{"product_id":"honeywell-rm7890b1014-u-on-off-primary-control","title":"Honeywell RM7890B1014\/U On-Off Primary Control","description":"\u003cp\u003eThe Honeywell \u003cstrong\u003eRM7890B1014\/U\u003c\/strong\u003e is a microprocessor-based integrated primary burner control designed for automatically fired gas, oil, or combination fuel single burner applications. It provides advanced flame supervision, automatic burner sequencing, and built-in self-diagnostics, incorporating nonvolatile memory to retain history files and sequencing status following power interruptions.\u003c\/p\u003e\n\u003ch3\u003eSystem Requirements and Operational Architecture\u003c\/h3\u003e\n\u003cp\u003eOperation of the controller requires a compatible Q7800A or Q7800B universal wiring subbase alongside an interchangeable plug-in flame signal amplifier, such as the R7847, R7848, R7849, R7851, R7852, R7861, or R7886 series. Five onboard LEDs provide immediate sequence status, while optional accessories support remote annunciation, PC interfacing, and keyboard display modules.\u003c\/p\u003e\n\u003ch3\u003eSafety and Configuration Features\u003c\/h3\u003e\n\u003cp\u003eThe unit supports selectable relight or lockout modes upon flame loss and includes built-in shutter drive capability for dynamic self-check applications. It is engineered to operate under standard 120 VAC line power across both 50 Hz and 60 Hz frequencies while maintaining compliance with major industrial safety and emissions approvals.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRM7890B1014\/U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOn-Off Primary Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120 VAC (+10, -15%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e50 Hz or 60 Hz (±10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with Q7800A Subbase)\u003c\/td\u003e\n\u003ctd\u003e5 in wide x 5 in high x 5.25 in deep (127 mm x 127 mm x 133 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with Q7800B Subbase)\u003c\/td\u003e\n\u003ctd\u003e5 in wide x 5 in high x 6.09 in deep (127 mm x 127 mm x 155 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1 lb 13 oz (0.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibration Tolerance\u003c\/td\u003e\n\u003ctd\u003e0.5 G environment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature Range\u003c\/td\u003e\n\u003ctd\u003e-40 deg F to +140 deg F (-40 deg C to +60 deg C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Subbases\u003c\/td\u003e\n\u003ctd\u003eQ7800A, Q7800B Universal Wiring Subbases\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Amplifiers\u003c\/td\u003e\n\u003ctd\u003eR7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprovals and Certifications\u003c\/td\u003e\n\u003ctd\u003eUL Component Recognized (File No. MP268), CSA Certified (File No. LR95329-3), FCC Part 15 Class B, Factory Mutual (Report No. OX4A5.AF), Swiss RE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What core components are required for the RM7890B1014\/U to function?\u003c\/p\u003e\n\u003cp\u003eA: The controller requires a Q7800A or Q7800B universal wiring subbase and a compatible Honeywell plug-in flame signal amplifier.\u003c\/p\u003e\n\u003cp\u003eQ: Can the unit be configured for either relight or lockout on flame failure?\u003c\/p\u003e\n\u003cp\u003eA: Yes, it features selectable relight or lockout behavior upon loss of flame during active burner operation.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":68170588258600,"sku":"RM7890B1014\/U","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/RM7885A1015_8e19e5d0-5b0c-40c4-a8c4-828b9e3142c1.png?v=1794475394","url":"https:\/\/www.powerdcs.com\/products\/honeywell-rm7890b1014-u-on-off-primary-control","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}