Honeywell 113228/U Maintenance-Proven Spare Part for Factory Uptime

Overview

Honeywell 113228/U Maintenance-Proven Spare Part for Factory Uptime

The Honeywell 113228/U is an OEM-grade UV flame sensor engineered for continuous duty in industrial burner management and combustion control systems. Designed as a direct replacement for aging or failed sensors in Honeywell RM7800 series burner controls and R7847 amplifier circuits, this spare part is a critical component for any maintenance engineer responsible for boiler rooms, thermal oxidizers, process heaters, and industrial furnaces. Keeping a verified stock of the 113228/U eliminates unplanned downtime caused by flame detection failure — one of the most common causes of burner lockout in process industries.

For procurement engineers managing MRO budgets and spare parts inventories, the 113228/U represents a high-priority, low-cost insurance item. Its relatively low unit cost compared to the downtime risk of a burner trip makes it a standard inclusion in annual maintenance kits and emergency spare parts cabinets. KNMKS supplies this sensor with pre-shipment functional testing, OEM-traceable packaging, and a support terms confirmed by quotation covering manufacturing defects and premature failure under normal operating conditions.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When replacing the 113228/U UV flame sensor during a scheduled outage or emergency callout, maintenance engineers should treat the replacement as an opportunity to inspect the entire flame detection and burner control circuit. The RM7800 series burner control module itself should be checked for relay contact wear, terminal corrosion, and firmware revision compatibility — particularly if the sensor has failed prematurely, which can indicate a control board fault rather than a sensor defect.

The R7847A flame amplifier, which interfaces directly with the 113228/U, should be inspected for secure seating in its base socket and tested for amplifier gain drift. A degraded amplifier will cause nuisance lockouts even with a new sensor installed. Similarly, the burner control wiring harness and terminal block connections at the RM7800 should be torqued to specification and inspected for heat discoloration or insulation cracking.

Upstream of the control circuit, the 24 VAC or 120 VAC power supply feeding the RM7800 should be verified for voltage stability under load. Voltage sag during ignition trials is a known cause of false flame-failure signals. Engineers should also inspect the ignition transformer output and electrode gap, as a weak spark can cause the UV sensor to detect intermittent flame and trigger lockout sequences that accelerate sensor wear.

For sites running Honeywell DCS or BMS integration, the flame signal output wiring from the RM7800 to the supervisory system should be checked for continuity and shielding integrity. Signal interference on unshielded runs can cause spurious flame-failure alarms at the SCADA or BMS level. Where applicable, the 4–20 mA or discrete output signal isolator between the burner control and the DCS input card should be tested for drift.

Procurement teams should maintain a minimum buffer of two 113228/U sensors per burner train, with annual replenishment aligned to the site’s planned maintenance schedule. Sites with multiple RM7800-controlled burners should consider a consolidated spare parts kit that includes the R7847A amplifier, RM7800 control module, and associated terminal block fuses — reducing the mean time to repair across all burner assets.

Site Replacement Workflow

Replacing the 113228/U on-site is a straightforward procedure when the correct spare is on hand. Begin by placing the RM7800 burner control in manual lockout and isolating the burner from fuel and ignition sources per site LOTO procedures. Remove the existing UV sensor from the sight port adapter, noting the orientation and any sealant used on the NPT threads.

Inspect the sight port tube for carbon fouling or UV-blocking deposits, which are a common cause of premature sensor failure. Clean the sight port with a lint-free cloth before installing the replacement 113228/U. Apply a minimal amount of high-temperature thread sealant to the NPT adapter if required by site standards.

After installation, restore power to the RM7800 and perform a manual flame-on test to verify UV signal acquisition. The R7847A amplifier LED indicator should illuminate steadily within the sensor’s specified response time. If the amplifier indicates a weak or intermittent signal, recheck sight port alignment and sensor seating before suspecting a control board fault.

Document the replacement in the site maintenance log, including the sensor serial number, installation date, and technician ID. Update the spare parts inventory to trigger replenishment of the consumed 113228/U unit, maintaining the recommended two-unit buffer per burner train.

Spare Parts Support FAQ

Q: Is the 113228/U compatible with all RM7800 series controls?
A: The 113228/U is designed for use with Honeywell RM7800L, RM7800E, and RM7840 burner controls when paired with the R7847A UV amplifier. Compatibility with specific firmware revisions of the RM7800 should be confirmed against the Honeywell product bulletin for your installed control version.

Q: What does the support terms confirmed by quotation cover?
A: The support terms confirmed by quotation cover manufacturing defects and premature failure under normal operating conditions from the dispatch date. It does not cover damage caused by incorrect installation, sight port contamination, voltage surges, or operation outside the specified temperature range.

Q: How is the 113228/U tested before shipment?
A: Each unit undergoes a functional UV response verification test prior to dispatch. Units that fail to meet the minimum UV sensitivity threshold are quarantined and not shipped. A test record is available upon request for quality-critical applications.

Q: Can KNMKS support long-term supply agreements for the 113228/U?
A: Yes. KNMKS supports blanket purchase orders and long-term supply agreements for the 113228/U and associated RM7800 series components. Contact our sales team to discuss annual volume commitments, lead-time guarantees, and consignment stock arrangements for high-uptime facilities.

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Product Identification

Brand / Ecosystem

Honeywell
Honeywell

Model / Series

113228/U

Product Family

Sensors

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Sensor range

Photoelectric, proximity and process sensors

Common needs

Output type, distance and connector

Project support

Machine detection and replacement inquiry

Inquiry Support

• NPN/PNP, analog and digital output checking
• Connector and cable compatibility review
• Fast inquiry support for maintenance teams

What to Send Us

• Brand and exact model number: Honeywell 113228/U
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference