Honeywell C7061A1020

Honeywell C7061A1020

Product Overview
The Honeywell C7061A1020 is a dynamic self-check ultraviolet flame detector designed for industrial burner management systems. It detects ultraviolet radiation produced by the combustion of natural gas, oil, or other fuels. The C7061A1020 belongs to the C7061A series and is intended for standard, non-hazardous locations. It is commonly used with the R7861 dynamic self-check flame amplifier and Honeywell 7800 series burner controls.

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Description

Honeywell C7061A1020

Technical Specifications

  • Brand: Honeywell
  • Model: C7061A1020
  • Product Type: Dynamic self-check ultraviolet flame detector
  • Detection Method: Ultraviolet radiation sensing
  • Compatible Amplifier: R7861
  • Compatible Controls: Honeywell 7800 series burner controls
  • Mounting Connection: 3/4 inch NPT
  • Electrical Rating: 220 Vac
  • Frequency: 50 Hz and 60 Hz
  • Ambient Temperature Range: -40°C to +79°C
  • Storage Temperature Range: -50°C to +80°C
  • Enclosure Rating: NEMA 4
  • Weight: Approximately 2.6 lb or 1.2 kg
  • Dimensions: Approximately 133 mm diameter including mounting flange by 183 mm long
  • Leadwire Length: Approximately 2.4 m or 96 in
  • Housing: Cast-aluminum cover with violet finish and heat-insulating faceplate

Functional Features

  • Detects ultraviolet radiation from gas, oil, and other fuel flames.
  • Provides dynamic self-check of the UV sensing tube through an oscillating shutter.
  • The shutter interrupts ultraviolet radiation at a rate of 12 times per minute to verify detector operation.
  • Works with the R7861 amplifier to confirm amplifier circuit integrity through the 7800 series controller microprocessor.
  • Supports mounting in horizontal, vertical, or intermediate angles.
  • Allows field replacement of the UV sensing tube and quartz viewing window.
  • Supports parallel connection of two detectors to reduce nuisance shutdowns in difficult flame sighting applications.
  • Includes a built-in heat block in the mounting flange for thermal protection.
  • Uses color-coded leadwires for straightforward electrical installation.
  • Compatible with Brad Harrison 41310 type connector options.

Application Scenarios

  • Gas-fired industrial burners.
  • Oil-fired industrial burners.
  • Boilers and process heaters.
  • Honeywell 7800 series burner management systems.
  • Retrofit and maintenance of legacy combustion control systems.
  • Applications requiring continuous flame presence verification.

Performance Parameters

  • Ultraviolet sensing tube rated down to -40°C.
  • Shutter mechanism provides continuous dynamic self-check.
  • Quartz viewing window pressure rating is 20 psi or 138 kPa for the C7061A series.
  • Flame signal is processed by the R7861 amplifier, with acceptable flame signal typically referenced at a minimum of 1.25 Vdc in supported 7800 series amplifier applications.
  • Exact response time depends on the associated amplifier and burner control configuration.

Material Composition

  • Cast-aluminum housing with protective coating.
  • Quartz viewing window.
  • Ultraviolet sensing tube.
  • Oscillating shutter assembly.
  • Heat-insulating mounting flange.
  • Color-coded electrical leadwires.
  • Gaskets and sealing components.

Structural Characteristics

  • Cylindrical detector body with a mounting flange.
  • Front quartz viewing window for flame sight-line access.
  • Internal oscillating shutter that periodically interrupts UV radiation.
  • Built-in heat block in the flange to reduce heat transfer from the burner.
  • NEMA 4 enclosure suitable for indoor and outdoor protection against rain, dust, and hose-directed water.
  • Field-serviceable UV tube and viewing window.
  • Alignment features on the faceplate to ensure correct shutter orientation.

Working Principle
The C7061A1020 senses ultraviolet radiation emitted by a flame. When flame radiation passes through the quartz viewing window, the UV sensing tube generates an electrical signal. The internal shutter periodically interrupts the UV radiation to confirm that the sensing tube remains functional. This dynamic self-check prevents silent failure caused by tube aging or optical blockage. The signal is sent to the R7861 amplifier, which evaluates flame presence and communicates the status to the burner control system.

Installation Requirements

  • Install in a location with a clear sight line to the flame.
  • Mount using the 3/4 inch NPT connection or suitable sight pipe.
  • Ensure the faceplate alignment reference points are correctly positioned so the shutter operates properly.
  • Maintain adequate thermal separation from high-temperature burner surfaces.
  • Use color-coded leadwires or a compatible connector for electrical wiring.
  • Verify that the supply voltage matches the 220 Vac rating of the C7061A1020.
  • Confirm compatibility with the R7861 amplifier and the associated burner control.
  • Follow applicable electrical, combustion safety, and plant installation standards.

Precautions for Use

  • The C7061A1020 is not intended for explosion-proof or hazardous location applications; use the C7061F series where required.
  • Keep the quartz viewing window clean and free of dust, oil, or combustion deposits.
  • Do not operate the detector without a compatible R7861 amplifier and approved burner control.
  • Verify flame signal during commissioning and after maintenance.
  • Replace damaged UV tubes, windows, gaskets, or shutter components with approved parts.
  • Store spare detectors in dry, clean, and static-safe conditions.
  • Do not exceed the specified ambient temperature range.
  • Refer to official Honeywell documentation for wiring, alignment, and safety procedures.

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