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Siemens LMU54 Series, Basic Documentation

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Siemens Building Technologies

Basic Documentation LMU54... / LMU64...

CC1P7494en

HVAC Products

1 Overview

07.11.2002

1 

Overview

LMU... are Boiler Management Units (BMUs) of digital design for use with gas-fired
appliances equipped with premix burners .

They are used for the startup, control and supervision of premix burners having the
capacity ranges < 70 kW, 70 - 120 kW or > 120 kW in intermittent operation and with
direct ignition of the main flame.

The LMU... provide all supervisory and control functions required for burner, heating and
DHW operation and make possible modular system extensions via integrated
communication interfaces.

Output modulation is accomplished via a PWM-controlled fan, and pneumatic fuel / air
ratio control with the help of a gas valve.

1.1  System concept

7494b01E/0702

RVA47...

RVA46...

LPB

QAA73...

OCI / ACS

OCI420

QAC34...

AGU2.500

LPB

Human Machine Interface

(HMI)

AGU2.303...

AGU2.361...

LMU...

AGU2.350...

AGU2.362...

Room thermostat /
time switch

Modulating room unit

Building automation /
remote management

Service tool

Clip-in

Auxiliary modules

RVA65...

RVA63...

RVA66...

AGU2.310...

AGU2.51x

0...10 V
4...20 mA

Brief description

Summary of Contents for LMU54 Series

Page 1: ...Software version 2 08 CC1P7494en 07 11 2002 Siemens Building Technologies HVAC Products LMU54 LMU64 Boiler Management Unit BMU Basic Documentation ...

Page 2: ...the connection area of the LMU completely isolate the unit from the mains supply Lay high voltage ignition cable completely separate from all other cables Ensure protection against electric shock hazard on the LMU and on all electrical connections through appropriate mounting There is no absolute protection against incorrect use of the RAST5 connectors For this reason check the correct connector a...

Page 3: ...ct liability 14 1 6 Notes on environmental protection 14 Disposal notes 14 2 Product range overview 15 3 Functions 17 3 1 Burner control 17 Program selection 17 EEPROM 17 Forced intermittent operation 17 Burner control program 17 Sequence diagram 18 Capacity range 70 kW 18 Capacity range 70 120 kW 18 Capacity range 120 kW 19 Description of sequence diagrams 19 Sequence times 20 Standby 20 Startup ...

Page 4: ...ed limitation 48 Limitation of ionization current 48 3 5 Boiler control 49 Frost protection for the boiler 49 Controller delay 49 Controller delay due to parameterization 49 Controller delay due to SLT criterion 50 Controller configuration 50 Transfer of setpoint actual value 50 Determining the controller coefficients 50 Heat output limits 51 Boiler temperature control 52 2 position control 52 Min...

Page 5: ... 68 Reduced setback operation 68 Shutdown mode 68 Heating up phase 68 DHW operation 69 3 9 Heating circuit control 70 Attenuated outside temperature 70 Composite outside temperature 71 Type of building construction 71 Heating curves 72 Generating the demands for heat 73 Time switch 74 Room thermostat 75 RU 75 Combinations of RU and room thermostat time switch 76 ECO functions 77 S W changeover 77 ...

Page 6: ...when connecting to the LPB 83 5 1 2 External DHW heating by ALBATROS controllers 83 Type of priority of DHW heating 84 5 1 3 Multiboiler plants with LMU cascade applications 84 Separate DHW circuit in cascade applications 85 Operation with the RVA65 85 5 1 4 System functions 86 Uniform system time 86 Error diagnostic messages from the LMU 86 Outside sensor outside temperature sensor 88 Assignment ...

Page 7: ... 106 Programmable output of the LMU 107 Status output 107 Alarm output 107 Operational status signal 107 Switching off the external transformer 108 Pump output second heating circuit 108 DHW circulating pump 108 Actuating device with warm air curtain function activated 108 Pump of pressureless header 108 Basic function of controller clip in module 108 Actuating device with full DHW charging activa...

Page 8: ...nectors 128 Mains transformer 128 Fan with DC 24 V motor 128 Fan with DC motor operating on mains voltage 128 11 Dimensions 129 11 1 LMU5x 129 11 2 LMU6x 130 11 3 AGU2 500A109 AGU2 51xA109 131 11 4 AGU2 500A209 132 11 5 OCI420A109 133 11 6 OCI420A209 134 11 7 Mounting plate for clip in module 135 12 Parameter list legend of parameter bit fields LMU 136 12 1 Parameter list 136 Parameter list LMU 13...

Page 9: ...ntrol program 145 Operating modes 147 LPB 147 13 Glossary of abbreviations 148 Constants 148 Variables 148 14 Addendum Hydraulic diagrams BMU 149 14 1 Hydraulic diagrams 149 Basic diagrams 149 Pump circuit extensions via AGU2 500 151 Mixing circuit extensions via AGU2 500 153 Zone extensions 156 Heat generation manager 162 14 2 Assignment of hydraulic diagrams to the outputs of the LMU 166 ...

Page 10: ...ovide all supervisory and control functions required for burner heating and DHW operation and make possible modular system extensions via integrated communication interfaces Output modulation is accomplished via a PWM controlled fan and pneumatic fuel air ratio control with the help of a gas valve 1 1 System concept 7494b01E 0702 RVA47 RVA46 LPB QAA73 OCI ACS OCI420 QAC34 AGU2 500 LPB Human Machin...

Page 11: ... 230 V RAC optional Number of start repetitions can be programmed Quick startup especially in connection with instantaneous DHW systems Fan supervision Optimization of combustion optional Control of an AC 230 V fan DC 24 V fan optional Ignition load precontrol via speed readjustment Adaptive postpurge level of fan speed Load limitation fan limitation by minimum maximum speed and or flame signal Nu...

Page 12: ...riants with room thermostat time switch single or dual channel time switch Compensation variants with room controls via integrated interface based on OpenTherm QAA73 QAA53 Integrated interface on OpenTherm basis Communication capability via the Local Process Bus LPB by means of clip in module Consistent system architecture of RVA controllers Optional remote supervision Connection via LPB clip in m...

Page 13: ...rammable digital input for specific functions Housing clip in modules of advanced design made of recyclable plastic 1 3 Product range Refer to chapter 2 Product range overview 1 4 Field of use The LMU are designed for use by OEMs They are supplied directly to the boiler manufacturer and enhance both the functionality and the level of outfit of gas fired boilers Suited for all types of standard hea...

Page 14: ... with the applications and features described above When using the products all requirements specified in chapter Technical data must be observed The local safety regulations must be complied with 1 6 Notes on environmental protection The LMU contains electrical and electronic components and may not be disposed of together with household waste Local and currently valid legislation must be observed...

Page 15: ...tation no LMU54 BMU without housing without combustion optimization CC1P7494 1 LMU64 BMU with housing without combustion optimization CC1P7494 1 REA02 Room thermostat RAA20 CE1N3002 REA11 Room temperature controller CE1P2274 RVA46 Heating controller CE1P2372 RVA47 Cascade controller for modulating gas fired CE1P2379 heating boilers RVA63 Heating circuit controller CE1P2373 2 RVA65 Heat energy mana...

Page 16: ... kΩ 2 QAL36 225 Universal temperature sensor NTC 10 kΩ CE1Q1842 QAZ36 522 109 Cable temperature sensor NTC 10 kΩ cable length 2 m CE1Q1843 QAZ36 526 109 Cable temperature sensor NTC 10 kΩ cable length 6 m CE1Q1843 AQL21 30 Holding spring for QAL36 225 30 mm AQL21 42 Holding spring for QAL36 225 42 mm AGU2 350A109 Dummy cover housing for flush panel mounting 1 degree of protection IPx4D AGU2 361A10...

Page 17: ... of the unit including startup and shutdown as well as flame supervision The sequence can be altered by changing certain parameters If there are deviations from the defined sequence or in the case of a reset the program initiates safety shutdown home run and then depending on the setting made lockout restart or start prevention The program sequence is controlled in accordance with the program s ph...

Page 18: ...splay Phase Home run TLO TNB Standby ti PH_TNB tv TBRE TW1 TW2 tvz tsa1 tsa2 tn tsa TNN tsa1 tsa2 tsa THL2 tn PH_TLO PH_TNN PH_ STANDBY PH_ STARTVER PH_ THL1_1 PH_TV PH_TBRE PH_TW1 PH_TW2 PH_TVZ PH_ TSA2_1 PH_TI PH_ MODU LATION PH_ THL2_1 PH_TN_1 PH_ TSA1_1 PH_ TSA2_2 PH_ TSA1_2 PH_ THL2_2 PH_TN_2 PH_ STOER THL1 PH_ THL1_2 THL1 TW1 PH_TW1 PH_ THL2 Z R PH_ THL2 PH_ THL2 Z R Flame PH_ TSA1_2 PH_ STA...

Page 19: ...fied or following phase Control Permitted range Prohibited range Home run Prohibited range Lockout Ideal signal Transition criterion Control signal Triggering forced prepurging Repetition can be parameterized then lockout Z Operation dependent on parameter setting dependent on parameter setting dependent on parameter setting dependent on parameter setting dependent on parameter setting The burner ...

Page 20: ... Lockout position Waiting for internal sequence speed readjustment and optimization of combustion tvz 0 2 5 0 Switching Preignition time TSA 1 8 9 8 1 Ignition safety time tsa1 0 2 9 6 2 1 Ignition safety time with ignition tsa2 0 2 TSA tsa1 2 1 Ignition safety time without ignition ti 0 2 10 Switching Interval operation tn 0 51 0 Switching Postpurging 1 Lockout position or start repetition depend...

Page 21: ...on with abortion of the safety time in the case of flame detection TSA can be shortened via flame establishment refer to PH_TSA1_2 PH_TSA2_2 Parameterization choice 1 PH_TSA1_1 tsa1 max TSA First part of the safety time with ignition switched on The fuel valve is open PH_TSA2_1 TSA tsa1 max TSA Second part of the safety time with ignition switched off The fuel valve is open Parameterization choice...

Page 22: ...ime at speed NoG_Null Forced prepurging In the case of a reset after lockout and after power ON forced prepurging with the LmodVOr parameter is initiated which takes place in the PH_TV phase and which lasts 21 seconds or tv if tv 21 seconds The deviations marked with Z in the sequence diagram cause the burner control to perform forced prepurging in the next startup phase Repetition at the end of T...

Page 23: ...nding on the parameterization Open LP input depending on the parameterization Temperature limiter has cut out Some of the functions that give rise to start prevention can be deactivated via parameterization Ramps Fan control can be limited by a ramp To do this a number of parameterization choices are available The rate of signal change towards a higher or lower speed is limited via parameter VmLau...

Page 24: ...e with the ramp until it is smaller than or equal to the threshold value Only then will the control value be reduced to zero Fault Display of fault on the PC tool Check PWM control values of the fan for plausibility in relation to other parameters LmodZL LmodVL 218 LmodTL LmodZL 219 LmodNull LmodTL 220 Check speed parameters of the fan for plausibility in relation to other parameters N_TL N_VL 221...

Page 25: ...ameters is only permitted under certain preconditions 1 Capacity range 70 kW 2 Changeover only possible on the OEM level or higher For the new parameters the usual fan parameter checks are made same as with the previous parameter group Listing of both parameter groups Parameters on QAA Safety related parameters LmodZL_QAA LmodZL LmodTL_QAA LmodTL LmodVL_QAA LmodVL N_ZL_QAA N_ZL N_TL_QAA N_TL N_VL_...

Page 26: ... Failure during establishment of flame 2 Response Shutdown on first occurrence restart permitted number of restarts can be parameterized Then lockout also forced prepurging Repetition counter is reset in phase PH_TI Response Shutdown on first occurrence one restart permitted number 0 1 can be parameterized Then lockout also forced prepurging Repetition counter is reset in the PH_TI phase Response ...

Page 27: ...and at mains voltage Then also determine the associated fan speeds from the fan characteristic and parameterize them accordingly N_ZL N_Vor etc In a first approach set the limit values for the permitted bands very wide N_ZL_Delta N_Vor_Delta etc The values of fan control and fan speed can now be optimized Speed limits First the speed readjustment should be set to the required or parameterized spee...

Page 28: ...ing time à more or less overshoot on ignition permitted If the function is activated N_NachstellKon1 N_NachstellKon2 the fan output signal will be readjusted in order to get the speed back into the predefined band e g N_ZL N_Nachstell_Delta If speed readjustment is used the actual speed will be readjusted to nearly the required speed until ignition takes place Since with this readjustment the fan ...

Page 29: ...rom the ignition level the fan speed needs a certain time to settle out just prior to ignition Depending on the application this speed variation can give rise to more or less disturbance Parameter Nachstell_Zaehler can be used to adjust the permitted degree of fan speed settling or from when the change to ignition shall take place If a small value is parameterized e g 1 ignition is effected immedi...

Page 30: ... Present No No Not present TvSollWf1 at TaGem 0 C TvSollWf2 at TaGem 0 C Emergency operation Emergency operation Present No No Present TvSollWf1 TvSollWf2 Weather compen sation LMU Weather compen sation LMU Present Yes No Not present Tset Tset2 TvSollWf2 at TaGem 0 C Room compen sation RU Emergency operation Present Yes No Present Tset Tset2 TvSollWf2 Weather compen sation RU Weather compen sation...

Page 31: ...ed value control Room compen sation RU Present No Yes Present TvSollWf1 Tset Tset2 Weather compen sation LMU Weather compen sation RU RU QAA53 QAA73 RU for Hk1 active RU for Hk2 active Outside sensor Setpoint Hk1 TkSoll Setpoint Hk2 TvSoll Compensation variant heating circuit 1 Compensation variant heating circuit 2 Not present Not present TvSollMmi acc to SU prog HMI Hz1 TvSollMmi Fixed value con...

Page 32: ...n TrSmax 2 Present Yes No No Don t care TrSmin TrSmax 2 TrSmin TrSmax 2 Present Yes No Yes Don t care TrSmin TrSmax 2 TrSmin TrSmax 2 Present Yes Yes No Don t care TrSet TrSmin TrSmax 2 Present Yes Yes Yes Don t care TrSet TrSmin TrSmax 2 RU QAA53 QAA73 Room setpoint RU active RU1 active for heating circuit RU2 active for heating circuit Outside sensor Room setpoint HzA Room setpoint HzB Don t car...

Page 33: ... 2 Don t care No Present TrSollMmi reduced acc to SU program Hz1 TrSollMmi Present Yes No No Not present TrSmin TrSmax 2 TrSmin TrSmax 2 Present Yes No No Present TrSollMmi reduced acc to SU program Hz1 TrSollMmi Present Yes No Yes Not present TrSmin TrSmax 2 TrSmin TrSmax 2 Present Yes No Yes Present TrSollMmi reduced acc to SU program Hz1 TrSmin TrSmax 2 Present Yes Yes No Not present TrSet TrSm...

Page 34: ...the control is deactivated the action is the same as with setting No RU influence using the KonfigHks parameter The following assignments can be made Parameter KonfigHks RU influence on heating circuit 2 of the LMU6x RU influence on heating circuit 1 of the LMU6x Impact 0 0 0 Both heating circuits of the LMU are without RU influence 1 0 1 Hz2 without RU influence Hz1 is controlled by the main heat...

Page 35: ... Present and DHW released 1 Present Not present TbwSollRva RVA DHW RVA compensated Present and DHW released 1 Present Present TbwSollRva RVA DHW RVA compensated LPB clip in DHW sensor 1 TbwIst1 RU QAA73 DHW setpoint TempAnfoVeBw DHW demand Compensation variant DHW circuit Not present or DHW locked Not present Don t care TbwSmin Locked Locked Not present or DHW locked Present Not present TbwSollMmi...

Page 36: ...care TbwSmin DHW heated by RVA LMU internal DHW heating locked Locked Present and DHW released 1 Present Not present TbwSollRva RVA DHW RVA compensated Present and DHW released 1 Present Present TbwSollRva RVA DHW RVA compensated TbwSmin Minimum DHW temperature setpoint TbwSmax Maximum flow temperature setpoint TbwSollMmi DHW temperature setpoint of the HMI TbwSollRva DHW setpoint of the RVA TdhwS...

Page 37: ...g3 0 4 Each sensor can be checked for open circuit or short circuit With all sensors that activate functions automatically open circuit error messages cannot be generated In the event of an open circuit it is therefore possible to select whether the sensor shall generate an error message or whether it shall be used for automatic changeover The selection is made via parameter KonfigRg0 0 4 For assi...

Page 38: ...ensor is used in 2 types of applications Type A Flue gas systems up to 80 C sensor can withstand 150 C Type B Flue gas systems up to 120 C sensor can withstand 150 C Sensors type A and B use the same NTC sensing element as the boiler temperature sensors the only difference being the measuring range The LMU measures the ionization current passing through the probe It can be displayed directly in µA...

Page 39: ...nsor was selected KonfigRg3 and flue gas temperature supervision was released KonfigRg5 the LMU must read in a valid value for the flue gas temperature Otherwise there will be either start prevention with error code or the unit will initiate lockout KonfigRg5 Flue gas temperature supervision is classified as non safety related and overrides boiler control If the first flue gas temperature threshol...

Page 40: ...e The 2 S LT sensors flow and return are safety related sensors They must be located and fixed in a way that constant and even heat transfer is ensured during the entire occupancy time and also after replacement The flow sensor must be fitted at a location that is representative of the maximum boiler temperature The return sensor must be fitted at a location that is representative of the return te...

Page 41: ...renzeGradi ent ϑ dTkTrSTB Reduce output by 20 X Excessive T ϑ dTkTrSTB 8K Reduce output to min X ϑ dTkTrSTB 16K Burner off X X X Parameter GrenzeDelta T Return temperature above flow temperature TkRuec TkIst Sd_RL groesser _VL X X X X Parameter GrenzeRL_gr oesserVL ϑ TkIst TkRuec TkIst Gradient of actual boiler temperature If a fault occurs and the limit thermostat s TW cutout temperature is reach...

Page 42: ...d of time and start prevention was triggered it will be canceled again and delivery of the status code is suppressed If there is no demand for heat there will be no evaluation of the heating circuit flow switch during pump overrun or during a kick function In that case input Heating circuit monitor watches the water pressure water shortage switch A closed pressure switch immediately enables the st...

Page 43: ...e permitted pressure range the boiler will be released with no delay The following graph shows the various phases of water pressure supervision PH2Omax Ph2o 7494d33E PH2Omin PH2OAbschalt Time T0 T1 T2 T3 T4 T5 T7 SdPH2O SdPH2O T6 Response None Shutdown None Boiler output 20 None None Shutdown and pump off Static water pressure supervision with the LMU Boiler shutdown will be triggered when Ph2o PH...

Page 44: ... able to again acquire the pressure change caused by the reactivation of the pump after the boiler has been released again The pressure thresholds can be parameterized in the range from 0 to 5 bar the resolution being 0 02 bar Checking of the pressure thresholds is individually switched off by selecting 0 bar as the minimum value and 5 bar as the maximum value Parameter bit KonfigRg4 3 can be used...

Page 45: ... the following graph depending on the type of plant components connected Heat output control of fan Output signal of temperature controller 7494d01E LmodVL Max heat output without RU Max heat output with RU 100 Modulating range with RU Modulating range without RU Modulating range d h w Max modulating range LmodTL Modulating range of the LMU without speed limitation The output limits in the case of...

Page 46: ...d for DHW heating Minimum output LmodTL LmodTL Maximum output PhzMaxAkt LmodVL The maximum heat output can be adjusted on the HMI QAA73 or PC tool using the controller stop function The setting range is 0 100 whereby the following assignment applies 0 LmodTL 100 LmodVL When setting the maximum heat output the following must be observed Maximum output in DHW mode LmodTL LmodVL 100 Maximum output in...

Page 47: ...ulating range with RU Modulating range without RU Modulating range DHW N_TL Modulating range of the LMU with speed limitation The output limits in the case of heat demand are dependent on the connection of an RU The following table shows the assignment RU Maximum heat output NhzMaxAkt Present See calculations below Not present NhzMax Formula to be used for weather compensation without room influen...

Page 48: ...modulation value at which the flame is not yet lost and combustion performance is still satisfactory LmodVL Maximum permissible PWM value parameter Speed limitation has 2 parameters KpBegr and KpUnbegr which make it possible to set the dynamics of speed limitation The parameter value of 10 represents the default setting An additional limit is introduced for the ionization current parameter IonLimi...

Page 49: ...on for the boiler is the maximum boiler temperature setpoint TkSmax TkSoll TkSmax This gives rise to a higher heat output which means that the switch off criterion will be reached safely within a short period of time Terminating frost protection for the boiler TkIst TkSfrostAus If there is no other or no greater demand for heat shutdown will be initiated when the switch off criterion is reached an...

Page 50: ...mney sweep Controller stop or with the test function the controller delay due to an SLT criterion does not exist But these operating modes can activate the SLT criterion for the next startup Depending on the operating mode the boiler controller must be loaded with the relevant setpoints actual values Heating mode DHW storage tank charging Instantaneous DHW heating Setpoint Tsoll TkSoll TkSoll Temp...

Page 51: ... heat output to the required value Upper limitation NhzMaxAkt in the case of heating demand N_VL in the case of DHW demand Lower limitation N_TL in the case of heating and DHW demand To ensure a maximum modulating range will be reached and voltage variations in the fan s power supply can be offset it is recommended to set the setting parameters of output adjustment as follows LmodTL Minimum PWM va...

Page 52: ...me ZBreMinP and then started Interruption of minimum pause time If during the minimum pause time one of the following functions is called for it will immediately be started In the background the minimum pause time for the heating circuit continues to run DHW demand Frost protection for the boiler Controller stop function Chimney sweep function If the demand is terminated during that period of time...

Page 53: ...parameterized Depending on the operating mode the following assignments apply Heating mode DHW storage tank Instantaneous DHW Min switch off differential parameter SdHzAusMin SdHzAusMin SdBwAus1Min Max switch off differential parameter SdHzAusMax SdHzAusMax SdBwAus1Max Switch off differential SdAus f SdHzAusMin SdHzAusMax TkIst f SdHzAusMin SdHzAusMax TkIst f SdBwAus1Min SdBwAus1Max TbwIst1 Switch...

Page 54: ...defined setpoint will be maintained The result of the temperature controller is matched to the PWM signal of the controlling element The output is adjusted via the fan and via pneumatic or electronic ratio control In all cases the temperature limiter overrides the temperature control loop This means that the temperature limiter switches off the boiler when TkMax is reached triggering safety shutdo...

Page 55: ...ority frost protection for the plant can be executed at the same time as DHW heating Frost protection for the plant can be parameterized KonfigRg1 AnlagenFrost 0 Frost protection for the plant deactivated KonfigRg1 AnlagenFrost 1 Frost protection for the plant activated Frost protection for the plant uses the actual outside temperature The type of response depends on the outside temperature level ...

Page 56: ...stratification storage tank quick charging BwSchL DHW stratification storage tank slow charging BwSchFs DHW stratification storage tank frost protection Hz1 Demand for heat pump circuit boiler circuit HzFs1 Demand for frost protection pumps boiler circuit Hz2 Demand for heat mixing circuit pump circuit 2 HzFs2 Demand for frost protection mixing circuit pump circuit 2 HzZone Demand for heat from th...

Page 57: ...ity or all systems with instantaneous DHW heaters With heating demand Resulting temperature demand max temperature demand HC1 temperature demand HC2 temperature demand ext HC With DHW demand Resulting temperature demand temperature demand Bwk The result obtained from the maximum generation must be restricted to the boiler s permissible temperature range Depending on the parameterization this may h...

Page 58: ...102 TkSmin TkMax TkSmax Tstb TkSmin TkSmax TkSmaxAktuell Min difference to temperature limiter 3K Min difference to STB 3K Limitation of the maximum boiler temperature setpoint by the temperature limiter In this case the maximum boiler temperture setpoint is TkSmaxAktuell The greater demand from the consumer circuits cannot be satisfied If after use of the CM the current switch off differential Sd...

Page 59: ...c S W changeover the LMU cannot release them again If this is not desired automatic S W changeover of the RU must be deactivated by setting a higher changeover temperature b Via the LMU The LMU performs automatic S W changeover of its active heating circuits heating circuits not controlled via the RU If the system uses an outside sensor connected to the LMU or to the RVA and if a valid S W changeo...

Page 60: ...use an outside sensor either all heating circuits will be released The following illustration shows the CM s demand for heat in connection with automatic S W changeover 1 7494b07E 0702 Resulting heat demand S W auto S W switch Auto S W switch winter 1 1 Heat demand HC1 Heat demand HC2 Absolute priority DHW demand 1 1 Heat demand zone Heat demand zone per parameter Resulting heat demand of CM A des...

Page 61: ...p with PWM is only supported in those hydraulic systems that have a PWM pump included refer to chapter 10 If the selected hydraulic system that does not permit the use of a PWM pump the connected and parameterized pump will be controlled in a correspondingly stepwise fashion via the PWM line Control of the PWM pump is based on weather compensated flow temperature control according to the heating c...

Page 62: ...lers with no return temperature sensor to increase the efficiency of condensation and when there are no limitations with regard to the heat exchanger s maximum T There should be no bypass if possible Like the first stage plus limitation of the minimum volumetric flow to ensure the expected T will not exceed the adjusted T dTkTrMax Control of Tmax via the volumetric flow 20 15 10 5 0 5 10 15 20 20 ...

Page 63: ... Outside temperature C Outside temperature C Theoretical return temperature at NqmodNenn Range of reduced volumetric flow NqmodMin T supervision Condensing boilers with return temperature sensor to increase the efficiency of condensation and when there are limitations with regard to the heat exchanger s maximum T No bypass allowed As before the pump is activated and deactivated via the AC 230 V li...

Page 64: ... s specifications Minimum pump head of the PWM pump zero pump head at Q 0 at minimum speed speed 1 according to the supplier s specifications This value can be obtained from the H Q chart or from the pump supplier s specifications Maximum pump head of the PWM pump zero pump head at Q 0 at maximum speed speed QmodDrehzStufen according to the supplier s specifications This value can be obtained from...

Page 65: ...tive also T supervision third stage XXXX X0XX T supervision is inactive XXXX X1XX T supervision is active maximum limitation of the flow temperature remains active also T supervision in reduced operation XX0X XXXX The activated stage of T supervision is inactive in reduced operation In reduced operation the pump will then generally operate at the minimum speed NqmodMin When running at minimum spee...

Page 66: ... minimum characteristic depending on the selected speed characteristic or the NqmodNenn speed This means that if NqmodNenn is changed NqmodMinBw will automatically produce another minimum speed for DHW heating Mandatory settings Parameterization to be made by the installer Maximum boiler temperature setpoint for the heating circuit The maximum boiler temperature setpoint or the nominal design temp...

Page 67: ...OEM Installer 1 180 QmodDrehzStufen Number of speeds of the modulating pump OEM Yes If required 2 146 QmodMin Minimum degree of modulation OEM Yes If required 3 147 QmodMax Maximum degree of modulation OEM Yes If required 4 177 FoerderMin Minimum pump head OEM Yes If required 5 176 FoerderMax Maximum pump head OEM Yes If required 6 435 Klambda1 Filter time constant OEM If required No 7 179 KtAbtas...

Page 68: ...eration the pump runs at reduced speed reduced volumetric flow for the greatest part of the operating time and the flow temperature will be appropriately raised On the software side both T limitation and T supervision can be switched on or off When the modulating pump is running maximum limitation of the flow temperature according to the adjusted value is always active In reduced operation it is a...

Page 69: ...oom influence RU or weather compensation RU Switching program of HC1 is in night setback mode BetrNiveauRh1 0 er 1 BetrNiveauRh1 0 means frost protection BetrNiveauRh1 1 means reduced mode this means that the minimum pump speed is also used in frost protection mode If the criteria for night setback are not met T control will be calculated and the calculated pump speed delivered If the LMU knows ab...

Page 70: ...o heat source and that is solely influenced by the prevailing outside temperature No direct setting is possible Generation of the attenuated outside temperature cannot be influenced in any way The attenuated outside temperature is generated by the controller itself It is calculated at 10 minute intervals based on the actual outside temperature The attenuated outside temperature has a direct impact...

Page 71: ...de temperature TaGem1 Composite outside temperature of light buildings TaGem0 Composite outside temperature of heavy buildings The building s thermal storage capacity is taken into account Allows the rate of control to be adapted to the type of building construction Depending on the thermal storage capacity of a building type of building construction the room temperature changes at different rates...

Page 72: ...ating curve describes radiator systems with a radiator exponent of n 1 3 at a room temperature setpoint of 20 C For other systems with n 1 1 for example or different nominal flow return temperatures the slope can be appropriately adjusted In the case of room temperature setpoint changes the heating curve is shifted on a 45 axis in relation to TvSoll f TaGem graph TrSoll 20 C TrSoll 10 C TrSoll 30 ...

Page 73: ...a temperature which is added to the value of the RU If there are several sources that call for heat the following priorities apply 1 Demand for heat via the RU 2 Room thermostat or time switch with without weather compensation For the different plant components that act on the demand for heat refer to the table in chapter Combinations of RU and room thermostat time switch The ECO functions also ha...

Page 74: ...ge to heating circuit 2 was made Otherwise SU2 acts on the DHW circuit If by contrast SU2 is derived from the RT input RU connected the RU always acts on heating circuit 2 When AGU2 310 is connected following applies Time switch is inactive It will be replaced by the time switch program of the AGU2 310 CC1B7494 In this operating mode the time switch produces a reduction of the room temperature set...

Page 75: ...to the QAA73 input the following assignment applies Time switch connected to Impact on RT input Heating circuit 1 RT1 RT if not controlled by the RU Heating circuit 2 RTR2 RT if not controlled by the RU If a RU is connected that unit decides on locking and releasing the heat demands from the heating circuits controlled by it It is only S W changeover that can override this demand The heating circu...

Page 76: ... present Present Not present Not present RT1 SU1 1 2 RT1 SU1 1 Not present Not present Present Present Not present RU1 Present Not present Present Present Not present RU1 RT1 SU1 1 Not present Not present Present Not present Present RU2 Present Not present Present Not present Present RT1 SU1 1 2 RU2 Not present Not present Present Present Present RU1 RU2 Present Not present Present Present Present...

Page 77: ...n accordance with the adjusted setpoints The basic values used for the process are those of the composite outside temperature and those of the current room temperature setpoint If the composite outside temperature exceeds the current room temperature setpoint the heating will be shut down Switch off point of heating TaGem TRw If the composite outside temperature drops by more than 2 C below the cu...

Page 78: ...ted in different ways depending on the configuration Also the temperature demands are determined They result from the user settings and environmental conditions Fixed value control The temperature demands result from the potentiometer position of the HMI Emergency operation The temperature demands result from the calculation of the heating curve based on an assumed outside temperature of 0 C This ...

Page 79: ...n be connected to the LMU5 LMU6 A maximum of 2 clip in modules OCI420 AGU2 500 AGU2 51x can be connected On the LMU the respective hydraulic diagrams must be activated via parameter HydrSystem Pump circuit extensions Diagrams 32 47 Mixing circuit extensions Diagrams 48 63 Zone extensions Diagrams 64 79 With certain hydraulic diagrams using the AGU2 500 applications an additional actuating device Y...

Page 80: ...or the heating circuit is active the flow temperature setpoint is generated from the switch off threshold for frost protection If the heat demand for heating circuit 2 is not set but a forced signal is present the flow temperature setpoint will be placed in the middle between TvSmin and TvSmax The basic unit generates locking signals when the current heat consumption is limited by the consumers Th...

Page 81: ...d the fully closed position The mixing valve clip in module is suited for mixing valves equipped with a 3 position actuator This necessitates 3 states for the control of the mixing valve Toward fully open Toward fully closed Unchanged The running time of the mixing valve is to be parameterized on the LMU This actuator running time will be used for both the opening and the closing command symmetric...

Page 82: ...al extension which in principle comprises 3 applications 1 Additional heating circuits that are controlled by an RVA46 RVA63 or RVA66 2 Support of external DHW heating provided the types of RVA controllers used offer this facility e g RVA63 or RVA66 3 Use of the LMU in a multiboiler plant cascade that is controlled by a superposed cascade controller 5 1 1 Additional heating circuit extensions via ...

Page 83: ...mperature reaches a crucial level e g temperature limiter cuts out the LMU will generate forced signals that force the consumers to draw more heat In response ALBATROS controllers will activate the heating circuit pumps and open their mixing valves In addition the LMU uses forced signals to trigger pump overrun in external heating circuits The duration of pump overrun is determined by LMU paramete...

Page 84: ...eans that the only pieces of equipment to be connected are the flow and return sensors B2 and B7 and the boiler pump Q1 The cascade controller evaluates the heat demand from the consumers and controls the boilers assigned to it according to a selectable strategy For this application all connected LMUs must be used with hydraulic diagram no 80 In general all boiler specific configurations are to be...

Page 85: ...pe of DHW heating diagrams 81 through 85 are available here The other cascade boilers remain set to 80 In addition sensors pumps and valves and an optional flow switch that are used in conjunction with DHW heating are to be connected to this special LMU Although all relevant sensors and actuating devices are to be connected to a special unit from which they are also operated the DHW setpoint is pr...

Page 86: ...on the LMU the following rules must be observed Ø Use of the system time by the LMU makes sense only if it can be displayed by a RU QAA73 or an operating unit AGU2 310 For that purpose on the QAA73 parameter Uhrzeitmaster on line 96 must be set to 1 BMU The AGU2 310 will adopt the clock time automatically Operation of a QAA53 is not possible with this setting since this unit cannot handle clock ti...

Page 87: ...circuit Ø Bus power supply switched off at several units Ø Replace bus line or search for disruptions and short circuits Ø Activate automatic bus power supply at all units LMU parameter LPBKonfig0 no 17 82 Ø 2 or more bus users have the same segment and device address Ø Check the set segment and device address at all units and if necessary make changes according to Setting the LPB device and segme...

Page 88: ...sor are excluded from this rule They do not give consideration to external outside temperature signals When interconnecting several LPB compatible units address assignment to every component is mandatory The address of a user is like a postal address and may occur in the system only once to ensure troublefree communication A basic distinction is made between device address and segment address The ...

Page 89: ...onnected The outputs of the clip in function module are used by the LMU as programmable outputs For each of the maximum of 3 outputs on the clip in module a function can be selected via a specific parameter The functions are described in chapter Programmable output of the LMU Assignment of the required functions to the individual outputs of the clip in function module is made via parameters Konfig...

Page 90: ...edefined output 6 Sensor input Pressureless header In that case the heat demand temperature demand is predefined via an analog signal This can take place via a current signal 4 20 mA or voltage signal DC 0 10 V The maximum value is defined via parameter TanfoExtMax on the LMU The setting range of this parameter is from 5 to 130 C the resolution being 1 C The heat demand is derived from the the tem...

Page 91: ...he analog signal lies below the parameterized threshold the predefined output will not be active U V 10 8 6 4 2 0 0 Parameter PAnfoExtSchwelle I mA 20 16 12 7494d43E 0702 100 rel Boiler output 8 4 0 Predefined output This function facilitates control of the boiler to the flow temperature after the pressureless header For that purpose a sensor located in the flow after the pressureless header must ...

Page 92: ...as the consumer draws heat the boiler return flow rate is always lower than the flow after the pressureless header The boiler return temperature exceeds the level acquired by the sensor at the pressureless header only when on the consumer side the flow rate approaches zero In that case the sensor after the pressureless header is no longer used for control but the boiler return sensor This state is...

Page 93: ...on the boost can be limited to a minimum In that case the DHW setpoint will be limited DHW setpoint 7494d16e 0102 Boiler setpoint TkSmin TkSmax TbwSmin Max DHW setpoint TuebBw DHW setpoint TuebBw Min boost Boiler temperature setpoint during storage tank charging TbwSmin Minimum DHW temperature setpoint TkSmin Minimum boiler temperature setpoint TkSmax Maximum boiler temperature setpoint Max Bw Sol...

Page 94: ...ll_Frost DHW heating is locked Frost protection for DHW is active AGU2 310 dependent DHW on TbwSollMmiRed TBwSollMmi According to the switching program of the AGU2 310 Follows from RU locked TbwSmin Adoption of frost protection setpoint from the LMU RU dependent Follows from RU released TdhwSet DHW setpoint of RU will be adopted RVA dependent released TbwSollRva DHW setpoint of RVA will be adopted...

Page 95: ...bwIst1 is connected TbwIst1 DHW setpoint SdBwEin1 If the sensor for TbwIst1 and the sensor for TbwIst2 are connected following also applies TbwIst2 DHW setpoint SdBwEin2 and DHW setpoint SdBwEin1 TbwIst1 DHW setpoint SdBwAus1Max SdBwMin The minimum switching differential SdBwMin value 2 K ensures that there is a minimum interval between the switch on and the switch off point of the sensor for TbwI...

Page 96: ...old Stopping the demand for DHW Read in value short circuit threshold Triggering the demand for DHW Connecting to the DHW flow switch input When using this connection no DHW sensor may be connected to the LMU neither Bw1 nor Bw2 sensor Otherwise the demand for DHW will be suppressed The demand for DHW follows from the state of the Bw Flow Switch input 0 Stopping the demand for DHW 1 Triggering the...

Page 97: ...ull charging 0 Full charging of stratification storage tank locked 1 Full charging of stratification storage tank released Depending on the DHW mode on the RU heating program with forward shift of DHW or own DHW program full charging is released in 1 of 2 different ways 1 Full charging during the DHW forward shift against the heating program DHW program t Nom Red frost Charging mode t Full chargin...

Page 98: ...arameterization KonfigRg1 Schaltuhr1 0 No time switch present it is always recharging that is released 1 A time switch for heating circuit 1 is connected to the room thermostat If a time switch is used full charging during the setback phases is released State of room thermostat input 0 Full charging released 1 Recharging released With compensation variant Bw Locked Charging of the stratification s...

Page 99: ...olete the demand for DHW will be stopped based on the criteria of recharging With recharging it is only the upper part of the storage tank that is brought to the setpoint temperature while the pump runs at full speed Function Recharging of the stratification storage tank will be activated when the conditions for full charging are not satisfied or when in full charging mode the sensor for TbwIst2 i...

Page 100: ...tion has a higher priority than heat demand from the heating circuits but the priority of DHW outlet temperature control is even higher In systems with primary heat exchangers there is neither frost protection for DHW nor DHW comfort Instantaneous DHW heating system with plate heat exchanger for sanitary water systems 5 6 and extended systems DHW sensor B3 must be located at the DHW outlet It is p...

Page 101: ...1 After the time Z_BwComfort1 With additional heat demand 1 After the time Z_BwComfort2 After this period of time the LMU switches to the heating circuit and comfort control will be terminated If a demand for heat is received only during comfort mode the remaining time will be shortened to Z_BwComfort2 if remaining time Z_BwComfort1 Z_BwComfort2 1 Additional external heat demand via HC 1 2 RVA etc...

Page 102: ...ON OFF The pump s shutdown time starts when the burner is shut down The pump will be deactivated when this period of time has elapsed It will be activated again when the burner is started up Ab Shutdown time comfort ZqComfortAus NL Overrun time The above graph applies to Z_BwComfort1 and Z_BwComfort2 If ZqComfortAus is parameterized longer than the longest time of Z_BwComfort1 and Z_BwComfort2 the...

Page 103: ...r is constantly maintained at the DHW comfort temperature using comfort sensor B3 When the DHW comfort temperature is not reached Control sensor With comfort sensor B3 Boiler output Minimum fixed value Setpoint Parameter TbwBereit if KonfigRg2 1 1 Differentials SdBwEin2 SdBwAus2Max When the DHW comfort temperature is reached During comfort control Q1 diverting valve are always in operation DHW cir...

Page 104: ...nologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 7 DHW control BWR 07 11 2002 The LMU does not provide legionella protection That function is implemented in connection with the QAA73 for example Legionella function ...

Page 105: ...sers Siemens OEM for use in laboratories Features Changing individual parameters and a parameter set Parameter types Safety related and non safety related parameters Parameter levels All Connection OCI490 to LMU X40 or X50 Note If the PC tool is connected to the LMU only one clip in module may be plugged in Users Siemens OEM installer enduser Features Changing individual BMU parameters Parameter t...

Page 106: ...gang determines the function to be assigned to the programmable input Using parameter KonfigEingang the following functions can be assigned to the programmable input 0 Default programmable input function is not used 1 Modem function active when contact is closed 2 Modem function active when contact is open 3 Warm air curtain function Using the modem function the heating plant can be shut down from...

Page 107: ...tions can be transferred to output K2 of the LMU via parameter KonfigAusgang 0 Default function according to the hydraulic diagram 1 Status output 2 Alarm output 3 Operational signal 4 Switching off external transformer 5 Pump of the second heating circuit 6 DHW circulating pump 7 Actuating device with warm air curtain activated 8 Pump of the pressureless header on off for pump on the consumer sid...

Page 108: ...ump It necessitates aQAA73 of software version 1 4 or higher The criteria for switching on the DHW circulating pump e g time switch program are determined by the QAA73 This function is used to activate the programmable output when the input for the warm air curtain function has been set see programmable input LMU basic or relay clip in function module If this input is not set the output will also ...

Page 109: ...e clip in function module The response threshold with the predefined setpoint is reached when the input signal corresponds to a temperature level above 5 C With the predefined output the response threshold is defined by parameter PAnfoExtSchwelle The LMU has an integrated mains transformer to provide extra low voltage power for the LMU the HMI the RU maximum 2 clip in modules e g AGU2 500 OCI420 A...

Page 110: ...g circuit pressure monitor Progr digital input for air pressure monitor for example Ignition module integrated PWM Hall 6 Stepper motor control combustion optimization M AC 230 V PWM modulated AC 230 V Room unit QAA73 QAA53 Operating section FE Flame supervision continuously Programmable output ϑ Flue gas sensor DHW sensor 2 Fuel valves AC 230 V or RAC 230 V Stepper motor control diverting valve M...

Page 111: ... BW1 Prog digital input e g LP Safety shutdown e g GP Room thermostat time switch Room unit e g QAA73 13 14 1 2 HC pressure monitor Mains connection for clip in supply AGU2 500 X52 01 AC 230 V fan motor primary transformer K1 heating circuit pump K2 system pump or prog output K3 diverting valve or DHW charging pump Ionization probe double electrode operation SLT LT Fuel shutoff valve AC 230 V RAC ...

Page 112: ...polar W1 1 2 3 4 5 W2 X13 7494a11E Direction of rotation Can be reversed by exchanging connections 2 and 5 or 3 and 4 9 3 AGU2 104A109 Connecting cable LMU Ö Clip in module AGU2 5x OCI420 via connectors X40 X50 Wire to be cut off Pin1 Pin1 Peripheral core marking 6 core ribbon cable spacing 2 5 mm AWG 24 grey Connector Lumberg type Duomodul 3515 05 K04 1 35 7494a04E 1002 11 0 2 ...

Page 113: ... K14 02 K32 03 K10 02 0 03 K 02 P 02 K15 X51 01 Flow sensor Standard short form designation Lumberg designation 3611 Siemens designation 7494a05E 0102 Standard short form designation Lumberg designation 3611 Siemens designation Lumberg designation Siemens designation X50 3515 05 K04 3515 05 K18 1 2 Lumberg designation This connector variant is permitted only when module is plugged into the LMU6 1 ...

Page 114: ... X52 03 02 K14 02 K32 03 K10 02 0 03 K 02 P 02 K15 X51 01 1 2 5 4 3 2 1 X50 Connection to LMU plug in space X50 Mains connection via LMU X1 02 Mixing circuit pump Mixing valve Standard short form designation Lumberg designation 3611 Siemens designation Standard short form designation Lumberg designation 3611 Siemens designation Flow sensor Lumberg designation Siemens designation X50 3515 05 K18 ...

Page 115: ...02 DB MB MB Ground bus LPB DB Data bus LPB Connection to LMU plug in space X40 Standard short form designation Lumberg designation 3611 Siemens designation Lumberg designation Siemens designation X40 3515 05 K04 3515 05 K18 1 2 Lumberg designation This connector variant is permitted only when module is plugged into the LMU6 1 2 This connector variant is permitted only when printed circuit board is...

Page 116: ...11 2002 9 7 OCI420A209 7494a10E 0702 1 2 3 4 5 X40 Status indication X42 02 K 02 K10 X41 01 DB MB 1 2 MB Ground bus LPB DB Data bus LPB Connection to LMU plug in space X40 Standard short form designation Lumberg designation 3611 Siemens designation Lumberg designation Siemens designation X40 3515 05 K18 LPB Service tool ...

Page 117: ... form designation Lumberg designation 3611 Siemens designation 7494a12E 0702 Standard short form designation Lumberg designation 3611 Siemens designation Lumberg designation Siemens designation X50 3515 05 K04 3515 05 K18 1 2 Lumberg designation Output1R L N N L L 1 Observe polarity of input with AGU2 511A109 AGU2 513A109 1 Output2R Output3R This connector variant is permitted only when module is ...

Page 118: ... CC1P7494en HVAC Products 9 Connection diagrams 07 11 2002 9 9 Connecting cable between OCI490 and PC The connecting cable to be used is a 9 polar serial interface cable with a 1 to 1 connection crossed connections not permitted The cable is not supplied by Siemens Note ...

Page 119: ...adversely affect radio and television reception In that case the high voltage cable running to the ignition electrode acts as a transmitter The ignition module integrated in the LMU is equipped with appropriate filters which prevent high frequency energy from being passed from the ignition cable to the other terminals An application specific test is still required however to prove that spacing is ...

Page 120: ...hock hazard Since the cable to the flame detector electrode must be well insulated against ground it must be protected against condensation together with the detector electrode Input X1 for the unit s power supply must be connected to the power supply network as follows X1 1 to L and X1 2 to N Connection of functional earth to X1 3 must be made in compliance with regulations If the boiler or burne...

Page 121: ... operation to DIN EN 721 3 3 Temperature range 0 60 C Vibrations in operation to EN 298 Environmental conditions during transport to DIN EN 60 068 2 30 and DIN EN 60 730 2 5 chapter 12 Temperature range 20 70 C Vibrations DIN EN 60 721 3 2 requirements of class 2M2 Condensation formation of ice and ingress of water are not permitted Conformity with EC Directives Electromagnetic compatibility Immun...

Page 122: ...A max 2 2µA Response time in the event of loss of flame 1 s Electric shock hazard cannot be touched Flame detector cable length 1 m Conductors L and N must be correctly connected Safety temperature limiter X3 01 Voltage AC 230 V 10 15 Current 5 mA 1 A cos ϕ 0 8 power supply for fuel valve and ignition Fuel valve X3 02 AC output AC 230 V 10 15 valve must still open at AC 175 V Current 5 mA 0 5 A co...

Page 123: ...cable length 3 m With regard to switch on and switch off characteristics every type of external ignition module used must be approved by Siemens Integrated ignition module X3 04 Min sparking power pulse 3 mJ at 2 kΩ Max sparking power pulse 4 mJ at 2 kΩ in the range of 175 V 253 V Min pulse sequence 10 Hz at 175 V Max pulse sequence 25 Hz at 253 V Electric shock hazard cannot be touched Open circu...

Page 124: ...teristic Temperature C RNTC kΩ Temperature C RNTC kΩ 20 00 96 360 50 00 3 605 10 00 55 047 60 00 2 490 0 00 32 555 70 00 1 753 10 00 19 873 80 00 1 256 20 00 12 488 90 00 0 915 25 00 10 000 100 00 0 677 30 00 8 059 110 00 0 508 40 00 5 330 120 00 0 387 The QAx36xx must be used in compliance with their specifications Return sensor X11 NTC 10 kΩ as under boiler sensor DHW sensor X11 1 NTC 10 kΩ refe...

Page 125: ... RAC 31 5 V at 12 mA 50 Hz single path rectified Max contact resistance 300 Ω Cable length 5 m Programmable digital input air pressure switch X10 04 Min output voltage LMU RAC 19 V at 7 mA Typical output voltage LMU RAC 26 V at 10 mA Max output voltage LMU RAC 31 5 V at 12 mA 50 Hz single path rectified Max contact resistance 300 Ω Cable length 5 m Room thermostat time switch X10 02 Min output vol...

Page 126: ...420 AGU2 500 max 1 m Connector space Component Type of connector X11 LMU Connector RAST 2 5 12 pole Supplier e g Lumberg Duomodul 3521 12 K00 X12 LMU Connector RAST 2 5 6 pole Supplier e g Lumberg Duomodul 3521 06 K00 X13 LMU Connector RAST 2 5 5 pole Supplier e g Lumberg Duomodul 3521 05 K00 X14 LMU Connector RAST 2 5 4 pole Supplier e g Lumberg Duomodul 3521 04 K00 X15 LMU Connector RAST 2 5 3 p...

Page 127: ...uts K1 K3 When using 2 clip in modules with the LMU only 2 outputs possible Voltage AC 230 V 10 15 Current 5 mA 1 A cos ϕ 0 8 When assigning loads to outputs K1 K3 the total current draw of the LMU system must be taken into consideration Version Input Remarks AGU2 511A109 0 10 V Note polarity AGU2 513A109 0 4 20 mA Note polarity AGU2 514A109 NTC 10 kΩ Like boiler sensor AGU2 515A109 1 1 Contact ra...

Page 128: ... suitable stranded wires 2 5 mm2 Safety transformer to EN 61 558 2 6 refer to separate Siemens specification_LMU5x_transformer and fan_de_VX Y doc specification mandatory Rated data refer to separate Siemens specification_LMU5x_transformer and fan_de_VX Y doc specification mandatory Rated data refer to separate Siemens specification_LMU5x_transformer and fan_de_VX Y doc specification mandatory RAS...

Page 129: ... Siemens Building Technologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 Dimensions 11 1 LMU5x Dimensions in mm 45 5 180 59 94 97 180 35 24 51 7494m02 0702 3 5 6x 86 ...

Page 130: ...130 171 Siemens Building Technologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 2 LMU6x Dimensions in mm 200 10 140 188 38 188 67 5 66 5 7494m01 1000 212 200 8 ...

Page 131: ...mens Building Technologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 3 AGU2 500A109 AGU2 51xA109 Dimensions in mm 55 46 6 15 35 20 4 91 35 107 8 5 26 18 6 2 7494m17 0801 ...

Page 132: ...hnologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 4 AGU2 500A209 Dimensions in mm 7494m20 1 2 52 45 3 5 ø 3 2 3x 3 5 20 4 91 35 17 1 55 0 14 0 1 114 5 0 1 121 5 0 1 26 20 41 35 0 1 0 1 ...

Page 133: ...71 Siemens Building Technologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 5 OCI420A109 Dimensions in mm 55 46 6 15 35 20 4 107 8 5 26 18 6 2 7494m18 0801 47 05 18 ...

Page 134: ...ologies Basic Documentation LMU54 LMU64 CC1P7494en HVAC Products 11 Dimensions 07 11 2002 11 6 OCI420A209 Dimensions in mm 7494m21 0 1 20 20 4 3 5 114 5 0 1 121 5 0 1 41 35 8 13 75 52 0 1 45 3 5 0 1 14 1 55 0 14 ø 3 2 3x 47 05 91 55 ...

Page 135: ...VAC Products 11 Dimensions 07 11 2002 11 7 Mounting plate for clip in module Dimensions in mm 0 1 46 1 min 9 2 0 1 24 9 0 1 51 8 0 1 22 1 min 3 4 3 5 6 0 1 100 Openings for mounting 6 5 0 8 2 7 ø2 6 Material thickness in these areas 1 5 0 1 Distance between 2 modules 1 7494m19E 0102 ...

Page 136: ...ch DHW Switch off temperature for pump overrun after DHW heating 20 90 C 513 OEM 4 OEM service 114 TgradMax No meaning Maximum temperature gradient of boiler setpoint ramp in heating mode 0 no setpoint ramp 0 255 K min 518 OEM 4 OEM service 112 THG Heating mode Summer winter changeover temperature 30 C S W changeover deactivated 8 30 C 516 Enduser 6 Enduser 113 dTbreMinP Boiler Maximum control dif...

Page 137: ...ng plant s design point 1 50 537 Engineer 5 Installer 180 QmodDrehzStufen PWM pump Number of speeds of modulating pump supplier specification 2 50 540 OEM 4 OEM service 146 QmodMin PWM pump Minimum degree of modulation of modulating pump supplier specification 0 70 548 OEM 4 OEM service 147 QmodMax PWM pump Maximum degree of modulation of modulating pump supplier specification 10 100 549 OEM 4 OEM...

Page 138: ... when there is demand for heat 0 deactivated 255 4h15min 0 255 min 603 Engineer 5 Installer 475 ZqComfortAus DHW DLH Time for pump overrun in Dlh Comfort function with burner off 0 pump off with burner off 255 pump always on 0 255 min 5 Installer Setting the controller s dynamics 158 KpBw DHW Proportional coefficient of DHW controller 0 15 9375 566 OEM 4 OEM service 159 TvBw DHW Derivative action ...

Page 139: ...ngineer 5 Installer 51 N_TL_Delta Boiler Tolerance band for N_TL 0 12750 rpm 4 OEM service 52 NoG_Null Boiler Maximum fan speed on standstill 0 12750 rpm 4 OEM service 53 VmLauf Boiler Rate of change of fan control PWM rising 0 100 s 4 OEM service 54 VmLab Boiler Rate of change of fan control PWM falling 0 100 s 4 OEM service 55 VmLaufBetr Boiler Speed mod air rising in operation 0 100 s 4 OEM ser...

Page 140: ...s Initialization value of room setpoint potentiometer 10 30 C 1 L S service Development 512 TrSollRedMmiEeprom Initialization Initialization value of room setpoint potentiometer reduced 10 30 C 1 L S service Development 248 TbwSollMmiEeprom INFO values Initialization value of DHW setpoint potentiometer 10 80 C 1 L S service Development 513 TbwSollRedMmiEeprom Initialization Initialization of DHW s...

Page 141: ...9 Stoer4 4th past value of lockout code counter Engineer 710 StrPn4 4th past value of lockout phase Engineer 711 StrDia4 4th past value of internal diagnostic code Engineer 712 Stoer5 5th past value of lockout code counter Engineer 713 StrPn5 5th past value of lockout phase Engineer 714 StrDia5 5th past value of internal diagnostic code Engineer 715 Stoer_akt Current value of lockout code counter ...

Page 142: ...N6 Status code open circuit sensor channel AN6 XXX0 XXXX suppress XXX1 XXXX deliver MeldVLHz2 Status code open circuit flow sensor HC2 XX1X XXXX deliver MeldFueRelCl Status code open circuit sensor on clip in function module X0XX XXXX suppress X1XX XXXX deliver KonfigRg1 Setting flags BwVor DHW priority XXXX XX00 absolute XXXX XX10 no priority Schaltuhr1 Terminal assignment RT X10 02 can also act ...

Page 143: ...ration 4 Hz1set Heat demand 1 XX0X XXXX internal Hz2set Heat demand 2 X0XX XXXX internal HzZoSet Heat demand zone 0XXX XXXX internal KonfigRg4 Setting flags Q8Fkt System function XXXX XXX0 OFF XXXX XXX1 ON GebBauweise Type of building construction XXXX XX0X light XXXX XX1X heavy Bw Thermostat Selection of terminals on DHW thermostat XXXX X0XX DHW thermostat connected to X11 digital input XXXX X1XX...

Page 144: ...r flow supervision with pressure sensor 0XXX XXXX error leads to start prevention 1XXX XXXX error leads to a lockout position KonfigRg6 Setting flags PIDinit XXXX XXX0 internal KundenRU Locking RU of other manufacture XXXX XX0X OFF XXXX XX1X ON BwSoll Source of DHW setpoint XXXX X0XX RU if connected XXXX X1XX MMI also when a RU is connected Sperrsignal Calculation of locking signal XXXX 0XXX calcu...

Page 145: ...eat exchanger on thesecondary side SmaxIgnor Suppression of first maximum for control of the inst DHW heater XXX0 XXXX first maximum after startup will be evaluated XXX1 XXXX first maximum after startup will be ignored DlhAuslAnfo Inst DHW heat demand with aqua booster systems XX0X XXXX demand via DHW1 sensor or flow switch XX1X XXXX demand via flow switch only KonfigRg9 XXXX XX01 internal FaProgF...

Page 146: ...hutdown X0XX XXXX OFF X1XX XXXX ON N_Nachstell_lern Learning function with speed readjustment 0XXX XXXX OFF 1XXX XXXX ON FaEinstellFlags3 Setting flags of burner control section Gebl_QAA Release or use of fan parameters of QAA73 XXXX XXX0 no use of QAA fan parameters XXXX XXX1 use of QAA fan parameters Gebl_Impulse Number of pulses of fan s Hall feedback signal per revolution XXXX X00X 2 pulses pe...

Page 147: ...XXXX XX10 automatically summer XXXX XX11 automatically winter LPBKonfig0 Setting flags for LPB connection ZeitSynchro Response of LMU with regard to local time system time XXXX XX00 autonomous XXXX XX01 slave without remote adjustment XXXX XX10 system time master XXXX XX11 free ParLPBSpeisung Operating mode distributed bus power supply on LPB XXXX X0XX distributed bus power supply OFF StatLPBSpeis...

Page 148: ...imitation is inactive PhzRelMmi Relative heat output as predefined by the HMI PhzRelPc Relative heat output as predefined by the PC Pumpe_PWM Current degree of modulation of the modulating boiler pump QmodMinBw Degree of modulation during full charging of the stratification storage tank RelativeModLevel Current heat output for the RU SdAus Current switching differential off SdEin Current switching...

Page 149: ...t extensions via AGU2 500 Diagrams 48 through 63 Zone extensions e g RVA46 Diagrams 64 through 79 Heat generation manager e g RVA47 RVA65 Diagrams 80 through 95 Diagram 02 Diagram 03 B2 B3 Q3 Q1 KW WW B4 B7 20 C 7494h01_02 B2 B3 Q1 KW WW UV B7 B4 20 C 7494h01_03 Storage tank system with pump circuit Storage tank system with diverting valve electromotoric or electrohydraulic and pump circuit Diagra...

Page 150: ...at exchanger and diverting valve electromotoric or electrohydraulic and pump circuit Aqua booster and pump circuit Diagram 09 Diagram 10 B2 Q3 1 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 2 Purging valve Solar R Q1 2 0 C 7494h01E_09 B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 Solar R Q1 UV 2 0 C 7494h01E_10 Purging valve Stratification storage tank with charging pump and pump circuit Str...

Page 151: ...ge tank system with 2 pump circuits Storage tank system with diverting valve electromotoric or electrohydraulic and 2 pump circuits Diagram 36 Diagram 37 B2 Q1 B3 WW KW FS B7 Q2 20 C 7494h01_36 B2 Q3 B7 KW WW B3 B4 FS Q1 Q2 20 C 7494h01_37 Instantaneous DHW heater with primary heat exchanger and 2 pump circuits Instantaneous DHW heater with secondary heat exchanger DHW pump and 2 pump circuits Hyd...

Page 152: ...xchanger diverting valve electromotoric or electrohydraulic and 2 heating circuits Aqua booster with 2 pump circuits Diagram 41 1 Diagram 42 B2 Q3 1 B7 B3 B4 Solar V Z W W KW Storage tank 150 l Q3 2 Solar R Q1 Q2 20 C 7494h01E_41 Purging valve B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 Solar R UV Q1 Q2 20 C 7494h01E_42 Purging valve Stratification storage tank with charging pump and 2 pump ...

Page 153: ...4h01E_43 Purging valve B2 B7 UV Q1 Q2 20 C B3 KW WW B4 7494h01_44 Stratification storage tank with diverting valve and 2 pump circuits Storage tank system with diverting valve and 2 pump circuits Diagram 48 Diagram 50 B2 Q2 Y2 B1 B7 Q8 20 C 7494h01_48 B2 B3 Q3 Q1 KW WW B4 B7 Q2 Y2 B1 Q8 20 C 7494h01_50 Mixing circuit Storage tank system with one pump circuit and one mixing circuit Hydraulic diagra...

Page 154: ...electrohydraulic pump circuit and mixing circuit Instantaneous DHW heater with primary heat exchanger pump circuit and mixing circuit Diagram 53 Diagram 54 B2 Q3 B7 KW WW B3 B4 FS Q1 Q2 Y2 B1 Q8 20 C 7494h01_53 B2 B7 KW WW B3 B4 FS UV Q1 Y1 Q2 Y2 B1 20 C 7494h01_54 Instantaneous DHW heater with secondary heat exchanger DHW pump pump circuit and mixing circuit Instantaneous DHW heater with secondar...

Page 155: ...t and one mixing circuit Stratification storage tank system with charging pump one pump circuit and one mixing circuit Diagram 58 1 Diagram 59 1 B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 Solar R UV Q2 Y2 B1 Q1 Q8 20 C 7494h01E_58 Purging valve B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 2 Solar R UV Q2 Y2 B1 Q3 1 Q1 2 0 C 7494h01E_59 Purging valve Stratification storage tank with div...

Page 156: ...h diverting valve pump circuit and one mixing circuit with system pump Diagram 64 B2 Q2 1 Y2 1 B1 1 B7 Q8 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n Burner BMU Mixing circuit 1 mixing valve clip in or RVA46 Mixing circuit n RVA46 Alternatively the mixing cicuits of the RVA46 can also be additional pump circuits including combinations Mixing circuit 2 RVA46 20 C 7494h02E_64 Zone control with RVA46 Hydraulic dia...

Page 157: ...lso be additional pump circuits including combinations 20 C 7494h02E_66 Storage tank system with pump and zone control with RVA46 Diagram 67 Q2 1 Y2 1 B1 1 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n Pump circuit BMU and controller clip in B3 KW WW B4 Q8 B2 Q1 UV B7 Y1 20 C Q8 only via clip in 7494h02E_67 Alternatively the mixing cicuits of the RVA46 can also be additional pump circuits including combinations M...

Page 158: ... valve clip in or RVA46 Mixing circuit 2 RVA46 Mixing circuit n RVA46 Instantaneous DHW heater with primary heat exchanger and zone control with the RVA46 Diagram 69 Q2 1 Y2 1 B1 1 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n B2 Q3 B7 KW WW B3 B4 FS Q1 Q8 20 C 7494h02E_69 Mixing circuit 1 mixing valve clip in or RVA46 Mixing circuit 2 RVA46 Mixing circuit n RVA46 Alternatively the mixing cicuits of the RVA46 can...

Page 159: ...ircuit n RVA46 Burner with inst DHW heater and pump circuit BMU and controller clip in Instantaneous DHW heater with secondary heat exchanger diverting valve and zone control with the RVA46 Diagram 71 Q2 1 Y2 1 B1 1 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n Q8 Y1 B2 B7 KW WW B3 Q1 UV 20 C Q8 only via clip in 7494h02E_71 Mixing circuit 1 mixing valve clip in or RVA46 Mixing circuit 2 RVA46 Mixing circuit n RVA...

Page 160: ...A46 can also be additional pump circuits including combinations Purging valve Stratification storage tank system with pump and zone control with the RVA46 Diagram 74 1 Q2 1 Y2 1 B1 1 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 Solar R UV Q1 20 C Q8 7494h02E_74 Alternatively the mixing cicuits of the RVA46 can also be additional pump circuits including combinatio...

Page 161: ...itional pump circuits including combinations Boiler pump DHW circuit BMU controller clip in Stratification storage tank with diverting valve and primary supply function zone control with the RVA46 Diagram 76 Q2 1 Y2 1 B1 1 Q2 2 Y2 2 B1 2 Q2 n Y2 n B1 n B2 B7 UV Q1 20 C Q8 B3 KW WW B4 7494h02E_76 Alternatively the mixing cicuits of the RVA46 can also be additional pump circuits including combinatio...

Page 162: ... Addendum Hydraulic diagrams BMU 07 11 2002 Diagram 80 B2 B7 BMU1 Q1 BMU2 B2 B7 Q1 7494h02_80 BMUn B2 B7 Q1 Without DHW heating Diagram 81 BMU1 BMU2 B2 B7 Q1 B2 B3 Q1 KW WW UV B7 B4 7494h02_81 BMUn B2 B7 Q1 With DHW heating by a storage tank system Hydraulic diagrams cont d Heat generation manager ...

Page 163: ... B7 KW WW B3 B4 FS UV Q1 BMU1 7494h02_82 BMUn B2 B7 Q1 With DHW heating by an instantaneous DHW heater with diverting valve and secondary heat exchanger Diagram 83 BMUn BMU2 B2 B7 Q1 B2 B7 Q1 B2 B7 B3 B4 Solar V Z WW KW Storage tank 150 l Q3 Solar R UV Q1 BMU1 7494h02E_83 Purging valve With DHW heating by a stratification storage tank system Hydraulic diagrams cont d ...

Page 164: ...diagrams BMU 07 11 2002 Diagram 84 B2 B7 KW WW B3 Q1 UV BMU2 BMUn B2 B7 Q1 B2 B7 Q1 BMU1 7494h02_84 With DHW heating by an instantaneous DHW heater aqua booster Diagram 85 BMU1 BMU2 BMUn B2 B7 Q1 B2 B7 Q1 B2 B3 Q1 KW WW B7 B4 Q3 7494h02_85 With DHW heating by a storage system with DHW charging pump Hydraulic diagrams ...

Page 165: ...ction14 2 The multispeed pump must be connected according to the table in section 14 2 Legend B1 Flowsensor B2 Boiler flow sensor B3 DHW sensor 1 B4 DHW sensor 2 B5 Room sensor HC1 B6 Room sensor HC2 B7 Boiler return sensor B8 Flue gas sensor B9 Outdoorsensor PWM pump mandatory Multispeed pump single speed no PWM pump Room thermostat e g REV Room controller e g QAA73 20 C Room unit QAA70 Heating c...

Page 166: ...rams 34 37 Q1 Q3 Q1 Q2 Diagram 35 Q1 Y1 UV Q1 Y2 Diagrams 38 39 Q1 Y1 UV Q1 Y2 Diagram 41 Q1 4 Q3 2 Q3 1 Q3 1 Q2 Diagram 42 Q1 Q3 UV Q1 Q2 Diagram 44 Q1 UV Q1 Q2 Diagram 48 Q8 1 Q2 Diagrams 52 68 Q1 Q8 1 Q1 Q2 Diagrams 50 53 66 69 Q1 Q8 1 Q3 Q1 Q2 Diagrams 51 54 55 Q1 Y1 UV Q2 Diagrams 57 73 Q1 4 Q3 2 Q8 Q3 1 2 Q2 Diagrams 58 74 Q8 3 Q3 UV Q1 2 Q2 Diagrams 43 59 75 Q1 4 Q3 2 UV Q3 1 2 Q2 Diagrams ...

Page 167: ...ing protection 52 Boiler temperature control 52 Controller configuration 50 Controller delay 49 Frost protection for the boiler 49 Boiler temperature setpoint50 57 58 66 73 74 95 96 98 106 Brief description LMU 10 Burner control functions Control program 17 EEPROM 17 Forced intermittent operation 17 Program selection 17 Sequence diagram 18 C Cable lengths LMU Ö Clip In 126 LMU Ö HMI 126 Cascade ap...

Page 168: ...pervision 39 threshold 39 Forced signals 105 Frost protection AGU2 500 80 Boiler 49 52 105 DHW operation 69 DHW storage tank 56 DHW stratification storage tank 56 Instantaneous DHW 56 100 Modem function 106 Plant 55 Room 83 Functional test AGU2 500 81 Functions AGU2 500 79 AGU2 51x 89 Burner control 17 Controller 137 ECO 77 OCI420 82 Safety 11 Special 105 Supervision 11 39 System 86 G Glossary of ...

Page 169: ...liability 14 Programmable input of the LMU 106 Programmable output of the LMU 107 Pump circuit extensions 151 Pump control PWM pump 63 106 with mixing circuits 81 with pump circuits 81 Pump kick 81 106 Pump of pressureless header 108 Pump output second heating circuit 108 Pump overrun 81 PWM heating circuit pump 61 Q Quick setback constant KON 78 R Room temperature setpoint 30 32 33 72 74 Room the...

Page 170: ...emperature demands With fixed value control or emergency operation 78 With weather compensation 78 Temperature limiter 39 54 80 Terminals and wiring 119 Testing by the customer 120 Time switch 30 35 36 69 73 74 75 76 98 125 Type of building construction 71 W Warm air curtain function 106 Weather compensation30 45 47 61 69 72 73 74 78 Z Zone extensions 156 ...

Page 171: ...on LMU54 LMU64 CC1P7494en HVAC Products 07 11 2002 Siemens Building Technologies AG Landis Staefa Division Berliner Ring 23 D 76437 Rastatt Tel 0049 7222 598 0 Fax 0049 7222 53182 www landisstaefa com 2002 Siemens Building Technologies AG Subject to change ...

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