AIR-COOLED LIQUID CHILLERS WITH
INTEGRATED HYDRONIC MODULE 30RB 602-802
Features and advantages
Easy and fast installation
■■ Simplified electrical connections
-- Main disconnect switch with high trip capacity (see
table of options)
-- 24 V control circuit without risk from a transformer
included
■■ Fast commissioning
-- Systematic factory operation test before shipment
-- Quick-test function for step-by-step verification of the
instruments, electrical components and motors
Economical operation
COOLING
■■ Non-ozone depleting R-410A refrigerant
-- Chlorine-free refrigerant of the HFC group with zero
ozone depletion potential
-- Very efficient - gives an increased energy efficiency
ratio (EER)
-- 40% reduction in the refrigerant charge through use of
the micro-channel heat exchangers (MCHE)
■■ Leak-tight refrigerant circuit
-- Brazed refrigerant connections for increased leaktightness
-- Reduction of leaks as no capillary tubes and flare
connections are used
-- Verification of pressure transducers and temperature
sensors without transferring refrigerant charge
Superior reliability
■■ State-of-the-art concept
-- Cooperation with specialist laboratories and use of
limit simulation tools (finite element calculations) for
the design of the critical components, e.g. motor
supports, suction/discharge piping
-- Compressor control box installed on the cold side of
the compressor (Carrier patent)
-- All-aluminium micro-channel heat exchanger (MCHE)
offers 3.5 times higher corrosion resistance than a
conventional coil. The all-aluminium construction
eliminates the formation of galvanic currents between
aluminium and copper that are responsible for the coil
corrosion in saline or corrosive atmospheres.
■■ Auto-adaptive control
-- Control algorithm prevents excessive compressor
cycling and permits reduction of the water quantity in
the hydronic circuit (Carrier patent).
-- Automatic compressor unloading in case of
abnormally high condensing pressure. If an anomaly
occurs (e.g. fouled condenser coil, fan failure)
AquaSnap continues to operate, but at reduced
capacity.
■■ Exceptional endurance tests
-- Corrosion resistance tests in salt mist in the laboratory
-- Accelerated ageing test on components that are
submitted to continuous operation: compressor
piping, fan supports
-- Transport simulation test in the laboratory on a
vibrating table. The test is based on a military
standard and equivalent to 4000 km by truck.
CONTROLS
■■ Increased energy efficiency at part load
-- Eurovent energy efficiency class (in accordance with
EN14511-3:2011) B to D
-- The refrigerant circuit includes several compressors
connected in parallel. At part load, around 99% of
the operating time, only the compressors that are
absolutely necessary operate. At these conditions
the compressors operating are even more energy
efficient, as they use the total condenser and
evaporator capacity.
-- The electronic expansion device (EXV) allows
operation at a lower condensing pressure (EER
optimisation).
-- Dynamic superheat management for better utilisation
of the evaporator heat exchange surface
-- All-aluminium micro-channel condenser (MCHE), more
efficient than a copper/aluminium coil
■■ Reduced maintenance costs
-- Maintenance-free scroll compressors
-- Fast diagnosis of possible incidents and their history
via the Pro-Dialog Plus control
-- R-410A refrigerant is easier to use than other
refrigerant blends
Environmentally balanced
HEATING HEATING
■■ Compressors
-- Low-noise scroll compressors with low vibration level
-- The compressor assembly is installed on an
independent chassis and supported by flexible antivibration mountings
-- Dynamic suction and discharge piping support,
minimising vibration transmission (Carrier patent)
-- Acoustic compressor enclosure, reducing radiated
noise emissions (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 installation for reduced noise (Carrier patent)
AIR TREATMENT
Quiet operation
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