{"product_id":"honeywell-rm7890a1056-7800-series-burner-control","title":"Honeywell RM7890A1056 7800 Series Burner Control","description":"\u003cp\u003eThe \u003cstrong\u003eRM7890A1056\u003c\/strong\u003e is a microprocessor-based 7800 Series primary burner control relay module manufactured by Honeywell for automatically fired gas, oil, coal, or combination fuel single-burner applications. Operating on 120 VAC, it provides automatically sequenced burner firing, flame supervision, system status indication, and self-diagnostics for on-off primary burner control. This unit supports intermittent pilot operation, programmable Valve Proving System (VPS) sequences, and selectable pilot flame establishing periods.\u003c\/p\u003e\n\u003ch3\u003eSequence Logic and Flame Supervision Features\u003c\/h3\u003e\n\u003cp\u003eThe relay module sequences burner start-up through pre-ignition, pilot ignition, main flame execution, and post-purge stages. Field technicians can configure trial-for-ignition parameters to suit specific burner hardware and fuel requirements:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePilot Flame Establishing Period:\u003c\/strong\u003e Field-selectable for either a 4-second or 10-second trial for ignition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Configured for intermittent pilot operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety \u0026amp; Monitoring:\u003c\/strong\u003e Integrates a pre-ignition sequence and supports an optional programmable Valve Proving System (VPS) to verify fuel valve closure integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOperating Voltage and Mechanical Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe unit operates on 120 VAC (+10\/-15%) at 50 Hz or 60 Hz power lines. It mounts directly onto a standard 7800 Series subbase, forming a modular assembly with plugged-in flame signal amplifiers and purge timer cards. The complete module weighs 3.00 lbs and functions in ambient operating temperatures ranging from -40 deg C to +60 deg C (-40 deg F to +140 deg F).\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\u003eRM7890A1056\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\u003eBurner Control Relay Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e7800 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Action\u003c\/td\u003e\n\u003ctd\u003eOn-Off Primary Burner Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\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\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Fuels\u003c\/td\u003e\n\u003ctd\u003eGas, Oil, Coal, or Combination Fuel (Single-Burner)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Type\u003c\/td\u003e\n\u003ctd\u003eIntermittent Pilot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePilot Flame Establishing Period\u003c\/td\u003e\n\u003ctd\u003e4 sec or 10 sec (Selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePre-Ignition\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Proving System (VPS)\u003c\/td\u003e\n\u003ctd\u003eProgrammable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +60 deg C (-40 deg F to +140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Weight\u003c\/td\u003e\n\u003ctd\u003e3.00 lbs\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 power input is required to operate the Honeywell RM7890A1056 relay module?\u003c\/p\u003e\n\u003cp\u003eA: The module requires 120 VAC (+10\/-15%) line voltage at 50 Hz or 60 Hz.\u003c\/p\u003e\n\u003cp\u003eQ: What pilot flame establishing periods can be configured on the RM7890A1056?\u003c\/p\u003e\n\u003cp\u003eA: The module supports field configuration for either a 4-second or 10-second pilot flame establishing period.\u003c\/p\u003e\n\u003cp\u003eQ: Can the RM7890A1056 be used with combination gas\/oil burners?\u003c\/p\u003e\n\u003cp\u003eA: Yes, it is rated for automatically fired single-burner applications using gas, oil, coal, or combination fuels.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":68048195289384,"sku":"RM7890A1056","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/RM7890A1056_Cocoai.png?v=1793349763","url":"https:\/\/www.powerdcs.com\/ar\/products\/honeywell-rm7890a1056-7800-series-burner-control","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}