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Building Technologies
CC1N7101en
HVAC Products
27.11.2008
Technical data
(cont´d)
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 1.5µA
≤
DC 0.5µA
≥
DC 1.5µA
≤
DC 0.5µA
Detector current required for reliable operation
≥
DC 3µA
≥
DC 3µA
Switching threshold in the event of poor flame during operation
(LED flashes green)
Approx. DC 5µA
Approx. DC 5µA
Short-circuit current between ionization probe and ground
(AC ammeter Ri
≤
5 k
Ω
)
Max. AC 50...150µA
Max. AC 100...300µA
¹) For applications outside the European Community, operation at mains voltage
AC 120 V / AC 230 V ±10% is ensured
With the same quality of flame, the detector current with the LME… may be other
than with the LMG… / LGB…
Flame supervision with ionization is accomplished by making use of the conductivity
and rectifying effect of the flame. The flame signal amplifier only responds to the DC
current component of the flame signal. A short-circuit between ionization probe and
ground causes the burner to initiate lockout.
LME...
1
7101v01/0804
M
C
+
+
-
ION
Legend
C
Electrolytic capacitor 100...470µF; DC 10...25 V
ION Ionization probe
M
Microammeter, Ri max. 5000
Ω
For detector currents, refer to « Technical data ».
Flame supervision
with ionization probe
Note
Measuring circuit
