mm²), with internal reinforcements of improved adhesion steel inspected at the factory and B450C type square mesh electro-welded steel fabric. It is accompanied by CHEMICAL RESISTANCE and REACTION TO FIRE (class: A1) certifications issued by an external body according to UNI EN standards.

No.__ x cm. ___x___xh___ + cover h__; 
Total tank capacity equal to __ mc;
Internal USABLE capacity according to UNI EN 12845 greater than __ mc.

Underground Fire-Fighting Tank equipped with:

• no.1 AISI 304 stainless steel sleeve diam.2” for connection to the water main refill pipe; 
• no.2 PVC pipe sleeves diam. 110 mm for the construction of the overflow discharge pipe and air vent;
• no.1 walkable/driveable cover slab for heavy traffic;
• inspection slots light cm.60x60.

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 Room Setup with Negative Suction Lift according to UNI 11292 complete with:
- main power supply panel for the pressurization unit and services;
- internal wiring of all accessories, pumps, main lighting + emergency lighting, industrial-type single-phase power socket;
- portable rechargeable emergency lamp(s) with min. 2 h autonomy, complete with wall support bracket and warning sign;
- natural ventilation aluminum louver(s) with fixed blades and insect protection mesh;
- convector heater for room heating;
- n.1 powder extinguisher + n.1 CO2 extinguisher, complete with wall support and warning sign;
- sprinkler protection system complete with CE-marked flow switch according to EN12259-5 for alarm reporting;
- sprinkler test and drain line with valve and 20 mm outlet orifice;
- microswitches for monitoring the status of shut-off valves;
- junction box with alarm terminal block to be reported to a supervised location;
- fan/extractor complete with overpressure damper;
- UPS backup power supply complete with batteries to guarantee fan operation;
- motor pump exhaust/external flue kit made with insulated stainless steel pipe protected with Class A1 materials;
- floor water presence sensor;
- water level and alarm control kit: constant display of water storage level status and detection of minimum and maximum water levels in the tank; alarm signals are available in the terminal block for remote transmission to a supervised location;
- floor drain for connection to the sewage system;
- floor anchoring of the pumping units to ensure stability and alignment over time, with mechanical characteristics capable of withstanding the unit's vibration during operation;
- suction lines with relative elbow, anti-vortex plate, and filter made of AISI 304;
- tank return recirculation line for flow testing made of AISI 304, complete with valves;
- diaphragm circuit line complete with flow indicator UNI EN 12845 10.5 to visualize water passage and service during zero-flow operation, made of AISI 304;
- shut-off valves with position indicator and lockable according to UNI 11443;
- flanged manifold made of AISI 304 complete with shut-off valve;
- documentation relating to the heating system, ventilation system, normal, emergency and safety lighting systems, backpressure of diesel engine exhaust gases, remote alarm signaling, flow diagram (P&ID), equipment layout to be displayed in the room, operation and maintenance manual with relative checklists.
Everything accompanied by system declarations of conformity according to Legislative Decree 37/08.
The provided room will be capable of maintaining satisfactory temperature and humidity conditions in all seasons and will guarantee temperature and humidity values capable of preventing the formation of dew and/or condensation.

Pre-assembled Fire-Fighting Pressurization Unit according to UNI EN 12845 Negative Suction Lift installation for Vertical Pumps consisting of:
N° 1 main electric pump,
N° 1 main diesel pump and jockey pump.

The operation of the main pump modules (PUMP SET) is completely independent.
In the event of a pressure drop that cannot be compensated by the limited flow rate of the jockey electric pump, the main pump starts automatically.
The shutdown of the main pump is manual only, via a switch located on the relative control panel as required by UNI EN 12845. Only in the case of units serving exclusively hydrant systems according to UNI 10779, automatic shutdown of the main pumps is possible, according to the criteria provided by UNI 10779 A 1.2. 

MAIN ELECTRIC PUMP
Pump/motor unit installed on a metal profile baseframe, connection via spacer elastic coupling, complete with safety guard UNI EN 12845 10.1
Mixed-flow vertical axis VTP pump, cast iron pump body connected to the control unit through the shaft line. Cast iron control unit. The control unit is equipped with an anti-rotation device to prevent counter-rotation of the machine during the drainage of the shaft line. Including the shaft line up to a maximum length of 4 m.
Cast iron pump body EN GJL 250
Impeller and Shaft in stainless steel
Ceramic/graphite mechanical seal
ELECTRIC MOTOR
Three-phase asynchronous, closed, externally self-ventilated with squirrel-cage rotor
CONTROL HEAD
Allows the coupling of the shaft line with the UNEL-IEC V1 standardized electric motor. Cast iron construction. Independent support with thrust bearings. Pump/motor connection by means of an elastic coupling equipped with a device against reverse rotation.
INSTALLED POWER (kW) __ Power calculated based on the power absorbed at the point of the characteristic curve corresponding to an NPSH of 16m UNI EN 12845 10.1
FLOW RATE (m³/h) __
HEAD (mwc) __
NPSH (m) __
VOLTAGE 400/690 V, 50Hz
PROTECTION DEGREE IP 55
ROTATION SPEED 2900 rpm.

MAIN MOTOR PUMP
Pump/motor unit installed on a metal profile baseframe, motor pump connection via cardan joint complete with safety guard UNI EN 12845 10.1
Mixed-flow vertical axis VTP pump, cast iron pump body connected to the control unit through the shaft line. Cast iron control unit. The control unit is equipped with an anti-rotation device to prevent counter-rotation of the machine during the drainage of the shaft line. Including the shaft line up to a maximum length of 4 m.
ENDOTHERMIC ENGINE
The engine power is the CONTINUOUS RATED power dimensioned according to ISO 3046 in compliance with UNI EN 12845 10.9.1
RIGHT-ANGLE GEAR DRIVE for the main motor pump for coupling the shaft line with the diesel engine. 
CARDAN JOINT
The use of the cardan joint prevents the transmission of vibrations between the diesel engine and the bevel gear of the right-angle drive.
INSTALLED POWER (kW)__ on NA curve
MAKE AND MODEL ____ 
FLOW RATE (m³/h) __
HEAD (mwc) __
NPSH (m) __
ROTATION SPEED 2900 rpm
FUEL TANK on stand from __ l double-walled with AISI 304 stainless steel inner wall UNI 11292 7.2.

JOCKEY PUMP
Jockey Pump kit kW __ from __ mwc
Cast iron pump body and motor support
Brass impeller
Noryl diffuser
Stainless steel shaft 
Ceramic/graphite mechanical seal
Three-phase asynchronous ELECTRIC MOTOR 
INSTALLED POWER (kW) __
VOLTAGE 400 V 50Hz
ROTATION SPEED 2900 rpm.

MAIN ELECTRIC PUMP CONTROL PANEL
The electrical panel performs the command and control of pumping units with electric pumps and motor pumps compliant with the UNI EN 12845 standard.
Assembled in a painted sheet metal box with IP54 protection degree, built according to current CEI standards and compliant with the requirements of the UNI EN 12845 standard.
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+E 400V±10% 50/60Hz
N°2 Battery chargers for battery charging and monitoring 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 sized in AC3
Class II transformer
Motor protection fuses
Auxiliary protection fuses
Main disconnect switch with door interlock
Metallic enclosure
Terminal block
User manual
Wiring diagram and CE declaration.

ELECTRICAL WIRING CABLES
The wiring inside the unit is made with FG16 OM16-0.6/1 kV type cables.

DELIVERY COLUMN
The column consists of the following components:
N°1 lug-type butterfly shut-off valve with position indicator, locking capability, and manual gear operator where required
N°1 inspectable swing check valve with low pressure drop
N°1 recirculating orifice circuit (continuous water flow) for cooling the main pumps during zero-flow operation to prevent overheating of the pumps. UNI EN 12845 10.5.

DOUBLE PRESSURE SWITCH CIRCUIT
The component is necessary for the automatic starting of each of the main pumps UNI EN 10.7.5.
Each circuit consists of:
N°2 dual-scale pressure switches
N°1 class 1.6 pressure gauge, 80 mm Diameter EN 12845 8.5.2 TR/11438:2016 6.1.4
N°1 check valve
N°1 drain cock

JOCKEY PUMP AUTOMATIC START AND STOP CIRCUIT
The circuit consists of:
N°1 dual-scale pressure switch
N°1 class 1.6 pressure gauge
N°1 check valve
N°1 shut-off valve
N°1 20 l / 16 bar membrane expansion tank
TIMED STOP UNI 10779

REMOTE ALARM ELECTRICAL PANEL UNI EN 12845 10.8.6.2
The electrical panel performs remote supervision of pumping units with motor pumps, electric pumps, and UPS units compliant with the UNI EN 12845 standard
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 AISI 304 stainless steel inner wall to eliminate risks of pipe clogging due to oxidation residues, capable of guaranteeing a full-power operating autonomy of 6 hours.

SUCTION MICROSWITCH KIT
Limit switch contacts for ON/OFF monitoring of the main pumps' suction valve status as per UNI EN 12845 H2.2

DELIVERY MICROSWITCH KIT
Limit switch contacts for ON/OFF monitoring of the main pumps' delivery valve status 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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