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Chapter 1. Overview
The AUR455 dynamic self-checking burner controller (hereafter “this device”) can be used for both continuous
operation and batch operation. It is a combustion safety controller that employs the correct ignition sequence
to automatically and safely ignite gas burners and oil burners. This device can be used in combination with the
AUD300C advanced ultraviolet flame detector, the AUD500C explosion-proof advanced ultraviolet flame detector,
or a flame rod.
The AUR455 drives the shutter that is built into the AUD300C/500C to continuously check both its own flame
detection circuit and the ultraviolet detector in order to provide flame detection for continuous burner operation.
When used with a flame rod, the AUR455 continuously checks its own built-in flame detection circuit to provide
flame detection for continuous burner operation. Also, it is equipped with a 7-segment display that can be used
in maintenance, a trial operation mode that is convenient for trial operation and adjustment, and other features.
Additionally, the device is equipped with host communications (RS-485) and a smart loader package function,
allowing more detailed observation of status and troubleshooting.
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The combustion sequence, alarm codes and flame voltage are shown on the 7-segment display.
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LED indicators show whether there is a flame signal and indicate lockout.
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Self-diagnosis of the internal control relay circuit
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If lockout occurs due to ignition failure or unexpected flame failure, the controller does not restart without a
manual reset.
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Equipped with host communications (RS-485) to enable remote monitoring.
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DIN rail mounting and a sub-base structure are provided for easy installation and replacement.
Handling Precautions
• This device has functions that are extremely important for the safe operation of
combustion equipment. Carefully follow the instructions for its use that are given
in this user’s manual.
• This device should be installed, wired, inspected, adjusted, and maintained by
experienced specialists who have knowledge and skills concerning combustion
equipment and flame safeguard system.
