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CC1N7785en
20.11.2017
Burner Controls
Burner controls
For gas, oil or dual-fuel forced draft burners of medium to high capacity
For multistage or modulating burners in continuous operation
With air pressure supervision for checked air damper control.
Flame supervision
- LOK16: With silicon detector RAR
- LGK16: With flame detector QRA53/QRA55/ionization probe
Burner control for oil burners or gas burners in accordance with EN 298:2012
Suitable for use with air heaters (WLE)
With self-checking flame signal amplifier
The LOK16.../LGK16... and this Data Sheet are intended for use by OEMs which
integrate the burner controls in their products.
Building Technologies Division
7
785
LOK16...
LGK16...
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Related Manuals for Siemens LOK16 Series
Summary of Contents for Siemens LOK16 Series
- Page 1 Burner Controls LOK16... LGK16... Burner controls For gas, oil or dual-fuel forced draft burners of medium to high capacity For multistage or modulating burners in continuous operation With air pressure supervision for checked air damper control. Flame supervision - LOK16: With silicon detector RAR - LGK16: With flame detector QRA53/QRA55/ionization probe...
- Page 2 Burner controls type LOK16.../LGK16... feature a self-checking flame supervision circuit. The flame supervision circuit initiates the safety actions in the case of... : • ... premature or missing flame signal • ... any kind of fault on the flame detector, the detector cables or the flame signal amplifier that could simulate a flame signal during burner operation The burner controls are therefore suited for use in all types of oil- or gas-fired combustion plant where self-checking flame supervision systems are either mandatory...
- Page 3 Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! Do not open, interfere with or modify the unit! All activities (mounting, installation and service work, etc.) must be performed by qualified staff ...
- Page 4 Installation notes Always run the high-voltage ignition cables separately while observing the greatest possible distance to the unit and to other cables Neutral conductors must not be interchanged Install switches, fuses, earthing, etc., in compliance with local regulations ...
- Page 5 The electrical connections of the LMV5 and the PLL5 comply with the requirements of EN 60335-2-102. EAC Conformity mark (Eurasian Conformity mark) ISO 9001:2015 ISO 14001:2015 OHSAS 18001:2007 China RoHS Hazardous substances table: http://www.siemens.com/download?A6V10883536 5/28 Building Technologies Division CC1N7785en 20.11.2017...
- Page 6 Certified with plug-in base and flame detector: Type reference LOK16.140... LOK16.250... LOK16.650... LGK16.122... LGK16.133A17 LGK16.133A27 LGK16.322...
- Page 7 Type summary The type references given below apply to the LOK16 without plug-in base and without flame detector. For ordering information for plug-in bases and other accessories, see Accessories. Switching times are given in the order of the startup sequence, valid for 50 Hz mains frequency.
- Page 8 Type summary (cont’d) The type references given below apply to the LGK16 without plug-in base and without flame detector. For ordering information for plug-in bases and other accessories, see Accessories. LGK16... For flame supervision with flame detector QRA53.../QRA55... or ionization probe Preferred use: Flash-steam Flash-steam...
- Page 9 Accessories (to be ordered separately) Oil burner controls, without plug-in base For AC 230 V* Control sequence and Preferred use connection diagram like LAL2.14 Flash-steam generators LOK16.140A27* LAL2.25 Universal application LOK16.250A27* LAL2.65 Heavy-oil burners LOK16.650A27 For burner controls operating on AC 100...110 V, 50...60 Hz, the last 2 digits of the type reference read «17»...
- Page 10 Accessories (to be ordered separately) (cont‘d) Gas burner controls, without plug-in base For AC 230 V* Control sequence and Preferred use connection diagram like LFL1.122 Flash-steam generators LGK16.122A27* LFL1.133 Flash-steam generators LGK16.133A27 LFL1.322 Also suited for direct-fired LGK16.322A27* air heaters LFL1.333 LGK16.333A27* LFL1.335...
- Page 11 Accessories (to be ordered separately) (cont‘d) Actuator SQN7 Actuators Refer to Data Sheet N7804 Actuator SQN3/SQN4 Refer to Data Sheet N7808 Actuator SQM40... / SQM41 Refer to Data Sheet N7817 Actuator SQM5... Refer to Data Sheet N7815 Flame detector current measuring device KF8832 Others Article no.: BPZ:KF8832 ...
- Page 12 Technical data General unit data Mains voltage AC 230 V -15% / +10% LOK16.../LGK16... AC 100 V -15%...AC 110 V +10% Mains frequency 50...60 Hz ±6% Unit fuse, built-in T6,3H250V to DIN EN 60 127 Primary fuse (external) Max. 16 A (slow) Weight Approx.
- Page 13 Technical data (cont´d) Flame supervision LOK16... LGK16... RAR9... QRA5x.C... QRA5x.D... Ionization probe QRA5x.E... QRA5x.G... Operating voltage (Terminal 23 or 24) <DC 1 V AC 280 V ¹) AC 280 V ¹) AC 245 V ¹) ±10% ±10% ±10% ±10% Minimum detector current required DC 6 µA DC 35 µA DC 120 µA...
- Page 14 Detector current measurement (cont´d)) LGK16 The measuring device must be connected between terminal 24 and the detector electrode (+pole to terminal 24). With ionization DC 12...100 µA 7785v03/1008 Burner Burner control Terminals in Terminals in the the control panel burner compartment LGK16...
- Page 15 Function Principle of In contrast to conventional amplifiers, the signal delivered by the flame detector is self-supervision handled dynamically and not statically. The flame detector signal is converted to a sequence of control pulses and then fed to the flame relay circuit. The latter is designed such that the flame relay can only be energized by a flame signal of the described form.
- Page 16 Startup program Start When control thermostat or pressurestat closes, the burner control’s sequence switch starts running. At the same time, the fan motor connected to terminal 6 (only prepurging) receives power and, on completion of switch-on delay time, the fan motor or flue gas fan at terminal 7 (pre- and postpurging) also receives power. On completion of interval (t16), the control command to open the air damper is given via terminal 9.
- Page 17 Startup program (cont’d) Interrupted pilot burner with LGK16 (burners using a pilot burner) Short preignition time; followed by release of fuel for the pilot burner via terminal 17. t3‘ Note! (Only for LGK) For use in applications in dual-fuel burners or oil burners, the oil supply must be equipped with two shutoff valves connected in series.
- Page 18 Control sequence in the event of fault and indication of lockout In case of any disturbance, the supply of fuel will immediately be interrupted. At the same time, the sequence switch stops and thus the lockout indicator also. The symbol appearing above the reading mark indicates the kind of fault: ...
- Page 19 Control sequence in the event of fault and indication of lockout (cont´d) Lockout indication b´ b´ LOK16.140... LGK16.122... LGK16.322... LGK16.133... LOK16.250... LGK16.333... LOK16.650... LGK16.622... b´ 7785p02/0296 LGK16.335... LGK16.635... Startup sequence b-b´ With certain time variants: Idle steps of the sequence switch up to the self-shutdown after burner startup (b´...
- Page 20 Connection diagrams (for circuitry variants, see Connection examples) LOK16... 16 17 18 11 10 1(3) RAR9... 7785a01/0908 Note! In applications involving air heaters (WLE), or in the case of oil burners with a maximum throughput of > 30 kW/h, removing wire link B is not permitted. Caution! Do not press lockout reset button (EK...) for more than 10 seconds! Connect the safety valve as specified in the diagram provided by the burner...
- Page 21 Connection diagrams (for circuitry variants, see Connection examples) (cont’d) LGK16... 3 13 12 14 4 2 21 7 16 10 8 23 15 bv... 1(3) QRA5... 7785a02e/0604 TSA´, t3´, t4´, only: LGK16.335 and LGK16.635 1) When used in connection with QRA53.../QRA55..., earthing of terminal 22 is mandatory! Caution! Do not press lockout reset button (EK...) for more than 10 seconds! Connect the safety valve as specified in the diagram provided by the burner...
- Page 22 Connection diagrams (for circuitry variants, see Connection examples) LGK16... QRA5... XIII VIII 1(3) 7785a06/0305 Caution! Do not press lockout reset button (EK...) for more than 10 seconds! 1) When used in connection with QRA53.../QRA55..., earthing of terminal 22 is mandatory! LOK16...
- Page 23 Program sequence Control output LGK16... at terminal: VIII *t4´ *t3´ *TSA´ XIII 7785d03e/0805 Lockout indication position Times safety time (TSA´), long preignition time (t3´) and interval (t4´) are only programmed by burner controls LGK16.335... and LGK16.635... Control output LOK16... at terminal: t3´...
- Page 24 Program sequence (cont’d) Expanding flame burners (burners without a pilot burner), controlled and supervised by LOK16... or LGK16... Air damper in low-fire position during burner off times (min.). 100% min. 0... 7785d01/0901 Interrupted pilot burners (burners with pilot burner), controlled and supervised by LGK16.335 or LGK16.635, for example.
- Page 25 Connection examples 17 18 19 LGK16... Doubling of safety time with expanding flame burners when using burner control LGK16.335... or LGK16.635... By connecting terminals 17 and 18, the safety time is 7785a03/1295 doubled and the preignition time reduced by 50%. Before using this circuit, it must be ensured that the longer safety time is in compliance with national standards and regulations etc.
- Page 26 Legend End switch for the OPEN position of the air damper Remote lockout warning device (alarm) Main relay (load relay) with «ar» contacts Unit fuse Wire link (on the burner control’s base) Note! In applications involving air heaters (WLE), or in the case of oil burners with a maximum throughput of >...
- Page 27 Legend (cont’d) Lockout indication positions when there is no input signal (see Control sequence in the event of faults): ◄ No start ▲ Abortion of startup sequence ▼ Abortion of startup sequence ■ Lockout (fault in the flame supervision circuit) Lockout (no flame) Lockout (no flame) Lockout (no air pressure)
- Page 28 Dimensions Dimensions in mm LOK16.../LGK16... Plug-in base AGM17/AGM17.1 7785m04/0305 27,5 27,5 2017 Siemens AG Building Technologies Division, Berliner Ring 23, D-76437 Rastatt Subject to change! 28/28 Building Technologies Division CC1N7785en 20.11.2017...