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Chapter 5. Trial Operation and Adjustment
Handling Precautions
• If it is necessary to repeat the test, each time it is repeated be sure to stop all
the equipment first to prevent an explosion and then discharge all unburned
gas that has accumulated in the combustion chamber and exhaust flue.
Safety shutoff check
•
Interlock check
During burner combustion, simulate the operation of each type of interlock and
check if this device is locked out or stops.
Then, restart the burners and check for proper ignition.
•
Ignition trail failure check
Close the manual gas cock of the burners. Turn on the start input of the burners
to begin operation. After the prepurge, pilot burner ignition is attempted. Since
the manual cock is closed, however, the pilot burner does not ignite and lockout
occurs.
After confirming the above behavior, open the manual cock. Turn on the reset
switch, restart the burner and check that they ignite properly.
•
Flame failure check
Close the manual gas cock while the burner is operating. After the flame failure
response time elapses, the pilot valve and main valve close and lockout occurs.
After confirming the above behavior, open the manual cock. Turn on the reset
switch, to restart the burners and check that they ignite properly.
•
Power loss (power failure) check
Turn off the power switch during burner operation in order to stop combustion.
After waiting for a while, turn on the power back on.
Then, turn on the start input to restart the burners, and check that they ignite
properly.
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