Listen to the silence... Appreciate the performance !

BWT, a leading French manufacturer of pool and spa equipment, partnered with Mitsubishi Electric, a world leader in the field of air-conditioning to pool their skills and develop a new range of heat pumps for swimming pools that Mitsubishi’s Power Inverter and Zubadan technologies to offer excellent performance levels, both in terms of noise levels and improved performance coefficients.

Energetic performance

BWT M.P.I. heat pumps compensate for extremely low outdoor air temperatures by injecting hot gas from an additional bottle directly at the compressor. The Flash Injection circuit injects refrigerant to maintain the refrigerant circulation volume and compressor operation load, thereby maintaining the heating capacity. The Flash Injection ensures that the compressor has enough refrigerant fluid to prevent overheating which would automatically cause the compressor to slow in order to protect itself.

Reversible heat pumps

All BWT M.P.I. heat pumps are reversible as standard. A BWT M.P.I. heat pump can be used to heat or cool pool water. This feature is particularly appreciated in very hot regions where it can be used to hold swimming pool water at a comfortable temperature or even to lower or maintain the water temperature in aquaculture tanks used to rear and store fish.

Low noise levels

Conventional On/Off heat pumps generate a constant sound power, even when water temperature is around the set point. On the other hand, BWT Power Inverter heat pump compressors slow significantly around the set point so that they run much more quietly than a conventional On/Off machine. This is particularly important when the heat pump must be installed close to neighbouring properties.

The Power Inverter system

On the contrary to conventional On/Off heat pumps that run at a constant speed (50 Hz), the Inverter heat pump compressor can run at between 11 and 100 Hz to adapt to the machine’s operating conditions and the outdoor temperature.In fact, while the outside temperature is low, or while the heating demand is high, the compressor will run at high speed (between 50Hz and 100Hz). 

Inversely, while the heating demand is low, notably around the set point, the Inverter compressor will run at low speeds (between 11Hz and 50Hz). Running at low speeds, inverter compressors are almost noiseless, the COP is 30 to 40% better, and their service life is extended.

Product Advantages Quick View

• Improved heating power and COP (coefficient of performance).
• Reversible machine, can be used to heat or cool the pool water, compatible with a 60 Hz utility frequency.
• The pool water temperature, set point and operating mode (heat/ cool) are displayed on the remote control.
• Automatic defrosting by cycle inversion, allows the machine to operate at outside temperatures down to -15°C.
• Complies with EC standards.
• Low acoustic power in low speed mode thanks to the Mitsubishi Scroll Inverter compressor.
• Titanium, helical plate heat exchangers (BWT exclusive), compatible with salt electrolysis.
• Wired-in remote control (option).
• Low water level safety device (Flow switch).
• Wired in via a watertight deck box.
• Anti UV treated ABS casing allowing integration of a regulator, deck box, heat exchanger, flow controller, probes and communication and control circuit boards.
• Hydraulic connections, Ø 50 mm, solvent.
• ICHILL thermostat, Comfort and Eco mode.
• Condensate drainage and recovery kits.