AHI Carrier Catalog | Page 139

AIR-COOLED SCROLL CHILLERS WITH GREENSPEED INTELLIGENCE 30RBM/30RBP 160-520 ® Features and advantages Fast and easy installation ■■ Compact design -- The AquaSnap units are designed to offer compact dimensions for easy installation. -- With a length of approximately 4.8 m for 520 kW and a width of 2.25 m the units require minimum floor space. HEATING HEATING ■■ Condenser section with fixed speed fans (30RBM models): -- Optional low-speed fans (700 rpm) and compressor enclosure to reduce full load noise level by 6 to 7dB(A) -- Condenser coils in V-shape with an open angle, allowing quieter air flow across the coil -- Low-noise 4th generation Flying Bird fans, made of a composite material (Carrier patent) -- Rigid fan installation for reduced noise (Carrier patent). ■■ Condenser section with Greenspeed® variable-speed fans (30RBP models recommended by Carrier for even quieter operation): -- Optional factory setting of the fan in low speed together with compressors enclosure to reduce full load noise level by 6 to 7 dB(A) -- Exceptional acoustic signature during part-load operation through smooth fan speed variation. ■■ Specific control functions or features to reduce noise level during night or unoccupied periods: -- Night time sound control with cooling capacity and fan speed limitation -- Low-noise scroll compressors with low vibration level -- The compressor assembly is installed on an independent chassis and supported by flexible antivibration mountings. -- Dynamic suction and discharge piping support, minimising vibration transmission (Carrier patent) -- Acoustic compressor enclosure, reducing radiated noise emissions (option). COOLING Low sound level CONTROLS ■■ High unit full and part load energy efficiency and efficient design of the water side: -- Eurovent energy efficiency class A or B -- Standardised Eurovent values in accordance with EN 14511-3:2013 EER up to 3.1 and ESEER up to 4.35 (30RBP version) -- Multiple scroll compressors equipped with a highefficiency motor that permit exact matching of the cooling capacity to the load -- Electronic expansion device permitting operation at a lower condensing pressure and improved utilisation of the evaporator heat exchange surface (superheat control) -- Condenser with high-efficiency Novation® aluminum micro channel heat exchangers and Greenspeed® variable speed fans (30RBP version) -- Low pressure drop brazed plate heat exchangers (pressure drops < 45 kPa at Eurovent conditions). ■■ Specific control functions to reduce unit cooling energy use during occupied and unoccupied periods: -- Internal time schedules clock: Permits chiller on/off control and operation at a second set point -- Automatic water set-point offset based on outside air temperature or room air temperature via an option -- Floating high-pressure management -- Variable-speed fan control -- Cooling demand limitation. ■■ Greenspeed® variable-speed pump to reduce pumping energy use up to 2/3 (option recommended by Carrier): -- Elimination of the energy losses caused by the water flow control valve by the electronic setting of the nominal water flow -- Energy savings during stand-by periods or part-load operation by automatic water pump speed reduction. Pump motor energy use varies as the cube of the speed so that only 40% speed reduction can reduce energy consumption by 80% -- Improved unit part-load performance (SEER increased SEER value with variable water flow following EN14825). Refer to hydronic option chapter for more information. ■■ Extra energy savings through multiple options: -- Glycol free direct-expansion free cooling (Carrier patent) on one or two refrigerant circuits or hydronic free cooling (available in 2015) -- Partial or total heat reclaim. ■■ Reduced maintenance costs -- Fast diagnosis of possible incidents and their history via the control -- R-410A refrigerant is easier to use than other refrigerant blends. AIR TREATMENT Very economical operation C A R R I E R 2 0 1 6 / 2 0 1 7 139