QTIF

QTIF

· Input for analog transmitter 4-20 mA 2 or 3 wires for water system pressure detection;

· N. 3 general start up and command inputs for floats or pressure switches;

· Relay alarm output with changeover contact N.O./N.C.(250 V~ 5 A max, resistive load);

· Modbus-RTU RS-485 communication;

· Command with selector, control panel with LCD display;

· Constant pressure mode at variable speed’ mode: - pressure detection through analog transmitter;

- pressure adjustment through the inverter PID controlleraccording to the set value;

- control of the pump through inverter at variable speed;

- stop for ‘null flow’ (flow absence) and automatic restart once the pressure decreases;

· Stop and run for the intervention of floats or pressure switches connected with the command and start up inputs;

· Operation in MANUAL mode at fixed preset speed;

· Main disconnecting switch with door lock;

· Electronic protection for motor overload or phase absence;

· Electronic protection for motor overtemperature without PTC motor sensor aid;

· Protection for analog transmitter lack or fault;

· Inverter supply and auxiliary circuit protection fuses;

· 24 Vdc auxiliary circuit;

· Forced ventilation (according to the model);

· Very low voltage inputs;

· RFI noise filter for EMC civil environment use(power supply connected with the public network);

· Maximum motor cable length: 30 m with shielded cable, 40 m with unshielded cable.