63 … 68
62 … 68
Printed in Germany • Edition 02.14 • Nr. 254 722
15 Time diagram
MPA51xx
by means of an extended module
General version
Viessmann version
Error
Waiting for heat request
Waiting for parameter record stick adjustment
Idle state control: Fan/stepped motor
Idle state control LDW (air pressure switch)
Watchdog loading phase
Startup phase: Fan/stepped motor
Waiting for air pressure
VPS A: Decision
VPS A : Emptying the area between the valves
VPS A: Test time V1
VPS A: Filling the area between the valves
VPA A: Gas pressure detection
VPS A: Test time V2
Pre-aeration A
Parameter
P40 P42 P43 P44 P45 P60
Time
0...
0...
max. 3 min
max. 2 min
max. 2 min
3 s
max. 2 min
max. 30 s
0.1 s
1...3 s
1...240 s
1...3 s
0.1 s
1...240 s
0...1 h
State number
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Safety chain
Watchdog
Alarm
Temperature controller
Additional valve *4
Y1 Y3
V1
Y2 Y1
V2
Y3 Y2
Ignition
Fan relay
PWM1 (fan)
*2a
*2b
PWM2 (for ex. analogue 0...10 V)
● *2a
*2b
PWM3 (for ex. analogue 4... 20 mA)
● *2a
*2b
Stepped motor
● *2a
*2b
Flame (ionisation)
LDW *1
GDW min.
GDW VPS *5
Parameter record stick active
●
Parameter VPS Startup
Parameter VPS Regular switch-o
*1) The monitoring of the LDW depends on
the operating mode set in P14.
*2) Analogue and fan capacities as well as fan
speed can be set by means of curves.
a) Special modulation point: OFF
b) Special modulation point: Pre-aeration A
c) Special modulation point: Pre-aeration B
d) Special modulation point: Ignition position
e) Special modulation point: STA
f) Special modulation point: Stabilisation A
g)
Special modulation point: Stabilisation B
h) Parameter P67: Start modulation degree
Standard mode
i) Parameter P81: Regular switch-o: Power
during transition
j) Special modulation point: Post-aeration
*3) In the waiting program state, the rst wait-
ing time is 2 minutes, then 5 minutes, then 1
hour and afterwards a time period which can
be set by means of a parameter between 1
minute and 50 hours. If the set time period is
smaller than the rst three intervals, these are
also reduced. Another parameter indicates
whether a fault switch-o is allowed and, if
yes, how many restart attempts are to be
carried out until the automatic burner control