Technische Alternative UVR 63H Operation And Installation Manual Download Page 48

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Pump speed control PSC

Pump speed control PSC is not suitable for electronic or high efficiency
pumps.

Warning!

The values in the following description are by way of example only; they must, in

all cases, be matched to the system!

Absolute value

control

Set value absolute

value control

Differential

control

Set value differen-

tial control

Event

control

Set value of the

event

Set value of the

control

Wave packet or

phase angle

Proportion

part Integral

part Differential

part

Minimum

speed stage

Maximum

speed stage

Delay

time Current

speed

Setting

test

speed

The behaviour of the control circuit is equal to that of the control outputs (COP); however,
instead of 100 (COP) a maximum of 30 increments is available.

The description of the parameter values follows in the menu “COP”.

Summary of Contents for UVR 63H

Page 1: ...UVR 63H Version 7 6 EN Universal heating controller Operation Installation instructions en ...

Page 2: ......

Page 3: ...d switchover to cooling with cooler demand 22 Installation instructions 24 Sensor installation 24 Sensor lines 24 Installing the device 25 Electrical connection 25 Special connections 26 Operation 27 Change a value parameter 27 The basic control level 28 Optional displays in the basic control level 30 The status display 31 The time program menu 32 Date setting DATE 33 The parameter menu Par 34 Set...

Page 4: ...ainst being switched back on Never interchange the safety extra low voltage connections sensor connections with the 230V connections De structive and life threatening voltages at the device and the connected sensors may occur For safety reasons the system should only be left in manual mode when testing In this operating mode no maximum temperatures or sensor functions are monitored Safe operation ...

Page 5: ...s To avoid consequential damage this has to switch off the heating circuit pump independently of controller output in the event of excess temperature The speed control is only meaningful for certain conditions One is use it to limit the re turn temperature of the heating circuit In some cases it can even replace the mixer by using the speed control to hold the room temperature constant at the temp...

Page 6: ...an min1 All programs 1 As program 0 however the heating circuit pump A1 is also enabled by sensor S5 and minimum threshold min2 2 generators for the heating circuit A1 S4 min1 or S5 min2 Heating active A1 off S4 min1 A1 on Switch off cond PUMP A1 off Required settings Basic control level Time Operating mode preferably AUTO Set room temperature for lowering mode RTL Set room temperature for normal ...

Page 7: ...ge 0 100 fs 100 ACT Actual output value TST Adjustable test value adjustment range 0 100 Calling TST leads automatically to manual mode As soon as the value above the key Entry flashes the control output indicates the set values All programs 4 As program 0 however output of mixer control via the control output for mixer with 0 10V control In menu COP1 in this program there are the following settin...

Page 8: ...nd burner demand time program 1 4 hot water time program 5 Parameter menu Program number PR min1 boiler S4 A1 A2 diff1 boiler S4 cylinder S5 A2 min2 boiler S4 A3 diff2 boiler S4 NP A3 max1 cylinder S5 A2 A3 max2 boiler S4 A3 Heating curve TEMP or R RISE Flow maximum and minimum temperature PREmax PREmin Parameter frost protection mode OTF RTF Menu Men MIXER Room influence etc and PUMP Switch off c...

Page 9: ...d A3 is enabled by time program 5 the heating pump A1 is disabled A1 S4 min1 heating active not S5 max1 time program 5 All programs 2 As program 16 however load pump function only in respect of S5 inde pendent of the heating A2 S4 min1 S4 S5 diff1 S5 max1 All programs 4 As for program 16 however with output of a 0 10V voltage via the con trol output 1 for burner modulation as long as A3 is active ...

Page 10: ...The time program 5 is reserved for the hot water demand A3 S5 max1 but still deac tivated ex works Only the time programs 1 to 4 are therefore available for the heating cir cuit Program 32 As diagram 16 including the possibility of selecting all the following programs 1 2 4 8 but with a second energy source with S6 and min2 for the release of the heating circuit pump A1 and only for this and simpl...

Page 11: ... S6 min1 heating active A2 S4 min1 or S6 min1 S4 S5 diff1 or S6 S5 diff1 S5 max1 or heating not active A3 S4 max2 und S5 max1 Timeprogr 5 or S4 min2 and S6 min2 or S4 NP diff2 and S6 NP diff2 heating active The time program 5 is reserved for the hot water demand A3 S5 max1 but still deac tivated ex works Only the time programs 1 to 4 are therefore available for the heating cir cuit A1 off A2 off i...

Page 12: ...S4 S5 diff1 S5 max1 Required settings Basic control level Time Parameter menu Program number PR min1 Boiler S4 A1 diff1 Boiler S4 Cylinder S5 A1 max1 Cylinder S5 A1 FV fixed value value for return flow booster in return line S3 A2 3 Menu Men MIXER Mixer run time RT All setting parameters necessary for return flow booster program 64 are hidden in the menus A1 off S4 min1 diff1 A1 on S5 max1 A1 off ...

Page 13: ...burner demand via S6 and S2 at control output 2 A1 S4 min1 S4 S5 diff1 S5 max1 Control output COP2 10 V S6 min3 burner on 0 V S2 max3 burner off In the menu COP2 the function can be changed from NORMAL fs to INVERSE In the INVERSE setting 0 volts is output at the control output if the threshold min3 is undercut and 10V if the threshold max3 is exceeded Subsequently an auxiliary relay can be connec...

Page 14: ...off if S4 min1 S4 min1 and S5 min2 A1 on diff1 COP1 Switch off cond PUMP S6 max1 A1 off COP1 off Required settings Basic control level Time Operating mode preferably AUTO Set room temp for lowering mode RTL Set Room temp for normal operation RTN time programs for normal operation Parameter menu Program number PR min1 Boiler S4 A1 heating circuit active COP1 min2 Cylinder S5 A1 heating circuit acti...

Page 15: ...ower switch ing capacity an external relay with sufficient switching capacity must be interposed If the burner demand is directly controlled via the burner modulation no relay then within the COP2 menu there is the possibility to set the mode of the control output form NORMAL to INVERSE so that the burner demand request occurs with output of 0V instead of 10V In this program the switching mode of ...

Page 16: ...es not use control output 2 COP2 All programs 1 DHW cylinder priority heating circuit pump A1 is blocked if S6 is lower than threshold max1 Program 81 80 1 only recommended when using version 2 or 3 A1 S4 min1 or S5 min2 heating active COP1 OFF Program 83 80 2 1 A1 heating active COP1 OFF COP1 ...

Page 17: ... COP1 off Required settings Basic control level Time Operating mode preferably AUTO Set room temp for lowering mode RTL Set room temp for normal operation RTN time programs for normal operation Parameter menu Program number PR min1 Buffer S4 COP1 min3 Burner demand on S6 COP2 max1 DHW cylinder S6 COP1 max2 Burner demand off S5 COP2 max3 Burner demand off S6 COP2 diff1 Buffer S4 CYL S6 COP1 diff2 O...

Page 18: ...Set room temperature for normal operation RTN Time program for normal operation and burner demand time program 1 4 Parameter menu Program number PR min1 boiler S4 A2 min2 boiler S4 A3 diff2 boiler S4 NP A3 Heat curve TEMP or R RISE Flow maximum and minimum temperature PREmax PREmin Parameter frost protection mode OTF RTF Menu Men MIXER Room influence etc and PUMP Switch off conditions PSC Pump spe...

Page 19: ... for burner modulation as long as A3 is active For activation of A3 via Output value Heating active and S4 min2 min2 offset value OFS Heating active and S4 NP diff2 NP diff2 offset value OFS Fixed scaling 0 C 0 0 V 100 C 10 0 V Example The output value 55 C is output at the control output as 5 5 volts With A3 in operating condition OFF control output 1 is set to 0V In menu COP1 in this program the...

Page 20: ...ram 1 4 hot water time program 5 Parameter menu Program number PR min1 boiler S4 A2 A3 diff1 boiler S4 cylinder S5 A2 max1 cylinder S5 A2 Heat curve TEMP or R RISE Flow maximum and minimum temperature PREmax PREmin Parameter frost protection mode OTF RTF Menu Men MIXER Room influence etc and PUMP Switch off conditions PSC Pump speed control setting AC I3 DVA PN if necessary readjustment of the val...

Page 21: ...undershot so that the residual energy of the boiler is dissipated independent of max1 For adjustable boiler operation without the mixer it makes sense to set the threshold values min1 to PREmin and to activate the pump switch off condition PN PM in the PUMP menu A1 Thermal mixer A2 S4 min1 S4 S5 diff1 S5 max1 or heating not active A3 S4 min1 heating active All programs 1 DHW cylinder priority if S...

Page 22: ...and dependent on the S5 switch state only all programs 1 Outputs A1 Pump A2 A3 Mixer motor ON OFF COP 1 Burner demand 0V OFF 10V ON COP2 Cooler demand 0V OFF 10V ON Program 128 The cooling operation functions only in combination with the RASPT or RAS room sensor The operating mode is set using the room sensor with the aid of the slider switch Required settings Basic control level Time Parameter me...

Page 23: ...ode the burner demand is activated via control output 1 while in cooling mode the cooler demand is activated via control output 2 If the switch is switched on the demand is active The cooling operation functions only in combination with the RASPT or RAS room sensor All programs 2 Like program 128 however a buffer cylinder sensor S4 is used This sensor delivers sepa rate switching thresholds for th...

Page 24: ...ing Clip on sensor Optimally secured using roll springs pipe clamps or hose band clips to the line Make sure the material used is suitable corrosion temperature resistance etc Finally the sensor must be well insulated so that the exact pipe temperature is recorded without being influenced by the ambient temperature Outdoor temperature sensor This sensor is installed on the coldest wall usually the...

Page 25: ...n may only be carried out by a technician according to the pertinent local regulations The sensor lines must not be laid in the same cable channel as the supply voltage The maximum load of output A1 equals 1 5A while that of outputs A2 and A3 each equals 2 5A All outputs are fused together with the device itself with 3 15A In creasing the fuse protection to max 5A medium time lag is permitted The ...

Page 26: ...ith a cross section of 0 75 mm can be used for the data link e g twin strand having a max length of 30 m For longer cables we recommend the use of shielded cable If screened cables are used the screen must be connected to the sensor earth Interface to PC The data is cached via the data converter D LOGG Bootloader BL NET or C M I interface and transferred to the PC on request BL NET and C M I requi...

Page 27: ...ard direction This value now blinks and can be changed using the navigation keys By pressing the arrow key in an upward direction it is saved All display segments are momentarily displayed when the device is started up Subsequently the type designation and version number are displayed important for support queries The ex factory default setting is loaded by pressing the key during plugging in Navi...

Page 28: ...gs fs RPT TO Outdoor temperature The set flow temperature is calculated using the outdoor temperature and on the basis of the heat curve TP Flow temperature In the ideal case the measured value exactly matches the set value NP If TP is less than NP the mixer is opened if TP is greater than NP the mixer is closed Set time Temperature room sensor Temperature outside Temperature flow Calculated set f...

Page 29: ...trol of the room temperature set for lowering mode PARTY heating is carried out up to a pre set time P XX XX LEAVE from the current date up to the date MXX XX 24 00 the controller operates only in lowering mode HOLID AY public holiday mode from the current day the controller takes over the Saturday heating times until the date MXX XX and for this date the Sunday heating times STB Standby the contr...

Page 30: ...e 0V or 0 PWM 100 output voltage 10V or 100 PWM l h Current volume flow heat quantity meter 1 3 used to calculate the heat quanti ty Displays the flow rate of the volume flow encoder or the fixed volume flow in litres per hour kW Momentary determined performance heat quantity counter1 3 This value is calculated from the flow temperature return temperature and volume flow in the heat quantity count...

Page 31: ...tch off is not activated in normal operation OTLOFF The outdoor temperature switch off is not activated in normal operation MP 360 Mixer position remaining run time in seconds PRE min The calculated flow temperature has fallen below the minimum allowable tempera ture setting in Par menu The display of the symbol means that the actual flow temperature is limited by the minimum value PRE max The cal...

Page 32: ...justable in the basic control level Every time program can be assigned to any weekdays Shift worker time program SWP from version1 7 With this it is possible to create several time programs with differing heating periods and to specifically enable time windows simply by setting the parameters SWP SWP All 5 time programs are used for the heating SWP 1 Currently only time program 1 is permitted for ...

Page 33: ...e time window according to outdoor temperature This entry refers to an outdoor temperature of 10 C and is 0 at plus 20 C For example if the rate time is 30 minutes and the outdoor tempera ture is 0 C the system will switch on 20 minutes earlier under normal operation Ad justment range 0 255 min Date setting DATE M05 17 Setting of month and day Change between month and day using the downward arrow ...

Page 34: ... Max limit 1 switch on threshold Differential 1 switch on threshold 2 times Diff 1 switch off threshold 2 times Setting method temperature Set flow temp at 10 C Set flow temp at 20 C Setting method rate of rise Rate of rise acc to diagram Maximum allowable flow temp Minimum allowable flow temp Outdoor temperature threshold frost protection mode Room temperature at frost protection mode Output 1 au...

Page 35: ...bled output is disabled again from this temperature min prevents boiler sooting Recommendation The switch on point should be se lected 3 to 5K higher than the switch off point The software does not allow a differ ential less than 1K fs1 40 C fs2 60 C Setting range 20 to 150 C in 1 C increments applies to both thresholds min must however be at least 1K greater than min max Maximum limit switch off ...

Page 36: ...ence point is set at 20 C out door temperature 20 flow temperature The values for 10 C and 20 C are to be allocated in the next display windows fs 10 40 C fs 20 60 C R RISE Parameterizing the heat curve via the rate of rise as is common with many heating controllers For this purpose in the next window RR the rate of rise is to be selected according to the diagram fs 0 60 In both of these methods t...

Page 37: ...tion increases to 2 K above the frost protection limit The frost protection is activated even if a switch off condition would disable the pump The status display displays FRO and the symbol OTF Outdoor temperature threshold for frost protection mode fs 5 C Setting range 20 to 20 C RTF Room temperature threshold for frost protection mode fs 5 C Setting range 0 to 30 C Operation mode Room sensor S1 ...

Page 38: ...ed ON or OFF the program diagram no longer affects the output M AUTO As with output 1 the mixer outputs 2 3 can also be switched to manual mode for testing As soon as switching to M MAN has been done an additional display window M TEST is re leased which can be reached by pressing the right hand arrow key The lower arrow key releases the test level HALT appears in the display By continuously press...

Page 39: ...delivers a control voltage between 0 and 10 volts de pendent on the settings in the COP menu OFF the control voltage is always 0 volts ON the control voltage is always 10 volts Automatic operation Manual 0 volts Manual 10 volts The main menu Men Language Code number menu entry Sensor menu Mixer menu Heating pumps menu Pump speed control Control outputs Heat quantity counter External sensors via da...

Page 40: ...ol COP Control output available twice 0 10V PWM As analogue function 0 to 10 V output of a voltage between 0 and 10 V As fixed value of As PWM pulse width modulation output of a frequency The duty cycle ON OFF conforms to the control signal HQC Heat quantity counter Operation with volume flow encoder Operation with fixed volume flow EXT DL External sensor values from the data link Language DEUT EN...

Page 41: ...sor PT 1000 only sensor 1 KTY PT1000 Radiation sensor Fixed value Adoption of value Digital input Entry of fix value Entry of adopt value Sensor OFF Volume flow encoder encoder only sensor 6 Litres per pulse Only displayed if S6 VSG Sensor S1 Sensor S2 S6 ...

Page 42: ...ead the impulses from a volume flow encoder determining the flow rate for the heat quantity counter LPP Litres per pulse the volume flow encoder s pulse rate only when sensor type S6 VSG ex works 0 5 Setting range 0 0 to 10 0 litres pulse in increments of 0 1 litre pulse Determination of average AV Setting of the time in seconds over which an averaging of the measured value should be carried out f...

Page 43: ... burner Cylinder bottom Cylinder middle Cylinder top Every input can be assigned any of the above symbols Although it doesn t make a great deal of sense it is also possible to assign several inputs sensors the same symbol Symbol allocation has no influence on the control function ...

Page 44: ...rol As room influence is still active then if a room sensor is being used the room influence RI must be set to zero RI Room influence The respective room temperature is taken into consideration for calculating of the flow fs 50 Setting range 0 90 ISO Increase in switch on power in relative to a lowering time of 10 hours The pre vious lowering period leads to an excessive increase receding over tim...

Page 45: ...ature exceeds a specified value in lowering mode M BEH Mixer behaviour when switching off the heating pump Switch off when the set room temperature is reached ON OFF Switch off condition activate deactivate fs OFF Base temperature is the set room temperature for normal or lowering mode in the basic control level RTN RTL HYS Switching hysteresis of the base temperature fs 0 5 K Setting range 0 to 2...

Page 46: ...tivate deactivate fs ON NV Set outdoor temperature for switch off fs 18 C Setting range 20 to 99 C HYS Switching hysteresis fs 2 0 K Setting range 0 to 25 K The switching hysteresis has an upward effect Example with a switch off temperature of NV 18 C and a hysteresis of 2 0K the pump is switched off at 20 0 C as the temperature in creases and switched on again at 18 0 C as the temperature falls A...

Page 47: ...ases and switched on again at 5 0 C as the temperature falls AVT Averaging time of the outdoor temperature for the switch off the pump in minutes Compensation of fluctuating outdoor temperatures This value is identical to the mean time AVT value under the switch off condition OTNOFF fs 30 min Setting range 0 to 255 min AV Actual average value for the outdoor temperature Mixer behaviour Specifying ...

Page 48: ...Differential control Set value differen tial control Event control Set value of the event Set value of the control Wave packet or phase angle Proportion part Integral part Differential part Minimum speed stage Maximum speed stage Delay time Current speed Setting test speed The behaviour of the control circuit is equal to that of the control outputs COP however instead of 100 COP a maximum of 30 in...

Page 49: ...e pressure loss there is some noise not suit able for pumps of which the motor diameters and or length deviate markedly from 8 cm PHASE Phase angle For pump and fan motors without internal electronics The pump is switched to the mains within each half wave at a certain point in time phase Benefit Suitable for almost all types of motors Drawback Low dynamics of 1 3 for pumps A filter has to be inse...

Page 50: ...of the control output Control output deactivated 5V power supply 0 10V output PWM output OFF Control output deactivated output 0V 5V Power supply output 5V 0 to10V PID controller output 0 to 10V in 0 1V increments PWM PID controller output duty cycle 0 to 100 in 1 increments Control output number ...

Page 51: ...analogue stage Maximum analogue stage Current analogue stage Setting an ana logue test stage In this menu the parameters for the control output are specified As analogue output it can put out a voltage of 0 to 10V in 0 1V increments As PWM a digital signal with a frequency of 500 Hz level approx 10 V and a variable duty cycle from 0 to 100 is created The control outputs are deactivated at the fact...

Page 52: ... an inverse control characteristic If the return temperature increases the flow rate is reduced The absolute value control is specified using two parameter windows AC N 1 Absolute value control in normal operation whereby sensor S1 is kept con stant Normal operation N means that the speed increases with the increasing tem perature and is applicable for keeping a flow sensor constant e g boiler Inv...

Page 53: ...g the differential between two sensors are both active at the same time the slower speed wins out Event control If a set temperature event occurs the speed control starts thus keeping a sensor constant When S3 has reached 60 C activation threshold for example S1 is kept at a certain tem perature The respective stabilization of the sensor functions as it does for the absolute value control EC N31 E...

Page 54: ...er number makes the system stable but the adjustment to the set value is slower fs 0 Setting range 0 to 100 DIF 5 Differential part of the PID controller 5 The faster a deviation between set and actual value occurs the greater the tendency to short term overreaction in order to achieve compensation as fast as possible If the set value deviates at a speed of 0 5K per second the speed is changed by ...

Page 55: ...ting 0 100 corresponds to 0 10V or 0 100 PWM 100 0 corresponds to 10 0V or 100 0 PWM inverse fs 0 100 MIN Lower speed limit fs 0 MAX Upper speed limit fs 100 Control commands Using the following commands a system test see pump standstill or monitoring of the actual speed see stability problems is possible ACT 19 Currently the pump is running actual value at speed stage 19 TST 19 Currently the spee...

Page 56: ... Heat quantity meter 1 Heat quantity meter 2 Heat quantity meter 3 ON OFF Sensor flow line Sensor return line No volume flow encoder Fixed volume flow VSG to S6 encoder Assigned outputs Frost protection share Sensor comparison Meter delete ...

Page 57: ...se Setting range VSG S6 volume flow encoder at input 6 VSG E1 to E9 Value from external sensor via DL Bus VSG no volume flow encoder fixed volume flow For the calculation of the heat amount the set volume flow is only used if the set output is active V Volume flow in litres per hour Without a volume flow encoder a fixed volume flow can be set in this menu If the set output is not active the volume...

Page 58: ...ty is added NOTICE As the internal storage EEPROM has only a limited number of write cycles the totalled heat quantity is saved only once per hour For this reason it is possible that a power failure can result in loss of the heat quantity data for one hour Notes on accuracy A heat quantity meter can only be as accurate as the sensors and the movement of the measuring device In the range from 10 C ...

Page 59: ...in level E1 11 The front number indicates the address of the external sensor This can be set to between 1 and 8 on the sensor according to its operating instructions The rear number indicates the index of the sensor value Since external sensors can transmit numerous values the value required from the sensor is defined via the index The setting of the address and index can be taken from the respect...

Page 60: ...resistance measured with an ohmmeter should have following value according to temperature Temp C 0 10 20 25 30 40 50 60 70 80 90 100 R Pt1000 Ω 1000 1039 1078 1097 1117 1155 1194 1232 1271 1309 1347 1385 R KTY Ω 1630 1772 1922 2000 2080 2245 2417 2597 2785 2980 3182 3392 The factory setting of the parameter and menu functions can be restored at any time by pressing the lower key Entry during plugg...

Page 61: ...value E3 Sensor S3 TP C External value E4 Set flow temp NP C External value E5 Sensor S4 C External value E6 Sensor S5 C External value E7 Sensor S6 C External value E8 Speed stage SPS External value E9 Analogue stage 1 ANL Analogue stage 2 ANL Heating circuit controller Desired room temperature Status display Lowering mode RTL 15 C C Operating mode Normal operation RTN 22 C C Additional par mode ...

Page 62: ... C C min3 on 40 C C diff1 on 8 K K diff1 off 4 K K diff2 on 8 K K diff2 off 4 K K TEMP 10 40 C C TEMP 20 60 C C R RISE RR 0 60 PREmax 70 C C PREmin 30 C C OTF 5 C C RTF 5 C C Output 1O AUTO Output 2 3 M AUTO Control output C1 AUTO Control output C2 AUTO Sensor type SENSOR Sensor S1 RPT Average determ AV 1 1 0 s s Sensor S2 PT1000 Average determ AV 2 1 0 s s Sensor S3 PT1000 Average determ AV 3 1 0...

Page 63: ...nal part PRO 5 Integral part INT 0 Differential part DIF 0 Minimum speed MIN 0 Maximum speed MAX 30 Delay time ALV 0 Control output 0 10V PWM COP Control output COP 1 OFF 5V 0 10V PWM OFF Outputs OP Abs value control AC Desired value DVA 50 C C Differential control DC Desired value DVD 10 K K Event control EC Threshold value TVE 60 C C Desired value DVE 130 C C Proportional part PRO 5 Integral par...

Page 64: ...ensor E8 External sensor E9 External sensor E9 Information on the Eco design Directive 2009 125 EC Product Class1 2 Energy effi ciency3 Standby max W Typ power con sumption W 4 Max power consumption W 4 UVR63 H5 max 6 max 4 1 8 1 49 2 37 1 8 2 8 1 Definitions according to Official Journal of the European Union C 207 dated 03 07 2014 2 The classification applied is based on optimum utilisation and ...

Page 65: ... inductive cos phi 0 6 2 control outputs 0 10V 20mA switchable to PWM 10V 500 Hz supply 5 V DC 10 mA or connection of the auxiliary relay HIREL STAG Cylinder sensor BF diameter 6 mm incl 2 m cable BF PT1000 to 90 C continuous load BF KTY to 90 C continuous load Boiler sensor KE diameter 6 mm incl 2 m cable KE PT1000 to 160 C continuous load momentary to 180 C KE KTY to 160 C continuous load The se...

Page 66: ...old and similar use Part 1 General requirements EN 61000 6 3 2007 A1 2011 AC2012 Electromagnetic compatibility EMC Part 6 3 Generic standards Emission standard for residential commercial and light industrial envi ronments EN 61000 6 2 2005 AC2005 Electromagnetic compatibility EMC Part 6 2 Generic standards Immunity for industrial environments EN 50581 2012 Technical documentation for the assessmen...

Page 67: ......

Page 68: ...g and installation instructions or incorrect maintenance 4 The guarantee claim will expire if repairs or actions are carried out by persons who are not au thorised to do so or have not been so authorised by us or if our devices are operated with spare supplementary or accessory parts which are not considered to be original parts 5 The defective parts must be sent to our factory with an enclosed co...

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