Burner Program Sequence Of Operation - Viessmann Vitodens 100-W WB1B Series Installation And Service Instructions Manual

Vitodens 100-W, WB1B Installation & Service

Burner Program Sequence of Operation

Call for heat
Fan control
Fan required
signal
Ignition
Combination
gas valve
Flame signal Start-up and Maintenance
Sequence time
max. 70 s *1 max. 20 s
* 50 seconds for no flame present check and 20 seconds for blower stand-stil check (total 70 seconds).
1
* 20 second fan operation if flame failure is detected.
2
Phase Explanation
0 Stand by
1 Stand-still status test (safety check)
2 Maximum blower RPM verification
3 Pre-purge
Start-up and Maintenance
4 Pre-ignition time
5 Ignition / safety timing
6 Flame stabilization time
7 Forced low-fire
8 Burner in operation: controller active
9 Post-purge
10 Combination gas valve proof of closure test
0 Boiler shutdown / stand-by
>1500 rpm
0.9 s 0.3 s
Transition
min. 4.2 s
5 s 0.12 s
max. 4.8 s
Modulation range
End of sequence
Continue to next phase
Safety shutdown
Continue to next phase
Continue to next phase
Retrial for ignition or safety shutdown
Continue to next phase
Continue to next phase
Continue to next phase
Continue, or if FHL tripped, 15 minute forced fan operation
Continue to next phase
Continue to next phase
Waiting for next call for heat
Additional Information
>1500 rpm
1.4 s *2
89