Air-to-water heat pumps LWM
( 3 products )
Why Solarbayer heat pumps are so much popular
The Solarbayer LWM heat pump operates environmentally friendly, clean and absolutely emission-free. Up to 80% of the main heating energy for this air/water heat pump is drawn from the ambient air. Only approx. 20% of the energy required for heating is electricity, f.e. from an own PV system or supplied from your energy provider.
The annual averaged ambient temperature measured in Germany is approx. 9°C, so the outside air can provide the majority of the required energy and therefore offers a security of supply for the owner. In addition, by using a PV system for example the owner has the option of ensuring a largely independent self-supply of almost the entire building's energy requirements.
65 °C hot water at low temperatures
At an outside temperature of up to -15 °C the LWM heat pump supplies hot water up to 60 °C, and at an outside temperature of approx. -25 °C it supplies up to 45 °C. At low outside temperatures in the plus range (from +5 °C), the LWM heat pump can generate a flow temperature of up to 65 °C and is therefore also suitable for existing buildings.
Environmentally friendly refrigerant R32
R32 is an environmentally friendly and energy-efficient refrigerant and offers a long-term perspective for the future. Compared to the refrigerant R410A, it has a better cooling capacity (around 20 % more) and develops 2/3 less global warming potential (GWP).
Operator with state-of-the-art technology
DC motors consume up to 70% less energy than conventional AC motors and are extremely quiet. They offer several speed levels as well as reverse rotation and react more quickly to STOP, START and speed changes.
The operating principle of an air-to-water heat pump
An air/water heat pump works on the same principle as a refrigerator. In the refrigerator, the extracted heat is released to the outside environment. The heat pump extracts the heat from the ambient air and converts a low temperature into a high temperature (temperature boost). This is achieved by continuously changing the aggregate state of the refrigerant in the heat pump circuit. The refrigerant is first evaporated and then compressed. Then in the condenser the heat is transferred to the heating water. A Solarbayer air/water heat pump can achieve a maximum flow temperature of up to 65 °C and is therefore perfectly suited for low-temperature heating systems in new buildings or in old buildings that have already been renovated.
An environmentally friendly and quick heating replacement
By using a heat pump, you make your contribution to preserve our nature
and you help to extend the time for which fossil energy sources f.e. oil and gas are still available.
To enhance the amount of renewable energies in the heating market,
heat pumps are often subsidized by the state government or, in some cases, also by local communities.
The heat pump, which is ideally connected to a low-temperature surface heating system (usually wall or underfloor heating),
enables maximum heating, operating and living comfort.
The low flow temperatures of these heating systems increase the efficiency of the heat pump, while the cozy warmth
provides a pleasant and consistent room temperature in the living spaces.
With a Solarbayer LWM air-to-water heat pump, you can benefit from many advantages
- Performance classes 8 / 12 / 16 kW
- Flexible outdoor installation and exceptionally quiet operation
- Heating operation down to -25 °C outside temperature
- Compact design with integrated hydraulic components
- Automatic switch between heating mode and domestic hot water preparation
- Integrated controller technology for a monovalent or monoenergetic operating mode
- Integrated high-efficiency pump
- Integrated electric heating element
- Integrated condensate tray heater
- High operational reliability
- Suitable for new builds and renovations
- Can also be optimally integrated with Solarbayer storage systems
- Simple connection to the existing heating system
- Cascade operation of up to 6 units possible
Technical specifications
Performance data in heating mode
| Type | LWM 8-1P | LWM 12-3P | LWM 16-3P | ||
| Performance data for conditions A+7/W35 | Heating output | kW | 8,40 | 12,10 | 15,90 |
| Power consumption | kW | 1,63 | 2,44 | 3,53 | |
| COP | 5,15 | 4,95 | 4,50 | ||
| Performance data for conditions A+2 / W35 (incl. Defrost) | Heating output | kW | 7,10 | 9,20 | 13,00 |
| Power consumption | kW | 1,73 | 2,36 | 3,77 | |
| COP | 4,10 | 3,90 | 3,45 | ||
| Performance data for conditions A-7 / W35 | Heating output | kW | 7,00 | 10,00 | 13,10 |
| Power consumption | kW | 2,19 | 3,33 | 4,85 | |
| COP | 3,20 | 3,00 | 2,70 | ||
Performance data in cooling mode
| Type | LWM 8-1P | LWM 12-3P | LWM 16-3P | ||
| Performance data for conditions A20 / W15 | Cooling output | kW | 7 | 11,81 | 13,14 |
| Power consumption | kW | 1,05 | 2,37 | 2,7 | |
| EER | 6,69 | 4,99 | 4,87 | ||
| Performance data for conditions A25 / W15 | Cooling output | kW | 7,84 | 13,39 | 14,76 |
| Power consumption | kW | 1,34 | 3,04 | 3,47 | |
| EER | 5,87 | 4,41 | 4,25 | ||
| Performance data for conditions: A30 / W15 | Cooling output | kW | 8,71 | 13,03 | 14,77 |
| Power consumption | kW | 1,65 | 3,27 | 3,93 | |
| EER | 5,28 | 3,99 | 3,74 | ||
Basic data
| Type | LWM 8-1P | LWM 12-3P | LWM 16-3P | |
| Height | mm | 945 | 945 | 945 |
| Width | mm | 1385 | 1385 | 1385 |
| Depth | mm | 526 | 526 | 526 |
| Weight | kg | 153 | 193 | 193 |
| Housing color | Ivory white | |||
| Housing material | painted galvanized sheet steel | |||
| Heating circuit connections | Ø | 2 x DN32 (G 1 1/4") | ||
| Air volume flow in heating mode | m³/h | 4030 | 4060 | 4650 |
| Compressor type | Fully hermetic inverter-controlled scroll compressor | |||
| Operating range Outdoor temperature Heating | °C | -25 … +35 | ||
| Application range outdoor temperature hot water | °C | -25 … +43 | ||
| Operating range water-side heating | °C | +12 … +65 | ||
| Operating range water-side hot water | °C | +12 … +65 | ||
| Minimum buffer tank capacity* | Liter | 50 (*) | ||
| Sound pressure level LP (at 1 m in front of the unit [in open field]) | dB(A) | 48,5 | 53,5 | 58,0 |
| Refrigerant type | R-32 | |||
(*) for drinking water storage tanks: Heat exchanger with at least 2.5m² exchanger surface required
Electrical data
| Type | LWM 8-1P | LWM 12-3P | LWM 16-3P | |
| Power supply | V/~/Hz | 220-240V~ 50Hz | 380-415V 3N~ 50Hz | 380-415V 3N~ 50Hz |
| Operating power max. heating | A | 16 | 10 | 12 |
| Recommended fuse | A | 25 | 16 | 16 |
Energy efficiency class
according to EU regulation no. 811/2013 (Heating, average climate conditions)
| Type | LWM 8-1P | LWM 12-3P | LWM 16-3P | |
| For low temperature application W35 | A+++ | A+++ | A+++ | |
| For medium temperature application W55 | A++ | A++ | A++ |
Solarbayer offers special storage tank series for heat pumps:
Storage technology for heat pumps
Dimensions and mounting distances
| A | B | C | D | E | F | G | H | I | J |
| 1385 mm | 482 mm | 526 mm | 760 mm | 270 mm | 60 mm | 221 mm | 945 mm | 182 mm | 81 mm |
Diagram of heat pump with buffer tank and DHW tank (heat pump DHW tank)
This hydraulic example is for information purposes only and does not replace specialist planning!
Further hydraulic examples
