Honeywell R4348A/1026 Flame Switch / Flame Monitoring Relay

The Honeywell R4348A/1026 is a Flame Switch / Flame Monitoring Relay designed for industrial burner applications. Here's a detailed description based on available information:

General Purpose:The R4348A series are primarily used as simple flame switches, providing an indication of the presence or absence of a flame in intermittent industrial oil/gas burner applications via an open or closed relay contact. They are often part of a larger burner management system.

Key Features and Specifications (specific to R4348A/1026 where identifiable):

• Function: Flame monitoring relay / Flame switch.

• Flame Detection Principle: It works with various Honeywell flame detectors, specifically UV (Ultraviolet) detectors such as C7027, C7035, and C7044. Some R4348A models can also be used with rectification type flame sensors (e.g., flame rods, C7012A/G UV sensors), but the R4348A/1026 specifically mentions compatibility with UV sensors.

• Flame Current Indicator: The "/1026" in the model number indicates that this specific version comes with a flame current LED indicator. This provides a visual cue regarding the flame signal strength. Other variants (like /1018) might have a flame current meter jack socket for more precise measurement with a microampere meter (0-10uA minimum scale).

• Voltage: Selectable for operation at 110/120V / 220/240V AC.

• Operation: Intermittent operation.

• Mounting: Designed for plug-in mounting onto a sub-base (typically included) for surface mounting.

• Applications: Used in commercial and industrial burner applications for flame supervision, ensuring safe operation by detecting flame presence or absence. This includes industrial oil/gas burners.

• Compatibility: Often used in conjunction with other Honeywell burner programmers/controllers like R4341, R4344, R7241, and other R4348 series units.

• Outputs: Provides relay contact outputs to signal flame status.

Important Notes:

• Obsolescence: It's important to note that many Honeywell R4348 series models are considered obsolete and have been replaced by newer series, such as the EC/RM7800 series. While you might find R4348A/1026 units for sale (new surplus, refurbished, or used), for new installations or upgrades, it's highly recommended to consult with Honeywell or a combustion control specialist for compatible modern replacements.

• Approvals: Older models like the R4348 series may not meet the latest approval requirements (e.g., under GAR, LVD, and EMCD) for new installations in Europe. Always verify current certifications for your specific region and application.

In summary, the Honeywell R4348A/1026 is an industrial flame monitoring relay, specifically an R4348A model equipped with an LED indicator for flame current, primarily used in conjunction with UV flame detectors for ensuring flame presence in intermittent burner applications. Due to its potential obsolescence, careful consideration of modern replacements is advised for new systems.

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