Siemens LMV27.100x2 Basic Documentation
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Siemens LMV27.100x2 Basic Documentation

Basic unit with integrated air-fuel ratio control for forced draft burners
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LMV27.100x2
Basic unit with integrated air-fuel ratio control for
forced draft burners
Basic Documentation
The LMV27 and this Basic Documentation are intended for OEMs which integrate the units in their products!
Software version
V03.70
CC1P7541en
Building Technologies
17.12.2018

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Summary of Contents for Siemens LMV27.100x2

  • Page 1 LMV27.100x2 Basic unit with integrated air-fuel ratio control for forced draft burners Basic Documentation The LMV27 and this Basic Documentation are intended for OEMs which integrate the units in their products! Software version V03.70 CC1P7541en Building Technologies 17.12.2018...
  • Page 2 Supplementary documentation User Documentation Modbus AZL2 ................ A7541 Environmental Product Declaration LMV2 / LMV3 ..........E7541 Installation and Operating Instructions PC Software ACS410 ......... J7352 Data Sheet LMV27 ....................N7541 Product Range Overview LMV2 / LMV3 ..............Q7541 2/219 Building Technologies Basic Documentation LMV27...

  • Page 3: Table Of Contents

    Contents Safety notes ....................9     Warning notes ....................9       Mounting notes ....................10   Installation notes .................... 11     Electrical connection of the LMV27 ............... 12       Connection BCI via integrated RJ11 jack (X56) ..........13  ...
  • Page 4 Digital input ....................36     7.3.1 Safety loop X3–04, pin 1 and 2 ..............36     7.3.2   Burner flange X3–03, pin 1 and 2 ..............37   7.3.3   Input for external load controller (ON / OFF) X5–03, pin 1 ......37  ...
  • Page 5 Deleting curves ....................81       Connection to load controllers ..............82     Load controller on contact X5-03, pin 1 ............82   External load controller via contacts X5-03, pin 2 / pin 3 ....... 82     Default output via building automation –...
  • Page 6 Load output X74 pin 3 ................107     12.1   Safe separation of mains voltage and extra low-voltage ......107   12.2   Modulating operation ................... 108   12.3 2-stage operation ..................108     12.4   3-stage operation ..................108  ...
  • Page 7 22.1.4.1. Display of errors (faults) with lockout ............130     22.1.4.2. Reset‘ ......................130     22.1.4.3. Activating info / service mode from lockout ..........130     22.1.4.4. Error with safety shutdown ................131     22.1.4.5. General information ..................131  ...
  • Page 8 26.11.4 Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2   mod» and «Lo mod») ................... 163   26.11.5 Warm settings for modulating mode («G mod pneu», «Gp1 mod pneu»   and «Gp2 mod pneu») ................. 168   26.11.6  ...

  • Page 9: Safety Notes

    LMV27 are safety devices! Do not open, interfere with or modify the units. Siemens does not assume responsibility for damage resulting from unauthorized interference! Additional safety notes contained in other chapters of this document must be...

  • Page 10: Mounting Notes

    To ensure safety and reliability of the LMV27, the following points must also be observed:  Condensation and ingress of humidity must be avoided. Should such conditions occur, make sure that the unit will be completely dry before switching on again! ...

  • Page 11: 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 12: Electrical Connection Of The Lmv27

    1.4 Electrical connection of the LMV27 The LMV27 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 13: Connection Bci Via Integrated Rj11 Jack (X56)

     The signal cable from the LMV27 to the AZL2 must conform to certain specifications. Siemens has specified the signal cable for use under the burner hood. When using signal cables of other manufacture, Siemens requirement are not necessarily met ...

  • Page 14: 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 15: Commissioning Notes

    Commissioning notes  When commissioning the unit, check all safety functions  There is no absolute protection against incorrect use of the RASTx connectors. For this reason, prior to commissioning the plant, check the correct assignment of all connectors  Electromagnetic emissions must be checked on an application-specific basis After the plant has been installed and commissioned, the person responsible for the plant / heating engineer must document the parameterized values and settings (e.g.
  • Page 16 The functions of the following available or required input status signals must be checked:  Air pressure  Minimum gas pressure and maximum gas pressure or POC  Gas pressure valve proving  Minimum oil pressure and maximum oil pressure ...

  • Page 17: 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 18: Standards And Certificates

    The electrical connections of the LMV27 comply with the requirements of EN 60335-2-102. EAC Conformity mark (Eurasian Conformity mark) ISO 9001:2015 ISO 14001:2015 OHSAS 18001:2007 China RoHS Hazardous substances table: http://www.siemens.com/download?A6V10883536 18/219 Building Technologies Basic Documentation LMV27... CC1P7541en 1 Safety notes 17.12.2018...

  • Page 19: Service Notes

    1.10 Service notes  If fuses are blown, the unit must be returned to Siemens (refer to chapter Warning notes)  Error diagnostics can only be made via the LMV27 (BC interface)  Note! Only authorized persons may replace the fuse (according to EN 298-1, chapter 9.2.r) 1.11 Life cycle...

  • Page 20: System Structure / Function Description

    System structure / function description The LMV27 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. In the LMV27 are integrated:  Burner management system complete with valve proving system ...

  • Page 21: General Information

    2.2 General information The burner management system is operated and parameterized either via the AZL2 or with the help of the ACS410 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 LMV27 basic unit Mains voltage 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 Degree of protection IP00 to DIN EN 60529...

  • Page 23: Terminal Loading Outputs

    4.1.2 Terminal loading Outputs Total contact loading:  Rated voltage 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 Individual contact loading: Fan motor contactor ...

  • Page 24: Cable Lengths

    4.1.4 Cable lengths  Mains line AC 230 V Max. 100 m (100 pF/m)  Display, BCI For installation under the burner hood or in the control panel Max. 3 m (100 pF/m)  Load controller X5-03 Max. 20 m (100 pF/m) ...

  • Page 25: Agv50 Signal Cable From Azl2  Bci

    4.2 AGV50 signal cable from AZL2  BCI Signal cable Color white Unshielded Conductor 4 x 0.141 mm² With RJ11-plug Cable length - AGV50.100 - AGV50.300 Location Under the burner hood (extra measures required for SKII EN 60730-1) 4.3 Environmental conditions Storage DIN EN 60721-3-1 Climatic conditions...

  • Page 26: Flame Detectors

    4.4 Flame detectors 4.4.1 Ionization probe No-load voltage at ION terminal Approx. U Mains (X10–05 pin 2) Caution! The ionization probe must be protected against electric shock hazard! Short-circuit current Max. AC 1 mA Required detector current Min. DC 2.3 µA, flame display approx. Possible detector current Max.
  • Page 27 Threshold values when flame is supervised by an ionization probe: - Start prevention (extraneous light) Intensity of flame (parameter 954) ≥18% - Operation Intensity of flame (parameter 954) >24% Ionization input Ionization current in µA Figure 5: Ionization input at AC 230 V Measuring circuit for Ionization probe detector current...

  • Page 28: Uv Flame Detectors Qra2 / Qra4 / Qra10

    4.4.2 UV flame detectors QRA2 / QRA4 / QRA10 Caution! If QRA2-UV tubes / QRA4-UV tubes / QRA10-UV tubes are used for flame supervision on the LMV27, it must be ensured that the basic unit is permanently connected to power (EN 298), thus enabling the LMV27 to detect flame detector failures during startup and shutdown.

  • Page 29: Photoresistive Flame Detectors Qrb1 / Qrb3

    4.4.3 Photoresistive flame detectors QRB1 / QRB3 No-load voltage at QRB1/QRB3 terminal Approx. DC 5 V (X10-05 pin 3) Max. perm. length of QRB1/QRB3 3 m (wire – wire 100 pF/m) detector 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 30: Yellow Flame Detector Qrb4

    4.4.4 Yellow flame detector QRB4 Open-circuit voltage at terminal QRB4 Approx. 5 V DC (X10-05 pin 3) Permissible length of QRB4 detector 3 m (wire to wire100 pF/m) cable (laid separately) Threshold values when flame is supervised by QRB4 Start prevention (extraneous light) Flame intensity (parameter 954) ≥10% Operation Flame intensity (parameter 954) >16%...

  • Page 31: Blue-Flame Detectors Qrc

    4.4.5 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. Start prevention (extraneous light) with Ca.

  • Page 32: Dimensions

    Dimensions 5.1 LMV27 Dimensions in mm 82,5 22,8 10,2 12,5 23,5 27,2 82,5 128,5 7541m08/0506 Figure 10: Dimensions of the LMV27 32/219 Building Technologies Basic Documentation LMV27... CC1P7541en 5 Dimensions 17.12.2018...

  • 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, or via additional OCI410 interface to ACS410 PC software Communication / parameterization The AZL2 offers ease of operation, parameterization and targeted diagnostics via AZL2 features menu-driven operation.

  • Page 34: 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 LMV27 can be used with different types of flame detectors.

  • Page 35: 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 LMV27 switches to the safety phase.

  • Page 36: Digital Input

    Digital input 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. The safety loop includes the following components: ...

  • Page 37: 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 14: Burner flange X3-03 For error diagnostics and parameters, refer to chapter Safety loop. 7.3.3 Input for external load controller (ON / OFF) X5–03, pin 1 When the external control loop is closed, the internal input message Heat request is...

  • Page 38: Air Pressure Switch X3-02

    7.3.5 Air pressure switch 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 39: Gas Pressure Switch For Valve Proving X9-04

    7.3.6 Gas pressure switch for valve proving X9-04 Input for connection of Pressure switch valve proving X9-04. The input is active only when operating on gas and when valve proving is activated (refer to chapter Program sequence). Parameter Gas: Execution valve proving 0 = no valve proving 1 = valve proving on startup 2 = valve proving on shutdown...

  • Page 40: Gas / Oil Pressure Switch-Min, Start Release Gas X5-01

    7.3.7 Gas / oil pressure switch-min, 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. Pressure switch-min-gas The LMV27 enables parameterization of which gas train position the gas pressure switch-min is mounted on.
  • Page 41 If there is no gas pressure, at least safety shutdown is initiated. Error Diagnostic Meaning for the LMV27 code code Pressure switch-min No minimum gas / oil pressure Gas shortage start prevention Pressure switch-min No minimum gas / oil pressure Gas shortage start prevention For the input, a repetition counter can be parameterized.

  • Page 42: Setting The Time For Making The Pressure Switch Test

    Oil pressure switch-min In all types of oil train, the minimum oil pressure is expected from phase 38. If no oil pressure is detected when the maximum time (parameter 217) has elapsed or if, subsequently, the oil pressure drops, the system initiates lockout. Parameter Maximum waiting time for detecting a detector or pressure switch signal (e.g.

  • Page 43: Gas / Oil Pressure Switch-Max / Oil Pressure-Max Or Poc Contact, Start Release Oil X5-02

    7.3.9 Gas / oil pressure switch-max / oil pressure-max 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 44: Reset X8-04, Pin 1

    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 Maximum time to start release Error...

  • Page 45: Digital Outputs

    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 and, for this reason, can only be used for non-safety-related actuators, or actuators made safe in some other form (e.g.

  • Page 46: Output Ignition Type Si (Ignition) - X4-02

    7.4.4 Output ignition type SI (IGNITION) – X4–02 LMV... Ignition (Z) Protective earth (PE) Bild 285e/0409 Figure 25: Output ignition X4-02 Output for the connection of ignition transformers or electronic ignition modules. When firing on gas, ignition is switched on just prior to the first safety time in phase 38. The preignition time in phase 38 can be parameterized.

  • Page 47: Outputs Fuel Valves V1 / V2 / V3 / Pv, Type Si - X8-02, X7-01, X7-02

    7.4.5 Outputs fuel valves V1 / V2 / V3 / PV, type SI – 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 26: Output fuel valve V1 X8-02 LMV...

  • Page 48: Program Sequence

    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 49: 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 50: Valve Proving With Separate Pressure Switch 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 51: 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 – test time atmospheric pressure. When the gas has closed, the gas pressure in the test space must not exceed a certain level.

  • Page 52: 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 53: Special Functions During The Program Sequence

    7.5.3 Special functions during the program sequence 7.5.3.1. Reset / manual lockout The LMV27 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 LMV27 from any of the operating levels or, in other words, to trigger non-volatile lockout.

  • Page 54: Alarm Upon Start Prevention

    Resetting via the ACS410 PC software Refer to the documentation covering the ACS410 PC software (J7352). Error Diagnostic Meaning for the LMV27 code code Manual lockout via ACS410 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 55: Repetition Counter

    7.5.3.4. Repetition counter Repetition counters are available for different types of errors. They are used to set the number of errors that are permitted until lockout occurs. The last error initiates lockout. When setting the number of errors to 3, for example, a repetition (restart) takes place after the first 2 errors, and after the third error, the LMV27 initiates lockout.
  • Page 56 Error Diagnostic Meaning for the LMV27 code code No flame at the end of the first safety time Air pressure Loss of flame Pressure switch-min No minimum gas / oil pressure Safety loop / burner flange open OFF S Referencing error ones actuators Error fuel actuator Error air actuator If the adjustable repetition counter limits are changed, the actual counter is recharged...

  • Page 57: 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 1 = active 0 = inactive When prepurging is activated, it is performed in accordance with the adjusted prepurge time.

  • Page 58: Gas Shortage Program

    7.5.3.6. Gas shortage program Valve proving via pressure switch-min-gas (parameter 236 = 2) As gas pressure switch-min-gas is located between the valves, the gas shortage test cannot be made in phase 22. Instead, when performing valve proving on startup, the gas shortage test is performed at the end of the filling time (end of phase 82).

  • Page 59: 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 LMV27 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 60: 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 61: 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 LMV27 detects loss of flame.

  • Page 62: Postpurging In The Lockout Position

    7.5.3.12. Postpurging in the lockout position Parameter 190 can be used to move the actuators (actuators or VSD) to the postpurge position while they are in the lockout position. Parameter Postpurging in lockout position 0 = deactivate (no-load position) 1 = active (postpurge position) When active, the Alarm in the event of start prevention function (parameter 210) is only possible to a limited extent! ...

  • Page 63: Fuel Trains (Application Examples)

    Fuel trains (application examples) Gas direct ignition (Operating mode 1, 7, 14, 19, Program Direct ignition Figure 36: Gas direct ignition Gas pilot ignition 1 (Operating mode 2, 8, 15, 20) Program Gas pilot Figure 37: Gas pilot ignition 1 Gas pilot ignition 2 (Operating mode 3, 9, 16, 21, Program...
  • Page 64 Fuel valve control Gas (always modulate) Legend for fuel trains: Not used 1) For the valve proving function, the pressure switch-min is located between the fuel valve V1 / V2 Light oil Normally Open P LT Valve proving Pmax Pressure switch-max Pmin Pressure switch-min Pilot valve Actuator...
  • Page 65 1-stage burner Light oil direct ignition, multistage Program (Operating mode 5, 17) 7541s04e/1007 Figure 40: Light oil - direct ignition 1-stage (Operating mode 5, 17) 2-stage burner Program 7541s05e/1007 Figure 41: Light oil - direct ignition 2-stage (Operating mode 6, 18) 3-stage burner Program 7541s06e/1007...
  • Page 66 Fuel valve control Light oil (transformer for direct ignition) Legend for fuel trains: Light oil Normally Open Air damper position Air damper P LT Valve proving Pmax Pressure switch-max Pmin Pressure switch-min Pilot valve Actuator Safety valve (outdoors) TSAx Safety time Figure 43: Light oil - direct ignition stage - fuel valve control Fuel valve Ignition...
  • Page 67 Light oil direct ignition, modulating Modulating burner (without shutdown facility for adjustable head) (Operating mode 4, 22) Program 7541s07e/1007 Figure 44: Light oil - direct ignition modulation Modulating burner (with shutdown facility for adjustable head) (Operating mode 4, 22) Program 7541s08e/1007 Figure 45: Light oil - direct ignition modulation Light oil (transformer for direct ignition)
  • Page 68 Light oil direct ignition modulating with 2 fuel valves Modulating burner (without shutdown facility for adjustable head) (Operating mode 12) LO-2V Program Figure 47: Light oil – direct ignition, modulating, without shutdown facility for adjustable head Modulating burner (with shutdown facility for adjustable head) (Operating mode 12) LO-2V Program...
  • Page 69 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 50: Light oil with gas pilot ignition Light oil (with gas pilot ignition) Fuel valve control Legend for fuel trains: Light oil Normally Open...
  • Page 70 Light oil with gas pilot ignition with 2 fuel valves (Operating mode 3, 9, 16, 21) LOgp-2V Program SV-Oil V1-Oil V2-Oil Light oil PV-Gas (Operating mode 13) Figure 52: Light oil with gas pilot ignition Light oil (with gaspilot ignition) Fuel valve control Legend for fuel trains: Light oil...

  • Page 71: 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) 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...

  • Page 72: 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 73: 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 74: 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...

  • Page 75: Light Oil - Pilot Ignition "Logp""Logp Mod" "Logp 2-Stage

    7.7.5 Light oil – pilot ignition «LoGp»«LoGp mod» «LoGp 2- 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 76: Legend To The Sequence Diagrams

    7.7.6 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 = ON, safety valve = ON Air damper ...
  • Page 77 Indices Parameter: Short/long prepurge time for oil only Short/long oil pump – ON – 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 78 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 79: Selection Of Operating Mode

    Selection of operating mode To facilitate straightforward adaptation of the LMV27 to different types of burners, the LMV27 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 80 Description Modulating ● ● G mod Gas direct ignition, electronic modulating ratio control. electronic Modulating ● ● Gp1 mod Gas pilot ignition 1, electronic modulating ratio control. electronic Modulating ● ● Gp2 mod Gas pilot ignition 2, electronic modulating ratio control. electronic Modulating ●...

  • Page 81: Deleting Curves

    Description control ¹) ● ● Ho mod without Modulating Heavy oil direct ignition, without circulation control, electronic modulating ratio circulation electronic control. control ¹) ● Ho 2 stage 2-stage Heavy oil direct ignition, without circulation control, electronic 2-stage ratio without control.

  • Page 82: Connection To Load Controllers

    Connection to load controllers The LMV27 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 Load controller on contact X5-03, pin 1 This contact is given priority over all load controller sources.
  • Page 83 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. If input Stage 2 becomes active, the burner switches to the second stage.
  • Page 84 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 load controller.

  • Page 85: Default Output Via Building Automation - X92

    9.3 Default output via building automation – X92 To control the LMV27, the BAC system can predefine an output via a bus system. The Building automation is connected to the LMV27 via the X92 interface. Burner startup can take place only when contact X5-03 pin 1 is closed (load controller On / Off).

  • Page 86: Manual Output

    9.4 Manual output A manual output can be set with the Normal display of the AZL2 or via the ACS410 PC software. Manual output via the AZL2 Manual output can be activated or adjusted by pressing the F button for at least 1 second and by pressing the + or –...

  • Page 87: Prioritization Of Load Controller Sources

    9.6 Prioritization of load controller sources To simplify the LMV27’s configuration, the load controller source must be selected. The LMV27 automatically detects the available load sources and selects them. If several load controller sources are connected, they are selected according to the following priorities: Parameter 942 Priority...
  • Page 88 If the external load controller via contacts is not used, it is possible to change to manual output via the switch for switching from automatic to manual operation; this cuts the connection to the load controller. In that case, the LMV27 switches to the external load controller via contact. A switch for Open/Close or stage 2/stage 3 can then be connected to the load controller’s terminals.

  • Page 89: Electronic Air-Fuel Ratio Control

    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. Resolution is 0.1° with the actuators. Output can be regulated in increments of 0.1% in modulating mode and with a maximum of 3 stages in multistage mode.

  • Page 90: Ignition

    10.2.4 Ignition The ignition position is approached in phase Traveling to the ignition position (38). The position is set via curve parameterization under P0. In modulating operation, this point is assigned to an output of 10%. 10.2.5 Postpurging This position is approached in phase Traveling to postpurging (72). The position can be set via the following parameters: Parameter Actuator...

  • Page 91: Modulating Operation

    10.3 Modulating operation In modulating mode, it is possible to operate 2 actuators. The burner‘s output can be regulated between 20.0% (low-fire) and 100.0% (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 92: 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. The following maximum curve slopes (positioning angle) can be achieved depending on the set ramp-up time (parameter 544): Modulation Modulation Modulation Modulation 32 s...

  • Page 93: 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 % Fuel...

  • Page 94: 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 95: 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 and by switching the fuel valves for adjusting the amount of fuel.

  • Page 96: Adjustment Of Output

    10.4.3 Adjustment of output When the output increases, the LMV27 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 LMV27 moves to the curvepoint for stage 2 (P2). When the output decreases, the LMV27 moves from the curvepoint of stage 2 (P2) to the switch-off point of stage 2 (P2of).

  • Page 97: Limitation Of Modulation Range

    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 98: Actuators X53 / X54

    Actuators X53 / X54 One or 2 actuators can be connected to the LMV27, 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 99: 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 100 Parameter Ramp modulating Selection of reference point Index 0 = fuel Index 1 = air Setting values: 0 = closed (<0°) 1 = open (>90°) Actuator's direction of rotation Index 0 = fuel Index 1 = air Setting values: 0 = counterclockwise 1 = clockwise (exclusively for SQM3) Tolerance limit of position monitoring (0.1°) Index 0 = fuel...

  • Page 101: 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 102 Example of actuator with counterclockwise rotation: When referencing in the CLOSE position, the actuator first travels a certain distance into the working range (towards 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 103: Direction Of Rotation

    11.4 Direction of rotation With the SQM3 actuator, the direction of rotation can be selected on an individual basis. Parameter Actuator's direction of rotation 602.00 Index 0 = fuel Setting values: 0 = counterclockwise 1 = clockwise (exclusively for SQM3) Actuator's direction of rotation 602.01 Index 1 = air...

  • Page 104: 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 105: Changing The Error Detection Band For Monitoring The Actuator Positions

    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 LMV27 code code Position error fuel actuator...

  • Page 106: 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.

  • Page 107: Load Output X74 Pin 3

    Load output X74 pin 3 This output 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. Parameter 645 Voltage range Remarks DC 0…10 V...

  • Page 108: Modulating Operation

    12.2 Modulating operation Actual value Voltage Curvepoint Display / output value DC 0 V Ignition load DC 1 V Low-fire DC 2 V High-fire DC 10 V 100% The values between low-fire and high-fire are interpolated in a linear manner. 12.3 2-stage operation Actual value Voltage...

  • Page 109: Fuel Meter Input X75 Pin 1 / X75 Pin 2

    13 Fuel meter input X75 pin 1 / X75 pin 2 A fuel meter can be connected to acquire the amount of fuel burnt. LMV... Fuel meter input Detector supply fuel meter Bild 338e/1109 Figure 71: Fuel meter input X75 13.1 Configuration of fuel meter 13.1.1 Types of fuel meters The LMV27 is designed for use with fuel meters equipped with a Reed contact.

  • Page 110: Fuel Throughput

    13.2 Fuel throughput With the fuel meter connected, the LMV27 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 111: Connection And Internal Diagram

    14 Connection and internal diagram 7541a51e/0718 Load output VSD X74 COM X92 FUEL X54 AIR X53 Actuator Actuator Fuel Figure 72: Inputs and outputs 111/219 Building Technologies Basic Documentation LMV27... CC1P7541en 14 Connection and internal diagram 17.12.2018...

  • Page 112: Special Feature: Burner Identification

    15 Special feature: Burner identification 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 ACS410 PC software under Backup/Restore and in this documentation in chapter Backup / Restore).

  • Page 113: Modbus

    Parameter Operating mode building automation 0 = off 1 = Modbus 2 = reserved Setback time in the event of communication breakdown Setting values 0 = inactive 1…7200 s Predefined output in the event of communication breakdown with building automation Setting values: For modulating operation, the setting range is as follows: 0…19.9 = burner off...

  • Page 114: Pc Software Acs410

    PC software ACS410 The ACS410 PC software serves primarily as an operating module for the LMV27, providing the following basic functions:  Visualization of system state via the following data: - Parameters - Process data  Configuration and parameterization of the LMV27 (individual parameters) ...

  • Page 115: Error History

    Error history The LMV27 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 (see chapter to error code list). Error Diagnostic Meaning for the LMV27 code code 200 OFF...

  • Page 116: Makeup Of Error History

    18.2 Makeup of error history Parameter Index Description Current error state, can also be error-free Error code (200 = error-free)  refer to chapter Error code list Diagnostic code  refer to chapter Error code list Error class  error classes Error phase: Phase in which error occurred ...

  • Page 117: Lifecycle Function

    19 Lifecycle function If the startup counter exceeds a defined threshold, a display error code is set and displayed. The error can be acknowledged. The display code is always set in Standby mode (when there is no heat request). Hence, the moment the threshold is exceeded, the user is notified that the end of the lifecycle of the LMV27 will soon be reached.

  • Page 118: Operating Via Azl2 Unit

    Operating via AZL2 unit 21.1 Description of unit / display and buttons Function and operation of unit versions AZL21 and AZL23 are identical. /reset h min s Figure 76: Description of unit / display and buttons Button Function Button F - For adjusting the fuel actuator (keep depressed and adjust the value by pressing...

  • Page 119: Meaning Of Symbols On The Display

    21.2 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 77: Meaning of display 21.3...

  • Page 120: Special Functions

    21.4 Special functions 21.4.1 Manual lockout Press simultaneously with any other /reset button. The LMV27 switches instantly to the lockout position, irrespective of the operating position. /reset The display shows the fault status message. plus other button Refer to chapter Error code list!) Display: Loc: 167 The reset must be carried out as follows: When...

  • Page 121: Manual Control (Manual Request For Output)

    21.4.2 Manual control (manual request for output) Burner is in operation. The display shows oP: on the left, the percentage of the current output on the right. h min s Example: oP: 20.0 Press for 1 s. The display shows LoAd:, the current output flashes.

  • Page 122: Timeout For Menu Operation

    21.5 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 123: Backup

    21.6.1 Backup Parameter 000: flashes. Display: Parameter 000: flashes, Int does not. /reset Press to select parameter 050 Display: Parameter 050. flashes, index 00: and value 0 do not. /reset Press to select parameter bAC_UP /reset Display: Parameter bAC_UP /reset Press to select the backup process.
  • Page 124 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 125: Restore

    21.6.2 Restore Parameter 000: flashes. Display: Parameter 000: flashes, Int does not. /reset Press to select parameter 050 Display: Parameter 050. flashes, index 00: and value 0 do not. /reset Press to go to parameter bAC_UP. /reset Display: Parameter bAC_UP Press to go to the rEStorE function.
  • Page 126 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 LMV27, the latter compares the burner identification and product no.

  • Page 127: Operation Of Lmv27 Via The Azl2

    Operation of LMV27 via the AZL2 22.1 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. 22.1.1 Display in standby mode LMV27 is in standby mode.

  • Page 128: List Of Phase Displays

    22.1.2.3. 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 Ph35 Run the fan to ignition speed Ph36...

  • Page 129: Display Of Operating Position

    22.1.3 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 mode: Current heating stage h min s Display oP: P1 stands for Stage 1. Multistage mode: Current heating stage h min s Display oP: P2 stands for Stage 2.

  • Page 130: Fault Status Message, Display Of Errors And Info

    22.1.4 Fault status message, display of errors and info 22.1.4.1. Display of errors (faults) with lockout The display shows Loc:, the bar under the fault status message appears. The LMV27 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 131: Error With Safety Shutdown

    22.1.4.4. Error with safety shutdown The display shows Err:. The LMV27 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 22.1.4.5.

  • Page 132: Menu-Driven Operation

    Menu-driven operation 23.1 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 133: Info Level

    24 Info level 24.1 Display of info level Press until InFo appears. /reset /reset 1…3 s When releasing , you are on the info level. /reset The info level displays information about the LMV27 and about operation in general.  Note On the info level, you can press to display the next or the previous parameter.

  • Page 134: Display Of Info Values (Examples)

    24.2 Display of info values (examples) 24.2.1 Identification date The identification date described below corresponds to the creation date for the program sequence and cannot be changed by the user. The display shows parameter 102: flashing on the left, characters ._._ on the right. Example: 102: ._._ h min s …...

  • Page 135: Burner Identification

    24.2.3 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 136: Number Of Startups Resettable

    24.2.4 Number of startups resettable  Note! Can be deleted for service refer to chapter Parameter list! The display shows parameter 164: flashing on the left, characters ._._ on the right, since display of the number of startups may comprise more than 5 digits.

  • Page 137: Total Number Of Startups

    24.2.5 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: ._._ …...

  • Page 138: Service Level

    Service level The service level is used to display information about errors including the error history and information about the LMV27.  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 139: Display Of Service Values (Example)

    25.2 Display of service values (example) 25.2.1 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.

  • Page 140: Parameter Level

    The OEM is obliged to mark the LMV27 accordingly and to include at least the list of device parameters and settings in the burner’s documentation. Siemens also recommends attaching an additional mark on the LMV27 in the form of an adhesive label. According to EN 298, the label should be easy to read and wipeproof.

  • Page 141: Entry Of Password

    26.1 Entry of password  Note The OEM’s password must consist of 5 characters, the heating engineer’s of 4 characters. Press button combination to display CodE. h min s When releasing the buttons, 7 bars appear the first of which flashes. Press to select a number or letter.
  • Page 142 As a confirmation of correct entry, PArA appears for maximum 2 seconds. h min s  Note For entry of passwords or burner IDs, the following numbers and letters can be used: 142/219 Building Technologies Basic Documentation LMV27... CC1P7541en 26 Parameter level 17.12.2018...

  • Page 143: Entry Of Burner Identification

    26.2 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 144 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 144/219 Building Technologies Basic Documentation LMV27... CC1P7541en 26 Parameter level 17.12.2018...

  • Page 145: Change Of Heating Engineer's Password

    26.3 Change of heating engineer’s password Note!    ’ For the OEM to change the heating engineer s password, c: requires entry of the OEM password! Press button combination to display 000: Int.   >1 s Pressing the button takes you to parameter /reset 041 heating engineer's password.

  • Page 146: Change Of Oem's Password

    26.4 Change of OEM’s password Parameter 042: flashes. Press to go to level c: for password changes. /reset Letter n: for new appears flashing. 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 confirmed by pressing /reset...

  • Page 147: Use Of Parameter Level

    26.5 Use of parameter level The parameters stored in the LMV27 can be displayed and changed on the parameter level. Normally, all parameters have been set by the burner manufacturer – with the exception of those for the fuel train and for air-fuel ratio control. A description of parameter level 400, which is used for setting the fuel train and the fuel- air ratio curve, is given in chapter Fuel / air ratio curves –...

  • Page 148: Structure Of Parameter Levels

    26.6 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 149: Parameters Without Index, With Direct Display

    26.7 Parameters without index, with direct display 26.7.1 Using the example of parameter 208: Program stop PArAmeter level 200: for LMV27. Press to go to menu /reset level 200: /reset Press to select Program stop. Display: Parameter 208: flashes, value 0 does not.
  • Page 150   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 is adopted. Display: Parameter 208: flashes, value 0 does not.

  • Page 151: Parameters Without Index, With No Direct Display (With Parameters Having A Value Range > 5 Digits)

    26.8 Parameters without index, with no direct display (with parameters having a value range > 5 digits) 26.8.1 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 152   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 153: Parameter With Index, With Direct Display

    26.9 Parameter with index, with direct display 26.9.1 Using the example of parameter 501: No-flame positions fuel actuator PArAmeter level 500: for fuel / air 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 154   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, The value set will be adopted. index 01: flashes, value 0.0 has not changed and does not flash.

  • Page 155: Parameters With Index, With No Direct Display

    26.10 Parameters with index, with no direct display 26.10.1 Using the example of parameter 701: Errors Refer to chapter Error code list!  Note Can be deleted for service, refer to chapter Parameter list! HIStory 700: for error history. h min s Press to go to the /reset...
  • Page 156 /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 157 Back to the previous To the next parameter parameter. /reset <1 s 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 158: Fuel / Air Ratio Curves - Settings And Commissioning

    26.11 Fuel / air ratio curves – settings and commissioning The display shows 400: flashing on the left, SEt appears on the right. h min s 26.11.1 Initial commissioning An unprogrammed LMV27 or a LMV27 whose operating mode has been reset or changed displays OFF UPr.
  • Page 159  Note Ensure that the fuel train is correctly set in compliance with the type of burner used. Parameter Actuator controlled Burner operating mode (fuel train, modulating / multistage, Fuel actuators, etc.) ● ● -- = undefined (delete curves) ● ●...
  • Page 160 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 161: Setting Curvepoints P0 And P9 For Modulating Mode

    26.11.2 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 162: Setting Curvepoints P0 And P9 For "G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu

    Press simultaneously to adjust speed n0 of the load controller. s min % Example: 20.0 Release The selected value will be adopted. Example: 20.0 s min % To the next curvepoint Press P9 appears blinking. Curvepoint for high-fire. h min s Same procedure as with P0 Note! ...

  • Page 163: Warm Settings For Modulating Mode

    26.11.4 Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo 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 164 Wait until the burner is operating and symbol 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 is no longer highlighted.
  • Page 165 Starting the warm settings Ignition position P0 can only be set when symbol is no longer highlighted. For fuel, keep depressed, for air Press to adjust the value. h min s When symbol is no longer highlighted, the next curvepoint P1 can be selected with Low-flame position P1 can only be set when symbol...
  • Page 166 Fuel Curvepoints Figure 82: Setting the curvepoints  Note Curvepoints P2 to P8 are automatically calculated as a straight line between P1 and Example 1 = gas modulating P0, P1 and P9 are set as described: Curvepoint Value 1 Value 2 fuel 30.0 22.0...
  • Page 167 Continue the same way with P2 through P9! High-fire position P9 can only be set when symbol is no longer highlighted. If required, readjust the gas pressure. For fuel, keep depressed, for air Press to adjust the value. When symbol is no longer h min s highlighted, the next curvepoint P8 can be...

  • Page 168: Warm Settings For Modulating Mode ("G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu")

    When symbol 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 LMV27 are now completed. 26.11.5 Warm settings for modulating mode («G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu») Note ...

  • Page 169: Cold Settings For "G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu

    26.11.7 Cold settings for «G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu» Note Refer to chapter Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2  mod» and «Lo mod»)! With no flame, however, no actuator travel and no automatic operation after the settings have been made.

  • Page 170: Editing The Curvepoints

    26.11.8 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.

  • Page 171: Interpolation Of Curvepoints

    26.11.9 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 172 Press to change the value as required. Example: 00.0 s min % Release The required value will be 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 173 >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 174: Setting Of Curvepoints For Multistage Mode ("Lo 2 Stage" And "Lo 3 Stage")

    26.11.10 Setting of curvepoints for multistage mode («Lo 2 stage» and «Lo 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 175: Warm Settings For "Lo 2 Stage" And " Lo 3 Stage

    26.11.11 Warm settings for «Lo 2 stage» and « Lo 3 stage» Identification of start for setting the curve parameters. h min s Provided the load 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 176 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 is no longer highlighted. Keep depressed.
  • Page 177 Low-fire position P1 can be set only when symbol is no longer highlighted. Set stage 1 P1. Fuel valve V1 is switched on. Keep depressed. Press to adjust the value. h min s When symbol is no longer highlighted, the next curvepoint P2on can be selected with To the next curvepoint Curvepoint P2on can be set only when...
  • Page 178 Back to the previous To the next curvepoint curvepoint. Curvepoint P2 can only be adjusted when symbol is no longer highlighted. Fuel valve V2 will be switched on. Keep depressed. Press to adjust the value. h min s When symbol is no longer highlighted, the next curvepoint P2of can be selected with...

  • Page 179: Cold Settings For Multistage Mode ("Lo 2 Stage" And " Lo 3 Stage")

    h min s The warm settings for air-fuel ratio control of the LMV27 have now been configured. 26.11.12 Cold settings for multistage mode («Lo 2 stage» and « Lo 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 180: Intensity Of Flame During Curve Settings

    26.11.13 Intensity of flame during curve settings When setting the curve and the curvepoint is displayed, you can press to show the intensity of flame. /reset When pressing the button for >1 s, a change to parameter 954 is made; when releasing the button, you return to the curvepoint.

  • Page 181: Parameter List

    27 Parameter list Abbreviations for password level: Building automation Heating engineer HF (GA) Heating engineer (building automation) Info / service Manufacturer of the individual product Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read...
  • Page 182 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Index 1 = output external load controller analog Index 2 = Power of external load controller contacts Start loss-of-flame test (TÜV test) (set parameter to 1) Std_s8 Edit (shutdown of fuel valves ...
  • Page 183 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Setting of parity for Modbus communication Selection Edit 0 = none 1 = odd 2 = even Default output if communication with building automation is Output Edit / clear 100%...
  • Page 184 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read 2...4 = 1...3 repetitions Recharging time: Entering into operation Repetition limit air pressure failure Std_u8 Edit 1 = no repetition 2 = 1 repetition 3 = 2 repetitions Recharging time: End of Shutdown phase...
  • Page 185 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read 19 = G mod gas actuator only 20 = Gp1 mod gas actuator only 21 = Gp2 mod gas actuator only 22 = Lo mod oil actuator only 23 = Ho mod separate circulation control ¹) 24 = Ho 2-stage separate circulation control ¹) 25 = Ho mod.
  • Page 186 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read switch signal (e.g. home run, preignition) Gas: Active detector flame evaluation Selection Edit 0 = QRB / QRC 1 = ION / QRA Gas: Prepurging Selection Edit...
  • Page 187 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read 4 = not used Repetition limit loss of flame Std_u8 Edit 1 = no repetition 2 = 1 repetition Recharging time: After the Operation phase 1 ...
  • Page 188 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Oil: Interval 2 Time Edit 0,4 s 60 min 0,2 s Oil: Afterburn time Time Edit 0,2 s 60 s 0,2 s Oil: Postpurge time Time Edit...
  • Page 189 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Index 1 = prepurge position 0° Index 2 = postpurge position 15° No-flame positions air actuator Std_s16 Edit 0° 90° 0,1° Index Value Index 0 = home position 0°...
  • Page 190 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Setting values: 0 = standard 1 = range stop in the usable range 2 = internal range stop (SQN1) 3 = both Type of actuator Std_u8 Edit...
  • Page 191 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read Index 1 = air Active load controller source Selection Read only 1 = output during curve settings 2 = manual output 3 = default output via building automation 4 = default output via analog input 5 = external load controller via contacts Result of contact sensing (bit-coded)
  • Page 192 Par. Parameter Number of Type Edit Value range Increment Default Password level elements Min. Max. setting Write Read ACS410 Error memory: Code Std_u8 read only For query ACS410 Error memory: Diagnostic code Std_u8 read only For query ACS410 Error flags Hex_32 Reset 0xFFFFFFFF...

  • Page 193: Error Code List (Of All Lmv2 / Lmv3 Types)

    28 Error code list (of all LMV2 / LMV3 types) Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code No communication between LMV27 and AZL2 Check wiring for open-circuit / loose contact Comm No flame at the end of first safety time No flame at the end of first safety time No flame at the end of second safety time ...
  • Page 194 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Diagnostics corresponds to the period of time from shutdown of fuel valves to the detection of loss 3...255 Loss of flame due to TÜV test (loss-of-flame test) of flame (increment 0.2 seconds  value 5 = 1 second) Valve proving With valve proving via X5-01 (gas pressure switch-min) - Check if valve on the burner side is leaking...
  • Page 195 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Pressure switch-max / POC Check wiring to see if there is a line interruption. Pressure switch-max : Max. gas / oil pressure exceeded  POC: Check to see if the valve’s closing contact is closed. POC: POC open (software version V02.00) Check wiring...
  • Page 196 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Check that the oil is preheated correctly Internal error Make a reset; if error occurs repeatedly, replace the LMV27 Internal error Make a reset; if error occurs repeatedly, replace the LMV27 Internal error Make a reset;...
  • Page 197 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code LMV27: Optional press reset button >3 seconds. Internal error Make a reset; if error occurs repeatedly, replace the LMV27 Internal error Make a reset; if error occurs repeatedly, replace the LMV27 Internal error Make a reset;...
  • Page 198 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code 4. VSD does not follow quickly enough the changes of the LMV27. Check settings of the VSD (input filter, slippage compensation, hiding different speeds) VSD speed was too high Control range limitation at the bottom VSD speed was too low Control range limitation at the top...
  • Page 199 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code  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. after restoring a data set to a new LMV27) Speed deviation µC1 + µC2 →...
  • Page 200 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Curve slope max. 10% for LMV27 ramp of 20 seconds (20% for 10 seconds or 40% for 5 seconds) 2. Modulating operating ramp 48 seconds Curve slope max. 10% for LMV27 ramp of 30 seconds (20% for 15 seconds or 30% for 10 seconds) 3.
  • Page 201 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Check speed differential between the curvepoints and the modulating operating ramp setting (parameter 544). 1. Modulating operating ramp 32 seconds Curve slope max. 10% for LMV27 ramp of 20 seconds (20% for 10 seconds or 40% for 5 seconds) 2.
  • Page 202 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code 1. Check the setting of the actuator type (parameter 613.1) 2. Check to see if actuators have been mixed up 3. Check to see if actuator is locked or overloaded Parameterization of an actuator (e.g.
  • Page 203 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Internal error LMV27 Error flame signal acquisition Short-circuit at QRB Short-circuit of sensor 1. Check wiring. 2. Flame detector possibly faulty. Error relay supervision 3 Ignition transformer 4 Fuel valve V1 Check wiring External power supply active contact 5 Fuel valve V2...
  • Page 204 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code diagnostic code indicates the input where the problem occurred 1 Pressure switch max / POC 2 Pressure switch valve proving 3 Air pressure 4 Load controller open 5 Load controller on/off 6 Load controller close 7 Safety loop / Burner flange 8 Safety valve...
  • Page 205 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code 9 Ignition transformer 10 Fuel valve V1 11 Fuel valve V2 12 Fuel valve V3 13 Reset Internal error contact request Make a reset; if error occurs repeatedly, replace the LMV27 0 Pressure switch min 1 Pressure switch max / POC 2 Pressure switch valve proving...
  • Page 206 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Make a reset, repeat last parameterization / check. Restore the parameter set, if error occurs Internal error EEPROM access repeatedly, replace the LMV27 Internal error EEPROM read access Make a reset, repeat last parameterization / check.
  • Page 207 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Define burner identification and repeat backup 251 (-5) Backup – burner identification is not defined Repeat reset and backup 252 (-4) After restore, pages still on ABORT Repeat reset and backup 253 (-3) Restore cannot at present be made Repeat reset and backup...
  • Page 208 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code incorrectly. Trim function at lower limit Trim function at upper limit Fuel 1: Trim function at lower limit Fuel 1: Trim function at upper limit Test value of the analog input is outside the tolerance range Trim function: Analog input test 1.
  • Page 209 Error Diagnostic code Meaning for the LMV27 Recommended measures or causes code Carry out speed standardization. Bit 3 If no speed signal is present in pneumatic operation, the parameters 667, 668, 669.0 / 669.1 must Standardized speed undefined Valency 8..15 be set to invalid to switch off the start prevention.

  • Page 210: Revision History Lmv27

    Revision history LMV27 Software version V01.20 Software changes  Optimizations regarding ACS410 (backup / restore)  Faster parameterization with AZL2 (3-stage)  Burner identification setting (entering the password)  Optimization: LMV27 hooks itself up in phase 38  Optimization: Cold setting via P0 (adoption P0  P1, correct CALC function) ...
  • Page 211 Software version V01.90  Scaling of analog input changed (no burner OFF functionality)  Optimization: Variable step width between ignition and low-fire (40% difference in speed, independent of ramp time; traveling time varies between 4 and 16 seconds with a 5- to 20-second ramp) ...
  • Page 212 Software version V03.00  Optimization: Maximum time of safety phase reduced from 28 to 27 seconds Software version V03.10  Optimization: If power supply fails during the restore process, the data set can be repaired by starting a new restore process (since the backup / restore option is not yet available with V03.00 because there is no suitable AZL2, this effect cannot occur) ...
  • Page 213 Software version V03.70  Optimization: No locking with C:75 via asynchronous load controller source  Extension: Support of PWM fans and symmetrical feedback  Extension: Increase in the maximum speed to 14000 rpm  Extension: Additional monitoring of the minimum prepurge speed, maximum ignition speed and minimum speed / maximum speed during operation ...
  • Page 214 Index Operation ........127 A  Parameter level ......140 ACS410 ........... 114 Parameter level structure ..148 Display / diagnostics ....33 Parameter level use ....147 Actuators X53 / X54 ......98 Parameter with index / with direct Angles ......... 98 display ........
  • Page 215 X8-02 / X7-01 ....... 47 Traveling speed ....89, 95 X8-04 pin 2 ........47 Traveling speed / curve slope ... 92 Dimensions ........32 I  Display / diagnostics ....... 33 Inputs / outputs E  X10-05 / X10-06 ......33 Error code list ........
  • Page 216 Q  Lo / Lo mod / Lo 2-stage / Lo 3- stage ........... 74 Technical data ......28 Special features ......112 Special functions Technical data ......29 Alarm / start prevention .... 54 QRB4 Continuous fan ......60 Technical data ......30 Forced intermittent operation ..

  • Page 217: List Of Figures

    30 List of figures Figure 1: Note on mounting ................... 10   Figure 2: Electrical connection ..................12   Figure 3: Connection of OCI410 interface to the BCI ............ 13   Figure 4: System structure .................... 20   Figure 5: Ionization input at AC 230 V ................27  ...
  • Page 218 Figure 36: Gas direct ignition ..................63   Figure 37: Gas pilot ignition 1 ..................63   Figure 38: Gas pilot ignition 2 ..................63   Figure 39: Gas trains – fuel valve control ..............64   Figure 40: Light oil - direct ignition 1-stage ..............65  ...
  • Page 219   Figure 82: Setting the curvepoints ................166   Figure 83: Changing several curvepoints ..............173   Siemens AG Building Technologies © 2018 Siemens AG Building Technologies Berliner Ring 23 Subject to change! D-76437 Rastatt Tel. 0049-7222-598-279 Fax 0049-7222-598-269 www.siemens.com...

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