The electronic expansion device (EXV) allows operation at a lower condensing pressure (EER, COP and ESEER optimisation). - Dynamic superheat management for better utilisation of the water heat exchanger surface. - Defrost cycle optimisation (30RQSY) Reduced maintenance costs - Maintenance-free scroll compressors - Fast diagnosis of possible incidents and their history via the Touch Pilot Junior control - R410A refrigerant is easier to use than other refrigerant blends
Non-ozone depleting R410A refrigerant - Chlorine-free refrigerant of the HFC group with zero ozone depletion potential - Very efﬁcient - gives an increased energy efﬁciency ratio (EER, COP and ESEER) Leak-tight refrigerant circuit - Brazed refrigerant connections for increased leaktightness - Reduction of leaks due to reduced vibration levels and elimination of capillary tubes (TXVs) - Veriﬁcation of pressure transducers and temperature sensors without transferring refrigerant charge
Single or dual water pump (as required) with operating time balancing and automatic changeover to the backup pump if a fault develops - Water ﬁlter protects the water pump against circulating debris - Pressure measurement, using two pressure transducers and allowing indication of water ﬂow rate, water pressure and lack of water. - High-capacity membrane expansion tank ensures pressurisation of the water circuit - Overpressure valve, set to 4 bar - Speed variator on the pumps (option) to ensure the correct ﬂow rate, based on the system requirements - Thermal insulation and frost protection down to -20°C, using an electric resistance heater (see table of options) Simplified electrical connections - A single power supply point without neutral - Main disconnect switch (option 70) with high trip capacity - Transformer for safe 24 V control circuit supply included Fast commissioning - Systematic factory operation test before shipment - Quick-test function for step-by-step veriﬁcation of the instruments, electrical components and motors
Supply air connection frame
Variable-speed pump (option) - The control algorithm adjusts the water ﬂow rate in accordance with the actual system requirements. This saves energy and makes the ﬂow control valve unnecessary. Variable-speed fan - Variable-speed ventilation permits adjustment to any duct type and variation of the air ﬂow rate for maximised unit EERs and COPs under any operating conditions. Increased energy efficiency at part load - Eurovent energy efﬁciency class A and B in cooling mode and A in heating mode (in accordance with EN14511-3:2013) - The refrigerant circuit includes several compressors connected in parallel. At part load, around 99% of the operating time, only the compressors that are absolutely necessary operate. At these conditions the compressors operating are more energy efﬁcient, as they use the total condenser and evaporator capacity. 486
State-of-the-art concept - Cooperation with specialist laboratories and use of limit simulation tools (ﬁnite element calculations) for the design of the critical components, e.g. motor supports, suction/discharge piping etc. Auto-adaptive control - Control algorithm prevents excessive compressor cycling and permits reduction of the water quantity in the hydronic circuit (Carrier patent) - Hydronic module with integrated pressure transducers allowing measurement of the water pressure at two points, as well as measurement of the water ﬂow rate and detection of lack of water and pressure. This considerably reduces the risk of problems such as frost accumulation on the water heat exchanger. - Automatic compressor unloading in case of abnormally high condensing pressure. If an anomaly occurs (e.g. fouled air heat exchanger coil, fan failure) AquaSnap continues to operate, but at reduced capacity.