AHI Carrier Catalog | Page 101

AIR-COOLED LIQUID CHILLERS 30RBS 039-160 ■■ Integrated hydronic module (option) -- Centrifugal low or high-pressure water pump (as required), based on the pressure loss of the hydronic installation Hydronic module -- Single or dual water pump (as required) with operating time balancing and automatic changeover to the back-up pump if a fault develops -- Water filter protects the 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 -2 0°C, using an electric resistance heater (see table of options) C A R R I E R 2 0 1 6 / 2 0 1 7 -- Optional variable-speed pump for economical operation -- The control algorithm adjusts the water flow rate based on the actual system requirements and obsoletes the need for the control valve at the unit outlet. ■■ Increased energy efficiency at part load -- Eurovent energy efficiency class (in accordance with EN14511-3:2013) C and D in cooling mode and B and C in heating mode. -- 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. -- 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. ■■ 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. Environmentally balanced ■■ 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) -- 50% reduction in the refrigerant charge through the use of micro-channel heat exchangers for the cooling only units (30RBS) ■■ 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. 101 HEATING HEATING Easy and fast installation Economical operation AIR TREATMENT ■■ Compressors -- Low-noise scroll compressors with low vibration level -- The compressor assembly is installed on an independent chassis and supported by anti-vibration mountings -- Dynamic suction and discharge piping support, minimising vibration transmission (Carrier patent). ■■ Condenser (30RB)/air section -- Vertical condenser coils -- Protection grilles on anti-vibration mountings to protect the heat exchanger against possible shocks (optional on 30RB 039-160). -- Low-noise latest-generation Flying Bird IV fans, made of a composite material (Carrier patent) are now even quieter and do not generate intrusive low-frequency noise -- Rigid fan installation for reduced start-up noise (Carrier patent). ■■ Physical features -- The unit has a small footprint and a low height (1330 mm) allowing it to blend in with any architectural styles. -- The unit is enclosed by easily removable panels, covering all components (except air heat exchangers and fans). ■■ 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. CONTROLS Quiet operation COOLING Features and advantages