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Dual fixed-speed vertical multistage pressure boosting system.

Compact pressure boosting system according to DIN 1988 and DIN EN 806, for direct or indirect connection. Consisting of non self-priming, switched in parallel, vertically-mounted stainless steel high-pressure centrifugal pumps in glanded versions. Ready for connection with stainless steel pipework, mounted on a base frame, including control device with all necessary measurement and adjustment equipment.
For fully automatic water supply and pressure boosting in residential, commercial and public buildings, hotels, hospitals, department stores and for industrial systems.
For pumping drinking water, process water, cooling water, fire water (apart from fire-extinguishing systems in accordance with DIN 14462 and with the approval of the local fire safety authorities) or other types of industrial water that do not attack the materials either chemically or mechanically and do not contain abrasive or long-fibre constituents.

Special features/product benefits
Heavy-duty system which satisfies all the requirements of DIN 1988 (EN 806)
WRAS/ KTW/ ACS approval of the pumps for all parts that come in contact with the fluid (EPDM version)
High-efficiency pump hydraulics of the Helix V series in conjunction with IE2 IEC standard motors, including 7.5 kW and larger IE3 standard motor (optional for smaller motor power)
Bidirectional mechanical seals in the pumps for easy maintenance
Flexible lantern design permits direct access to the mechanical seal
The spacer coupling enables the mechanical seal to be replaced without dismantling the motor (from 7.5 kW)
Hydraulics of entire system are pressure-loss optimised.
Parts that come in contact with the fluid are corrosion-resistant
Comfort control device SC-FC, maximum degree of control with symbol-based LC display, simple navigation with clear menu and red-button technology for parameter setting, including a frequency converter for infinitely variable control of the base-load pump
Factory inspection and default setting at optimum operating range (incl. acceptance test certificate based on EN10204 – 3.1)

Equipment/function
Stainless steel high-pressure centrifugal pumps of the Helix V series
Base frame of electrolytically galvanised steel, with height-adjustable vibration absorbers for insulation against structure-borne noise
Shut-off valve on the suction and pressure sides of each pump
Non-return valve on the pressure side of each pump
8 litre diaphragm pressure vessel, PN16 including throughflow fitting to DIN 4807, pressure side
Pressure sensor (4-20 mA), pressure side
Pressure gauge, pressure side
Automatic pump control by means of a fully electronic
Smart-Controller (SC-FC) in a sheet metal enclosure, protection class IP 54 consisting of internal control voltage supply unit, microprocessor with soft PLC, frequency converter, analogue and digital inputs and outputs.
A working area of 1 m around the system is recommended in order to facilitate the maintenance process.

Operation/ display
LC display (backlit) for display of the operating data, controller parameters, operating statuses of the pumps, error messages and history log
Menu navigation with symbols and menu numbers
LEDs for display of the system status (operation/fault)
Factory-preset parameters for easy commissioning/start-up
Configuration of operating parameters and acknowledgement of fault signals using red-button technology
Lockable main switch
Operation selectable with / without standby pump by customer service
Elapsed time indicator for each pump and for entire system
Switching cycle counter for each pump and for entire system
Fault log for the last 16 faults

Control
Fully automatic control for 1 to 4 uncontrolled pumps by means of setpoint/actual value comparison
Frequency converter with sine filter for infinitely variable control of the base-load pump
Setpoint changeover: 2nd setpoint can be activated by contact
External remote setpoint adjustment by 4…20 mA signal
Automatic, load-sensitive cut-in of 1 to n peak-load pump(s) depending on the pressure – constant, p-c control variable
Contactors for switching on the pumps. SD models include thermal triggering and a timer relay for the star-delta combination
2 parameter sets selectable, easy menu (setpoint & control mode) or expert menu (operation and control parameters)
Operating mode of the pumps freely selectable (manual, off, automatic)
Automatic, configurable pump cycling
Standard setting: Impulse – The base-load pump is cycled at each new demand, regardless of operating hours
Alternative: Pump cycling dependent on operating hours, cycling of the base-load pump after the specified operating hours
Automatic, configurable pump test run (pump kick)
Can be activated/deactivated
Time between two test runs is freely programmable
Disabling times can be programmed as desired
Speed can be adjusted as desired

Monitoring
Actual value of the system is output via a 0-10 Volt analogue signal for external measurement / display applications, 10 Volt depending on the sensor range value
4-20mA sensor signal (conductivity test of the sensor cable) for control variable actual value
Protection of the pump motors in the DOL version: via motor protection switch; in the SD version: Fuses in combination with thermal triggering
Automatic changeover to the standby pump in the event of a operating pump fault
Monitoring of maximum and minimum system values with adjustable time delays and limits
Zero-flow test for switching off the system when no water is being drawn off (adjustable parameters)
Pipe filling function for filling empty pipes (initial filling of the consumer network)
Protection against low water level via contact e.g. for float switch or pressure switch

Interfaces
Potential-free contacts for SBM/SSM collective operation and collective fault signals
Logical reversal can be applied to SBM and SSM
Contacts for external on/off, low water and 2nd setpoint
External on/off via contact for deactivation of the system’s automatic mode

Optional accessories (factory installation or retrofitting after technical checks)
Manual-0-Automatic switch Preselection of the operating mode of each pump and manual operation in the event of a controller fault “Manual” (emergency/test mode available at mains power, motor protection available), “O” (pump switched off – cannot be switched on using the controller) and “Auto” (pump enabled for automatic mode via the controller)
Evaluation relay for PTC motor protection
Individual operation and fault signal, low-water signal
Signal converter for 0/ 2-10V to 0/ 4-20mA
Soft starter for peak-load pumps
Connection to BMS systems in accordance with VDI 3814

Recommended accessories (to be ordered separately)
Optional WMS low-water cut-out switchgear kit;
Flexible connection lines or expansion joints
Break tank for system separation
Diaphragm pressure vessel
Threaded caps for systems with threaded joint tubing

Bus systems (optional)
BACnet, LON-Bus, Modbus RTU

Standards followed
Specifications for drinking water installations (TRWI) DIN 1988 (EN806)
Diaphragm pressure vessel/ diaphragm expansion tank DIN 4807
Electronic Equipment for Use in Power Installations (EN 50178)
Electrical Equipment of Machines (EN 60204-1)
Household and Similar Electrical Appliances – Safety (EN 60335-1)
Low-voltage switchgear combinations EN 60439-1/ 61439-1
EMC – Immunity for Industrial Environments (EN 61000-6-2)
EMC emitted interference for domestic, trade and commercial applications and small companies EN 61000-6-3 (up to 9.0 kW, above this EN 61000-6-4 emitted interference for industrial applications)