HEATING
Features and advantages
Low energy consumption
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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
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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 .
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Flooded multi-pipe heat exchangers for increased heat exchange efficiency .
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Electronic expansion device permits operation at a lower condensing pressure and improved utilisation of the evaporator heat exchange surface .
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Optimised electrical performance All 30XWHV units comply with class 3 of standard EN61800- 3 . 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 )
Designed to support green building design
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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 .
High reliability
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Inverter-driven screw compressors --
Industrial-type screw compressors with oversized bearings and motor cooled by suction gas .
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The inverter is optimised for each compressor motor to ensure reliable operation and easy maintenance .
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All compressor components are easily accessible on site minimising down-time .
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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 .
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Evaporator --
Electronic paddle-free flow switch . Auto-setting according to cooler size and fluid type .
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Auto-adaptive control --
Control algorithm prevents excessive compressor cycling
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Automatic compressor unloading in case of abnormally high condensing pressure or discharge temperature .
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Exceptional endurance tests --
Partnerships with specialised laboratories and use of limit simulation tools ( finite element calculation ) for the design of critical components .
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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
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Compact design --
The 30XWHV units are designed to offer compact dimensions for easy installation .
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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 .
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Simplified electrical connections --
Main disconnect switch with high trip capacity
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Transformer supply to the integrated control circuit ( 400 / 24 V )
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Simplified water connections --
Victaulic connections on the evaporator and condenser
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Practical reference marks for entering and leaving water connections
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Possibility to reverse the heat exchanger water inlet and outlet at the factory
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Possibilty to modify the number of heat exchanger passes
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Fast commissioning --
Systematic factory operation test before shipment
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Quick-test function for step-by-step verification of the instruments , expansion devices and compressors .
Minimised operating sound levels
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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 ).
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Standard unit features include : --
Silencers on the compressor discharge line .
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Sound insulation on the components that are most subjected to radiated noise .
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Option 257 further reduces the global unit sound level .
New inverter-driven Thunderbolt screw compressor
■ ■ The new generation of Carrier inverter-driven screw compressors benefits from Carrier ’ s long experience in the development of twin-rotor screw compressors . The design of the Thunderbolt compressors is based on the successful 06T screw compressors .
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