RM7838B1021 Honeywell Burner Control

Overview The Honeywell RM7838B1021 is a microprocessor-based semi-automatic ON/OFF programming burner control from the RM7800 / RM7838B line. It includes an integrated Valve Proving System (VPS) for additional safety verification. Designed for 120 VAC systems, it handles full burner sequencing, flame supervision, diagnostics, selectable timing, and a programmable postpurge. This module is built for industrial and commercial combustion systems where reliability, safety, and maintainable operation are essential. Features Semi-automatic ON/OFF burner control with Valve Proving System (VPS) Microprocessor-based logic with self-diagnostics and status reporting Five LED indicators showing sequence and fault states Non-volatile memory retaining fault history after power loss Selectable pilot flame establishing period: 4 seconds or 10 seconds Selectable main flame establishing period: 10 seconds or intermittent Early spark termination (5 seconds) Programmable postpurge time via on-board display module Supports interlocks, preignition checks, and fault lockout logic Modular and plug-in design for easier service and replacement Compatible with standard subbases, amplifiers, and purge cards Specifications Part Number RM7838B1021 Application Semi Automatic Programming Control w/VPS Dimensions (in.) 5 in. wide x 5 in. high x 5 1/4 in. deep with Q7800A Subbase x 6 3/32 in. deep with Q7800B Subbase Dimensions (mm) 127 mm wide x 127 mm high x 133 mm deep with Q7800A Subbase x 155 mm deep with Q7800B Subbase Weight (lb) 1 lb 10 oz Weight (kg) 7 kg Comments Includes programmable VPS (Valve Proving Switch) check feature and blinking LED fault annunciation Frequency 50 Hz; 60 Hz (±10%) Approvals, Underwriters Laboratories Inc. Component Recognized, File No. MP268; Guide No. MCCZ. Voltage 120 Vac ( 10, -15%) Shipping and Storage Temperature Range (F) -40 F to 140 F Shipping and Storage Temperature Range (C) -40 C to 60 C Approvals, Federal Communications Commission FCC Part 15, Class B, Emissions. Flame Establishing Period – Pilot 4 sec or 10 sec Flame Establishing Period – Main 10 sec or Intermittent Interlocks Lockout Preignition Yes PrePurge Determined by ST7800A Purge Timer Card PostPurge programmed with S7800A1142 display Early Spark Termination Yes, 5 sec Required Components Q7800A,B Universal Wiring Subbases. R7847, R7848, R7849, R7851, R7852, R7861, or R7886 Flame Signal Amplifier. ST7800A Plug-in Purge Timer Card. Pilot Type interrupted Vibration 5 G environment Approvals, Control Safety Devices Acceptable: CSD-1 Approvals, Swiss RE Acceptable Approvals, Factory Mutual Report No. OX4A5.AF. Applications The RM7838B1021 Honeywell Burner Control is suited for combustion systems that require enhanced safety via valve proving, along with standard burner control functions. Typical systems include: Industrial boilers and furnaces Packaged burner systems Gas, oil, or combination fuel single burners Systems requiring modular control and serviceability It ensures safe ignition sequencing, flame supervision, and automatic shutdown when faults are detected. Benefits Advanced safety with Valve Proving System (VPS) Modular plug-in design enables quick replacement Diagnostic LEDs and fault history simplify troubleshooting Flexible timing options support varied burner setups Built for industrial environments with robust reliability