3
SCHEMATIC CONNECTION DIAGRAM AND PROCESS DIAGRAM MMI 813.1
WITH AIR DAMPER CONTROL
term. 8
term. 2
term. 9
IRD
1020
MMI 813.1
WITHOUT AIR DAMPER CONTROL
IRD CONNECTION
SCHEMATIC DIAGRAM MMI 813.1
1
2
A/3
4
5
6
C
B
7
8
9
max. 10 A rapid
6 A slow
HS
IS
Z
M
L
V1
SA
LW
GW
ST
RT
Ph
tw tlw tv1 tlk tvz tz ts tv2
1
2
A/3
4
5
6
C
B
7
8
9
max. 10 A rapid
6 A slow
HS
GW
ST
RT
Ph
N
IS
Z
M
V2
V1
SA
LW
HS
Main switch
GW
Gas pressure switch
ST
Limit thermostat
RT
Control thermostat
IS
Ionization probe
Z
Ignition
M
Burner motor
V1
Solenoid valve 1st stage
V2
Solenoid valve 2nd stage
L
Air damper control unit
LW
Air pressure monitor
SA
External fault indication
tw
Waiting time at start-up
tlw
max. reaction time
of air pressure monitor
tv1
Pre-purge period
tlk
Air damper open signal
during pre-purge
tvz
Pre-ignition period
tz
Overall ignition period
ts
Safety period
tv2
Time delay terminal 6
blue
black
brown