DUCTABLE AIR-COOLED LIQUID CHILLERS
30RBSY 039-160
Hydronic module
Economical operation
■■ Variable-speed pump (option)
-- The control algorithm adjusts the water flow rate in
accordance with the actual system requirements.
This saves energy and makes the flow control valve
unnecessary.
■■ Variable-speed fan
-- Variable-speed ventilation permits adjustment to
any duct type and variation of the air flow rate for
maximised unit EERs and COPs under any operating
conditions.
■■ Increased energy efficiency at part load
-- Eurovent energy efficiency class A and B in cooling
mode and A in heating mode (in accordance with
EN14511-3:2013)
-- 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 more energy efficient, as
they use the total condenser and evaporator capacity.
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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 etc.
--
HEATING HEATING
Supply air connection frame
All aluminium micro-channel heat exchanger (MCHE) on
cooling only units (30RBSY), offers increased corrosion
resistance compared to traditional coils. The all-aluminium
design eliminates the formation of galvanic currents between
aluminium and copper that cause coil corrosion.
■■ Auto-adaptive control
-- Control algorithm prevents excessive compressor
cycling and permits reduction of the water quantity in
the hydronic circuit (Carrier patent)
-- Hydronic module with integrated pressure transducers
allowing measurement of the water pressure at two
points, as well as measurement of the water flow
rate and detection of lack of water and pressure.
This considerably reduces the risk of problems such
as frost accumulation on the water heat exchanger.
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CONTROLS
-- Single or dual water pump (as required) with operating
time balancing and automatic changeover to the backup pump if a fault develops
-- Water filter protects the water pump against
circulating debris
-- Pressure measurement, using two pressure
transducers and allowing indication of water flow rate,
water pressu re and lack of water.
-- High-capacity membrane expansion tank ensures
pressurisation of the water circuit
-- Overpressure valve, set to 4 bar
-- Speed variator on the pumps (option) to ensure the
correct flow rate, based on the system requirements
-- Thermal insulation and frost protection down to -20°C,
using an electric resistance heater (see table of
options)
■■ Simplified electrical connections
-- A single power supply point without neutral
-- Main disconnect switch (option 70) with high trip
capacity
-- Transformer for safe 24 V control circuit supply included
■■ Fast commissioning
-- Systematic factory operation test before shipment
-- Quick-test function for step-by-step verification of the
instruments, electrical components and motors
■■ Non-ozone depleting R410A refrigerant
-- Chlorine-free refrigerant of the HFC group with zero
ozone depletion potential
-- Very efficient - gives an increased energy efficiency
ratio (EER, COP and ESEER)
-- 50% reduction in the refrigerant charge through the
use of micro-channel heat exchangers for the cooling
only units (30RBSY)
■■ Leak-tight refrigerant circuit
-- Brazed refrigerant connections for increased leaktightness
-- Reduction of leaks due to reduced vibration levels and
elimination of capillary tubes (TXVs)
-- Verification of pressure transducers and temperature
sensors without transferring refrigerant charge
AIR TREATMENT
Environmentally balanced
COOLING
-- The electronic expansion device (EXV) allows operation
at a lower condensing pressure (EER, COP and
ESEER optimisation).
-- Dynamic superheat management for better utilisation
of the water heat exchanger surface.
-- Defrost cycle optimisation (30RQSY)
■■ Reduced maintenance costs
-- Maintenance-free scroll compressors
-- Fast diagnosis of possible incidents and their history
via the Touch Pilot Junior control
-- R410A refrigerant is easier to use than other
refrigerant blends