Safety Precautions
Safety precautions are intended to ensure the safe and correct use of this product, to prevent injury to the operator
and others, and to prevent damage to property. Be sure to observe these safety precautions. Please make sure you un-
derstand the safety guidelines before reading the rest of this manual.
e use of this product in a manner not specied by the manufacturer will impair its built-in safety features.
WARNING
Do not combine this unit with a unit other than Azbil Corporation's flame safeguard control burner
controller.
Make sure that this device does not detect ultraviolet rays other than those of the burner flame. If it
responds to other ultraviolet rays, flame failure in the burner will not be detected. As a result, fuel will
continue to be discharged, causing a very serious explosion hazard.
Before removing, mounting, or wiring the AUD300C, be sure to turn off the AUD300C and all con-
nected devices. Failure to do so might cause electric shock.
Before wiring the AUD300C, be sure to turn the power OFF. Failure to do so might cause electric
shock.
To prevent an explosion trouble, carry out the pilot turndown test firmly. If this unit detects a small
pilot flame, which cannot ignite the main burner, it is determined that flame failure does not occur in
the flame safeguard control even though the flame failure occurs in the main burner. Thus, the fuel
is supplied continuously, causing an exposition accident, resulting in a serious hazard.
When performing the pilot turndown test repeatedly, stop the equipment completely every time
the pilot turndown test is completed in order to completely discharge the unburnt gas or oil accu-
mulated in the combustion chamber or flue.
If the unburnt gas or oil is not discharged completely, this may cause an explosion accident.
Do not touch the AUD300C or the F or G terminals of the burner controller immediately after the
power to the burner controller has been turned OFF. The F and G terminals are still electrically alive
for 1 minute after the power has been turned OFF, causing an electric shock hazard.
When measuring the voltage between the F-terminal and G-terminal of this unit in the wiring check,
do not touch any terminal by bare hand.
Doing so may cause an electric shock.
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