Siemens LGA52.171B27 - Page 6

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Building Technologies Division CC1N7418en
21.06.2016
Mechanical design
The gas burner controls are of plug-in design, suitable for installation in any position on
burners, in control cabinets or on control panels.
The housing is made of impact-proof, heat resistant and flame-retarding plastic.
It is of plug-in design (measuring 91 x 62 x 63 mm, including the plug-in base) and
engages audibly in the plug-in base.
The color of plastic material of burner controls LGA are executed in black.
The housing accommodates the ...
- ... the thermal sequencing device (ambient temperature-compensated) acting on a
multiple snap action switching system,
- ... flame signal amplifier with the flame relay
- ... lockout reset button with its integrated signal lamp (splash-proof)
In the event mains voltage drops below about AC 165 V, an electronic circuit ensures
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 information for plug-in bases and other accessories, see Accessories.
Article no. Type Mains voltage
Burner with undervoltage detection Connection facility for auxiliary fan ¹) Connection facility for air pressure switch Control outputs for gas valves Reversed polarity protection
BPZ:LGA41.153A27
LGA41.153A27
A
C 220...240 V
--- ● ● 2 ●
BPZ:LGA52.150B17
LGA52.150B17
A
C 100...110 V
● 2 ●
BPZ:LGA41.173A27
LGA41.173A27
A
C 220...240 V
● 2 ●
BPZ:LGA52.150B27
LGA52.150B27
A
C 220...240 V
● 2 ●
BPZ:LGA52.171B27
LGA52.171B27
A
C 220...240 V
● ● ● 2 ●
BPZ:LGA63.191A27
LGA63.191A27
A
C 230 V
● ● ● 2 ●
1) Auxiliary fan not monitored to EN 298
Undervoltage detection
Only with
LGA63.191A27