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Wilo-SiBoost Smart MVISE | Wilo
Your advantages
Wilo-SiBoost Smart 2-4 MVISE

Your advantages

  • Optimum pump load adjustment due to pressure-variable (pv) control mode and parallel synchronous speed control for higher energy savings
  • Up to 20 dB[A] quieter operation than conventional systems with comparable hydraulic output
  • Maintenance-free pump design without mechanical seals
  • Disproportionately large frequency converter control range from 20 Hz to a maximum of 50 Hz
  • High reliability thanks to various protective fea¬tures including overload protection, dry-running protection and automatic deactivation
  • Easy setting and operation with the SCe switchgear thanks to LCD display and green adjustment button
  • Drinking water approvals for all components that come in contact with the fluid
  • Ready for integration into building automation with the SCe switchgear via standard Modbus RTU

Series description
Wilo-SiBooost Smart 2-4 MVISE


Low noise water-supply unit ready for connection with 2 to 4 vertically arranged, non-self-priming glandless stainless steel high-pressure multistage centrifugal pumps of MVISE series switched in parallel. Each pump is equipped with integrated water-cooled frequency inverter. The system features a Smart Controller SCe.


Fully automatic water supply and pressure boosting in inlet mode, either from the public water supply network or from a tank at least 0.5 meter above the pump, for domestic, commercial, industrial and municipal applications (e.g. residential, office, administration buildings, hotels, hospitals, trades, industry, water supply companies). Standby pump included in accordance with DIN 1988 and DIN EN 806.

Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fiber constituents like:

  • Drinking water
  • Cooling water
  • Process water
  • Firefighting water (apart from fire-fighting systems in accordance with DIN 14462 and with the approval of the local fire safety authorities).


2-4 pumps per system of the MVISE series with glandless motors speed controlled via integrated frequency inverters on each pump.

SCe control panel ensures automatic control of the complete booster set.

All is mounted on galvanized steel height adjustable base frame.

All components in contact with fluid are corrosion resistant.

On pressure side:

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

On suction side:

  • Shut-off valve
  • Pressure sensor 4..20mA
  • Pressure gauge



Technical data

  • Mains connections 3~400 ±10 %, 50 Hz
  • Max. fluid temperature +50 °C
  • Max. ambient temperature +40 °C
  • Operating pressure 16 bar
  • Inlet pressure 6 bar
  • Nominal connection diameters:
    • on discharge side R 2" - R 3"
    • on inlet side R 2" - R 3"
  • Speed range 1100 - 2750 rpm
  • Protection class IP 44
  • Fuse protection on mains side [AC 3] according to motor power and EVU regulations


MVISE 2-8 m3/h

  • Pump housing in 1.4301 [Aisi 304]
  • Hydraulics in 1.4301 [Aisi 304]
  • Gasket EPDM


Base frame: galvanized steel and provided with height-adjustable vibration absorbers for comprehensive insulation against structure-borne well as integrated lifting points and cables tray.

Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework is dimensioned according to the overall hydraulic performance of the pressure boosting system

Pumps: 2 to 4 pumps from the MVISE 2, 4, 8 series switched in parallel are used.

The water-cooled frequency inverters on the pump motors enable continuous auto control between 20 Hz and a maximum of 50 Hz for all pumps of these series. All pump parts in contact with fluid are made of stainless steel.

Valves: each pump is fitted on the suction and pressure side with a check valve with DVGW approval mark and a pressure-side DVGW-approved non-return valve.

Diaphragm pressure vessel: 8 l/PN 16 arranged on the discharge side with a diaphragm made of butyl rubber, with DVGW/KTW approval, completely safe in accordance with food safety laws; for testing and inspection purposes, with a ball valve with drain and throughflow fitting with DVGW/KTW approval in accordance with DIN 4807.

Pressure monitoring: 2 Pressure sensors: 4..20 mA, located on the pressure and suction sides.

Pressure indication: pressure gauge arranged on the suction and the discharge sides.

Control panel: Smart Controller SCe as standard with LCD display.

Other versions on request

Scope of delivery

  • Factory-mounted, ready-for-connection pressure-boosting system checked for functionality and impermeability
  • Installation and operating instructions


Other mains connections on request

Consulting guide

Inlet pressure

The maximum inlet pressure (see Technical data) is to be observed for the system configuration. The maximum permissible inlet pressure is calculated from the maximum operating pressure of the system minus the maximum pump delivery head at Q = 0

Pressure reducer

Fluctuating inlet pressure is compensated by the speed control integrated into each single pump as long as the pressure fluctuation is not greater than the difference between the setpoint pressure value and the zero-delivery head of the single pump at minimum speed (operation at 20 Hz or 25 Hz). If the pressure fluctuation is greater, a pressure reducing valve must be installed upstream of the system.

Volume flow

Up to 240 m3/h (66 l/s) system configuration in accordance with DIN 1988 (EN 806); with standby pump up to 320 m3/h (88 l/s) during operation of the standby pump as additional peak load generator

Residual-current devices

When installing residual-current-operated protection switches in conjunction with frequency converters, bear in mind that only universal-current-sensitive residual-current-operated protection switches in accordance with DIN/VDE 0664 are to be fitted.

Wilo-WMS low-water cut-out switchgear

The series Helix VE pump being used is already equipped with an integrated dry-running detection as safety equipment for the pump. The installation of a low-water cut-out switchgear is required if the pressure boosting systems are connected directly to a public mains power supply; this prevents the inlet pressure in the mains supply line from dropping to values below 1.0 bar. Please order directly when ordering the pressure boosting system. The WMS will then be installed in the pressure boosting system by Wilo, electrically wired and fully tested at the final functional test.


The overall system conforms with the requirements of

  • DIN 1988 Part 5
  • DIN 1988 Part 6* (**)

* The specifications in DIN 1988 (EN 806) and of the water-supply companies are to be observed. Regarding the electrical components, the system conforms with the requirements of

  • VDE 0100 Part 430/Part 540
  • VDE 0110 Part 1/Part 2
  • VDE 0660 Part 101/Part 107 and
  • DIN 40719/IEC 754

Always observe the specifications in DIN 1988 (EN 806) when using and operating the pressure boosting system.(**) That does not apply to fire extinguishing systems in accordance with DIN 14462. Please request these separately.


Installation and operating instructions

Wilo-Control SC-Booster (SC, SC-FC, SCe)

Article Number 2535460
Edition 1809
Number of pages 1795
Language ar, bg, cs, da, de, el, en, es, et, fi, fr, hr, hu, it, lt, lv, nl, no, pl, pt, ro, ru, sk, sl, sr, sv, tr, uk, zh
PDF (44 MB)


Article Number 4230106
Edition 2020-04
Number of pages 258
Language de, en, es, fr, nl, ru, tr, uk
PDF (15 MB)

Certification booklet

Wilo-SiBoost Smart ...

Article Number 2550649
Edition 1905
Number of pages 16
Language bg, cs, da, de, el, en, es, et, fi, fr, hr, hu, it, lt, lv, nl, no, pl, pt, ro, ru, sk, sl, sr, sv, tr, uk
PDF (6 MB)

Wilo-Control SC-Booster (SC, SC-FC, SCe)

Article Number 2550530
Edition 1811
Number of pages 8
Language bg, cs, da, de, el, en, es, et, fi, fr, hr, hu, it, lt, lv, nl, no, pl, pt, ro, ru, sk, sl, sr, sv, tr, uk
PDF (2 MB)



Number of pages 1
Language language neutral
PDF (483 KB)