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LI 11MER

Reversible air-to-water heat pump

Heat pump for heating and cooling for indoor installation with integrated WPM 2007 R controller. The control panel is integrated into a brown-red design screen and can also be used as wired remote control using the wall mounting set (special accessories MS PGD). The integrated air flow enables corner or wall installation with air ducts at the air intake and the air outlet side. Sound-optimised through low-noise axial-flow fan and vibration-isolated compressor. High coefficients of performance using an evaporator optimised for heating operation and energy-efficient defrosting by reverse circulation. Universal design with optional DHW preparation and the option of flexible expansion for:

  • bivalent operation (bivalent-renewable not possible)
  • combined distribution systems for heating and cooling
  • unmixed and mixed heating and cooling circuits
Silent cooling via panel heating/cooling systems requires the use of the room climate control station (special accessory) to regulate the flow temperature on the basis of the air temperature and humidity of a reference room. Integrated soft starter, flow and return-flow sensors; external sensor (standard NTC-2) included in the scope of supply.

Information on leak tests and refrigerant quantities can be found here.

Technical data

Reversible air-to-water heat pump (Low temperature)
Order reference LI 11MER
Casing colourwhite
max. flow temperature58 °C
Lower operating limit heat source (heating operation) / Upper operating limit heat source (heating operation)-25 to 35 °C
Lower operating limit heat source (cooling operation) / Upper operating limit heat source (cooling operation)15 to 40 °C
Standard temperature spread heating EN 145115,0 K
Heat output with 1 compressor / COP A-7/W35*7 kW / 2,7
Heat output 1 compressor at A2/W35 / COP A2/W35*8,8 kW / 3,3
Heat output with 1 compressor / COP A7/W35*11,1 kW / 4
Heat output with 1 compressor / COP A10/W35*12 kW / 4,4
Standard temperature spread cooling EN 145115,0 K
Cooling capacity 1 compressor / EER A35/W7*7,5 kW / 2,1
Cooling capacity 1 compressor / EER A27/W18*10,8 kW / 3,2
Nominal consumption according to EN 14511 at A2/W352,61 kW
Sound power level device55 dB (A)
Sound pressure level in 1 m (indoors)50 dB (A)
Refrigerant / Amount of refrigerantR404A / 3,6 kg
Heat source flow min.2500 m³/h
Maximum heating water flow rate / Pressure drop1,9 m³/h / 10900 Pa
Dimensions (W x H x D)**750 x 1360 x 880 mm
Weight205 kg
Connection voltage1/N/PE ~230 V, 50 Hz
Starting current with soft starter38 A
Fuse protectionC 25 A
Type of defrostingReverse circulation
Connection heating1 ¼ inch

*Heat output and COP according to EN 14511 at A2/W35 (A2 = air intake temperature +2 °C, W35 = heating water outlet temperature +35 °C)

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

Product data sheet with system accessories: Data sheet as PDF Data sheet by e-mail

Installation and operating instruction: Installation and operating instruction as PDF

Operating limits diagram: Operating limits diagram as PDF

Declaration of conformity: Declaration of conformity as PDF

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