DUNGS GW...A4 HP - Pressure Switches for gas, air, flue

[{"filename":"gw-a4-hp_datasheet_en_241654.pdf","text":"High-pressure switch for\n gas, air, flue gases and\n combustion products\n\n GW…A4 HP\n GW…A4/2 HP\n 5.04\n\n\n\n\n Technical description Approvals\n The GW…A4 HP pressure switch is an EC type testing certificate as per:\n adjustable pressure switch as per EN • EC-Gas Appliances Regulation\n 1854 (GW 6000 A4 as per DIN 3398T3) • EC-Pressure Equipment Directive\n for burners.\n It is suitable for closing, opening or Approvals in other important gas-\n switching over a current circuit when consuming countries.\n the actual pressure value deviates from\n the specified pressure setpoint. The\n specified pressure setpoint (operating\n\n\n\n\n Printed in Germany • Edition 01.21 • Nr. 241 654\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 HP All gas-carrying parts are made of\nPressure switch for applications involv- The switching mechanism reacts to 1.4541 stainless steel and, therefore,\ning excess pressure. overpressure and closes, opens or are suitable for:\nGW…A4 HP switches over a current circuit when the - applications involving operating pres-\nThe pressure counteracts the force of specified pressure setpoint is overshot sures greater than 600 mbar\nthe setting spring on the micro-switch or undershot. - aggressive media such as sulphuric\nvia the metal bellows. The pressure acid up to a concentration of 1.0 %\nswitch does not require power assist- by vol., humid\nance. - fluids (on request)\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 GW…A4, Design: Metal housing\n Degree of protection IP 65\n p\n N against the entry of dust (dust sealed).\n \t\t6 Protection\n \t\t Protection against access to hazardous parts with a wire, ø ≥ 1 mm\n \t\t\n IP 65 Complete contact protection\n\n \t\t5 Protection against a water jet from a nozzle directed at the unit (housing) from\n \t\tany directions\n No hazardous conditions may result (water jet).\n\n\n\n\n 2…6\n\f Specifications\n Max. operating pressure GW 500 A4 HP\t\t pmax = 2 bar (gas) @ setting range 0.1 - 0.15 bar\n \t\t\tpmax = 5 bar (gas) @ setting range 0.15 - 0.5 bar\n\n GW 2000 A4 HP pmax = 5 bar (gas)\n GW 6000 A4 HP pmax = 8 bar (gas)\n Pressure connection p+: centrally on underside of housing internal thread G 1/4 and Rp 1/4, Gas or air\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 HP\n Housing lower section aluminium die casting\n Switch\t\t polycarbonate\n Switching contact standard:\n \t\t\tsilver gold-plated (Au), suitable for\n \t\t\tDDCapplications: DC 24 V; 0,02 A\n Metal bellows\t\t 1.4541 (stainless steel)\n Hood\t\t\t polycarbonate\n\n GW…A4/2 HP\n Hood\t\t\t die cast zinc, powder coated\n Switching voltage AC eff. min. 24 V max. 250 V\n DC min. 24 V max. 48 V\n DDC application: DC min. 5 V max. 24 V\n Nominal current AC eff. 10 A\n DDC application: DC max. 20 mA\n Switching current 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 DDC application: DC min. 5 mA max. 20 mA\n Electrical connection Plug connection for line sockets as pert\n DIN EN 175 301-803, 3-pin with protection contact\n Degree of protection GW…A4 HP IP 54 to IEC 529 (EN 60529), (clear hood)\n GW…A4/2 HP IP 65 to 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 Deviation Permissible deviation of the set value ≤ ± 15 % in the service life test according\n to EN 1854\n\n\n\n\n3…6\n\fDimensions [mm]\nGW…A4 HP\t\t\t\t\n\n G 1/4 and Rp 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 4 x ø 4,2\n\n\n M20 x 1.5 or plug-type\n connection for\n cable socket according to DIN EN 175 301-803\n\n\n\n\nGW…A4/2 HP IP 65\nwith metal housing, plug-in connection for sockets\nin according to DIN EN 175 301-803\n\n\n\n 67,6\n 1 2\n\n 3\n 81\n 38,2\n\n\n\n\n SW 21\n\n\n\n\n 4 self-tapping cylinder bolts\n M3 x 14\n slot 0.8 and cross slot to 77\n DIN 7962-Z2 53,75\n ø 4,2 - 0,2\n +\n\n\n\n\n 38,5\n\n\n\n\n G 1/4\n\n\n\n\n G 1/4 and Rp 1/4\n pressure\n connection gas or air\n SW = Wrench width\n\n\nInstallation position\n Standard installation position; if a different installation position is used,\n α\n pay attention to the…