Honeywell 7800 Series Installation Instructions Manual page 11

Safety Shutdown (Lockout)
Occurs If:
INITIATE Period:
1. Purge card is not installed or is removed.
2. Purge card is defective.
3. Configuration jumpers were changed (after 200
hours of operation).
4. Ac line power errors—see Operation.
5. Four-minute INITIATE period is exceeded.
STANDBY Period:
1. Flame signal is present after 240 seconds. Preigni-
tion Interlock is open an accumulative time of 30
seconds.
2. Airflow Switch feature is enabled and the Airflow
Switch is closed for 120 seconds with Limits and
Burner Control closed.
3. Ignition/pilot valve/intermittent pilot valve terminal
is energized.
4. Main valve terminal is energized.
5. Internal system fault.
6. Purge card is not installed or is removed.
7. Purge card is defective.
8. Lockout Input opens during STANDBY.
PURGE Period:
1. Preignition Interlock opens anytime during PURGE.
Flame signal detected during PURGE.
2. Airflow Switch Input does not close within 10 sec-
onds.
3. If Airflow Switch is disabled, there is no jumper
between terminals 6 and 7.
4. Airflow Switch opens during PURGE.
5. Lockout Input opens during PURGE.
6. Ignition/pilot valve/intermittent pilot valve terminal
is energized.
7. Main valve terminal is energized.
8. Internal system fault.
9. Purge card is removed.
10. Purge card is defective.
PREIGNITION Period:
1. Lockout Input opens during PREIGNITION.
2. Airflow Switch opens during PREIGNITION.
3. Preignition Interlock opens during PREIGNITION.
4. Ignition terminal is not energized.
5. Pilot valve/intermittent pilot valve terminal is ener-
gized.
6. Main valve terminal is energized.
7. Internal system fault.
8. Purge card is removed.
9. Purge card is defective.
SAFETY 1 Period:
1. Lockout Input opens during SAFETY 1.
2. Airflow Switch opens during SAFETY 1.
3. Low Fire Switch opens.
4. No flame is present at the end of SAFETY 1.
NOTE: Some devices allow five ignition attempts.
5. Ignition terminal is not energized.
EC7820A 7800 SERIES RELAY MODULES
6. Pilot valve/intermittent pilot valve terminal is not
energized.
7. Main valve terminal is energized.
8. Internal system fault.
9. Purge card is removed.
10. Purge card is defective.
11. Preignition Interlock opens during SAFETY 1.
PILOT STAB. Period:
1. Lockout Input opens during PILOT STAB.
2. Airflow Switch opens during PILOT STAB.
3. Low Fire Switch opens.
4. No flame is present.
NOTE: Some devices allow three ignition attempts.
5. Ignition terminal is energized.
6. Pilot valve/intermittent pilot valve terminal is not
energized.
7. Main valve terminal is energized.
8. Internal system fault.
9. Purge card is removed.
10. Purge card is defective.
11. Preignition Interlock opens during PILOT STAB.
MAIN TRIAL Period:
1. Lockout Input opens during MAIN TRIAL.
2. Airflow Switch opens during MAIN TRIAL.
3. Low Fire Switch opens.
4. No flame is present.
NOTE: Some devices allow five ignition attempts.
5. Ignition terminal is energized.
6. Pilot valve/intermittent pilot valve terminal is not
energized.
7. Pilot valve is energized during MAIN TRIAL
stabilization.
8. Main valve terminal is not energized.
9. Internal system fault.
10. Purge card is removed.
11. Purge card is defective.
RUN Period:
1. No flame is present.
NOTE: Some devices allow five ignition attempts.
2. Lockout Input opens.
3. Ignition/interrupted pilot valve terminal is ener-
gized.
4. Main valve terminal is not energized.
5. Internal system fault.
6. Purge card is removed.
7. Purge card is defective.
8. Airflow Switch opens.
11 32-00197—01