SOLZAIMA SZM A PLUS 16 kW Instruction Manual Download

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Pellet Boilers

Instruction Manual

English

Models

SZM A PLUS 16 kW

SZM A PLUS 24 kW

SZM A PLUS 32 kW

Read these instructions carefully before installing, using and servicing the unit. The

product is supplied with this instruction manual.

Mod.946-A

Summary of Contents for SZM A PLUS 16 kW

Page 1: ...ction Manual English Models SZM A PLUS 16 kW SZM A PLUS 24 kW SZM A PLUS 32 kW Read these instructions carefully before installing using and servicing the unit The product is supplied with this instruction manual Mod 946 A ...

Page 2: ... regulations including but not limited to national and European standards must be observed when installing operating and servicing the unit For assistance please contact the unit s supplier or installer Remember to provide the serial number of your boiler which is detailed on the identification plate located on the back panel of the unit as well as on the sticker found on the plastic cover of this...

Page 3: ...ement 225L optional 13 6 Installation of pipes and fume exhaust systems 18 6 1 Installation without a chimney 18 6 2 Installation with chimney 24 6 3 Hydraulic installation 25 6 4 Electrical installation 28 7 Fuel 30 8 Use of the pellet run boiler 31 9 Display 32 9 1 Home screen 32 9 2 Viewing and eliminating errors 34 9 3 Settings menu 35 9 4 Display menu 37 9 5 Info menu 38 9 6 Chrono menu 38 10...

Page 4: ...nnection to central heating radiators and sanitary water combined with solar panel 63 16 3 Connection to central heating radiators with inertia tank and installation pump 64 16 4 Combined heating connection hot water with inertia tank and domestic hot water 65 17 Electrical connection diagram 66 18 Circulator pump operation 67 19 Annexes 70 19 1 Function flow diagrams 70 20 Life cycle of a pellet ...

Page 5: ...s network of partners Solzaima is currently leader in the production of biomass heating systems best illustrated by its water heat recovery central heating units and its range of pellet stove fires and boilers We deliver biomass heating units to approximately 20 000 homes every year This effectively demonstrates consumers interest in more ecological and economic solutions Solzaima was awarded the ...

Page 6: ...talled and how it will be transported before you start We recommend the use of a manual pallet truck for transport To unpack the boiler start by removing the screws that connect the wooden frame to each other and to the pallet Disassemble the frame into as many pieces as necessary to remove it safely Place the boards in a safe place as nails and staples can be dangerous Carefully cut the plastic b...

Page 7: ...of the boiler Remove the bolts to remove the boiler from the pallet Carefully lower the body of the pallet making sure to do so on a protected floor area Although the boiler has rubber levelling feet there are protruding metal parts which can easily damage the floor Figure 2 Unpacking the boiler ...

Page 8: ...integrity and completeness If the package contents do not correspond to the parts list specified on item 2 please contact the entity from whom you purchased the unit All the unit s components guarantee its operation and energy efficiency and should only be replaced with original parts provided by an authorised technical assistance centre The equipment must be serviced at least once a year for this...

Page 9: ...fety systems The pellet run boiler is a biomass heating unit equipped with an electric fume extractor The occurrence of any power failure during its use may prevent fume extraction and the room will be filled with smoke For this reason you should have a natural fume extraction system like a chimney available If you intend to use your boiler when leaving it unattended or while you are away from hom...

Page 10: ...f a chimney fire In case of fire either in the equipment or in the smoke ducts follow the instructions below in the order given Put the fire out without putting your life in danger If you cannot put the fire out in one minute call the fire brigade Close the doors and windows or the room where the fire occurred Turn off the electricity and the gas before leaving home Once outside your home provide ...

Page 11: ...lectric power 25 25 35 W Electric power in start up 10 min 410 410 410 W Stand by electric power 5 3 5 3 4 2 W Rated voltage 230 230 230 V Nominal frequency 50 50 50 Hz Thermal yield at rated thermal power 91 0 91 3 91 7 Thermal yield at reduced thermal power 92 1 91 6 91 3 Max gas temperature 104 1 112 9 123 4 ºC Min gas temperature 63 2 65 7 67 3 ºC CO emissions at rated thermal power 10 O2 0 01...

Page 12: ...ide Rear Top Figure 3 A Dimensions of the SZM A PLUS 16 kW boiler SZM A PLUS 24 kW Front Side Rear Top Figure 3 B Dimensions of the SZM A PLUS 24 kW boiler SZM A PLUS 32 kW Front Side Rear Top Figure 3 C Dimensions of the SZM A PLUS 32 kW boiler ...

Page 13: ...9 4 2 Connections views Figure 4 Pellet boilers connections SZM A PLUS 16 24 and 32 kW ...

Page 14: ...t by turning them so that they all bear the same load and the machine is level Figure 5 Unpacking the boiler Connect a duct of suitable diameter between the flue gas outlet and a flue for exhausting fumes to the outside of the building e g chimney see diagrams in sections 6 1 and 6 2 Carrying out the hydraulic installation see 6 3 Connect the 230VAC supply cable to an earthed mains socket The mach...

Page 15: ...iling of the room especially if these contain inflammable material in their composition We must respect this distance in order to have room to remove the turbulators during maintenance The base on which the boiler rests cannot be made of combustible material carpet wood etc so there must always be adequate protection as the boiler can exceed 60 C plus ambient temperature during operation Figure 6 ...

Page 16: ...oilers come prepared with a connector for connecting an ambient thermostat or a chronothermostat on the back The contact is voltage free and will instruct the boiler to switch on contact closed or off contact open The thermostat must be placed on a wall more than 0 5 m from a window must not receive direct sunlight at any time of day and must not be in draughty areas ...

Page 17: ... litres 193 230 Table 2 Silo capacity with extension Type of fuel Pellet EN 14961 2 A1 diameter 6 mm L 10 30 mm Data may vary depending on the type of pellet used This silo extension kit article CA01010065 consists of a side cover A a silo side B a front C and 16 Din 912 8 8 M4x12 Z B screws D Figure 8 Components of the silo extension kit For its installation you must first open the top cover and ...

Page 18: ...fix the side of the boiler Then open the boiler door to gain access to the screws that secure the front of the unit and remove it you must also loosen the screws on the display Figure 10 Removal of the screws that fix the side of the boiler ...

Page 19: ...screws 4 2x9 5 and the front of the silo Din 912 screws 8 8 M4x12 Figure 11 Removal of the screws from the side and front of the silo You must then apply the silo lateral that is contemplated in the extension kit using the screws that are sent along with the kit Figure 12 Application of the new silo side ...

Page 20: ...16 Put the front of the silo back on and then you should apply the side and front that come with the kit Figure 13 Silo front application Figure 14 Application of the side and front of the equipment ...

Page 21: ...h the application of this kit the width of the boilers both the 16 kW and 24 kW change increases by 125 mm The height and depth remain the same Figure 15 Boiler dimensions with and without silo extension kit ...

Page 22: ... diameter equal to that of the boiler s fume outlet After installation and during periodic inspections it is necessary to monitor emissions For this reason it is necessary to provide measuring points along the chimney they must be self locking and watertight The smoke exhaust pipe can generate condensation in this case it is advisable to establish suitable condensate collection systems 6 1 Install...

Page 23: ...19 Figure 16 Side view of the installation without chimney ...

Page 24: ...20 In the following picture the requirements for the installation of the flue duct are shown Figure 17 Example of flue duct installation A ...

Page 25: ...21 Figure 18 Example of flue duct installation B ...

Page 26: ...ere detailed may prevent the correct operation of the unit Follow all the instructions presented on the diagrams The boilers operate with the combustion chamber in depression which is why it is absolutely necessary that they include a fume exhaust pipe to adequately extract combustion gases ...

Page 27: ...eters Any other type of installation must guarantee a draught of 10 Pa 0 10 mbars measured when hot and at the maximum power Ventilation To ensure the boiler s optimum operation the installation location should be fitted with an air vent with a minimum cross section of 100 cm2 preferably close to the unit s back panel The boiler includes a circular pipe Ø 50mm that may be routed to the exterior of...

Page 28: ...eter which must be at least equal to that of the boiler s smoke outlet Figure 20 Side view of the installation with chimney When atmospheric conditions are so adverse as to cause strong disturbance to the boiler s smoke extraction in particular very strong winds it is advisable not to use the boiler If the equipment is not to be used for a long period the user must check that there is no blockage ...

Page 29: ...irculate through the installation but always maintaining a mixture with hot water from the body which guarantees a return temperature that does not create condensate as the boiler should not operate under conditions of condensation When the temperature of the water in the circuit has reached 55ºC the valve opens fully and all the flow is circulated towards the installation If the boiler loses heat...

Page 30: ... water with an anti corrosion product added non toxic and in the quantity recommended by the manufacturer if there is a risk of freezing in the space where the pellet boiler or fluid pipes are located the installer must add an anti freeze to the circulating fluid in the proportion recommended by the manufacturer in order to prevent freezing at the absolute minimum expected temperature It is very i...

Page 31: ...densation valve so the water cannot circulate in this direction until it reaches the right temperature For this reason use the connection to fill the boiler correctly Bomba Instalação Instalation Pump Válvula 3 vias A Q S 3 way valve D H W Termostato Ambiente Room Thermostat Sonda NTC 10K A Q S D H W NTC 10K Probe Sonda NTC 10K Dep Inércia Buffer Tank NTC 10K Probe ...

Page 32: ...e work and maintenance The room thermostat connection is programmed to make a demand when the contact is closed The Pump and 3 way valve outputs can handle a maximum of 3A The connections are as follows Figure 23 Electrical connection If the installation has a domestic hot water tank and you want the boiler to control it you will need to order an extra probe NTC 10K article CO0304000000001 for thi...

Page 33: ... on the electronic control unit 2 Disconnect the boiler from the mains supply 3 Connect or disconnect the probes which are required 4 Reconnect to the mains 5 The electronic system will give an error Er56 as it will have recognised the changes in the hydraulic installation 6 Clear the error and the system will automatically adapt the operation to the new configuration On the back of the boiler you...

Page 34: ...inadequate combustion process You should always use certified pellets and must not forget to test a sample before buying large bulks The physical chemical properties of the pellets calibre friction density and chemical composition may vary within specific tolerances and according to each manufacturer Please note that this may cause alterations to the feeding process and consequently the need for d...

Page 35: ... air circulation in the room where the installation is to be carried out otherwise the equipment will not work properly For this reason pay attention to whether there are other heating appliances that consume air for their operation e g gas appliances diesel boilers etc and it is not advisable to operate these appliances at the same time The boiler has a manual reset safety thermostat to prevent e...

Page 36: ...es and give access to the main menus The date and time are displayed in the top left corner At the top right the button will show errors if any In the top centre you can see the current temperature of the boiler just below the current state of the boiler and below the temperature we have set as a target for the boiler At the bottom you can see a control bar with 5 buttons The first to turn the boi...

Page 37: ...ral screen that will show the status of the 8 main electrical components of the boiler To return to the main screen press on the screen again and without releasing slide your finger to the right On the screen you can see whether the electrical components that make up the boiler are activated or deactivated From the main screen by clicking on it and sliding your finger without releasing it downward...

Page 38: ...d will run central heating when the chrono and room thermostat requires it The second shows that the fuel being used in this case is always pellets as our boiler only runs on pellets The third shows the power selected which can be between 1 and 5 or automatic The fourth shows the chrono option whether active or reactive 9 2 Viewing and eliminating errors If any error occurs in the operation of the...

Page 39: ... of errors blocking and non blocking When a lock error occurs it will be necessary to click on the lock and without releasing slide your finger to the right The boiler may need some time to recover stable temperatures or functions and allow unlocking When the error is not lockable simply press the X located in the top left corner 9 3 Settings menu If in the home screen you press the second button ...

Page 40: ...d by up to 25 during the start up and power up process The second button HEATING serves to set the boiler temperature set the temperature of the inertia tank and the DHW tank note only applies if the tank probes are connected to the boiler The third button MANUAL LODING button enables you to load pellets manually and continuously for 10 minutes This will be very useful for loading or filling the p...

Page 41: ...nfiguration menu in which you can choose the language and set the date and time important if you want to use the time programming option The second button SYSTEM MENU allows entering the advanced configuration menu and is reserved for the exclusive use of Solzaima authorized technicians For this reason this menu is password protected and is not available to the final consumer The third button DISP...

Page 42: ...stallation The information displayed on this screen will depend on the elements installed inertia tank and DHW tank Above each icon appears the name to which it refers and below the icon the value and the unit of measurement in real time In this way it is possible to see in what state the system is individually 9 6 Chrono menu If you press the fifth button on the bottom bar of the main screen you ...

Page 43: ...y of the week for which you wish to schedule On the right it is possible to select the times at which the boiler should work maximum 3 starts per day You can modify the intervals by clicking on them activating or deactivating the button that changes to green To enable the Chrono mode you must go back to the main screen of the chrono menu double clicking on the arrow drawing in the upper right hand...

Page 44: ... daily weekly or weekend they do not work simultaneously When the chrono is enabled it is possible to verify that it is active on the display on the main screen 10 Processes 10 1 Start up To start the pellet boiler press the start stop button Press the button and without lifting your finger slide it to the right to confirm ...

Page 45: ...he word On should appear on the display 10 2 Stop The stop command is to press the start stop button Press the button and without taking your finger off slide it to the right this is to confirm The display should show switch off The extractor will be active until the set point fume temperature is reached to ensure that all material is burnt 10 3 Turn off the unit You should only switch off the app...

Page 46: ...e the pellet level rising inside the silo through the pellet level window We recommend filling it to the maximum and topping it up when you cannot see the pellets through the level window The boiler has an electronic sensor that will detect when the pellets enter the reserve and will start beeping to alert you to the need to refill the silo If after 60 minutes the silo has not been recharged the e...

Page 47: ...hich may vary greatly depending on the quality of the pellets used Note It is recommended that before any cleaning the boiler should be switched off and sufficiently cooled to avoid accidents 12 1 Removing the ash drawer from the burner Open the right hand door of the boiler to access the inner door The inner door has an opening and closing lever on the left side To open the inner door move this l...

Page 48: ...e inside of the outer door remove the ash drawer from the burner Figure 30 Removing the ash drawer from the burner To do so move the drawer outwards a little so that it is easier to put the lid in its place as shown in the cut image Figure 31 Removing the ash drawer from the burner ...

Page 49: ...f its place See sectional image Figure 32 Removing the ash drawer from the burner Insert the flap from the back towards the end first This way the flap will protect you from the possible heat that the ashes may release Figure 33 Removing the ash drawer from the burner ...

Page 50: ...e ash drawer from the burner Carry out the operations in the opposite way to place the drawer in its working position making sure that it fits snugly against the back wall 12 2 Removing the bottom ash drawer With the doors open as for cleaning the ash drawer of the burner and using the same lid pull the bottom drawer until it is almost out of the appliance about 80 as shown in the following figure...

Page 51: ...deactivation This ensures that both the pan and the burner itself are as clean as possible To clean the pan and burner more thoroughly by hand press the button on the left hand side of the inner door until the pan is in the vertical position After this step you will have access to cleaning the plate and also the inside of the burner Scrape the pan and burner with a barbed steel brush and make sure...

Page 52: ...everything is clean and the drawers are in place simply close the inner door The boiler has a limit switch that detects that the door is closed and automatically brings the burner plate to its working position Figure 38 Cleaning the burner plate ...

Page 53: ...oiler will be dismantled and cleaned and must be cold to avoid unnecessary scratches As with most cleaning this will be done from top to bottom Let s start by removing the cover on the right side of the boiler To remove this cover it will be enough to pull it upwards or with the help of a screwdriver make a small lever inserting it between the cover and the side Once separated from the boiler keep...

Page 54: ...fore loosening them completely to make the operation easier and so that none of the screws are forced too far Figure 40 Removing the top cover After loosening the 4 screws remove the lid from the smoke box by pulling the handle in the centre upwards Put yourself in a comfortable position where you can push hard as the lid is a heavy piece Remove it from the body the lid will have dirt on the botto...

Page 55: ...M6x20 screws that secure the inner shaft to the outer shaft and move it towards the outer shaft Figure 41 Inside the fume box To remove the cleaning spring system move the shaft out of the welded bracket on the housing and pull the system upwards The springs are 1m long so before starting this manoeuvre it is best to climb a ladder that allows you to easily remove the springs without having to ben...

Page 56: ...xing systems detail A Loosen the DIN M10x30mm screws move the fixing system backwards and remove it by turning it upwards Do not remove the screw completely so that it is easier to put it back in later Figure 43 Removing the inner cover Figure 44 Removing the inner cover ...

Page 57: ...clean the inside of the heat exchanger tubes All dirt will fall into the drawers at the bottom of the machine Also clean the burner plate and also the cast iron burner as described in the previous chapter All the dirt will be in the ash drawers you must empty them and put them back Make sure that the stainless steel cone is correctly positioned resting completely on the inner base of the body Fit ...

Page 58: ...cover by matching the spring clips to the protruding pins and force the cover downwards 12 5 Cleaning the glass The glass can only be cleaned when it is completely cold to do so use a suitable product follow its instructions for use and avoid contact between the product and the painted metal parts to avoid causing undesirable oxidation Figure 46 Cleaning the glass ...

Page 59: ...r The error may occur due to problems with the speed control of the smoke extractor Contact your service representative Er09 Low water pressure 0 5 Bar Check and adjust the pressure in the hydraulic circuit If the problem persists contact technical service Er10 High water pressure 2 9 Bar Check and adjust the pressure in the hydraulic circuit If the problem persists contact technical service Er11 ...

Page 60: ...es The message appears during the Check Up phase and indicates that the temperature detected by one or more probes is equal to the minimum or maximum value depending on the probe in question Check that the probes are not open detection of the minimum value of the temperature scale or short circuited detection of the maximum value of the temperature scale Ignition interlock Message that appears whe...

Page 61: ...AL DOOR 14 Maintenance plan and log To ensure the proper operation of the unit maintenance operations must be performed as described in Chapter 12 of this Instruction Manual or in the Maintenance and Cleaning Guide There are specific maintenance tasks that must be performed by authorised technicians only Please contact the person responsible for installing the unit To make sure the warranty remain...

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Page 65: ...s attached from factory to the unit s pellet lid in the Portuguese language Attached to the manual you will find other language versions of the sticker labels Spanish English French and Italian If necessary remove the Portuguese language label and replace it with the label in your country s language ...

Page 66: ...at or another type of control provided that it is voltage free dry contact Note The external control normally comes with a manual Note The external control comes with a manual as standard The thermostat must have a 1 to 2 C hysteresis The parameter for operation of the room thermostat in this hydraulic scheme is A01 04 The first activation must be done manually on the display S1 boiler temperature...

Page 67: ...he room thermostat in this hydraulic scheme is A01 04 The first activation must be done manually on the display put the boiler in standby S1 boiler temperature probe P1 pump incorporated into the boiler P2 3 way motorised valve To connect the S3 domestic hot water probe to the boiler always proceed as follows 1 The boiler must be in the Off position 2 Disconnect the boiler from the mains supply 3 ...

Page 68: ... comes with a manual The thermostat must have a 1 to 2 C hysteresis The parameter for operation of the room thermostat in this hydraulic scheme is A01 03 The first activation has to be done manually on the display S1 boiler temperature probe P1 pump incorporated in the boiler P3 installation pump To connect the S2 probe of the inertia tank to the boiler proceed as follows 1 The boiler must be in t...

Page 69: ... to 2 C hysteresis The parameter for operation of the room thermostat in this hydraulic scheme is A01 03 The first activation has to be done manually on the display S1 boiler temperature probe P1 pump incorporated in the boiler P2 3 way motorised valve P3 installation pump To connect the inertia tank probe S2 to the boiler and S3 domestic hot water to the boiler proceed as follows 1 The boiler mus...

Page 70: ...ite White Purple Purple Blue Blue Brown Blue Red Red Green Green Grey Grey Black White Yellow Yellow White White Green Red Green Green Brown Green White White Black Red Encoder Ventilator Pressure Sensor Grey DHW valve Pump installation Burner cleaning button Motor burner cleaning Pellet Worm Drive Pressure switch TS Boiler TS Silo Resistance Boiler Pump Exchanger cleaning Ventilator Red Black Bro...

Page 71: ...pump with Hybrid 25 70 130mm Circulating pump performance graph Figure 53 Pump performance graph User interface The user interface is designed with a single button one red green LED and four yellow LEDs Figure 54 User interface LED BUTTON ...

Page 72: ...re 55 Performance of the pump Note the pump is configured as standard at full capacity 75 100 Changing the pump configuration Can be chosen between the view of the performance of pump and the view of settings just press the button once If you need to change the pump performance you must press the button for 2 seconds after this action the LEDs start blinking then you must press the button until th...

Page 73: ... alarm see Table 6 if we have several alarms at the same time the yellow LED indicates the alarm with higher priority the priority sequence is defined on table as follows Display Priority Alarm Action LED 1 red LED 5 yellow 1 Rotor is blocked Wait or deblock the shaft 1 LED red LED yellow 4 2 Supply voltage too low Control the supply voltage 1 LED red LED yellow 3 3 Electrical error Control the su...

Page 74: ...70 19 Annexes 19 1 Function flow diagrams Flow chart 1 Normal activation Note The first time you will have to activate it manually by pressing the on off button and also after an error has occurred ...

Page 75: ...71 Flow chart 2 Disconnecting the machine Note only for the water version The circulator is switched off below 40 C water temperature ...

Page 76: ...ficient carbon cycle management Solzaima makes all efforts to learn and to know the national forest park while efficiently responding to energy demands taking permanent care to maintain its biodiversity and natural wealth that are essential for the quality of life on our planet SOLZAIMA is a member of the Portuguese Sociedade Ponto Verde which manages packaging waste from products that the company...

Page 77: ...o take place fuel oxidant and ignition temperature Creosote chemical compound created by combustion This compound is sometimes deposited on the glass and flue of an insert fire Differential switch protects people and property against grounding failures preventing electric shocks and fires Energy efficiency capacity to generate large quantities of heat with the least amount of energy possible causi...

Page 78: ...t the total energy of the fuel used Ignition temperature temperature above which the fuel can enter into combustion Plumb vertically above the installation Power output a manufacturer s recommendation from tests on the equipment with firewood loads within a reasonable operating range This power output range will present different firewood consumptions per hour Rated net heating value heating capac...

Page 79: ...onsumers from now on mentioned as Warranty This document does not affect the legal rights of warranty emerging from the purchase agreement whose purpose is the Product s 2 Product identification on which rests the warranty The activation of the warranty presupposes prior and correct identification of the product object towards Solzaima SA being promoted by providing the Product s packing data indi...

Page 80: ...of the product 3 5 2 Thirty 30 days from the date of its detection in the case of professional use of the Product 3 6 In the pellet range equipment s the commissioning service is required to activate the warranty It must be registered up to 3 months after the date of invoice or 100 hours of work of the product whichever occurs first 3 7 During the Warranty period referred to in paragraph 3 1 and f...

Page 81: ...by means of a cabinet or a properly ventilated protective caseAppliances should not be installed in places that contain chemicals in their atmosphere in saline or high humidity environments as mixing them with air may produce rapid corrosion in the combustion chamber In this type of environment it is especially recommended that the appliance be protected with anti corrosion products for this purpo...

Page 82: ... pipes by galvanic corrosion it is advisable to use dielectric separators in the connection of the equipment to metal pipes whose characteristics of the materials applied to this type of corrosion Product Warranty does not include damages caused by non use of such dielectric separators 3 14 The water or thermofluid used in the heating system hydro stoves boilers central heating stoves among others...

Page 83: ...ses 4 1 Products with more than 2000 operating hours 4 2 Refurbished and resold products 4 3 Maintenance operations Product settings commissioning cleaning elimination of errors or anomalies that are not related to deficiencies of equipment components and replacement of the batteries 4 4 Components in direct contact with fire such as vermiculite supports deflector or protective plates vermiculite ...

Page 84: ...allation use and operation instructions or applications not conforming to the intended use of the Product or from abnormal climatic factors unusual operating conditions overload or maintenance or cleaning performed improperly 4 10 The Products that have been modified or manipulated by people outside the Official Technical Services of the brand and consequently without the explicit authorization of...

Page 85: ...oduced by the quality of the water supply Also excluded from this warranty are air bleeding interventions of the circuit or unblocking of circulating pumps 4 16 The installation of the equipment supplied by Solzaima S A should contemplate the possibility of their easy removal as well as points of access to the mechanical hydraulic and electronic components of the equipment and the installation Whe...

Page 86: ...olzaima S A liability in respect of warranty is limited to that established in the present warranty conditions 7 Cost of Services performed outside the scope of the warranty The interventions carried out outside the scope of the warranty are subject to the application of the current tariff 8 Warranty Services performed out of scope Warranty The interventions carried out outside the scope of the Wa...

Page 87: ...f invoices for services rendered they are not processed in any stipulated period with default interest at the maximum legal rate in force 12 Competent court For the resolution of any dispute arising from the purchase and sale agreement having as object the products covered by the warranty the contracting parties attribute exclusive jurisdiction to the courts of the district of Águeda with express ...

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