Siemens LMG2 Series User Manual

Landis & Staefa Division CC1N7421E December 04, 1998 9/16
LMG21... / LMG25... LMG22...
A Start command (switching on by «R») B-B´ Interval for establishment of flame
C Operating position of burner reached C-D Burner operation
D Controlled shutdown by «R»
•
Burner is immediately shut down
•
Burner control is immediately ready
for new startup
AL Fault status signal (alarm) M Fan motor
BV... Fuel valve R Control thermostat / pressurestat
EK2 Remote reset button SA Actuators
FS Flame signal SB Safety limit thermostat
GP Gas pressure monitor W Limit thermostat / pressure monitor
LP Air pressure monitor Z Ignition transformer
LR Load controller
•
Burner control is reset
•
All contacts in the line are closed
•
Fan motor «M» or AGK25 is connected
•
Air pressure monitor «LP» is in idle position
•
No undervoltage
Safety shutdown in the event
–
the mains voltage is lower than typically AC 160 V
–
a restart is made when the mains voltage exceeds AC 195 V
After no more than 24 hours of continuous operation, the burner control initiates a safety
shutdown, followed by a restart.
If the connections of line (terminal 12) and neutral (terminal 2) have been exchanged,
the burner control will initiate lockout at the end of «TSA».
•
If a fault occurs, all outputs will immediately be deactivated (< 1 s)
•
On restoration of power, a restart will be made with the full program sequence
•
If the operating voltage drops below the undervoltage threshold (for threshold, refer to
«Functions»), a restart will be made with the full program sequence
•
If there is a premature faulty flame signal during «t1»
⇒
Lockout
•
If the contact of the air pressure monitor «LP» has welded in the working position:
prevention of startup and, after 8.5 seconds, lockout
•
If the contact of the air pressure monitor «LP» has welded in the idle position: lockout
at the end of «t10»
•
If there is no air pressure on completion of «t10»
⇒
Lockout
•
If the burner does not ignite by the end of «TSA»
⇒
Lockout
•
If flame is lost during operation
⇒
LMG21... / LMG22... lockout
⇒
LMG25... three repetitions
When lockout occurs, the burner control can immediately be reset! In that case, keep
lockout reset button depressed for a minimum of 0.5 seconds and a maximum of 3
seconds!
Functions
SB / R / W / GP
AL
M
LP
BV1
BV2
Z
FS
tw
t1
t3n
TSA
t4
7421d05/0498
t10
EK2
12
10
3
7
4
5
11
1
8
t3
A
B
B´
C
D
400 ms
SB / R / W / GP
AL
M
LP
SA
BV1
(LR) BV2
Z
FS
tw
t1
t3n
TSA
t4
7421d06/1098
t10+t11
t12
EK2
12
10
3
7
4
5
11
1
8
A
B
B´ C
D
9
400 ms
t3
Legend
Prerequisites for startup
Undervoltage
Checked intermittent
operation
Reversed polarity
protection
Control program in the
event of fault
Resetting the LMG2...

Siemens LMG2 Series Specifications

General

Brand	Siemens
Model	LMG2 Series
Category	Controller
Language	English