{"product_id":"honeywell-l8148e1216-aquastat-relay-boiler-control-ships-fast","title":"Honeywell L8148E1216 Aquastat Relay Boiler Control for Hydronic Heating Systems","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThe L8148E1216 is an immersion-type high-limit aquastat relay that provides essential boiler safety by monitoring water temperature and controlling burner and circulator circuits. It operates on 120VAC and is designed for precise and reliable temperature regulation in hydronic heating systems.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"height: 324.888px; width: 100%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.2875px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 20.2875px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 20.2875px;\"\u003eControls \u0026amp; Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eL8148E1216\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eTemperature\/Process Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eAquastat Relay Boiler Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eHigh-limit boiler temperature control with relay switching\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eForced hydronic heating systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003e120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 39.1875px;\"\u003e\u003cstrong\u003eThermostat Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 39.1875px;\"\u003e24 VAC thermostat, 0.2 A anticipator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003e140–240°F (model dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eMaximum Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003e255 psi immersion well\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.2875px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 20.2875px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 20.2875px;\"\u003eHorizontal or vertical immersion well\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 19.5938px;\"\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 19.5938px;\"\u003eUL Listed, CSA Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 31.25%; height: 10px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 68.5307%; height: 10px;\"\u003e3.65 lb (1.66 kg) \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003cspan style=\"font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eL8148E1216\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe L8148E1216, now discontinued by the manufacturer, is part of Honeywell's L8148E series of immersion-type relay controllers. It is designed for integration with forced hydronic systems and works with a 24VAC thermostat (with 0.2A heat anticipator). The relay includes high-limit protection that shuts off the burner when water temperature exceeds setpoint, while allowing the circulator to keep running if a thermostat call persists. The unit shares common features with related models in the series, such as options for remote low-limit control and a specific plug for vent damper systems. Rated for industrial-grade use, it can be mounted either horizontally or vertically and supports installation with well adapters and heat-conductive compounds. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImmersion-Type Controller: Fits into boiler-compatible immersion well for accurate temperature sensing.\u003c\/li\u003e\n\u003cli\u003eHigh-Limit Protection: Automatically interrupts burner circuit when water exceeds set threshold; circulator continues if thermostat remains active.\u003c\/li\u003e\n\u003cli\u003eThermostat Compatibility: Designed to work with 24VAC thermostats using a 0.2A heat anticipator.\u003c\/li\u003e\n\u003cli\u003eRemote Input Terminal: Includes provision for low-limit sensor or zone valve wiring.\u003c\/li\u003e\n\u003cli\u003eVent Damper Plug Option: E-model supports plug-in to Honeywell vent dampers.\u003c\/li\u003e\n\u003cli\u003eFlexible Mounting: Supports both horizontal and vertical orientation; includes well adapters.\u003c\/li\u003e\n\u003cli\u003eRobust Construction: Rated for up to 255 psi pressure and ambient temperatures up to 150 °F depending on load.\u003c\/li\u003e\n\u003cli\u003eDiscontinued Model: No longer produced, with surplus items still on the market under warranty.\u003c\/li\u003e\n\u003cli\u003eThermostat Heat Anticipator: Factory set at 0.2A to optimize accuracy.\u003c\/li\u003e\n\u003cli\u003eTemperature Scale Range: Typically between 140–240 °F with a fixed differential.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe L8148E1216 delivers reliable and customized temperature control necessary for safe hydronic heating operations.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":50421755216170,"sku":"L8148E1216","price":714.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_5e53b087-32ab-49c7-86cc-df397e77444c.webp?v=1753691761","url":"https:\/\/iqelectro.com\/products\/honeywell-l8148e1216-aquastat-relay-boiler-control-ships-fast","provider":"IQElectro","version":"1.0","type":"link"}