Wilo-Comfort-Vario COR MHIE.../VR

Series description

Special features/product advantages

  • Compact system with outstanding price/performance ratio due to MHIE series stainless steel high-pressure multistage centrifugal pumps with integrated air-cooled frequency converters
  • Superproportionally large control range
  • Integrated full motor protection with thermistor sensor (PTC)
  • Integrated dry-running detection with automatic deactivation in the event of low water via the motor control electronics

Design type

Pressure boosting system with 2 to 4 parallel-switched, non-self-priming stainless steel high-pressure multistage centrifugal pumps with speed-controlled motors


  • Fully automatic water supply and pressure boosting in residential, commercial and public buildings, hotels, hospitals, department stores and for industrial systems.
  • Pumping of drinking water and 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.


  • 2-4 pumps per system
  • Infinitely variable control mode through the use of pumps with integrated frequency converters
  • Components that come in contact with fluid are corrosion-resistant
  • Galvanized base frame with height-adjustable vibration damper for insulation against structure-borne noise
  • Shut-off valve at each pump, on the suction and pressure sides
  • Non-return valve, pressure side
  • Diaphragm pressure vessel 8 l, PN16, pressure side
  • Pressure sensor, on the discharge side
  • Optional pressure gauge, suction side
  • Pressure gauge, discharge side
  • Optional low-water cut-out switchgear

Scope of delivery

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

Type key


Wilo-COR-3 MHIE 406/VR


Compact pressure boosting system with integrated speed control


Number of pumps


Pump series


Rated volume flow [m3/h] of the single pump


Number of single-pump stages


Control unit; VR = Vario controller

Technical data

  • 3~400 V ± 10 %, 50 Hz; 3~380/440 V ±10 %, 60 Hz mains connection, depending on type also 1~230 V, 50/60 Hz (other versions on request)
  • Max. fluid temperature 50 °C (70 °C optional)
  • Ambient temperature max. 40 °C
  • Operating pressure 16 bar
  • Inlet pressure 10 bar
  • Nominal connection diameters on discharge side R 2” - DN 250
  • Nominal connection diameters on inlet side R 2" - DN 250
  • Speed range 1200- 3770 rpm
  • Protection class IP 54
  • Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
  • Approved fluids (other fluids on request):Note on fluids: Approved fluids are generally water mixtures which do not chemically or mechanically attack the materials used and do not contain either abrasive or fibrous matter
    • Cooling water
    • Potable and process water
    • Fire water (wet line; for dry lines on request - comply with separate specifications of DIN 1988 (EN 806) and of fire-protection authorities.)


  • Impellers 1.4301/1.4404 stainless steel
  • Stage chambers 1.4301/1.4404 stainless steel
  • Pump housing made of 1.4301/1.4404 stainless steel
  • Shaft 1.4404 stainless steel
  • Gaskets EPDM (EP851)/FKM (Viton)
  • Housing cover made of 1.4301/1.4404 stainless steel
  • Housing bottom 1.4404 stainless steel
  • Mechanical seal made of tungsten carbide/carbon
  • Pressure shroud 1.4301/1.4404 stainless steel
  • Bearing, tungsten carbide
  • Pump base aluminium


  • Base frame: galvanised and provided 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 is dimensioned according to the overall hydraulic performance of the pressure boosting system
  • Pumps: 2 to 4 pumps from the MHIE 2.., 4.., 8.. and 16.. series switched in parallel are used; adapted frequency converters on the pump motor enable continuous auto control for all pumps of these series; all pump components in contact with fluid are made of stainless steel
  • Valves: each pump is fitted on the suction and pressure side with a shut-off valve with DVGW approval mark or annular shut-off valves and a pressure-side DVGW-approved non-return valve
  • Diaphragm pressure vessel: 8 l/PN 16 located on the discharge side with a butyl rubber diaphragm, completely safe in accordance with food safety laws; for testing and inspection purposes, with ball valve, with drain and throughflow fitting according to DIN 4807
  • Pressure sensor: 4 to 20 mA, located on the discharge side for activating the central Comfort-Vario controller
  • Pressure display: suction- and discharge-side pressure gauge (ø 63 mm); additional digital display of discharge pressure in the alphanumeric LCD display of the Comfort-Vario controller
  • Controller: the system is standard-equipped with a VR Vario controller

Duty chart

Comfort-Vario COR


REACH Regulation

Edition 2018-10
Page format 209.9 x 296.7 mm
Number of pages 4

PDF (581 kB)


General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 64

PDF (11 MB)


Wilo-Economy, Wilo-Comfort, -Comfort-N, Wilo-Vario

Article Number 2063145
Edition 1010
Version number 04
Page format 209.9 x 297.0 mm
Number of pages 83

PDF (1 MB)



Article Number 2040503
Edition 1108
Version number 02
Page format A4
Number of pages 26

PDF (341 kB)


Wilo-Economy MHIE

Edition 0506
Version number 02
Page format A4
Number of pages 34

PDF (3 MB)


Wilo-Economy MHIE

Article Number 4090996
Edition 1609
Version number 04
Page format A4
Number of pages 21

PDF (1 MB)



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