RM7895D1011 | Honeywell On-Off Primary Control With Prepurge

Honeywell · HVAC & Building Controls

Description  The Honeywell RM7895D1011 is a microprocessor-based relay module used for primary burner control in single-burner gas, oil, or combination-fuel systems. It supports interrupted pilot operation with programmable purge timing and dynamic airflow check functionality.     Technical Specifications  Condition New/Never Used Surplus Brand Honeywell Category HVAC Part Number RM7895D1011 Subcategory Burner Control Series 7800 Series Product Type Relay Module Application Type Single-burner gas/oil/combination fuel Ignition Type Interrupted Pilot Pilot Flame Establishing Period Selectable: 4 or 10 seconds Main Flame Establishing Period 10 seconds Voltage Supply 120 VAC Frequency 50/60 Hz Pre-Ignition Purge Programmable Airflow Check Dynamic airflow switch verification LED Indicators 5 sequence status LEDs Display Compatibility S7800 Keyboard Display Module (optional) Optional Interfaces Modbus, Remote Annunciator, First-Out Indicators Contact Configuration Requires external amplifier and subbase Weight 2.30 lbs       Information About RM7895D1011 The RM7895D1011 is a 7800 Series relay module from Honeywell, developed for managing the on-off firing sequence of industrial or commercial burners using gas, oil, or mixed fuels. It integrates programmable pre-purge cycles, a selectable 4- or 10-second pilot flame establishing period, and a fixed 10-second main flame trial. Operating on 120 VAC at 50/60 Hz, the controller includes features such as dynamic airflow switch check, selectable relight or lockout on flame loss, and history retention via non-volatile memory. The unit requires a separate subbase, amplifier, and prepurge timer for complete system integration and is compatible with Honeywell’s S7800 display and annunciator modules for extended diagnostics and monitoring. Key Features: Automatic Burner Control: Manages sequencing, flame supervision, purge timing, and diagnostics. Interrupted Pilot Operation: Supports timed pilot ignition with a switch to main flame. Flame Failure Response Time: Configurable to 4 or 10 seconds for pilot; 10 seconds for main. Dynamic Airflow Check: Verifies combustion airflow conditions prior to ignition. Selectable Lockout Behavior: User can set relight or lockout upon flame loss. Status LEDs: Five onboard LEDs provide real-time sequence status indication. Plug-In Amplifier Support: Compatible with interchangeable flame amplifier modules. Optional S7800 Display: Allows local or remote annunciation of faults and operating status. Non-Volatile Memory: Maintains event logs and lockout state after power loss. Modular Design: Subbase, amplifier, and prepurge timer required for full operation. The RM7895D1011 delivers advanced, modular, and configurable control for safe and efficient single-burner applications.

Brand: Honeywell · Category: HVAC & Building Controls

Key features

• Automatic Burner Control: Manages sequencing, flame supervision, purge timing, and diagnostics.
• Interrupted Pilot Operation: Supports timed pilot ignition with a switch to main flame.
• Flame Failure Response Time: Configurable to 4 or 10 seconds for pilot; 10 seconds for main.
• Dynamic Airflow Check: Verifies combustion airflow conditions prior to ignition.
• Selectable Lockout Behavior: User can set relight or lockout upon flame loss.
• Status LEDs: Five onboard LEDs provide real-time sequence status indication.
• Plug-In Amplifier Support: Compatible with interchangeable flame amplifier modules.
• Optional S7800 Display: Allows local or remote annunciation of faults and operating status.
• Non-Volatile Memory: Maintains event logs and lockout state after power loss.
• Modular Design: Subbase, amplifier, and prepurge timer required for full operation.

Specifications

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