DUNGS LGW...A1 - Pressure Switches for air, factory adjusted

[{"filename":"lgw-a1_datasheet_en_214748.pdf","text":"Differential pressure\n switch\n for air, flue and exhaust\n gases\n\n LGW...A1\n\n factory-adjusted\n\n 5.12\n\n\n\n\n Technical description Application\n The LGW...A1 is a factory-adjusted differ- Differential pressure monitoring in\n ential pressure switch as per EN 1854. firing, ventilation and air-conditioning\n systems.The LGW...A1 can be used as\n - The LGW...A1 is suitable for switch- a pressure, vacuum or differential pres-\n ing a circuit on, off or over on chang- sure switch for air and non-aggressive\n es in actual pressure value relative gases but not for industrial combustion\n to the reference value set at the gases.\n factory (reference value).\n Printed in Germany • Edition 2024.05 • Nr. 214 748\n\n\n\n\n - Precise function by special switch- Approvals\n ing system mounted in frictionless EC type testing certificate as per:\n bearings. • EC-Gas Appliances Regulation\n - Electrical connection by means of a • EC-Pressure Equipment Directive\n flat-type connector.\n - Compact size. Approvals in other important gas-\n consuming countries. Special designs\n for the North American market with UL,\n FM and CSA registrations.\n\n\n1…4\n\fFunctional description LGW…A1 differential pressure\nDifferential pressure switch in pressure switch\nand vacuum ranges. The control unit responds to differential\nThe differential pressure acts via the pressure. If the set reference value is\ndiaphragm against the force of the exceeded or undershot, the circuit is\nsetting spring on the microswitch. The switched on, off or over.\npressure switch operates without any\nauxiliary power.\n\n Definition of switching difference LGW…A1 switching function\n ∆p As pressure rises:\n The switching difference ∆p is the Pressure\n 1 NC opens, 2 NO closes\n pressure difference between the up- at meter\n Setting tolerance As pressure falls:\n Upper switching\n per and lower switching pressures. pressure 1 NC closes, 2 NO opens\n\n\n\n\n Falling\n 2 NO\n COM\n\n\n\n\n Adjustment as\n pressure rise\n Lower switching\n\n\n\n\n Rising\n pressure\n 3 (P)\n 1 NC\n p\n\n\n\n Dimensions [mm]\n 82\n 44\n □ 72 10\n (1) 6,9 53,75\n\n\n 53,75\n\n\n\n\n (2)\n\n\n\n\n ø 4,6\n 20\n (3)\n 8,6 16,2 ø 4,2 44,6\n (5) (4)\n\n Height with contact protection IP 20: 44 mm\n Height with contact protection IP 42: 44 mm\n (1) optional switching point lock cheese had screw ø 3 x 14 mm\n (2) optional sealing cap and connection p 3, ø 4,6 mm\n (3) Sealing face area for O-ring ø 4.87 x 1.8 to DIN 3371\n (4) Blind hole 8 x ø 3.8 deep\n (5) optionally Mounting of contact protection for cheese head screw ø 3 x 14 mm\n\n\n Pressure connection\n\n\n\n\n p1 p2 p3\n Connection p1 (+)\n = higher pressure + – +\n Connection p2 (-)\n = lower pressure\n\n Optional\n Connection p3 (+)\n = higher pressure\n\n\n 2…4\n\f Specifications\n\n Max. operating pressure Standard: 10 kPa\n\n Setting ranges Refer to \"Brief technical data\"\n\n Pressure connection 4.6 mm dia hose gland\n\n Temperature range Ambient temperature -15 °C to +85 °C\n Medium temperature -15 °C to +85 °C\n Storage temperature -30 °C to +85 °C\n\n Materials Housing:\t\t polycarbonate\n contact protection: polycarbonate\n Switch: \t\t\t polycarbonate\n Diaphragms: \t\t NBR\n Switching contact: standard: Ag\n \t\t\t\t optional: gold-plated silver (Au);\n \t\t\t\t suitable for DDC applications: 24 V DC; 0.02 A\n\n Switching voltage Ag - Contact: AC eff. min. 24 V\t\t max. 250 V\n DC min. 24 V\t\t max. 48 V\n Au - Contact: DC min. 5V max. 24 V\n\n Nominal current LGW 1.5 A1, Ag - Contact: AC eff. 2.5 A\n LGW 3 - 50 A1, Ag - Contact: AC eff. 10 A\n Au - Contact: \t\t\t DC 20 mA\n\n Switching current Ag - Contact. AC eff. 1.5 A\t\t at cos ϕ 1\n LGW 1.5 A1: AC eff. 0.8 A\t\t at cos ϕ 0.6\n Ag - Contact AC eff. 6 A\t\t at cos ϕ 1\n LGW 3 - 50 A1: AC eff. 3 A\t\t at cos ϕ 0.6\n Ag - Contact AC eff. min. 20 mA\n DC min. 20 mA max. 1 A\n\n Au - Contact: DC min. 5 mA max. 20 mA\n\n Electrical connection protective insulation\n A 6.3 x 0.8 flat-type connector as per DIN 46244\n optional: screw clamps included\n\n Degree of protection IP 00 as per IEC 529 (EN 60 529)\n IP 20 with BS3\n IP 42 with contact protection\n IP 42 with contact protection and traction relief\n\n Setting tolerance tolerance as per specification\n\n Deviation Permissible deviation of the set value ≤ ± 15 % in the service life test according\n to EN 1854\n\n Installation position As per specification\n\n\n\n\n3…4\n\f Differential pressure switch\n for air, flue and exhaust gases\n\n LGW ... A1\n\n factory-adjusted\n\n\n\n\nTechnical data\n1mbar = 1 hPa = 100 Pa = 0,1 kPa ≈ 10 mmWS \t\t 1 Pa = 0.01 mbar ≈ 0.1 mWS\n\n Type Version Order No. Adjustment ran- Switching differ- Max. operating\n ge (ex works) ence pressure\n [hPa] [Pa] [hPa]\n\n LGW…A1…