DUNGS GW 500 A4 - Pressure Switches for gas, air, flue, exhaust gases and hydrogen

[{"filename":"gw-500-a4_datasheet_en_255960.pdf","text":"Pressure switch for gas,\n air, flue gases and com-\n bustion products\n\n GW 500 A4\n GW 500 A4/2\n 5.09\n\n\n\n\n Technical description GW 500 A4: Free of non-ferrous met-\n The GW…A4 pressure switch is an als, suitable for gases up to max. 0.1 %\n adjustable pressure switch as per EN by vol. H2S, dry.\n 1854 (GW 6000 A4 as per DIN 3398T3)\n for burners. Approvals\n It is suitable for closing, opening or EC type testing certificate as per:\n switching over a current circuit when • EC-Gas Appliances Regulation\n the actual pressure value deviates from • EC-Pressure Equipment Directive\n the specified pressure setpoint. The Approvals in other important gas-\n specified pressure setpoint (operating consuming countries.\n\n\n\n\n Printed in Germany • Edition 01.21 • Nr. 255 960\n point) is set at a setting wheel using\n a scale.\n\n Application\n Pressure monitoring in burner control\n systems\n Suitable for gases of gas families 1,2,3\n and other neutral gaseous media, as\n well as air, flue gases and combustion\n products.\n1…6\n\fFunctional Pressure switch GW…A4\nPressure switch for applications involv- The switching mechanism reacts to\ning excess pressure. overpressure and closes, opens or\nGW 500 A4 switches over a current circuit when the\nThe pressure switch acts via a rubber specified pressure setpoint is overshot\ndiaphragm against the force of the set- or undershot.\nting spring on the micro-switch.\n\n\n\n\n Switching function Definition of switching difference ∆p\n The switching difference ∆p is the\n As pressure rises: pressure difference between the up-\n 1 NC opens, 2 NO closes. per and lower switching pressures.\n As pressure falls:\n 1 NC closes, 2 NO opens.\n\n Pressure\n at meter\n Setting tolerance\n\n 2 NO Upper switching\n pressure\n COM\n\n\n Switching difference, ∆p\n 3 Falling\n\n 1 NC\n Adjustment as\n p Rising\n Lower\n\n pressure falls\n switching\n pressure\n\n\n\n 2 NO\n COM\n 1 NC\n 3 Design: Clear\n GW…A4, cover\n Degree of protection IP 54\n\n \t\t5 Protection against ingress of solid particles ø ≥ 1 mm\n \t\t pProtection\n N against access to hazardous parts with a wire, ø ≥ 1 mm\n \t\t\n IP 54 Complete contact protection\n\n 2 NO\n \t\t4 Protection against a water jet.\n No hazardous conditions may result.\n COM\n 3 1 NC\n LGW…A4/2, Design: Metal housing\n Protection class: IP 65\n p\n N against the entry of dust (dust sealed).\n \t\t6 Protection\n Protection against access to hazardous parts using ø ≥ 1 mm wire\n IP 65 Complete contact protection\n\n \t\t5 Protection against a water jet from a nozzle directed at the unit (housing)\n \t\t from any directions\n No hazardous conditions may result (water jet).\n\n\n\n\n 2…6\n\f Specifications\n\n Max. Betriebsdruck GW 500 A4\t\t 600 mbar (60 kPa)\n Pressure connection p+: centrally on underside of housing, G 1/4 internal thread to ISO 228: Gas or air\n Special version: additional G 1/4 internal thread at side\n Temperature range Ambient temperature -15 °C to +70 °C\n Medium temperature -15 °C to +70 °C\n Storage temperature -30 °C to +80 °C\n Materials GW…A4\n Housing lower section aluminium die casting\n Switch Polycarbonat\n Switching contact Standard: Silber (Ag)\n Optional: gold-plated (Au) silver, suitable for\n DDC applications: DC 24 V; 0.02 A\n Diaphragm NBR\n Hood polycarbonate\n\n GW…A4\n Housing lower section aluminium die casting\n Switch Polycarbonat\n Switching contact Standard: Silber (Ag)\n Optional: gold-plated (Au) silver, suitable for\n DDC applications: DC 24 V; 0.02 A\n Diaphragm NBR\n Hood Extrusion cast zinc, powder-coated\n\n Switching voltage Ag contact AC eff. min. 24 V max. 250 V\n DC min. 24 V max. 48 V\n Au contact DC min. 5 V max. 24 V\n Nominal current Ag contact AC eff. 10 A\n Au contact DC 20 mA\n Switching current Ag contact AC eff. min. 20 mA max. 6 A with cos ϕ 1\n AC eff. \t\t max. 3 A with cos ϕ 0,6\n DC min. 20 mA max. 1 A\n Au contact DC min. 5 mA max. 20 mA\n Electrical connection Plug connection for line sockets as per\n DIN EN 175 301-803, 3-pin with protection contact\n Degree of protection GW…A4\t\t IP 54 to IEC 529 (EN 60529), (clear hood)\n GW…A4/2 IP 65 as per IEC 529 (EN 60529), (metal housing)\n Adjustment With rising pressure and installed in a vertical position.\n Optional rising or dropping pressure adjustment on-site possible.\n Note switch point change if installation position changes.\n Setting tolerance ±15 % switch point deviation based on the setpoint and with unit installed in a\n vertical position\n\n\n\n\n3…6\n\fDimensions [mm]\nGW 500 A4\t\t\t\t\n\n\n\n\n G 1/4 pressure connection\n 76\n 53,75 (LK 76)\n\n +\n\n\n\n\n 72\n\n G 1/4\n\n\n\n\n Made in Germany\n\n\n\n\n M20 x 1.5 or plug-type 4 x ø 4.2\n connection for cable socket according to for screws M4 ISO 1207, 912\n DIN EN 175 301-803\n\n\n\n\nInstallation position\n α\n Standard installation position; if a different installation position is used,\n pay attention to the changed operating points:\n GW 500 A4\t\t ca. ± 5 mbar\n\n\n When installed horizontally, the pressure switch switches at a pres-\n α sure higher\n\n α\n\n When installed horizontally overhead, the pressure switch switches at\n a pressure lower\n\n\n When installed at an intermediate position, the pressure switch\n α responds if there is maximum upper or lower pressure deviation w.r.t.\n the set pressure reference value.\n\n\n\n\n 4…6\n\f pressure exeeds or drops below the\n adjusted setpoint.\n GW…A4/2 Metal housing, powder-coated (IP 65)\n Designation Differential pressure switch switches when\n the pressure exeeds or drops below the\n adjusted setpoint.\n GW 500 A4 Ag-M-MS9-V0-VS3\n\n 12…