DUNGS AA-A2 - Pressure Switches for air, flue and exhaust gases (US/CA)

[{"filename":"aa-a2_datasheet_us_226358.pdf","text":"Differential Pressure Switch\n for air, flue and exhaust gases\n\n AA-A2…\n\n\n\n\n Approvals AA-A2-4 / AA-A2-6\n\n UL Listed\n • UL 353\n • File # MH 16628\n\n CSA Certified\n • CSA C22.2 No. 14\n • File # 201527\n\n FM Approved\n • Class 3510, 3530\n • File # J.I. 0D6A1.AF\n\n Commonwealth of Massachusetts\n Approved Product\n • Approval code G3-0106-191\n • Air pressure switch for differential,\n vacuum or pressure\n\n Codes and Standards\n This product is recommended for\n installations covered by but not lim-\n ited to NFPA 37, NFPA 85, NFPA 86,\n ANSI Z83.4/CSA 3.7, ANSI Z83.18/ Description Application\n CSA 4.9, ANSI Z21.13, CSD-1, AA-A2… differential pressure switches Differential pressure monitoring in firing,\n UL 795, CSA B149.1, CSA B149.3 are field adjustable, compact pressure ventilation and air-conditioning systems.\n and CSA B149.6. switches for automatic burner controls. The AA-A2… can be used as a pressure,\n Available with hose or NPT threaded vacuum or differential pressure switch\n DUNGS is an ISO 9001 connections. for air and non-aggressive gases. Not\n manufacturing facility. suitable for natural gas, propane, butane\n AA-A2-4… differential pressure switch- and other combustable gases.\n es are suitable for making and/or\n breaking a circuit when the medium\n\n\n\n\n AA-A2 Sales Brochure • P/N 226358 • Ed. 10/23\n pressure changes relative to the set\n point. AA-A2-4… versions feature hose\n connections.\n\n AA-A2-6… differential pressure switch-\n es are suitable for making and/or\n breaking a circuit when the medium\n pressure changes relative to the set\n point. AA-A2-6… versions feature NPT\n threaded connections that also include\n1…4 a test button in the lower housing.\n\fAA-A2… SPDT differential pressure switch in pressure and vacuum ranges.The differential pressure acts via the diaphragm\nagainst the force of the setting spring on the microswitch. The pressure switch operates without any auxiliary power\n\nSpecifications\nMax. operating pressure 7 PSI (500 mbar)\nPressure connection AA-A2-4 AA-A2-6\n Hose connection Threaded connection\n 5/32\" (4.6 mm) dia. positive\t\t 1/4\" NPT positive\n 5/32\" (4.6 mm) dia. negative\t\t 1/8\" NPT negative\n \t\t\t\t\t\t 5/32\" (Ø 4.6 mm) test connection\nTemperature range Ambient temperature\t\t\t -40 °F to +140 °F (-40 °C to +60 °C)\n Medium temperature\t\t\t -40 °F to +140 °F (-40 °C to +60 °C)\nMaterials Housing:\t\t\t\t Polycarbonate\n Switch: \t\t\t\t\t Polycarbonate\n Diaphragm: \t\t\t\t NBR-based rubber\n Switching contact:\t\t\t Silver (Ag)\nElectrical ratings AC eff. \t\t\t\t\t min. 24 V max. 250 V\n DC\t\t\t\t\t min. 24 V max. 48 V\nCurrent ratings AC 5A resistive @ 120 VAC\t\t\t\n AC 3A inductive @ 120 VAC \t\t\t\n DC min. 20 mA @ 24 VDC\t\t\n DC max. 1A @ 24 VDC\t\t\t\nElectrical connection Screw terminals via 1/2\" NPT conduit connection\nEnclosure rating NEMA Type 4\nSetting tolerance ±15% switching point deviation referred to set point, adjusted as pressure rises,\n vertical diaphragm position\nInstallation position Multipoised\n\n\n\n\n Installation position: Standard installation position is vertical upright diaphragm. When installed horizontally, the\n pressure switch switches at a pressure higher by approx. 0.2 in. W.C. When installed upside down, the pressure\nswitch switches at a pressure lower by approx. 0.2 in. W.C. When installed in other positions, the pressure switch switches\nat pressure deviating from the set reference value by max. ± 0.2 in. W.C.\n\n\nDefinition of switching hysteresis ∆p AA-A2… switching function\nThe pressure difference between the upper and lower switching pressures. As pressure rises:\n 1 NC opens, 2 NO closes\n As pressure falls:\n 2 NO opens, 1 NC closes\nPressure\nat meter Setpoint tolerance\n Upper switching\n\n\n\n\n Switching hysteresis Δp\n pressure\n\n\n Falling\n\n\n Adjustment as\n Rising Lower switching\n pressure rises pressure\n Medium Pressure\n\n 2…4\n\f Dimensions inch (mm) AA-A2-4… Hose connection\n 1 Pressure connection (+)\n 2 Pressure connection (–)\n\n\n\n\n Dimensions inch (mm) AA-A2-6… Threaded connection\n 1 Pressure connection (+)\n 2 Pressure connection (–)\n 3 Test nipple p(+)\n\n\n\n\n Pressure connection can only be used as test nipple.\n\n\n\n\n (3) Test Nipple\n Test Button\n\n\n\n\n O 3,1\n LK .8)\n (78\n\n\n\n\n 3.7 (94)\n\n\n\n\n 1/2” NPT\n\n\n\n Test button interrupted and the pressure below the If the test button is released, the pres-\n The AA-A2-6… threaded version is diaphragm is relieved.The microswitch of sure below the diaphragm is built up\n equipped with a test button. When the the pressure switch changes the contact again and the microswitch changes to\n test button is pressed, the connection position from NO to NC. its original position.\n3 … 4 to the 1/4\" NPT pressure connection is\n\f Differential Pressure Switch\n for air, flue and exhaust gases\n\n AA-A2…\n\n\n\n\nType Version Connection Order No. Setting range Switching Factory\n Type in. W.C. hysteresis Calibration\n P ↑min. P ↑max.\nAA-A2-4-… AA-A2-4-2 Hose 266910 0.16 - 1.20 ≤ 0.12 ≤ 0.12\npressure switch AA-A2-4-3 Hose 266911 0.40 - 4.00 ≤ 0.20 ≤ 0.20\n…