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Building Technologies CC1N7130en
15.03.2018
Function
∂ Burner control is reset
∂ Reset button «EK1» or «EK2» not used
∂ 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 UN = AC 230 V) or AC 75 V (with UN = AC 120 V)
∂ Restart is initiated when mains voltage exceeds about AC 175 V (with UN = AC 230
V) or AC 95 V (with UN = AC 120 V)
If the oil preheater’s release contact does not close within 10 minutes, a non-alterable
lockout takes place.
After no more than 24 hours of continuous operation, the burner control will initiate
automatic controlled 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 state is also maintained in the case of mains failure.
Cause Response
Mains failure Restart
Voltage below undervoltage threshold Safety shutdown, followed by restart
Extraneous light during prepurge time (t1), 5
s before fuel valve (BV1) release
Non-alterable lockout at the end of the
prepurge time (t1)
Extraneous light during waiting time (tw) Start prevention, a non-alterable lockout
occurs after a maximum of 40 seconds
No flame at the end of safety time (TSA) Non-alterable lockout at the end of the
safety time (TSA), blink code 2, see
Control sequence
Loss of flame during operation Maximum of 3 repetitions, then a non-
alterable lockout occurs
Oil preheater’s release contact does not
close within 10 minutes
Non-alterable lockout
After a non-alterable lockout, a reset can be carried out immediately. Press and hold the
lockout reset button for about 1 second (<3 seconds). The LMO can be reset only when
all contacts in the line are closed and 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).
This means that several ignition attempts can be made during safety time (TSA) (see
Control sequence).
If the flame is lost during operation, a maximum of 3 repetitions can be carried out. If
the flame is lost for the fourth time during operation, the burner will initiate a non-
alterable lockout.
The repetition count is restarted each time controlled switching on by control thermostat
or pressurestat (R) takes place.
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
LMO14.113x2 and
LMO24.113x2
Limitation of repetitions
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