Dungs MPA22 User Manual

Printed in Germany / M-MT-BOS
• Edition 11.99 • # 231 763
26 … 112
Time diagram
Oil firing, three stage
Time diagram for MPA22 oil firing, three stage
Definitions of individual states
Start-up tests Processor and program memory test/move servomotor to reference point
State 01 Start-up decision (heating request issued)
State 02 Idle state check, blower
State 03 not used
State 04 Pre-ventilation
State 05 Pre-ventilation / energize and test watchdog
State 06 Pre-ventilation
State 07 Move servomotor air to ignition position
State 08 Waiting time in ignition position
State 09 Start-up safety period
State 10 Stabilising time
State 11 Move servomotor from ignition point to first stage
State 12 Operation
State 17 Remaining postventilation time
State 18 Restart lockout time
State 20 Start-up wait state (standby)
State 21 Postventilation before error
Footnotes:
1* The blower runs during the leakage test until the postventilation period elapses. The servomotor air then enters
standby state.
2* The blower starts with State 06 and has 3s for start-up. The air pressure is now monitored, provided that the
watchdog function is active.
=> To ensure that the pre-purge is performed at the max. possible flowrate, the pre-purge period should be
increased by 3s in the EEPROM.
3* Valve Y2 is activated in stage 2 and valves Y2 + Y3 are activated in stage 3 depending on power input demand
or eBUS default and air damper position.
Start-up tests 01 02 04 05 06 07 08 09 10 11 12 17 18 20
State number
Display
Closed-loop
control sequence
ÖW max
ÖW min
Air pressure switch
Flame
GW VPS
Blower motor
Ignition
Valve Y1
Valve Y2
Valve Y3
Operation
Fault
Watchdog
SAD air
SAD gas
VPS flag
Duration
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Output
Output
Output
I / O
I / O
Flag
TEST L 1 2 4 5 6 7 8 9 10 11 12 17 18 OFF
<3
s
--->Ref
P9P9-->P9 P9 -->P0 P0 P0 P0 -->P1
–––
Ref.
P1-P9
–––
->Stby
Stby
1*
6*
<3,5
s
1
s
<30
s
5
s
0,3
s
10..60
s
<30
s
2
s
2..5
s
1..60
s
8..30
s
<24
h
1..240
s
0..100
min
<24
h
disregarded in case of “oil burner”
In the operating mode “oil firing, three stage”, the “coding plug oil” is assigned to the input
6*
5*
Start and controlled shut-down with flame
Watchdog function active

Dungs MPA22 Specifications

General

Brand	Dungs
Model	MPA22
Category	Controller
Language	English