Table of Contents
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Use, features
Use
Features
CC1N7101en
29.06.2006
Gas Burner Controls
Gas burner controls for the supervision of 1- or 2-stage gas burners of small to
medium capacity (typically up to 350 kW), in intermittent operation.
The LME... and this Data Sheet are intended for use by OEMs which integrate the
burner controls in their products.
LME... burner controls are used for the startup and supervision of 1- or 2-stage gas
burners in intermittent operation. The flame is supervised by an ionization probe or
flame detector QRA... with ancillary unit AGQ3... or blue–burning flames with blue-
flame detectors QRC...
In terms of housing dimensions, the LME... are identical with the LGB... and LMG...
burner controls (refer to «Type summary»).
Burner controls conforming to EN 298
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For gas burners with fans conforming to EN 676
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Undervoltage detection
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Air pressure supervision with functional check of the air pressure switch during
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startup and operation
Electrical remote reset facility
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Multicolor indication of fault status and operational status messages
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Limitation of the number of repetitions
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Accurate control sequence thanks to digital signal handling
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Controlled intermittent operation after 24 hours of continuous operation
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7
101
LME...
Building Technologies
HVAC Products
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Table of Contents
Related Manuals for Siemens LME11 series
Summary of Contents for Siemens LME11 series
- Page 1 Gas Burner Controls LME... Gas burner controls for the supervision of 1- or 2-stage gas burners of small to medium capacity (typically up to 350 kW), in intermittent operation. The LME… and this Data Sheet are intended for use by OEMs which integrate the burner controls in their products.
- Page 2 Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes should 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 •...
- Page 3 Installation notes • Always run the ignition cables separate from the unit and other cables while ob- serving the greatest possible distance • Do not mix up live and neutral conductors • Install switches, fuses, earthing, etc., in compliance with local regulations •...
- Page 4 Commissioning notes • When commissioning the plant for the first time or when doing maintenance work, make the following safety checks: Safety check to be carried out Anticipated response Burner startup with previously inter- LME11…: rupted line to the flame detector Max.
- Page 5 Mechanical design • LME... Units of plug-in design like their predecessor types LGB... and LMG... (refer to «Dimensions») • The housing is made of impact-proof, heat-resistant and flame-retarding plastic. It is of plug-in design and engages audibly in the base •...
- Page 6 Type summary (other types of burner controls on request) The type references given below apply to the LME… burner control without plug-in base and without flame detector. For ordering information on plug-in bases and other accessories, refer to «Ordering». Type Main Flame detector approx.
- Page 7 Type summary (other types of burner controls on request) [cont´d] t1´ Type Main Flame detector min. min. max. approx. approx. approx. approx. min. min. min. reference voltage replacing of Burner controls for atmospheric burners LME44.056A2 LGB41.255A27 Ionization probe AC 230 V (ION) or flame LME44.057A1 LGB41.258A17...
- Page 8 Ordering Gas burner control, without plug-in base refer to «Type summary» Connection accessories for small burner controls refer to Data Sheet N7201 Plug-in base AGK11... Cable holders AGK65..., AGK66, AGK67... Cable strain relief elements for AGK67... Connection accessories for small burner controls refer to Data Sheet N7203 Plug-in base AGK13...
- Page 9 Technical data General unit data Mains voltage AC 120 V +10 % / -15 % AC 230 V +10 % / -15 % Mains frequency 50...60 Hz ±6 % Power consumption 12 VA External primary fuse (Si) max. 10 A (slow) Mounting position optional Input current at terminal 12...
- Page 10 Technical data (cont´d) Flame supervision At mains voltage with ionization probe UN = AC 230 V ¹) Detector voltage between ionization probe and ground AC 115...240 V (AC voltmeter Ri ≥ 10 MΩ) Switching threshold (limit values): Switching on (flame on) (DC ammeter Ri ≤ 5 kΩ) ≥...
- Page 11 Technical data (cont´d) Flame supervision Mains voltage AC 230 V +10 % / -15 % 50...60 Hz ±6 % with AGQ3… and UV Mains frequency detector QRA... Perm. cable length from QRA... to AGQ3… max. 20 m (lay separate cable) Perm.
- Page 12 Technical data (cont´d) Flame supervision Detector current required Perm. detector current Possible detector current with QRC... (with flame) (without flame) with flame (typically) QRC... Min. 70 µA Max. 5.5 µA Max. 100 µA (only LME23…) The values given in the table above only apply under the following conditions: - Mains voltage AC 230 V - Ambient temperature 23 °C Green LED for opera-...
- Page 13 Functions • Preconditions for Burner control must be reset • burner startup All contacts in the line are closed, request for heat • No undervoltage • Air pressure switch «LP» must be in its no-load position or CPI or wire link 2 •...
- Page 14 Operation, indication, diagnostics Operation Lockout reset button «EK...» is the key operating element for resetting the burner control and for activating / deactivating the diagnostics func- tions. The multicolor signal lamp (LED) in the lockout reset button is the key Yellow indicating element for visual diagnostics and interface diagnostics.
- Page 15 Operation, indication, diagnostics (cont´d) Diagnostics of the cau- After lockout, the red fault signal lamp will remain steady on. In that condition, visual se of fault diagnostics of the cause of fault according to the error code table can be activated by pressing the lockout reset button for more than 3 seconds.
- Page 16 Connection diagram and control sequence LME11… µC control RESET K2/1 K2/2 R / W 7101a24e/0606 B´ SB / R W / GP 16/23 Building Technologies CC1N7101en HVAC Products 29.06.2006...
- Page 17 Connection diagram and control sequence LME21… µC control RESET K2/1 K2/2 R / W 7101a22e/0606 B´ SB / R W / GP (LR) BV2 7101d05/0206 Application examples only LME11… / LME21… / LME22… The suitable wiring schemes are merely examples which must be verified in the individual case depending on application! Burner without fan and without «LP»...
- Page 18 Application examples The suitable wiring schemes are merely examples which must be verified in the individual case depending on application! Control of actuators of 2-stage or 2-stage modulating 7101a09/0705 burners. Controlled prepurging «t1» with low-fire air volume. Same low-fire actuator position during startup and operation.
- Page 19 Connection diagram and control sequence LME22… / LME23… µC control RESET K2/1 K2/2 R / W Nur LME23... br bl 7101a02e/0606 B´ SB / R W / GP (LR) BV2 7101d02/0606 19/23 Building Technologies CC1N7101en HVAC Products 29.06.2006...
- Page 20 Application examples The suitable wiring schemes are merely examples which must be verified in the individual case depending on application! Control of actuators of 2-stage or 2-stage modulating burn- 7101a13/0804 ers. Controlled prepurging «t1» with nominal load air volume. For information about actuators «SA»: SQN3...: Refer to Data Sheet N7808 SB/R/W SQN7...: Refer to Data Sheet N7804...
- Page 21 Connection diagram and control sequence LME44… µA control RESET K2/1 K2/2 R / W 7101a20e/0606 B´ SB / R W / GP 7101d06/0206 t1´ 21/23 Building Technologies CC1N7101en HVAC Products 29.06.2006...
- Page 22 Legend AGK25... PTC resistor Error message (alarm) Burner Communication Interface BV... Fuel valve Closed Position Indicator Dbr... Wire link EK... Remote lockout reset button (internal) Remote lockout reset button Ionization probe Flame signal Flame signal amplifier Gas pressure switch Main switch Auxiliary contactor, relay Ionization probe K1...5...
- Page 23 Dimensions Dimensions in mm LME... 41,6 Ancillary unit AGQ3... Type Dimensions reference 90,5 AGQ3.1A27 69 6 AGQ3.2A27 7101m01/0804 © 2006 Siemens Building Technologies HVAC Products GmbH Subject to change! 23/23 Building Technologies CC1N7101en HVAC Products 29.06.2006...