AIR-COOLED LIQUID CHILLERS 30XAS 242-482
Features and advantages
■■ Compressor
-- Discharge dampers integrated in the oil separator
(Carrier patent).
-- Silencer on the economiser return line.
-- Acoustic compressor and oil separator enclosure
reducing radiated noise (option).
■■ Condenser section
-- 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) are now even
quieter and do not generate intrusive low-frequency
noise
-- Rigid fan mounting preventing start-up noise (Carrier
patent)
Easy and fast installation
■■ Integrated hydronic module (option)
-- Centrifugal high-pressure dual water pump, with
operating time balancing and automatic changeover
to the back-up pump if a fault develops
-- Water filter protecting the water pump against
circulating debris
-- High-capacity membrane expansion tank ensures
pressurisation of the water circuit
-- Thermal insulation and aluminium protection (option)
-- Pressure sensor to check filter pollution and for direct
numerical display of the water flow rate with an estimate
of the instantaneous cooling capacity at the control
interface
-- Water flow control valve
■■ Simplified electrical connections
-- Main disconnect switch with high trip capacity
-- Transformer to supply the integrated control circuit
(400/24 V)
■■ Fast commissioning
-- Systematic factory operation test before shipment
-- Quick-test function for step-by-step verification of the
instruments, expansion devices, fans and compressor
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■■ Screw compressor
-- Industrial-type screw compressor 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
■■ Air condenser
All aluminium micro-channel heat exchangers (MCHE)
with high corrosion resistance. The all aluminium design
eliminates the formation of galvanic currents between
aluminium and copper that cause coil corrosion in saline
or corros ive environments
■■ Evaporator
Thermal insulation with aluminium sheet finish for perfect
resistance to external aggression (mechanical and UV
protection)
■■ Auto-adaptive control
-- Control algorithm prevents excessive compressor
cycling (Carrier patent)
-- Automatic compressor unloading in case of
abnormally high condensing pressure. If condenser
coil fouling or fan failure occurs, the AquaForce
continues to operate, but at reduced capacity
■■ Exceptional endurance tests
-- Partnerships with specialised laboratories and use of
limit simulation tool s (finite element calculation) for the
design of critical components.
-- Transport simulation test in the laboratory on a
vibrating table. The test is based on a military
standard and equi-valent to 4000 km by truck.
-- Salt mist corrosion resistance test in the laboratory for
increased corrosion resistance
COOLING
Absolute reliability
HEATING HEATING
Low operating sound levels
■■ R-134a refrigerant
-- Refrigerant of the HFC group with zero ozone depletion
potential
-- 30% reduction in the refrigerant charge through the
use of micro-channel heat exchangers
■■ Leak-tight refrigerant circuit
-- Reduction of leaks as no capillary tubes and flare
connec-tions are used
-- Verification of pressure transducers and temperature
sensors without transferring refrigerant charge
-- Liquid line service valve for simplified maintenance
(option)
AIR TREATMENT
■■ Extremely high full load and part load energy efficiency:
-- Eurovent energy efficiency class A to C.
-- Standardised Eurovent values in accordance with
EN 14511-3:2013: EER up to 3.2 and ESEER up to 4.
-- 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.
-- All aluminium condenser with high-efficiency microchannels.
-- Flooded shell-and-tube evaporator to increase the heat
exchange efficiency.
-- Electronic expansion device permitting operation at
a lower condensing pressure and improved utilisation
of the evaporator heat exchange surface (superheat
control).
-- Economizer system with electronic expansion device
for increased cooling capacity
Environmental care
CONTROLS
Very economical operation
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