Split system Water chillers
- Removable galvanised metal panels - RAL 7024 and RAL 7035 lacquer coating Built-in electric motor cooled by suction gases Motor protected by internal winding thermostat Placed on anti-vibration mounts Integrated crankcase heater Brazed-plate exchanger(s) End and inside plates in AISI 316 stainless steel High-performance, optimised plate patterns Thermal insulation
Hermetic SCROLL compressors
- Unit without condenser - Connection possible on CIAT OPERA-type air-cooled condenser - Refrigerating sleeves available as an option -
Dehumidifier filters with rechargeable cartridges Hygroscopic sight glasses Solenoid valves on liquid refrigerant lines Thermostatic expansion valves (700V to 1000V models) Electronic expansion valves (1100V to 2400V models) Electronic evaporation pressure controller.
Control functions and safety devices
Thermostatic or electronic expansion valve(s) Refrigerant high and low-pressure safety devices, Safety valves on refrigeration circuit Temperature and pressure sensors Evaporator water flow controller
Functions: - Operation information displayed via: • multilingual clear-text messages • direct temperature and pressure readings - complete management of compressors with start-up sequence, timer and runtime balancing Master/slave Management allows two machines to be controlled on a single water loop, by alternating the master and slave according to the running time. - Short-cycle protection - Self-adjusting and proactive functions with adjustment of settings drift control - Series stage system on multiple compressors reduces power according to cooling or heating demands measured from water temperature - Monitoring of internal operation parameters - Second setpoint management - Setpoint adjustment by 4-20 mA signal - Master/slave operation - Weekly programming - Direct readout of water temperatures - Diagnosis of operation and fault states: HP/LP, water flow, compressor motor(s), frost protection - Remote management and remote monitoring
CONNECT2 is equipped as standard with an RS485 serial port offering a range of remote management, monitoring and diagnostic options via the communication bus. Several contacts are available as standard, enabling the unit to be controlled remotely by cabled link: - automatic operation control: when this contact is open, the machine stops - setpoint 1/setpoint 2 selection: when this contact is closed, a second cold setpoint is activated (energy storage mode, for example) - setpoint adjustable by 4-20 mA signal: this input is used to adjust the setpoint - compressor load shedding: closing the contact or contacts concerned allows the power or cooling consumption of the machine to be limited by stopping one or more compressors - water pump 1 and 2 control: these outputs control the contact switches for one or two water pumps - fault reporting: this contact indicates the presence of a major fault which has caused one or both cooling circuits to stop.
The fully wired electrics box which houses all the electrical components and the electronic CPU board, controls the entire unit, monitors its operation, adjusts water setpoints and interfaces with an external control system. It comprises: - Control and power circuits - Wire numbering - Main safety switch with handle on front - Control circuit transformer - Circuit breakers on the power and control circuits - Compressor and motor switch(es) - Main earth connection - Microprocessor-controlled electronic control unit • CONNECT2 - Alarm or information signals on free terminals CIAT electronic control module with microprocessor and CPU, with central automatic operation and access to internal operation states. Features: - Start, stop, reset or remote control - Operating mode selector - Outputs RS485 for CMS link (ModBus-JBus) • additional potential-free (dry) contact card adapter • remote control adapter - Multilingual analogue LCD and LED display