SIT Gas block Nova 0822111

SIT Group 8 2 2 N O VA M U LT I F U N C T I O N A L C O N T R O L F O R G A S DOUBLE AUTOMATIC SOLENOID SHUT-OFF VALVE SERVO-CONTROLLED PRESSURE REGULATOR ALL ADJUSTMENTS ACCESSIBLE FROM ABOVE PIN 63AP7060/2  AUTOMATIC MULTIFUNCTIONAL CONTROL Multifunctional control with two near-silent automatic shut-off valves. Servo-controlled pressure regulator. Step ignition device on request. 822 NOVA is suitable for installation on gas appliances fitted with automatic ignition and flame failure systems, with or without intermittent pilot burner. MAIN FEATURES Two near-silent automatic shut-off valves. Servo-controlled pressure regulator. Step ignition device (optional). Pilot outlet with gas flow restrictor. Inlet and pilot filters. Inlet and outlet pressure test points. Threaded gas inlet and outlet with provision for flange connection. Connection for pressure regulator / combustion chamber compensation.  DESCRIPTION 1 Shut-off solenoid valve EV1 8 Main gas outlet 2 Pressure regulator setting device 9 Holes (M5) for fixing flanges 3 Pilot gas flow restrictor 10 Supplementary valve body fixing 4 Inlet pressure test point points 5 Outlet pressure test point 11 Connection for pressure regulator / 6 Shut-off solenoid valve EV2 combustion chamber compensation 7 Pilot outlet 7 1 2 3 9 8 10 4 5 6 11 TECHNICAL DATA • Gas connections: Rp 1/2 ISO 7 • Installation position: any position ELECTRICAL DATA • Gas families: I, II and III AUTOMATIC VALVES EV1 Class B EV2 Class D • Maximum gas inlet Voltage (AC) 230 V 50 Hz Consumption (mA) 45 Consumption (mA) 23 pressure: 60 mbar 220 V 60 Hz 45 25 • Outlet pressure 24 V 50 Hz 450 210 setting range: 3...30 mbar (20...50 on request) 24 V 60 Hz 450 220 • Working temperature range: 0...60 °C Eletctrical protection rating IP 54 with 002 type IP 54 using 160 type • Pressure regulator: Class B connector and fixing screw connectors with screw and • Automatic solenoid valve: EV1 Class B (Class A on request) code 0.960.125 gasket, code 0.960.104 • Automatic solenoid valve: EV1 Class D (Class C on request) Data refer to EN 126  DIMENSIONS 120,5 M10x1 131 M5 116 18 77 66.4 18 Rp1/2 Rp1/2 35 5 18 18 127 29 29 11 131 58 94 P I L OT 12 30 25.5 36.5 50.5 E A 24 41 70.5 FLOW RATE AS A FUNCTION OF PRESSURE DROP Q [m3/h d=0,6] CLASS B+D CLASS B+D 10 I Family (d = 0.45) Q = 7.5 m3/h Æp = 5 mbar CLASS B+C II Family (d = 0.6) Q = 6.5 m3/h Æp = 5 mbar 8 III Family (d = 1.7) Q = 8.1 kg/h Æp = 5 mbar 6 4 CLASS B+C I Family (d = 0.45) Q = 7.5 m3/h Æp = 5 mbar 2 II Family (d = 0.6) Q = 6.5 m3/h Æp = 5 mbar 0 III Family (d = 1.7) Q = 8.1 kg/h Æp = 5 mbar 5 10 Dp [mbar]  OPERATION Reading the inlet pressure The inlet pressure can be read at the pressure test point E with or without both automatic shut-off valves energized. Pilot burner ignition When the automatic shut-off valve EV1 is powered, it permits the gas to supply the pilot burner outlet (applications with intermittent pilot) after passing through the inlet filter, the pilot filter and the pilot flow rate restrictor. Main burner ignition When both automatic valves, EV1 and EV2, are energized, gas passage to the main burner is opened. Outlet pressure The outlet pressure is read at the test point A. PILOT EV1 EV2 E A REGULATED FLOW RATE IN ACCORDANCE WITH EN 88 Q = [m3/h d=0.6] 14 CLASSES B+D 12 10 Inlet pressure range 8 2L Gas type 6 Nominal Max. Min. 4 2H 20 25 17 2H 2 2L 25 30 20 0 Outlet pressure tolerance +10% ...-15% 6 8 10 12 14 16 18 Pu [mbar] Q = [m3/h d=0.6] 14 12 CLASSES B+C 10 Inlet pressure range 8 2L Gas type 6 Nominal Max. Min. 4 2H 20 25 17 2H 2 2L 25 30 20 0 Outlet pressure tolerance +10% ...-15% 6 8 10 12 14 16 18 Pu [mbar]  INSTALLATION Main gas connection The connection is made using gas pipes with Rp 1/2 ISO 7…