{"product_id":"weil-mclain-511-624-520","title":"Weil McLain 511-624-520 Pressure Switch","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-624-520 Air Pressure Switch\u003c\/strong\u003e is the \u003cstrong\u003e1.4 in. W.C. SPST\u003c\/strong\u003e \u003cstrong\u003eblower\u003c\/strong\u003e proving switch for the \u003cstrong\u003e0 to 5,500 ft elevation\u003c\/strong\u003e range on the \u003cstrong\u003eWeil-McLain GV\u003c\/strong\u003e gas boiler. The \u003cstrong\u003eGV Series 1 and 2\u003c\/strong\u003e parts list (Fig. 5) describes it as a \"Pressure Switch (\u003cstrong\u003e0 to 5,500 ft\u003c\/strong\u003e. Elevation) 1.4\" W.C.\" with a \u003cstrong\u003eHoneywell IS20292-5426\u003c\/strong\u003e reference, and the \u003cstrong\u003eGV Series 3\u003c\/strong\u003e (Fig. 3\/4) and \u003cstrong\u003eGV Series 4\u003c\/strong\u003e (Fig. 3) parts lists show it as an \"\u003cstrong\u003eAir Pressure Switch\u003c\/strong\u003e (0-5500' Elevation)\" with a \u003cstrong\u003eTridelta FS6330-527\u003c\/strong\u003e reference. The switch has \u003cstrong\u003edual 1\/4 in. barb connections\u003c\/strong\u003e and comes with an \u003cstrong\u003eL-shaped bracket\u003c\/strong\u003e, and the beige and gray body is molded \u003cstrong\u003eORIGINAL USA\u003c\/strong\u003e with a \u003cstrong\u003eP2\u003c\/strong\u003e marking.\u003c\/p\u003e\n\n\u003cp\u003eAn \u003cstrong\u003eair pressure switch\u003c\/strong\u003e is a safety proving device. The \u003cstrong\u003eblower\u003c\/strong\u003e creates a pressure differential, and when that pressure reaches the \u003cstrong\u003e1.4 in. W.C.\u003c\/strong\u003e set point the \u003cstrong\u003esingle-pole, single-throw (SPST)\u003c\/strong\u003e contacts close and tell the \u003cstrong\u003econtrol module\u003c\/strong\u003e that airflow is established. If the switch does not close, the boiler will not fire. If the vent or air intake is blocked, the pressure drops and the switch opens, which shuts the burner down. It is a safety control, so it should be replaced with the correct number and never bypassed or jumpered.\u003c\/p\u003e\n\n\u003cp\u003eElevation matters with this part. The \u003cstrong\u003e511-624-520\u003c\/strong\u003e is the \u003cstrong\u003e0 to 5,500 ft\u003c\/strong\u003e switch, and the \u003cstrong\u003eGV Series 1 and 2\u003c\/strong\u003e parts list shows a separate kit, \u003cstrong\u003e382-200-317\u003c\/strong\u003e, for \u003cstrong\u003e5,500 to 10,000 ft\u003c\/strong\u003e, so confirm your installation altitude before you order. If a GV boiler locks out on a \u003cstrong\u003epressure switch\u003c\/strong\u003e fault, check the \u003cstrong\u003eblower\u003c\/strong\u003e wheel, the vent and air intake, and the \u003cstrong\u003esense line\u003c\/strong\u003e for cracks, water or a pinched section before you replace the switch. Condensate in the \u003cstrong\u003esense line\u003c\/strong\u003e is a common false fault. Once the lines are clear, a switch that still will not close at the correct pressure is ready for replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1.4 In. W.C. Set Point:\u003c\/strong\u003e The set point shown on the \u003cstrong\u003eWeil-McLain GV\u003c\/strong\u003e Series 1 and 2 parts list for the \u003cstrong\u003e0 to 5,500 ft\u003c\/strong\u003e switch.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eListed Across GV Series 1 to 4:\u003c\/strong\u003e Shown on the \u003cstrong\u003eGV Series 1 and 2\u003c\/strong\u003e, \u003cstrong\u003eGV Series 3\u003c\/strong\u003e and \u003cstrong\u003eGV Series 4\u003c\/strong\u003e parts lists.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual Barb Connections and Bracket:\u003c\/strong\u003e \u003cstrong\u003eDual 1\/4 in. barb\u003c\/strong\u003e ports and an \u003cstrong\u003eL-shaped bracket\u003c\/strong\u003e come with the switch, ready to mount at the \u003cstrong\u003eblower\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSPST Safety Contacts:\u003c\/strong\u003e \u003cstrong\u003eSPST\u003c\/strong\u003e contacts prove \u003cstrong\u003eblower\u003c\/strong\u003e airflow to the \u003cstrong\u003econtrol module\u003c\/strong\u003e before the boiler is allowed to fire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat elevation is the 511-624-520 for?\u003c\/strong\u003e \u003cstrong\u003e0 to 5,500 ft\u003c\/strong\u003e. For \u003cstrong\u003e5,500 to 10,000 ft\u003c\/strong\u003e the \u003cstrong\u003eGV Series 1 and 2\u003c\/strong\u003e parts list shows the \u003cstrong\u003e382-200-317\u003c\/strong\u003e kit.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhich GV boilers list this switch?\u003c\/strong\u003e The \u003cstrong\u003eWeil-McLain GV\u003c\/strong\u003e Series 1 and 2, \u003cstrong\u003eGV Series 3\u003c\/strong\u003e and \u003cstrong\u003eGV Series 4\u003c\/strong\u003e parts lists.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCan I bypass the switch to test the boiler?\u003c\/strong\u003e No. It is a safety proving control. Check the \u003cstrong\u003eblower\u003c\/strong\u003e, vent, air intake and \u003cstrong\u003esense line\u003c\/strong\u003e, then replace the switch if it still will not close.\u003c\/li\u003e\n\u003c\/ul\u003e\n\nDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":68025748390066,"sku":"511-624-520","price":129.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/511-624-520.jpg?v=1794598565","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-511-624-520","provider":"GSIstore","version":"1.0","type":"link"}