boiler management units lmu34 - nicon servniconserv.ro/files/023_n7491en.pdf · integrated hmi with...

CC1N7491en 07.04.2015

Building Technologies Division

7491

Boiler Management Units LMU34...

LMU34... are used for premix condensing gas-fired boilers with pneumatic air / gas ratio control and modulating fan. The LMU34... and this Data Sheet are intended for use by OEMs which integrate the BMUs in their products.

Use

The LMU34… provide all functions required for gas-fired heating boilers in intermittent operation, burner capacity up to 70 kW. Gas modulation takes place by fan speed variation. The LMU34... are designed for residential applications only. Functions for central heating (CH), with or without weather compensation Functions for domestic hot water (DHW), with instantaneous heater, etc.

(depending on the type of LMU34...) Function condensate pump (depending on the type of LMU34...) Integrated HMI with simple parameter settings / readout of installation data Interchangeable L / N mains supply (depending on the type of LMU34...) Options (depending on the type of LMU34...)

1. Auxiliary module AGU2.002... for digital room unit QAA73... (LMU34... parameter settings via QAA73...) and additional output for central heating pump 2. PC software tool for trending / parameter settings (for laboratory and production) 3. YPLAN applications (for UK)

Note! For more details, refer to LMU34... specification!

Key features

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Building Technologies Division CC1N7491en 07.04.2015

Warning notes

To avoid injury to persons, damage to property or the environment, the following warning notes must be observed! Do not open, interfere with or modify the unit! Siemens AG does not assume responsibility for damage resulting from unauthorized interference! All activities (mounting, installation and service work, etc.) must be performed by

qualified staff Before making any wiring changes in the connection area, completely 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 disconnected, there is a risk of electric shock hazard

Protection against electric shock hazard on the LMU34... and on all connected electrical components must be ensured through adequate mounting

The following hazards must be considered and eliminated by fitting appropriate covers and by using adequate constructions: - Electrical shock hazard - Injury when handling the unit - Excessive heat spreading to cables, plastic parts or subassemblies

Before performing any wiring changes, completely isolate the unit from mains supply and take measures to ensure that the plant cannot be inadvertently switched on

Use a multipolar switch to isolate the LMU34... from mains supply Each time work has been carried out (mounting, installation and service work, etc.),

check to ensure that wiring is in an orderly state and that parameters have been correctly set and make the safety checks as described in «Commissioning notes».

Touch the LMU34... only on the transformer to prevent damage to electronic components due to static charges

Check the required DHW temperature to prevent scalding. The installer is responsible for fitting appropriate warning signs near the taps

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

On the application, ensure that pollution degree 2 will not be exceeded Ensure that the level of protection against electrical shock hazard will not be

reduced when installing or integrating the gas burner control into the equipment Screws for securing / mounting the PCB must not be touchable or must be

separated from active parts by double or reinforced isolation To ensure safe and reliable operation of the unit, the following points must also be observed: - Avoid condensation and damp environments!

If such conditions have occurred, make certain the LMU34... is completely dry again before switching on power!

- Static charges must be avoided since they can damage the electronic components when touched

Recommendation: Use ESD equipment!

3/29


Engineering notes

The boiler manufacturer is responsible for correct parameterization of the LMU34... The parameter settings must be in compliance with the relevant standards and directives (e.g. boiler standards)!

Application notes

Notes on integrating the LMU34… (heating boiler for gaseous fuels type C, rated capacity 70 kW): The impact of continuous control of the ignition equipment caused by an internal

failure of one of the burner control components in connection with an earth fault of one of the connecting wires of the ignition equipment must be assessed depending on the application

High limit thermostat function Signals from the potential-free contact at terminals X401: X401 pin 3 / X401 pin 4 will be further handled by the LMU34… in a safety-related manner. Functions ”Shutdown”, “Lockout” and “Reset” are implemented in the LMU34… and are in compliance with EN 298 and DIN V ENV 14459 (class C)

Signals from the flue gas limiter (thermo fuse) fed to terminals X401: X401 pin 1 / X401 pin 2 will be further handled in a non-safety-related manner (class A)

Identification code to EN 298 A M C L X N The LMU34... conforms to standard for gas boiler type C so DIN EN 483: 2000 (gas boiler for central heating). The LMU34.3… conforms to CSA / ANSI Z21.20b 2001 < 117 kW.

Note! Prepurge, postpurge and interpurge times including all fan-related parameters (speed, PWM) are non-safety-related. The boiler must meet the requirements of 6.4.5 (according to EN 483:2000) through other means (e.g. by a gas valve which must meet special requirements)

Mounting notes

The electrical wiring inside the boiler must conform to country-specific and local regulations. The rated loads and the rating of the unit fuse must be taken into account

Ensure that the relevant national safety regulations are complied with Make certain that spliced individual wires cannot get into contact with neighboring

terminals Electromagnetic emissions must be checked on an application-specific basis The unit must be mounted within a closed housing When mounted inside the boiler, the maximum permissible ambient temperature

must not be exceeded On the boiler, fit the unit in a housing (degree of protection min. IP40 or IP54 for

outdoor use) Resistor R114 can reach high temperatures in operation. This must be considered

when mounting and servicing the PCB

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Installation notes

The LMU34... cannot be operated on isolated networks (with no reference to ground)

The high limit thermostat (TB) must be short-circuit proof and adequately secured in its position

Do not mix up live and neutral conductors (only LMU34.300...) Install switches, fuses and earthing, in compliance with local regulations Make certain that the maximum permissible current rating of the connection

terminals is not exceeded When wiring the unit, ensure that mains voltage and protective extra low-voltage

are always strictly separated to warrant protection against electrical shock hazard (according to DIN EN 60730-2-5)!

Only use high-quality and heat-resistant earthing cable On the application, it must be ensured that the connections for functional earth

(burner ground) are connected to protective earth with low impedance The process-related inputs (X300, X400, and X401) are segregated from mains

supply by double or reinforced isolation and powered by protective extra low-voltage (PELV) via a safety isolating transformer. For the PWM fan output (X401: Pin 7 / 8) and the Hall sensor input (X401: Pin 5 / 6), double or reinforced isolation against active live parts must be ensured on the application itself

Ensure that the level of protection against electrical shock hazard will not be reduced when installing or integrating the unit into the equipment

When making the boiler isolation test, functional earth (X500 / X900) must be connected. If not, isolation on the LMU34... will not be tested

Use of high-efficiency pumps

When using high-efficiency pumps or pumps with integrated electronics, the resulting switch-on currents can adversely affect the relays’ service life. For this reason, use of these types of pump is permitted only if previously authorized in writing by Siemens AG.

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Electrical connection of ionization probe or ignition electrode

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

The ionization probe does not offer protection against electrical shock hazard Isolation resistance

- The isolation resistance between ionization probe and ground reduce the quantity of the flame signal - Soiled detector holders reduce the isolation resistance, thus supporting creepage currents

Always run high-voltage ignition cables separately while observing the greatest

possible distance to the unit and to other cables. Always use suitable cable for the ignition equipment. If not observed, unsuitable cable can cause electrical shock or lead to plant failure

Electrical ignition sparks produce high-frequency energy that can adversely affect radio and television reception. The high-voltage cable running to the ignition electrode acts as a transmitter antenna. The ignition module connected to the LMU34…must be equipped with suitable filters to prevent high-frequency energy from being passed from the ignition cable to the other connection terminals. Nevertheless, an application-specific test must be made to ensure that there is no electrical interference. High-frequency energy is also of capacitive and inductive nature, and not only wire-bound. This must be taken into consideration when laying the cables. The ignition cable must meet the technical requirements of the ignition module and must be run to the ignition electrode as directly as possible, without any loops. The ignition cable must never be run parallel or very close to other electrical cables. To avoid poor EMC performance, run the functional earth of the ignition module to burner ground as short as possible. This wire should not be routed via the LMU34…

Commissioning notes

There is no absolute protection against incorrect use of the connectors. For this reason, prior to commissioning the plant, the correct assignment of the connection terminals must be checked

In addition, the following safety checks must be made:

Safety check to be carried out Anticipated response

a) Burner start with gas valve fully closed

Safety shutdown at the end of TSA. Lockout after 3 unsuccessful attempts

b) Burner operation with simulated loss of flame; for that purpose, shut the gas valve in operation and maintain that state

Repetition with restart, followed by safety shutdown at the end of TSA. Lockout after 3 unsuccessful attempts

Ionization probe

Ignition equipment

6/29


Standards and certificates

Conformity to EEC directives - Electromagnetic compatibility EMC (immunity) - Low-voltage directive - Directive for gas-fired appliances

2004/108/EC 2006/95/EC 2009/142/EC

ISO 9001:2008 ISO 14001:2004 OHSAS 18001:2007

Service notes

Each time a unit has been replaced, check all safety functions. In the event of blown fuses external to the LMU34…, the unit must be

returned to Siemens AG (apply to safety checks)

Life cycle

LMU34... boiler management unit have 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 in the standard EN 298. A summary of the conditions has been published by the European Control Manufacturers Association (Afecor) (www.afecor.org). The designed lifetime is based on use of the BMUs according to the manufacturer’s Data Sheet. After reaching the designed lifetime in terms of the number of burner startup cycles, or the respective time of usage, the BMU is to be replaced by authorized personnel. * 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 together with domestic waste. Local and currently valid legislation must be observed.

Type summary

Type

Mai

ns v

olta

ge

Pha

se (

L) /

neut

ral c

ondu

ctor

(N

) in

terc

hang

eab

le

Inte

rfac

e to

A

GU

2.00

2...

(O

penT

herm

/

pum

p m

odul

e)

Inte

grat

ed

DH

W r

elay

DH

W r

elay

as

a co

nden

sate

pum

p

CS

A a

ppro

val

Remark

LMU34.210... AC 230 V

LMU34.215... AC 230 V

LMU34.216... AC 230 V

LMU34.220... AC 230 V With software 02.12

LMU34.3... AC 120 V

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Accessories (to be ordered separately)

Room unit (depending on the type of LMU34...) QAA73...- Refer to Basic Documentation P2284

Interface and pump module (depending on the type of LMU34...) AGU2.002A…- For QAA73

Relay PCB AGU2.005A... For control a high-efficiency pump via LMU34... On request See Data Sheet N7217

Communication interface - Interface for parameterization software ACS425 OCI425 - Interface for laboratory tool ACS420 OCI490...

PC software - Software tool for laboratory ACS420 - Software tool for parameterization ACS425

Outside sensor QAC34- Refer to Data Sheet Q1811

Screwed immersion temperature sensor QAK36…- NTC 10 k - Refer to Data Sheet Q1844

Cable temperature sensor QAZ36.522/109- NTC 10 k - Cable length 2 m - Refer to Data Sheet Q1843

Cable temperature sensor QAZ36.526/109- NTC 10 k - Cable length 6 m - Refer to Data Sheet Q1843

Ionization probe supplied by thirds

8/29


Technical data

Mains voltage - LMU34.2… - LMU34.3…

AC 230 V +10 % / -15 % AC 120 V +10 % / -15 %

Mains frequency - LMU34.2… - LMU34.3…

50 Hz ±5 % 60 Hz ±5 %

Power consumption (with no loads) 10 VA Degree of protection IP00

IP40 or IP54 (to be ensured through mounting)

Safety class 0 Mounting position Vertical (refer to illustration)

7491z06/1204

Dimensions (L x W x D) 160 x 127 x 43.05 mm Weight Approx. 300 g Unit fuses to IEC127 (mains supply) - External side LMU34.2... LMU34.3...

T2 H 250 Terminals «L» and «N» (X1) Terminal «L» (X1)

Material PCB FR4, dual copper layers

Transformer 5 VA thermo fuse 131 °C safety transformer to EN 61558-2-6

Storage DIN EN 60721-3-1 Climatic conditions Class 1K3 Mechanical conditions Class 1M2 Temperature range -20...+60 °C Humidity <90 % r.h. Transport DIN EN 60721-3-2 Climatic conditions Class 2K2 Mechanical conditions Class 2M2 Temperature range -20...+70 °C Humidity <90 % r.h. Operation DIN EN 60721-3-3 Climatic conditions Class 3K3 Mechanical conditions Class 3M2 Temperature range 0...+70 °C Humidity <90 % r.h.

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

LMU34… General unit data

Environmental conditions

9/29


Technical data (cont´d)

Connector X1 Type Siemens AG system-internal connection

cable is supplied together with AGU2.002…, 5 poles, coded

Loads Connected to LMU34… (PELV) Siemens AG system-internal connection

Function Interface for LMU34… Connector X2 Type Stocko: MKS1852-6-0-202

2 poles, coded AGU2.002… connections 7 and 8 interchangeable and short-circuit-proof short-circuit might lead to activation of special LMU34… functions Lumberg: 2.5 MSF02(3114) 2 poles

Loads Connected to LMU34… PELV Siemens AG system-internal connection

Function Interface (OpenTherm) for QAA73… for more detailed information, refer to OpenTherm specification and Basic Documentation QAA73… (P2284)

Connector X3 Type Molex: 1008-5031

3 poles, coded Loads AC 230 V

2 A, cos 0.8 Imax fusing max. T3.15H250 to IEC127

Assignment Function AGU2.002… pin 11: relay NC contact pin 10: relay NO contact pin 9: relay COM contact

Function Changeover contact for control of zone pump / of zone valve NO contact closed when there is a heat request from QAA73… NC contact closed when there is no heat request from QAA73…

Caution! The AGU2.002… has switching circuits operating on protective extra low-voltage and switching circuits operating on mains voltage. On the application, ensure that the required isolation will be observed (cabling, etc.).

Ionization current DC switching threshold 0.45 µA (typically) Response time in the event of loss of flame <1 s Safety time «TSA» 5 s (depending on type of device) Repetition Max. 3

AGU2.002… General unit data

Flame supervision with ionization probe

10/29


External system components

External system components are devices such as Ignition equipment Fan Gas valve Flow switch Hall sensor DHW

The external system components used must be approved by Siemens AG!

11/29


Functions

Modulating control in both central heating (CH) and domestic hot water (DHW) mode

PID control of the heating water temperature PID control of the DHW temperature (DHW outlet temperature) (depending on the

type of LMU34...) NTC temperature sensor on central heating flow pipe NTC temperature sensor on instantaneous DHW line or storage tank (depending

on the type of LMU34...) Connection facility for a CH programmer / timer Connection facility for a non-safety-related flow switch (CH) or water pressure

switch Frost protection CH system (boiler only) Frost protection DHW (boiler only) (depending on the type of LMU34...) Flame supervision by ionization Nonvolatile lockout in the event of loss of flame Nonvolatile lockout in case of high limit thermostat (TB) response Flue gas NTC temperature sensor input or flue gas thermostat input with non-

safety-related function Programmable fault response on flue gas failure: Volatile burner stop or nonvolatile

lockout Multitry ignition sequence Outside sensor input Integrated weather compensation of CH Pumps kick function and valves kick function 3 LEDs for status signals 2 x 7 segment red displays of temperature, faults and diagnostic data Auxiliary module AGU2.002… (depending on the type of LMU34...) CH potentiometer and DHW potentiometer with additional service functions Control of fan speed (non-safety-related) Connection to PC tool interface OCI490... / OCI425 with corresponding software

ACS… (laboratory use) OpenTherm (parameter settings for LMU34... via QAA73) (depending on the type

of LMU34...) Control condensate pump (depending on the type of LMU34...) Function modes: The general function modes are: Standby Frost protection Combi comfort Central heating DHW (combi or storage tank) (depending on the type of LMU34...) Chimney sweep function Controller stop function Anomaly Operating modes (OFF, summer, winter, remote and reset): The following operating modes can be selected by means of the external rotary switch (Gottak switch): Summer OFF Winter Reset (monostable position)

General functions

12/29


Function (cont´d)

AC120 / 230V

NTC - 10 k

NTC - 10 k

NTC - 1 k

FE

High limit thermostat (TB) (safety relevant)

Room thermostat (Y-plan compatible)

Heating circuit primary FlowSwitch (hall or contact /water pressure switch / bridge (not safety relevant)

DHW hall sensor / DHW FlowSwitch *)or input condensate switch *)

Flue gas temperature limiterNTC or contact (not safety relevant)

Heating temperature sensor

DHW temperature sensor

Outside sensor

Heating time switch

Reset N (safety relevant)

Ionization probe(safety relevant)

Mains power supply (main switch andfuses outside the PCB)

NTC

Powertransformer

OpenTherm room unit(additional P-settings, etc.)

InterfacePC tool or ACS420 / OCI490PC tool or ACS425 / OCI425

120 / 230 RAC

DC 24 V interface (PELV)

Gas valvel

DC fan(PWM / HALL)

Heating circuit pump(not safety relevant)

3 way valve heating / DHW *)orcondensate pump *)

AC120 / 230V

AC120 / 230V

AC 230 V

AC120 / 230V

AC120 / 230V

AC120 / 230V

AC120 / 230V

HMI

DHW

LED´s

Flame

DHW

*) Depending on the type of LMU34...

Fault display

Note! For more details, refer to LMU34... specification!

13/29


Error code list

QA

A73

...

dis

pla

y o

f e

rro

r co

de

Meaning of QAA73... text display

Inte

rnal

d

iag

no

stic

s c

od

e Cause

Error 10 Error outside sensor 1 Short-circuit of outside temperature sensor

Error 20 Error boiler temperature sensor 1 1 Short-circuit of boiler temperature sensor

Error 20 Error boiler temperature sensor 1 2 Open-circuit of boiler temperature sensor

Error 28 Error flue gas temperature sensor 1 Short-circuit of NTC flue gas sensor

Error 28 Error flue gas temperature sensor 2 Open-circuit of NTC flue gas sensor

Error 50 Error DHW temperature sensor / thermostat 1

1 Short-circuit of DHW sensor

Error 50 Error DHW temperature sensor / thermostat 1

2 Open-circuit of DHW sensor

Error 61 Error room unit 1 20 No telegram received within the timeout time

Error 110 Safety limit thermostat lockout 0 Opening of high limit thermostat

Error 119 Water pressure switch has cutout 0 --

Error 125 Maximum boiler temperature exceeded 20 Pump error due to no temperature gradient

Error 125 Maximum boiler temperature exceeded 21 Pump error due to high temperature check

Error 130 Maximum flue gas temperature exceeded 0 --

Error 131 Burner lockout 0 Pump error due to temperature check or NTC flue gas sensor

Error 133 Safety time for flame establishment exceeded

0 --

Error 151 BMU internal error 32 Not existing zeiko number

Error 151 BMU internal error 33-41 Time overrun in time slot detected

Error 151 BMU internal error 48 Not existing cycle number

Error 151 BMU internal error 65 Program counter was in undefined ROM area

Error 151 BMU internal error 66 Not allowed interrupt vector

Error 151 BMU internal error 67 Stack overflow

Error 151 BMU internal error 68 Error in calculating the heating demand

Error 151 BMU internal error 82 Invalid init state

Error 152 Error parameter setting 20 Invalid parameter version number

Error 152 Error parameter setting 21 Invalid software type

Error 152 Error parameter setting 22 Invalid CRC parameter

Error 155 Remote lockout release blocked -- Not displayed on the LMU34..., but on QAA73...

Error 156 Error supply voltage 20 Low Voltage Fault (burner control start prevention)

Error 156 Error supply voltage 21 Low Voltage Fault (indication, no start prevention)

Error 156 Error supply voltage 22 Over Voltage Fault (indication, no start prevention)

Error 158 Error condensate 0 Condensate pump continuous operation

14/29


Error code list (cont’d)

Q

AA

73...

d

isp

lay

of

err

or

cod

e

Meaning of QAA73... text display

Inte

rnal

d

iag

no

stic

s c

od

e Cause

Error 160 Fan speed threshold not reached 20 Under run of minimum fan speed threshold, wrong air supply, retry

Error 160 Fan speed threshold not reached 21 5 times under run of minimum fan speed threshold, wrong air supply, retry after 2 hour

Error 160 Fan speed threshold not reached 22 Fan speed on standstill in standby not reached

Error 160 Fan speed threshold not reached 23 Fan speed threshold in ignition phase not reached

Error 160 Fan speed threshold not reached 24 Fan speed threshold in ignition phase with delayed restart not reached

Error 160 Fan speed threshold not reached 25 Ignition fan speed threshold not reached

Error 161 Maximum fan speed exceeded 20 Exceeding of maximum fan speed NoGmax

Error 164 Error heating circuit flow / pressure switch 1 Pump OFF, but flow / pressure switch does not open

Error 164 Error heating circuit flow / pressure switch 2 Pump ON, but flow / pressure switch does not close

Error 167 Heating power limit exceeded / under run 20 Exceeding maximum heat capacity in operating mode

Error 167 Heating power limit exceeded / under run 21 Under run minimum heat capacity in operating mode

Error 168 Lockout of device active 0 Burner control communication timeout

Error 180 Chimney sweep function active 0 --

Error 181 Regulator stop function active 0 --

Error 183 Remote reset test mode active 20 Remote reset test mode 1 active

Error 183 Remote reset test mode active 21 Remote reset test mode 2 active

Error 193 Flatness test 1 failed 20 Flatness test 1 failed

15/29


Parameterization

Parameterization by QAA73 (service tool) (depending on the type of LMU34...): Users Installer / service Features Changing various LMU34... parameters Parameter types Non-safety-related Parameter levels Heating engineer Connection of QAA73 To LMU34... via AGU2.002… The LMU34... can be configured for different applications by setting parameters via the QAA73. To make this procedure easy for the installer, 16 sets of parameters have been defined, every set consisting of 9 parameters, and one set for each application. The installer will only select the particular parameter set he needs. He cannot select single parameters. Only the manufacturer of the LMU34... can define these parameter fields. The boiler manufacturer is able to set the parameters via OCI425 / ACS425.

16/29


Parameterization (cont´d)

Parameters and service data that can be edited and viewed in a direct way via the QAA73:

No. OT text Function Access Range Unit

1 TkSmax Max. CH temperature read / write c8_TKSollMin...90 °C

2 THG Summer / winter changeover threshold read / write 10...30 °C

3 Sth1 Slope CH 1 read / write 2...33 ---

4 DtR1 Nominal room adjustment read / write -4.5...4.5 K

5 NhzMax Max. fan speed in CH mode read / write 0...6350 rpm

6 PhzMax Max. modulation in CH mode read / write 0...100 %

7 ZqNach Pump overrun read / write 0...32766 s

8 ZBreMinP Burner min. waiting time read / write 0...6553 s

9 KonfigRg1 Configuration flags read / write 0...255 ---

10 LmodZL_QAA Modulation ignition read / write 0...100 %

11 LmodTL_QAA Min. modulation read / write 0...100 %

12 LmodVL_QAA Max .modulation read / write 0...100 %

13 N_ZL_QAA Nominal fan speed ignition read / write 0...6350 rpm

14 N_TL_QAA Min. nominal fan speed read / write 0...6350 rpm

15 N_VL_QAA Max. nominal fan speed read / write 0...6350 rpm

16 KonfigEingang OT input configuration read / write 0...2 ---

17 Tn_QAA Postpurge time read / write 0...51 s

18 VorgabeLstgLMU Preset output LMU34... read / write 0...100 %

19 ParamID Parameter identification number read --- ---

20 BoilerTyp Boiler type selection read / write 0...15 ---

21 BoilerID Boiler identification read --- ---

22 Stoer1 First previous fault code counter read --- ---

23 Strdia1 First internal previous fault code read --- ---

24 Stoer2 Second previous fault code counter read --- ---

25 Strdia2 Second internal previous fault code read --- ---

26 Stoer3 Third previous fault code counter read --- ---

27 Strdia3 Third internal previous fault code read --- ---

28 Stoer4 Fourth previous fault code counter read --- ---

29 Strdia4 Fourth internal previous fault code read --- ---

30 Stoer5 Fifth previous fault code counter read --- ---

31 Strdia5 Fifth internal previous fault code read --- ---

32 Stoer_akt Actual fault code read --- ---

33 InbetrSetz Startup counter read --- ---

34 SwVers_LMU SW version read --- ---

35 Stralba1 First previous Albatros fault code read --- ---

36 Stralba2 Second previous Albatros fault code read --- ---

37 Stralba3 Third previous Albatros fault code read --- ---

38 Stralba4 Fourth previous Albatros fault code read --- ---

39 Stralba5 Fifth previous Albatros fault code read --- ---

40 Stralba_akt Actual Albatros fault code read --- ---

41 Status_Eingang1 Status input signals LMU34… read --- ---

42 Status_Ausgang1 Status output signals LMU34… read --- ---

Note! Additional parameters via ACS425!

17/29


Display of additional service data

Using the CH potentiometer, several internal parameters can be displayed. For activation of this function, the CH potentiometer must be moved from the starting position to the «Display» area, then out of it and back into it again – all within one second. The function will be active 2 seconds later. The CH potentiometer can be used again to set the CH setpoint. It is not necessary to keep it in the «Display» position. While operating the CH potentiometer, the CH setpoint will be displayed. 5 seconds after the last action, the display will show the selected parameter. While activating this function, the actual DHW setpoint will be stored, so DHW requests will be carried out at this setpoint. 10 different parameters can be selected with the DHW potentiometer. When the «Display» function is active and the DHW potentiometer is being operated, the display shows parameter name A0...A9, depending on the position of the DHW potentiometer. After selecting a parameter, the display shows alternatively the parameter name Ax (1 s) and the parameter value (3 s). 10 different values appear on the display, depending on the DHW potentiometer position. A0 DHW position 0: Actual DHW temperature A1 DHW position 1: Outside temperature A2 DHW position 2: Actual PWM value A3 DHW position 3: Actual fan speed A4 DHW position 4: Actual CH setpoint produced by the LMU34... A5 DHW position 5: Flue gas NTC temperature

(not identical with the effective flue gas temperature) A6 DHW position 6: Diagnostic code A7 DHW position 7: Free A8 DHW position 8: Boiler identification A9 DHW position 9: Boiler parameter identification This function stops when the starting sequence on the CH potentiometer is repeated once again, or when there was no action within 3 minutes (timeout). When the function ended by timeout and the CH potentiometer is in the «Display» position, a «d» will appear alternating with the CH temperature (5 s) to remind the user to set the CH setpoint again to a useful value. In this situation, the CH setpoint or room temperature setpoint (depending on the outside sensor) is set to the minimum. The DHW setpoint will then be taken from the actual DHW potentiometer position. This flashing sequence will stop as soon as the CH potentiometer leaves the «Display» position.

DHW potentiometer CH potentiometer

A0

A1

A2

A3A4 A5

A6

A7

A8

A0

max.

min.B

A

749

1z0

2/0

805

max.

min.

Display

Marking of the DHW and CH potentiometers Range A: Chimney sweep or controller stop function, no preheating function *) Range B: No preheating function *) *) Depending on parameterization

CH potentiometer in the «Display» position:

Marking of the potentiometers:

18/29


Addendum: Applications

CH and instantaneous DHW heating with 3-port valve: CH and DHW storage tank with heating circuit pump and 3-port valve:

Room thermostat

HC1Heat circuit 1

HC1

Q1CH pump

LMU34...

p

Roomthermostat

DHW start

Boiler 1

Heat circuit 1

instantanous

CH

DHW

Q1

DHW

Motor 3 way valve

M

7491a01e/0107

Primaryheat

exchanger

Room thermostat

HC1Heat circuit 1

HC1

LMU34... Roomthermostat

DHW sensor

Boiler 1

Heat circuit 1

CHDHW

Q1CH pump

Q1

DHW storage tank

Motor 3 way valve

M

DHW sensor

7491a02e/0107

Primaryheat

exchanger

Single heating zone, controlled via 2-positiion room thermostat:

Single heating zone, controlled via room thermostat, weather-dependent heating curve:

HC1Heat circuit 1

DHW

p

Boiler 1

instantanous

H

CHDHW

Q1CH pump

Room thermostat

HC1Heat circuit 1

LMU34...

Roomthermostat

DHW startQ1

External summer / / winter changeover

Motor 3 way valve

7491a03e/0107

Primaryheat

exchanger

HC 1Heat circuit 1

Q1CH pump

DHW

p

Boiler 1

instantanous

H

CH

DHW

OTSOutsidetemperaturessensor

Room thermostat

HC1Heat circuit 1

LMU34...

Roomthermostat

DHW startQ1

External summer /winter changeover

Outsidetemperaturesensor

Motor 3 way valve

7491a04e/0107

Primaryheat

exchanger

19/29


Addendum: Applications (cont´d)

Heating zone with weather-compensated heating curve for CH setpoint, with or without room temperature influence:

LMU34...

Remotecontrol

DHW start

Remote control

20 °C

QAA73

OTSOutsidetemperaturesensor


OpenTherm

HC1Heat circuit 1

Boiler 1

Q1CH pump

DHW

p

instantanous

H

CHDHW

CH + DHWPotentiometers without function

Q1

AGU2.002A149

Motor 3 way valve

7491a09e/0107

CH setpointDHW setpointCH timerDHW timer

Primaryheat

exchanger

Multizone system, controlled via room thermostat:

CH1

CH1

CH2

CH2

CHn

CHn

Q1Boiler pump

DHW

p

instantanous

H

CH

DHW

Q2CH pump

Q1CH pump

QnCH pump

Boiler 1

LMU34...Room

thermostatDHW startQ1

External summer / winter changeover

Motor 3 way valve

7491a05e/0107

Primaryheat

exchanger

Room thermostat Room thermostat Room thermostat

20/29


Addendum: Applications (cont´d)

Multizone system, controlled via room thermostat, with outside sensor:

CH1

CH1

CH2

CH2

CHn

CHn

Q1Boiler pump

DHW

p

instantanous

H

CHDHW

Q2CH pump

Q1CH pump

QnCH pump

Boiler 1

OTS

LMU34...

Outside temperaturesensor

RoomthermostatDHW start


Q1

Gottak Summer / Winter

Motor 3 way valve

7491a06e/0107

Primaryheat

exchanger

Room thermostat Room thermostat Room thermostat

Multizone system (room thermostat and / or QAA73), zones with weather-compensated CH setpoint, DHW setpoint and DHW time program controlled by QAA73:

OTS

LMU34...

Outside temperature sensor

Remotecontrol

Roomthermostat

DHW start

Boiler 1


Q1

CH2

CH2

CHn

CHn

Q3CHpump

QnCHpump

CH1

Q2CHpump

AGU2.002A149

Q1Boiler pump

DHWinstantanous

p

H

CH

DHW

Remote controlQAA73

OpenTherm

Motor 3 way valve

7491a10e/0107

Primaryheat

exchanger

20 °CRoom controller CH 1CH timer (MC1)DHW timerDHW setpoint

Room thermostat Room thermostat

External summer / winter changeover for zone 2...n

21/29


Connection diagram

AC 120 VAC 230 V

X1

X2

X3

X9

X500

X501

M Time switch heating circuit

Contact time switch

Betriebserde

Fan supply

Gas valve

Heating circuit pump

3 way valve Heating circuit / DHWor condensate pump

1)

1)

Heating circuit pump

DHW pump

Function earth (has to be connected to burner ground independent from X900)Flame (ionization probe)

OFFON

Summer

Winter

Summer / winter /OFF / reset

Burner switch(not at LMU34...)

L **) / L1 *)

N **) / L2 *) N

PE

Room thermostat

Fuse 1

Connector block(not at LMU34...)

N Reset

L Room thermostat IN

X401Flue gas temperature limit thermostat (NTC or contact) not safety relevant

High limit thermostat (safety relevant)

PWM fan interface supply GND (not safety relevant)

PWM hall sensor (fan speed) IN

PWM control output

PWM fan interface supply + (not safety relevant)

Heating circuit temperature sensor

X400

XX

DHW temperature sensor

Outside sensor

DHW flow switch DHW hall sensor / condensate switch

1)1)

Heating circuit flow switch primary (hall or contact)Water pressure switch / bridge (not safety relevant)

X300

Module remote control (AGU2.002...) 1)

X200

PC tool interface (OCI490)

X403 Interface for parameterization IF (OCI425)

X900 Function earth (has to be connected to burner ground independent from X500)

PELV

Fuse 2

1) Depending on the type of LMU34...

Caution! Connection of X500 with X900 – in each case without separate connection to burner ground and protective – with fault, there is a risk of electric shock hazard! *) Applications L1 / L2 are only permitted in EC countries **) Standard application with L / N for EC and U.S.

22/29


Connectors list

No. Connector type

Pin code print on PCB

Description LMU34.2… LMU34.3…

X1 Molex 2599 2 poles

HT: Mains supply connector AC 230 V,

50 Hz AC 120 V,

60 Hz

1 LMU34.2…: Mains supply L / L1 ---

1 LMU34.3…: Mains supply L ---

2 LMU34.2…: Mains supply N / L2 ---

2 LMU34.3…: Mains supply N ---

X2 Stelvio CFM / 5 A

HT: Cable length 1 m Cable length 1 m

1 Functional earth (not for protection purposes)

2 Ignition ¹) supply N Half wave rectified AC

max. 3 VA Half wave rectified AC

max. 3 VA

3 PWM mains voltage operated fan supply L AC 230 V max. 160 VA

AC 230 V max. 160 VA 4 PWM mains voltage operated fan supply N

5 Ignition ¹) supply L Half wave rectified AC

max. 3 VA Half wave rectified AC

max. 3 VA



1 Gas valve supply L ¹) AC and RAC types cos > 0.5

14 VA

AC types only cos > 0.5

14 VA 2 Gas valve supply N ¹)

3 CH pump supply N or CH + DHW pump N cos >0.9 180 VA

cos > 0.9 95 VA

4 CH pump supply L or CH + DHW pump L

5 3-port valve N or auxiliary relay N 4) 10 VA cos > 0.8

3 poles

4 VA cos > 0.7

3 poles 6 3-port valve CH or auxiliary relay L 4)

7 3-port valve DHW L 4)

8 Reset input N

AC 40 V 50 Hz

< 5 mA cable length 0.5 m

AC 40 V 60 Hz

< 5 mA cable length 0.5 m

9 Room thermostat input L 5 mA (half wave rectified)

Cp < 4000 pF cable length 40 m

5 mA (half wave rectified) Cp < 4000 pF

cable length 40 m

The unit is supplied with the temperature setpoint potentiometer in the OFF position. ¹) Only use components approved by Siemens AG! ²) A special conversion list (hard copy) must be used to retrieve correct measurement values and to set correct threshold values to related functions ³) The fan must meet the requirements of specification LMU5x_TrafoFan_en_V1.2.doc, chapter 3 “Specification for fans with mains voltage operated DC motor” 4) Depending on the type of LMU34...

Note on use of mounted pumps! When using high-efficiency pumps or pumps with integrated electronics, the resulting switch-on currents can adversely affect the relays’ service life. For this reason, use of these types of pump is permitted only if previously authorized in writing by Siemens AG or see AGU2.005.. Data Sheet (N7217).

23/29


Connectors list (cont´d)

No. Connector type

Pin code print on PCB

Description LMU34.2... LMU34.3...



1 CH timer supply N < 5 mA AC cos = 1

< 5 mA AC cos = 1

2 CH timer contact OUT External voltage-free

contact or bridge in series to room thermostat input

External voltage-free contact or bridge in series to room thermostat input

3 CH timer supply L < 5 mA AC cos = 1

< 5 mA AC cos = 1

4 CH timer contact IN External voltage-free

contact or bridge in series to room thermostat input

External voltage-free contact or bridge in series to room thermostat input

X200 PCB edge connector

PELV: PC tool interface (OCI490...) OCI490... / ACS420 OCI490... / ACS420

1 Internal

2 Internal

3 Internal

4 Internal

5 Internal

X300 4)

Lumberg Duomodul 5 poles

PELV: Auxiliary module (AGU2.002…) for remote control

5 poles cable length <10 cm

5 poles cable length <10 cm

1 Internal

2 Internal

3 Internal

4 Internal

5 Internal The unit is supplied with the temperature setpoint potentiometer in the OFF position. ¹) Only use components approved by Siemens AG! ²) A special conversion list (hard copy) must be used to retrieve correct measurement values and to set correct threshold values to related functions ³) The fan must meet the requirements of specification LMU5x_TrafoFan_en_V1.2.doc, chapter 3 “Specification for fans with mains voltage operated DC motor” 4) Depending on the type of LMU34...

24/29



No. Connector

type

Pin code

print on

PCB


X400 Lumberg MSF 9 poles

PELV: Cable length 1 m Cable length 1 m

1 DHW temperature sensor NTC 10 k at 25 °C

beta = 3977 DC 5 V

NTC 10 k at 25 °C beta = 3977

DC 5 V

2 Outside temperature sensor NTC 1 k at 25 °C

beta = 3528 cable length 40 m

NTC 1 k at 25 °C beta = 3528

cable lengths 40 m

3 DHW Hall sensor / DHW flow switch IN

Open-circuit condition: Vout = DC 7.5 V

Closed-circuit condition: Iout < 1 mA Uin < 0.5 V

Open-circuit condition: Vout = DC 7.5 V

Closed-circuit condition: Iout < 1 mA Uin < 0.5 V

4 DHW temperature sensor NTC 10 k at 25 °C beta = 3977 max. DC 5 V

NTC 10 k at 25 °C beta = 3977 max. DC 5 V

5 Outside temperature sensor NTC 1 k at 25 °C beta = 3528

cable length 40 m

NTC 1 k at 25 °C beta = 3528

cable length 40 m

6 DHW Hall sensor / DHW flow switch GND GND GND

7 DHW Hall sensor / CH primary flow switch supply

DC 7.5 V (max. 24 mA)

DC 7.5 V (max. 24 mA)

8 CH primary flow switch / water pressure switch / bridge

DC 7.5 V < 2 mA

DC 7.5 V < 2 mA

9 CH primary flow switch / water pressure switch / bridge

GND GND

The unit is supplied with the temperature setpoint potentiometer in the OFF position. ¹) Only use components approved by Siemens AG! ²) A special conversion list (hard copy) must be used to retrieve correct measurement values and to set correct threshold values to related functions ³) The fan must meet the requirements of specification LMU5x_TrafoFan_en_V1.2.doc, chapter 3 “Specification for fans with mains voltage operated DC motor”

25/29



No. Connector

type

Pin code

print on

PCB


X401 Lumberg

MSF 10 poles PELV: Cable length 1 m Cable length 1 m

1 Flue gas temperature NTC ²) or thermostat

contact

NTC 20 K at 25 °C

beta = 3970

DC 5 V

< 2 mA

NTC 20 k at 25 °C

beta = 3970

DC 5 V

< 2 mA

2 Flue gas temperature NTC ²) or thermostat

contact

NTC 20 K at 25 °C

beta = 3970

DC 5 V

< 2 mA

NTC 20 k at 25 °C

beta = 3970

DC 5 V

< 2 mA

3 High limit thermostat (TB)

Half wave rectified

AC 24 V

I = 2.5...5 mA

Half wave rectified

AC 24 V

I = 2.5...5 mA

4 High limit thermostat (TB)

Half wave rectified

AC 24 V

I = 2.5...5 mA

Half wave rectified

AC 24 V

I = 2.5...5 mA

5 PWM fan interface supply GND ¹) ³) GND GND

6 PWM hall sensor (fan speed) IN (non safety)

¹) ³)

2 rectangular pulses per

revolution

duty ratio 1:1 +/-5 %

2 rectangular pulses per

revolution

duty ratio 1:1 +/-5 %

7 PWM control output (non safety) ¹) ³) 4,800 Hz 4,800 Hz

8 PWM fan interface supply + ¹) ³) DC 30 V DC 30 V

9 CH temperature sensor

NTC 10 k at 25 °C

beta = 3977

DC 5 V

NTC 10 k at 25 °C

beta = 3977

DC 5 V

10 CH temperature sensor

NTC 10 k at 25 °C

beta = 3977

DC 5 V

NTC 10 k at 25 °C

beta = 3977

DC 5 V

X403 Lumberg 3850

4 poles PELV: PARA-IFC (OCI425) OCI425 / ACS425 OCI425 / ACS425

1 Internal

2 Internal

3 Internal

4 Internal

X500 Tabs 6.3 mm HT: Functional earth (burner ground) (not for

protection purposes) Cable length 1 m Cable length 1 m

X501 VT tabs

4.8 mm

HT: Flame (ionization probe) < AC 100 V

cable length 1 m

< AC 100 V

cable length 1 m

X900 Tabs 6.3 mm PELV: Functional earth (burner ground) (not

for protection purposes)

Cable length 1 m Cable length 1 m

The unit is supplied with the temperature setpoint potentiometer in the OFF position. ¹) Only use components approved by Siemens AG! ²) A special conversion list (hard copy) must be used to retrieve correct measurement values and to set correct threshold values to related functions ³) The fan must meet the requirements of specification LMU5x_TrafoFan_en_V1.2.doc, chapter 3 “Specification for fans with mains voltage operated DC motor”

26/29


Dimensions

Dimensions in mm

7

34,5

1,5

5

90 52

75

4011

X900

X300 *) X400 X401

X20

0

35

31 20

65

94

87,55 62,5

160

X501

X500

4,2 (6x)

117

127

5

24,95 21,52

17

,5

32,94 17,53

107

,82

80,1

88

5,2

5


5 40

35 45

5

25 20

51

7491

m01

/040

6

16,6

X1

X2

X3

7

8

11

10

9

Terminal Pin Function

X2 7

OpenTherm 8

X3 9

10 11

LMU34...

AGU2.002… (depending on the type of

LMU34...)

27/29


Dimensions (cont´d)

Dimensions in mm

15

,945

60

6 51

X501

X500

X900

X300 *)X400 X401

X20

0


Mounting position for AGU2.002… on the LMU34...

28/29


Design guide line

Dimensions in mm

9 (6 x)

6 (4 x)

Inclined planefrom 27 up to 54 45

77

62 60Zero point 13

Total height (with AGU2.002... mounted) max. 27

65

33 Total height max. 34

Total height max. 54 (with AGU2.002... mounted)

7491m03e/1006

Area free of components and PCB track

6 51

Zero point

6045

M1:2

With AGU2.002... mountedtotal height of LMU34...circuit printed board max. 15

7491m05e/1006

Component side LMU34…

29/29


Design guide line (cont´d)

Dimensions in mm

9 (6 x)

50

52

3,5 3 (2 x)

Total height max. 539

94

44

14

3,5

4 (4

x)

3,5 4 (2 x)

50

22 (2 x)

44 (2 x)total height max. 11

Total height max. 16

52 total height max. 7

6 (4 x)

3944

28

Zero point

Total height max. 5

55

55

56 34

7491m04e/1006

Area free of components and PCB track

Soldering side LMU34…

2015 Siemens AG Building Technologies Division, Berliner Ring 23, D-76437 Rastatt Subject to change!

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