SATRONIC - Control boxes for oil burners

DMO 976
CIRCUIT AND TIMING DIAGRAM DMO 976
WITH AIR DAMPER MOTOR
Ph
N
Ph
N
max. 10 A fast
6 A slow
F
IRD-/UVD-CONNECTION
IRD 1010
UVD 970
BLOCK DIAGRAM DMO 976
μC
Watchdog
Reset
Flame
amplifier
Oscillator
rlk
rv2b
L Z M V1 OV SA
RZ RV1 RV2 RLK RS
rv1b
rv2a
blue
black
brown
EEPROM
μC
rv1a
HS ST RT EV
1 2 B C 3 4 5 6 7 8 9 A
FT
V2 Z M V1 OV SA
rz
rs
term. 2
term. 1
term. 9
Fault display
Information
system
ta tv1 tlk tr tf ts tn tv2
Reset and
lock out
Mains
monitoring
Power
supply
monitoring
Power
supply
1 2 C B 5 4 6 3 7 8 9 A
*
HS ST RT EV
1 2 B C 3 4 5 6 7 8 9 A
F
WITHOUT AIR DAMPER MOTOR
max. 10 A fast
6 A slow
FT
*
5
HS Mains switch
ST Limit thermostat
RT Control thermostat
EV External reset and lock out button
F Flame detector MZ 770 S
(IRD 1010, UVD 970 see separate diagram)
Z Ignition
M Burner motor
V1, V2 Oil solenoid valve
OV Oil preheater
FT Release thermostat oil preheater
* For burners without fuel heaters term.
4 and 6 have to be connected with a link
SA External lock out signal
L Air damper motor
ta Pre-heat-time oil preheater
tv1 Pre-purge and pre-ignition time
tlk LK-open command during pre-purge
tr LK-close movement
tf stray light monitoring
ts Lock out safety time
tn Post-ignition time
tv2 Delay terminal 6