Building Technologies Division Infrastructure & Cities Sector

CC1N7101en
14.11.2011
Building Technologies Division
Infrastructure & Cities Sector
 
 
7101 
 
   
 
Burner controls LME...
 
Burner controls for the supervision of 1- or 2-stage gas or gas/oil burners of
small to medium capacity, with or without fan in intermittent operation.
 
The LME… and this Data Sheet are intended for use by OEMs which integrate the
burner controls in their products.
Use, features
LME… are used for the startup and supervision of 1- or 2-stage gas or gas/oil burners
in intermittent operation. The flame is supervised by an ionization probe or flame
detector QRA… with ancillary unit AGQ3…A27 for gas/oil forced draft burners or blue-
burning flames with blue-flame detectors QRC...
In terms of housing dimensions, the LME... are identical with the burner control LGB…
and LMG… burner controls (refer to Type summary).
-  For gas burners with or without fan to EN 298: 2003
-  For gas forced draft burners to EN 676
-  For oil burners to EN 230: 2005-10
 
-  Undervoltage detection
-  Air pressure supervision with functional check of the air pressure switch during
startup and operation
-  Electrical remote reset facility
-  Multicolor indication of fault status and operational status messages
-  Limitation of the number of repetitions
-  Accurate control sequence thanks to digital signal handling
-  Controlled intermittent operation after 24 hours of continuous operation
Use
Features 2/28
Building Technologies Division   CC1N7101en
Infrastructure & Cities Sector   14.11.2011
 

Note!
For supplementary documentation see Product Range Overview LME... (Q7101).
Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
 
Do not to open, interfere with or modify the unit!
 
 All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
 Before making any wiring changes in the connection area, completely isolate the
plant from mains supply (all-polar disconnection). Ensure that the plant cannot be
inadvertently switched on again and that it is indeed dead. If not observed, there is
a risk of electric shock hazard
 Ensure protection against electric shock hazard by providing adequate protection
for the connection terminals. If this is not observed, there is a risk of electric shock
 Press the lockout reset button/operation button of the LME... or the lockout reset
button extension AGK20… only manually (applying a force of no more than 
10 N) without using any tools or pointed objects. If this is not observed, there is a
risk of loss of safety functions and a risk of electric shock
 Fall or shock can adversely affect the safety functions. Such units must not be put
into operation, even if they do not exhibit any damage. If this is not observed, there
is a risk of loss of safety functions and a risk of electric shock
 Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring is in an orderly state and make the safety checks as
described in Commissioning notes. If this is not observed, there is a risk of loss of
safety functions and a risk of electric shock
Engineering notes
 When used in connection with actuators, there is no position feedback signal from
the actuator to the burner control
 When used in connection with actuators, the requirements of applicable norms and
regulations must be observed
 The running times of the actuators must match the burner control’s program. An
additional safety check of the burner together with the actuators is required
 When substituting LGB… or LMG… by LME…, the ancillary unit AGQ1… or
AGQ2… must be replaced by the AGQ3…A27
Mounting notes
 Ensure that the relevant national safety regulations are complied with 3/28
Building Technologies Division   CC1N7101en
Infrastructure & Cities Sector   14.11.2011
Installation notes
 Always run the high ignition voltage cables separate from the unit and other cables
while observing the greatest possible distance
 Do not mix up live and neutral conductors
 Install switches, fuses, earthing, etc., in compliance with local regulations
 The connection diagrams show the burner controls with earthed neutral conductor.
In networks with non-earthed neutral conductor and ionization current supervision,
terminal 2 must be connected to the earth conductor via an RC unit 
(ARC 4 668 9066 0). It must be made certain that local regulations are complied
with (e.g. protection against electric shock hazard) since AC 120 V (50/60 Hz) or
AC 230 V (50/60 Hz) mains voltage produces peak leakage currents of 2.7 mA
 Make certain that the maximum permissible current rating of the connection
terminals will not be exceeded
 Do not feed external mains voltage to the control outputs of the burner control.
When testing the devices controlled by the burner control (fuel valves, etc.), the
burner control must not be connected
 In the case of burners with no fan motor, an AGK25 must be connected to 
terminal 3 of the unit, or else the burner cannot reliably be started up
 Check the connecting lines of the air pressure switch for short-circuits (connection
terminals 3, 6 and 11). If this is not observed, there is a risk of loss of safety
functions
 For safety reasons, feed the neutral conductor to terminal 2. Connect the burner
components (fan, ignition transformer and fuel valves) to the neutral distributor as
shown below. The connection between neutral conductor and terminal 2 is
prewired in the base
5477