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High-efficiency air-to-water heat pump

  SG Ready

The new high-efficiency heat pumps for indoor installation feature a flexible air circuit and a simple hydraulic connection. The outside air is drawn in at the back of the device. No air ducts are required. Thanks to the EC 3D radial fan, the air outlet can be on the left, right or top of the casing (as needed). The hydraulic connection of the heat pump can be perfectly adjusted to the given conditions. For installation, the flow and return can lead into the casing from the left or the right, as required.

The benefits at a glance:

  • Variable air outlet to the left, right or top with the
  • option of relocating the hydraulic connections from the right to the left
  • Electronic expansion valve for high seasonal performance factors and low operating costs
  • Free-swinging compressor baseplate and slow-running EC radial fan for low noise emissions
  • WPM EconPlus heat pump manager with integrated thermal energy metering and flow switch for high operational safety
  • Compact dimensions for space-saving installation - installation with built-under buffer tank PSP 120E possible


Technical data

High-efficiency air-to-water heat pump
Order reference LI 12TU
Heat pump code1010
Casing colourWhite (similar to RAL 9003)
Max. flow temperature60 °C
Lower operating limit heat source (heating operation) / Upper operating limit heat source (heating operation)-20 to 35 °C
Heat output A-7/W35 / COP A-7/W35*7,1 kW / 3,1
Heat output A2/W35 / COP A2/W35*9,4 kW / 4,0
Heat output A7/W35 / COP A7/W35*11,5 kW / 4,8
Heat output A10/W35 / COP A10/W35*12,0 kW / 5,1
Nominal power consumption according to EN 14511 at A2/W352,35 kW
Nominal power consumption according to EN 14511 at A7/W352,4 kW
Sound power level50 dB (A)
Sound pressure level in 1 m43 dB (A)
Refrigerant / Amount of refrigerantR410A / 4,6 kg
Max. heating water flow rate / Pressure drop2,0 m³/h / 27300 Pa
Heat source flow (min.)4100 m³/h
Dimensions (W x H x D)**960 x 1560 x 780 mm
Weight270 kg
Rated voltage3/N/PE ~400 V, 50 Hz
Starting current19 A
Fuse protection***C 13 A
Type of defrostingReverse circulation
Connection heating1 ¼ 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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