Page 1 LMV37.4... Basic unit with integrated air-fuel ratio control for forced draft burners Basic Documentation The LMV37.4... and this Basic Documentation are intended for OEMs which integrate the units in their products! Software version V03.40 CC1P7546en Building Technologies Division 20.09.2013 Infrastructure & Cities Sector...
Page 2 2/235 Building Technologies Division Basic Documentation LMV37.4... CC1P7546en Industry Sector 20.09.2013...
Page 3 Supplementary documentation User Documentation Modbus AZL2................ A7541 Environmental Product Declaration LMV2… / LMV3..........E7541 Installation and Operating Instructions PC Software ACS410 ......... J7352 Data ‘Sheet LMV37.4..................... N7546 Product Range Overview LMV2… / LMV3............. Q7541 3/235 Building Technologies Division Basic Documentation LMV37.4...
Page 4 4/235 Building Technologies Division Basic Documentation LMV37.4... CC1P7546en Industry Sector 20.09.2013...
Page 5: Table Of Contents
Contents Safety notes ....................12 Warning notes ....................12 Mounting notes ....................13 Installation notes .................... 14 Electrical connection of the LMV37.4............15 Electrical connection of flame detectors ............16 Commissioning notes ..................16 Notes on settings and parameter settings ............. 18 Standards and certificates ................
Page 6 7.2.4 Flame intensity ....................37 7.2.5 Supervision of flame detector ................ 37 Digital inputs ....................38 7.3.1 Safety loop X3–04 pin 1 and 2 ............... 38 7.3.2 (Burner flange) X3–03, pin 1 and 2 ..............39 7.3.3 Input for external controller (ON / OFF) X5–03, pin 1 ........39 7.3.4 Inputs X5-03 pin 2 and 3 (Open / Close or stage 2 / stage 3) ......
Page 7 7.7.5 Light oil pilot ignition «Lo Gp» ............... 83 7.7.6 Heavy oil direct ignition «HO», «HO m. Umsp mod», «HO m. Umsp 2-stage» with separate circulation control ..............84 7.7.7 Heavy oil direct ignition «HO», «HO o. Umsp mod», «HO o. Umsp 2-stage», «HO o.
Page 8 11.1 Function principle ..................111 11.2 Definition of angles ..................111 11.3 Referencing ....................112 11.3.1 Reference travel ................... 113 11.4 Direction of rotation ..................115 11.5 Monitoring the actuator positions ..............116 11.6 Changing the error detection band for monitoring the actuator positions ..118 11.7 Forced travel ....................
Page 9 Connection and internal diagram ............137 Special feature: Burner identification (ID) ..........138 Connection to superposed systems ............138 17.1 General information and building automation functions ......138 17.2 Modbus ......................140 PC software ACS410 ................. 141 Error history ....................142 19.1 Error classes ....................
Page 10 25.1 Display of info level ..................161 25.2 Display of info values (examples) ..............161 25.2.1 Identification date ..................161 25.2.2 Identification number ..................161 25.2.3 Burner identification ..................162 25.2.4 Number of startups resettable ..............162 25.2.5 Total number of startups ................163 25.2.6 End of info level ...................
Page 11 27.11.10 Setting of curvepoints for multistage mode («Lo 2-stage», «Lo 3-stage», «Ho 2-stage» and «Ho 3-stage») ................ 198 27.11.11 Warm settings for «Lo 2-stage», «Lo 3-stage», «Ho 2-stage» and «Ho 3- stage» ......................199 27.11.12 Cold settings for multistage mode («Lo 2-stage», «Lo 3-stage», «Ho 2-stage» and «Ho 3-stage») ..................
Page 12: Safety Notes
To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! LMV37.4... are safety devices! Do not open, interfere with or modify the units. Siemens does not assume responsibility for damage resulting from unauthorized interference! The chapters covering the LMV37.4... contain additional warning notes which...
Page 13: Mounting Notes
To ensure safety and reliability of the LMV37.4... system, the following points must also be observed: Condensation and ingress of humidity must be avoided. Should such conditions occur, make sure that the unit is completed dry before switching on again! Static charges must be avoided since they can damage the unit’s electronic components when touched.
Page 14: Installation Notes
Installation notes  Always run the high-voltage ignition cables separate from the unit and other cables while observing the greatest possible distances  Ensure that the electrical wiring inside the boiler is in compliance with national and local safety regulations ...
Page 15: Electrical Connection Of The Lmv37.4
1.4 Electrical connection of the LMV37.4... The LMV37.4... operates with the following low-voltages:  SELV (Safety Extra Low-Voltage) and PELV (Protective Extra Low-Voltage) ensure protection against electric shock hazard  FELV (Functional Extra Low-Voltage) without safe separation offers no protection which, in the event of fault, would not exclude risks Mains voltage Mains voltage...
Page 16: Electrical Connection Of Flame Detectors
Electrical connection of flame detectors It is important to achieve practically disturbance- and loss-free signal transmission:  Never run the detector cables together with other cables – Line capacitance reduces the magnitude of the flame signal – Use a separate cable ...
Page 17 The functions of the following available or required input status signals must be checked:  Air pressure  Minimum gas pressure / maximum gas pressure or POC  Gas pressure valve proving  Minimum oil pressure and maximum oil pressure ...
Page 18: Notes On Settings And Parameter Settings
A password protects the parameter level against unauthorized access. The OEM allocates individual passwords to the setting levels he can access. The default passwords used by Siemens must be changed by the OEM. These passwords are confidential and may only be given to persons authorized to access such setting levels ...
Page 19: Standards And Certificates
● LMV37.420A1 Service notes  If fuses are blown, the unit must be returned to Siemens (refer to chapter Warning notes) 1.10 Life cycle The burner management system LMV3… has a designed lifetime* of 250,000 burner startup cycles which, under normal operating conditions in heating mode, correspond to approx.
Page 20: System Structure/Function Description
System structure/function description The LMV37.4... is a microprocessor-based burner management system with matching system components for the control and supervision of forced draft burners of medium to high capacity. Integrated in the basic unit of the LMV37.4... are:  Burner management system complete with valve proving system ...
Page 21: General Information
2.3 General information The burner management system is operated and parameterized either via the AZL2… display and operating unit or with the help of the PC software. The AZL2… with LCD and menu-driven operation facilitates straightforward use and targeted diagnostics. When making diagnostics, the display shows the operating states, the type of error and the point in time the error occurred.
Page 22: Technical Data
Technical Data 4.1 Basic unit LMV37.4... Mains voltage - LMV37.400A1, LMV37.420A1 AC 120 V -15 % / +10 % - LMV37.400A2 AC 230 V -15 % / +10 % Mains frequency 50 / 60 Hz ±6 % Power consumption <30 W (typically) Safety class I, with parts according to II and III to DIN EN 60730-1...
Page 23: Terminal Loading "Outputs
4.1.2 Terminal loading «Outputs» Total contact loading:  Rated voltage - LMV37.400A1, LMV37.420A1 AC 120 V, 50 / 60 Hz - LMV37.400A2 AC 230 V, 50 / 60 Hz  Unit input current (safety loop) from: Max. 5 A - Fan motor contactor - Ignition transformer - Valves - Oil pump / magnetic clutch...
Page 24 Individual contact loading: Fan motor contactor  Rated voltage - LMV37.400A1, LMV37.420A1 AC 120 V, 50 / 60 Hz - LMV37.400A2 AC 230 V, 50 / 60 Hz  Rated current - LMV37.400A1, LMV37.420A1 - LMV37.400A2 1,6 A pilot duty load declaration to UL372 ...
Page 25: Analog Output / Load Output X74 Pin 3
4.1.3 Analog output / load output X74 pin 3 Accuracy of output voltage ±1% 4.1.4 Cable lengths  Mains line AC 120 V / AC 230 V Max. 100 m (100 pF/m)  Display, BCI For installation under the burner hood or in the control panel Max.
Page 26: Signal Cable Agv50
4.2 Signal cable AGV50... from AZL2...  BCI Signal cable Color white Unshielded Conductor 4 x 0.141 mm² With RJ11 plug Cable length - AGV50.100 - AGV50.300 Supplier Recommended: Hütter http://www.huetter.co.at/telefonkabel.htm Order number: on request Location Under the burner hood (extra measures required for SKII EN 60730-1) 4.3 Environmental conditions Storage...
Page 27: Flame Detector
4.4 Flame detector 4.4.1 Ionization probe For continuous operation! No-load voltage at ION terminal Approx. U Mains (X10–05 pin 2) Caution! Protect the ionization probe against electric shock hazard! Short-circuit current Max. AC 1 mA Required detector current Min. DC 4 µA, flame display approx. 30% Possible detector current Max.
Page 28 Measuring circuit for Ionization probe detector current measurement Legend LMV... Electrolytic capacitor 100...470 µF; DC 10...25 V X10-05/2 Ionization probe Microammeter Ri max. 5000  X10-05/1 28/235 Building Technologies Division Basic documentation LMV37.4... CC1P7546en Industry Sector 4 Technical Data 20.09.2013...
Page 29: Uv Flame Detectors Qra2 / Qra4 / Qra10
4.4.2 UV flame detectors QRA2 / QRA4 / QRA10 Caution! If flame detectors QRA2 / QRA4 / QRA10 are used for flame supervision with the LMV37.4..., it must be ensured that the basic unit is permanently connected to power (conforming to EN 230 / EN 298), thus enabling the system to detect flame detector failures during startup and shutdown.
Page 30: Photoresistive Flame Detectors Qrb
4.4.3 Photoresistive flame detectors QRB… No-load voltage at QRB... terminal Approx. DC 5 V (X10–05 pin 3) Max. perm. length of QRB... detector 3 m (wire – wire 100 pF/m) cable (laid separately)  Note A detector resistance of RF <500  is identified as a short-circuit and leads to safety shutdown in operation as if the flame had been lost.
Page 31: Blue-Flame Detectors Qrc
4.4.4 Blue-flame detectors QRC… Check the intensity of flame with the AZL2... For system-specific reasons, the display of maximum flame intensity by the AZL2... is limited to approx. 55 %. Caution! Flame detectors QRC… are only suited for AC 230 V operation. Threshold values when flame is supervised by QRC...: - Start prevention (extraneous light) Intensity of flame (parameter 954) ≥10%...
Page 32: Dimensions
Dimensions 5.1 LMV37.4... Dimensions in mm 82,5 22,8 17,3 10,2 12,5 23,5 7546m02/0307 27,2 82,5 128,5 Figure 6: Dimension LMV37.4... 32/235 Building Technologies Division Basic documentation LMV37.4... CC1P7546en Industry Sector 5 Dimensions 20.09.2013...
Page 33: Display And Diagnostics
Display and diagnostics Transmission of operating states, fault status messages and detailed service information via: - BCI communication via integrated RJ11 jack to the AZL2... display and operating unit, or via additional OCI410… interface to ACS410 PC software Communication / parameterization AZL2…...
Page 34: Basic Unit
Basic unit 7.1 Description of inputs and outputs This chapter covers the key features of the basic unit’s inputs and outputs. For exact use of the inputs and the activation of outputs, refer to chapter Sequence diagrams. LMV... Flame signal input and flame detector X10–05 and X10–06 QRB...
Page 35: Flame Detectors
7.2 Flame detectors  For display of the flame on the AZL2…, the following general conditions apply: Display is subject to various component tolerances, which means that deviations of 10% can occur Note that, for physical reasons, there is no linear relationship between flame display and detector signal values The LMV37.4...
Page 36: Loss Of Flame
7.2.1 Loss of flame In the event of loss of flame, the unit initiates safety shutdown, followed by a restart, if required. A repetition counter can be used to select the number of flame losses after which the unit shall initiate lockout (refer to chapter Repetition counter). Error Diagnostic Meaning for the LMV37.4...
Page 37: Extraneous Light
7.2.2 Extraneous light Extraneous light in standby mode (phase 12) leads to start prevention, followed by a restart. Extraneous light during the prepurge phase results in immediate lockout. If extraneous light occurs during the shutdown phase, the system switches to the safety phase.
Page 38: Digital Inputs
7.3 Digital inputs 7.3.1 Safety loop X3–04 pin 1 and 2 Input for connection of the safety loop. When any of the series-connected contacts included in the loop opens, power supply to the fuel valves, the fan and the ignition equipment is instantly cut.
Page 39: (Burner Flange) X3-03, Pin 1 And 2
7.3.2 (Burner flange) X3–03, pin 1 and 2 End switch burner flange (component of safety loop). LMV... Flange “L” for end switch burner flange End switch burner flange (component of safety loop) Bild 274e/1010 Figure 10: Burner flange X3-03 For error diagnostics and parameters, refer to chapter Safety loop. 7.3.3 Input for external controller (ON / OFF) X5–03, pin 1 When the external control loop is closed, the internal input message «Heat request»...
Page 40: Air Pressure Switch (Aps) X3-02
7.3.5 Air pressure switch (APS) X3–02 Input for connection of an air pressure switch. Air pressure is anticipated when the fan is switched on. If there is no air pressure signal, the system initiates lockout. The air pressure switch must have an NO contact. If no air pressure switch is required (e.g.
Page 41: Gas Pressure Switch Valve Proving (P Lt) - Or Heavy Oil Direct Start X9-04
7.3.6 Gas pressure switch valve proving (P LT) – or heavy oil direct start X9-04 Input for connection of Pressure switch valve proving (P LT) X9-04. The input is active only when operating on gas and when valve proving is activated (refer to chapter Program sequence).
Page 42 Heavy oil direct start When firing on heavy oil, input X9-04 is used for the heavy oil direct start signal. Parameter 286 can be used to define the time of the evaluation; parameter 287 to define the maximum waiting time for heavy oil circulation. Parameter Oil: Evaluation of heavy oil direct start 0 = only start signal in phase 38...
Page 43 7.3.7 Gas / oil pressure switch-min (Pmin), start release gas X5–01 Input for connection of a pressure switch-min for gas or oil: If the plant does not require a pressure switch-min, a wire link must be fitted between pin 2 and 3. Gas pressure switch-min In all types of gas trains, minimum gas pressure is expected from phase 22.
Page 44: Setting The Time For Making The Pressure Switch Test
Start release gas If, at the same time, the input is used as a start release input (e.g. for an air supply damper), it can be connected in series with the pressure switch. When selecting Valve proving via pressure switch-min (parameter 236), function Start release gas is not supported.
Page 45: Gas / Oil Pressure Switch-Max (Pmax) / Or Poc Contact, Start Release Oil X5-02
7.3.9 Gas / oil pressure switch-max (Pmax) / or POC contact, start release oil X5–02 Input for connection of a pressure switch-max for gas or oil: The pressure switch must have an NC contact, which means that the contact opens when the adjusted maximum pressure is exceeded.
Page 46 Oil pressure switch-max In all types of oil trains, the maximum oil pressure is monitored from phase 22. If the maximum oil pressure is exceeded after the maximum time (parameter 214) has elapsed, or during the subsequent phases, the system initiates lockout. Parameter Max.
Page 47: Reset X8-04, Pin 1
7.3.10 Reset X8-04, pin 1 Input for connection of a reset button. The basic unit can be reset or manually locked via this input (refer to chapter Reset / manual locking). Resetting / manual interlocking Bild 393e/1109 Figure 17: Reset X8-04 47/235 Building Technologies Division Basic documentation LMV37.4...
Page 48: Digital Outputs
7.4 Digital outputs Safety-related outputs, type SI Using a contact feedback network (CFN), these contacts are read back by the microcomputers and checked for their correct positions. Non-safety-related outputs, type No-SI These outputs are not monitored by the contact feedback network (CFN) and, for this reason, can only be used for non-safety-related actuators, or actuators made safe in some other form (e.g.
Page 49: Output Ignition (Z) Type Si (Ignition) X4-02
7.4.4 Output ignition (Z) type SI (IGNITION) X4–02 LMV... Ignition (Z) Protective earth (PE) Bild 285e/0409 Figure 21: Output ignition (Z) X4-02 Output for the connection of ignition transformers or electronic ignition modules. When firing on gas, ignition is switched on in phase 38 just before reaching safety time 1 (TSA1).
Page 50: Outputs Fuel Valves Type Si (V1
7.4.5 Outputs fuel valves type SI (V1...V3 / PV) X8–02, X7-01, X7-02 LMV... Protective earth (PE) Auxiliary terminal V1 for series connection of two AC 115 V valves Fuel valve 1 (V1) Bild 286e/0409 Figure 22: Output fuel valve (V1) X8-02 LMV...
Page 51: Program Sequence
7.5 Program sequence The program sequence is shown in the form of sequence diagrams (refer to chapter Fuel trains). Using a number of parameters, the program sequence can be adapted to the respective application. 7.5.1 Time parameters Using a number of time parameters, the time characteristics of the different types of fuel trains can be matched to the requirements of the respective application.
Page 52: Valve Proving
7.5.2 Valve proving Valve proving is only active when firing on gas. Valve proving designed to detect leaking gas valves and, if necessary, to prevent the valves from opening or ignition from being switched on. Lockout is initiated, if required. When performing valve proving, the gas valve on the burner side is opened first to bring the test space to atmospheric pressure.
Page 53: Valve Proving With Separate Pressure Switch (P Lt) X9-04
It must be ensured that the 2 test times are correctly set. It is to be checked whether the gas required for the test may be fed into the combustion chamber (on the relevant application). The test times are safety-related. After a reset and in the case of aborted or prevented valve proving, the unit performs valve proving on the next startup (only when valve proving is activated).
Page 54: Valve Proving Via Gas Pressure Switch-Min X5-01
7.5.2.2. Valve proving via gas pressure switch-min X5-01 Step 1: t80 – evacuation of test space. P LT (Pmin) Gas valve on the burner side is opened to bring the test space to atmospheric pressure. Step 2: t81 – atmospheric pressure test. When the gas has closed, the gas pressure in the test space must not exceed a certain level.
Page 55: Safety Phase (Phase 01)
7.5.2.4. Safety phase (phase 01) The safety phase is an intermediate phase which is completed prior to triggering lockout. The relays of the fuel valves and the safety relay (fan) are deenergized, but lockout does not yet take place. The alarm relay is not yet activated. If possible or permitted, safety checks or repetition counter checks are made whose results decide on the transition to Lockout phase or Standby.
Page 56: Special Functions During The Program Sequence
7.5.3 Special functions during the program sequence 7.5.3.1. Reset / manual lockout The system can be manually locked by simultaneously pressing the Info button and any other button on the AZL2... This function enables the operator to lock the system from any of the operating levels or, in other words, to trigger non-volatile lockout.
Page 57: Alarm Upon Start Prevention
Resetting via the PC software Refer to the documentation covering the PC software (J7352). Error Diagnostic Meaning for the LMV37.4... system code code Manual lockout by PC software 7.5.3.2. Alarm upon start prevention If start prevention occurs, it is shown on the display of the AZL2... Start prevention takes place only when a heat request is delivered and when one of the startup criteria is not fulfilled.
Page 58: Possible Start Preventions
7.5.3.3. Possible start preventions On the normal display, error code 201 is translated to text display OFF UPr (UPr = unprogrammiert = not programmed); the numerical value appears in the error history. Error Diagnostic Meaning for the LMV37.4... system code code No operating mode selected OFF UPr...
Page 59 Functions with adjustable repetition counter Parameter Repetition limit no flame at the end of safety time (TSA) 1 = no repetition 2...4 = 1...3 repetitions Recharging time: Entering into operation Repetition limit heavy oil direct start 1 = no repetition 2...15 = 1...14 number of repetitions 16 = constant repetition Recharging time:...
Page 60 Error Diagnostic Meaning for the LMV37.4... system code code No flame at the end of safety time (TSA1) Air pressure Loss of flame Pressure switch-min (Pmin) No min. gas / oil pressure Safety loop / burner flange open OFF S Heavy oil direct start If the adjustable repetition counter limits are changed, the actual counter is recharged only when the associated recharging time is reached: After power-on or after a reset.
Page 61: Start Without Prepurging (As Per En 676)
7.5.3.5. Start without prepurging (as per EN 676) When using valve proving and 2 fuel valves of class A, prepurging is not required (conforming to EN 676). Prepurging can be deactivated per parameter. Parameter Gas: Prepurging 0 = deactivated 1 = activated When prepurging is activated, it is performed in accordance with the adjusted prepurge time.
Page 62: Program Stop Function
7.5.3.7. Program stop function To simplify the burner settings in connection with commissioning and service work, the program sequence of the LMV37.4... can be stopped at the following positions: 1) Air damper in prepurge position 2) Ignition position 3) Interval 1 4) Interval 2 The program stops are integrated in the setting sequence when the plant is commissioned (refer to chapter Air-fuel ratio curves –...
Page 63: Continuous Fan
7.5.3.10. Continuous fan With burners that can be damaged by heat (e.g. several burners using the same combustion chamber), continuous purging may be required. In that case, the fan operates continuously in all phases. For that purpose, the fan motor contactor is to be connected to X3-05, pin 3, tapped after the unit fuse and the safety loop.
Page 64: Test Function For Approval Of Burner - Loss-Of-Flame Test (Tüv Test)
7.5.3.11. Test function for approval of burner – loss-of-flame test (TÜV test) The purpose of this test is to verify the detection time required in the event of loss of flame when applying for burner approval. When starting the test, the fuel valves are shut to determine the time (resolution of 0.2 seconds) until the basic unit detects loss of flame.
Page 65: Purging In The Lockout Position
When the Purging in the lockout position function is used, the fan may only be powered via a contactor and must not be connected directly to LMV37.4 (X3-05 pin 1)! Siemens Micromaster 440 Standardization of speed X74 pin 1 DC 24 V external +24 V X74 pin 3 VSD control DC 0/1...10 V...
Page 66: Switching Back To Pilot
7.5.3.13. Switching back to pilot The function must be selected with parameter 191. This deactivates the OPEN / CLOSE load controller contacts (X5-03 pin 2 or 3). Contact X5-03 pin 2 is evaluated as the input signal for Switching back to pilot. The function can be started either by a low or high signal.
Page 67 The restarts from the pilot waiting phase are counted in the startup counter (parameter 176). Parameter Switching back to pilot switching cycles RWF40 / RWF55 application examples: The setting must be set to low active to use the RWF40 / RWF55. The controller ON signal (X5-03 pin 1 / pin 4) is applied at RWF40 (contacts Q13 and Q14) or at RWF55 (contacts 1P and 1N).
Page 68 The Switching back to pilot function is active in the marked temperature zone. If the temperature increases above the ON threshold, the Switching back to pilot function is activated. The main flame is shut down at the same time. If the temperature decreases in the direction of the setpoint, the Switching back to pilot function remains active until the temperature falls below the OFF threshold.
Page 69: Fuel Trains (Application Examples)
7.6 Fuel trains (application examples) Gas direct ignition (Operating mode 1, 7, 14, 19) Program Direct ignition Figure 33: Gas direct ignition Gas pilot ignition 1 (Operating mode 2, 8, 15, 20) Program Gas pilot Figure 34: Gas pilot ignition 1 Gas pilot ignition 2 (Operating mode 3, 9, 16, 21) Program...
Page 70 Fuel valve control program Gas (always modulate) Legend for fuel trains: Not used For the valve proving function, the pressure switch-min (Pmin) is located between the fuel valve (V1 / V2) Heavy oil) Light oil Normally Open P LT Valve proving Pmax Pressure switch-max Pmin Pressure switch-min Pilot valve...
Page 71 Light oil direct ignition, multistage (Operating mode 5, 17) 1-stage burner Program 7546s04e/1107 Figure 37: Light oil direct ignition, multistage (Operating mode 5, 17) 2-stage burner Program 7546s05e/1107 Figure 38: Light oil direct ignition, 2-stage (Operating mode 6, 18) 3-stage burner Program 7546s06e/1107 Figure 39: Light oil direct ignition, 3-stage...
Page 72 Light oil direct ignition, modulating (Operating mode 4, 22) Modulating burner (without shutdown facility for adjustable head) Program 7546s07e/1107 Figure 40: Light oil direct ignition, modulating (Operating mode 4, 22) Modulating burner (with shutdown facility for adjustable head) Program 7546s08e/1107 Figure 41: Light oil ignition, modulating Fuel valve control program Light oil (transformer for direct ignition) and heavy oil without separate Circulation...
Page 73 Light oil direct ignition modulating with 2 fuel valves (Operating mode 12) Modulating burner (without shutdown facility for adjustable head) LO-2V Program Figure 43: Light oil direct ignition, modulating, without shutdown facility for adjustable head (Operating mode 12) Modulating burner (with shutdown facility for adjustable head) LO-2V Program Figure 44: Light oil direct ignition, modulating, with shutdown facility for adjustable head...
Page 74 Light oil with gas pilot ignition (Operating mode 3, 9, 16, 21) LOgp Program V2-Oil V1-Oil SV-Oil Light oil PV-Gas (Operating mode 10, 11) Figure 46: Light oil with gas pilot ignition Fuel valve control program Light oil (with gas pilot ignition) Legend for fuel trains: Heavy oil) Light oil...
Page 75 Light oil with gas pilot ignition with 2 fuel valves (Operating mode 3, 9, 16, 21) LOgp-2V Program V2-Oil SV-Oil V1-Oil Light oil PV-Gas (Operating mode 13) Figure 48: Light oil with gas pilot ignition Fuel valve control program Light oil (with gas pilot ignition) Legend for fuel trains: Heavy oil) Light oil...
Page 76 Heavy oil direct ignition, multistage (Operating mode 24) 2-stage burner Program HO m. Umsp LMV37 - Heavy oil direct start - input - with circulation control Bild 424e/0913 Figure 50: Heavy oil direct ignition, 2-stage, with circulation control Heavy oil direct ignition, modulating (Operating mode 23) Modulating burner...
Page 77 Fuel valve control program Heavy oil (transformer direct ignition) with circulation control Legend for fuel trains: Heavy oil) Light oil V3 (= stage 2) Air damper Normally Open position Air damper P LT Valve proving Pmax Pressure switch-max Pmin Pressure switch-min Pilot valve Actuator Safety valve...
Page 78: Sequence Diagrams
7.7 Sequence diagrams The phase numbers given in the sequence diagrams can be read from the following process data: Parameter Phase (state of external module and display) 78/235 Building Technologies Division Basic documentation LMV37.4... CC1P7546en Industry Sector 7 Basic unit 20.09.2013...
Page 79: Gas Direct Ignition "G", "G Mod", "G Mod Pneu
7.7.1 Gas direct ignition «G», «G mod», «G mod pneu» 30 s RAST plug Function / Inputs pin number X3-04 pin 1/2 X5-03 pin 1/4 R (ON) X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2 X5-01 pin 2/3 X5-01 pin 2/3 X5-02 pin 2/3 X9-04 pin 2/3...
Page 80: Gas Pilot Ignition 1 "Gp1", "Gp1 Mod", "Gp1 Mod Pneu
7.7.2 Gas pilot ignition 1 «Gp1», «Gp1 mod», «Gp1 mod pneu» 30 s RAST plug Function / inputs pin number X3-04 pin 1/2 X5-03 pin 1/4 R (ON) X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2 X5-01 pin 2/3 X5-01 pin 2/3 X5-02 pin 2/3...
Page 81: Gas Pilot Ignition 2 "Gp2", "Gp2 Mod", "Gp2 Mod Pneu
7.7.3 Gas pilot ignition 2 «Gp2», «Gp2 mod», «Gp2 mod pneu» 30 s RAST plug Function / inputs pin number X3-04 pin 1/2 X5-03 pin 1/4 R (ON) X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2 X5-01 pin 2/3 X5-01 pin 2/3 X5-02 pin 2/3...
Page 82: Light Oil Direct Ignition "Lo", "Lo Mod", "Lo 2-Stage", "Lo 3-Stage
7.7.4 Light oil direct ignition «Lo», «Lo mod», «Lo 2-stage», «Lo 3-stage» 30 s RAST plug Function / Inputs Pin number X3-04 Pin 1/2 R (ON) X5-03 Pin 1/4 X10-05 Pin 2 / Pin 3/4 X10-06 Pin 1/2 X3-02 Pin 1/2 X5-01 Pin 2/3 X5-02 Pin 2/3 POC *)
Page 83: Light Oil Pilot Ignition "Lo Gp
7.7.5 Light oil pilot ignition «Lo Gp» 30 s RAST plug Function / inputs pin number X3-04 pin 1/2 R (ON) X5-03 pin 1/4 X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2 X5-01 pin 2/3 X5-02 pin 2/3 POC *) X5-02 pin 2/3 RAST plug...
Page 84: With Separate Circulation Control
7.7.6 Heavy oil direct ignition «HO», «HO m. Umsp mod», «HO m. Umsp 2-stage» with separate circulation control 30 s RAST plug Function / inputs pin number X3-04 pin 1/2 X5-03 pin 1/4 R (ON) X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2 X5-01 pin 2/3...
Page 85: Heavy Oil Direct Ignition "Ho", "Ho O. Umsp Mod", "Ho O. Umsp 2-Stage", "Ho O. Umsp 3-Stage" Without Separate Circulation Control
7.7.7 Heavy oil direct ignition «HO», «HO o. Umsp mod», «HO o. Umsp 2-stage», «HO o. Umsp 3-stage» without separate circulation control 30 s RAST plug Function / inputs pin number X3-04 pin 1/2 X5-03 pin 1/4 R (ON) X10-05 pin 2 / pin 3/4 X10-06 pin 1/2 X3-02 pin 1/2...
Page 86: Legend To The Sequence Diagrams
7.7.8 Legend to the sequence diagrams  Note Not all phases, times, indices, abbreviations and symbols appear in the individual sequence diagrams or are needed there! Phase numbers Lockout phase Safety phase Home run Standby (stationary) Fan motor (M) = ON, safety valve (SV) = ON Air damper (LK) ...
Page 87 Indices Parameter: Short/long prepurge time for oil only Short/long on time of oil pump – time Only with valve proving during startup Parameter: With/without alarm in the event of start prevention If signal is faulty in the startup phase, phase 10 is next, otherwise phase 70 Max.
Page 88 Symbols Permissible position range In Standby mode: Actuator is allowed to travel within the permissible position range, but is always driven to the home position; must be in the home position for phase changes 0°/10% Position as supplied (0°) 90°/100% Actuator fully open (90°) Input/output signal 1 (ON) Input/output signal 0 (OFF)
Page 89: Selection Of Operating Mode
Selection of operating mode To facilitate straightforward adaptation of the LMV37.4... to different types of burners, the system offers automatic configuration of the operating mode. This means that – derived from parameter 201 – the most important settings relating to the operating mode are made automatically.
Page 90 Description Modulating Gas direct ignition, modulating electronic air-fuel ratio control ● ● ● G mod electronic Optional with VSD with speed feedback signal Modulating Gas pilot ignition 1, modulating electronic air-fuel ratio control ● ● ● Gp1 mod electronic Optional with VSD with speed feedback signal Modulating Gas pilot ignition 2, modulating electronic air-fuel ratio control ●...
Page 91: Deleting Curves
Description signal ● ● HO o. 2-stage Heavy oil direct ignition without circulation control, electronic 2- Umsp 2- stage ratio control. Optional with VSD with speed feedback signal stage ● ● HO o. 3-stage Heavy oil direct ignition without circulation control, electronic 3- Umsp 3- stage ratio control.
Page 92: Connection To Load Controllers
Connection to load controllers The LMV37.4... system can be connected to different load controllers. Heat request and the required burner output are determined in accordance with the priorities of the different load sources. 9.1 Controller on contact X5-03 pin 1 This contact is given priority over all load sources.
Page 93 Multistage operation X5-03 (stage 2, pin 3 / stage 3, pin 2) In multistage operation, 1 or 2 thermostats can be connected to activate the different burner stages. Multistage operation is possible only when firing on oil. If neither input «Stage 2» nor input «Stage 3» is active, the burner switches to «Stage 1».
Page 94 Shifting multistage operation (OPEN pin 3 / CLOSE pin 2) Using a simple thermostat, a modulating burner can be operated in shifting 2-stage mode. In that case, there must be a firm connection between terminal CLOSE and the live conductor (L), and terminal OPEN must be connected to the thermostat or the controller.
Page 95: Default Output Via Building Automation - X92
9.3 Default output via building automation – X92 To control the LMV37.4... basic unit, building automation can predefine an output via a bus system. Building automation is connected to the basic unit via the X92 interface. Burner startup can take place only when contact X5-03 pin 1 is closed (load controller (LR) ON / OFF).
Page 96: Manual Output
9.4 Manual output A manual output can be set with the «Normal display» of the display and operating unit or via the PC software. Manual output via the display and operating unit Manual output can be activated or adjusted by pressing the F button for at least 1 second and by pressing the + or –...
Page 97: External Load Controller Via Analog Input X64 Pin 1 / X64 Pin 2
9.6 External load controller via analog input X64 pin 1 / X64 pin 2 For the preselection of external outputs, an analog 4…20 mA input is provided. Burner startup can take place only when contact X5-03 pin 1 is closed (load controller (LR) On / Off).
Page 98: Switching Thresholds For Multistage Operation
9.6.2 Switching thresholds for multistage operation For multistage operation, a hysteresis band about the thresholds is introduced. This hysteresis band replaces the minimum positioning step used in multistage operation. The band width is approx. 1 mA. 2-stage operation Actual value Current Display / output value Stage 1...
Page 99: Prioritization Of Load Sources
9.7 Prioritization of load sources To simplify the system’s configuration, the load source must be selected. The system automatically detects the available load sources and selects them. If several load sources are connected, they are selected according to the following priorities: Parameter 942 Priority Active load source...
Page 100: Electronic Air-Fuel Ratio Control
10 Electronic air-fuel ratio control 10.1 General Electronic air-fuel ratio control is used to control the burner’s actuators depending on burner output. It is possible to connect 2 actuators and, optionally, 1 VSD. Resolution is 0.1° with the actuators and 0.1% with the VSD. Output can be regulated in increments of 0.1% in modulating mode and with a maximum of 3 stages in multistage mode.
Page 101: Prepurging
10.2.3 Prepurging This position is approached in phase Traveling to prepurging (24). The position can be set via the following parameters: Parameter Actuator 501.01 Prepurge position fuel actuator 502.01 Prepurge position air actuator 503.01 Prepurge speed VSD Parameter Gas: Prepurging 0 = inactive 1 = active Oil: Prepurging...
Page 102: Modulating Operation
10.3 Modulating operation In modulating mode, it is possible to operate 2 actuators and 1 VSD. The burner‘s output can be regulated between 20% (low-fire) and 100% (high-fire) in increments of 0.1%. Since the actuators are never allowed to operate simultaneously, the output is increased in small steps of 1%.
Page 103: Traveling Speed / Maximum Curve Slope
10.3.2 Traveling speed / maximum curve slope The time required to modulate from low-fire to high-fire can be set via parameter 544. In connection with the actuator’s ramp in the basic unit, the following maximum positioning angles or speed changes between 2 curvepoints can be covered: Modulation Modulation Modulation...
Page 104: Entering The Running Position
Between the ignition time (P0) and the low-fire point (P1), a speed differential of up to 40% can be set for the VSD, independent of the selected ramp. This means that the period of time from ignition to low-fire can vary between 4…32 s (5…40 s ramp). Error Diagnostic Meaning for the LMV37.4...
Page 105: Limitation Of Modulation Range
10.3.5 Limitation of modulation range If the modulation range shall be further restricted from 20 to 100% against the defined curve, 2 parameters are available to define a new low-fire and high-fire position. Parameter Lower output limit undefined = 20 % Upper output limit undefined = 100 % Figure 66: Restriction of modulation range...
Page 106: Setting The Minimum And Maximum Output
10.3.6 Setting the minimum and maximum output When changing the setting of minimum and maximum output after making the curve settings, following is to be observed: After leaving the curve settings with completely defined curvepoints, proceed in modulating operation by setting the minimum / maximum output (parameter 546). In the case of warm settings, the parameterized output remains active until the minimum / maximum output setting is completed.
Page 107: Multistage Operation
10.4 Multistage operation This operating mode is only available when firing on oil. There is a choice of 2-stage and 3-stage operation. Hence, the burner’s output can be modulated via 2 or 3 stages. Modulation is accomplished by adjustment of the air actuator or the VSD and by switching the fuel valves for adjusting the amount of fuel.
Page 108: Adjustment Of Output
10.4.3 Adjustment of output When the output increases, the system moves from the curvepoint of stage 1 (P1) to the switch-on point of stage 2 (P2on). If the switch-on point is exceeded, the valve for the second stage is switched on. Then, the system moves to the curvepoint for stage 2 (P2). When the output decreases, the system moves from the curvepoint of stage 2 (P2) to the switch-off point of stage 2 (P2of).
Page 109: Limitation Of Modulation Range
10.4.6 Limitation of modulation range If the modulation range for stage 1 and stage 2, or stage 3, shall be further restricted, 2 parameters can be used to define a new low-fire and high-fire position. Parameter Lower output limit undefined = 20 % Upper output limit undefined = 100 % 10.5 End of operating position...
Page 110: Notes On Settings And Parameter Settings
The parameter level is password-protected. The OEM assigns individual passwords to the parameter levels he can access. The unit is supplied with default passwords entered by Siemens; they must be changed by the OEM. These passwords are confidential and may be assigned to authorized personnel only ...
Page 111: Actuators X53 / X54
11 Actuators X53 / X54 One or 2 actuators can be connected to the LMV37.4... system, depending on the selected operating mode (refer to chapter Selection of operating mode). Caution! When mounting the actuators, it must be made certain that the mechanical link to the controlling elements is rigid! LMV...
Page 112: Referencing
11.3 Referencing An incremental transducer is used for position feedback. This means that referencing of the actuators must be performed after power-ON. In addition, at the end of each shutdown in phase 10, the actuators are referenced to ensure that individual stepping errors, which could lead to shutdown, do not accumulate.
Page 113: Reference Travel
11.3.1 Reference travel Reference travel means that different reference travels are performed, aimed at unambiguously determining the actuators’ permissible working range. This prevents the actuators from traveling to a range outside the optical feedback system or against a mechanical stop should a power failure during referencing occur. Parameter 611 must be set depending on the mechanical construction and the type of actuator used.
Page 114 Example of actuator with counterclockwise rotation: When referencing in the Close position, the actuator first travels a certain distance into the working range (toward the Open position). Then, it travels to a position representing maximum -7.7°, thereby crossing the reference mark for the first time. Then, the actuator moves in the other direction again and detects the inner ramp of the reference mark.
Page 115: Direction Of Rotation
11.4 Direction of rotation With the SQM3…actuator, the direction of rotation can be selected on an individual basis. Parameter 602.00 Direction of rotation of fuel actuator Index 0 = fuel 0 = counterclockwise 1 = clockwise (exclusively for SQM3...) 602.01 Direction of rotation of air actuator Index 1 = air 0 = counterclockwise...
Page 116: Monitoring The Actuator Positions
11.5 Monitoring the actuator positions To monitor the actuator’s current positions, an optical incremental transducer with a resolution of 0.7° is used. The correct position of the drive shaft is ensured by comparing the motor steps made with the position obtained from the incremental transducer.
Page 117 Parameter Tolerance limit of position monitoring (0.1°) Index 0 = fuel Index 1 = air Greatest position error where an error is securely detected  error detection band: (parameter 606 -0.6°) up to parameter 606 Error Diagnostic Meaning for the LMV37.4... system code code Position error fuel actuator...
Page 118: Changing The Error Detection Band For Monitoring The Actuator Positions
11.6 Changing the error detection band for monitoring the actuator positions The error detection band can be changed via parameter 606. A change is to be made only when using SQN13.17… or SQN14.17… actuators which, due to their mechanical design, require greater tolerances. For these types of actuators, set parameter 606 to 2.2°.
Page 119: Protection Against Actuator Mixup
11.9 Protection against actuator mixup Mixup of actuators can be detected through appropriate mounting (using different reference marks for the air and fuel actuator: Open/Close/0°/90°). With at least one of the actuators, the reference mark not used must be blocked by a mechanical stop. Now, if the actuator connections with the basic unit have been interchanged, one of the actuators cannot reach the reference mark, which is detected by the basic unit.
Page 120: Fan Control
12 Fan control 12.1 Function principle Optionally, the LMV37.4... system can be operated with a VSD or PWM fan. Control is accomplished via a DC 0…10 V interface. For control of the fan’s speed, a safety- related speed feedback signal is required. With pneumatic air-fuel ratio control, the speed feedback signal is not evaluated.
Page 121: Vsd Control X74 Pin 3
To enable the VSD to bring the fan motor’s speed to the correct no-load speed, the motor contactor’s drop out delay time must be about 25 seconds. Example: Siemens Micromaster 440 +24 V Setpoint 0...10 V Figure 73: Connection of VSD to the LMV37.4...
Page 122: Safe Separation Of Mains Voltage And Protective Extra Low-Voltage
12.5 Safe separation of mains voltage and protective extra low-voltage Caution! All inputs and outputs of PWM fan control are designed for use with protective extra low-voltage. For this reason, strict separation from the mains voltage side must be ensured! This necessitates an external power supply by the VSD or an external power pack (X74 pin 1, X74 pin 2).
Page 123: Acquisition Of Speed
12.7 Acquisition of speed 12.7.1 Acquisition of speed with proximity switch The actual speed is acquired by an inductive proximity switch which scans a metal sensor disk. The sensor disk must be attached directly to the motor’s drive shaft. Speed acquisition is safety-related.
Page 124: Acquisition Of Speed With Hall Generator
Speed sensor Figure 75: Speed sensor Selection of fan motor Motor supplier: Selection of a motor with threaded hole M8 x 15 at the end of the fan motor’s drive shaft. Standard motor and machining (drilling hole and cutting thread M8 x 15). 12.7.2 Acquisition of speed with Hall generator If the speed is acquired via a Hall generator, the requirements for safety-related applications are the same as those for the speed feedback signal via sensor disk.
Page 125: Speed Control
12.8 Speed control The LMV37.4... controls the fan motor’s speed to the setpoint. To ensure that the speed can still be increased when the maximum speed is reached, the speed is standardized when the motor is controlled at 95%. Hence, with a speed setpoint of 100 %, a speed increase of 5 % is still possible.
Page 126: Speed Supervision
12.9 Speed supervision The fan’s current speed is acquired by the LMV37.4... and assessed from a safety point of view. If the fan does not operate at the speed setpoint, speed control makes a corrective action, trying to reach the setpoint. If it is not reached within a certain period of time, safety shutdown is initiated.
Page 127: Setting The Parameters Of Vsd
12.10 Setting the parameters of VSD If a control signal of 95% (9.5 V) is not sufficient for the burner to deliver its rated capacity, you can proceed as follows: Set the maximum frequency to 105.3% of the motor’s rated speed In the case of a motor frequency of 50 Hz, this means: Set the maximum frequency of the VSD to 50 Hz x 1.053 = 52.6 Hz (on the VSD).
Page 128: Standardization Of Speed
12.11 Standardization of speed Since the different types of fans operate at different speeds and signal handling should be as straightforward as possible, all speeds in the system are standardized between 0% and 100%. For this reason, the VSD module uses a parameter which contains the Standard speed (100% speed).
Page 129 Close the standardization When standardization is successfully completed, reset parameter 641 to 0. If standardization was not successful, parameter 641 assumes a negative value. The value provides information on the cause of fault: Value Error Remedy Timeout at the end of standardization during ramp Timeout of standardization (VSD’s ramp down of VSD.
Page 130 Value Error Remedy Air actuator is not referenced or has lost its reference. Air actuator not referenced 1. Check if the reference position can be approached. 2. Check if actuators have been mixed up. 3. If error only occurs after standardization was started, the actuator is possibly overloaded and cannot reach the required position.
Page 131: Control Of Fan Motor With Pneumatic Air-Fuel Ratio Control
12.13 EMC of LMV37.4... and VSD The function and EMC tests with the LMV37.4... system have been successfully conducted in connection with the following makes and types of VSDs: Siemens: SED2-0.37 / 22 X Danfoss: VT2807 During operation, VSDs generate electromagnetic interference on the mains network.
Page 132: Description Of Connection Terminals
12.14 Description of connection terminals 12.14.1 LMV... Power supply for speed sensor Speed input VSD control 24V EXT Bild 335e/0409 Figure 76: VSD module X74 12.14.2 PWM fan LMV... 24V EXT Bild 336/0309 Figure 77: PWM fan X74 LMV... Power supply for sensor Speed feedback PWM speed output Controller input 4...20 mA...
Page 133: Load Output X74 Pin 3
13 Load output X74 pin 3 The load output is only available as an alternative to VSD control. If the VSD is deactivated, the output for the VSD delivers the current burner output. The analog output is a voltage output and – using parameter 645 – can be switched between DC 0…10 V, DC 2…10 V and DC 0/2…10 V.
Page 134: 3-Stage Operation
13.4 3-stage operation Actual value Voltage Curvepoint Display / output value DC 0 V Stage 1 DC 3 V Stage 2 DC 5 V Stage 3 DC 10 V 134/235 Building Technologies Division Basic documentation LMV37.4... CC1P7546en Industry Sector 13 Load output X74 pin 3 20.09.2013...
Page 135: Fuel Meter Input X75 Pin 1 / X75 Pin 2
14 Fuel meter input X75 pin 1 / X75 pin 2 A fuel meter can be connected to acquire the amount of fuel burnt. The fuel meter function is only available as an alternative to VSD control. If the VSD is deactivated, a fuel meter can be connected to terminals X75 pin 1 and X75 pin 2.
Page 136: Fuel Throughput
14.2 Fuel throughput With the fuel meter connected, the system calculates continuously the current fuel throughput. The time required for calculating the fuel throughput varies and lies between 1 and 10 seconds. If the fuel meter delivers no pulses for more than 10 seconds, the display shows 0 fuel throughput.
Page 137: Connection And Internal Diagram
15 Connection and internal diagram 7546a14e/0913 Shielding: For shielding the cables on the VSD, refer to:  Siemens SED2 VSD Commissioning Manual (G5192), chapters 4 and 7, or  Danfoss Operation Manual VLT 6000 (MG60A703), chapter Installation VSD X74 COM X92...
Page 138: Special Feature: Burner Identification (Id)
16 Special feature: Burner identification (ID) The OEM must assign an individual burner identification to every burner. This ensures that during backup/restore, incompatible parameter sets cannot be copied between different burners (also refer to the documentation on the PC software under Backup/Restore and in this documentation in chapter Backup / Restore).
Page 139 Parameter Operating mode building automation 0 = off 1 = Modbus 2 = reserved Setback time in the event of communication breakdown Setting values 0 = deactivated 1…7200 s Default output if communication with building automation is interrupted Setting values: For modulating operation the setting range is as follows: 0…19.9 = burner OFF 20…100 = 20…100% burner rating...
Page 140: Modbus
17.2 Modbus With this type of bus protocol, the LMV37.4... basic unit operates as a slave on the Modbus and the transmission mode used is RTU (Remote Terminal Unit). For more detailed information, refer to the Modbus User Documentation (A7541). Parameter Device address for Modbus of basic unit Setting values...
Page 141: Pc Software Acs410
18 PC software ACS410 The ACS410 PC software serves primarily as an operating module for the LMV37.4... system, providing the following basic functions:  Visualization of system state via the following data: - Parameters - Process data  Configuration and parameterization of the basic unit (individual parameters) ...
Page 142: Error History
19 Error history The LMV37.4... system provides an error history in which the last 25 errors are stored. The first entry represents the current error state and can also be «error-free», refer to Error code list. Error Diagnostic Meaning for the LMV37.4... system code code 200 OFF...
Page 143: Makeup Of Error History
19.2 Makeup of error history Parameter Index Description Current error state, can also be error-free Error code (200 = error-free)  refer to Error code list Diagnostic code  refer to Error code list Error class  error classes Error phase: Phase in which error occurred  sequence diagrams Startup counter: Startup meter reading (parameter 166) at which the error occurred...
Page 144: Safety Notes On Use Of The Azl2
21 Safety notes on use of the AZL2… Caution! To prevent the risk of fire and explosions, damage to heating plant or damage resulting from improper use of the products, ensure that the following safety notes are observed: The burner management system covered by the present Basic Documentation may only be used as specified and only in connection with the appropriate burner and heating plant.
Page 145: Operating The Azl2
Operating the AZL2… unit 22.1 Description of unit/display and buttons Function and operation of unit versions AZL21… and AZL23… are identical. /reset h min s Figure 84: Description of unit/display and buttons Button Function Button F - For adjusting the fuel actuator (keep depressed and adjust the value by pressing Button A...
Page 146: Meaning Of Symbols On The Display
22.2 Meaning of symbols on the display Fault status message Flame present Valve controlled Ignition controlled Fan motor controlled Oil preheater on Heat request from controllers Parameter setting mode Info mode Service mode h min s Actuator closing Actuator opening Unit of current display Figure 85: Meaning of display 22.3 Brightness of display...
Page 147: Special Functions
22.4 Special functions 22.4.1 Manual lockout Press simultaneously with any other /reset button. The basic unit switches instantly to the lockout /reset position, irrespective of the operating position. plus other button h min s The display shows the fault status message, except when in parameter setting mode.
Page 148: Timeout For Menu Operation
22.5 Timeout for menu operation The time for automatically leaving the parameter setting level can be adjusted between 10 and 120 minutes, using the following parameter: Parameter Timeout for menu operation If, during that period of time, there is no operation via the AZL2..., the parameter setting level is quit and the password level reset to Info / Service.
Page 149: Backup / Restore
22.6 Backup / restore Using the AZL2..., the settings made on the basic unit can be stored (backup) and then transferred back to the basic unit at a later point in time. Creating a backup data set Parameter 050.0 Index 0: Creation of backup The following parameters can be used to read information about the backup data set: Parameter Burner identification of the AZL2...
Page 150: Backup
22.6.1 Backup Parameter 000: flashes. Display: Parameter 000: flashes, Int does not. /reset Only Press to go to parameter group 041. /reset level Display: Parameter 041: flashes, ._._ does not. Press to select parameter 050 Display: Parameter 050. flashes, index 00: and value 0 do not.
Page 151 After about 5 seconds (depending on the duration of the program), 0 appears on the display, indicating the end Approx. of the backup process. Display: 0  Note If an error occurs during the backup process, a negative value is displayed. For error diagnostics, the cause of the error can be determined from the diagnostic code of error message 137 (see Error code list).
Page 152: Restore
22.6.2 Restore Parameter 000: flashes. Display: Parameter 000: flashes, Int does not. /reset Only Press to go to parameter group 041. /reset level Display: Parameter 041: flashes, ._._ does not. Press to select parameter 050 Display: Parameter 050. flashes, index 00: and value 0 do not.
Page 153 Press to activate the restore process. /reset /reset Display: 1 appears After about 8 seconds (depending on the duration of the program), 0 appears on the display, indicating the end of the backup process. Display: 0  Note  Before restoring the backup data on the basic unit, the latter compares the burner identification and product no.
Page 154: Operation Of Basic Unit Via The Azl2
Operation of basic unit via the AZL2… 23.1 Normal display Normal display is the standard display in normal operation, representing the highest menu level. From the normal display, you can change to the info, service or parameter level. 23.1.1 Display in standby mode Unit is in standby mode.
Page 155: List Of Phase Displays
23.1.2.3. List of phase displays Phase Function Ph00 Lockout phase Ph01 Safety phase Ph10 Home run Ph12 Standby (stationary) Ph22 Fan ramp up time (fan motor = ON, safety valve = ON) Ph24 Traveling to the prepurge position Ph30 Prepurge time Ph36 Traveling to the ignition position Ph38...
Page 156: Display Of Operating Position
23.1.3 Display of operating position Display oP stands for «Operating position reached». Modulating mode: Current output in % h min s Display oP: P0 stands for «Ignition point». Multistage operating mode: Current heating stage h min s Display oP: P1 stands for «Stage 1». Multistage operating mode: Current heating stage h min s Display oP: P2 stands for «Stage 2».
Page 157: Fault Status Message, Display Of Errors And Info
23.1.4 Fault status message, display of errors and info 23.1.4.1. Display of errors (faults) with lockout The display shows Loc:, the bar under the fault status message appears. The unit is in the lockout position. h min s The display shows current error code c: alternating with diagnostic code d: (refer to Flash code list).
Page 158: Error With Safety Shutdown
23.1.4.4. Error with safety shutdown The display shows Err:. The unit initiates safety shutdown. h min s The display shows current error code c: alternating with diagnostic code d:. Press to return to the normal display. /reset h min s Example: Error code 12 / diagnostic code 0 23.1.4.5.
Page 159: Menu-Driven Operation
Menu-driven operation 24.1 Assignment of levels The various levels can be accessed via different button combinations. The parameter level can only be accessed via password. Normal display >1 s /reset Change to normal display >3 s <8 s Info level /reset >3 s <8 s...
Page 160: Info Level
25 Info level The info level displays information about the basic unit and about operation in general.  Note On the info level, you can display the next or the previous parameter by pressing Instead of pressing , you can also press for <1 s.
Page 161: Display Of Info Level
25.1 Display of info level Press until InFo appears. /reset /reset 1…3 s When releasing , you are on the info level. h min s /reset 25.2 Display of info values (examples) 25.2.1 Identification date The display shows parameter 102: flashing on the left, characters ._._ on the right.
Page 162: Burner Identification
25.2.3 Burner identification The display shows parameter 113: flashing on the left, characters ._._ on the right. Example: 113: ._._ h min s Press for 1…3 s to show the burner’s /reset identification. /reset Default setting: - - - - - - - - 1…3 s h min s Example: 3...
Page 163: Total Number Of Startups
25.2.5 Total number of startups The display shows parameter 166: flashing on the left, characters ._._ on the right, since the display of the total number of startups may comprise more than 5 digits. h min s Example: Parameter 166: ._._ Press for 1…3 s to show the total number of /reset...
Page 164: Service Level
Service level The service level is used to display information about errors including the error history and information about the basic unit.  Note When on the service level, you can press to display the next or the previous parameter. Instead of pressing , you can also press for <1 s.
Page 165: Display Of Service Values (Example)
26.2 Display of service values (example) 26.2.1 Number of faults The display shows parameter 161: flashing on the left, the number of faults that occurred thus far on the right 0. Example: Parameter 161: 0 h min s Back to the previous To the next parameter parameter /reset...
Page 166: Parameter Level
The change to the parameter level requires a password. Siemens supplies the LMV37.4... with the factory settings according to Type summary. The OEM can change the Siemens default settings to match his own requirements. With the LMV37.4..., the basic unit’s characteristics are determined primarily through parameter settings.
Page 167: Entry Of Password
27.1 Entry of password  Note The OEM’s password must consist of 5 characters, the heating engineer of 4 characters. Press button combination to display CodE. h min s When releasing the buttons, 7 bars appear the first of which flashes. h min s Press to select a number or letter.
Page 168 As a confirmation of correct entry, PArA appears for a maximum of 2 seconds. h min s  Note For entry of passwords or burner IDs, the following numbers and letters can be used: 168/235 Building Technologies Division Basic documentation LMV37.4... CC1P7546en Industry Sector 27 Parameter level...
Page 169: Entry Of Burner Identification
27.2 Entry of burner identification The burner’s identification is entered like a password (character by character), but from right to left and ending with «_». Parameter 113: flashes. Press to go to editing mode. h min s /reset /reset You are on the display for undefined burner identification.
Page 170: Change Of Heating Engineer's Password
The display no longer flashes. Example: Burner identification 9993 h min s Press to return to the parameter level. PArAmeter 113: for burner identification. h min s 27.3 Change of heating engineer’s password Parameter 041: flashes. Press to go to level c: for password changes. h min s /reset Letter n: for new.
Page 171: Change Of Oem's Password
27.4 Change of OEM’s password Parameter 042: flashes. Press to go to level c: for password changes. h min s /reset Letter n: for new. Proceed as described in chapter Entry of password and enter the new password (5 characters). After entry of the last character, the password must be /reset h min s...
Page 172: Structure Of Parameter Levels
27.6 Structure of parameter levels The parameters are assigned to different levels. /reset Internal parameter (password level) Entering the password /reset /reset Basic Unit Air-fuel ratio control curves (primary setting) /reset Bild 388e/1109 /reset Air-fuel ratio control /reset Actuator /reset Error histery /reset Process data...
Page 173: Parameters Without Index, With Direct Display
27.7 Parameters without index, with direct display 27.7.1 Using the example of parameter 208: Program stop PArAmeter level 200: for basic units. Press to go to menu /reset level 200: /reset Press to select «Program stop». Display: Parameter 208: flashes, value 0 does not.
Page 174   Adopt the value! Discard the change! /reset h min s h min s Press to return to the parameter level. Press to return to editing mode. /reset Display: Parameter 208: flashes, value 0 The value set is adopted. does not.
Page 175: Parameters Without Index, With No Direct Display (With Parameters Having A Value Range >5 Digits)
27.8 Parameters without index, with no direct display (with parameters having a value range >5 digits) 27.8.1 Using the example of parameter 162: Operating hours resettable PArAmeter level 100: for general. h min s Press to go to menu /reset level 100:.
Page 176   Adopt the value! Discard the change! /reset h min s h min s Press to return to the parameter Press to return to editing mode. /reset level. The value set will be adopted. Display: Parameter 162: flashes, characters ._._ do not.
Page 177: Parameter With Index, With Direct Display
27.9 Parameter with index, with direct display 27.9.1 Using the example of parameter 501: No-flame positions fuel actuator PArAmeter level 500: for air-fuel ratio control. h min s /reset Press to go to menu level 500:. /reset Display: Parameter 501. flashes, index 00: h min s and value 0.0 do not.
Page 178   Adopt the value! Discard the change! /reset h min s h min s Press to return to the index. Press to return to editing mode. /reset Display: Parameter 501. does not flash, index The value set will be adopted. 01: flashes, value 0.0 has not changed and does not flash.
Page 179: Parameters With Index, With No Direct Display
27.10 Parameters with index, with no direct display 27.10.1 Using the example of parameter 701: Errors Refer to chapter Error code list!  Note Can be deleted for service, refer to chapter Parameter list! HIStorie 700: for error history. h min s Press to go to the /reset...
Page 180 /reset Press to go to display mode. /reset Display: Value 56 h min s Press to return to the index. Display: Parameter 701. does not flash, index 05: flashes, characters ._._ do not. h min s Press to return to the parameter level. Display: Parameter 701.
Page 181 Back to the previous To the next parameter parameter /reset <1s When this display appears, you have reached the end of the error history. Display – End – appears flashing. h min s Press to return to the parameter level. HISt 700: for error history h min s Back to the previous...
Page 182: Air-Fuel Ratio Curves - Settings And Commissioning
27.11 Air-fuel ratio curves – settings and commissioning The display shows 400: flashing on the left, SEt appears on the right. h min s 27.11.1 Initial commissioning An unprogrammed unit or a unit whose operating mode has been reset or changed displays OFF UPr. h min s For initial commissioning, change to the parameter level (refer to chapter Operation).
Page 183  Note Ensure that the fuel train is correctly set in compliance with the type of burner used. Parameter Actuator controlled Fuel ● ● Burner operating mode (fuel train, modulating / multistage, actuators, etc.) ● ● -- = undefined (delete curves) ●...
Page 184 Press to go to editing mode. /reset /reset h min s Press to select the required setting. Example: 3 for gas modulating with pilot valve h min s (Gp2 mod) Press to save the selected setting. /reset /reset h min s Press to return to the parameter level.
Page 185: Setting Curvepoints P0 And P9 For Modulating Mode ("G Mod", "Gp1 Mod", "Gp2 Mod" And "Lo Mod")
27.11.2 Setting curvepoints P0 and P9 for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo mod»)  Note Not all actuators used in the following example can be set, depending on the selected operating mode. Example of «G mod» Display P0 appears flashing.
Page 186 Press simultaneously to adjust speed n0 of the load controller. s min % Example: 20.0 Release The selected value is adopted. Example: 20.0 s min % To the next curvepoint Press P9 appears flashing. Curvepoint for high-fire. Same procedure as with P0 h min s Note: is pressed first, the display jumps to...
Page 187: Setting Curvepoints P0 And P9 For "G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu
27.11.3 Setting curvepoints P0 and P9 for «G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu» Note  Refer to chapter Setting curvepoints P0 and P9 for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo mod»)! Here, only the air requires adjustment with 187/235 Building Technologies Division...
Page 188: Warm Settings For Modulating Mode ("G Mod", "Gp1 Mod", "Gp2 Mod" And "Lo Mod" And "Ho Mod")
27.11.4 Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo mod» and «Ho mod»)  Note With the warm settings, the burner is started up after pressing the Info button. Air-fuel ratio control can now be accurately set while the flame is present. When traveling along the precalculated curve to high-fire point P9, all intermediate curvepoints (P2…P8) must be set.
Page 189 Phase Traveling to ignition position h min s Wait until the burner is operating and symbol ▲ or ▼ is no longer highlighted! The startup sequence stops in phase 36 Traveling to ignition position. The ignition position can be adjusted under cold conditions. Ignition position P0 can only be set after symbol ▲...
Page 190 Starting the warm settings Ignition position P0 can only be set when symbol ▲ or ▼ is no longer highlighted. For fuel, keep depressed, for air , as well as for VSD as well as Press to adjust the value. h min s When symbol ▲...
Page 191 Figure 90: Setting the curvepoints  Note Curvepoints P2 to P8 are automatically computed as a straight line between P1 and P9. Example 1 = gas modulating P0, P1 and P9 are set as described: Curvepoint Value 1 Value 2 fuel 30.0 22.0...
Page 192 Continue the same way with P2 through P9! High-fire position P9 can only be set when symbol ▲ or ▼ is no longer highlighted. If required, readjust the gas pressure. For fuel, keep depressed, for air , as well as for VSD as well as Press to adjust the value.
Page 193: Warm Settings For Modulating Mode ("G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu")
When symbol ▼ or ▲ is no longer highlighted, you can press ESC a second time. h min s h min s The warm settings for air-fuel ratio control by the LMV37.4... are now completed. 27.11.5 Warm settings for modulating mode («G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu») Note ...
Page 194: Editing The Curvepoints
27.11.8 Editing the curvepoints  Note To check the change on the burner, a curvepoint change in the cold settings necessitates a new approach of all curvepoints in the warm settings. After changing the curvepoint, OFF UPr appears on the normal display of the AZL2… To the next curvepoint To select the curvepoint The selected curvepoint is displayed.
Page 195: Interpolation Of Curvepoints
27.11.9 Interpolation of curvepoints /reset Identification of start for setting the curve parameters. h min s Example 1 = gas modulating P0, P1 and P9 are set as described: Curvepoint Value 1 Value 2 fuel 30.0 22.0 32.0 24.0 80.0 90.0 P2 through P8 have automatically been Curvepoint...
Page 196 Press to change the value as required. Example: 00.0 s min % Release The required value is adopted. h min s Example: P5:50.0:46.0 Keep depressed for >3 s. >3 s CALC appears. h min s The display jumps to P6. h min s All curvepoints from P5 to P9 have now been Curvepoint...
Page 197 >3 s >3 s h min s If it is not only the current curvepoint that shall be changed, but all other curvepoints in the direction of travel as well, a new straight line from the current curvepoint to P9 (press ) or P1 (press ) can be calculated by a long push on...
Page 198: Setting Of Curvepoints For Multistage Mode ("Lo 2-Stage", "Lo 3-Stage", "Ho 2-Stage" And "Ho 3-Stage")
27.11.10 Setting of curvepoints for multistage mode («Lo 2-stage», «Lo 3- stage», «Ho 2-stage» and «Ho 3-stage») Example of «Lo 2-stage» P0 appears flashing. Curvepoint for ignition load. h min s Keep depressed. You are now at P0 of air actuator A. h min s Press simultaneously adjust ignition position P0 of the air actuator.
Page 199: Warm Settings For "Lo 2-Stage", "Lo 3-Stage", "Ho 2-Stage" And "Ho 3-Stage
27.11.11 Warm settings for «Lo 2-stage», «Lo 3-stage», «Ho 2-stage» and «Ho 3-stage» Identification of start for setting the curve parameters. h min s Provided the controller is enabled! /reset Phase Standby (stationary) h min s Phase Fan ramp up (fan motor = ON, safety valve = ON) h min s Phase Traveling to prepurge...
Page 200 Phase Traveling to ignition position h min s Phase Preignition h min s Phase 1st safety time (ignition transformer ON) h min s Phase Interval 1 min s Ignition position P0 can be set only when symbol ▲ or ▼ is no longer highlighted. Keep depressed and, for VSD as well as...
Page 201 Low-fire position P1 can be set only when symbol ▲ or ▼ is no longer highlighted. Set stage 1 P1. Fuel valve V1 is switched on. Keep depressed and, for VSD as well as Press to adjust the value. h min s When symbol ▲...
Page 202 Back to the previous To the next curvepoint curvepoint Curvepoint P2 can only be adjusted when symbol ▲ or ▼ is no longer highlighted. Fuel valve V2 is switched on. Keep depressed and, for VSD as well as Press to adjust the value. h min s When symbol ▲...
Page 203: Cold Settings For Multistage Mode ("Lo 2-Stage", "Lo 3-Stage", "Ho 2-Stage" And "Ho 3-Stage")
h min s The warm settings for air-fuel ratio control of the LMV37.4... have now been configured. 27.11.12 Cold settings for multistage mode («Lo 2-stage», «Lo 3-stage», «Ho 2- stage» and «Ho 3-stage») Note  Refer to chapters Warm settings for «Lo 2-stage» and «Lo 3-stage»! But with no flame, no actuator travel and no automatic operation after the settings have been made.
Page 204: Parameter List Lmv37.4
28 Parameter list LMV37.4... Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Internal parameters Password heating engineer (4 characters) Std_u16 edit 65535 OEM password (5 characters) Std_u16 edit 65535 Start backup / restore via AZL2.../ PC software (set parameter to 1) Std_s8 edit 0;...
Page 205 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Error diagnostics via negative values (see error code 150) Mains frequency Selection edit LMV37.400...: 0 0 = 50 Hz LMV37.420...: 1 1 = 60 Hz Display brightness Std_u8 edit 100%...
Page 206 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Parity for Modbus Selection edit 0 = none 1 = odd 2 = even Default output if communication with building automation is interrupted Output edit / clear 100% 0.1% undefined...
Page 207 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting 2 = active (high active) Load controller contacts X5-03 are deactivated when function is active! Switching back to pilot minimum time Time edit 120 s 0,2 s 30 s Switching back to pilot maximum time Time...
Page 208 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting 18 = Lo 3-stage without actuator 19 = G mod only gas actuator 20 = Gp1 mod only gas actuator 21 = Gp2 mod only gas actuator 22 = Lo mod only oil actuator 23 = Ho mod.
Page 209 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Gas: Active detector flame evaluation Selection edit 0 = QRB / QRC 1 = ION / QRA Gas: Prepurging Selection edit 0 = deactivated 1 = activated Repetition limit gas pressure switch-min Std_u8 edit...
Page 210 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting 0 = inactive LMV37.420...: 2 1 = pressure switch-max 2 = POC 3 = pressure switch valve proving Gas: Forced intermittent operation Selection edit 0 = inactive 1 = activated Repetition limit loss of flame Std_u8...
Page 211 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Oil: Safety time 2 (TSA2) Time edit 15 s 0.2 s LMV37.400...: 5 s LMV37.420...: 10 s Oil: Interval 2 Time edit 0.4 s 60 min 0.2 s Oil: Afterburn time Time...
Page 212 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting No-flame positions fuel actuator Std_s16 edit 0 ° 90 ° 0.1 ° Index Value Index 0 = home position 0° Index 1 = prepurge position 0° Index 2 = postpurge position 15°...
Page 213 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Index 1 = air 1.7° write: OEM Greatest position error where a fault is securely detected  error detection band: (parameter 606-0.6°) to parameter 606 Type of referencing Std_u8 edit Index...
Page 214 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting • Error history: 701-725.02.Diagnostic code Std_u8 read only Info / Service • Error history: 701-725.03.Error class Std_u8 read only Info / Service • Error history: 701-725.04.Phase Std_u8 read only Info / Service...
Page 215 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Contact feedback network counter register Std_u8 read only Required relay state (bit-coded) Std_u8 read only Info / Service Bit 0 = 1: Alarm Bit 1 = 2: Safety valve Bit 2 = 4: Ignition Bit 3 = 8: Fuel valve 1 Bit 4 = 16: Fuel valve 2...
Page 216: Error Code List
29 Error code list Error Diagnostic code Meaning for the LMV37.4... system Remedy code No communication between LMV37.4... basic unit no Comm Check wiring for line interruption/loose contact and AZL2... No flame at the end of the safety time (TSA) No flame at the end of safety time 1 (TSA1) No flame at the end of safety time 2 (TSA2) No flame at the end of safety time 1 (TSA1) (software...
Page 217 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Loss of flame  Loss of flame (software version V02.00) 3...255 Loss of flame due to TÜV test (loss-of-flame test) Valve proving For valve proving via X5-01 (gas pressure switch-min) - Check to see if the valve on the burner side is leaking Fuel valve 1 (V1) leaking - Check to see if the pressure switch for the valve proving is closed when gas pressure is present...
Page 218 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Check to see if the valve’s closing contact opens when the valve is controlled.  Check wiring. POC open – start prevention (software version Check whether valve’s make contact opens when valve is controlled V02.00) 22 OFF S Safety loop / burner flange...
Page 219 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Check that the oil is preheated correctly Internal error Make a reset; if error occurs repeatedly, replace the unit Internal error Make a reset; if error occurs repeatedly, replace the unit Internal error Make a reset;...
Page 220 Error Diagnostic code Meaning for the LMV37.4... system Remedy code 523) or the setting for the modulating operating ramp is incorrect (parameter 544) 3. Characteristic of the VSD is not linear. Configuration of the voltage input at the VSD must accord with that of the basic unit (parameter 645).
Page 221 Error Diagnostic code Meaning for the LMV37.4... system Remedy code The standardized speed measured does not lie in the permissible range Invalid standardized speed  motor turns too slowly or too fast The speeds of microcomputer 1 and 2 deviated too much. This can be caused by wrong standardized speeds (e.g.
Page 222 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Curve slope max. 10% for LMV37.4 ramp of 40 seconds (20% for 20 seconds or 40% for 10 seconds) → Between the ignition point (P0) and the low-fire point (P1), the speed change in modulating mode may be a maximum of 40%, independent of the LMV3…...
Page 223 Error Diagnostic code Meaning for the LMV37.4... system Remedy code SQM33.7) between 2 curve points in modulating mode. 2. Modulating operating ramp 64 seconds The slope of the curve may be a maximum position change of 62° (30° for SQM33.6 and 18° for SQM33.7) between 2 curve points in modulating mode.
Page 224 Error Diagnostic code Meaning for the LMV37.4... system Remedy code  check wiring (voltage X53 across pin 5 or 6 and pin 2 >0.5 V) Valency 1 Check position differential between the curvepoints and the modulating operating ramp setting (parameter 544). 1.
Page 225 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Error relay supervision 2 Safety valve 3 Ignition transformer Make a reset; if error occurs repeatedly, replace the unit 4 Fuel valve 1 Relay does not pull in 5 Fuel valve 2 6 Fuel valve 3 Internal error relay control Make a reset;...
Page 226 Error Diagnostic code Meaning for the LMV37.4... system Remedy code Operation no longer allowed Too many disturbance pulses at the fuel meters input Interrupt limitation fuel counter input  Improve EMC Make a reset, repeat last parameterization / check. Restore the parameter set, if error occurs Internal error EEPROM access repeatedly, replace the unit Make a reset, repeat last parameterization / check.
Page 227 Error Diagnostic code Meaning for the LMV37.4... system Remedy code The Backup has a unpassable ASN and may not restore of the unit 241 (-15) Restore –interruption concerning unpassable ASN Backup is faulty and cannot be transferred back 242 (-14) Backup –...
Page 228 Error Diagnostic code Meaning for the LMV37.4... system Remedy code reset attempt Internal error management Make a reset; if error occurs repeatedly, replace the unit Internal error management Make a reset; if error occurs repeatedly, replace the unit Internal error management Make a reset;...
Page 229: Revision History Of Basic Unit Lmv37.4
30 Revision history of basic unit LMV37.4... Software changes Software version V01.20  Optimizations regarding ACS410 (backup / restore)  Faster parameterization with AZL2… (3-stage)  Burner identification setting (entering the password)  Optimization: System hooks itself up in phase 38 ...
Page 230 Software version V01.80  Optimization: Valve proving during shutdown after display error in operation  Optimization: Any valve proving aborted by Pmin during shutdown is repeated with the next startup Software version V01.90  Scaling of analog input changed (no burner OFF function) ...
Page 231 Software version V02.90  Optimization: Indication of errors on the parameter and info / service menu  Optimization: Rectification of eBus error telegrams, correction of manufacturer’s code for safety limit thermostat, extension of service data interrogation PB:03h SB:10h by the meter readings of the second fuel, PB:05h SB:09h shows the fuel currently burnt ...
Page 232 Automatic return travel of the SQN1... at the lower internal stop  Parameter on Siemens level Longer ignition off time during safety time 1 (TSA1) (increased from 0.4 to 0.6 seconds) to prevent wrong error diagnostics in connection with QRA2… (C:7 in place of C:2) Software version V03.30...
Page 233: List Of Figures
31 List of figures Figure 1: Note on mounting ................... 13 Figure 2: Electrical connection ..................15 Figure 3: System structure .................... 20 Figure 4: Ionization input at AC 120 V / AC 230 V ............27 Figure 5: QRB… input at AC 120 V / AC 230 V ............30 Figure 6: Dimension LMV37.4...
Page 234 Figure 34: Gas pilot ignition 1 ..................69 Figure 35: Gas pilot ignition 2 ..................69 Figure 36: Gas – fuel valve control - program ............... 70 Figure 37: Light oil direct ignition, multistage ..............71 Figure 38: Light oil direct ignition, 2-stage ..............71 Figure 39: Light oil direct ignition, 3-stage ..............
Page 235 Figure 89: Structure of parameter levels ..............172 Figure 90: Setting the curvepoints ................191 Figure 91: Changing several curvepoints ..............197 Siemens AG Infrastructure & Cities Sector Building Technologies Division © 2013 Siemens AG Infrastructure & Cities Sector Berliner Ring 23...

Siemens LMV37.4 Series Basic Documentation

1 Safety Notes

2 System Structure/Function Description

3 Type Summary

4 Technical Data

5 Dimensions

6 Display and Diagnostics

7 Basic Unit

8 Selection of Operating Mode

9 Connection to Load Controllers

10 Electronic Air-Fuel Ratio Control

11 Actuators X53 / X54

12 Fan Control

13 Load Output X74 Pin 3

14 Fuel Meter Input X75 Pin 1 / X75 Pin 2

15 Connection and Internal Diagram

16 Special Feature: Burner Identification (ID)

17 Connection to Superposed Systems

18 PC Software ACS410

19 Error History

20 Lifecycle Function

21 Safety Notes on Use of the AZL2

22 Operating the AZL2

23 Operation of Basic Unit Via the AZL2

24 Menu-Driven Operation

25 Info Level

26 Service Level

27 Parameter Level

28 Parameter List LMV37.4

29 Error Code List

30 Revision History of Basic Unit LMV37.4

31 List of Figures

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Summary of Contents for Siemens LMV37.4 Series