SiBoost Smart 2 Helix EXCEL 208 | Wilo
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SiBoost Smart 2 Helix EXCEL 208

Technical data
Tender text

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 multistage centrifugal pumps in glanded versions, for which each pump is fitted with a frequency converter. 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, industrial systems as well as municipal applications (e.g. water supply companies).

For pumping drinking water, process water, cooling water, firefighting water (apart from fire-extinguishing systems in accordance with DIN 14462 and with the approval of the local fire protection 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 advantages

  • Heavy-duty system that fulfils all the requirements of DIN 1988 (EN 806)
  • Valves and sensors are protected for safe and reliable installation
  • Optimum pump load adjustment due to pressure-variable (pv) control mode and parallel synchronous speed control for higher energy savings
  • WRAS/KTW/ACS approval of the pumps for all parts that come into contact with the fluid (EPDM version)
  • Helix EXCEL series high-efficiency pump hydraulics, electronically controlled by EC motors with air-cooled integral frequency converters
  • Highly efficient EC motor with high-efficiency drive (energy efficiency class IE5, limit value according to IEC 60034-30-2)
  • Energy-saving thanks to superproportionally large frequency converter control range of 25 Hz up to a maximum of 60 Hz
  • Integrated dry-running detection with automatic cut-out in event of low water via performance characteristics of the motor control electronics
  • Bidirectional mechanical seals in the pumps for easy maintenance
  • The flexible lantern design enables 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.
  • Intermediate bearings of ceramic (Al203/CW) ensure a long service life
  • Parts that come in contact with the fluid are corrosion-resistant
  • SCe comfort control device, maximum degree of control performance with symbol-based LCD display, simple navigation with clear menu and Green Button Technology for setting parameters for controlling the electronic pumps with frequency converters
  • Ready for integration into building automation with the SCe switchgear via standard Modbus RTU
  • Factory inspection and default setting at optimum operating range (incl. inspection certificate in accordance with EN 10204 – 3.1)


  • Stainless steel high-pressure multistage centrifugal pumps of Helix EXCEL 2 to Helix EXCEL 52 series
  • Base frame of electrolytically galvanised steel, with height-adjustable vibration absorbers for insulation against structure-borne noise

On the pressure side:

  • Shut-off valve at each pump
  • Non-return valve at each pump
  • Diaphragm pressure vessel 8 l, PN 16
  • Pressure sensor 4 ... 20 mA
  • Pressure gauge

On the suction side:

  • Shut-off valve at each pump
  • Pressure sensor 4 ... 20 mA
  • Pressure gauge
  • Automatic pump control by means of a fully electronic

Smart-Controller (SCe) in a sheet metal enclosure, protection class IP54, consisting of an internal control voltage supply unit, microprocessor with Soft PLC, analogue and digital inputs and outputs, for control of electronic pumps with frequency converters.

A working area of 1 m around the system is recommended in order to facilitate the maintenance process.


  • 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
  • Setting of operating parameters and acknowledgement of fault messages using Green Button Technology
  • Lockable main switch
  • Operation with/without standby pump selectable by customer service
  • Elapsed time indicator for each pump and for entire system
  • Switching cycle counter for each pump and for entire system
  • Fault memory for the last 16 faults


  • Fully automatic control for 1 – 4 frequency-controlled pumps by means of setpoint/actual value comparison
  • Setpoint changeover: Second 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 control variable “pressure constant” (p-c) or “pressure variable” (p-v)
  • 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
    • Alternatively: 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


  • 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 – 20 mA sensor signal (conductivity test of the sensor cable) for control variable actual value
  • The pump mains power feed is protected via the circuit breaker
  • Automatic switchover to standby pump in the event of an 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
  • Automatic shutdown of pumps if fault occurs or operation at preset emergency operation speed


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

Optional accessories (factory installation or retrofitting after technical checks)

  • Individual operation and fault signal, low-water signal
  • Signal converter for 0/2 – 10 V to 0/4 – 20 mA

Recommended accessories (to be ordered separately)

  • Flexible connection pipes or compensators
  • Diaphragm pressure vessel
  • Threaded caps for systems with threaded manifold

Bus systems (optional)

  • LON bus, Modbus TCP, BACnet MSTP, BACnet IP

Standards followed

  • Specifications for drinking water installations (TRWI) DIN 1988 (EN 806)
  • Diaphragm pressure vessel/diaphragm expansion tank DIN 4807
  • Electronic equipment for use in power installations, EN 50178
  • Electrical equipment of machines EN 60204-1
  • Safety of household and similar electrical appliances EN 60335-1
  • Low-voltage switchgear and controlgear assemblies EN 60439-1/61439-1
  • EMC – Interference immunity for industrial environments EN 61000-6-2
  • EMC – Interference emission for residential, commercial and light-industrial environments (EN 61000-6-3)
Operating data
Number of pumps 2
Fluid temperature T 3 °C
Ambient temperature T 5 °C
Maximum operating pressure PN 16 bar
Maximum inlet pressure p inl 10 bar
Motor data
Mains connection 3~380 V, 50/60 Hz
Rated power P2 1.1 kW
Rated current IN 1.88 A
Rated speed n 3500 1/min
Insulation class F
Protection class motor IP55
Protection class switchgear IP54
Pump housing Stainless steel
Impeller Stainless steel
Shaft Stainless steel
Shaft seal Q1BE3GG
Gasket material EPDM
Pipework material Stainless steel
Installation dimensions
Pipe connection on the suction side DNs R 1½
Pipe connection on the discharge side DNd R 1½
Ordering information
Brand Wilo
Product description SiBoost Smart 2 Helix EXCEL 208
Net weight, approx. m 173 kg
Article number 2542651

Installation and operating instructions

Wilo-SiBoost Smart (FC) ... Helix V/... Helix VE/... Helix EXCEL

Article Number 2535457
Edition 2021-01
Page format 209.9 x 297.0 mm
Number of pages 48
PDF (3 MB)

Certificate REACH (Documents)

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)