RM7890B1030 Honeywell On-Off Primary Control w/ Shutter Drive Capability, 4 or 10 sec Fixed Pilot

Overview: Microprocessor-based integrated primary burner control for automatically fired gas, oil or combination fuel single burner applications. Provides level of safety, functional capability and features beyond conventional controls.

Features:

• Includes Shutter Drive Capability, Alarm sounds when Reset pushed.
• Functions include automatic burner sequencing, flame supervision, system status indication, system or self diagnostics and troubleshooting.
• Subbase and amplifier are required for operation.
• Options include PC interface, keyboard display module, DATA CONTROLBUS™ MODULE, remote display module, first-out expanded annunciator, and COMBUSTION SYSTEM MANAGER™ software.
• Five LEDs provide sequence information.
• Interchangeable plug-in flame amplifiers.
• Optional local or remote annunciation of operation and fault information.
• Nonvolatile memory retains history files and sequencing status after power loss.
• Optional remote reset capability.
• Optional report generation.
• Selectable relight or lockout on loss of flame.
• Flame Establishing Period - Pilot: Fixed 4 sec or 10 sec PFEP
• Flame Establishing Period - Main: Intermittent

Here's the optimized description for the RM7890B1030:

Suggested Description

The Honeywell RM7890B1030 is a microprocessor-based on-off primary burner control for automatically fired gas, oil, coal, or combination fuel single burner applications. It is the shutter drive variant of the 7800 Series RM7890B family, adding built-in shutter drive capability and an audible alarm on reset — two features not present on the base RM7890A models. This unit is discontinued by Honeywell (discontinued April 8, 2022) — new old-stock units are available here for maintenance and replacement use.

As a full primary burner control, the RM7890B1030 handles automatic burner sequencing, flame supervision, safe-start checks, safety lockout, and load switching — making it the complete control center of a flame safeguard system. A compatible wiring subbase and flame signal amplifier are required; the display module is sold separately.

Key Features

• Shutter drive capability — built-in output to operate UV scanner shutters; requires 220-240V to 120VAC 10VA minimum stepdown transformer for shutter drive
• Audible alarm on reset — alarm sounds when the Reset button is pushed, a distinguishing feature of the B-series vs A-series models
• Fixed 4-second or 10-second PFEP — pilot flame establishing period is fixed (not jumper-configurable in the field the same way as selectable models)
• Intermittent pilot — pilot established at startup and extinguished once main flame is proven
• Intermittent main flame establishing period
• Selectable relight or lockout on loss of flame — configurable behavior via site jumper
• Five status LEDs — real-time sequence indication for Power, Pilot, Flame, Main, and Alarm
• Interchangeable plug-in flame amplifiers — supports UV, IR, and rectification detection
• Nonvolatile memory — retains history files and lockout status through power loss
• Lockout and running interlocks
• Optional remote reset capability
• Supports gas, oil, coal, or combination fuel applications

Specifications

Required & Compatible Components

• Wiring Subbase: Q7800A or Q7800B Universal Wiring Subbase (required)
• Flame Signal Amplifier: R7847, R7848, R7849, R7851, R7852, R7861, or R7886 (required)
• Shutter transformer: 220-240V to 120VAC, 10VA minimum (required if using shutter drive)
• Display (optional): S7800A1142 Keyboard Display Module — enables programmable postpurge and fault history
• Optional add-ons: PC interface, Data ControlBus™ Module, remote display module, first-out expanded annunciator, Combustion System Manager™ software

How the RM7890B1030 Differs from Related Models

The RM7890 family spans several variants — here's how the B1030 fits in:

• vs. RM7890A1015 — the A1015 has no shutter drive output and no audible alarm on reset; the B1030 adds both
• vs. RM7890B1014 — the B1014 has a shutter terminal available but no active shutter drive output; the B1030 includes a full shutter drive
• vs. RM7890B1048 — the B1048 is the current active replacement for applications requiring shutter drive output; the B1030 is discontinued
• vs. RM7890A1056 — similar to the A1015 but with fixed PFEP; neither has shutter drive

Common Applications

The RM7890B1030 is used in commercial boilers, industrial heating equipment, process burners, and combustion systems where a UV scanner with a motorized shutter is installed — typically in applications where shutter-equipped C7027, C7035, or similar Honeywell UV detectors are used. It is suited to single-burner systems requiring automatic startup, proven pilot, and safety lockout with shutter operation integrated into the control sequence.

Important Notes

• This product is discontinued by Honeywell — units available are new old-stock; no factory reorders are possible
• Subbase and amplifier are required and are not included
• The Keyboard Display Module is not included — order S7800A1142 separately if programmable postpurge or on-board fault history is needed
• Not weather-tight — must be protected by an approved enclosure when installed outdoors