7 550

Burner Management LMV5...

System
LMV51... Burner control with integrated fuel / air ratio control and load control for use with
forced draft burners.

LMV52... Burner control with integrated fuel / air ratio control and load control for use with
forced draft burners including oxygen trim control.

The LMV5... and this Data Sheet are intended for use by OEMs which integrate
the burner management systems in their products!

Use
LMV5... 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.

- For gas burners with and without fan to EN 298: 2003

- For oil burners to EN 230: 2005

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Warning notes
For additional safety notes, refer to the Basic Documentation of the LMV5... sys-
tem (P7550)!

To avoid injury to persons, damage to property or the environment, the following

warning notes must be observed!

The LMV5... is a safety device! Do not open, interfere with or modify the unit.
Siemens will not assume responsibility for any damage resulting from unauthor-
ized interference!

• All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
• Before making any wiring changes in the connection area of the LMV5..., com-
pletely isolate the plant from mains supply (all-polar disconnection). Ensure that the
plant cannot be inadvertently switched on again and that it is indeed dead. If not
observed, there is a risk of electric shock hazard
• Ensure protection against electric shock hazard by providing adequate protection
for the connection terminals and by securing the housing cover
• Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring and parameterization is in an orderly state and make
the safety checks as described in «Commissioning notes»
• Fall or shock can adversely affect the safety functions. Such units must not be put
into operation, even if they do not exhibit any damage

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Mounting notes
• Ensure that the relevant national safety regulations are complied with

Notes for mounting LMV5...

Mo
Siz unting
e>
2 m plate
m

200
182

232
250

Notes for mounting AZL5...

Mo
Siz unting
e1
96 .5.. plate
.4 m
m
132

39

7550m02e/1208

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Installation notes
• Always run high-voltage ignition cables separately while observing the greatest
possible distance to the unit and to other cables
• Do not mix up live and neutral conductors

Electrical connection of the flame detectors

It is important to achieve practically disturbance- and loss-free signal transmission:
• Never run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
• Observe the maximum permissible detector cable lengths
• The ionization probe is not protected against electric shock hazard. It is mains-
powered and must be protected against accidental contact
• Locate the ignition electrode and the ionization probe such that the ignition spark
cannot arc over to the ionization probe (risk of electrical overloads)

Standards and certificates

Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity) 2004/108/EC
- Directive for gas-fired appliances 2009/142/EC
- Low-voltage directive 2006/95/EC
- Directive for pressure devices 97/23/EEC
- Safety limit thermostats to EN 14597

Safety and control devices for gas and/or oil burners and gas and/or
oil appliances - Particular requirements -
Part 1: Fuel/air ratio controls, electronic type ISO 23552-1:2007

ISO 9001: 2010 ISO 14001: 2010

Cert. 00739 Cert. 38233

Type CSA

LMV51.000C1 z z z --- --- --- z z z

LMV51.000C2 z z z --- --- --- z z z
LMV51.040C1 --- z --- z z z z z z
LMV51.040C2 --- z --- --- --- --- z z z
LMV51.100C1 z z z --- --- --- z z z
LMV51.100C2 z z z --- --- --- z z z
LMV51.140C1 --- z --- z z z z z z
LMV51.140C2 --- z --- --- --- --- z z z
LMV51.300B1 z z z --- --- --- --- --- z
LMV51.300B2 z z z --- --- --- --- --- z
LMV51.340B1 --- z --- z z z --- --- z
LMV52.200B1 z z z --- --- --- --- z z
LMV52.200B2 z z z --- --- --- --- z z
LMV52.240B1 --- z --- z z z --- z z
LMV52.240B2 --- z --- --- --- --- --- z z
LMV52.400B2 z z z --- --- --- --- --- z
LMV52.440B1 --- z --- --- --- --- --- --- z

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Supplementary documentation
User documentation AZL5… Modbus......................................................................A7550
User Documentation, basic diagram for LMV5...
with 2 types of gas ................................................................................................A7550.1
User Documentation, basic diagram for LMV5...
with 2 types of liquefied fuel..................................................................................A7550.3
Operating Instructions ACS450 PC Software for LMV5... ....................................... J7550
Setting Lists .............................................................................................................. I7550
Fundamentals on Installation LMV5….................................................................. J7550.1
Basic Documentation LMV5….................................................................................P7550
Range Overview LMV5… ....................................................................................... Q7550
Operating Instructions AZL5… (U7550.2) for heating engineer level ......... 74 319 0306 0
Operating Instructions AZL5… (U7550.3) for user level............................. 74 319 0307 0

Service notes
• If fuses are blown, the unit must be returned to Siemens

Life cycle
Burner controls has a designed lifetime* of 250,000 burner startup cycles which, under
normal operating conditions in heating mode, correspond to approx. 10 years of usage
(starting from the production date given on the type field). This lifetime is based on the
endurance tests specified in standard EN 230/EN 298 and the table containing the rele-
vant test documentation as published by the European Association of Component
Manufacturers (Afecor) (www.afecor.org).

The designed lifetime is based on use of the burner controls according to the manufac-
turer’s Data Sheet and Basic Documentation.

After reaching the designed lifetime in terms of the number of burner startup cycles, or
the respective time of usage, the burner control is to be replaced by authorized person-
nel.

* The designed lifetime is not the warranty time specified in the Terms of Delivery

Disposal notes
The unit contains electrical and electronic components and must not be disposed of to-
gether with domestic waste.
Local and currently valid legislation must be observed.

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Mechanical design
The following system components are integrated in the basic unit of the LMV5…:
• Burner control with gas valve proving system
• Electronic fuel / air ratio control for use with a maximum of 4 (LMV51…) or 6
(LMV52…) actuators
• Optional PID temperature / pressure controller (load controller)
• Optional variable speed drive module (VSD module)

Example:
Dual-fuel burner
- Gas: Modulating
- Oil: 2-stage

The system components (display and operating unit, actuators and O2 module) are in-
terconnected via a CAN bus system. Communication between the bus users is ensured
via a reliable, system-based data bus. For safety reasons, integration of the bus into
external CAN bus systems is not allowed. All safety-related digital inputs and outputs of
the system are constantly monitored by a contact feedback network (CFN). For flame
supervision in connection with the LMV5... and continuous operation, the QRI... infrared
flame detector, the QRA7... UV flame detector or an ionization probe can be used and,
for intermittent operation, the optical flame detectors type QRB... or QRA2…, QRA4.U,
QRA10… with AGQ1… (AC 230 V).

The burner management system is operated and programmed with the help of the dis-
play and operating unit (AZL5...) or a PC tool. The AZL5... features clear-text display
and menu-driven operation, thus offering straightforward operation and targeted diag-
nostics. To simplify diagnostics, the display shows the operating states, the type of fault
and the point in time the fault occurred. The different parameter setting levels for the
burner / boiler manufacturer and the heating engineer are protected by passwords. Ba-
sic settings that the plant operator can make on site do not demand a password. Fur-
ther, the display and operating unit serves as an interface to higher level systems such
as building automation and control systems (BACS) or a PC which has the ACS450
software installed. Among other features, the unit affords convenient readout of settings
and operating states, parameterization of the LMV5..., and trend logging.

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Mechanical design (cont´d)
When replacing the LMV5... basic unit (BU), all parameters can be saved in a backup
memory of the AZL5… to be downloaded again when the new unit is installed. Hence,
manual reprogramming is not required.

To design specific fuel trains, the burner / boiler manufacturer can choose from a total
of 7 valve families and – by making use of the large number of parameter setting
choices (programming times, configuration of inputs and outputs, etc.) – fuel trains can
be matched to individual needs.

The SQM4.../SQM9... actuators are driven by stepper motors and offer high-resolution
positioning. The characteristics and settings of the actuators are defined by the LMV5...
basic unit.

Type summary

Automatic adaptation

Integrated gas valve

Integrated PID load

Limit thermostat

Fuel meter input

Max. number of

O2 trim control
Control of VSD
Type reference

characteristics

Safety time
Analog output
of controller’s
Mains voltage

Parameter set

TSAmax.
controller
actuators

proving
Gas Oil
LMV51.000C1 AC 120 V Europe 4 --- --- --- z --- --- --- --- 3s 5s
LMV51.000C2 AC 230 V Europe 4 --- --- --- z --- --- --- --- 3s 5s
LMV51.040C1 AC 120 V US / Canada 4 --- --- --- z --- --- --- --- 10 s 15 s
LMV51.040C2 AC 230 V US / Canada 4 --- --- --- z --- --- --- --- 10 s 15 s
LMV51.100C1 AC 120 V Europe 4 z z --- z z --- z --- 3s 5s
LMV51.100C2 AC 230 V Europe 4 z z --- z z --- z --- 3s 5s
LMV51.140C1 AC 120 V US / Canada 4 z z --- z z --- z --- 10 s 15 s
LMV51.140C2 AC 230 V US / Canada 4 z z --- z z --- z --- 10 s 15 s
LMV51.300B1 AC 120 V Europe 5 *) z z z z z z z --- 3s 5s
LMV51.300B2 AC 230 V Europe 5 *) z z z z z z z --- 3s 5s
LMV51.340B1 AC 120 V US / Canada 5 *) z z z z z z z --- 10 s 15 s
LMV52.200B1 AC 120 V Europe 6 z z z z z z z z 3s 5s
LMV52.200B2 AC 230 V Europe 6 z z z z z z z z 3s 5s
LMV52.240B1 AC 120 V US / Canada 6 z z z z z z z z 10 s 15 s
LMV52.240B2 AC 230 V US / Canada 6 z z z z z z z z 10 s 15 s
LMV52.400B2 AC 230 V Europe 6 z z z z z z z z 3s 5s
LMV52.440B1 AC 120 V US / Canada 6 z z z z z z z z 10 s 15 s

*) When the VSD module is activated, only 4 SQM4.../SQM9... actuators can be

controlled!

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Technical data
LMV5... basic unit Mains voltage AC 120 V AC 230 V
-15% / +10% -15% / +10%
Transformer AGG5.210 AGG5.220
- Primary side AC 120 V AC 230 V
- Secondary side 1 AC 12 V AC 12 V
- Secondary side 2 2 x AC 12 V 2 x AC 12 V
Mains frequency 50 / 60 Hz ±6% 50 / 60 Hz ±6%
Power consumption <30 W (typically) <30 W (typically)
Safety class I, with parts according to II and III to
DIN EN 60730-1
Terminal loading «Inputs»
• Perm. mains primary fuse Max. 16 AT Max. 16 AT
(externally)
• Unit fuse F1 (internally) 6.3 AT to 6.3 AT to
DIN EN 60127 2/5 DIN EN 60127 2/5
• Mains supply: Input current depending on operating state of the unit
Undervoltage
• Safety shutdown from operating <AC 96 V <AC 186 V
position at mains voltage
• Restart on rise in mains voltage >AC 100 V >AC 188 V
Oil pump / magnetic clutch
(nominal voltage)
• Nominal current 1,6 A 2A
• Power factor Cosϕ >0.4 Cosϕ >0.4
LP test valve (nominal voltage)
• Nominal current 0.5 A 0.5 A
• Power factor Cosϕ >0.4 Cosϕ >0.4
Status inputs (KRN): Status inputs (with the exception of the safety loop) of the con-
tact feedback network (CFN) are used for system supervision and require mains-
related input voltage
• Input safety loop Refer to «Terminal loading outputs»
• Input currents and input voltages
- UeMax UN +10% UN +10%
- UeMin UN -15% UN -15%
- IeMax 1.5 mA peak 1.5 mA peak
- IeMin 0.7 mA peak 0.7 mA peak
• Contact material recommendation Gold-plated silver contacts
for external signal sources (LP,
DWmin, DWmax, etc.)
• Transition / settling behavior /
bounce
- Perm. bounce time of contacts Max. 50 ms
when switching on / off (after the bounce time, the contact must
stay closed or open)
• UN AC 120 V AC 230 V
• Voltage detection
- On AC 90...132 V AC 180...253 V
- Off <AC 40 V <AC 80 V
Terminal loading «Outputs»
Total contact loading:
(nominal voltage)
• Unit input current (safety loop) total Max. 5 A Max. 5 A
contact current from:
- Fan motor contactor
- Ignition transformer
- Valves
- Oil pump / magnetic clutch

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Technical data (cont’d)

Individual contact loading:

Fan motor contactor
• Nominal voltage AC 120 V AC 230 V
• Nominal current 1A 1A
• Power factor Cosϕ >0.4 Cosϕ >0.4
Alarm output (nominal voltage)
• Nominal current 1A 1A
• Power factor Cosϕ >0.4 Cosϕ >0.4
Ignition transformer (nominal voltage)
• Nominal current 1.6 A 2A
• Power factor Cosϕ >0.2 Cosϕ >0.2
Fuel valves-gas (nominal voltage)
• Nominal current 1.6 A 2A
• Power factor Cosϕ >0.4 Cosϕ >0.4
Fuel valves-oil (nominal voltage)
• Nominal current 1.6 A 1A
• Power factor Cosϕ >0.4 Cosϕ >0.4
Cable lengths
• Mains line Max. 100 m Max. 100 m
(100 pF/m) (100 pF/m)
• HCFN line Max. 100 m Max. 100 m
(100 pF/m) ¹) (100 pF/m) ¹)
• Analog line Max. 100 m Max. 100 m
(100 pF/m) (100 pF/m)
• Flame detector Refer to chapter «Technical Data / Flame
supervision»
• CAN bus Total lengths max. 100 m

& Note!
¹) If the cable length exceeds 50 m, additional loads must not be connected to the
status inputs (refer to «Power supply for the LMV5… system»)!

Above a certain cable length, the actuators must be powered by a separate transformer
installed near the actuators.

Cross-sectional areas The cross-sectional areas of the mains power lines (L, N, PE) and, if required, the
safety loop (safety limit thermostat, water shortage, etc.) must be sized for nominal cur-
rents according to the selected external primary fuse. The cross-sectional areas of the
other cables must be sized in accordance with the internal unit fuse (max. 6.3 AT).

Min. cross-sectional area 0.75 mm²

(single- or multi-core to VDE 0100)

Cable insulation must meet the relevant temperature requirements and conform to the
environmental conditions. The CAN (bus) cables have been specified by Siemens and
can be ordered as accessory items. Other cables must not be used. If this is not
observed, the EMC characteristics of the LMV5... system will be unpredict-
able!

Fuses used in the LMV5... basic unit

- F1 6.3 AT 6.3 AT
DIN EN 60127 2/5 DIN EN 60127 2/5
- F2 4 AT 4 AT
GMD-4A DIN EN 60127 2/5
- F3 4 AT 4 AT
GMD-4A DIN EN 60127 2/5

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Technical data (cont’d)

AZL5... operating Operating voltage AC 24 V -15% / +10%

and display unit Power consumption <5 W (typically)
Degree of protection of housing
- Rear IP00 to IEC 529
- Front IP54 to IEC 529 when installed
Safety class I, with parts according to II and III to
DIN EN 60730-1
Battery:
Supplier Type reference
VARTA CR 2430 (LF-1/2 W)
DURACELL DL 2430
SANYO ELECTRIC, Osaka / Japan CR 2430 (LF-1/2 W)
RENATA AG, Itingen / CH CR 2430

PLL52... Mains voltage «X89-01» AC 120 V AC 230 V

–15% / +10% –15% / +10%
Safety class I, with parts according to II
to DIN EN 60730-1
Mains frequency 50 / 60 Hz ±6% 50 / 60 Hz ±6%
Power consumption Approx. 4 VA Approx. 4 VA
Degree of protection IP54, housing closed

Cable lengths / cross-sectional areas:

• Electrical connection «X89» Screw terminals up to 2.5 mm²
• Cable lengths ≤10 m to QGO20...
• Cross-sectional areas Refer to QGO... description, twisted pairs

Analog inputs:
• Supply air temperature sensor Pt1000 / LG-Ni1000
• Flue gas temperature sensor Pt1000 / LG-Ni1000
• QGO20... Refer to Data Sheet N7842
• Interface Communication bus for LMV52...

AGG5.2… Transformer AGG5.220

- Primary side AC 230 V
- Secondary side AC 12 V (3x)
Transformer AGG5.210
- Primary side AC 120 V
- Secondary side AC 12 V (3x)

CAN bus cable Cable types:

AGG5.641 8 mm dia. ±0.2 mm
Bending radius ≥120 mm
Ambient temperature -30...+70°C
(no movements of cable)
Cable is resistant to almost all types of
mineral oil
AGG5.631 7.5 mm dia. ±0.2 mm
Bending radius ≥113 mm
Ambient temperature -30...+70°C
(no movements of cable)
Cable is resistant to almost all types of
mineral oil

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Technical data (cont’d)

Flame supervision Note:

All measured voltages refer to connection terminal N (X10–02, terminal 4).

QRI (suited for Supply voltage operation / test at termi- Approx. DC 14 / 21 V

continuous operation) nal POWER QRI... (X10–02, terminal 2)
Minimum signal voltage required at ter- Min. DC 3,5 V
minal FSV / QRI... (X10–02, terminal 6) Display flame approx. 50 %

Connection diagram LMV...

sw
X10-02 / 6 Signal

X10-02 / 4 N
br
X10-02 / 2 Power supply
and test

0...10 V
Ri >10 M

For detailed information, refer to Data Sheet N7719.

IONIZATION (suited for No-load voltage at terminal ION (X10– Approx. UMains
continuous operation) 03, terminal 1)

Caution!
The ionization probe must be installed such that protection against electrical
shock hazard is ensured!

Short-circuit current Max. AC 0,5 mA

Required detector current Min. DC 6 µA
Display flame approx. 50 %
Possible detector current Max. DC 85 µA
Display flame approx. 100 %
Permissible length of detector cable 100 m
(lay separately) (wire-earth 100 pF/m)

& Note!
The greater the detector cable capacitance (cable length), the lower the voltage at the
ionizations probe and, therefore, the lower the detector current. In the case of exten-
sive cable lengths and high-resistance flames, it may be necessary to use low-
capacitance cables (e.g. ignition cable). The electronic circuit is designed such that
impacts of the ignition spark on the ionization current will be largely eliminated. Never-
theless, it must be ensured that the minimum detector current required will already be
reached during the ignition phase. If that is not the case, the connections of the ignition
transformer on the primary side must be changed and / or the location of the elec-
trodes also.

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Technical data (cont’d)

Flame supervision

QRA2… / QRA4.U / For intermittent operation only.

QRA10… with
AGQ1…A27

& Note!
AGQ1… is only available for AC 230 V mains voltage.

QRA… Power supply in operation DC 280…325 V

Power supply in test mode DC 390…750 V

For more detailed information about QRA2… / QRA10…, refer to Data Sheet N7712.

For more detailed information about QRA4.U, refer to Data Sheet N7711.

Caution!
QRA2… (QRA4.U / QRA10... must not be used when extraneous light suppres-
sion is activated since detector tests will not be made in that case!

LMV5… Possible ionization current Max. 10 µA

Ionization current required Min. 6 µA

AGQ1…A27 In connection with the LMV5…, ancillary unit AGQ1…A27 must be used.

Power supply AC 230 V

Possible current Max. 500 µA
Current required Min. 200 µA

Connection diagram Assignment of LMV5…terminals:

LMV5...
7550a20/0308

X10-02 / 3 L
X10-02 / 3

X10-02 / 4

X10-03 / 1
X3-01 / 1

X10-02 / 4 N
X10-03 / 1 Ionization
X3-01 / 1 Fan

br bl rt sw
sw bl AGQ1...A27
QRA

When laid together with other cables (e.g. in a cable duct), the length of the 2-core ca-
ble between QRA… and AGQ… must not exceed 20 m. A maximum cable length of
100 m is permitted if the 2-core cable is run at a distance of at least 5 cm from other
live cables. The length of the 4-core cable between AGQ… and LMV5… is limited to
20 m. A maximum cable length of 100 m is permitted if the signal line (ionization /
black) is not run in the same cable but separately at a distance of at least 5 cm from
other live cables.

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Technical data (cont’d)

Flame supervision

QRA7… Power supply for operation

(suited for continuous - QRA73A17 / QRA75A17 AC 120 V
operation) - QRA73A27 / QRA75A27 AC 230 V
Power supply for test via increasing the From DC 14 V up to DC 21 V
power supply for QRI...
(X10-02 terminal 2)
Required signal voltage Min. DC 3.5 V
(X10-02 terminal 6)
Perm. length of detector cable
- 6 wire cable Max. 10
- Signal cable no. 3, 4 and 5 Max. 100 m (lay separately from L, N and
PE in shielded cable)

QRA7...

For more detailed information about QRA7…, refer to Data Sheet N7712.

Connection diagram LMV5... Assignment of LMV5… terminals:

4
QRA7... X10-02.6
X10-02 / 2 QRI... supply
3
X10-02.2 X10-02 / 3 L
X10-02 / 4 N
PE X10-02 / 5 PE
X10-02.5
5 X10-02 / 6 QRI... signal
X10-02.4
2
1
X10-02.3

7550a22/0108

0...10 V
Ri > 10 M Ω

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Technical data (cont’d)

Flame supervision

QRB... (for intermittent No-load voltage at the QRB... terminal Approx. DC 8 V

operation only) (X10–02, terminal 1)
Detector current required (with flame) Min. DC 30 µA
Display flame 35 %
Permissible detector current (dark current Max. DC 5 µA
with no flame)
Permissible detector current Max. DC 70 µA
Display flame approx. 100 %
Permissible length of QRB... detector ca- 100 m (wire-wire 100 pF/m)
ble (lay separately)

& Note!
A detector resistance value of RF <5 kΩ is identified as a short-circuit and, in opera-
tion, will lead to safety shutdown as if loss of flame had occurred. Measurement of the
voltage at terminal QRB... during burner operation gives a clear indication: If voltage
drops below 1 V, safety shutdown will probably occur. For that reason, before using a
highly sensitive photoresistive flame detector (QRB1B, QRB3S), it should be checked
whether such a detector is really required! Increasing line capacitance between the
QRB... terminal and mains live «L» adversely affects the sensitivity and increases the
risk of damaged flame detectors due to mains overvoltages. Separate routing of detec-
tor cables as specified in Data Sheet 7714 must be observed.

Configuration
extraneous light
In the case of incinerator plant or other types of plant operating at combustion chamber
temperatures of >650 °C, an extraneous light test must not be made.

Caution!
Observe the relevant standards and regulations (e.g. extra supervision of the
combustion chamber temperature)!

Indication of flame
AZL5… Caution!
QRB… must not be used when extraneous light suppression is activated since
detector tests will not be made in that case!

For indication of flame (on the AZL5...), observe the following general rules:
The above percentage values are obtained when, for parameter «Standardize» (stan-
dardization of flame signal), the default setting is used. The accuracy of the display is a
maximum of ±10 %, depending on the tolerances of the components. It should also be
noted that, for physical reasons, there is no linear relationship between the display and
the detector signal values. This is especially obvious with ionization current supervision.

For more detailed information, refer to Data Sheet N7714.

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Technical data (cont’d)

Environmental Storage DIN EN 60721-3-1

conditions Climatic conditions Class 1K3
(all LMV5... system Mechanical conditions Class 1M2
components) 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 -20...+60°C
Humidity <95% r.h.
Operation DIN EN 60721-3-3
Climatic conditions Class 3K3
Mechanical conditions Class 3M3
Temperature range -20...+60°C
Humidity <95% r.h.

Caution!
Condensation, formation of ice and ingress of water are not permitted!

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Power supply for the LMV5... system
General The LMV5... system is powered via external transformer AGG5.2.... This transformer
supplies power to certain electronics sections via terminal X10 – 01 and to internal
modules, actuators and display and operating units via terminal X52. Run the power
lines to the bus users together with the communication lines in a common cable. Since
the transformer’s power line is restricted, a second power transformer is required if the
system uses more than 4 SQM45... actuators (or in the case of longer distances). The
second power transformer is operated as shown in example 2. In principle, the bus to-
pology must always have a line structure and, therefore, must have a start and an end
node. The individual bus users must be connected in series, whereby the respective end
nodes are to be terminated by bus terminating resistors. The basic unit is a component
of the communication line and to be looped in between the AZL5... and the actuators.
Within the system, the AZL5... always assumes the function of a bus end node. The re-
quired bus terminating resistor is already integrated in that case. With the actuators, the
last user becomes the bus end node (here, the internal bus termination must be acti-
vated via a connecting plug). The other node users within the line structure are to be
configured without using a terminating resistor.

Example 1 Installation of all components in the burner;

CAN bus cable ↔LMV5... →shielding last actuator ≈ 20 m

Fixed internal SA 1 SA 2 SA 3 SA 4
bus connection
SQM4... SQM4... SQM4... SQM4...

AZL5...
Sub-D
connector
Max. Bus cable length
LMV5...-AZL51...: 80 m
AGG5.631

Max. Bus cable length

LMV5...-SQM4...: 20 m
AGG5.641
RAST3,5
transformer
X52
AC2 12 V
AC2 12 V
AC1 12 V

AC2 12 V
AC1 12 V
CANH

CANH
CANL

CANL

AC1 12 V

F3 T4

F2 T4

12 V
12 V
F1 T6,3
12 V
230 V

LMV5... Basic unit

Power transformer 1
AGG5.2xx X3-04

& Note on example 1!

Total length of CAN bus cable ≤100 m

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Power supply for LMV5... system (cont´d)

Example 2 Basic unit LMV5... in the control panel, actuator on the burner;
CAN bus cable «LMV5... ↔ last actuator» >20 m

Control cabinet SA 1 SA 2 SA 3 SA 4 Burner

SQM4... SQM4... SQM4... SQM4...

AZL5...

AC1 12 V

AC2 12 V
Sub-D Max. cable length
connector 3
from power supply

M
of actuator 3 m

Max. bus cable length Only F T4 F T4

LMV5...-AZL51...: 5 m 3 CANH
AGG5.631 CANL Max. bus cable length
GND SA4 - SA1: 20 m
AGG5.641
Power
transformer 2
Max. bus cable length 230 V 12 V AGG5.2xx
Power line
max. 3 m AC2 12 V RAST3,5 LMV5...- SA1: 75 m Not used
transformer AGG5.641 or F T2
AC2 12 V
AC1 12 V
Shielding

X52 AGG5.631
CANH

CANH
CANL

CANL
GND

GND

AC1 12 V L N
X51

F3 T4 X50

F2 T4

12 V
12 V X10-01

F1 T6.3
12 V 230 V

LMV5... basic unit

Power
transformer 1
AGG5.2xx

Note on example 2!
& Total CAN bus cable length ≤100 m

If the distance between the LMV5... and the last actuator exceeds 20 m, or if more than
4 SQM45… are fitted to the burner (refer to «Determination of the maximum cable
length»), a second transformer is required for powering the actuators. In that case,
transformer 1 powers the LMV5... basic unit and the AZL5... display and operating unit
(control panel). Transformer 2 powers the actuators (burner).

Note!
& With the CAN bus cable connections from the LMV5... (control panel) to the first actua-
tor (burner), the 2 voltages AC1 and AC2 on the LMV5... side must not be connected
and only cables CANH, CANL and GND (+shielding) are to be connected to the first
actuator (burner).
In that case, the actuators must be powered by a second transformer which to be lo-
cated near the actuators.

The power from that transformer (lines AC1, AC2, M) must be fed to the actuator
(ACT4 in the example above) and then connected through via bus cable AGG5.641
(cable type 1) to all the other actuators. The fuses required for transformer 1 are ac-
commodated in the LMV5... basic unit.

Note!
& For transformer 2, the 3 fuses must be located close to the transformer (for type, refer to
Basic Documentation P7550).

For additional examples, refer to Basic Documentation P7550!

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Power supply for the LMV5... system (cont´d)
Determination of the The maximum cable length between power transformer and CAN bus users is depend-
maximum cable length ent on the type of cable (cross-sectional area), the number of actuators and the type of
actuator (supply current). The charts below can be used to determine the maximum
CAN bus cable lengths between the transformer and the group of actuators or display
and operating unit, depending on the influencing factors. The assumption is made here
that the actuators within the group are close to one another. The minimum cross-
sectional area for the system examples shown results from the start of the curve. The
maximum cable length for the specified system cables AGG5.641 and AGG5.631 re-
sult from the points of intersection with the curves in the chart.

50
Diagram for cable
48
length 46
SQM45.../SQM48... 44
Maximum cable length in m

42
40
38
2
36
34
32 AGG5.631 AGG5.641 6
30
28 7
26 3
24
5
22 4
20
18 8
16
14
12
10
8
6

7550d13e/0308
4
2
0
0.5 1.25
Cross-section area in mm2

AGG5.631 (cable type 2)

AGG5.641 (cable type 1)

1 1 x SQM45... 5 2 x SQM48...
2 2 x SQM45... 6 1 x SQM45... + 1 x SQM48...
3 3 x SQM45... 7 2 x SQM45... + 1 x SQM48...
4 4 x SQM45... 8 3 x SQM45... + 1 x SQM48...

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Diagram for cable
length SQM45...,
SQM48... and SQM9...

AGG5.631 (cable type 2)

AGG5.641 (cable type 1)

1 x SQM9...
1 x SQM48... + 1 x SQM9...
3 1 x SQM45... + 1 x SQM9...
CAN bus connection between power transformer and actuator group

& Note!
When using a PLL52..., the maximum permissible cable length is to be reduced by
2 m.

Example:
- System cable: AGG5.641 (connecting cable to the actuators)
- Actuators: 2 x SQM45...

The point of intersection of the vertical line for the AGG5.641 (1.25 mm2) and curve d
(2 x SQM45...) gives a maximum cable length of 33.4 m between the power trans-
former and the group of actuators.

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Building Technologies Division CC1N7550en

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Power supply for the LMV5... system (cont´d)
100
96
92
88

Maximum cable length in m

84
80
76
72
68
64
60
56

1
52
48
44
40
36
32
28 2
24
20
16
12

7550d14E/0308
8 AGG5.631
4
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Cross-section in mm2

AGG5.631 (cable type 2)

1 1 x AZL5...
2 1 x AZL5... + 1 x SQM45...

CAN bus connection between power transformer and AZL5... display and operating unit

Cable types

AGG5.641 (cable type 1) LMV5... ↔ SA AGG5.631 (cable type 2) LMV5... ↔ AZL5...

7550z02e/0903

Silver-grey Silver-grey
7550z01e/0903

RAL 7001 RAL 7001

0.50 mm2 0.50 mm2

1.25 mm2 1.25 mm2 0.50 mm2 0.50 mm2

Shield Shield

Twisted pair 2 x 0.25 mm2 Twisted pair 2 x 0.25 mm2

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Function of communication interfaces of AZL5...
The AZL5... is equipped with 3 different interfaces (connection facilities):
• Interface for LMV5... basic unit: CAN bus including power supply for AZL5...
CAN X70 CAN bus connection for LMV5... basic unit, RJ45 (Sub-D connector X70)
• Interface for PC / laptop: RS-232 (Sub-D connector X71)
COM1 port for PC, for parameterization and visualization by means of
PC tool software, Sub-D, 9 pins
• Interface RS-232 for building automation (RJ45 connector X72)
COM2 port for building automation via external bus interface (RS232)

Note!
& COM1 and COM2 cannot simultaneously be active!

Assignment of terminals CAN X70 COM2 X72

on AZL5…
PIN PIN
2 CAN L COM 2 1 TXD
CAN
3 GND 3 RXD
8 7
4 VAC 2 9 6
8 1
4, 6 GND
5 1
7 CAN H 4 3 2
5 U1
8 VAC 1 7 U2
Pin X70 X72 Socket RJ45

LCD

Operating field

COM 1
COM1 X71

PIN 6
7 8
9 X71
1 5
2 RXD 2 3 4
7550a08e/0906

3 TXD
5 GND

Socket

Pins without designation = not connected

Connection to higher Communication to a building automation and control system is effected via data con-
level systems nection through an external bus interface with galvanic separation connected to the
COM2 port of the AZL5... Depending on the configuration of the AZL5..., this port can
be used to serve either Modbus or eBus.

Modbus When using this bus protocol, the AZL5... operates as a slave. The transmission mode
employed is the RTU Modbus (Remote Terminal Unit). For detailed information, refer to
document «AZL5... Modbus, A7550». Standardized coupling software is available on
request.

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Function of VSD (only LMV51.3... / LMV52.2... with AZL52… and LMV52.4...)
General The VSD module is an extension to the LMV52.2... and is used for the control of a VSD
that ensures safety-related supervision of the fan speed.
2 fuel meters (oil and gas) can be connected as an option.

A VSD can be connected to the VSD module integrated in the LMV52.2… The VSD is
controlled via an analog current output and a potential-free release contact. Evaluation
of the alarm feedback signal from the VSD is accomplished with a 0…24 V input. When
activated, the LMV52.2... will enter the safety phase. Both motor speed and direction of
rotation are acquired by an inductive sensor. In addition, the asymmetric speed signal
is checked for direction of rotation and plausibility.

The VSD module generates the acceleration / deceleration ramps in accordance with
the parameter settings made on the LMV52.2... The motor speed is adjusted the same
way the speed of the actuators is adjusted. For this reason, the characteristic of the
VSD must be linear. Remove filters, delay and damping elements. The VSD module of
the LMV52.2... ensures that the motor’s speed is controlled to the setpoint. The control
range is limited to +15% / -10%. If control range limitation becomes active, the AZL5...
will display it. If this is the case for a longer period of time (→ «Safety time ratio con-
trol»), the LMV52.2... will shut down, delivering the message «Special position not
reached» or «Speed not reached». Speed control is only active with speeds ≥8%.

Basic diagram

The auxiliary actuator can be parameterized on the basic unit, depending on the type of
fuel.

Speed feedback signal The motor’s speed can be acquired with different types of sensors. To detect the mo-
tor‘s direction of rotation with a sensor, a sensor disk with angular steps of 60°, 120°
and 180° is used. The sensor disk generates pulse intervals of 3 different lengths.

& Note!
Speed acquisition is safety-related!

We recommend using the AGG5.310 accessory kit.

To enable the acquired speed to be standardized to the range of 0...100%, the speed
corresponding to 100% must be parameterized (→ «Standardization of speed»).

For more detailed information about the AGG5.310, refer to Basic Documentation P7550
or Mounting Instructions M7550!

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Function of VSD (cont´d)

Fuel meter To acquire the amount of fuel consumed, up to 2 fuel meters can be connected. As-
signment to the type of fuel is fixed. To adapt the system to different types of fuel me-
ters, assignment of the number of pulses and the resulting fuel throughput must be pa-
rameterized.

Fuel meter input Type of sensor: Inductive sensor to DIN 19234 (Namur) or
X71 / X72 open collector (pnp) with UCE-sat <4 V,
UCEmin >DC 15 V or Reed contact
Frequency: ≤ 300 Hz
Pulses / l or gal, m3: ≤ 9999.9999 (to be parameterized)
Pulses / ft3: ≤ 999.99999 (to be parameterized)
Power supply: DC 10 V, max. 15 mA
Switching current: >10 mA

Configuration of The VSD is controlled via a current interface, which can be switched between 0...20 mA
interface and 4...20 mA.

Note If the VSD requires a DC 0...10 V input signal, a resistor of 500 Ω ±1% must be con-
nected to its input in parallel.

Functional tests LMV5... system → VSD

Both functional tests with the LMV5... system were conducted and successfully com-
pleted with the following types of VSDs:
Siemens: - Micromaster 440
Danfoss: - VT2807

EMC In operation, VSDs produce electromagnetic interference.

For this reason – to ensure EMC of the entire system – the instructions given by the
manufacturers must be observed:
Siemens: - Operating Instructions
→ EMC-compatible installation
Danfoss: - Technical Brochure → Radio Interference Suppression Filters
- Data Sheet of Danfoss EMC filter for long motor cables

& Note!
When using other types of VSDs, compliance with EMC regulations and correct func-
tioning will not be ensured!

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Function of LMV52... with O2 trim control
General The LMV52... system is an extended LMV51... system. A special feature of the
LMV52… is control of the residual oxygen content, aimed at increasing boiler efficiency.

In addition to the features of the LMV51..., the LMV52... provides O2 trim control, con-
trol of a maximum of 6 actuators, control of a VSD, and acquisition of cumulated fuel
consumption and current fuel throughput. The LMV52... system uses an O2 sensor
(QGO20...), an external O2 module, and the standard components of the LMV51... sys-
tem.

The PLL... O2 module is a detached measuring module for use with the QGO20... sen-
sor with a connection facility for 2 temperature sensors (Pt1000 / LG-Ni 1000). With the
help of the temperature sensors (flue gas and combustion air temperature), the com-
bustion performance can be determined, depending on the type of fuel. The module
communicates via CAN bus with the LMV52... basic unit. The O2 module is to be lo-
cated near the QGO... (<10 m) to keep the impact on sensitive sensor lines as low as
possible. To power the sensor’s heating element, the O2 module needs its own mains
connection.

QGO20...

Flue gas
temperature detector

Combustion air
temperature detector

O2 module
PLL...

CAN

LMV52...

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Function of LMV52... with O2 trim control (cont’d)

O2 trim control The O2 trim controller or O2 monitor can be deactivated or activated in various operat-
O2 trim controller / ing modes by setting a parameter.
O2 monitor
Warning!
The ratio curves must always be adjusted such that there are sufficient amounts
of excess O2 available, irrespective of environmental conditions!

Parameter O2 Ctrl/Guard (man deact / O2-guard/ O2-control /

conAutoDeac / auto deact)

man deact Both O2 trim controller and O2 monitor are deactivated. The system
operates along the parameterized ratio curves.

O2-guard Only the O2 monitor is active. Prior to startup, the O2 sensor must
have reached its operating temperature. If not, startup will be pre-
vented. If the O2 monitor responds, or if an error occurs in connection
with O2 measurement, the O2 module or O2 sensor, safety shutdown
will take place, followed by a repetition and followed by lockout.

O2-control Both the O2 trim controller and the O2 monitor are active. Prior to
startup, the O2 sensor must have reached its operating temperature.
If not, startup will be prevented. If the O2 monitor responds, or if an
error occurs in connection with O2 measurement, the O2 module or
O2 sensor, safety shutdown will take place, followed by a repetition
and followed by lockout.

conAutoDeac Both the O2 trim controller and the O2 monitor are active (option
«automatic deactivation»). Startup takes place before the O2 sensor
has reached its operating temperature. O2 trim control in operation is
activated only when the operating temperature is reached and the
sensor test has been successfully completed. If the O2 monitor re-
sponds, or if an error occurs in connection with O2 measurement, the
O2 module, the O2 sensor or the sensor test, both the O2 trim con-
troller and the O2 monitor will automatically be deactivated.

The system operates along the parameterized ratio curves and this
parameter will be set to auto deact. The AZL5... indicates automatic
deactivation. The error code is maintained until O2 trim control is
manually deactivated or activated.

auto deact O2 trim control has automatically been deactivated and the system
operates along the parameterized ratio curves (do not select this sys-
tem parameter). To deactivate the O2 trim controller / O2 monitor,
use parameter setting «man deact».

Auxiliary function Warning when flue gas temperature exceeds a certain level.

If a flue gas temperature sensor is connected and activated, a warning signal will be
delivered when a preset flue gas temperature is exceeded. High flue gas temperatures
are an indication of higher boiler losses ⇒ Boiler should be cleaned. The warning
threshold can be set separately for firing on gas and oil.

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Block diagram inputs / outputs

LMV5...
LMV5... X8-01.1 Signal lamp gas

X8-01.2 Signal lamp oil

OIL + GAS

X8-03.2 Auxiliary terminal for valves connected in series

X8-03.3 X8-03.1 Fuel valve V1 (OIL)

X8-02.2 Auxiliary terminal for valves connected in series

X8-02.3 X8-02.1 Fuel valve V1 (OIL)

X7-01.2 X7-01.3 Fuel valve V2 (OIL)

X7-02.2 X7-02.3 Fuel valve V3 (OIL)

X6-03.2 X6-03.3 Fuel valve SV (OIL)

M

X6-02.2 X6-02.3 Oil pump / magnetic clutch

OIL

P
X4-03.2 X4-03.3 Start signal or PS relief (APS test valve)

X4-02.2 X4-02.3 Ignition

X3-01.1 Fan motor contactor

L1-L3 3

FAN

X3-01.2 Alarm

End switch burner flange

X3-03.1
(part of safety loop)

X3-03.2 Power signal for end switch burner flange

X3-04.1 Safety loop

SLT AUX WATER-
SHORTAGE

X3-04.2 Power signal for safety loop

OIL + GAS

PE X3-04.3 Protective earth (PE)

N X3-04.4 Power supply neutral conductor (N)

L1'
F 6.3 AT
L1 X3-04.5 Power supply live conductor (L)
7550a10e/0903

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Block diagram inputs / outputs (cont´d)

P
Power signal for
air pressure switch (LP)
INT

L1'

On/Off

Power signal for START

start release oil
HO-START

P
Power signal for
oil pressure switch-min
P max

START
Power signal for
start release gas

P max

LT
P

T1 FLAME alternative 1
AGG5.2 Black
Neutral conductor 1
PRI
LINE
Power signal
transformer

AC power signal G0
QRB
AC power signal G

Power signal (L)

QRB signal voltage

FLAME alternative 2
Power signal (L)

QRA

FLAME alternative 3

PE

Power signal (L)

7550a10.2e/0511

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Block diagram inputs / outputs (cont´d)

CD O
(0 2-D )

12

Pt 100 Pt/Ni 1000

PRI LINE

SEK II SEK III SEK I

12V 0 0 12V 12V/1,2A

1 23 4 12
D EF L DF O
+ (0 2-I )

T1
AGG5.2

SEK II
+ 12VAC

FE

Brown

CANH

CANL

BUS

12VAC1 12VAC1 12VAC1 12VAC1

Brown

12VAC2 12VAC2 12VAC2 12VAC2

CANH

CANL

FE FE FE FE BUS

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Connection terminals

FE 0V

Shielding:

a) + b) Optional shield connection for rough environmental conditions

b) For shielding the cables on the VSD, refer to the following pieces of documen-
tation:
• User Documentation A7550.2en
Micromaster User Manual 6SE6400-5AW00-0BP0
• Danfoss Operating Instructions VLT 6000 (MG60A703), chapter «Installa-
tion»
b) • Alternative connection of VSD, refer to documentation of used VSD

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Terminal marking of LMV52... with PLL52... O2 module (cont’d)
X86

Pt/LG-Ni 1000

PE

X89-01
F 6.3 AT
X87

Pt/LG-Ni 1000

X89-02
X81

U3

Temporary connection

X85
CANH
for AZL5...

CANL

BUS

FE
12VAC1
12VAC1 12VAC1
X84

braun Brown
12VAC2
12VAC2 12VAC2

CANH

CANL

FE FE BUS

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Fuel train applications (examples)

Direct gas ignition

Program G Direct ignition

SV V1 V2
PS PS PS
min VP max ACT

7550s01E/0202

Gas pilot ignition 1

Program Gp1 Gas pilot

SV V1 V2
PS PS PS ACT
min VP max

PV

7550s02E/0202

Gas pilot ignition 2

Program Gp2 Gas-Pilot

SV V1 V2

PS PS PS ACT
min VP max

PV

7550s17E/0202

Fuel valve control Gas (always modulating)

Legend (fuel trains):

*) Not used
1) Preheating device
V Fuel valve
V2
DK Gas valve proving
DW Pressure switch
Gp2

V1 HE Heating element
HO Heavy oil
LO Light oil
SA Actuator
No Normally Open
SV Shutoff valve (outside the building)
PILOT ignition 1

PV Pilot valve

7550f01a/0511

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Fuel train applications (examples) [cont´d]

Direct ignition with Program LO

V1
light oil, multistage
PS
min

7550s03E/0499
1-stage burner

V2

Program LO V1

PS
min
2-stage burner
7550s04E/0800

V3

V2

Program LO
V1
PS
min 3-stage burner

7550s05E/0800

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Fuel train applications (examples) [cont´d]

Program LO
Direct ignition with V1

light oil, modulating DW

min

Modulating burner
(without shutdown facility for
DW adjustable head)
max M

7550s06e/0308

Program LO V1

DW
min

Modulating burner
(with shutdown facility for
DW
adjustable head)
max
M

7550s07e/0308

Fuel valve control Light oil (direct transformer ignition)

Stage operation
Legend (fuel trains):

V3 LK Air damper
LK V2 MIN LO Light oil
position TSA Safety time
V Fuel valve
LO

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Fuel train applications (examples) [cont´d]

Direct ignition with

heavy oil, multistage Ph
V1

1)
V2
2-stage burner
No

V3

Direct ignition with LMV5...- heavy oil direct start - input Modulating burner
heavy oil, modulating Circulation from phase 38, max. 45 s
V1 V2 as soon as direct heavy oil start =
ON in phase 38
→ Phase change in phase 40
Direct heavy oil start=
1) OFF at the end of phase 38
→ Repetition (max. 3 times in total)

LMV5... - heavy oil direct start - input

Fuel valve control Heavy oil (direct transformer ignition)

Legend (fuel trains)

Stage operation

HO Heavy oil
MAX
LK Air damper
LK TSA Safety time
position MIN V Fuel valve
Z Ignition

Phase 38
max. 45 s

Note on dual-fuel burner!

& Gas trains G, Gp1 and Gp2 1) can be randomly combined with oil trains LO and HO
for operation with dual-fuel burners since these fuel trains operate independently.

Caution!
Oil trains LOgp and HOgp are designed for ignition with a gas pilot. They must
only be combined with a special gas train Gp2 for operation with a dual-fuel
burner.
1) With Gp2 permitted with HW 01.C0, SW V01.40 or higher.

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 Fuel train applications (examples) [cont´d]

Dual-fuel burner gas / Gp2

light oil with gas pilot
ignition SV gas V1 gas V2 gas
PS PS PS ACT
min VP max
Gas

PV gas

V2 oil

V3 oil
LOgp V1 oil

SV oil

7550s15E/0202

Light oil

Fuel valve control Light oil (with gas pilot ignition)

Legend (fuel trains)

Stage operation
TSA1

TSA2

V3
V2 MAX LO Light oil
MIN TSA Safety time
PV Pilot valve
V3 V Fuel valve

V2

V1

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Fuel train applications (examples) [cont´d]

Dual-fuel burner gas / Gp2

heavy oil with gas pilot
ignition SV-gas

SA
Gas

PV-gas

HOgp
V3-oil
SV-oil V1-oil

V2-oil

Fuel valve control Heavy oil (with gas pilot ignition)

Legend (fuel trains):

TSA1

TSA2

Phase 44 MAX HO Heavy oil

max. 45 s V3 PV Pilot valve
MIN
TSA Safety time
V3 V Fuel valve

Circulation from phase 44, max. 45 s

V2
as soon as direct heavy oil start =
ON in phase 44:
V1 → Phase change in phase 40
Direct heavy oil start =
OFF at the end of phase 44
→ Repetition (max. 3 times in total)

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Dimensions
Dimensions in mm

LMV5...

17 30,3 17,4 15,7 44,4

77 54
46,6 76 78,5
68 19
59,5

182
200
162
71,6
8 +0,05

19

232
82,3
250
252
260

26,8 34,9 44,4 34,55 49,25 23,2

17

7550m06/0908

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Dimensions (cont´d)
Dimensions in mm

AZL5...

1) Clamping range min. 1 mm, max. 5 mm

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Dimensions (cont’d)
Dimensions in mm

PLL52...

7550m03/0703

160
142
9
19 36 41,5 41,5 83
33 9 222
66 240

93.6 77.8
AGG5.210… /
66.3
AGG5.220…
22

AGG5.210: 120 V coil

AGG5.220: 230 V coil

12 V coil
77.3
79.3
53
6.3

10 20 7550m04e/0906
12 V coil
15
5.3

45

102.5

120 + 0.5

©2011 Siemens AG Industry Sector Building Technologies Division

Subject to change! 39/39

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