{"product_id":"rm7890a1015-honeywell-7800-series-primary-burner-control-relay-module-120-vac","title":"RM7890A1015 | Honeywell 7800 Series Primary Burner Control Relay Module 120 VAC","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Honeywell RM7890A1015 is a microprocessor-based primary burner control module designed for automatically fired gas, oil, or combination-fuel single-burner applications. Operating at 120 VAC, it manages burner sequencing, flame supervision, system diagnostics, and safety shutdowns, ensuring dependable and safe combustion control for industrial and commercial 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=\"width: 100%; height: 617.407px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; 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: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eHVAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eRM7890A1015\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eBurner Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e7800 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eMicroprocessor Relay Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eOn-Off Primary Burner Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e120 VAC (+10 %, –15 %), 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eFlame Establishing Period\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003e4 sec or 10 sec (pilot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eMain Flame\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eIntermittent main flame establishing period\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eTiming Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e4 s or 10 s selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eFlame Failure Response Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003e4 sec or 10 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003eAutomatic burner sequencing and flame supervision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eOn\/Off Primary; system and self diagnostics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eMemory Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eNonvolatile, retains history and lockout status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eLED Indicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e5 LEDs for power, sequence, and fault annunciation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eCompatible Devices\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e7800 Series subbase, amplifier, purge card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003ePanel or subbase-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eInterface Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003eModbus, Data ControlBus™, Keyboard Display Module, Remote Display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eAmbient Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003e–40 °F to +140 °F (–40 °C to +60 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 39.1875px;\"\u003e\u003cstrong\u003eDimensions (L × W × H)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 39.1875px;\"\u003e7-1\/4 in × 7 in × 5-7\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003e3.99 lb (1.81 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 10px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 10px;\"\u003e\u003cstrong\u003eApprovals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 10px;\"\u003eUL Listed, CE, CSA Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 30.4445%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.2429%; height: 19.5938px;\"\u003eDust-cover protected housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eRM7890A1015\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe RM7890A1015 belongs to Honeywell’s 7800 Series of relay modules, providing advanced burner management with integrated diagnostics and self-checking circuitry. It performs critical control functions such as pilot ignition, main flame monitoring, and fault annunciation. The control includes five LEDs for operational sequencing and a blinking fault LED for code indication. Designed for modularity, it requires a compatible subbase, amplifier, and purge card for operation, with optional components for data communication and remote monitoring. Nonvolatile memory retains operation history and lockout status after power loss, making it ideal for high-integrity flame safeguard systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntegrated Microprocessor Control: Provides full automatic burner sequencing, flame supervision, and status monitoring.\u003c\/li\u003e\n\u003cli\u003eLED Indicators: Five front LEDs display power, sequence status, and fault diagnostics through coded blink patterns.\u003c\/li\u003e\n\u003cli\u003eSelectable Flame Establishing Periods: Configurable 4- or 10-second pilot flame establishment to match burner characteristics.\u003c\/li\u003e\n\u003cli\u003eInterchangeable Plug-In Amplifiers: Supports a range of Honeywell flame detectors (ultraviolet, infrared, rectification).\u003c\/li\u003e\n\u003cli\u003eBuilt-In Self Diagnostics: Monitors system components and generates fault codes for troubleshooting and maintenance.\u003c\/li\u003e\n\u003cli\u003eNonvolatile Memory: Retains operational history and lockout information even after power interruption.\u003c\/li\u003e\n\u003cli\u003eOptional Communication Modules: Supports PC interface, Modbus communication, and remote annunciation via optional modules.\u003c\/li\u003e\n\u003cli\u003eSelectable Relight\/Lockout: Allows choice of automatic relight or lockout on flame loss for system flexibility.\u003c\/li\u003e\n\u003cli\u003eRemote Reset \u0026amp; Reporting: Enables optional remote reset capability and event logging for preventive maintenance.\u003c\/li\u003e\n\u003cli\u003eRugged Industrial Design: Dust-cover protected housing designed for harsh burner room environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe RM7890A1015 delivers the reliability, control, and safety diagnostics required for modern flame safeguard systems in industrial boilers and process burners.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105130848512,"sku":"RM7890A1015","price":1109.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/s-l1600_1dc683f0-9228-4d45-878a-360093f72660.webp?v=1785540949","url":"https:\/\/alotechparts.com\/products\/rm7890a1015-honeywell-7800-series-primary-burner-control-relay-module-120-vac","provider":"Alo Tech Solutions","version":"1.0","type":"link"}