Azbil AUR450C - Safety Shutoff Test Procedures; Interlock Operation Verification

4-6
Chapter 4. TRIALRUN ADJUSTMENT
 Safety shutoff test
After all operational adjustments have been completed, carry out the safety shutoff
test.
z Pilot ignition failure (ignition failure)
(1) Close the pilot and main manual fuel valves.
(2) Press the start switch.
>>Operation begins.
(3) Normally, for pilot burner ignition, the pilot valve opens. Check that there is
lockout with the FLAME LED not lit so that the main valve does not open if
the flame fails.
z Flame failure during RUN-state
(1) Open the pilot and main manual fuel valves.
(2) Press the start switch to begin operation.
(3) When the sequence has progressed correctly and RUN has begun (main valve
has opened), close the pilot and main manual fuel valves to put out the burner
flame. Then, check that flame failure is detected and that safety shutoff is cor-
rectly activated.
z Interlock operation check
Activate each interlock, and check that the system is locked out.
Handling Precautions
•
Be sure to continue the reset input for more than 1 second. A reset input
less than 1 second long may not cancel the lockout