UNI 9490-10779 1-2 KDN FIRE-FIGHTING UNITS WITH 1-2 KDN DIESEL PUMPS WITH DIESEL MOTOR GENERAL DATA These are UNI 9490-10779 compliant pressurisation units for delivering water to fire-fighting systems. The standard version comprises: - a diesel pump and a standardised pump <strong>plus</strong> compensating pump (if present) - a diesel pump and a compensating pump (if present) The units comprise two separate and modular assemblies which can be connected together; diesel pump assembly + electric pump assembly. This prevents the assemblies from having to be dismounted and remounted if they are installed in restricted spaces, go through narrow doors, etc. The diesel pump assembly can also be installed after the electric pump assembly. 146 ®
CONSTRUCTIONAL CHARACTERISTICS BASEPLATES Galvanised steel baseplate for the electric pump, pilot pump and control panels. Galvanised steel support for Diesel pump and control panel with anti-vibration feet. DIESEL PUMPS KDN standardised centrifugal pumps connected to a Diesel motor with a flexible coupling (*), performances and dimensions in accordance with DIN-EN 733 (ex DIN 24255) Axial suction port, radial discharge port, pump body in cast iron, impeller in cast iron equilibrata dinamicamente, carbon/silicon carbide mechanical seal. (*) Direct injection diesel engine allowing overloading up to 10% on all the curve of the pump (UNI 9490 4.9.5.1) connected with an elastic joint to the standardised pump. The fuel tank is large enough to guarantee 6 hours of operation (UNI 9489 13.6.2.5.). Air-cooled for versions up to 43 kW, water-cooled over 43 kW. ELECTRIC PUMPS Standardised enbloc NKP-G centrifugal electric pumps with joint, coupled to a three-phase asynchronous motor, performance and size compliant with DIN-EN 733 (formerly DIN 24255). Axial suction port, radial discharge port, pump body in cast iron, impeller in cast iron equilibrata dinamicamente, carbon/silicon carbide mechanical seal. Asynchronous, closed 2-pole motor, cooled by external ventilation, built to B3/B5 (other type of pumps available on request). PILOT PUMP JET 251 centrifugal self-priming pump. Cast iron pump body, impeller, diffuser and venturi tube in technopolymer. Asynchronous, closed 2-pole motor, cooled by external ventilation. HYDRAULIC PART Separate suction lines for each pump, complete with vacuum pressure gauge. Delivery of each main pump to the manifold with: connections for suction tanks, pressure gauge, pump running pressure switch, inspectable check valve with upline leak test tap, connector for rate of flow indicator, shut-off batterfly valve, galvanised steel delivery manifold with starting pressure switches and 15 bar expansion tank. Pilot pump with ball valve on suction and delivery sides, check valve on the delivery side, starting pressure switch, hose connection to the delivery manifold of the main pumps. The two manifolds of the diesel pump assembly and the electric pump assembly can be joined together with a single manifold supplied with the unit. The size of the hydraulic part is compliant with UNI 9490 - UNI 9489 - UNI 10779. ELECTRICAL CONTROL PANELS One IP 55 control panel for diesel pump with control unit with front-of-panel indicator LED's, general switch, rev counter, hour counter, 2 voltmeters and 2 ammeters for battery chargers, two 12 Volt starting batteries with 2 battery chargers, AUT-0-MAN selector, STOP button, recessed selector for operation to UNI 10779. One IP 55 control panel for main electric pump with front-of-panel indicator LED's, general switch, fuses, starting contactors for electric pumps (direct up to 7.5 kW - star delta over 7.5 kW), voltmeter and ammeter, AUT-0-MAN selector, STOP button, recessed selector for operation to UNI 10779 (*), 1 outlet with switch. Alarm contacts inside terminal box for pressure drop, manual selector, motor fault, battery fault are to be connected to an acoustic device (supplied with the booster set) Connector for weekly test unit (only for electric pumps). (*) Only for hydrants systems which are not constantly supervised, the pumps stop AUTOMATICALLY after “pressure remains constantly higher than the pump starting pressure for at least 20 minutes” (UNI 10779 A.1.2). 147 ®