10/23
Building Technologies
CC1N7101en
HVAC Products
29.06.2006
Technical data
(cont´d)
At mains voltage
UN = AC 230 V ¹)
Detector voltage between ionization probe and ground
(AC voltmeter Ri
≥
10 M
Ω
)
AC 115...240 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
Detector current required for reliable operation
≥
DC 3 µA
Switching threshold in the event of poor flame during operation
(LED flashes green)
Approx. DC 5 µA
Short-circuit current between ionization probe and ground
(AC ammeter Ri
≤
5 k
Ω
)
Max. AC 100...300 µA
¹) For applications outside the European Community, operation at mains voltage AC 230 V ±10 % is
ensured
With the same quality of flame, the detector current with the LME… may be an-
other than that 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...470 µF; 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
