{"product_id":"mcdonnell-miller-fpc-1000-u-control","title":"McDonnell \u0026 Miller FPC-1000-U Control","description":"\u003cp\u003eThe \u003cstrong\u003eMcDonnell \u0026amp; Miller FPC-1000-U\u003c\/strong\u003e (MPN 144706) is a universal, field-configurable \u003cstrong\u003eelectronic low water cut-off (LWCO)\u003c\/strong\u003e designed to replace nearly all probe-type controls in the field, including the \u003cstrong\u003ePSE-802-U-24\u003c\/strong\u003e and \u003cstrong\u003e752P-MT-U-24\u003c\/strong\u003e. This \u003cstrong\u003eBoilerwize\u003c\/strong\u003e series control is engineered for both steam and hot water applications, featuring an \u003cstrong\u003eextended barrel probe\u003c\/strong\u003e with a 3\/4\" NPT connection for deeper tapping penetration. Its patented conductivity-based sensing technology distinguishes between actual low water conditions and water volatility, significantly reducing \u003cstrong\u003enuisance shutdowns\u003c\/strong\u003e while providing \u003cstrong\u003edry fire protection\u003c\/strong\u003e. The unit is power-flexible, allowing for \u003cstrong\u003e24V or 120V\u003c\/strong\u003e operation, and can be configured for \u003cstrong\u003eautomatic or manual reset\u003c\/strong\u003e to meet ASME CSD-1 requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Superiority for Contractors:\u003c\/strong\u003e This control consolidates 19 legacy models into one SKU, simplifying truck stock. It features a \u003cstrong\u003eself-cleaning probe\u003c\/strong\u003e designed to minimize scale buildup, extending maintenance intervals to five years. The integrated \u003cstrong\u003etri-function button\u003c\/strong\u003e allows for a push-to-test diagnostic without draining the boiler, ensuring the burner circuit interrupts as intended. With \u003cstrong\u003ebrass-threaded metal-to-metal seals\u003c\/strong\u003e and high-visibility \u003cstrong\u003emulti-function LEDs\u003c\/strong\u003e (Green for Auto, Yellow for Manual, Red for Low Water), the FPC-1000-U provides clear status indication and a leak-free mechanical installation for residential or commercial hydronic systems.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits for the Jobsite\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUniversal Field Configuration:\u003c\/strong\u003e One control handles \u003cstrong\u003e24V\/120V\u003c\/strong\u003e systems and \u003cstrong\u003eauto\/manual reset\u003c\/strong\u003e, acting as a direct cross for the \u003cstrong\u003eMcDonnell \u0026amp; Miller PSE-800\u003c\/strong\u003e and \u003cstrong\u003e750 series\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePatented Self-Cleaning Probe:\u003c\/strong\u003e Proprietary technology reduces mineral encrustation on the electrode, ensuring consistent conductivity readings and reducing the need for annual probe pulling.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Testing Without Draining:\u003c\/strong\u003e The \u003cstrong\u003etri-function test button\u003c\/strong\u003e verifies burner circuit operation and safety logic without requiring a physical water level drop.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRobust Environmental Ratings:\u003c\/strong\u003e Supports maximum water pressures up to \u003cstrong\u003e160 psi\u003c\/strong\u003e and steam pressures up to \u003cstrong\u003e15 psi\u003c\/strong\u003e, with a 250°F maximum water temperature rating.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStreamlined Installation:\u003c\/strong\u003e Features wrench flats and easy-access wiring knock-outs within a NEMA 1 enclosure to speed up replacement time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions \u0026amp; Contractor Tips\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan this replace a float-style LWCO?\u003c\/strong\u003e\u003cbr\u003e\nYes, the \u003cstrong\u003eFPC-1000-U\u003c\/strong\u003e can serve as a primary or secondary LWCO replacement for older float-style units, provided there is a suitable 3\/4\" NPT tapping available. It is often preferred for its lack of moving parts which can seize due to sediment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I switch between 24V and 120V?\u003c\/strong\u003e\u003cbr\u003e\nThe voltage is field-selectable via internal jumpers. Always verify your supply voltage before powering the unit to prevent damage to the PCB. Note that the \u003cstrong\u003eswitch rating\u003c\/strong\u003e is 7.5 FLA at 120 VAC.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does the blinking red LED mean?\u003c\/strong\u003e\u003cbr\u003e\nA solid red LED indicates a low water condition. If the LEDs are blinking alternately during startup, the unit is in default mode and requires configuration using the test button to lock in your system settings (Steam\/Water and Reset mode).\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: 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.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":35651222732,"sku":"FPC-1000-U","price":454.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_0770dbcf-c1b8-4e05-8ea0-63038eee6c3e.png?v=1769799994","url":"https:\/\/www.gsistore.com\/en-ca\/products\/mcdonnell-miller-fpc-1000-u-control","provider":"GSIstore","version":"1.0","type":"link"}