The Honeywell C7061A1020, also cataloged as the C7061A Ultraviolet Flame Detector, operates as a dynamic self-checking flame detector for sensing ultraviolet radiation generated by gas, oil, or alternative fuel combustion when paired with 7800 Series controls and R7861 amplifiers.

Model Configuration

The C7061A1020 represents a specific configuration within the C7061A product family, featuring an integral Brad Harrison connector and a cast-aluminum enclosure rated to NEMA 4 standards. It incorporates a built-in mechanical shutter mechanism to verify tube integrity periodically during burner operation.

Hardware Specifications

Brand-Specific Engineering Characteristics

Designed for integration with Honeywell 7800 Series Flame Safeguard Control and R7861 dynamic self-check amplifiers, the detector relies on an oscillating shutter that interrupts ultraviolet radiation reaching the UV sensor 12 times per minute. This cyclic interruption allows the primary control amplifier to verify amplifier circuitry and tube response continuously, ensuring fail-safe operation in heavy industrial burner applications.

Installation and Electrical Integration

• Sighting Alignment: Position the detector to view the first 30 percent of the flame closest to the burner nozzle where ultraviolet radiation is most intense. The notch and arrow on the faceplate must align vertically with the notch up and the arrow down.
• Orientation: Mount the housing with the conduit or connector opening approximately 45 degrees below the horizontal plane.
• Wiring Requirements: Use NEC Class 1 wiring. Keep signal leadwires as short as possible to minimize signal degradation from cable capacitance. Do not run detector wiring in the same conduit with high-voltage ignition transformer wires.
• Parallel Configuration: A maximum of two C7061 detectors can be wired in parallel to reduce nuisance shutdowns on difficult-to-sight burners. When connected in parallel, the minimum ambient operating temperature increases from -40 deg C (-40 deg F) to -23 deg C (-10 deg F).

Frequently Asked Questions

• Q: What flame safeguard controls are compatible with the C7061A1020?

  A: The detector is designed for use with Honeywell 7800 Series flame safeguard controls utilizing an R7861 dynamic self-check amplifier.

• Q: What is the function of the oscillating shutter?

  A: The shutter interrupts ultraviolet radiation reaching the UV sensor 12 times per minute to provide automatic sensor tube and amplifier circuitry self-checking functions.

• Q: What type of electrical connection does the C7061A1020 use?

  A: This model is equipped with an integrated Brad Harrison 41310 connector for rapid electrical installation.

• Q: What are the enclosure environmental ratings?

  A: The C7061A housing meets NEMA 4 requirements, providing indoor and outdoor protection against rain, dust, and hose-directed water.

• Q: Can multiple C7061 detectors be wired to a single control?

  A: Yes, up to two C7061 detectors can be wired in parallel to the same terminals on 120-volt flame safeguard controls to prevent nuisance shutdowns.

• Q: What is the recommended sight pipe material?

  A: Use a black iron pipe with a diameter of at least 3.8 cm (1-1/2 NPT). Avoid stainless steel or galvanized pipe because they reflect ultraviolet radiation internally.

• Q: What maintenance is required for the sensing tube?

  A: The ultraviolet sensing tube should be replaced after 40,000 hours of continuous use to prevent failure in discriminating flame conditions.

• Q: What is the operating temperature range?

  A: The ambient operating temperature range outside the case is -40 deg C to 80 deg C (-40 deg F to 175 deg F) with the standard sensing tube.