SiFire EN N 32/250-235-26.5/1.1 DJ

Pressure boosting system as a fully automatic compact unit for fire fighting purposes in accordance with EN 12845 and equipment for the Nordic regions.

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

Model SC-Fire D for the diesel motor, equipped with Smart Controller, plus model SC-Fire J for the jockey pump, 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 frame 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 (with position switch 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.

Water/water heat exchanger, fuel tank with level sensor and sufficient volume for six hours of autonomous operation, as well as 2 or 4 batteries on the base frame and battery charging unit on the SC-Fire switch cabinet.

The diesel motor pump is tested for 1.5 hours under operating conditions.

Switchgears SC-Fire D and SC-Fire J for fire extinguishing systems in accordance with EN 12845.

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

Optimum regulation and ease of use by SC-Fire control with symbol-based LC display, easy user interface with simple menu navigation, push buttons and rotary knob for quick setting of parameters. Communicative control unit 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 delivery 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 750 m³/h (208 l/s) system configuration for the main pump.

Switchgear/control device for fire water supply systems

Wilo-Control SC-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 control unit using symbols. Menus are selected and parameters entered with the red push button
• 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, collective error as well as a manual start and manual stop
• Buttons: Push button for manual stop, start battery A, start battery B, the lamp test and acknowledgement of alarms and warning messages
• Fuse protection: Fuses for heating and battery charging unit in the switchgear
• Motor startup: Automatic starting sequence with 6 start attempts via two 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 motor
• Battery monitoring: Monitoring of charging voltage, charging current and breakdown of the charging unit
• 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, displayed simultaneously as error codes and must be acknowledged

Software:

• Factory-programmed for fully automatic operation
• Information regarding motor speed, charging voltage and charging current.
• Menu navigation with plain text display (symbol representation)

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)
• Electromagnetic compatibility (EMC) — Immunity for industrial environments (EN 61000-6-2)
• Electromagnetic compatibility (EMC) — Emission standard for residential, commercial and light-industrial environments (EN 61000-6-3)

Function description:

Wilo SC-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 system 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.

Wilo-Control SC-Fire J (jockey pump with electric motor)

Hardware:

Fully electromechanical control unit, installed in a painted steel enclosure, protection class IP54, control devices and buttons 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
• Indicators: Longlife signal lamps, which indicate the operational readiness of the pump, operation of the pump and collective errors
• Switches: Rotary switch for setting the manual mode or automatic mode
• Motor startup: Contactor for direct-on-line starting
• Motor protection: Switch for protection against short-circuits and overloads
• Individual signal report: Motor error message (short-circuit, overload)
• Error message and acknowledgement: The motor error message is indicated via corresponding LEDs. The error is acknowledged when the motor protection switch is restarted

Conforms to the following standards:

• Fixed firefighting systems - Automatic sprinkler systems (EN 12845), part for jockey pumps
• Electrical equipment of machines (EN 60204-1)
• Low-voltage switchgear and controlgear assemblies (EN 61439-1 and EN 61439-2)
• Electromagnetic compatibility (EMC) — Immunity for industrial environments (EN 61000-6-2)
• Electromagnetic compatibility (EMC) — Emission standard for residential, commercial and light-industrial environments (EN 61000-6-3)

Function description:

Wilo-Control SC-Fire J units can be used to control jockey pumps with an electric motor and sensors according to EN 12845, as well as for test purposes and operation of the sprinkler system.

The operating logic for the fire extinguishing system is based on the cascade calibration of the pressure switches for starting the pump.

The jockey pump, which is used for pressure boosting, is started first and ensures that the system is filled with water and that it remains pressurised. It is activated in the event of a pressure drop in the system. A properly calibrated pressure switch is used for controlled starting and stopping procedures.