Siemens LME11.330A2 - Flame Supervision and Operational Functions; Blue Flame QRC Detector Supervision; Burner Startup and Operation Functions

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Building Technologies CC1N7101en
HVAC Products 27.11.2008
Technical data (cont´d)
Detector current required
(with flame)
Perm. detector current
(without flame)
Possible detector current
with flame (typically)
QRC...
Min. 70µA Max. 5.5µA Max. 100µA
The values given in the table above only apply under the following conditions:
- Mains voltage AC 120 V / AC 230 V
- Ambient temperature 23°C
Detector current in operation:
- Flame signal instable
- Green LED flashing
Detector current in operation:
- Flame signal stable
- Green LED steady on
QRC...
< 45µA > 45µA
The values given in the table above only apply under the following conditions:
- Mains voltage AC 120 V / AC 230 V
- Ambient temperature 23°C
12
LME...
12
sw
bl
br
µA DC
+
QRC1...
7101v02/1005
Legend
µA DC DC microammeter with an internal resistance of
Ri = max. 5kΩ
bl Blue
sw Black
br Brown
As an alternative to detector current measurement, the OCI400 / ACS410 diagnostics
tool can be used. In that case, the DC microammeter is not required.
Functions
• Burner control must be reset
• All contacts in the line are closed, request for heat
• No undervoltage
• Air pressure switch «LP» must be in its no-load position
• Fan motor or AGK25 is closed (not at LME4...)
• Flame detector is darkened and there is no extraneous light
• Air pressure switch «LP» must be in its no-load position or DBR1
• CPI in no-load position or DBR2
• Safety shutdown from the operating position takes place should mains voltage drop
below about AC 85 V (at U
N = AC 120 V)
• Restart is initiated when mains voltage exceeds about AC 90 V (at U
N = AC 120 V)
• Safety shutdown from the operating position takes place should mains voltage drop
below about AC 175 V (at U
N = AC 230 V)
• Restart is initiated when mains voltage exceeds about AC 185 V (at U
N = AC 230 V)
After no more than 24 hours of continuous operation, the burner control will initiate
automatic controlled shutdown followed by a restart.
If the connections of live conductor (terminal 12) and neutral conductor (terminal 2) are
mixed up, the burner control will initiate lockout at the end of «TSA».
Flame supervision
with QRC...
(only LME23…)
Green LED for opera-
tional status indication
Measuring circuit for
detector current
Preconditions for
burner startup
LME41...
LME44...
Undervoltage
Controlled intermit-
tent operation
Reversed polarity
protection with
ionization