DYNACIAT POWERTM Water cooled water chillers Description of the main components ■ Compressors - Master/slave management of the two machines in parallel Hermetic SCROLL type. with runtime balancing and automatic changeover if a fault - Built-in electric motor, cooled by intake gases. occurs on one machine. - Motor protected by internal winding thermostat. - Machine time schedule. - Placed on anti-vibration mounts. - Display and access to the operating parameters via a - multilingual LCD screen with 4 lines of 24 characters. ■ Evaporator ■ Remote management - Brazed-plate exchanger. - Stainless steel plates. CONNECT2 is equipped as standard with an RS485 serial port - Plate patterns optimised for high efficiency. offering a range of remote management,monitoring and - Armaflex thermal insulation. diagnostic options via the communication bus. ■ Condenser Several contacts are available as standard which enable theDYNACIATPOWER TMto be controlled remotely by wired link: - Brazed-plate exchanger. Automatic operation control: when this contact is open, the - - Stainless steel plates. machine stops. - Plate patterns optimised for high efficiency. Setpoint1/setpoint 2 selector: when this contact is closed, a - ■ Refrigerating accessories second cooling setpoint is activated (energy storage mode, for example). - Dehumidifier filters with rechargeable cartridges. Heating/cooling operating mode selection: this input switches - - Hygroscopic sight glasses. from one operating mode to another. - Solenoid valves on refrigerant lines (700V to 1200V Contact closed = heating mode. models). Contact open = cooling mode. - Thermostatic expansion valves (700V to 1000V models). Setpoint adjustable via4-20 mA signal: this input is used to - Electronic expansion valves (1100V to 2400V models). - adjust the setpoint in heating or cooling mode. ■ Regulation and safety instruments - Compressorload shedding: closing the contact(s) concerned allows the power or refrigerating consumption of the machine - High and low pressure sensors. to be limited by stopping one or more compressors. - High pressure safety valves. Water pump 1 and 2 control: these outputs control the - - Water temperature control sensors. switches for one or two water pumps. - Evaporator antifreeze protection sensor. Fault reporting: this contact indicates the presence of a major - - Factory-fitted evaporator water flow controller. fault which has caused one or both refrigerating circuits to ■ Electrics box stop. - IP 21. ■ Power control - 400V-3Ph-50 Hz power supply + Earth (+10%/-10%). Disconnect switch with handle on front. In-series staged power control system on the compressors: - Control circuit transformer. - 4 stages for 700V to 1600V models. - Circuit breaker for compressor motor. - 6 stages for 1800V and 2400V models. - Contact switches for compressor motor. - 8 stages for 2100V models. - - CONNECT2 microprocessor-controlled electronic control■ Casing module. - Wire numbering. Casing made from RAL 7024 and RAL 7035 painted panels. - Marking of the main electrical components. - RAL 7035. ■ CONNECT2 electronic control module The CIAT electronic control module performs the following main functions: - Regulation of the chilled or hot water temperature - Regulation of the water temperature based on the outdoor temperature (water law). - Regulation for low temperature energy storage. - Second setpoint management. - Complete management of compressors with start-up sequence, metering and runtime balancing. - Self-adjusting and proactive functionswith adjustment of parameters on drift control. - In-series staged capacity-reduction system on compressors based on cooling and heating demands. - Management of compressor short cycle protection. - Management of the machine operation limit according to outdoor temperature. - Operating and fault status diagnostics. - Management of a fault memory allowing a log of the last 20 incidents to be accessed, with operating readings taken when the fault occurs. CATALOGUE 2021 525 525