Dungs MPA22 - Operating Mode Flowchart: Three Stage Oil Firing (Continued); Pre-Vent and Watchdog Checks

Printed in Germany / M-MT-BOS
• Edition11.99 • # 231 763
73 … 112
If servo drive for air is at characteristic
point P9 and the air-pressure monitor
is not in idle position.
Watchdog loads.
Move servo drive for air to ignition
point P0.
Wait 2 seconds at ignition point
Display in operating mode
Oil firing, three stage
P
S
i
G
L/A
h
l,m
3
P
S
i
G
L/A
h
l,m
3
1
P
S
i
G
L/A
h
l,m
3
P
S
i
G
L/A
h
l,m
3
P
S
i
G
L/A
h
l,m
3
P
S
i
G
L/A
h
l,m
3
2
Pre-vent
Purging time countdown in seconds.
Watchdog pulls up and latches.
Pre-vent
Purging time countdown in seconds.