Green Led For Operational Status Indication; Measuring Circuit For Detector Current; Functions; Preconditions For Burner Startup - Siemens LME SERIES Installation Manuals
Burner controls for the supervision of 1- or 2-stage gas or gas / oil burners of
small to medium capacity, operation, with or without fan in intermittent
Table of Contents
Technical data (cont´d)
Flame supervision
with QRC...
(only LME23...)
Green LED for opera-
tional status indication
Measuring circuit for
detector current
Functions
Preconditions for
burner startup
LME41...
LME44...
Undervoltage
Controlled intermit-
tent operation
Reversed polarity
protection with
ionization
12/25
Building Technologies
HVAC Products
Detector current required
(with flame)
QRC...
Min. 70µA
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
QRC...
< 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
2
1
12
LME...
br
7101v02/1005
bl
sw
+
µA DC
QRC1...
As an alternative to detector current measurement, the OCI400 / ACS410 diagnostics
tool can be used. In that case, the DC microammeter is not required.
•
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
•
Restart is initiated when mains voltage exceeds about AC 90 V (at U
•
Safety shutdown from the operating position takes place should mains voltage drop
below about AC 175 V (at U
•
Restart is initiated when mains voltage exceeds about AC 185 V (at U
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».
Perm. detector current
(without flame)
Max. 5.5µA
Detector current in operation:
- Flame signal stable
- Green LED steady on
Legend
µA DC
DC microammeter with an internal resistance of
Ri = max. 5kΩ
bl
Blue
sw
Black
br
Brown
= AC 120 V)
N
= AC 230 V)
N
Possible detector current
with flame (typically)
Max. 100µA
> 45µA
= AC 120 V)
N
= AC 230 V)
N
CC1N7101en
27.11.2008
Hide quick links:
Table of Contents
