Ignition spark response test n
WARNING
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.
Procedures ●
(1) Close the manual shut-off valves of the pilot burner and main burner.
(2) Operate the burner to perform the ignition operation. The ignition spark is
then started. At this time, check that the flame relay (K2) of the burner control-
ler is not excited. (K2 is the flame relay for the AUR300C/350C, and K6 is the
flame relay for the AUR450C.)
(3) If the flame relay is excited, adjust the monitoring point of this unit again to
avoid the influence of the ignition spark and its reflection.
Handling Precautions
The following shows various sources other than flame, that may activate •
this unit. Check that the unit operation is not influenced under all operat-
ing conditions.
Examples:
Ultraviolet ray
source
Scorching furnace wall with a temperature of 1371 °C or more
Ignition transformer and welding arc spark (lightning)
Gas laser
Sunlamp
Disinfecting lamp, ultraviolet ray radiation lamp, fluorescent lamp
Strong flash light (toward UV sensor)
Gamma-ray and
X-ray source
X-ray diffraction and gamma-ray analysis measurement equipment
Electron microscope
X-ray camera
High voltage vacuum switch
High voltage capacitor
Radioactive isotope
Other sources producing ultraviolet rays, gamma-rays, and X-rays
Firmly mounting of monitoring pipe n
(1) When the equipment is operated properly with the specified flame voltage out-
put after all adjustments have been completed correctly, turn OFF the power to
the equipment, remove this unit, and weld the monitoring pipe firmly.
(2) Mount this unit on the monitoring pipe firmly and perform the final wiring
completely.
Final inspection n
To control the burner properly, perform at least one cycle operation of the equip-
ment to check that all control operations function correctly.
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