Siemens QRI2B2.B180B1 Replacement for QRI Series

Product Overview

Siemens QRI2B2.B180B1 Replacement for QRI Series: Seamless Transition & Compatibility Upgrade

The Siemens QRI2B2.B180B1 is a high-reliability infrared flame detector engineered for integration into Siemens QRI Series burner management and combustion control systems. As legacy flame supervision assemblies reach end-of-life or become increasingly difficult to source, facilities engineers and procurement teams are actively seeking verified drop-in replacements that preserve existing wiring infrastructure, control cabinet layouts, and burner controller logic without requiring full system redesign.

This unit is designed to replace aging or discontinued QRI-family detectors — including earlier QRI2A and QRI1 variants — while maintaining full compatibility with Siemens LME, LMO, LMG, and LGB burner control units. Whether you are managing a scheduled maintenance window, responding to an unplanned detector failure, or executing a phased modernization of your combustion control architecture, the QRI2B2.B180B1 delivers a technically sound, procurement-ready solution with minimal commissioning overhead.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful flame detector replacement rarely occurs in isolation. When migrating from a legacy QRI1 or QRI2A detector to the QRI2B2.B180B1, field engineers typically review the broader combustion control assembly to ensure all interfacing components are equally serviceable and compatible.

The Siemens LME22.331C2 burner control unit is the most common controller paired with this detector in oil-fired forced-draft burner applications. If the existing LME11 or LME21 controller is also approaching end-of-life, upgrading to the LME22 series simultaneously eliminates a second maintenance window and ensures the flame signal interface remains factory-matched. Similarly, the Siemens AGM11 ignition transformer and QAY2.1 duct temperature sensor are frequently replaced as part of the same combustion system service cycle.

For installations where the burner management panel includes a Siemens RWF40 or RWF55 burner sequence controller, the QRI2B2.B180B1 integrates without any controller parameter changes, as the flame signal conditioning remains within the same analog range expected by the RWF series. Facilities running Siemens SQM40 or SQM48 actuators on the air damper or fuel valve will find that the detector swap does not affect actuator sequencing or modulation logic.

In control cabinet environments where terminal blocks and cable management are being refreshed, sourcing Siemens LOGO! 8 compact logic modules or Siemens S7-1200 CPU 1212C units alongside the detector replacement allows the facility to consolidate procurement and reduce freight cycles. For sites using Siemens SITRANS flow or pressure transmitters in the same combustion loop, the QRI2B2.B180B1 replacement can be scheduled within the same planned outage window, minimizing total downtime exposure.

Where older Siemens QRB1 or QRB3 UV flame detectors are present on adjacent burners within the same boiler room, a phased migration to the QRI infrared series is recommended to standardize spare parts inventory and simplify technician training across the site.

Retrofit Guidance FAQ

Q: Can I reuse the existing wiring when replacing a QRI1 or QRI2A with the QRI2B2.B180B1?
A: Yes. The QRI2B2.B180B1 uses the same 2-wire connection standard as earlier QRI-family detectors. Existing cable runs, terminal assignments, and conduit routing are fully retained. No rewiring is required in the control cabinet or at the burner head.

Q: Do I need to modify the burner controller program or parameters after replacement?
A: No program changes are required when replacing within the QRI family. The flame signal output characteristics of the QRI2B2.B180B1 are compatible with the sensitivity thresholds and timing parameters pre-configured in Siemens LME, LMO, LMG, and LGB controllers. Verify the flame signal strength reading on the controller display during first-fire commissioning as a standard check.

Q: Is the physical mounting interface identical to the legacy QRI models?
A: Yes. The QRI2B2.B180B1 uses the standard QRI bayonet or screw-mount interface. No modification to the burner head detector port, sight tube, or mounting flange is required. Installation time is typically under 15 minutes for a trained technician.

Q: What communication protocol does this detector use?
A: The QRI2B2.B180B1 operates on a hardwired analog flame signal — there is no digital fieldbus or network protocol involved. This means no IP addressing, no PROFIBUS DP configuration, and no changes to any PLC or DCS communication setup are needed.

Q: Can this detector be used in a system where the burner controller has already been upgraded to a newer Siemens model?
A: Yes. The QRI2B2.B180B1 is forward-compatible with current-generation Siemens burner controllers including the LME22, LMO44, and LMG21 series. If your site has already upgraded the controller but retained the legacy detector, this replacement completes the modernization without further system changes.

Q: What is the recommended commissioning procedure after installation?
A: After mechanical installation and wiring verification, perform a standard burner start sequence and confirm the flame signal is detected within the controller’s acceptance window. Check the flame signal LED or display indicator on the burner controller. Conduct a flame-out test to verify the safety shutdown response time meets the system specification. Document the commissioning result in the site maintenance log.

Warranty Assurance

Every Siemens QRI2B2.B180B1 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to dispatch, each unit undergoes functional verification to confirm detector response, signal output integrity, and physical condition. Units are packaged in anti-static, impact-resistant packaging suitable for international freight.

In the event of a confirmed defect within the warranty period, TOPNLMS provides replacement unit dispatch or full refund processing within agreed lead times. Our after-sales response team is reachable via email and phone for technical pre-sales consultation, cross-reference verification, and post-installation support queries.

For procurement teams managing approved vendor lists, blanket purchase orders, or project-based sourcing, TOPNLMS can provide product documentation, test records, and shipping confirmations to support your internal compliance and quality assurance requirements.

Stock is maintained in Xiamen, China, with standard dispatch within 1–3 business days of order confirmation. Express freight options are available for urgent replacement scenarios where minimizing combustion system downtime is the primary procurement driver.