Siemens LGA41.153A27 Manual Download Page 7

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Building Technologies Division

CC1N7418en

21.06.2016

Accessories

(must be ordered separately)

Connection accessories
for small burner controls

Plug-in base

AGK11…

To connect the small-capacity burner controls to the burner
plant.
See Data Sheet N7201

Cable holders

AGK66…

Cable holder for plug-in base AGK11
See Data Sheet N7201

Cable holders

AGK65…

Cable holder for plug-in base AGK11
See Data Sheet N7201

Flame detector

Ionization probe

Supplied by thirds

Actuators

Actuator

SQN3...

See Data Sheet N7808

Actuator

SQN7...

See Data Sheet N7804

Actuator

SQN9...

See Data Sheet N7806

Others

RC unit

ARC 4 668 9066 0

Article no.:

BPZ:ARC466890660

For the supervision of ionization currents in networks with
nonearthed neutral conductor

Summary of Contents for LGA41.153A27

Page 1: ...are designed for startup and supervision of atmospheric gas burners in intermittent operation The flame is supervised with an ionization probe Burner controls for gas burners and gas units with or without fan to EN 298 1994 02 or EN 298 1993 Undervoltage detection Air pressure supervision with functional check of the air pressure switch during startup and operation LGA41 173A27 and LGA52 171B27 ar...

Page 2: ...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 Press the lockout reset button operating button 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 ri...

Page 3: ...ntact gap of at least 3 mm Secure the earthing lug in the terminal base with a metric screw and a lockwasher or similar Switches fuses earthing etc must be in compliance with local regulations primary fuse max 10 A slow Connect the gas pressure switch and controller whose contacts must be closed from startup to controlled shutdown in series with control thermostat or pressurestat R and limit therm...

Page 4: ...ed detector holders reduce the insulation resistance thus supporting creepage currents The burner as the counter electrode must be correctly earthed or else no ionization current will flow Since the burner bars form the earthed counter electrode the burner must be adjusted so that the flame is hot and stable and in firm contact with the burner bars With pulsating flames or yellow burning flames re...

Page 5: ...code to EN 298 Single stage A M C L X N 2 stage A T C L X N Life cycle Burner controls has a designed lifetime of 250 000 burner startup cycles which under normal operating conditions in heating mode correspond to approx 10 years of usage starting from the production date given on the type field This lifetime is based on the endurance tests in the standard EN 298 A summary of the conditions has be...

Page 6: ...nsures that the gas burner control will prevent burner startup or without releasing fuel lockout will be initiated Undervoltage threshold AC 178 V 10 V TSA Smaller tolerance band Flame signal amplifier Higher sensitivity for typical applications with pilot flames Type summary The type references given in the table refer to gas burner controls with no base and no accessories For ordering informatio...

Page 7: ...olders AGK66 Cable holder for plug in base AGK11 See Data Sheet N7201 Cable holders AGK65 Cable holder for plug in base AGK11 See Data Sheet N7201 Flame detector Ionization probe Supplied by thirds Actuators Actuator SQN3 See Data Sheet N7808 Actuator SQN7 See Data Sheet N7804 Actuator SQN9 See Data Sheet N7806 Others RC unit ARC 4 668 9066 0 Article no BPZ ARC466890660 For the supervision of ioni...

Page 8: ...l 9 Max 0 1 A Terminal 10 Max 1 A Cable length terminal 20 m at 100 pF m Weight Approx 180 g Storage DIN EN 60721 3 1 Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range 20 60 C Humidity 95 r h Transport DIN EN 60721 3 2 Climatic conditions Class 2K2 Mechanical conditions Class 2M2 Temperature range 50 60 C Humidity 95 r h Operation DIN EN 60721 3 3 Climatic conditions ...

Page 9: ...resence of a flame ionization current generates the flame signal which is fed to the input of the flame signal amplifier The amplifier is designed so that it only responds to the DC current component of the flame signal thereby ensuring that a short circuit between ionization probe and ground cannot simulate a flame signal since AC current would flow in this case Since the ionization current with ...

Page 10: ...hat if the mains voltage drops below approximately AC 165 V the burner startup will be prevented or a lockout will be triggered If the connections of live conductor terminal 12 and neutral conductor terminal 2 have been mixed up the burner control will initiate lockout at the end of the safety time TSA Times in seconds 1 AC 220 240 V LGA41 153A27 LGA41 173A27 LGA52 150B27 LGA52 171B27 LGA63 191A27...

Page 11: ... burner control can be reset after about 60 90 seconds After lockout the LGA will remain locked lockout cannot be changed This state will also be maintained in the event of power failures After lockout the burner control can be reset after 60 90 seconds also refer to Warning notes The conductivity and rectifying effect of hot flame gases are used for flame supervision For that purpose AC voltage i...

Page 12: ...he main valve BV2 will be energized If no flame signal is generated the flame relay does not open c d so that the bimetal will continue to be heated The bimetal thus continues to bend until tilting it actuates contact tz2 Lockout In the event of an erroneous premature flame signal the flame relay by means of its latch prevents e f from making which means no release of fuel TZ however still receive...

Page 13: ...nerated the flame relay does not open c d so that the bimetal will continue to be heated The bimetal thus continues to bend until tilting it actuates contact tz2 Lockout In the event of an erroneous premature flame signal the flame relay by means of its latch prevents e f from making which means no release of fuel TZ however still receives power so that the bimetal continues to bend until eventual...

Page 14: ...AL Fault status signal M Auxiliary fan BV Fuel valve R Thermostat or pressurestat ION Ionization probe SB Safety limit thermostat FR Flame relay Si External primary fuse FS Flame signal W Limit thermostat pressure switch LP Air pressure switch Z Ignition transformer H Main switch Required input signals 1 Not monitored to EN 298 Burner control s output signals A Commencement of startup sequence C O...

Page 15: ...s Division CC1N7418en 21 06 2016 Dimensions Dimensions in mm 5 5 62 5 88 91 41 5 47 62 5 7418m05 0305 22 9 LGA 2016 Siemens AG Building Technologies Division Berliner Ring 23 D 76437 Rastatt Subject to change Plug in base AGK11 ...

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