Features and advantages
COOLING
Low energy consumption
■■ The 30XW-V/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: EER up
to 5.5 and ESEER up to 8.0
-- EER up to 5.8 kW/kW and ESEER up to 9.5 kW/kW
(gross adjusted performances, not taking into account
the water pump and heat exchanger pressure drops,
given as a reference for comparison).
■■ 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 30XW-V/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
■■ 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 30XW-V/30XWHV units
offer the solution to this important challenge. For more
details refer to page 4.
High reliability
■■ 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.
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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.
-- 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 30XW-V/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.
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.
New inverter-driven Thunderbolt screw
compressor
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