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High efficiency water-to-water heat pump for indoor installation.

  SG Ready

Heat pump for heating purposes for indoor installation with integrated WPM Econ5Plus control. Variable connection options for the ground water and heating connections on the rear wall of the casing. Integrated solid-borne sound insulation for direct connection to the heating system. Sound-optimised through encapsulated compressor housing and free-swinging compressor baseplate. High coefficients of performance (COPs) thanks to electronic expansion valve, COP booster and compliance with the requirements of EN 14511 for larger volume flows on the heat consumption side. Integrated corrosion-proof and freeze-proof stainless steel coil evaporator. Sensor monitoring of the refrigeration circuit for a high degree of operational safety and integrated thermal energy metering (display of the calculated quantity of thermal energy for heating and domestic hot water preparation on the WPM Econ5Plus heat pump manager). If the evaporation temperatures are too low, e.g. due to an inadequate water flow, the heat pump switches off, which means that no flow rate switch is required. For well systems with an insecure water supply, a flow rate switch available as a special accessory can also be installed. The control panel is integrated in a design screen and can also be used as wired remote control using the wall mounting set (special accessories MS PGD). Universal design for low-temperature heating systems with flexible expansion options for:

  • Room temperature control via Smart RTC (special accessory)
  • Bivalent or bivalent-renewable operating mode
  • Distribution systems with unmixed and mixed heating circuits
  • Use of load-variable tariffs (SG Ready)
Integrated soft starter (from WI 14); integrated load contactor for well water pump; flow sensor, return sensor, external sensor (standard NTC-2) and dirt filter for ground water included in the scope of supply.


Technical data

High efficiency water-to-water heat pump for indoor installation.
Order reference WI 22TU
Heat pump code3007
Casing colourWhite (similar to RAL 9003)
Max. flow temperature62 °C
Lower operating limit heat source (heating operation) / Upper operating limit heat source (heating operation)7 to 25 °C
Heat output W10/W35 / COP W10/W3522,3 kW / 5,7
Heat output W10/W45 / COP W10/W4521,1 kW / 4,4
Nominal power consumption according to EN 14511 at W10/W353,91 kW
Sound power level47 dB (A)
Refrigerant / Amount of refrigerantR410A / 4 kg
Max. heating water flow rate / Pressure drop3,8 m³/h / 22900 Pa
Heat source flow (min.)4,0 m³/h
Dimensions (W x H x D)**650 x 845 x 665 mm
Weight179 kg
Rated voltage3/PE ~400 V, 50 Hz
Starting current28 A
Fuse protection***C 16 A
Connection heating1 ¼ inch
Heat source connection1 ½ inch

*Heat output and coefficient of performance (COP) according to EN 14511

**Please note that additional space is required for pipe connections, operation and maintenance.

***Die Absicherung ist als allpolige Trennvorrichtung auszuführen (gemeinsame Abschaltung aller Phasen)!

Documents and downloads

Data sheetProduct data sheet with system accessories» via e-mail
Instruction for useInstruction for use» via e-mail
Operating instructions for users for the heat pump managerOperating instructions for users for the heat pump manager» via e-mail
Operating instructions for installers for the heat pump managerOperating instructions for installers for the heat pump manager» via e-mail
Product informationProduct information» via e-mail
Equipment dataEquipment data» via e-mail
Declaration of conformityDeclaration of conformity» via e-mail
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