Siemens RWF 50.2 Скачать руководство пользователя страница 42

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The parameters are shown on the lower setpoint display (green) and their values on the
upper/actual value display (red).

z06/

091

Parameter Display

Value

range

Factory
setting

Remarks

Proportional band ¹

Pb1

1...9999 digit

Influences the controller’s P-action

Derivative time

0...9999 s

Influences the controller’s D-action
With dt = 0, the controller has no D-action

Integral action time

0...9999 s

350

Influences the controller’s I-action
With rt = 0, the controller has no I-action

Dead band (neutral
zone) ¹

0.0...999.9 digit

For 3-position output

100%

-100%

7866d13/0911

Controlling element
running time

10...3000 s

Running time of the positioning valve for use
with modulating controllers

Switch-on threshold
Heating controller ¹

HYS1

-1999...0.0 digit

-5



Reference!
See chapter 5.2

High-fire operation

Switch-off threshold
stage II
Heating controller ¹

HYS2

0.0...

HYS3

digit



Reference!
See chapter 5.2

High-fire operation

Switch-off threshold
Heating controller ¹

HYS3

0.0...9999 digit



Reference!
See chapter 5.2

High-fire operation

Switch-on threshold
Cooling controller ¹

HYS4

0.0...9999 digit



Reference!
See chapter 5.2

High-fire operation

Switch-off threshold
stage II
Cooling controller ¹

HYS5

HYS6

...0.0 digit

-3



Reference!
See chapter 5.2

High-fire operation

Switch-off threshold
Cooling controller ¹

HYS6

-1999...0.0 digit

-5



Reference!
See chapter 5.2

High-fire operation

Response threshold

0.0...999.9



Reference!
See chapter 5.5

Response threshold

(q)

Setting of decimal place has an impact on this parameter



Note!
When using the RWF50… as a modulating controller only, or as a modulating
controller without the burner release function (1P, 1N), parameter

HYS1

must be set to

and parameters

HYS2

and

HYS3

must be set to their

maximum

values.

Otherwise, for example, when using default parameter

HYS1

(factory setting -5), the 3-

position controller is only released when the control deviation reaches -5 K.

Display of controller
parameters

40/68

20089337

Содержание RWF 50.2

Страница 1: ...20089337 2 05 2015 Installation use and maintenance instructions Compact universal controllers MODEL Kit RWF 50 2 GB ...

Страница 2: ...20089337 Translation of the original instructions ...

Страница 3: ... modulating or multistage burners and air conditioning systems User Manual The RWF50 2 RWF50 3 and this User Manual are intended for use by OEMs which integrate the controllers in their products Caution All safety warning and technical notes contained in the Data Sheet on the RWF50 N7866 also apply to this document ...

Страница 4: ...2 68 20089337 ...

Страница 5: ...Supplementary documentation Data Sheet RWF50 N7866 Environmental Declaration RWF50 E7866 3 68 20089337 ...

Страница 6: ...4 68 20089337 ...

Страница 7: ...troller in a panel cutout 15 3 5 Removing the controller from the panel cutout 16 3 6 Cleaning the front 16 4 Electrical connections 17 4 1 Installation notes 17 4 2 Galvanic separation 18 4 3 Assignment of terminals 19 5 Operating modes 21 5 1 Low fire operation 21 5 2 High fire operation 22 5 2 1 Modulating burner 3 position output 22 5 2 2 Modulating burner analog output 23 5 2 3 2 stage burner...

Страница 8: ... setting function in high fire operation 48 9 2 Checking the controller parameters 50 10 PC software ACS411 51 10 1 Safety notes 51 10 2 Setting the correct system parameters 51 10 3 Changing the parameters 51 10 4 Place of installation 52 10 5 License and liability regulations 52 10 6 Procurement of PC software ACS411 52 10 7 Languages 52 10 8 Operating systems Operating 52 10 9 Prerequisites for...

Страница 9: ...6 12 2 Monitoring the measuring circuit 57 12 3 Controller outputs OutP Controller o 57 12 4 Controller 57 12 5 Electrical data 58 12 6 Housing 58 12 7 Environmental conditions 59 12 8 Segment display 59 12 9 Standards and certificates 59 13 Key 61 14 List of figures 63 7 68 20089337 ...

Страница 10: ...l times Version This User Manual describes all necessary settings applicable to controller software version XXX 01 01 Reference See chapter 6 7 Display of software version Should any problems arise during commissioning do not make any unauthorized manipulations on the unit You could endanger your rights under the warranty terms Please contact us in such a case 8 68 20089337 ...

Страница 11: ...ler may only be used on the applications described in the technical documentation and only in connection with devices or components from other suppliers that have been approved or recommended by Siemens The product can only function correctly and safely if shipped stored set up and installed correctly and operated and maintained as specified 1 2 2 Warning symbols The symbols for Caution and Attent...

Страница 12: ...a period Action An asterisk indicates that a required action is described The individual steps are indicated by asterisks for example Press 1 2 4 Presentation Buttons Buttons are shown in a circle Either symbols or text are possible If a button has multiple assignments the text shown is always the text corresponding to the function currently used Button combinations Two buttons shown in combinatio...

Страница 13: ...ure two 4 digit 7 segment displays for the actual value red and the setpoint green The RWF50 2 has a 3 position output consisting of 2 relays to open or close a controlling element The RWF50 3 has an analog output In modulating mode the RWF50 operates as a PID controller In 2 stage mode the RWF50 provides control based on the set switching threshold Using the binary input a change to a second setp...

Страница 14: ...1 4 Block structure Only RWF50 3 Only RWF50 2 Air damper control Figure 1 Block structure 12 68 20089337 ...

Страница 15: ...ing voltage given on the type field Product no Description RWF50 20A9 Basic version with 3 position output single pack RWF50 21A9 Basic version with 3 position output multipack RWF50 30A9 Basic version with analog output single pack RWF50 31A9 Basic version with analog output multipack 2 2 Scope of delivery Type of controller as ordered User Manual Location Example Product nos 13 68 20089337 ...

Страница 16: ...ntroller should be installed away from sources of electromagnetic fields such as variable speed drives or high voltage ignition transformers Relative humidity 95 noncondensing Ambient temperature 20 50 C Storage temperature 40 70 C 3 2 Dimensions 7866m01 0112 92 Figure 2 Dimensions of RWF50 Key 1 USB interface setup 2 Panel cutout 14 68 20089337 ...

Страница 17: ...t the seal supplied with the controller Attention The controller must be installed with the seal preventing water or dirt from entering the housing 7866z02 0112 1 2 3 3 Figure 3 Mounting in a panel cutout Insert the controller from the front into the panel cutout 1 and make certain the seal is correctly fitted Fit the frame from the rear 2 and let it engage in the grooves Tighten the screws evenly...

Страница 18: ... they do not get squeezed between control panel and housing 3 6 Cleaning the front The front of the controller can be cleaned with normal washing rinsing agents or detergents Attention The front of the controller is not resistant to corrosive acids caustic solutions and abrasive cleaners Do not clean with high pressure cleaners 16 68 20089337 ...

Страница 19: ...sing of the output relays must give consideration to the maximum permissible relay current Reference See chapter 12 3 Controller outputs OutP No other loads may be connected to the controller s main power supply terminals The electromagnetic compatibility and interference suppression levels conform to the standards and regulations listed under Technical data Reference See chapter 12 5 Electrical d...

Страница 20: ...D Buttons For resistor thermometer or standard signals D1 For potential free contacts Setup For PC software ACS411 InP Power supply measuring transducer G G DC 24 V 10 max 25 mA short circuit proof Only RWF50 3 Analog output A A Burner release 1P 1N Relay NO contact Power consumption at AC 110 240 V 10 15 48 63 Hz Max 16 VA 7866d02e 1212 Figure 4 Test voltages 18 68 20089337 ...

Страница 21: ...rminal no Connection diagram Relay Burner release Relay K1 P 1N 1P pole 1N NO contact 1P P S 1N 7866a01 0911 Only RWF50 2 3 position output Relay K3 Controlling element CLOSE Relay K2 Controlling element OPEN K3 NO contact KQ common pole K2 NO contact P S K3 KQ K2 S P 7866a02 0911 Only RWF50 3 Analog output A A DC 0 4 20 mA DC 0 10 V A A A A 7866a03 0911 19 68 20089337 ...

Страница 22: ... input DC 0 5 V 1 5 V 0 10 V 11 13 13 11 7866a06 0911 Ux Binary inputs binF Terminal no Connection diagram Binary input D1 D1 Common ground DG DG D1 DG 7866a08 0911 Power supply Terminal no Connection diagram Power supply AC 110 240 V 10 15 48 63 Hz L1 Live conductor N Neutral conductor L1 N 7866a09 0911 Power supply measuring transducer short circuit proof G G G G 7866a10 0412 DC 24 V 10 max 25 m...

Страница 23: ...imed at reducing wear ON OFF 7866d03e 1011 Figure 6 Control sequence of heating controller Modulating and 2 stage operation Actual value lies between switch on threshold HYS1 and switch off threshold HYS3 If the controller is set to cooling mode temperature limits HYS4 and HYS6 apply In that case relay K1 Burner release is used for controlling the cooling equipment 7866d04e 1011 ON OFF Figure 7 Co...

Страница 24: ...area 1 the thermostat function is active The lowest burner stage is switched on below switch on threshold HYS1 and switched off above switch off threshold HYS3 7866d05 0911 Figure 8 Control sequence of modulating burner 3 position output Here operating mode Modulating burner is shown In high fire operation the 3 position controller acts on an actuator via relay K2 OPEN and relay K3 CLOSE When the ...

Страница 25: ...chapter 5 2 1 Modulating burner 3 position output If the controller is set to cooling mode the respective values HYS4 and HYS6 apply Starting from a high actual value the controller now controls the connected cooling equipment in low fire operation In high fire operation the cooling output is controlled via relays K2 and K3 or the analog output The response threshold q calculates automatically now...

Страница 26: ...shold HYS2 7866d07 0911 Figure 10 Control sequence of 2 stage burner 3 position output In area 3 the actual value exceeds the upper switch off threshold HYS3 and the controller shuts down the burner B The controller only starts low fire operation when the actual value falls again below switch on threshold HYS1 If the response threshold q is exceeded the controller switches to high fire operation A...

Страница 27: ...he controller is set to cooling mode the respective values of HYS4 HYS5 and HYS6 apply Starting from a high actual value the controller now controls the connected cooling equipment in low fire operation In high fire operation the second stage and thus the cooling output are controlled via relays K2 and K3 or the analog output The response threshold q calculates automatically now in the reverse sen...

Страница 28: ... InP1 the controller cannot monitor the actual value Burner shutdown will automatically be triggered to guard against overheating Burner off 3 position output for closing the controlling element Self setting function is ended Manual control is ended Functions 26 68 20089337 ...

Страница 29: ...e amount of dSP A contact at binary input D1 controls the changeover or shift The values for setpoints SP1 SP2 and dSP are to be entered at the operating level Reference See chapter 6 Operation Contact at binary input D1 Open 0 Closed 1 D1 DG D1 DG Chapter 4 3 Assignment of pins SP1 SP2 dSP 0 1 0 1 0 1 2 SPH oLHi SPL oLLo Active setpoint Chapter 8 2 Controller Cntr Function of binary input D1 bin1...

Страница 30: ...r level this causes the second burner stage to switch on or in the case of the 3 position controller modulating controller the controlling element to open If the current boiler temperature reaches the required setpoint qeff is reset to 0 7866d09e 0412 q q q q Temperature C Figure 13 Control sequence response threshold q In contrast to time dependent switching on load dependent switching on offers ...

Страница 31: ...rol deviation x w drops below a certain limit value This limit is calculated as follows Limit value 2 x HYS1 HYS3 In that case the response threshold q is inactive independent of operating mode and controlled variable temperature or pressure Operating mode Modulating 3 position output HYS1 5 K HYS3 5 K w 60 C Limit value 2 x 5 5 2 x 10 20 K At an actual value below 40 C heating up immediately star...

Страница 32: ... is calculated as follows Limit value 2 x HYS4 HYS6 Operating mode Modulating 3 position output HYS4 5 K HYS6 5 K w 30 C Limit value 2 x 5 5 2 x 10 20 K When the actual value lies above 10 C cooling is immediately started in high fire mode in place of low fire mode Cooling controller Example 30 68 20089337 ...

Страница 33: ...ler In that case the setpoint is approached via a ramp function Gradient and slope of the ramp rASL are adjustable The setpoint ramp has a symmetrical tolerance band toLP If during the startup phase the actual value leaves the tolerance band the setpoint ramp is stopped until the actual value returns to a level within the tolerance band The startup phase is ended when the setpoint of the ramp func...

Страница 34: ... the actual value The lower display green shows the setpoint Reference See chapter 8 6 Display diSP When entering parameters the parameter symbol at the bottom green and the set value at the top red appear The actual value is shown on the actual value display red and tUnE flashes on the setpoint display green Reference See chapter 9 Self setting function The actual value display red shows 9999 fla...

Страница 35: ...l or via PC software ACS411 Reference See chapter 8 6 Display diSP Manual control self setting the user parameter and configuration levels can be activated from here Basic display Enter 7866d11e 0212 Enter Setpoint increase factory set SP1 Setpoint reduce factory set SP1 ESC 2 s or timeout Enter OPr Enter User level OPr SP1 SP2 dSP InP Y Editable or Only display Navigation principle Enter ESC One ...

Страница 36: ...s so that SP1 appears Press and SP1 flashes Press or to adjust the required setpoint and press to confirm Timeout after about 180 seconds Note If the setpoint is not stored the basic display changes after the timeout tout and the former setpoint is maintained The value changes only within the permitted range Changing the setpoints Timeout 34 68 20089337 ...

Страница 37: ...ing element as long as is kept depressed Relay K3 closes the controlling element as long as is kept depressed The 2 yellow arrows indicate when relay K2 opens or relay K3 closes the controlling element Change angular positioning by pressing or Adopt flashing new angular positioning by pressing Per default the analog output delivers the current angular positioning Return to automatic operation by k...

Страница 38: ...10 V or 20 mA Controlling element opens Or press briefly RWF50 2 RWF50 3 Relay K2 is inactive Relay K3 is active The analog output delivers the lowest value depending on setting DC 0 V 4 mA or 0 mA Controlling element closes Return to automatic operation by pressing for 5 seconds Note If the thermostat function deenergizes relay K1 during manual control manual control is ended 36 68 20089337 ...

Страница 39: ... Figure 19 Display of self setting function When tUnE stops flashing the self setting function has been ended The parameters calculated by the controller are automatically adopted Note It is not possible to start tUnE in manual control or low fire operation Start Cancel 37 68 20089337 ...

Страница 40: ...7866z05 0911 Figure 20 Display of software version Press again RWF50 X 7866z12 0112 Figure 21 Display segment test All display segments and LEDs light up the actual value display red flashes for about 10 seconds Segment test 38 68 20089337 ...

Страница 41: ...evel back One level down Next previous parameter PArA Enter Parameter level PArA HYS1 HYS2 HYS3 HYS4 HYS5 HYS6 Pb1 dt rt db tt Heating controller Cooling controller Only RWF50 2 Enter Configuration level ConF InP1 Cntr rAFC binF diSP Analog inputs Controller Thermal shock protection Binary inputs Display Only RWF50 3 Controller outputs OutP ConF Figure 22 Parameterization Access to this level can ...

Страница 42: ...0 HYS3 digit 3 Reference See chapter 5 2 High fire operation Switch off threshold Heating controller HYS3 0 0 9999 digit 5 Reference See chapter 5 2 High fire operation Switch on threshold Cooling controller HYS4 0 0 9999 digit 5 Reference See chapter 5 2 High fire operation Switch off threshold stage II Cooling controller HYS5 HYS6 0 0 digit 3 Reference See chapter 5 2 High fire operation Switch ...

Страница 43: ...e level back One level down Next previous parameter PArA Enter Parameter level PArA HYS1 HYS2 HYS3 HYS4 HYS5 HYS6 Pb1 dt rt db tt Heating controller Cooling controller Only RWF50 2 Enter Configuration level ConF InP1 Cntr rAFC binF diSP Analog inputs Controller Thermal shock protection Binary inputs Display Only RWF50 3 Controller outputs OutP ConF Figure 23 Configuration Access to this level can ...

Страница 44: ...ed inadmissible values of the control variable can be produced Measured value corrections must therefore be made within certain limits only Start of display SCL1 Scale low level 1999 0 9999 End of display SCH1 Scale high level 1999 100 9999 In the case of a measuring transducer with standard signal the physical signal is assigned a display value here Example 0 20 mA 0 1500 C The range of the physi...

Страница 45: ...ation high 1999 9999 Setpoint limitation prevents values from being entered outside the defined range 0 Free 1 Locked Self optimization Self optimization can only be disabled or enabled via the ACS411 setup program If disabled via ACS411 PC software self optimization cannot be started via the controller s buttons Setting in the ACS411 setup program Controller Self optimization Self optimization is...

Страница 46: ... TSS a tolerance band can be laid about the setpoint curve If the limit values are crossed the ramp is stopped Reference See chapter 5 7 Thermal shock protection TSS Tolerance band ramp toLP Tolerance band ramp 2 x HYS1 10 9999 Cooling controller Smallest possible factory setting 2 x HYS4 10 K Note In the event of a faulty sensor or manual control the ramp function is stopped The outputs behave th...

Страница 47: ...put The analog output offers the following setting choices ConF OutP Parameter Value selection Description 1 Analog input InP1 is delivered Function FnCt Function 4 Controller s angular positioning is delivered modulating controller 0 0 20 mA 1 4 20 mA 2 DC 0 10 V Signal type SiGn Type of signal Physical output signal Value when out of range rOut Value when out of range 0 101 Signal in percent whe...

Страница 48: ...apter 5 4 Predefined setpoint ConF binF Parameter Value selection Description 0 No function 1 Setpoint changeover 2 Setpoint shift Binary input bin1 Binary inputs 4 Changeover of operating mode Burner modulating Contacts D1 and DG open Burner 2 stage Contacts D1 and DG closed 46 68 20089337 ...

Страница 49: ...put InP1 4 Controller s angular positioning 6 Setpoint Lower display diSL Lower display 7 End value with thermal shock protection Timeout tout 0 180 255 Time s on completion of which the controller returns automatically to the basic display if no button is pressed 0 No decimal place 1 One decimal place 2 Two decimal places Decimal point dECP Decimal point If the value to be displayed cannot be sho...

Страница 50: ... the controlled system to angular positioning steps according to a special procedure A complex control algorithm uses the response of the controlled system actual value to calculate and automatically store the control parameters for a PID or PI controller set dt 0 The tUnE procedure can be repeated any number of times Self setting function Start PID controller draft Identification of the Controlle...

Страница 51: ...he setpoint is performed X 7866d19 0911 Figure 26 Small control deviation The data of the controlled system recorded for the forced oscillations are used to calculate the controller parameters rt dt Pb1 and a filter time constant dF1 for actual value filtering that is optimized for this controlled system High fire operation in modulating burner mode The thermostat function relay K1 must be constan...

Страница 52: ... 3rd order controlled system for a PID controller The method used for adjusting the controller parameters can however also be applied to other controlled systems A suitable value for dt is rt 4 Pb too small Pb too large t x w 7865d17 1099 Figure 27 Pb too small t x w 7865d15 1099 Figure 28 Pb too large rt dt too small rt dt too large t x w 7865d16 1099 Figure 29 rt dt too small t x w 7865d14 1099 ...

Страница 53: ...and wrong parameter values the user must check the correct function of the plant in a conventional way both during and after commissioning and if required ensure manual shutdown 10 2 Setting the correct system parameters Caution It should be noted that the characteristics of the universal controller are determined primarily by the parameter settings made rather than by the type of unit It is espec...

Страница 54: ...PORTANT PLEASE READ CAREFULLY 10 6 Procurement of PC software ACS411 For ordering the ACS411 software and updates please contact your supplier or heating engineer 10 7 Languages PC software ACS411 is available in English and German To select the language you require go to program menu item File Default settings Program language ACS411 setup program must be restarted 10 8 Operating systems Operatin...

Страница 55: ...d on a CD Insert CD in the CD or DVD drive Setup starts automatically Follow the instructions appearing on the screen Connect PC and controller via the USB cable New hardware is identified and USB driver installed This may take a few minutes Follow further instructions given on the screen and wait until the installation is successfully completed 53 68 20089337 ...

Страница 56: ...ontroller shall be powered via the USB port a HUB with power supply is required capable of delivering at least 500 mA at every outlet When supplying power via the USB port relays and analog output are deenergized to reduce power consumption Note Check to ensure that power supply to the measuring converter G and G is not connected This increases power usage via the USB port as well The measuring ac...

Страница 57: ...value exceeded limit The measured value is too great lies outside the measuring range or the sensor is faulty Measured value dropped below limit The measured value is too small lies outside the measuring range or the sensor has a short circuit Reference See chapter 8 1 Analog input InP1 11 2 Others Display Cause Remedy Remove USB connection Reference See chapter 10 PC software ACS411 On the upper ...

Страница 58: ...ot required with 3 wire circuits With 2 wire circuits line balancing can be performed by making an actual value correction 12 1 2 Input signals Measuring range Measuring accuracy a Impact of ambient temperature Voltage DC 0 10 V 0 1 100 ppm K Input resistance RE 2 M Voltage DC 0 1 5 V 0 2 200 ppm K Input resistance RE 2 M Current 0 4 20 mA 0 1 100 ppm K Voltage drop 2 V a Accuracies relate to the ...

Страница 59: ...uit proof The following relay data are those specified by the supplier Relay K2 KQ controlling element OPEN Contact rating Max 1 A at AC 250 V and cosφ 0 6 Contact life 100 000 switching cycles at high fire Contact protection RC combination Relay K3 KQ controlling element CLOSE Contact rating Max 1 A at AC 250 V at cosφ 0 6 Contact life 100 000 switching cycles at high fire Contact protection RC u...

Страница 60: ...cable socket in fork form for M3 thread dimensions to DIN 46237 With UL applications Use of the cable lug or ferrules to UL486A B UL listed or recognized Tightening torque 0 5 Nm Electromagnetic compatibility DIN EN 61326 1 Emitted interference Class B Immunity Meeting industrial requirements 12 6 Housing Type of housing Made of Makrolon for control panel mounting to DIN IEC 61554 use in indoor Co...

Страница 61: ...ange 20 50 C Humidity 95 r h Installation altitude Max 2 000 m above sea level Attention Condensation formation of ice and ingress of water are not permitted 12 8 Segment display Height of numerals Upper display 10 mm Lower display 7 mm Color Upper display Red Lower display Green Digits 4 including 0 1 or 2 decimal places configurable Range of display 1999 9999 12 9 Standards and certificates Conf...

Страница 62: ...60 68 20089337 ...

Страница 63: ...itch off threshold cooling controller HYS6 Switch off threshold cooling controller InP Analog input InP1 Analog input 1 OFF1 Correction of measured value oLHi Upper working range limit oLLo Lower working range limit OPnt Zero point OPr User OutP Control outputs PArA Parameter Pb Proportional range Pb1 Proportional range 1 q Response threshold qeff Sum of all integrals rAFC Thermal shock protection...

Страница 64: ...int reached thermal shock protection TSS no longer active toLP Tolerance band of ramp tout Timeout tt Running time of controlling element Unit Unit of temperature W Setpoint Y Angular positioning 62 68 20089337 ...

Страница 65: ...angeover or setpoint shift 27 Figure 13 Control sequence response threshold q 28 Figure 14 Control sequence Cold start of plant 29 Figure 15 Thermal shock protection TSS 31 Figure 16 Meaning of display and buttons 32 Figure 17 Display start 33 Figure 18 Basic display 33 Figure 19 Display of self setting function 37 Figure 20 Display of software version 38 Figure 21 Display segment test 38 Figure 2...

Страница 66: ...64 68 20089337 ...

Страница 67: ...de mounting 15 Introduction 8 Block structure 12 Control 11 Cooling controller 11 Correct use 9 Description 11 General notes 8 Mounting 11 Notification symbols 10 Presentation 10 Qualified personnel 9 Safety notes 9 Typographical conventions 9 Use in heating plants 11 Warning symbols 9 K Key 61 O Operating modes 21 2 stage burner 3 position output 24 2 stage burner analog output 25 Burner shutdown...

Страница 68: ...4 S Self setting function 48 2 procedures 49 Checking the controller parameters 50 Conditions 49 Self setting function in high fire operation 48 T Technical data 56 Binary input D1 56 Controller 57 Controller outputs OutP 57 Electrical data 58 Environmental conditions 59 Housing 58 Input signals 56 Inputs 56 Monitoring the measuring circuit 57 Resistance thermometers 56 Segment display 59 Standard...

Страница 69: ......

Страница 70: ......

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Страница 72: ...Manufactured by Subject to modifications RIELLO S p A I 37045 Legnago VR Tel 39 0442 630111 http www riello it http www riello com ...

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