Advertisement
ISO 9001
Use
Landis & Staefa Division
Burner Controls
Burner controls for the supervision of single- or two-stage forced draught gas or
gas / oil burners of small to medium capacity (typically up to 350 kW) in
intermittent operation.
The burner controls are certified to EN 230 and EN 298.
They carry the CE mark based on the directives for gas appliances and
electromagnetic compatibility.
The LMG2... and this data sheet are intended for use by OEMs which integrate the
burner controls in their products.
Burner controls of the LMG2... range are used for startup and supervision of single- or
two-stage gas or gas / oil burners in intermittent operation.
The flame is supervised with a detector electrode or UV flame detector QRA... (with
ancillary unit AGQ2...A27).
LMG21... / LMG22... in the same housing replace burner controls LGB21... / LGB22...
(refer to «Type summary») and, with the help of the respective adapters, burner controls
LFI7... and LFM1... (refer to «Ordering»).
Application-specific features
– Detection of undervoltages
– Air pressure supervision with function check of air pressure monitor during startup
and operation
– Electric remote reset
– Indication of error code and flame signal by means of LEDs in the lockout reset button
– Precise program times thanks to digital processing of signals
Available versions
• LMG21... / LMG22...
• LMG25...
CC1N7421E
December 04, 1998
For unlimited burner capacities (output on startup ≤ 120 kW)
Locking in the event of loss of flame during operation
For burner capacities ≤ 120 kW
Three repetitions in the event of loss of flame during
operation
7
421
LMG2...
1/16
Advertisement
Table of Contents
Related Manuals for Siemens LMG2 Series
Summary of Contents for Siemens LMG2 Series
- Page 1 ISO 9001 Burner Controls LMG2... Burner controls for the supervision of single- or two-stage forced draught gas or gas / oil burners of small to medium capacity (typically up to 350 kW) in intermittent operation. The burner controls are certified to EN 230 and EN 298. They carry the CE mark based on the directives for gas appliances and electromagnetic compatibility.
-
Page 2: Warning Notes
Warning notes To avoid personal injury, damage to property or the environment, the following warning notes should be observed! • It is not permitted to open, interfere with or modify the unit! • Before performing any wiring changes in the connection area of the LMG2..., the burner control must be completely isolated from the mains supply! •... -
Page 3: Mechanical Design
Electrical connection of ionization current and UV It is important to achieve practically loss-free signal transmission detectors • Cable length may not exceed 20 m • Never run the detector cable together with other cables – Line capacitances reduce the magnitude of the flame signal –... -
Page 4: Type Summary
Type summary The type references contained in the following table refer to LMG2... with no plug-in base and with no flame detector. For ordering information on bases and other accessories, refer to «Ordering». Type of flame Type reference Behaviour in the detector LMG2... - Page 5 Ordering Burner control refer to «Type summary» Flame detectors – Detector electrode delivered by others – UV detector QRA... refer to data sheet 7714 Plug-in base with screw terminals AGK11 Cable gland holder AGK65 – For inserting in the plug-in base –...
-
Page 6: Technical Data
Technical data Operating voltage AC 230 V +10 % / -15 % Weight LMG2... - Burner control approx. 158 g Mains frequency 50 Hz -6 %...60 Hz +6 % - Plug-in base AGK11 approx. 80 g - AGK65... approx. 12 g Power consumption 12 VA - AGK66... - Page 7 Flame supervision with detector electrode At mains voltage U = AC 230 V Detector voltage across terminals 1 and 2 or ground AC 115...230 V (AC voltmeter Ri ≥ 10 MΩ) Switching thresholds (limit values) Switching on (flame on) DC ammeter, Ri ≤ 5 kΩ) ≥...
- Page 8 Flame supervision with Operating voltage AC 230 V +10 % / -15 % Max. permissible cable lengths AGQ2...A27 and UV QRA... to AGQ2...A27 20 m Mains frequency 50 Hz -6 %...60 Hz +6 % (separate cable) detector QRA... AGQ2...A27 to LMG2... 20 m Environmental conditions Transport...
- Page 9 Functions LMG21... / LMG25... LMG22... B´ B´ SB / R / W / G P S B / R / W / G P B V 1 B V2 B V 1 (L R ) B V 2 EK 2 t1 0 40 0 m s t3 n...
-
Page 10: Connection Diagram
Connection diagram LMG21... / LMG25... LM G 21.../25... ¹) Wire link required only with LGB21..., not with LMG21... / LMG25... R /W G P /S B B V 1 B V 2 E K 2 LM G 2... 7421a07/1098 Application examples Control of actuators of two-stage or two-stage modulating burners. - Page 11 Connection diagram LMG22... LM G22... R /W G P /S B B V 1 B V 2 E K 2 LM G 2... Application examples 742 1a1 9/1 098 Control of actuators of two-stage or two-stage modulating burners. Checked pre-purging «t1» with nominal load air volume. For information about actuators «SA»: S B /R /W B V 2...
- Page 12 Other application examples Burner without fan assistance and without «LP» Burner with fan control via auxiliary contactor «HS» with «LP» G P /S B A G K A G K 25 R /W 7421a04 /1098 7421 a05/03 98 * Note: different from LGB2... Legend AGK25...
-
Page 13: Operating Concept
Operating concept • Burner control has initiated lockout • Reset ⇒ Red fault LED on Press lockout reset button for 0.5...3 s • Diagnosis of cause of fault – Wait > 10 s – Press lockout reset button for > 3 s –... - Page 14 Interrogation of flame This function measures the flame establishment time with ionization supervision. establishment time With the AGQ2..., this function cannot be used. In the running position, the green flame signal LED is steady on. G re e n L E D o n The flame establishment time is read in the running position according to the following sequence: P re ss locko ut...
-
Page 15: Internal Diagram
Internal diagram LMG21... / LMG25... C ontrol of m icro co ntroller R E S E T A L re d F S gree n F S V E K 2 B V 2 B V 1 LMG22... C o n trol o f m icro co ntro ller R E S E T A L red F S gree n... - Page 16 Dimensions Dimensions in mm Burner control 4 1 ,5 Burner control with plug-in base AGK11... and TSA 3 sec. 1 2 V A IP40 C E - 0 0 8 5 A T 0 0 1 0 23 0 V ~ 5 0-60 H z cable gland holders AGK65...