WATER-COOLED LIQUID CHILLERS 30XW 254-1762
Features and advantages
Superior operating economy
Full load and part load energy efﬁciency that surpasses the industry average: - Eurovent energy efﬁciency class “A” - EER of up to 5.9 kW/kW (30XW-P) - ESEER of up to 6.8 kW/kW (30XW-P) - New twin-rotor screw compressor equipped with a high-efﬁciency motor and a variable capacity valve that permits exact matching of the cooling capacity to the load. - Flooded multi-pipe evaporator and condenser for increased heat exchange efﬁciency. - Electronic expansion device permitting operation at a lower condensing pressure and improved utilisation of the evaporator heat exchange surface. - Economizer system with electronic expansion device for increased cooling capacity (30XW-P).
Screw compressors - Industrial-type screw compressors with oversized bearings and motor cooled by suction gas. - All compressor components are easily accessible on site minimising down-time. - Protection increased by an electronic board. Refrigerant circuit - Two independent refrigerant circuits (from 1000 kW upwards); the second one automatically takes over, if the ﬁrst one develops a fault, maintaining partial cooling under all circumstances. Evaporator - Electronic paddle-free ﬂow switch. Auto-setting according to cooler size and ﬂuid type. Auto-adaptive control - Control algorithm prevents excessive compressor cycling (Carrier patent) - Automatic compressor unloading in case of abnormally high condensing pressure. Exceptional endurance tests - Partnerships with specialised laboratories and use of limit simulation tools (ﬁnite element calculation) for the design of critical components. - Transport simulation test in the laboratory on a vibrating table and then on an endurance circuit (based on a military standard).
Low operating sound levels
Compressors - Silencers on the discharge line. - Silencers on the economiser return line. - Acoustic insulation on the components that are most subjected to radiated noise.
Compact design - The 30XW units are designed to offer the most compact dimensions on the market. - With a width of approximately 1 m up to 1600 kW the units can pass through standard door openings and only require minimum ﬂoor space in the plant room. Simpliﬁed electrical connections - Main disconnect switch with high trip capacity - Transformer to supply the integrated control circuit (400/24 V) Simpliﬁed hydronic connections - Victaulic connections on the evaporator and condenser - Practical reference marks for entering and leaving water connections - Possibility to reverse the heat exchanger water inlet and outlet at the factory - Possibilty to modify the number of heat exchanger passes Fast commissioning - Systematic factory operation test before shipment - Quick-test function for step-by-step veriﬁcation of the instruments, expansion devices and compressors
Remote Management (Standard)
Units with Touch Pilot control can be easily accessed from the internet, using a PC with an Ethernet connection. This makes remote control quick and easy and offers signiﬁcant advantages for service operations. The 30XW also communicates with other building management systems via optional communication gateways. The 30XW is equipped with an RS485 serial port that offers multiple remote control, monitoring and diagnostic possibilities. Carrier offers a vast choice of control products, specially designed to control, manage and supervise the operation of an air conditioning system. Please consult your Carrier representative for more information. The following commands/visualisations are possible from remote connection: - Condenser pumps control: a digital input allows veriﬁcation of condenser water ﬂow (the ﬂow switch must be supplied by the installer) - Start/stop of the machine - Dual set-point management: through a dedicated contact is possible to activate a second set-point (example: unoccupied mode) - Demand limit setting: to limit the maximum chiller capacity to a predeﬁned value - Operation visu