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      EC7850A1072

      Burner Control Module
      In Stock
      Ships by Sunday, October 18
      Fast Shipping Available

      Product Describe：

      Honeywell EC7850A1072 is a 220-240 Vac 7800 SERIES burner-control relay for full-modulation gas, oil or combination-fuel installations. It executes the approved burner sequence, supervises the selected flame-sensing chain and retains operating and lockout history.

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      Technical specifications Information Technical notes FAQ

      Technical specifications for EC7850A1072

      Technical specifications for EC7850A1072

      • Manufacturer:
        Honeywell
      • Product Category:
        General Automation
      • Spare Part Number:
        EC7850A1072
      • Estimated shipping dimensions:
        12.1x12.5x11.2cm
      • Weight:
        0.92 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Product Type:
        Burner control relay module
      • Product Family:
        7800 SERIES
      • Supply Voltage:
        220-240 Vac, +10/-15%
      • Frequency:
        50/60 Hz
      • Postpurge:
        2 seconds
      • Required Architecture:
        Q7800 subbase, approved flame amplifier and ST7800A purge timer
      View as PDF Ask for Quote

      Information

      Information

      Overview Manuals Common Applications Product Precautions
      Inside an approved 7800 SERIES burner circuit, Honeywell EC7850A1072 coordinates permissives, purge, ignition and flame proving while retaining sequence history for maintenance review.
      • Runs the programmed burner start-up and shutdown order
      • Supervises flame through the selected amplifier and detector
      • Reports sequence position and lockout state at the front panel
      • Retains operating history across a power interruption

      The A1072 execution contributes a two-second postpurge and supports the documented LHL-LF and HF proven functions. External subbase, timer and flame-sensing choices remain part of the burner design rather than properties supplied by the relay module alone.

      Commissioning should prove each permissive transition in order, observe ignition timing and verify that loss-of-flame and lockout responses match the approved cause-and-effect record.

      Important Notice: Check the selected pilot flame-establishing period and purge-timer setting against the burner sequence before the module is returned to automatic operation.

      Honeywell EC7850A1072 Manuals & Downloads
      EC7850A1072 Technical Reference (PDF)EC7850A1072 Installation & Commissioning Guide (PDF)

      Important Notice: The Technical Reference identifies the A1072 electrical and sequence characteristics; the Installation & Commissioning Guide separates wiring, timing and burner-safety checks into a controlled workflow.

      Modulating gas burnerSequence and supervise a full-modulation gas burner using the approved external subbase, amplifier, purge timer and detector.
      Modulating oil burnerApply the documented sequence and flame-proving functions to an approved oil-burner control design.
      Combination-fuel burnerUse the module in an approved gas/oil arrangement with the correct interlocks and flame-detection hardware.
      Burner diagnosticsRead the five sequence LEDs and retained lockout history during controlled maintenance and acceptance testing.
      Confirm the complete EC7850A1072 identity, approved 7800 SERIES subbase, amplifier, purge timer, detector and burner sequence before energization or replacement.
      1Record the complete EC7850A1072 marking before disconnecting conductors.
      2Isolate burner fuel and electrical energy under the approved safe-work procedure.
      3Verify the 220-240 Vac supply and frequency before energization.
      4Confirm the Q7800 subbase wiring against the approved burner diagram.
      5Match the flame amplifier and detector to the approved flame-sensing method.
      6Confirm the ST7800A purge-timer selection and required purge duration.
      7Test permissives, ignition, flame proving, shutdown and lockout functions.
      8Record the as-left sequence, LED states and acceptance results before release.

      Technical notes

      Technical notes

      Confirm the complete EC7850A1072 identity, approved Q7800 subbase, flame amplifier, purge timer, detector and burner sequence. Verify the 220-240 Vac supply, test permissives, ignition, flame proving, shutdown and lockout, and record the as-left acceptance results.

      FAQS

      • What is Honeywell EC7850A1072?
        EC7850A1072 is a Honeywell 7800 SERIES microprocessor-based relay module for full-modulation single-burner gas, oil or combination-fuel applications.
      • Which supply rating applies to EC7850A1072?
        The exact EC7850A1072 execution is specified for 220-240 Vac, +10/-15%, at 50/60 Hz.
      • What postpurge period is specified?
        The documented postpurge period is 2 seconds.
      • Which external components are required?
        Use the approved Q7800A or Q7800B subbase, an approved R7847, R7849, R7861 or R7886 flame amplifier, the selected detector and an ST7800A purge timer.
      • How is the prepurge interval established?
        The prepurge interval is determined by the installed ST7800A purge timer selected for the application.
      • What happens to diagnostic information after power interruption?
        Nonvolatile memory retains operating history and lockout information through power interruptions.
      • Which pilot flame establishing periods are supported?
        The control supports selectable 3-second or 5-second pilot flame establishing periods according to the approved burner sequence.
      Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
      Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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