Calculation unit for heat metering systems - 2 pipes(ECCM32)

General Features: The calculator features separate sections able to simultaneously record the following: • thermal energy in a heating and cooling circuit; • sanitary cold water volume; • sanitary hot water volume; The unit has been designed to facilitate the installation and reduce the time needed for the commissioning operations. The ECCM32 unit is equipped with a wired “M-Bus” interface and a wired “Local-bus” interface that allow the user to read, by means of compatible equipment, the consumption from inside one’s own apartment; Ambient operating temperature: +5 ÷ +55 °C; Storage temperature: -20 ÷ +55 °C; Dimensions: 141 x 77,5 x 47 mm; Degree of protection: IP52; Environmental class: A (E1, M1); Maximum value of thermal power: 33000 kW with a pulse rate < 100 l/pulse; 330000 kW with a pulse rate ≥ 100 l/pulse; Temperature measurement range: 2 ÷ 150°C (Θmin=2°C Θmax=150°C); Temperature difference: 3 ÷ 148°C (ΔΘmin=3°C ΔΘmax=148°C); Heating/cooling switching: According to the sign of temperature difference between sensors (ΔΘ); in any case, no energy

recording takes place in case of –3°C < ΔΘ < +3°C; Display unit features: Liquid crystal display (LCD) with 8 digits, 19 icons and 2 auxiliary digits; Energy measurement unit on the LCD: MWh (standard), configurable kWh, MJ and GJ; Type of sensors: Pt500 sensors pairs with 2-wire lead (Platinum precision resistor, IEC 60751 compliant; Type of sensor cables: Unshielded; RMS Sensor current value: < 72 µA (measurements made every 30 seconds); Pulse inputs: One input for the heating/cooling flow meter; two inputs for the sanitary water flow meters; Pulse inputs class: IB (in accordance with the EN 1434-2 Standard); Pulse inputs circuit type: Pull-up (1 MΩ) with reference to ground (GND terminal); voltage: +3.6 V; Pulse input compatibility: Flow Meters with class OA (reed output) and class OC (open-collector) pulse outputs; Max. frequency / Pulse min. duration: 5Hz – 100ms; Flow Meter installation position: Return (standard), configurable on the forward; Pulse rate: 1 – 2,5 – 10 – 25 – 100 – 250 – 1000 – 2500 litres/pulse; Heat carrier fluid: Water (standard), configurable for water and glycol solution; M-Bus communication interface: Compliant to EN 1434-3, with galvanic separation; M-Bus baud rate: 2400 baud (standard), also configurable to 300 or 9600 baud; Type of cable for M-Bus connection: Telephone cable J-Y(ST) Y2 x 2 x 0,8mm² ; Local Bus interface: Compliant to EN 13757-6, 2400 baud, proprietary unidirectional protocol; Type of cable for Local Bus connection: Two wire cable (2 x 0.6mm² , max. length: 50m); Billing recording: 12 fixed monthly recordings, two periods with programmable dates (DD/MM); Anomaly/alarm recording: Circular log, four events (type of event and date); Other recordings: Heat carrier fluid max. flow rate and max. power; Type of connections: Removable, 14-pole terminal block (5mm pitch)

Electric Features: Power supply: Battery-operated; Battery rated voltage: 3,6V; Type of battery: Pre-wrapped package (2xAA – capacity: 4.8 Ah – spare part code: 1592269); Battery life: 10 years operation + 1 year stock