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Wilo-Comfort-Vario COR MHIE.../MS | Wilo
Your advantages

Your advantages

  • Easy installation thanks to compact system with two or three multistage horizontal MHIE pumps with integrated air-cooled frequency converter
  • High operational reliability thanks to full motor protection with PTC thermistor sensor and automatic dry-running detection
  • Drinking water approval (ACS) for pumps with components made of stainless steel that come into contact with the fluid
  • High operational reliability thanks to master/slave function
Series description
Wilo-Comfort-Vario COR-2-3 MHIE 203-1602/MS


Pressure-boosting system with 2 to 3 non self-priming stainless steel high-pressure multistage centrifugal pumps switched in parallel with integrated frequency converter


  • Fully automatic water supply and pressure boosting in inlet mode, either from the public water supply network or from a tank, for domestic, commercial, industrial and municipal applications (e.g. residential, office, administration buildings, hotels, hospitals, trades, industry, water supply companies)
  • Pumping drinking water, process water, cooling water or other industrial water, which does not affect the materials used, neither chemically nor mechanically, and does not have any abrasive or long-fibre constituents


  • 2 – 3 MHIE pumps per system
  • Continuous control mode by use of pumps with integrated frequency converters
  • Components that come in contact with the fluid are corrosion-resistant
  • Galvanised base frame with height-adjustable vibration absorbers for insulation against structure-borne noise
  • Stop valve on every pump on the suction and pressure sides
  • Non-return valve, pressure side
  • Diaphragm pressure vessel 8 l, PN 10, on the pressure side
  • Pressure sensor, on the discharge side
  • Pressure gauge optional, on the suction side
  • Pressure gauge, discharge side
  • Low-water cut-out switchgear, optional
  • Switchgear with IP54 plastic housing



Technical data

  • Mains connection 3~400 V ±10%, 50 Hz; 3~380/440 V ±10 %, 60 Hz (other versions on request)
  • Max. fluid temperature 50 °C (70 °C optional)
  • Max. ambient temperature 40 °C
  • Operating pressure 10 bar
  • Inlet pressure 6 bar
  • Discharge-side nominal connection diameter R 2"/DN 100
  • Intake-side nominal connection diameter R 2"/DN 100
  • Speed range 1200 – 3770 rpm
  • Protection class IP54
  • Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
  • Approved fluids (other fluids on request). Approved fluids are normally waters which do not corrode the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.
  • Cooling water
  • Drinking and process water


Single pump:

  • Impellers, stage chambers and pump housing made of stainless steel 1.4301/1.4404
  • Shaft of stainless steel 1.4404
  • EPDM gasket (EP851)/FKM (Viton)
  • Mechanical seal made of tungsten carbide/carbon
  • Bearing of tungsten carbide
  • Pump support foot made of aluminium


  • Base frame: galvanised and with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
  • Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework dimensions must correspond to the overall hydraulic performance of the pressure-boosting system
  • Pumps: 2 to 3 pumps from the MHIE series 2.., 4.., 8.. and 16.. switched in parallel; the frequency converter adapted to the pump motor enables continuous auto control for all pumps in these series; all pump components coming into contact with liquids are made of 1.4301/1.4404 stainless steel
  • Valves: Each pump is equipped on the suction and pressure side with a shut-off valve with ACS approval mark or annular shut-off valves and a pressure-side non-return valve with ACS approval
  • Diaphragm pressure vessel: 8 l/PN 10 on the discharge side with butyl rubber diaphragm, completely safe according to the food safety regulations; for test and inspections purposes, having ball valve and drain and throughflow fitting according to DIN 4807
  • Pressure sensor: 4 to 20 mA, on the discharge side

Scope of delivery

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

Installation and operating instructions


Article Number 4231106
Edition 2019-03
Page format 209.9 x 297.0 mm
Number of pages 44
PDF (3 MB)

General overview

General Overview 2023 - International version

Edition 2022
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (24 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (262 KB)