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Building Technologies
CC1N7106en
HVAC Products
20.02.2008
Technical data
(cont´d)
LME… burner controls have a designed lifetime* of 250,000 burner startup cycles which,
under normal operating conditions in heating mode, correspond to approx. 10 years of
usage (starting from the production date given on the type field). This lifetime is based on
the endurance tests specified in standard EN 298 and the table containing the relevant test
documentation as published by the European Association of Component Manufacturers
(Afecor) (www.afecor.org).
The designed lifetime is based on use of the burner controls according to the manufac-
turer’s Data Sheet and Basic Documentation. After reaching the designed lifetime in terms
of the number of burner startup cycles, or the respective time of usage, the burner control
is to be replaced by authorized personnel.
* The designed lifetime is not the warranty time specified in the Terms of Delivery
At mains voltage
UN = AC 120 V ¹)
UN = AC 230 V ¹)
Detector voltage between ionization probe and ground
(AC voltmeter Ri
≥
10 M
Ω
)
AC 50...120 V
AC 115...230 V
Switching threshold (limit values):
Switching on (flame on) (DC ammeter Ri
≤
5 k
Ω
)
Switching off (flame off) (DC ammeter Ri
≤
5 k
Ω
)
≥
DC 1.5 µA
≤
DC 0.5 µA
≥
DC 1.5 µA
≤
DC 0.5 µA
Detector current required for reliable operation
≥
DC 3 µA
≥
DC 3 µA
Switching threshold in the event of poor flame during operation
(LED flashes green)
Approx. DC 5 µA
Approx. DC 5 µA
Short-circuit current between ionization probe and ground
(AC ammeter Ri
≤
5 k
Ω
)
Max. AC50...150 µA
Max. AC 100...300 µA
¹) For applications outside the European Community, operation at mains voltage
AC 120 V / AC 230 V ±10% is ensured
Flame supervision with ionization probe is accomplished by making use of the conductivity
and rectifying effect of the flame. The flame signal amplifier only responds to the DC cur-
rent component of the flame signal. A short-circuit between ionization probe and ground
causes the burner to initiate lockout.
LME39...
1
7106v01/0405
M
C
+
+
-
ION
Legend
C
Electrolytic capacitor 100...470 µF; DC 10...25 V
ION Ionization probe
M
Microammeter, Ri max. 5,000
Ω
For detector currents, refer to «Technical data».
Life cycle
Flame supervision
with ionization probe
Measuring circuit
