AIR-COOLED LIQUID CHILLERS 30RB 017-040
■■ 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.
■■ Auto-adaptive control
-- Control algorithm prevents excessive compressor
cycling and permits reduction of the water quantity in
the hydronic circuit (Carrier patent)
■■ 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.
Controls
Pro-Dialog+ control
Pro-Dialog+ combines intelligence with operating simplicity.
The control constantly monitors all machine parameters and
precisely manages the operation of compressors, expansion
devices, fans and of the water heat exchanger water pump
for optimum energy efficiency.
Pro-Dialog+ interface
%
%
°C
°C
Circuit B Total Capacity
START/STOP
ENTER
PRO-DIALOG+
CONTROLS
■■ Energy management
-- Seven-day internal time schedule clock: Permits unit
on/off control and operation at a second set point
-- Set point reset based on the outside air temperature
or the return water temperature or on the water heat
exchanger delta T
-- Master/slave control of two units operating in parallel
with operating time equalisation and automatic
change-over in case of a unit fault.
-- Change-over based on the outside air temperature
■■ Integrated features
-- Night mode: Capacity and fan speed limitation for
reduced noise level
■■ Ease-of-use
-- The new backlighted LCD interface includes a manual
control potentiometer to ensure legibility under any
lighting conditions.
-- The information is displayed clearly in English, French,
German, Italian and Spanish (for other languages
please consult Carrier)
A simple two-wire communication bus between the RS485
port of the AquaSnap and the Carrier Comfort Network
offers multiple remote control, monitoring and diagnostic
possibilities. Carrier offers a vast choice of control products,
specially designed to control, manage and supervise the
operation of an air conditioning system. Please consult
your Carrier representative for more information on these
products.
-- Start/stop: Opening of this contact will shut down the
unit
-- Dual set point: Closing of this contact activates a
second set point (example: Unoccupied mode)
-- Alert indication: This volt-free contact indicates the
presence of a minor fault
-- Alarm indication: This volt-free contact indicates the
presence of a major fault that has led to the shutdown of the unit
-- User safety: This contact can be used for any
customer safety loop, closing of the contact
generates a specific alarm
-- Out of service: This signal indicates that the unit is
completely out of service
-- Unit capacity: This analogue output (0-10 V) gives an
immediate indication of the unit capacity
-- Compressor operation: This contact signals that the
compressor is in operation
AIR TREATMENT
0
100
4.2
-28.9
dsable
HEATING HEATING
Remote operating mode with
volt-free contacts (standard)
\\MAINMENU\STATUS
CAPB_T
DEM_LIM
SP
CTRL_PNT
EMSTOP
-- The Pro-Dialog+ navigation uses intuitive treestructure menus, similar to the Internet navigators.
They are user-friendly and permit quick access
to the principal operat-ing parameters: number
of compressors operating, suction/discharge
pressure, compressor operating hours, set point, air
temperature, entering/leaving water temperature.
COOLING
Superior reliability
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7
53