AIR-COOLED LIQUID CHILLERS 30RB 017-040 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. 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.
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. 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.
\\MAINMENU\STATUS CAPB_T DEM_LIM SP CTRL_PNT EMSTOP 0 100 4.2 -28.9 dsable % % °C °C
Remote operating mode with volt-free contacts (standard)
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
Circuit B Total Capacity
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)