Honeywell satronic DMG 971 - Circuit and Timing Diagram DMG 971; IRD-OR UVD Connection; Block Diagram DMG 971

5
CIRCUIT AND TIMING DIAGRAM DMG 971
BLOCK DIAGRAM DMG 971
term. 8
term. 2
term. 9
blue
black
brown
IRD 1020
UVD 971
IRD- OR UVD CONNECTION
DMG 971
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 971 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
tlw max. reaction time for air proving switch
tv1 Supervised pre-purge time
tvz Pre-ignition time
tz Ignition time total
ts Safety time
tv2 Delay 2nd-stage
M
Ph
N
HS
ST
GW
RT
EV
IS
Z
V1
V2
SA
LW
1
2
3
4
5
6
7
8
9
C
A
B
SV
tvz
tz
ts
tv2
tw
tv1
tlw
rv1
rs
2 6 57 43C 9B 8 1 A
rz
rv2
Flame
amplifier
Reset
µC
Reset and
lock out
Power
supply
monitoring
RZ
RV1 RV2
RS
Fault display
Information
system
EEPROM
Oscillator
µC
Watchdog
Mains
monitoring
Power
supply
max. 10A fast
6A low
RLK