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Siemens LMV37.4 Series Basic Documentation
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Siemens LMV37.4 Series Basic Documentation

Basic unit with integrated air-fuel ratio control for forced draft burners
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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
V03.10
CC1P7546en
Building Technologies
01.12.2009
HVAC Products

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Summary of Contents for Siemens LMV37.4 Series

  • 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 V03.10 CC1P7546en Building Technologies 01.12.2009 HVAC Products...
  • Page 2 2/213 Building Technologies Basic Documentation LMV37.4... CC1P7546en HVAC Products 01.12.2009...
  • Page 3 Supplementary documentation User Documentation Modbus AZL2................A7541 Environmental Product Declaration LMV2… / LMV3..........E7541 Installation and Operating Instructions PC Software ACS410 ........J7352 Product Range Overview LMV2… / LMV3..............Q7541 3/213 Building Technologies Basic Documentation LMV37.4... CC1P7546en HVAC Products 01.12.2009...
  • Page 4 4/213 Building Technologies Basic Documentation LMV37.4... CC1P7546en HVAC Products 01.12.2009...

  • Page 5: Table Of Contents

    Contents Safety notes ...................... 12 Warning notes ....................12 Mounting notes....................13 Note on mounting .................. 13 − Installation notes ....................14 Electrical connection of the LMV37.4............... 15 Electrical connection of flame detectors............16 Commissioning notes ..................16 Air-fuel ratio control system..............16 −...
  • Page 6 6.2.3 No flame at the end of safety time 1 (TSA1).............32 6.2.4 Flame intensity ....................32 6.2.5 Supervision of flame detector ................33 Digital inputs ......................34 6.3.1 Safety loop X3–04, terminals 1 and 2 ...............34 6.3.2 (Burner flange) X3–03, terminals 1 and 2 ............35 6.3.3 Input for external controller (ON / OFF) X5–03, terminal 1......35 6.3.4...
  • Page 7 Fuel valve control program ..............59 − Light oil direct ignition, multistage............60 − (Operating mode 5, 17)................. 60 − (Operating mode 5, 17)................. 60 − (Operating mode 6, 18)................. 60 − Light oil direct ignition, modulating............61 − (Operating mode 4, 22)................. 61 −...
  • Page 8 9.3.6 Setting the minimum and maximum output ............83 Multistage operation ...................84 9.4.1 Definition of curves .....................84 9.4.2 Running speed....................84 9.4.3 Adjustment of output...................85 9.4.4 Changing to the running position...............85 9.4.5 Running position ....................85 9.4.6 Restriction of the modulation range..............86 End of running position..................86 Setting and parameter setting notes ..............87 Actuators X53 / X54 ..................88 10.1...
  • Page 9 Power output X74.3..................108 12.1 Safe separation of mains voltage and extra low-voltage ......108 12.2 Modulating operation ..................108 12.3 2-stage operation ..................... 108 12.4 3-stage operation ..................... 109 Fuel meter input X75.1 / X75.2 ..............110 13.1 Configuration of fuel meter................110 13.1.1 Types of fuel meters ..................
  • Page 10 22.1.2.2. Display of program phase with remaining running time until end of the phase is reached ......................129 22.1.2.3. List of phase displays ..................130 22.1.3 Display of operating position................131 22.1.4 Fault status message, display of errors and info........... 132 22.1.4.1.
  • Page 11 26.10.1 Using the example of parameter 701: Errors..........154 26.11 Air-fuel ratio curves – settings and commissioning ........157 26.11.1 Initial commissioning..................157 26.11.2 Setting curvepoints P0 and P9 for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo mod») ................160 26.11.3 Setting curvepoints P0 and P9 for «G mod pneu», «Gp1 mod pneu»...

  • Page 12: Safety Notes

    Safety notes Warning 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. Sie- mens does not assume responsibility for damage resulting from unauthorized in- terference! The chapters covering the LMV37.4...

  • 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 oc- cur, 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 compo- nents 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 check- • Air pressure • Minimum gas pressure / maximum gas pressure or POC • Gas pressure valve proving • Minimum oil pressure and maximum oil pressure •...

  • Page 18: Setting And Parameter Setting Notes

    The default pass- words used by Siemens must be changed by the OEM. These passwords are confi- dential and may only be given to persons authorized to access such setting levels •...

  • Page 19: Standards And Certificates

    F T / M C L B B Service notes • If fuses are blown, the unit must be returned to Siemens (refer to section Warn- ing notes) 1.10 Life cycle Burner management system type 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 Make-Up / Function Description

    System make-up / 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: •...

  • Page 21: General

    2.3 General The burner management system is operated and parameterized either via the AZL2… display and operating unit or with the help of the PC tool. The AZL2… with LCD and menu-driven operation facilitates straightforward use and targeted diagnostics. When making diagnostics, the display shows 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: • Nominal 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: Cable Lengths

    4.1.4 Cable lengths • Mains line AC 120 V / AC 230 V Max. 100 m (100 pF/m) • Display, BCI For used under the burner cover or the control panel Max. 3 m (100 pF/m) • Load controller (LR) X5-03 Max.

  • Page 25: Environmental Conditions

    4.3 Environmental conditions Storage DIN EN 60721-3-1 Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range -20...+60 °C Humidity <95 % r.h. Transport DIN EN 60721-3-2 Climatic conditions Class 2K2 Mechanical conditions Class 2M2 Temperature range -30...+60 °C Humidity <95 % r.h.

  • Page 26: Flame Detectors

    4.4 Flame detectors 4.4.1 Ionization probe For continuous operation! No-load voltage at ION terminal Approx. U Mains (X10–05 terminal 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 27: Uv-Flame Detectors Qra2

    4.4.2 UV-Flame detectors QRA2… / QRA4.U / QRA10… Caution! If flame detectors type QRA2… / QRA4.U / QRA10... are used for flame supervi- sion 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 28: Photoresistive Detectors Qrb

    4.4.3 Photoresistive detectors QRB… No-load voltage at QRB... terminal Approx. DC 5 V (X10–05 terminal 3) Max. perm. length of QRB... detector 3 m (wire – wire 100 pF/m) cable (laid separately) Note A detector resistance of RF <500 Ω is identified as a short-circuit and leads to safety shutdown in operation as if the flame had been lost.

  • Page 29: 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 4: LMV37.4...: Dimension 29/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 5 Dimensions 01.12.2009...

  • Page 30: Basic Unit

    Basic unit 6.1 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 Sequence diagrams. LMV... Flame signal input and flame detector X10–05 and X10–06 QRB...

  • Page 31: Flame Detectors

    6.2 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 devia- ± tions 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 32: Loss Of Flame

    6.2.1 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 after how many losses of flame the unit shall initiate lockout (refer to subsection Repetition counter). Error Diagnostic Meaning for the LMV37.4...

  • Page 33: Supervision Of Flame Detector

    6.2.5 Supervision of flame detector Error Diagnostic Meaning for the LMV37.4... system code code Short-circuit of sensor At the QRB… / QRC… flame detector’s input, the LMV37.4... checks the detector for short-circuits in operation. 33/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 6 Basic unit...

  • Page 34: Digital Inputs

    6.3 Digital inputs 6.3.1 Safety loop X3–04, terminals 1 and 2 Input for 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 following contacts are included in the safety loop: External burner switch (ON / OFF) −...

  • Page 35: Burner Flange) X3-03, Terminals 1 And 2

    6.3.2 (Burner flange) X3–03, terminals 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/0409 Figure 8: Burner flange X3-03 For error diagnostics and parameters, refer to subsection Safety loop.

  • Page 36: Air Pressure Switch (Aps) X3-02

    6.3.5 Air pressure switch (APS) X3–02 Input for connection of an air pressure switch. Air pressure is anticipated after the fan has been 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 37: Pressure Switch Valve Proving Gas (P Lt) X9-04

    6.3.6 Pressure switch valve proving gas (P LT) X9–04 Input for the pressure switch valve proving (P LT) X9-04. The input is active only when operating on gas and when valve proving is activated (see program sequence). Parameter Gas: Execution valve proving 0 = no valve proving 1 = valve proving on startup 2 = valve proving on shutdown...

  • Page 38: Pressure Switch-Min-Gas (Pmin) / -Min-Oil, Start Release Gas X5-01

    6.3.7 Pressure switch-min-gas (Pmin) / -min-oil, 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 between terminal 2 and terminal 3 must be fitted. Pressure switch-min-gas In all types of gas trains, the minimum gas pressure is expected from phase 22.

  • Page 39: 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 (P236), function „Start release gas“...

  • Page 40: Pressure Switch-Max-Gas (Pmax) / Or Poc Contact / Max-Oil, Start Release Oil X5-02

    6.3.9 Pressure switch-max-gas (Pmax) / or POC contact / max-oil, 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 41 Pressure switch-max-oil 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 (P214) has elapsed, or dur- ing the subsequent phases, the system initiates lockout. Parameter Max.

  • Page 42: Reset X8-04, Terminal 1

    6.3.10 Reset X8-04, terminal 1 Input for connection of a reset button. The basic unit can be reset or manually locked via this input (refer to subsection Reset / manual locking). Resetting / manual interlocking Bild 393e/1109 Figure 15: Reset X8-04 42/213 Building Technologies Basic documentation LMV37.4...

  • Page 43: Digital Outputs

    6.4 Digital outputs Safety-related outputs, type SI Using a contact feedback network (CFN), these contacts are read back by the micro- computers and checked for their correct positions. Non-safety-related outputs, type No-SI These outputs are not monitored by the 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 44: Output Ignition (Z), Type Si (Ignition) X4-02

    6.4.4 Output ignition (Z), type SI (IGNITION) X4–02 LMV... Ignition (Z) Protective earth (PE) Bild 285e/0409 Figure 19: 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 45: Outputs Fuel Valves, Type Si (V1

    6.4.5 Outputs fuel valves, type SI (V1...V3 / PV) X8–02, X7-01, X7- LMV... Protective earth (PE) Auxiliary terminal V1 for series connection of two AC 115 V valves Fuel valve 1 (V1) Bild 286e/0409 Figure 20: Output fuel valve (V1) X8-02 LMV...

  • Page 46: Program Sequence

    6.5 Program sequence The program sequence is shown in the form of sequence diagrams (refer to section Fuel trains). Using a number of parameters, the program sequence can be adapted to the re- spective application. 6.5.1 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 47: Valve Proving

    6.5.2 Valve proving Valve proving is only active when firing on gas. This is a valve proving designed to de- tect leaking gas valves and, if necessary, to prevent the valves from opening or ignition from being switched on. Lockout is initiated. When performing valve proving, the gas valve on the burner side is opened first to bring the test space to atmospheric pressure.

  • Page 48: 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 appli- cation). 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 49: Valve Proving Via Pressure Switch-Min-Gas X5-01

    6.5.2.2. Valve proving via pressure switch-min-gas X5-01 When performing valve proving, the gas valve on the burner side is opened first to bring the test space to at- mospheric pressure. Then, the valve is closed where- upon the pressure in the test space must not exceed a certain level.

  • Page 50: Special Functions During The Program Sequence

    6.5.3 Special functions during the program sequence 6.5.3.1. 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 51: Alarm Upon Start Prevention

    3. Resetting via the PC tool Refer to the documentation on the PC tool (J7352). Error Diagnostic Meaning for the LMV37.4... system code code Manual lockout by PC tool 6.5.3.2. Alarm upon start prevention If start prevention occurs, the display of the AZL2... shows it. Start prevention takes place only when a heat request is delivered and one of the startup criteria is not fulfilled.

  • Page 52: Possible Start Preventions

    6.5.3.3. Possible start preventions Within 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 53: Repetition Counter

    6.5.3.4. 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 af- ter the first 3 errors, and after the third error, the system initiates lockout.
  • Page 54 Functions with fixed repetition counters These counters cannot be set. Settings Meaning Unit Basic setting Number of repetitions in the event of error: Speed standardization VSD Speed error Referencing error actuator Positioning error actuator Recharging time: End of Shutdown phase Number of repetitions in the event of error: Relay Relay control...

  • Page 55: Start Without Prepurging (As Per En 676)

    6.5.3.5. Start without prepurging (as per EN 676) When using valve proving and 2 fuel valves of class A, prepurging is not required (con- forming 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 56: Program Stop Function

    6.5.3.7. 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 commis- sioned (refer to chapter Air-fuel ratio control settings).

  • Page 57: Continuous Fan

    6.5.3.10. Continuous fan For burners that can be damaged by heat (e.g. several burners using the same combus- tion chamber), continuous purging may be required. In that case, the fan operates in all phases. For that purpose, the fan motor contactor is to be connected to X3-05, terminal 3, tapped after the unit fuse and the safety loop.

  • Page 58: Test Function For Approval Of Burner - Loss-Of-Flame Test (Tüv Test)

    6.5.3.11. 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 period of time (resolution of 0.2 seconds) until the basic unit detects loss of flame.

  • Page 59: Fuel Trains (Application Examples)

    6.6 Fuel trains (application examples) Gas direct ignition (Operating mode 1, 7, 14, 19) Program Direct ignition 7546s01e/0208 Gas pilot ignition 1 (Operating mode 2, 8, 15, 20) Program Gas pilot 7546s02e/0208 Gas pilot ignition 2 (Operating mode 3, 9, 16, 21) Program Gas pilot ´P...

  • Page 60: Light Oil Direct Ignition, Multistage

    1-stage burner Light oil direct ignition, multistage Program (Operating mode 5, 17) 7546s04e/1107 2-stage burner (Operating mode 5, 17) Program 7546s05e/1107 3-stage burner (Operating mode 6, 18) Program 7546s06e/1107 60/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 6 Basic unit 01.12.2009...

  • Page 61: Light Oil Direct Ignition, Modulating

    Modulating burner (without shutdown facility for adjustable head) Light oil direct ignition, modulating Program (Operating mode 4, 22) 7546s07e/1107 Modulating burner (with shutdown facility for adjustable head) Program (Operating mode 4, 22) 7546s08e/1107 Light oil (transformer direct ignition) Fuel valve control program TSA1 TSA2 Operation...

  • Page 62: Light Oil Direct Ignition Modulating With 2 Fuel Valves

    Modulating burner (without shutdown facility for adjustable head) Light oil direct ignition modulating with 2 fuel valves (Operating mode 12) LO-2V Program Modulating burner (with shutdown facility for adjustable head) (Operating mode 12) LO-2V Program Light oil (transformer direct ignition) Fuel valve control program LO-2V 62/213...

  • Page 63: Sequence Diagrams

    6.7 Sequence diagrams The phase numbers given in the diagram can be read from the following process data: Parameter Phase (state of external module and display) 63/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 6 Basic unit 01.12.2009...

  • Page 64: Gas Direct Ignition "G Mod", "G Mod Pneu

    6.7.1 Gas direct ignition «G mod», «G mod pneu» 30 s Control thermostat or pressurestat (R) ON Air pressure switch (LP) Pressure switch - valve proving (P LT) POC (alternativ to pressure switch-max (Pmax) Fan motor (M) Ignition transformer (Z) Fuel valve 1 (V1) Fuel valve 2 (V2) Alarm (AL)

  • Page 65: Gas Pilot Ignition 1 "Gp1 Mod", "Gp1 Mod Pneu

    6.7.2 Gas pilot ignition 1 «Gp1 mod», «Gp1 mod pneu» 30 s Control thermostat or pressurestat (R) ON Air pressure switch (LP) Pressure switch - valve proving (P LT) POC (alternativ to pressure switch-max (Pmax) Fan motor (M) Ignition transformer (Z) Fuel valve 1 (V1) Fuel valve 2 (V2) Alarm (AL)

  • Page 66: Gas Pilot Ignition 2 "Gp2 Mod", "Gp2 Mod Pneu

    6.7.3 Gas pilot ignition 2 «Gp2 mod», «Gp2 mod pneu» 30 s Control thermostat or pressurestat (R) ON Air pressure switch (LP) Pressure switch - valve proving (P LT) POC (alternativ to pressure switch-max (Pmax) Fan motor (M) Ignition transformer (Z) Fuel valve 1 (V1) Fuel valve 2 (V2) Alarm (AL)

  • Page 67: Light Oil Direct Ignition "Lo Mod", "Lo 2-Stage", "Lo 3-Stage

    6.7.4 Light oil direct ignition «Lo mod», «Lo 2-stage», «Lo 3- stage» Control thermostat or pressurestat (R) ON Air pressure switch (LP) POC (alternativ to pressure switch-max (Pmax) Fan motor (M) Ignition transformer (Z) Fuel valve 1 (V1) Fuel valve 2 (V2) Alarm (AL) 0°...

  • Page 68: Legend To The Sequence Diagrams

    6.7.5 Legend to the sequence diagrams Valve proving takes place depending on the parameter: Between phase 62 and phase 70 or / and between phase 24 and phase 30 Parameter: Short / long preignition time for oil only Short / long oil pumps – switch-on time – time Only with valve proving on startup Parameter: With / without alarm in the event of start prevention...

  • Page 69: 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 – de- rived from parameter 201 – the most important settings relating to the operating mode are made automatically.
  • Page 70 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 Gp2 mod...

  • Page 71: Connection To Load Controllers

    Connection to load controllers The LMV37.4... system can be connected to different load controllers. The heat request and the required burner output are determined in accordance with the priorities of the different heat sources. 8.1 Controller on contact X5-03, terminal 1 This contact is given priority over all output sources.
  • Page 72 Multistage operation X5-03 (stage 2, terminal 3 / stage 3, terminal 2) In multistage operation, one 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 73 Shifting multistage operation (OPEN ▲ terminal 3 / CLOSE ▼ terminal 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 con- troller.

  • Page 74: Load Controller Via Building Automation X92

    8.3 Load controller via building automation X92 To control the LMV37.4... basic unit, the BAC system can predefine an output via a bus system. The BAC system is connected to the basic unit via the X92 interface. Burner startup can take place only when contact X5-03/1 is closed (load controller (LR) On / Off).

  • Page 75: Manual Output

    8.4 Manual output A manual output can be set with the «Normal display» of the display and operating unit or via the PC tool. Manual output via the display and operating unit Manual output can be activated or adjusted by keeping the F button depressed for at le- ast 1 second and by pressing the + or –...

  • Page 76: External Load Controller Via Analog Input X64.1 / X64.2

    8.6 External load controller via analog input X64.1 / X64.2 For the preselection of external outputs, an analog 4…20 mA input is provided. Burner startup can take place only when contact X5-03/1 is closed (load controller (LR) On / Off). A disruption of the current input or a current signal <3mA leads to deactivation of the Switching thresholds / analog input’s external preselected output.

  • Page 77: Prioritization Of Power Sources

    8.7 Prioritization of power sources To simplify configuration of the system, the power source need not be selected. The system automatically detects the available power sources and selects them. If several sources are used, they are selected according to the following priorities: Parameter 942 Priority Active power source...

  • Page 78: Electronic Air-Fuel Ratio Control

    Electronic air-fuel ratio control 9.1 General Electronic air-fuel ratio control is used for controlling the burner’s actuators depending on burner output. It is possible to connect 2 actuators and, optionally, one 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 79: Prepurging

    9.2.3 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 80: Modulating Operation

    9.3 Modulating operation In modulating mode, it is possible to operate 2 actuators and one VSD. 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 81: Running Speed / Maximum Curve Slope

    9.3.2 Running speed / maximum curve slope The time required to modulate from low-fire to high-fire is 32 seconds. In connection with the actuator’s ramp in the basic unit, the following maximum position- ing angles or speed changes between 2 curvepoints can be covered: Type of actuator Positioning speed Positioning angle...

  • Page 82: Restriction Of Modulation Range

    9.3.5 Restriction 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 new high-fire position. Parameter Lower output limit undefined = 20 % Upper output limit undefined = 100 % Figure 39: Restriction of modulation range...

  • Page 83: Setting The Minimum And Maximum Output

    9.3.6 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 modu- lating 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 84: Multistage Operation

    9.4 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 regulated via 2 or 3-stages. Modu- lation is accomplished by adjustment of the air actuator or of VSD and by switching the fuel valves for changing the amount of fuel delivered.

  • Page 85: Adjustment Of Output

    9.4.3 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 86: Restriction Of The Modulation Range

    9.4.6 Restriction of the 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 new high-fire position. Parameter Lower output limit undefined = 20 % Upper output limit undefined = 100 %...

  • Page 87: Setting And Parameter Setting Notes

    The parameter level is password-protected. The OEM assigns individual passwords for 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 con- fidential and may only be assigned to authorized staff •...

  • Page 88: Actuators X53 / X54

    10 Actuators X53 / X54 One or 2 actuators can be connected to the LMV37.4... system, depending on the se- lected 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 89: Referencing

    10.3 Referencing An incremental transducer is used to ensure position feedback. Hence, referencing of the actuators must be performed after power-on. In addition, at the end of each shut- down in phase 10, the actuators are referenced to ensure that individual stepping errors, which could lead to shutdown, do not accumulate.

  • Page 90: Reference Travel

    10.3.1 Reference travel Reference travel means that 2 different reference travels are performed, aimed at un- ambiguously determining the actuators’ permissible working range. This prevents the actuators from traveling to a range outside the optical feedback system or against a me- chanical stop should a power failure during referencing occur.
  • Page 91 Example of an actuator with counterclockwise rotation: When referencing in the CLOSED position, the actuator first travels a certain distance into the working range (towards the OPEN position). Then, it travels to a position repre- senting maximum -7.7°, thereby crossing the reference mark for the fist time. Then, the actuator moves in the other direction again and detects the inner ramp of the reference mark.

  • Page 92: Direction Of Rotation

    10.4 Direction of rotation With the SQM3…actuator, the direction of rotation can be selected on an individual ba- sis. 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...

  • Page 93: Monitoring The Positions

    10.5 Monitoring the positions To monitor the actuator’s actual positions, an optical incremental transducer with a reso- lution 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. Due to the different resolutions of motor steps and incremental transducer plus the selected tol- erance band, the following error identification band is obtained.

  • Page 94: Changing The Error Detection Band For Monitoring The Positions

    10.6 Changing the error detection band for monitoring the positions The error detection band can be changed via parameter 606. A change is to be made only when using SQN13.17… / SQN14.17… actuators which, due to their mechanical design, require greater tolerances. For these types of actuators, set parameter 606 to 2.2°.

  • Page 95: Protection Against Actuator Mixup

    10.9 Protection against actuator mixup Mixup of actuators can be detected through appropriate mounting (using different refer- ence marks for the air and fuel actuator: OPEN / CLOSED / 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 96: Fan Control

    11 Fan control 11.1 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 97: Vsd Control X74.3

    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 46: Connection of VSD to the LMV37.4...

  • Page 98: Ramp Time

    11.6 Ramp time The ramp time for PWM fan control can be set separately for acceleration and decel- eration (also refer to subsection Running speed / maximum curve slope ). Parameter Ramp up Ramp down If shutdown occurs because the speed has not been reached, the VSD / PWM fan might not be able to follow quickly enough the set ramp.

  • Page 99: Acquisition Of Speed

    11.7 Acquisition of speed 11.7.1 Acquisition of speed with proximity switch The actual speed is acquired by an inductive proximity switch which scans a metal sen- sor disk. The sensor disk must be attached directly to the motor’s drive shaft. Speed ac- quisition is safety-related.

  • Page 100: Acquisition Of Speed With Hall Generator

    Speed sensor Figure 48: Speed sensor Selection of fan motor Motor supplier: Selection of a motor with a 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). 11.7.2 Acquisition of speed with Hall generator If the speed is acquired via a Hall generator, the requirements for safety-related applica- tions are the same as those for the speed feedback signal via sensor disk.

  • Page 101: Speed Control

    11.8 Speed control The LMV37.4... controls the fan motor’s speed to the setpoint. To ensure that the actual speed can still be increased when the maximum is reached, the speed is standardized when the motor is controlled at 95%. Hence, with a speed setpoint of 100%, a speed in- crease of 5% is still possible.

  • Page 102: Parameterizing Of The Vsd

    11.10 Parameterizing of the VSD If the burner’s rated capacity is not reached at 95% (9.5 V) control, 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 103: Standardization Of Speed

    11.11 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»...
  • Page 104 6. 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 Recommended measures Timeout of standardization (VSD’s ramp Timeout at the end of standardization during ramp down time too long) down of VSD.

  • Page 105: Control Of Fan Motor With Pneumatic Air-Fuel Ratio Control

    Value Error Recommended measures Unplausible sensor signals The required pulse pattern (60°, 120°, 180°) has not been correctly identified. 1. Speed sensor does not detect all tappets of the sensor disk → check the distance. 2. As the motor turns, other metal parts are detected also, in addition to the tappets →...

  • Page 106: Emc Lmv37.4

    11.13 EMC LMV37.4... – VSD The function and EMC tests with the LMV37.4... system have been successfully con- ducted 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 107: Description Of The Terminals

    11.14 Description of the terminals 11.14.1 LMV... Power supply for speed sensor Speed input VSD control 24V EXT Bild 335e/0409 Figure 49: VSD module X74 11.14.2 PWM fan LMV... 24V EXT Bild 336/0309 Figure 50: PWM fan X74 LMV... Power supply for sensor Speed feedback PWM speed output Controller input 4...20 mA...

  • Page 108: Power Output X74.3

    12 Power output X74.3 The power output is only available as an alternative to VSD control. If the VSD is deacti- vated, 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 109: 3-Stage Operation

    12.4 3-stage operation Actual value Voltage Curvepoint Display / output val- Stage 1 Stage 2 Stage 3 10 V 109/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 12 Power output X74.3 01.12.2009...

  • Page 110: Fuel Meter Input X75.1 / X75.2

    13 Fuel meter input X75.1 / X75.2 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 X75.1 and X75.2. LMV...

  • Page 111: Fuel Throughput

    13.2 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”...

  • Page 112: Inputs And Outputs

    Supply for fuel counter Input fuel counter Shielding: For shielding the cables on the VSD, refer to: • Siemens SED2 VSD Commissioning Manual (G5192). chapter 4 and chapter 7 or • Danfoss Operation Manual VLT 6000 (MG60A703). chapter «Installation» VSD X74...

  • Page 113: Special Feature: Identification Of Burner (Id)

    15 Special feature: Identification of burner (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 dif- ferent burners (also refer to documentation on PC tool under Backup / Restore and in this documentation in chapter Backup / Restore ).
  • Page 114 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 Performance standard at interruption of communication with building automa- tion Setting values For modulation operation the setting range is as follows: 0…19.9 = burner off 20…100 = 20…100% burner rating...

  • Page 115: Modbus

    16.2 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 116: Pc Software Acs410

    17 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 117: Error History

    18 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 118: Make-Up Of Error History

    18.2 Make-up 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 code list Error phase: Phase in which error occurred →...

  • Page 119: Safety Notes For Use Of The Azl2

    20 Safety notes for 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 User Manual may only be used as specified and only in connection with the appropriate burner and heat- ing plant.

  • Page 120: Operating The Azl2

    Operating the AZL2… unit 21.1 Description of the unit / display and buttons Function and operation of unit versions AZL21… and AZL23… are identical. /reset h min s Figure 57: Description of the unit / display and buttons Button Function Button F - For adjusting the fuel actuator (keep...

  • Page 121: 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 58: Meaning of display 21.3 Brightness of the display...

  • Page 122: Special Functions

    21.4 Special functions 21.4.1 Manual lockout Press together with any other button. /reset The basic unit switches instantly to the lockout position, no matter what the operating position. /reset plus other button h min s The display shows the fault status message, except when in parameter setting mode.

  • Page 123: 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 124: Backup / Restore

    21.6 Backup / restore Using the AZL2..., the settings made on the basic unit can be stored (backup) and then restored on 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 125: Backup

    21.6.1 Backup Parameter 000: blinks. Display: Parameter 000: blinks, Int does not. /reset Only Press to go to parameter group 041 . /reset level Display: Parameter 041: blinks, ._._ does not. Press to select parameter 050 Display: Parameter 050. blinks, index 00: and value 0 do not.
  • Page 126 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 diagnos- tics, the cause of the error can be determined from the diagnostic code of error message 137 (see Error code list ).

  • Page 127: Restore

    21.6.2 Restore Parameter 000: blinks. Display: Parameter 000: blinks, Int does not. /reset Only Press to go to parameter group 041 . /reset level Display: Parameter 041: blinks, ._._ does not. Press to select parameter 050 Display: Parameter 050. blinks, index 00: and value 0 do not.
  • Page 128 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, the basic unit compares the burner identification and the product no.

  • Page 129: Operation Of Basic Unit Via Azl2

    Operation of basic unit via 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 Unit is in standby mode.

  • Page 130: 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 Ph36 Traveling to the ignition position Ph38...

  • Page 131: 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 operating mode: Current fuel stage h min s Display oP: P1 stands for «Stage 1». Multistage operating mode: Current fuel stage h min s Display oP: P2 stands for «Stage 2».

  • Page 132: 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 unit is in the lockout position. h min s The display shows current error code c: alternating with diagnostic code d: (refer to Blink code list ).

  • Page 133: Error With Safety Shutdown

    22.1.4.4. 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 22.1.4.5.

  • Page 134: 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 135: Info Level

    24 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 136: Display Of 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. h min s /reset 24.2 Display of info values (examples) 24.2.1 Identification date The display shows parameter 102: flashing on the left, characters ._._ on the right.

  • Page 137: Identification Of Burner

    24.2.3 Identification of burner 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 138: 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: ._._ Press for 1…3 s to show the total number of /reset...

  • Page 139: 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 previ- ous parameter. Instead of pressing , you can also press for <1 s.

  • Page 140: 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 . h min s Example: Parameter 161: 0 Back to the previous To the next parameter parameter /reset...

  • Page 141: Parameter Level

    The parameters stored in the basic unit can be displayed or changed on the parameter level. The change to the parameter level requires a password. Siemens supplies the LMV37.4... gas basic units with the factory settings according to «Type summary». The OEM can change the Siemens default settings to match his own requirements.

  • Page 142: Entering The Password

    26.1 Entering the 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 143 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: 143/213 Building Technologies Basic documentation LMV37.4... CC1P7546en HVAC Products 26 Parameter level 01.12.2009...

  • Page 144: Entering The Burner's Identification

    26.2 Entering the burner’s identification The burner’s identification is to be entered like a password (character by character), but from right to left and ending with “ _ “. Parameter 113: flashes. Press to go to editing mode. /reset h m in s /reset You are on the display for undefined burner identification.

  • Page 145: Changing The Heating Engineer's Password

    The display no longer flashes. Example: Burner identification 9993 h min s Press to return to the parameter level. PArA meter 113: for burner identification. h m in s 26.3 Changing the heating engineer’s password Parameter 041: flashes. Press to go to level c: for password changes. h min s /reset Letter n: for n ew.

  • Page 146: Changing The Oem's Password

    26.4 Changing the OEM’s password Parameter 042: flashes. Press to go to level c: for password changes. h min s /reset Letter n: for n ew. Proceed as described in section «Entering the password»and enter the new password (5 characters). After entry of the last character, the password must be /reset h min s...

  • Page 147: Assignment Of The Parameter Levels

    26.6 Assignment of the 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...

  • Page 148: 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 PArA meter 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 149 ↓ ↓ 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: blinks, value 0 The value set will be adopted. does not.

  • Page 150: 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 PArA meter level 100: for general. h min s Press to go to menu /reset level 100: .
  • Page 151 ↓ ↓ 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: blinks, characters ._._ do not.

  • Page 152: Parameter With Index, With Direct Display

    26.9 Parameter with index, with direct display 26.9.1 Using the example of parameter 501: Non-flame positions fuel actuator PArA meter 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 153 ↓ ↓ 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 blink, index The value set will be adopted. 01: blinks, value 0.0 has not changed and does not blink.

  • Page 154: 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 ! HISt orie 700: for error history. h min s Press to go to the pa-...
  • Page 155 /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 156 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 157: Air-Fuel Ratio Curves - Settings And Commissioning

    26.11 Air-fuel 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 un-programmed unit or a unit whose operat- ing mode has been reset or changed displays OFF UPr .
  • Page 158 Note Ensure that the fuel train is correctly set in accordance with the type of burner. Parameter Actuator controlled Burner operating mode (fuel train, modulating / multistage, Fuel actuators, etc.) -- = undefined (delete curves) 1 = gas modulating (G mod) 2 = gas modulating with pilot valve (Gp1 mod) ¹) 3 = gas modulating with pilot valve (Gp2 mod) ¹) 4 = oil modulating (Lo mod)
  • Page 159 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 160: Setting Curvepoints P0 And P9 For Modulating Mode ("G Mod", "Gp1 Mod", "Gp2 Mod" And "Lo Mod")

    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 161 Press simultaneously to adjust speed n0 of the load con- troller. 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 162: Setting Curvepoints P0 And P9 For "G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu

    26.11.3 Setting curvepoints P0 and P9 for «G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu» Note Refer to subsection Setting curvepoints P0 and P9 for modulating mode («G mod», «Gp1 mod», «Gp2 mod» and «Lo mod») ! Here, only the air must be adjusted with 162/213 Building Technologies Basic documentation LMV37.4...

  • Page 163: Warm Settings For Modulating Mode ("G Mod", "Gp1 Mod", "Gp2 Mod" And "Lo Mod")

    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 InFo . 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 Phase Traveling to ignition position min s Wait until the burner is in operation 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 165 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 As soon as symbol ▲...
  • Page 166 Figure 62: 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 167 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 168: Warm Settings For Modulating Mode ("G Mod Pneu", "Gp1 Mod Pneu" And "Gp2 Mod Pneu")

    As soon as symbol ▼ or ▲ is no longer high- lighted, you can press Esc a second time. h min s min s The “warm settings“ for air-fuel ratio control by the LMV37.4... are now completed. 26.11.5 Warm settings for modulating mode («G mod pneu», «Gp1 mod pneu» and «Gp2 mod pneu») Note Refer to subsection Warm settings for modulating mode («G mod», «Gp1 mod», «Gp2 mod»...

  • Page 169: Editing The Curvepoints

    26.11.8 Editing the curvepoints Note To check the change on the burner, a curvepoint change in the cold settings neces- sitates 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 170: Interpolating The Curvepoints

    26.11.9 Interpolating the 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...
  • Page 171 Press to change the value as required. Example: 00.0 s min % Release The required value is adopted. 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 172 >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 173: Setting The Curvepoints For Multistage Mode ("Lo 2-Stage" And "Lo 3-Stage")173

    26.11.10 Setting the 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 174 Note You are now given the choice of proceeding with the “warm settings“ by pressing (refer to subsection Warm settings for modulating mode «G mod», «Gp1 mod», /reset «Gp2 mod» and «Lo mod») , or with the ”cold settings” by pressing (refer to subsection Cold settings for «G mod», «Gp1 mod», «Gp1 mod», «Gp2 mod»...

  • 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 pa- rameters. 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 176 Phase Traveling to ignition position 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 177 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 h min s Press to adjust the value. As soon as symbol ▲...
  • Page 178 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 h min s Press to adjust the value.

  • 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 LMV37.4... have now been configured. 26.11.12 Cold settings for multistage mode («Lo 2-stage» and «Lo 3-stage») Note Refer to subsection Warm settings for «Lo 2-stage» and «Lo 3-stage» ! But with no flame, no traveling of the actuators and no automatic operation after the set- tings has been made.

  • Page 180: Parameter List Lmv37.4

    27 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 tool (set parameter Std_s8 edit 0;...
  • Page 181 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting General Identification date Date read only Info / Service Identification number Std_u16 read only 65535 Info / Service Preselected parameter set: Customer code Std_u8 read only Info / Service LMV37.400...: V 01.04 Preselected parameter set: Version...
  • Page 182 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Delete display of error history Std_s8 edit To delete the display: Set parameter to 1, then to 2 Return value 0: Job successfully completed Return value -1: Timeout of 1_2 sequence Default output for TÜV test Output edit / clear...
  • Page 183 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Performance standard at interruption of communication Output edit / clear 100% 0.1% undefined SO (BA) with building automation Setting values For modulation operation the setting range is as fol- lows: 0…19.9 = burner off 20…100 = 20…100% burner rating...
  • Page 184 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Basic unit Burner operating mode (fuel train, modulating / multi- Selection edit / clear undefined stage, actuators, etc.) -- = undefined (delete curves) 1 = G mod 2 = Gp1 mod 3 = Gp2 mod 4 = Lo mod...
  • Page 185 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Alarm in the event of start prevention Selection edit LMV37.400...: 0 0 = deactivated LMV37.420...: 1 1 = activated Fan ramp up time Time edit 60 s 0.2 s Max.
  • Page 186 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Gas: Safety time 2 (TSA2) Time edit 10 s 0.2 s LMV37.400...: 3 s LMV37.420...: 7 s Gas: Interval 2 Time edit 0.4 s 60 s 0.2 s Gas: Afterburn time Time...
  • Page 187 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Oil: Active detector flame evaluation Selection edit LMV37.400...: 0 0 = QRB / QRC LMV37.420...: 1 1 = ION / QRA Oil: Prepurging Selection edit 0 = inactive 1 = active LMV37.400...: 15 s Oil: Prepurge time...
  • Page 188 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting LMV37.400...: 1 Oil: Time oil ignition Selection edit LMV37.420...: 0 0 = short preignition (Ph38) 1 = long preignition (with fan) (Ph22) Oil: Postpurge time (t3) (abortion with load controller Time edit 108 min...
  • Page 189 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Ratio control No-flame positions fuel actuator Std_s16 edit 0 ° 90 ° 0.1 ° 0 °; 0 °; 15 ° Index 0 = no-load position Index 1 = prepurge position Index 2 = postpurge position No-flame positions air actuator Std_s16...
  • Page 190 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Actuators Selection of reference point Selection edit 1; 0 Index 0 = fuel Index 1 = air 0 = closed (<0°) 1 = open (>90°) Actuator's direction of rotation Selection edit 0;...
  • Page 191 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Error history Error history: 701-725.01.Code Std_u8 read only Info / Service • 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...
  • Page 192 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting Process data Current output Output read only 100% 0.1% Info / Service Index 0 = fuel Index 1 = air Incremental position of actuators Std_s16 read only -50°...
  • Page 193 Par. Parameter Number of Type Edit Value range Resolution Default Password level elements setting 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 Bit 5 = 32: Fuel valve 3 / pilot valve...

  • Page 194: Error Code List

    28 Error code list Error Diagnostic code Meaning for LMV37.4... system Recommended measures code No communication between LMV37.4... basic unit Check wiring for open-circuit / loose contact Comm 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) Air pressure failure...
  • Page 195 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Pressure switch-min (Pmin) No minimum gas /oil pressure Check wiring for open-circuit Gas shortage – start prevention Check wiring for open-circuit Pressure switch-max (Pmax) / POC Pressure switch-max (Pmax): Max. gas / oil pressure Check wiring to see if there is an open-circuit.
  • Page 196 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Internal error air-fuel control: Position calculation multistep Output invalid No valid output Curvepoints undefined Adjust the curvepoints for all actuators Internal error air-fuel ratio control: Data clocking check Current output different Target output different Target positions different Can be caused by different standardized speeds (e.g.
  • Page 197 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Error during VSD’s speed standardization Timeout of standardization (VSD ramp down time too Timeout at the end of standardization during ramp down of the VSD long) 1. Ramp time settings of the VSD are not shorter than those of the basic unit (parameter: 523) Error during storage of the standardized speed Storage of standardized speed not successful →...
  • Page 198 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Safety loop or burner flange is open → repeat standardization with safety loop closed Safety loop / burner flange open Air actuator has not been referenced or has lost its referencing. 1.
  • Page 199 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Speed error VSD Required speed has not been reached Bit 0 Speed has not been reached because control range limitation has become active Lower control range limitation → for measures, refer to error code 80 Valency 1 Bit 1 Speed has not been reached because control range limitation has become active...
  • Page 200 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Curve slope actuators 1. The curve's slope may be a maximum of 10% speed change between 2 curvepoints in modulat- ing operation, with a LMV3... ramp of 20 seconds The curve's slope may be a maximum of 20% speed change between 2 curvepoints in modulating operation, with a LMV3...
  • Page 201 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Error air actuator Target position could not be reached within the required tolerance band. Position error 1. Check to see if actuator is locked or overloaded. Bit 0 Open-circuit detected at the actuator’s terminals. Open-circuit Valency 1 1.
  • Page 202 Error Diagnostic code Meaning for LMV37.4… system Recommended measures code Error relay supervision 2 Safety valve 3 Ignition transformer 4 Fuel valve 1 Relay does not pull in Make a reset; if error occurs repeatedly, replace the unit 5 Fuel valve 2 6 Fuel valve 3 Internal error relay control Make a reset;...
  • Page 203 Error Diagnostic code Meaning for LMV37.4… system Recommended measures code 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 re- Internal error EEPROM access peatedly, replace the unit Make a reset, repeat last parameterization / check.
  • Page 204 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Internal error – backup / restore Restore successful, but backup data set is smaller than in the current system 157 (-99) Restore – ok, but backup < data set of current system 239 (-17) Backup –...
  • Page 205 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code TÜV test 1 (-1) Invalid phase TÜV test may only be started in phase 60 (operation) 2 (-2) TÜV test default output too low TÜV test default output must be lower than the lower output limit TÜV test default output must be higher than the upper output limit 3 (-3) TÜV test default output too high...
  • Page 206 Error Diagnostic code Meaning for LMV37.4... system Recommended measures code Internal error operating mode selection Redefine the operating mode (parameter 201) Redefine the operating mode (parameter 201). Internal error Make a reset; if error occurs repeatedly, replace the unit Phase number Program stop Program stop is active (no error) Internal error...

  • Page 207: Revision History Of Basic Unit Lmv37.4

    29 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 208 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 functionality) •...
  • Page 209 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 210 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 sec- onds) to prevent wrong error diagnostics in connection with QRA2… (C:7 in place of...
  • Page 211 Index Fehler! Keine Indexeinträge gefunden. 211/213 Building Technologies Basic Documentation LMV37.4... CC1P7546en HVAC Products 01.12.2009...

  • Page 212: List Of Figures

    30 List of figures Figure 1: Electrical connection................... 15 Figure 2: Ionization input at AC 120 V / AC 230 V............26 Figure 3: QRB… input at AC 120 V / AC 230 V ............... 28 Figure 4: LMV37.4...: Dimension ..................29 Figure 5: Flame signal input X10-05 .................
  • Page 213 Fig. 60: Info level.......................135 Figure 61: Service level....................139 Figure 62: Setting the curvepoints ...................166 Figure 63: Changing several curvepoints................172 Siemens Building Technologies HVAC Products GmbH © 2008 Siemens Building Technologies HVAC Products GmbH Berliner Ring 23 Subject to change! D-76437 Rastatt Tel. 0049-7222-598-279 Fax 0049-7222-598-269 www.sbt.siemens.com...

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