SSB 6720866940 (2017/11) US
Product description | 5
2.3 Start/Stop cycle
Fig. 1 Burner ignition cycle diagram
False ame detection
If ame is detected at the end of the pre-spark period (Ignit_0) a lockout error occurs (This lockout has a maximum of 3 auto
resets).
Re-ignition
If at the end of the safety period no ame is detected the control will go to post-purge to remove the unburned gas. After this a
re-ignition attempt is started following the same cycle.
The number of re-ignition attempts is limited to Max_Ignit_Trials after which a lockout occurs.
Intermittent operation
The burner can only be ON continuously for a period of 24 hours.
After this the burner is switched OFF and a restart sequence follows.
Flame establishing time
Sparking stops Spark_Before_End_Of_Safety_Period seconds before the end of the Ignit_1 period to allow for ionization
detection.
Flame out too late If after Max_Post_Purge_0 time ame is still detected a lockout follows.
Safety relay test In Safety ON/OFF state the correct working of the safety relay is proven.
Demand
Once the ignition sequence is started it will be nished*. Even if the demand is taken away during the ignition sequence the
sequence up to the burn state is ended.
If during Burn_0 state the demand is taken away, a Post_Purge_Period follows at Post_Purge_Speed speed.
Tab. 1
To Next Page
Loading...
Need help?
General