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Function
Preconditions for
startup
Undervoltage
Time supervision
oil preheater
Controlled intermittent
operation
Control sequence in
the event of fault
Resetting the
burner control
Ignition program with
LMO 64.302...
Limitation of repetitions
Postpurging
Building Technologies Division
Burner control is reset
Reset button
«EK1»
All contacts in the line are closed, heat demand
No undervoltage
Flame detector is darkened and there is no extraneous light
Safety shutdown from the operating position takes place should mains voltage drop
below about AC 165 V (with U
Restart is initiated when mains voltage exceeds about AC 175 V
(with U
= AC 230 V)
N
'
If the oil preheater
s release contact does not close within 10 minutes, a non-alterable
lockout takes place.
After 24 hours of continuous operation at the latest, the burner control will initiate
automatic safety shutdown followed by a restart.
If a non-alterable lockout occurs, the outputs for the fuel valves, the burner motor and the
ignition equipment are always immediately deactivated (<1 second).
In the event of a non-alterable lockout, the LMO remains locked and the red signal lamp
(LED) lights up permanently.
The burner control can immediately be reset.
This status is also maintained in the case of a mains failure.
Cause
Mains failure
Voltage below undervoltage threshold
Extraneous light during «t1», 5 s before
«BV1» release
Extraneous light during «tw»
No flame at the end of «TSA»
Flame is lost during operation
Oil preheater's release contact does not
close within 10 min.
After a non-alterable lockout, a reset can be carried out immediately.
To do this, press the lockout reset button for about 1 second (<3 seconds). The LMO...
can only be reset when all contacts in the line are closed and when there is no
undervoltage.
If the flame is lost during the safety time (TSA), the burner will be reignited before the
end of the safety time (TSA) at the latest. This means that several ignition attempts can
be made within the safety time (TSA), see Program sequence.
If the flame is lost during operation, a maximum of 3 repetitions can be carried out.
Each time the flame is lost during operation, a non-alterable lockout will be initiated.
The repetition count is restarted each time controlled switching on by «R» takes place.
Postpurging is only possible when the oil preheater contact is closed or when the wire
link between terminals 3 and 8 is fitted.
A demand for heat via «R» during postpurge time «t8», implicates an interruption of
postpurging, followed by new start.
or
«EK2»
not used
= AC 230 V)
N
Response
Restart
Safety shutdown, followed by restart
Non-alterable lockout at the end of the
prepurge time (t1)
Start prevention, a non-alterable lockout
occurs after a maximum of 40 seconds
Non-alterable lockout at the end of the
safety time (TSA), blink code 2, see Control
sequence
Maximum of 3 repetitions, then a non-
alterable lockout occurs
Non-alterable lockout
5/16
CC1N7138en
18.05.2016
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