Features and advantages
Low energy consumption
The 30XWHV was designed for high performance both at full load and at part load. Exceptional ESEER values set new benchmarks for low energy consumption. - Eurovent energy class A - Eurovent certified values per EN14511-3:2011 High energy efficiency - Inverter-driven twin-rotor screw compressors allow precise capacity matching of building load changes and signiﬁ-cantly reduce unit power input, especially at part-load. - Flooded multi-pipe heat exchangers for increased heat exchange efﬁciency. - Electronic expansion device permits operation at a lower condensing pressure and improved utilisation of the evaporator heat exchange surface. Optimised electrical performance All 30XWHV units comply with class 3 of standard EN618003. Category C3 refers to industrial environments. With option 282 category C2 compliance is possible. - Inverter-driven motors ensure negligible start-up current (value is lower than the maximum unit current draw) Transport simulation test in the laboratory on a vibrating table and then on an endurance circuit (based on a military standard).
Easy and fast installation
Compact design - The 30XWHV units are designed to offer compact dimensions for easy installation. - With a width of approximately 1.25 m up to 1000 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 supply to the integrated control circuit (400/24 V) Simplified water 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.
Designed to support green building design
Design teams increasingly focus on designing “green buildings” to address today’s energy efficiency and environmental sustainability needs. The air conditioning system uses between 30% and 40% of the annual building energy consumption. Selection of the right air conditioning unit is one the main aspects to consider when designing a green building. For buildings with a variable load throughout the year 30XWHV units offer the solution to this important challenge.
Minimised operating sound levels
The inverter technology used for the compressor motors minimises noise levels at part load operation. In twocompressor units at 25% of the maximum load the unit sound power level is reduced by 10 dB(A). Standard unit features include: - Silencers on the compressor discharge line. - Sound insulation on the components that are most subjected to radiated noise. Option 257 further reduces the global unit sound level.
Inverter-driven screw compressors - Industrial-type screw compressors with oversized bearings and motor cooled by suction gas. - The inverter is optimised for each compressor motor to ensure reliable operation and easy maintenance. - All compressor components are easily accessible on site minimising down-time. Refrigerant circuits - 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 - Automatic compressor unloading in case of abnormally high condensing pressure or discharge temperature. Exceptional endurance tests - Partnerships with specialised laboratories and use of limit simulation tools (ﬁnite element calculation) for the design of critical components. 562
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