Pressure boosting system as a fully automatic compact unit for fire fighting purposes in accordance with EN 12845.

Consisting of a pump with horizontal base frame - EN 733 - with spacer coupling, diesel motor and diaphragm pressure vessel (capacity: 20 l) and one switch cabinet, fixed to a robust support structure.

Model EC-Fire D for the diesel motor, equipped with Easy Controller, solid construction made of special profiled parts with cut-outs for forklift trucks and hooks to ensure trouble-free, safe transportation. Height-adjustable bracket for the outlet manifold and special base plate for the diesel motor which reduces the transfer of vibrations considerably and increases the reliability and service life.

A circuit with dual pressure switch, pressure gauge, non-return valve, valve (secured from use by unauthorised personnel) for the main pump for automatic start. The cables are concealed in the construction and protected against bumps and cuts. Equipped with a diaphragm installed directly on the main pump housing as standard, to prevent overheating in the event of zero flow.

Fuel tank with level sensor and sufficient volume for six hours of autonomous operation, as well as 2 batteries on the base frame and battery charging units on the EC-Fire switch cabinet.

Independent anti-vibration base frame for the diesel motor pump.

EC-Fire D switchgear for fire extinguishing systems according to EN 12845.

Switchgear integrated in a sheet metal enclosure in accordance with protection class IP54.

Optimum regulation and ease of use by EC-Fire control with direct display of the current operating status, with symbol-based multilingual LCD display, easy user interface with simple menu navigation, buttons for quick setting of parameters. Communicative controller for monitoring system operation.

The system has been mounted on the base frame with wires and pipes are ready for connection.

Inlet pressure:

The maximum inlet pressure must be taken into account when designing the system configuration (see Technical data). The maximum permissible inlet pressure is calculated from the maximum operating pressure of the system minus the maximum pumping head of the pump at Q = 0. For sprinkler systems in accordance with EN 12845, the water pressure should not exceed 12 bar. In sprinkler systems with a pronounced slope, in which the difference in height between the highest and lowest sprinkler is more than 45 m, the water pressure can be higher than 12 bar at the pump outlet or in the piping, provided that all of the system components are designed for this pressure level.

Installation of the pressure boosting pump under suction conditions.

For the main pump, it is necessary to install a supply tank with connection to the discharge pipe above the pump.

Volume flow

Up to 350 m³/h (97 l/s) system configuration for the main pump.

Switchgear/control device for fire water supply systems

Wilo-Control EC-Fire D (main pump with diesel motor)

Hardware:

Fully electronic central control unit, installed in a painted steel enclosure, protection class IP54, control and display devices on the front door

Features and functions:

The design of the control device depends on the power of the connected pump. The device comprises the following components:

• Main switch: For switching the switchgear on and off. (For unauthorised use in the event of a fire)
• Display: Display built into the door of the switch cabinet for operation and display purposes. Shows the operating data and the operating status of the pump and the controller using symbols. Menus are selected and parameters entered using the buttons on the front door
• Microprocessor: Microprocessor PLC realised by programming, power supply unit and I/O wiring. The configuration of the programming depends on the system and the sprinkler system
• Indicators: Longlife signal lamps which indicate the following: Operation of the pump, activation of the pressure switch, activation of the float switch, deactivation of automatic mode, deactivation of the motor heater, temperature alarm, oil pressure alarm, false start, belt alarm, low fuel level, running battery charger, low battery status, battery charger alarm, manual stop
• Buttons: Push button for manual stop, manual start battery A, manual start battery B, lamp test and acknowledgement of alarms and warning messages, as well as menu selection
• Fuse protection: Fuses for heating and battery charging unit in the switchgear
• Motor startup: Automatically via 2 alternating batteries or directly with the start button on the front panel
• Motor protection: Monitoring of typical operating parameters of the diesel motor (temperature, oil pressure, etc.) without stopping
• Performance monitoring: Speed monitoring of the diesel engine
• Battery monitoring: Monitoring of charging voltage, charging current and charging errors
• Monitoring of the water supply: By means of a float switch to ensure a minimum water level of 2/3 of the supply tank is always maintained
• Monitoring of the power supply: Error message from the battery charging unit in the event of a failure of the power supply
• Combined signal report: All types of error are displayed via a common error indicator
• Individual signal report: Important individual errors are indicated via individual error indicators
• Error message and acknowledgement: All error messages are indicated by LEDs, and must be acknowledged

Software:

• Factory-programmed for fully automatic operation
• Information regarding motor speed, charging voltage and charging current.
• Menu navigation with clear text display

Conforms to the following standards:

• Fixed Firefighting Systems - Automatic Sprinkler Systems - (EN 12845), part for pumps with diesel motor
• Electrical Equipment of Machines (EN 60204-1)
• Low-voltage Switchgear and Controlgear Assemblies (EN 61439-1 and EN 61439-2)
• EMC - Electromagnetic Compatibility for Industrial Environments (EN 61000-6-2)
• EMC - Emission Standard for Residential, Commercial and Light-Industrial Environments (EN 61000-6-3)

Function description:

Wilo EC-Fire D control devices can be used to control pumps with a diesel motor, sensors for pump management and the level of information. The microprocessor-controlled switchgear is used to control and regulate all required functions of a pressure boosting system according to EN 12845, for test purposes or actual sprinkler events.

The operating logic for the fire extinguishing unit is based on the cascade calibration of the pressure switches for starting the pump. The pressure in the system decreases if a large quantity of water is requested due to the opening of one or more circuits or due to a defective sprinkler. As a result, the main pump is started using switchgear.

As soon as the sprinkler circuit or gate valve, via which the sprinkler heads are supplied, is closed, pressure is built up in the system. The stop buttons on the front door must then be pressed to stop the pump.