SATRONIC - Control boxes for oil burners

DMG 973
CIRCUIT AND TIMING DIAGRAM DMG 973
WITH AIR DAMPER MOTOR
Ph
N
Ph
N
max. 10A fast
6A low
IRD- OR UVD CONNECTION
IRD 1020
UVD 971
BLOCK DIAGRAM DMG 973
μC
Watchdog
Reset
Flame
amplifier
Oscillator
rlk
HS ST GW RT
1 2 3 4 5 6 C B 7 9 8 A
IS Z M V1 L SA
WITHOUT AIR DAMPER MOTOR
max. 10A fast
6A low
HS ST GW RT
1 2 3 4 5 6 C B 7 9 8 A
IS Z M V1 V2 SA
rv2
EEPROM
μC
blue
black
brown
RZ RV1 RV2 RLK RS
Fault display
Information
system
rv1 rz rs
term. 8
term. 2
term. 9
Reset and
lock out
Mains
monitoring
Power
supply
monitoring
Power
supply
2 C 6 5 7 4 3 B 8 9 A
LW
LW
EV
EV
tlw tv1 tlk tr tvz tz ts tv2
5
HS Mains switch
GW Gas proving switch
ST Limit thermostat
RT Control thermostat
EV External reset and lock out button
IS Ionisation probe
(IRD 1010, UVD 970 see separate
diagram)
Z Ignition
M Burner motor
V1 Solenoid valve, 1st-stage
V2 Solenoid valve, 2nd-stage
LW Air proving switch
SA External lock out signal
L Air damper motor
tlw max. reaction time for air proving
switch
tv1 Supervised pre-purge time
tlk LK-open command during
pre-purge
tr LK-close movement
tvz Pre-ignition time
tz Ignition time total
ts Safety time
tv2 Delay terminal 6