FLA-2 TRVB 1007/PN10 TRVB

Pressure boosting system as a fully automatic double pump compact unit for fire fighting purposes, consisting of:

2 non self-priming, vertical, multistage, stainless steel high-pressure centrifugal pumps with electric motor. Shaft sealing by standard cartridge mechanical seal (Helix pump). Diaphragm pressure vessel (capacity 8 l), joint tubing on suction and pressure side for each pump: with non-return valve, shut-off valves on suction and pressure side (sealed against unauthorized actuation), pressure sensor and manometer for automatic system control. Comes as standard with pump protection by means of minimum volume discharge via bypass circuit without auxiliary energy and automatic ventilation valve.

CC Fire switchgear for fire extinguishing systems according to TRVB128 S.

Automatic control for 2 pumps based on cascade operation with automatic switching and peak-load activation. Per pump switching device consisting of:

Switchgear integrated in a sheet metal enclosure, painted in RAL 7035. With built-in motor protection only for signalling of faults. Switch for manual-automatic mode. In automatic mode of the pump via pressure sensors, with 1 to 3 target values and an external on/off limit switches. All pressure sensor and limit switch signals are monitored for wire break and short-circuit.

System with programmable time switch for daily test run and programmable follow-up time. Dry-running protection relay, e.g. for connection of low water float switches from the WILO FLA break tanks or level electrodes, etc.; low water status only for signalling of faults.

With display colour for operational readiness, malfunction (red), interference suppression (green) and memory space for the last 200 fault signals.

Buzzer in the event of an alarm.

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

Additional text for systems with max. discharge pressure > 10 bar:

The customer must take suitable measures to ensure that the flow pressure of 10 bar and the resting pressure of 12 bar are not exceeded at any fire hose reel.

Switchgear/control device for fire water supply systems

Wilo-Control CC-Fire

Hardware:

Central control unit in fully-electronic version and designed in accordance with TRVB 128S-2012. Protection class IP 54, with internal maintenance switches, operating and display devices in the door front.

Features and functions:

The construction of the control device is dependent on the performance of the pumps (direct starting). It consists of the following components:

• Maintenance switch per pump: Activation and deactivation of the individual pumps The maintenance switches are fitted internally in order to prevent unauthorized deactivation of the pumps. The maintenance switches are also used to supply power to the individual pumps.
• Manual/automatic switch per pump: Switch in the door front for selection of the operating mode of the individual pumps. In manual operation, the selected pump is activated permanently and independently of the control unit. In automatic operation, the selected pump is activated and deactivated by the control unit.
• Touch display: Display of operating data and operating status via changing colour of the background lighting. Menu selection and parameter input possible via touch sensitive surface.
• Programmable logic controller: Modular SPS consisting of central control unit, analog module and a power supply. The control unit is programmed at the factory and takes over all tasks, such as monitoring and control of pumps, for fully automatic operation.
• Motor protection: In accordance with TRVB 128S, the electronic motor protection has a signalling effect and does not lead to the deactivation of the pump.
• Mains monitoring: To increase operational reliability, mains power supplies are permanently monitored for phase sequence, phase failure, overvoltage, undervoltage, and asymmetry. In the event of a fault (e.g. phase failure), this is indicated in the display as in an error message and issued as a collective fault via a potential-free contact and as a single fault for the affected mains. Monitoring has no impact on the operation of the pumps. The error message must be acknowledged.
• Control power supply: To increase operational reliability, power supply of control voltage is switched between the pump mains networks when a mains network fails.
• Low-water level protection / leakage break tank Option to connect a float switch or level electrode evaluation to protect the connected pumps from dry running. In the event of a fault, this is indicated in the display as in an error message and issued as a collective fault via a potential-free contact and as a single fault. Monitoring has no impact on the operation of the pumps. The error message must be acknowledged.
• Overflow break tank: Option to connect a float switch for the monitoring of the maximum level of a break tank. In the event of a fault, an error message is shown on the display. Monitoring has no impact on the operation of the pumps. The error message must be acknowledged.
• Signals: 2 potential-free changer contacts for collective operation and collective fault signals, 1 potential-free change-over contact for individual, standby and fault messages for the pumps, network monitoring, and low-water protection.
• Sensor redundancy: Two pressure sensors record the system pressure and are evaluated by the system, monitored for wire breakage and checked for plausibility. In the event of a sensor fault, the other one is used and a fault is indicated as an error message. This is also done when plausibility is not provided. The error message must be acknowledged.
• External acknowledgement: Error messages can be acknowledged via an external normally open contact.
• Horn: A horn is also used to indicate an error in addition to the red backlight of the display. This function can be disabled in the menu.

Software:

• This is programmed at the factory for fully-automatic operation. Configurable parameters for setpoints, follow-up times of pumps, limit values, times for the pump test run.
• Running time monitoring: The maximum running time of the pumps can be monitored for an adjustable range between 6 and 48 hours. When the configured running time is exceeded, a fault is displayed as an error message on the display. Running time monitoring has no impact on the operation of the pumps. The error message must be acknowledged.
• Fault and acknowledgement: Any errors are indicated in the display as error messages with date and time stamps, and have no impact on the operation of the system. No pumps are deactivated due to an error. All displayed errors must be acknowledged in the display. Up to 200 error messages are stored and can be called in the display or via computer or field bus. Acknowledgement can also be performed externally via a contact.
• Pump duty cycling: The base-load pump is exchanged in the event of another requirement.
• Pump test run: Every 6 to 336 hours, an alternating test run of a connected pump is performed for 10-60 s to avoid prolonged standstill times and to increase operational readiness. The interval for the pump test run can be configured individually. The pumps test run is only performed if no pump is running during the configured interval.
• Sensor redundancy: Two pressure sensors record the system pressure and are evaluated and monitored by the system, and checked for plausibility. In the event of a sensor fault, the other one is used and a fault is indicated as an error message. This is also done when plausibility is not provided. The error message must be acknowledged.
• Monitoring of maximum and minimum pressure: The system pressure can be monitored for maximum and minimum pressure. When the system pressure exceeds or falls below one of the configured values, a fault is displayed as an error message on the display. The monitoring has no impact on the operation of the pumps. The error message must be acknowledged.
• Maintenance interval monitoring: A maintenance interval of between 0 and 24 months can be defined for the switch. When the configured time is passed, a fault is displayed as an error message on the display. Monitoring of the maintenance interval has no impact on the operation of the pumps. The error message must be acknowledged.

Conforms to the following standards:

• 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:

The pressure boosting system for fire fighting operation in accordance with TRVB 128 S (technical guidelines for preventative fire protection) is controlled and monitored completely automatically via the fire fighting switchgear with modular PLC as centralized control depending on the system pressure.

The redundant running pressure sensors detect the system pressure. If the configured set pressure of the system pressure is exceeded, a pump is activated. Depending on load requirements, further pumps are switched automatically. The system pressure, the set pressure and the operating status of the pump and the control system are shown in the display. The control and regulation can be applied to up to 4 pumps. Once the set pressure is reached or exceeded, the pumps switch off after the configured follow-up time. A forced start of the pumps can be activated by an external contact. Forced starts are activated regardless of the status of the system. The contact for the forced start is monitored for wire breakage.

A wire break or short-circuit in the transmitting line causes the pump to start.