Operating Instructions Laboratory Furnaces
Contents
1. The function of the balance is described in more detail in the separate instructions enclosed Separate instructions for MV software option Electrical connection Plug the mains plug in a corresponding recep tacle which is protected sufficiently depending on the rated power of the furnace If the fur nace is ordered delivered without plug a quali fied electrician must connect the furnace Please note Using extension cables and or junction boxes may lead to a reduced furnace output due to the voltage drop in the lines The power is also reduced if the connection line to the junction box is very long so that the fur nace does not reach its nominal temperature Please have the connection checked by an electrician The voltage may not drop below the rated load by more than 10 Entering temperatures and programs Separate instructions for the Controller are en closed for the safety regulator as well if the regulator is provided as option First heating up To dry out the brick lining and to create an oxide protection layer on the resistance wire the furnace must initially be heated up This may cause an unpleasant smell Provide suffi cient ventilation Heat the empty furnace up to 1050 C in 6 hours for LE furnaces heat up to 1000 C without ramp maintain this temperature for one hour then let the furnace cool down by its own The furnace is now ready to operate Operating notes General notes The insulat2. MORE THAN HEAT 30 3000 C Operating Instructions Laboratory Furnaces Model L T 3 L T 40 SKM SW HA LV T 3 LV T 15 LE 2 11 LE 14 11 LA 11 The furnace may only be put into operation when these instructions have been read and completely under Stood by the operator www nabertherm com These operating instructions must be read by every user and must be available at all times Content Installation and commissioning 4 Operating notes 7 Maintenance and fault clearance 8 Troubleshooting rissies nass LE L 3 JHA Laboratory furnace economy series Size Laboratory furnace with recirculating air blower in the back wall JSKM JSW Nominal temperatures L 11 1100 C L 12 1200 C L 13 1300 C Furnace chamber of ceramic muffle Weighing furnace with bogie and balan ce Repair instructions DISDOSAJ es Circuit diagrams Wiring of the heating elements 18 Declaration of Conformity 19 Designated use All laboratory furnaces are designed for com mercial use in laboratories Equipment All models are equipped with a high quality multi layer and energy saving heat insulation LV models have an air preheating system and an air flow rate per minute which is at least six times the chamber volum
3. 3 L T 40 SKM SW HA LV T 3 LV T 15 LE 2 LE 14 LA 11 For all Furnaces With switchgear 110 480V and Nominal frequency of 50 60 Hz Harmonized standards valid EC Directives EN 746 1 Low Voltage Directive EN 60335 EN 61010 1 EMC Directive EN 61000 6 1 EN 61000 6 3 Lilienthal 11 10 2005 Thomas Adamek Wolfgang Bartilla Head of Quality Management Team Leader R amp D 19 MORE THAN HEAT 30 3000 C Reg Nr B 1 21 englisch Oktober 2005 Headquarters No responsibility is accepted for the correctness of this information we reserve the right to make technical alterations Nabertherm GmbH Bahnhofstr 20 28865 Lilienthal Bremen Germany Tel 49 04298 922 0 Fax 129 info nabertherm de www nabertherm com
4. screw to the furnace housing Assemble back wall cover Replacing the fan motor fan wheel only with HA models Switch off the furnace and pull the mains plug Detach back wall cover and remove back wall cover Dismount fibre cover plate of the fan wheel in the furnace chamber To do so pull out the four clamps in the rear corners and remove plate carefully to the front Loosen setscrew on the shaft between furnace back wall and fan motor Fasten fan motor and pull out fan wheel with a rotating movement from the furnace chamber side Pull off cable on the fan motor loosen the three fastening screws and remove motor Assemble in reverse order Disposal Upon delivery the furnace does not contain any ma terial which is to be classified as hazardous waste However process residues may collect in the insu lation during operation These may be dangerous to health and or dangerous to the environment Therefore we recommend to proceed as follows Remove electrical components and dispose of as electrical waste Remove insulation and dispose of as special hazardous waste wear a protective mask P2 protective gloves and a protective suit Dispose of the housing as scrap metal sjapow je JOU 434905 ZZX Aejai Joyonpuodwas GEA youms 90 u03 J00q vvS USHMS SUE IS WH Ajuo uej te Gunejnoutoej vLIN Y2W AOSZ 02xS ajoejda9a1 joasn4 ZZ4 Sluawaja Duneeu ufis sbuleu ajdnodowey Gcg ay jo BuuiM eas aas
5. Ajddns Jamog MORE THAN HEAT 30 3000 C an E E eN u a T S OAL XX Z LAX 1 A AAL XL LK 7 Scd 8 6 EZ V3 ba I i j Oc d OZ18 L T V 3 15 B170 or P320 SW SKM HA and LA with B170 or P320 110 120V 200 240V 1P NPE 2P PE 50 60Hz Circuit diagrams 13 L T V 3 15 B170 or P320 SW SKM HA and LA with B170 or P320 with safety regulator 2132i 110 120V 200 240V 1P NPE 2P PE 50 60Hz slepouw e 10u 1394905 Keja Jojonpuoolweg U91IMS 9E U09 100 U91IMS SUIN vH Ajuo ue ne Gurejnoulosy Jejiwi uoljo8j6s einjeuadwej V W A0S2 02xS 8 9e1d9981 Jo asn4 JoyeinBai Ayayes ajdnooouuau aoeuny ejdnooouuau S dALXX Z LT S CAL XX Z A dAL L LXT A GAL XYL Lea Sza cox SEA vvs IS YLIN cN 4s Led sca x1 11 s S1u ui Duneeu ubis ay 40 unim 99S sGuqeu oes Ajddns Jamod zn 9 L 8 6 oL i a xa i a OCE d OZL aj n x 2 M m EAE y z WY Sga nor S 1 lv ji N n4 ZX n f Ize Lc Uuieujoin3 CN 14 abertherm MORE THAN HEAT 30 3000 C LE 2 4 Controller ITRON 16 110 120V 200 240V 1P
6. m to the furnace sides and 1 m to the top The minimum distance between the furnace sides and non flammable materials can be reduced to 0 2m Provide sufficient room ventilation to carry off exhaust heat and gases which develop during the process Non observance can result in a fire risk and danger to health Mounting the chimney Depending on the application order different chim neys are delivered not included in the scope of supply with a protective gas connection Angled chimney not for LV models Achimney that diverts the gases and fumes es caping from the exhaust air nozzle back wall and lets them escape at the top Cross section 40 x 30 mm Put the chimney on the exhaust air nozzle at the furnace back wall and fasten with the two screws provided Chimney with fan not for LV models Supports ventilation of the gases and fumes from the furnace chamber Cross section 85 x 60 mm Put the chimney on the exhaust air nozzle at the furnace back wall and fasten with the two screws provided Plug the connector in the re ceptacle on the back of the switchgear or in an external receptacle Chimney with fan and catalyst not for LV models Heats up the gases and fumes of the furnace chamber to about 600 C and feeds them through the catalyst honeycomb During this process the organic constituents are almost completely burnt catalytically i e are decom posed in carbon dioxide and water vapour This el
7. 50 800 55 LA 11 485 425 565 27 Outer dimensions Furnace ratings see the type plate on the left hand furnace side Dimensions and weights see table Protection class 1 Enclosure rating of the furnace IP 20 Thermal safety according to EN 605192 2 1993 without safety controller Class 0 in case of error no protection for furnace or material with safety controller Class 2 in case of error furnace and material are protected Ambient conditions Temperature 5 40 C Humidity max 95 96 non conden sing Safety CAUTION Hot surface Risk of burns Check the furnace for perfect condition before starting operation with LE models check es pecially the radiant heaters Stop operation of the furnace immediately in case of a failure If the furnace is operated in an imperfect condition there is danger to life and limb MORE THAN HEAT 30 3000 C The furnace may not be used for heating food and drink for the purpose of consumption When operating the furnace considerable amounts of heat as well as harmful gases and vapours can be released depending on the type of material used These must be led outside in an appropriate manner Non observance can result in a fire risk and danger to health For more information see Assembling an exhaust pipe Operating the furnace with explosive gases or mixtures or with explosive gases or mixtures created in the process is not perm
8. N PE 2P PE 50 60Hz eje1jJojonpuooiUegS GSA NO 19 89H YSUMS EZS youms SURN IS Slueweje Duneeu ubis sGurqeu aas Ajddns Jamog eldnooouuey Gz eui jo unm 888 UN ANI o o 3d INiz1 a Sz 8 A 1 tou KU Tom ze tel LX d NN PNE etree gens Sg T EOS 91 NOU 9 A E L E dO bd v i d v Io4neN esbyd i i U A A U d N N 9 9 jj eee eds came a quesiti o 1 pacis kas 1 a ve vL de aoi Y ees r1 UoZX 15 L 24 40 11 12 with B170 P320 200 400V 3P NPE 3P PE 2P PE 50 60Hz sj pow Ile JOU 194005 ej8J 10 onpuodlwag sj pow Ile JOU JeuuojsueJ 0 3005 U2 IMS 98 U09 J00q YOUMS SUIPW 10 9B U09 Ayayes VZ A0SZ 02xG 91924d 9 1 jo asn4 JoyejnBas Ayayes ejdnooouuau 992euJnj ejdnooouuau S GAL XX Z LAX 1 A GAL XX L LAX 1 Sza cox GEA 961 vvs IS L3 dci Led sza TEX H MOOV AOGE XOLU Sluaweja Bulyeay ay jo Guy ees Lv im AVS E OZE d OZ L a a a ag ubis sues aas Ajddns 19Mog dc AOvz 802 lt d AOVZ 80Z Lx 16 sjapow Ile you 192008 ZX kejau Jojonpuodwes GEA sj pow e JOU jeuuojsueJ J0gu0 oI youms 108 U09 1000 vvS YOUMS SUIE A LS Joena a
9. at a constant rise Ventilation chimney In any case we recommend to connect the fur nace to an exhaust ductwork and to lead the arising gasses out A standard ventilation pipe of metal with NW80 NW 120 can be used It must be laid at a con stant rise and fastened to the wall or ceiling Position the pipe in center above the chimney NW 120 is not required for models with venti lation fan or catalyst Do not mount the ventilation pipe directly to the chimney as otherwise a bypass effect cannot be produced The bypass effect is required to prevent a too high quantity of fresh air being sucked through the furnace Exception LV fur naces with these models the ventilation pipe NW80 can be put directly onto the chimney Caution The exhaust gases can only be carried off if the room is ventilated by a corresponding fresh air opening Mounting the balance only with the SW mes Insert the tube from below into the hole of the furnace floor Place the balance in the frame below the fur nace Lift the tube and set it on the bearing area of the balance To secure the tube push the supporting stamp in between tube and be aring area of the balance while lifting the tube Put the ceramic plate with the guide on the tube and align exactly The tube must be placed fre ely on the balance and must not touch the fur nace insulation so that the measuring result is not affected Connect balance with the mains plug
10. e at temperatures above 500 C All models are equipped with a Controller which provides safety against most operating errors The furnace chamber temperature is measu red and regulated by a long life thermocouple NiCr Ni Tmax lt 1100 C or PtRh Pt Tmax gt 1100 C Furnaces of the LV series are especially desig ned for ashing of laboratory samples Awritten agreement of Nabertherm is required if the furnace is to be used for other applicati ons The installation instructions and safety regu lations must be observed since otherwise the furnace is not regarded as being operated in accordance with the designated use and all claims against Nabertherm become void General description Explanation of the model names L Laboratory furnace with flap door LT Laboratory furnace with lifting door LV Laboratory ashing furnace with hinged door LVT Laboratory ashing furnace with lifting door Technical specifications Model Width Depth Height Weight mm mm mm kg LE 2 11 275 380 330 10 LE 4 11 350 400 400 18 LE 6 11 510 400 320 18 LE 14 11 555 500 370 25 L T V 3 380 370 420 20 L T V 5 440 470 520 35 L T V 9 480 550 570 45 L T V 15 480 650 570 55 L T 24 560 660 650 75 L T 40 600 790 650 95 Outer dimensions Model Width Depth Height Weight mm mm mm kg L9 11 SKM 480 550 570 50 L9 11 SW 480 5
11. ed when the pro gram is started and is switched off automatically at program end and when the furnace chamber temperature has dropped below 80 C The furnace must not be switched off or disconnected from the mains above this temperature Otherwise the air circulating motor might be damaged Maintenance and fault clearance Regularly clean the ventilation holes pipes so that the ventilation cross section remains unobstructed and the suction functions well In the case of commercial use Please observe the safety regulations appli cable to your country According to a regulation of the German employer s liability insurance association the furnace must be checked by a qualified electrician at specified intervals Use the error search list Troubleshooting the repair instructions and the circuit diagram see the following pages to identify and eliminate errors Cracks in the insulation The insulation of the furnace consists of very high quality refractory material As a result of heat expansion cracks appear in the insulation after a few heating cycles However these cracks have no influence on the function or quality of the furnace Troubleshooting MORE THAN HEAT 30 3000 C Error Cause Error elimination Controller does not switch on No voltage or Controller is defective Check replace the fuse s of the connection Check replace the fuse of the Controller if installed Check plug connecti
12. el Production or serial number Year of construction Only use original spare parts from Nabertherm as otherwise all guarantee becomes void Safety instructions not for L 13 This furnace contains ceramic fibre material in the insulation In the Federal Republic of Germany actively handling this fibre e g replacing the insu lation is subject to the regulations of the German ordinance concerning hazardous materials Annex V No 7 Artificial mineral fibres of June 12 1998 In the other territories of the European Commu nity ceramic fibres are classified by the Directive 98 69 EC of the Commission of December 5 1997 as follows CARC Cat 2 R 49 Xi R 38 Working on the fibre insulation must therefore be executed in such a way that the quantity of fibre dusts released is kept at a minimum We recommend to wear a breathing mask P2 or higher protective gloves and a protective suit or having work done by an expert Replacing the heating plates or heating coil except LE models Removal Pull mains plug Remove back wall cover Loosen and remove terminals at the ends of the heating coil Pull off wall ducts at L 3 pull of silicone ho ses first Pull out any fixing clamps from the lining fur nace chamber Take side ceramic support pipes L 5 15 out of the chamber Remove the heating plates or the heating coil L Insertion Clean furnace chamber and wall ducts from re Sidues If cleaning t
13. es ZN Jojoeluoo AjajeS pM V W A0SZ O2XG 8108 d89811088NJ ZH Joqjejn6au Ayayes ejdnooouueu eg sluaweja Durjeau uBis sbuleu 9oeuinj ejdnooouuau zg au 10 Buli eas aas Ajddns Jamod MORE THAN HEAT 30 3000 C MOOV AOSZ XOW a n eave rae nq NE zz i He i H dZ AOvZ 80Z Z Cox N S GAL XX Z Lv 1 S CAL XYZ L X 1 A d L W L LX 1 GAL OY LLC Leg Sca de AOvZ 80 Lx Ize Lc Uureujoin3 ZN L 24 40 11 12 with B170 P320 with safety regulator 2132i 200 400V 3P NPE 3P PE 2P PE 50 60Hz Wiring of the heating elements IPN 3 2 110 120v LI N L2 LI N L2 1 o L E V T 3 15 xx xx LA 11 xx xx 1 N 2P 200 240V uo u N L2 LI N L2 o o L E V 1 S 1 S xx xx LA 1 1 xx xx LT 24 xx xx L T AO xx xx 2P 3P 380 400V L T 24 xx xx L T AO xx xx MORE THAN HEAT 30 3000 C Declaration of Conformity for furnaces with Nabertherm switchgear including Controller EC DECLARATION OF CONFORMITY according to EC Low Voltage Directive No 73 23 EC modified through 93 68 EC and EMC Directive 89 336 EC Nabertherm GmbH Bahnhofstr 20 28865 Lilienthal electrically heated chamber furnaces Models L T
14. f June 12 1998 In the other territories of the European Community ceramic fibres are classified by the Directive 98 69 EC of the Commission of December 5 1997 as fol lows CARC Cat 2 R 49 Xi R 38 Working on the fibre insulation must therefore be executed in such a way that the quantity of fibre dusts released is kept at a minimum We recommend wearing a breathing mask P2 or higher pro tective gloves and a protective suit when wor king on the insulation or having work done by an expert Installation and commissioning HUS por AE Wear protective gloves Atleast two persons or even more depending on the furnace size are required for carrying transporting the furnace Grip under the furnace sides When using belts these must be placed lateral ly crosswise Removing the transport packaging Remove the transport packaging completely also inside the furnace Please inform us immediately of any transport damage or incomplete delivery Note for furnace insulations with lightweight re fractory bricks The bricks used may have small holes or blowholes in some parts which are due to the manufacturing process These holes are normal and a quality characteristic of the light weight refractory brick Keep the packaging for any service case which might occur Installation site Place the furnace on a non flammable support stone metal or similar Keep a safety dis tance from flammable components of 0 5
15. he wall ducts is not possible insert new pipes Insert new heating plates or heating coil push connection ends through the holes Put new fixing clamps in the brick lining do not use the old holes Place a small amount of fibre wool around the connection ends from the outside and insert wall ducts Make the electrical connections with new ter minals Hold terminal bottom with tongs tighten the screw Cut off any excess twisted wire ends If a line must be connected using a cable lug Place cable lug onto the thread of the tightened screw and secure with hexagon nut Hold screw so that it cannot come loose Assemble back wall cover are included in the spare parts delivery Replacing the radiant heater LE mo dels Switch off the furnace and pull the mains plug Remove door by loosening the two fastening screws on the bottom right and left hand side Place the furnace on its front side use a soft support Remove back wall cover Loosen terminals on the heating coils and the thermocouple Pull off ducts from the resistance wires Remove internal back wall cover Take out rear heat insulation boards carefully Pull fibre wool out of the connecting groove between upper and lower location hole on the back side of the collar Remove radiant heaters and insert new ones Make sure that the wire is deeply inserted in the connecting groove and carefully stuff with fibre wool Reinsert heat insulation boards carefully Instal
16. iminates most unpleasant smells e g during waste wax Casting Attention Inorganic substances such as heavy metals halogen silicone and fine particulates even small quantities can destroy the cata lyst Wi MORE THAN HEAT 30 3000 C It must be ensured that the catalyst is in ope ration from the program start up to about 600 C No statement can be made about the re sidual substances that are emitted into the environment They depend to a high degree on the individually employed materials embedded masses and their composition Cross section 120 x 120mm Fasten the U shaped holder with the two screws provided to the furnace back wall put the piece of tube on the exhaust air nozzle of the furnace and screw down the chimney with catalyst on the holder Plug the connector in the receptacle on the back of the switchgear option or in an external receptacle ith LV furnaces These models are delivered with a special ex haust gas tube Fasten the angular tube with the screws provi ded to the inside housing of the furnace then fasten the round tube with the screws provided to the outside housing When the furnace is operated without this tube this will result in a reduced air flow rate which is insufficient for the incineration process Please note Installation of a catalyst or chim ney with fan is not possible with these models Assembling a ventilation pipe Ventilation pipe 80mm assemb led
17. ion consists of high quality refrac tory material which is susceptible to shocks Take care not to knock against the refractory material when charging the furnace to avoid damage In order to achieve an even temperature distri bution the furnace should be charged in sucha way that the products have a certain distance to each other and also to the side walls Naber therm offers shelves etc so that the furnace chamber can be used in a better way If the furnace is charged with a high quantity of products the heating time may prolong consi derably The furnace heating is interrupted when the door is opened and is switched on automati cally after the door was closed not with LE models The heating program must be interrupted when the furnace is charged to protect the operator and the furnace itself In case of inobservance there is danger of an electrical shock Do not open the furnace when it is hot If the furnace must be opened at high temperatu res reduce this time to the minimum possible Wear protective clothing and provide sufficient room ventilation T Make sure that the door is correctly closed Discolourations may occur on the stainless Steel housing especially when the hot furnace is opened these however do not affect the function MORE THAN HEAT 30 3000 C Note for LE models Permanent temperatures above 1050 C lead to a higher wear of the heating elements Regulating the fresh air supp
18. itted Cau tion Danger to life If the furnace is provided with a protective gas connection only non flam mable and non explosive protective gases are permitted Only use materials whose properties are known In case of unexpected procedures inside the furnace e g strong smoke or odour develop ment switch the furnace off immediately and wait until it has cooled down by itself Do not open the door beforehand there is a risk of fire or explosion The furnace housing lid and the door handle handle can get very hot during operation If the furnace is opened at high temperatures even when a great distance is kept there is a risk of burns Wear suitable protective clothing safety goggles Do not bring any flammable material close to the furnace keep a safety distance of 0 5 m to the sides and 1 m to the top Do not place any objects on the furnace as otherwise the carrying off of heat is impeded the furnace is damaged and there is a fire ha zard Do not insert objects into the openings in the furnace casing such as exhaust air holes or cooling slots of the switching system There is a danger of electric shock The models L 11 and L 12 contain ceramic fibre material In the Federal Republic of Germany actively handling this fibre e g replacing the insulation is subject to the re gulations of the German ordinance concerning hazardous materials Annex V No 7 Artificial mineral fibres o
19. l internal back wall press tightly and tigh ten screws Insert wall ducts Make the electrical connections on the heating elements with new terminals Hold terminal bottom with tongs Cut off any excess wire ends Connect thermocouple lines observe correct polarity Assemble back wall cover Place furnace on its feet Mount door are included in the spare parts deliveryi MORE THAN HEAT 30 3000 C Repairing the lining only furnace with brick insulation The following note applies to a furnace insula tion with lightweight refractory bricks The lightweight refractory bricks of your furnace are of very high quality Due to the manufacturing process small holes or blowholes may occur in some parts These however are to be regarded as normal and underline the quality characteristics of the brick If the insulation of the furnace chamber shows serious damage it must be repaired Pull mains plug Remove any remaining dust with vacuum clea ner Fill damaged areas with repair kit Nabertherm service Repair kit must dry for 24 hours before the fur nace is commissioned Replacing the thermocouple Pull mains plug Remove protective cover of the electric termi nals on the back of the furnace Loosen the safety screw of the thermocouple Loosen the cable ends on the thermocouple Remove defective thermocouple insert new one Connect new thermocouple observe correct polarity Attach the thermocouple by means of safety
20. ly The volume of fresh air supplied can be set at the fresh air lever The lever is located on the right hand side of the door with models with hinged door and with models with lifting door at the bottom of the door The position is explai ned by the symbols beside the lever In position e the fresh air opening is openend in position o it is closed Note for use of a catalyst or exhaust air blo wer Switch the fresh air lever in position e as otherwise the exhaust gases cannot be remo ved from the furnace chamber Note for LV models These models are equip ped with an independent fresh air system which cannot be controlled The fresh air is led through holes in the back wall in to the upper heating plate where it is preheated and exits to the front above the furnace chamber When the fresh air lever is in position e not preheated fresh air is supplied Switch the lever in positi on o to preheat the fresh air completely Switch the lever in position o in case of a pro tective gas connection operation Note in case of operation with reduced atmos phere protective gas Reducing atmosphere deoxidation exlusion of oxide has a corrosive effect on the oxide pro tection layer of the resistance wire Therefore the next operation is to be carried out in normal atmosphere with the fresh air lever opened so that the oxide protection layer on the resis tance wires can regenerate Note for HA models The air circulating motor is start
21. on Controller indicates error See Controller instruc tions No heating of the furnace chamber after the pro gram was started or very slow heating or selected final temperatu re is not reached Mistake while entering the program Check heating program see Controller instruc tions Door Safety switch interrupts Check whether the door or lid is closed If yes have switch path of the safety switch checked and if necessary re adjusted by Nabertherm service Fuse s of the connection is are defective Check fuse s of the connection replace if necessary Inform Nabertherm service if the new fuse blows as soon as it is screwed in Heating element is defective A for fractures if no fractures are visible Close the cold furnace Switch on the furnace for about 5 seconds not longer Pull mains plug Open the door By carefully touching the heating elements check the heat at various positions cold heating elements heating circuit defective for repair please see repair instructions No heating power as a result of undervoltage Have checked by Nabertherm service Repair instructions Only a qualified electrician may carry out work on the electrical system This also applies to repair work which is described hereafter Ordering spare parts In writing by phone or via the Internet www nabertherm com State the following information from the type plate Furnace mod
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