7145 Oil Burner Control LMO44.255C2
Contents
1. the lockout reset button for about 1 second lt 3 seconds On On 8 blinks On Time supervision oil preheater o o o o o Oil preheater failed 5 times during prepurging ff 8 10 Siemens Building Technologies CC1N7145en HVAC Products 20 07 2004 Connection diagram and internal diagram Control sequence Rp A A B C D 2 Yel lt W Z es 1 EK1 lt ZN uC1 uC control uC2 pa SB a LED Teed OH e a a p 8 I n SEE t1 K4 y Z lt q M 7L eA gt PRT DTE DO O i i X Bvt YL ee fe 4 SB t4 z 8 Q X Bv2 A my mm gt 5 im OW H EK2 ORB CE m a S GE Z 7 gt 6 Ww OH BV2 X w TSA E gt FS JA an E rr TOY AT a A eT N QRC _ 7145d01 0504 12 Si 1 sw L M HZY D Bvt DTA Oa Al ae 7145a01e 0704 Legend AL Alarm device BV Fuel valve EK1 Lockout reset button EK2. 2 Remote lockout reset button FS Flame signal FSV Flame signal amplifier K Contacts of control relay kbr Cable link required only when no oil preheater is used LED 3 color signal lamp M Burner motor OW Release contact of oil preheater OH Oil preheater QRB Photoresistive flame detector QRC Blue flame detector bl blue br brown sw black R Control thermostat or pressurestat SB Safety limit thermostat Si External primary fuse W Limit thermostat or pressure switch Z Ignition transformer TSA Ignition safety time tw Waiting time t1 Prepurge time t1 Purge time t3 Preignition time t3n Postignition time t4 Interval from flame signal to release of BV2 A Start of startup sequence with burners using an OH A Start of startup sequence with burners using no OH B Time of flame establishment C Operating position D Controlled shutdown by R Control signals Required input signals A Perm input signals uC1 Microcontroller 1 uC2 Microcontroller 2 9 10 Siemens Building Technologies CC1N7145en HVAC Products 20 07 2004 Dimensions Dimensions in mm LM0O44 255C2 7145m01 0704 LMO044 255C2 with extension of lockout reset button AGK20 7145m02 0704 2004 Siemens Building Techn
3. Burner control is reset e All contacts in the line are closed and there is demand for heat e No undervoltage e Flame detector is darkened and there is no extraneous light e Safety shutdown from the operating position takes place should mains voltage drop below about AC 165 V UN AC 230 V e Restart is initiated when mains voltage exceeds about AC 175 V UN AC 230 V lf the oil preheater s release contact does not close within 10 minutes the burner control will initiate lockout After no more than 24 hours of continuous operation the burner control will initiate automatic controlled shutdown followed by a restart If lockout occurs the outputs for the fuel valves the burner motor and the ignition equipment will immediately be deactivated lt 1 second Voltage has fallen below the undervoltage Restart threshold Extraneous light during t1 Lockout at the end of t1 Extraneous light during tw Prevention of startup lockout after 40 sec onds at the latest No flame at the end of TSA Lockout at the end of TSA Loss of flame during operation Max 3 repetitions followed by lockout Oil preheater s release contact does not Lockout close within 10 minutes In the event of lockout the LMO44 255C2 remains locked and the red signal lamp LED will light up The burner control can immediately be reset This state is also maintained in the case of mains failure When lockout occurs the burner control can im
4. SIEMENS 7 Oil Burner Control LMO0O44 255C2 Microcontroller based oil burner control for the startup supervision and control of forced draft oil burners in intermittent operation Oil throughput above 30 kg h The LMO44 255C2 and this Data Sheet are intended for use by OEMs which inte grate the burner controls in their products Use features Use The LMO44 255C2 is designed for the startup and supervision of 1 or 2 stage forced draft oil burners in intermittent operation Yellow burning flames are supervised with photoresistive detectors QRB blue burning flames with blue flame detectors QRC In terms of housing dimensions electrical connections and flame detectors the LMO44 255C2 is identical with the LOA oil burner controls Oil burners with fans to EN 267 Burner controls for use with atomization oil burners of monoblock design to EN 230 LMO44 255C2 for use with stationary direct fired air heaters General features Undervoltage detection Electrical remote reset Bridging contact for oil preheater Monitoring of time for oil preheater Accurate and reproducible control sequence thanks to digital signal handling Controlled intermittent operation after 24 hours of continuous operation Limitation of the number of repetitions Multicolor indication of fault status and operational status messages CALOR SRL Str Progresului nr 30 40 sector 5 Bucuresti tel 021 411 44 44 fax 021 411 36 14 www calorserv ro www c
5. al documentation and the specification must be followed 3 10 Siemens Building Technologies CC1N7145en HVAC Products 20 07 2004 Ordering ef 4 10 Siemens Building Technologies HVAC Products Oil burner control without plug in base Electrical connections Plug in base AGK11 Cable holders AGK65 AGK66 AGK67 Cable strain relief elements for AGK67 Electrical connections Plug in base AGK13 Plug in housing AGK56 Cover AGK68 Flame detectors Photoresistive detectors QRB1 Blue flame detectors QRC1 Diagnostic tool Interface adapter OCI400 PC Windows software ACS400 Demo case For demonstrating the functions of burner controls Refer to User Manual B7989 Test adapter For checking the functions of burner controls on the burner With switch for manual startup of the burner With switch for simulating the oil preheater s release contact refer to Type summary refer to Data Sheet N7201 refer to Data Sheet N7203 refer to Data Sheet N7714 refer to Data Sheet N7716 refer to Data Sheet N7614 KF8891 KF8885 With 2 pairs of jacks for measuring the flame detector current Refer to Operating Instructions B7986 Test adapter For checking the functions of burner controls on the burner With signal lamps for program indication KF8833 With one pair of jacks for measuring the flame detector current For checking the functio
6. alor ro Warning notes A Mounting notes Installation notes To avoid injury to persons damage to property or the environment the following warning notes should 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 Before performing any wiring changes in the connection area of the LMO com pletely isolate the burner control from the mains supply all polar disconnection Ensure protection against electric shock hazard by providing adequate protection for the burner control s connection terminals Check to ensure that wiring is in an orderly state Press the lockout reset button operation button only manually applying a force of no more than 10 N without using any tools or pointed objects Fall or shock can adversely affect the safety functions Such units must not be put into operation even if they do not exhibit any damage Ensure that the relevant national safety regulations are complied with Always run the high voltage ignition cables separately while observing the greatest possible distances to the unit and to other cables Install switches fuses earthing etc in compliance with local regulations Ensure that the maximum permissible amperages will not be exceeded refer to Technical data Do not feed external mains voltage to the control outputs of the unit When testing the components controlled by t
7. he burner control fuel valves etc the LMO44 255C2 may never be plugged in Do not mix up live and neutral conductors Electrical connection of the flame detectors Commissioning notes HVAC Products lt is important to achieve practically disturbance and loss free signal transmission Never run the detector cable together with other cables Line capacitance reduces the magnitude of the flame signal Use a separate cable Observe the maximum permissible lengths of the detector cables refer to Techni cal data Prior to commissioning the plant check to ensure that wiring is in an orderly state When commissioning the plant or when doing maintenance work make the follow ing safety checks ened a posed to extraneous light seconds Burner operation with simulated loss of Repetition followed by lockout at flame for that purpose darken the flame the end of TSA detector during operation and maintain that state 20 07 2004 Standards and certificates Conformity to EEC directives Electromagnetic compatibility EMC immunity 89 336 EEC Low voltage directive 73 23 EEC OR ISO 9001 2000 ISO 14001 1996 Cert 00739 Cert 38233 Service notes e Each time a unit has been replaced check to ensure that wiring is in an orderly state and make the safety checks as described in Commissioning notes e Use the service adapters KF8885 KF8833 KF8840 for short periods of time only Disposal no
8. mediately be reset To do this press the lockout reset button for about 1 second lt 3 seconds The LMO44 255C2 can only be reset when all contacts in the line are closed and when there is no undervoltage If the flame is lost during operation a maximum of 3 repetitions can be made If the flame is lost for the fourth time during operation the burner will initiate lockout The repetition count is restarted each time controlled switching on by R takes place CC1N7145en 20 07 2004 Operation display diagnosis Operation Lockout reset button EK is the key operating element for resetting the burner control and for activating deactivating the diagnostic func tions 7145201 0504 Red The multicolor signal lamp LED in the lockout reset button is the key Yellow indicating element for both visual diagnostics and interface diagnostics Green 7145z02e 0704 LED Both EK and LED are located under the transparent cover of the lockout reset button There are 2 diagnostic choices 1 Visual diagnostics Operational status indication or diagnostics of the cause of fault 2 Interface diagnostics With the help of the interface adapter OCI400 and PC soft ware ACS400 or flue gas analyzers of different makes refer to Data Sheet N7614 Visual diagnostics In normal operation the different operational statuses are indicated in the form of color codes according to the color code table given below Interface diag
9. nostics is activated by pressing the lockout reset button for at least 3 seconds refer to Data Sheet N7614 lf by accident interface diagnostics has been activated in which case the slightly red light of the signal lamp flickers it can be deactivated by pressing again the lockout reset button for at least 3 seconds The instant of switching over is indicated by a yel low light pulse Operating position Operating position Visual diagnostics Interface diagnostics PC analyzer Color code table 7145203e 0704 Operational status During startup status indication takes place according to the following table indication Color code table for multicolor signal lamp LED Waiting time tw other waiting states Oil preheater on et ee Ignition phase ignition controlled amp 22 eo3 oedoedD Flashing yellow Operation flame o k Operation flame not o k z OOOOO0O0000 Flashing green Extraneous light on burner startup Y TOTA ADAODAOAOTD oo a red Fault alam alarm Error code output refer to Error code Soy AO AO AO fe red table Interface diagnostics AAAAAAAA Red flicker light Legend nets Steady on A Red Q Off Yellow O Green 7 10 Siemens Building Technologies CC1N7145en HVAC Products 20 07 2004 Diagnostics of the After lockout the red fault signal lamp remains steady on In that condition the visual cause of fault diagnostics of the cause of fault according to the er
10. ns of burner controls on the burner With signal lamps for program indication With on off switch for simulating the flame signal KF8840 With holes for checking the control voltages at the tabs of the burner control With one pair of jacks for measuring the flame detector s resistance Extension of lockout reset button Extension 19 mm Extension 43 mm Extension 55 mm AGK20 19 AGK20 43 AGK20 55 CC1N7145en 20 07 2004 Technical data General unit data Mains voltage AC 230 V 10 15 Mains frequency 50 60 Hz 6 External primary fuse Si 6 3 A slow Power consumption 12 VA Mounting orientation optional Weight approx 200 g Safety class I Degree of protection IP 40 to be ensured through mounting Perm cable lengths max 3 m at a line capacitance of 100 pF m Detector cable laid separately 20 m Remote reset laid separately 20 m Max perm current at cos gt 0 6 LMO44 255C2 Terminal 1 3 and 8 Terminals 4 5 and 10 Environmental Storage DIN EN 60 721 3 1 conditions Climatic conditions class 1K3 Mechanical conditions class 1M2 Temperature range 20 60 C Humidity lt 95 r h Transport DIN EN 60 721 3 2 Climatic conditions class 2K2 Mechanical conditions class 2M2 Temperature range 30 70 C Humidity lt 95 r h Operation DIN EN 60 721 3 3 Climatic conditions class 3K3 Mechanical conditions class 3M2 Temperature range 20 60 C Humidity lt 95 r h N Condensation forma
11. ologies CALOR SRL 10 10 AUDIE MO enange Str Progresului nr 30 40 sector 5 Bucuresti Siemens Building Technologies tel 021 411 44 44 fax 021 411 36 14 PNAS Procupis www calorserv ro www calor ro
12. ror code table can be activated by pressing the lockout reset button for more than 3 seconds Pressing the reset button again for at least 3 seconds the interface diagnostics will be activated for more de tailed information refer to Data Sheet N7614 The following sequence activates the diagnostics of the cause of fault ILI oco gt wW HH Lockout position Lockout position Lockout position Visual diagnostics Interface diagnostic On Flashing PC analyzer O Reset IL I 2 Error code table Let S gt 3s gt 3s y o lt 3s Le VA oO N Lo vt S Error code table signal lamp LED term 10 2 blinks On No establishment of flame at the end of TSA o o Faulty or soiled fuel valves Faulty or soiled flame detector Poor adjustment of burner no fuel Faulty ignition equipment 4 blinks Extraneous light on burner startup 5 blinks Free 7 blinks On Too many losses of flame during operation limi o 0o ooo tation of the number of repetitions Faulty or soiled fuel valves Faulty or soiled flame detector Poor adjustment of burner Any 10 blinks Wiring fault or internal fault output contacts During the time the cause of fault is diagnosed the control outputs are deactivated Burner remains shut down Fault status signal AL at terminal 10 according to the error code table The diagnostics of the cause of fault is quit and the burner switched on again by reset ting the burner control Press
13. tes The unit contains electrical and electronic components and may not be disposed of together with household waste Local and currently valid legislation must be observed Mechanical design The housing is made of impact proof heat resistant and flame retarding plastic lt is of plug in design and engages audibly in the base The housing accommodates the microcontroller for the control sequence and the control relays for load control electronic flame signal amplifier lockout reset button with its integrated 3 color signal lamp LED for operational status and fault status messages and the socket for connecting the interface adapter OCI400 Indication and diagnosis Multicolor indication of operational status and fault status messages Transmission of operational status and fault status messages and detailed service information via additional interface adapter OCI400 and PC Windows software ACS400 Type summary Type reference Mains Fuel Burner 1 Remote Comparable type of voltage valve capacity reset LOA stages Suited for direct fired air heaters LMO44 255B2 AC 230 V gt 30kg h LOA44 252A27 Legend TSAmax Maximum ignition safety time tw Waiting time t1 Prepurge time t1 Purge time t3 Preignition time t3n Postignition time t4 Interval from flame signal to release of BV2 1 Bridging contact for oil preheater 2 LMO can replace LOA but the instructions given in the Data Sheet other tech nic
14. tion of ice and ingress of water are not permitted Flame supervision with Min detector current Max perm detector Max possible detector QRB or QRC required current current with flame 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 Detector current in operation Detector current in operation tional status indication Flame signal instable Flame signal stable Green LED flashing Green LED steady on The values given in the table above only apply under the following conditions Mains voltage AC 230 V Ambient temperature 23 C 5 10 Siemens Building Technologies CC1N7145en HVAC Products 20 07 2004 Measuring circuit for detector current Function Preconditions for startup Undervoltage Time supervision oil preheater Controlled intermittent operation Control sequence in the event of fault Resetting the burner control Limitation of repetitions 6 10 Siemens Building Technologies HVAC Products 11 12 LMO 11 12 1 LMO bl sw 7145v01 0504 bl br Legend i Fa ADC DC microammeter with an internal pA DC uA DC resistance of Ri max 5 kQ bl Blue SW Black QRB QRC1 br Brown As an alternative to detector current measurement the diagnostic tool OCI400 ACS400 can be used In that case the DC microammeter is not required e
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