Azbil AUR450C - Safety Cautions - Wiring and Operation; Electrical Connections and Load Ratings; Grounding, Flame Detection, and Testing

iv
CAUTION
Make sure the load connected to each terminal does not exceed the rating indicated in the
specifications.
If timers and auxiliary relays are needed for additional functions, select ones with high
reliability, and be sure to design the circuit correctly.
When installing and wiring, be sure to follow the instructions in this manual and in the user's
manual for the combustion equipment.
The ignition transformer ground lead should be connected directly to the burner body or to a
metallic part electrically connected to the burner body.
Run the high-voltage ignition transformer cable separately and keep it at least 10 cm away
from this device.
Keep power lines and ignition transformer high-voltage cables separate from the
AUD300C/500C cables and from the external reset input cable.
Make sure that ignition transformer high-voltage cables are properly connected to prevent
faulty contact. Faulty contact might generate high-frequency radio waves which can cause
malfunction.
Always connect the power supply last. Otherwise, touching a terminal accidentally could
result in electric shock or damage.
Always supply electric power at the voltage and frequency stated on the model label of this
device.
In keeping with technical standards for electrical equipment, the burner body must have an
earth ground connection with a resistance of less than 100 .
After the wiring is complete, be sure to check that it is correct. Incorrect wiring may cause
damage or faulty operation.
Make sure that the flame detector does not detect the ignition spark. If the flame detector
can detect the spark, change the detector's line of sight or change the ignition electrode's
position.
Only an experienced technician who has knowledge and technical skills related to
combustion equipment and combustion safety should carry out the pilot turndown test.
This product is equipped with 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.
If the safety shutoff has been activated, check all of the items on the checklists in chapter 4,
TRIAL-RUN ADJUSTMENT before restarting the equipment.
When doing a maintenance inspection of the burner, be sure to do the pilot turndown test.
Inspection must be done at least once a year.
Conduct periodic inspections in accordance with the user's manual of the equipment
manufacturer.