{"product_id":"honeywell-rm7850a1019-u-burner-programming-control","title":"Honeywell RM7850A1019\/U Burner Programming Control","description":"\u003cp\u003eThe \u003cstrong\u003eRM7850A1019\/U\u003c\/strong\u003e is an advanced burner programming control engineered to manage commercial and industrial burner-boiler operations. Built to meet European Community timings (LHL, high\/low fire proving), it incorporates five diagnostic LEDs, a run\/test switch, and nonvolatile memory to retain history and lockout status during power loss.\u003c\/p\u003e\n\u003ch3\u003eSystem Architecture and Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe control operates on 120 Vac (-15%, +10%) at 50 or 60 Hz and interfaces with compatible Honeywell flame detectors, plug-in amplifiers (such as R7847, R7849, R7861, or R7886), and ST7800A purge timer cards. It requires a Q7800A or Q7800B universal wiring subbase and supports local or optional remote annunciation alongside external voltage check access points.\u003c\/p\u003e\n\u003ch3\u003eSafety and Operational Timings\u003c\/h3\u003e\n\u003cp\u003eFeaturing a 3 or 5 second pilot and main flame establishing period with a 15-second postpurge, the unit executes programmed preignition, airflow checks, and intermittent second-stage pilot valve operation. Prepurge intervals are determined by the inserted ST7800A timer card, while system interlocks trigger secure lockouts under fault conditions.\u003c\/p\u003e\n\u003ch3\u003eTechnical Parameters\u003c\/h3\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\u003eRM7850A1019\/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\u003eBurner Programming Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eProgramming 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; 60 Hz (plus\/minus 10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame Establishing Period - Pilot\u003c\/td\u003e\n\u003ctd\u003e3 sec or 5 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame Establishing Period - Main\u003c\/td\u003e\n\u003ctd\u003e3 sec, 5 sec, or Intermittent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePostPurge\u003c\/td\u003e\n\u003ctd\u003e15 sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired Components\u003c\/td\u003e\n\u003ctd\u003eQ7800A, B Subbases; R7847, R7849, R7861, R7886 Amplifiers; ST7800A Purge Timer Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with Q7800A Subbase)\u003c\/td\u003e\n\u003ctd\u003e127 x 127 x 133 mm (5 x 5 x 5 1\/4 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with Q7800B Subbase)\u003c\/td\u003e\n\u003ctd\u003e127 x 127 x 155 mm (5 x 5 x 6 3\/32 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.7 kg (1 lb 10 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping and Storage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +60 deg C (-40 to +140 deg F)\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 subbases are compatible with the Honeywell RM7850A1019\/U control?\u003c\/p\u003e\n\u003cp\u003eA: It requires either the Q7800A or Q7800B Universal Wiring Subbase for installation and wiring termination.\u003c\/p\u003e\n\u003cp\u003eQ: How is the prepurge time configured for this burner control?\u003c\/p\u003e\n\u003cp\u003eA: The prepurge interval is determined directly by the installed ST7800A plug-in purge timer card.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":68086428762408,"sku":"RM7850A1019\/U","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/RM7850A1019.png?v=1793698883","url":"https:\/\/www.powerdcs.com\/es\/products\/honeywell-rm7850a1019-u-burner-programming-control","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}