manuale_EMERITUS_4.0_(MULTI_LANGUAGE)

18 Motorized modulating valves, solenoid valves, pressure and temperature probes, non-return valve 3.7.1 The motorized modulating valve (model LR24A-SR-TP) installed on the water supply line to the adiabatic packs regulates the water quantity. It is driven by a controller which, based on the differential between the value of a set point and the real-time measurement taken by the flow meter, sends a command signal. Diagram of connection and power supply voltage : 3.7.2 The solenoid valves acting on the various parts of the plant have a 230VAC power supply. They are driven by the controller depending on the requirement for the intervention of the resources (spray, adiabatic panel and draining of the system). The diameter of the connectors is ¾”. EV1-4 spray solenoid valve: normally open EV5-6 adiabatic panels solenoid valve: normally open EV aux solenoid valve: normally open EV SC1-2 drain solenoid valve: normally open EV line solenoid valve: normally closed 3.7.3 The pressure and temperature probes permit the controller to monitor and activate the resources of the system. Pressure transducer: Power supply: 8-33VDC output signal: 4-20mA Range: 0-15 barg NTC temperature sensor: Characteristic: 10kΩ@25°C 3.7.4 The non-return valve positioned on the pump supply line is immediately before the branching of the supply line of the adiabatic panels from the mains water supply line: This avoids the return of water to the tank when the panels operate alone, supplied from the mains, and not by the pump.