REVERSIBLE AIR-TO-WATER HEAT PUMPS
DC inverter twin-rotary compressor
Advanced technology providing maximum energy-efficiency with high capacity available at peak conditions and optimised efficiency at low and mid compressor speeds. The AquaSnap PLUS heat pump DC inverter uses Intelligent Power Drive Unit (IPDU) hybrid inverter technology, combining two electronic management logics: Pulse Amplitude Modulation (PAM) and Pulse Width Modulation (PWM) for optimised compressor operation in all conditions, minimised temperature fluctuations, and providing perfect individual comfort control with significantly reduced energy consumption: - PAM: pulse amplitude modulation of the direct current controls the compressor at maximum load conditions (start-up and peak load), increasing the voltage at ﬁxed frequency. The compressor works at high speed to rapidly achieve the desired temperature. - PWM: pulse width modulation of the direct current controls the compressor at partial load conditions, adjusting the frequency at ﬁxed voltage. The compressor speed is ﬁne-tuned and the system provides high-level comfort (no temperature ﬂuctuations) at exceptionally efﬁcient working conditions.
Compressor frequency is increased continuously up to the maximum level. This ensures that there are no current draw peaks in the start-up phase and safe connection to a single-phase power supply even in large-capacity systems. The maximum operating current of AquaSnap PLUS systems is below 7.2 A (systems up to 4 kW) and below 23 A for larger systems (12 kW). Inverter rampup speed makes soft starts unnecessary and ensures immediate maximum power. The two rotary compression cylinders, offset from each other by 180°, and the DC brushless motor with the shaft in perfect balance ensure reduced vibration and noise, even at very low operating speeds. This results in an extremely wide range between minimum and maximum capacity with con- tinuous operation, guaranteeing that the system is always optimised and provides maximum comfort at exceptionally high efficiency levels. Twin-rotary cylinders, low vibrations and low load to the shaft ensure highest compressor reliability and a long trouble-free operating life. All DC brushless twin-rotary compressors are equipped with crankcase heaters as standard. A double compressor shield for acoustic insulation further reduces noise levels.
Increased energy efficiency at part load - The exceptionally high energy efﬁciency of the AquaSnap PLUS heat pumps is the result of a long qualiﬁcation and optimisation process. - Use of ambient air as primary source of energy in domestic heating applications signiﬁcantly reduces the overall energy consumption and minimises CO2 emissions. - Night mode operation at reduced compressor speed, resulting in low-noise operation and a signiﬁcant reduction in energy consumption. - Easy-to-set and economical silent mode, reducing the compressor speed. - R410A refrigerant is easier to use than other refrigerant blends.
Exceptional endurance tests - Third-party testing and certiﬁcation - all performances are certiﬁed by Eurovent and unit safety is certiﬁed by IMQ. - All units are tested at various stages on the production line for circuit leakage, electrical compliance, water and refrigerant pressures. - End-of-line test of all unit operating parameters. - Corrosion resistance test. - Accelerated ageing test on critical components and complete assembled units, simulating thousands of hours of continuous operation - Packaging crash test to ensure that the units are adequately protected against accidental shocks. - Extensive ﬁeld and site testing.