Operation Manual
Contents
1. spaces between the walls and the load a A x 0 1 b B x 0 1 c Cx 0 1 Working volume space V A 2a x B 2b x C 2c Close the door of the electric furnace Turn on the switch the switching on will be indicated by the pilot lamp that lights up Following the User Manual of the temperature controller set the necessary program and switch its execution on The speed of air flow can be adjusted according to the demand 0 means natural convection in the chamber the fan does not work 10 means forced convection the fan works at max revolutions Increase of the revolutions of the fan 0 10 Fan controller Decrease of the revolutions of the fan 10 0 While decreasing the revolutions of the fan the temperature distribution in the chamber worsens The air change in the chamber can be adjusted according to the process in the furnace Ma The fan valve is fully closed The ambient air does not get into the chamber fe The fan valve is fully open The ambient air gets into the chamber In the technical characteristics the change of air times per hour in the chamber is stated when the fan works at maximal revolutions and the fan valve is fully open If the valve of the change of air is open the temperature distribution in the furnace worsens After work switch off the furnace The switching off will be indicated by the pilot lamp that fades When program ends the bell sounds W2. This symbol indicates important safety requirements disregard of which may cause risk to personal safety and or to property Before switching on the low temperature furnace it is very important to read and follow all the instructions of this manual must be followed with great care in order to ensure the correct sequence of operations and prevent damage to the furnace and danger Atenton to operators This symbol indicates important information 3 COMPLEMENT i This symbol indicates the articles of the manual requirements which The user is supplied with Name FD 420 300 Electrical furnace eo Hooo Shelves pos E e User manual of temperature controller 4 SAFETY REGULATIONS Use the electric furnace according to the requirements of Users technical safety operation rules of electric equipment The operator working with the electric furnace must be aware of the operation rules of electric equipment up to 1000V is acquainted with safety regulations for operation of electric furnace and is aware of the structure operation principle assembly and operation rules of the product Connect the electric furnace to the mains power supply that must have the grounding contact connected to the grounding circuit MN It is prohibited to operate the electric furnace if the grounding is insecure A It is prohibited to operate the electric furnace if any of external protective shields is removed If the electric
3. by the user Any work that can affect the safety of the furnace must be forbidden The existing rules of general safety and prevention of accidents should be applied Only technically orderly furnace must be operated If these instructions are not observed the user is responsible for any negative consequences The manufacturer s advice can not cover all issues therefore the user is responsible for the heating impact on materials and their reaction as well as for the risk related with tests Our advice will help to avoid possible dangers for people the furnace and materials tested 5 COMPOSITION AND TECHNICAL CHARACTERISTICS OF THE LABORATORY ELECTRIC FURNACE 5 1 Composition of the low temperature laboratory electric furnace Y o a F r i MELLEL ee Ce AN ES j EL OEA AAA 20 16 45 1 Door 9 Fanaperure 17 Shelf S overheating Control knob of the fan 19 valve evolution control of the Power supply cord 21 Fan Seal profile 8 Frame 16 Chamber 5 2 Technical characteristics Measure FD 420 300 Number of phases o S Ambience in the chamber Air Limits of automatic temperature C T 10 300 control Temperature distribution 100 C 200 C 300 C Heating time from min 5 C to not more than Dimensions of the chamber not less than standard max shelf Overall dimensions
4. distance of 1 10 for example if the length of the wall is 380 mm the thermocouple has to be not closer than 38 mm from the wall from each wall and one thermocouple has to be put in the centre of the chamber For fixing of thermocouples we recommend to make a welded frame The results are estimated according to the formula The estimation of the temperature distribution in the working space maximum testing temperature from one point minus minimal temperature from another point divided by two The temperature distribution must be not higher than 2 0 C All instruments and thermocouples used for testing must be assessed metrologically tested and be of not lower than the first class of accuracy 16 ELECTRIC DIAGRAMME FD 420 300 390 Y AC 3U N PE 6 2kW 420 300 gt ae cid S I F a 2 b 572 e N b mn H o 2A ag KM 2 1 5mm Cu Ou MO See Sea N M1 M2 N 420 300R1 VR 4 2 3 4 b 7 soul P E UR L1 L2 L3 4 HolN 145 2 230V A1 1111 41A 6 ei E A2 12 2 18 5 a T T2 T3 sp e 154 13 m Mm 6 5 V 2 J XL wo TC 5 2 SG q M1 aN RD pai 2 1137 KM 2 A c 3 LA 14 d Buzzer gt a 7 c e9 7 9 El gt E2 gt E3 gt d 108 10 4 1 ESCK T E53 Q4HR4 2 ESCN Q2 3 3208 CP VH L 3216 CC VH L 2 Option Overheat protection Option PC 3 Option Timer 1 6 2 kW ese lt p i or OOO O AAA EEE c remo gt rr HR Tempera
5. Laboratory Equipment Manufacturer www mrclab com CE E Net a THE INTERNATIONAL CERTE THE STANDARDS INSTITUTION OF ISRAEL LOW TEMPERATURE LABORATORY ELECTRIC FURNACE FD 420 300 CE Operation Manual The product conforms to the requirements of the European Union Low Voltage Directive 2006 95 EC Electromagnetic Compatibility Directive 2004 108 EC and Machinery Safety Directive 2006 42 EC PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION 3 Hagavish st Israel 58817 Tel 972 3 5595252 Fax 972 35594529 mrc mrclab com MRC VER 01 8 12 1 PURPOSE Low temperature laboratory electric furnace FD 420 300 is designed for heating or drying materials and stocks in the ambient air temperatures from T 10 C to 300 C in static conditions 2 EXPLANATION OF SYMBOLS AND MARKINGS alternating current grounding contact Explanation of markings danger of electrical shock l control of the fan valve Position of the label of the product and explanation odel 60 300 LFN IP20 No 000000 4 220 V 50 Hz ULL f 10 2008 Identification on the label Model FD 60 300 Type of furnace 60 total chamber volume 60 dm 300 nominal temperature 300 C Degrees of protection provided by enclosures EN60529 No 0000000 Number of the product 220V Voltage of power supply 220 V Mark of compatibility to CE Explanation of symbols
6. e controller is To switch on temperature not switched on controller Damaged heating element Change heating element Damaged thyristor rela Change thyristor rela Heating time is longer Low voltage of the power To check the voltage of than determined supply power supply To regulate tightness of Door s close is not hermetic door s close There is no exact Temperature s regulator is To switch on automatic automatic temperature Mot regularized selection of parameter AT look to regulation temp regulation instruction for users If after switching on the protective device it triggers again the furnace must not be operated In that case the manufacturer or the manufacturer s representative should be addressed for the repairs of the furnace 15 ASSESSMENT TECHNIQUE OF THE PARAMETERS OF THE LABORATORY ELECTRIC FURNACE Assessment is performed when the fan works at maximum revolutions and the valve of the fan is closed Parameter is given after temperature AT controller has been chosen see instrukcion manual temperature controller The parameters that are tested 1 Testing of the nominal temperature and temperature stability without load when the low temperature laboratory electric furnace is heated to the nominal temperature 2 Temperature distribution in the working space without load when the low temperature laboratory electric furnace is heated to the nominal temperature TESTING METHODS All tests are performed when
7. exceed the nominal temperature otherwise the service life of heating elements is shortened and the thermocouple might be damaged 7 ASSEMBLY Unpack the electric furnace and place it in the location prepared for its operation Unscrew the supports and remove the transportation plates Fix the supports With the help of supports adjust the position of the furnace Put in the shelves Connect the plug of the power supply cord to the mains power supply socket with the grounding contact connected to the grounding circuit The voltage specified in the table of technical parameters should be in conformity with nominal voltage of the mains power supply 8 PREPARATION FOR OPERATION Before the first operation or if the electric furnace has not been in use for a long period of time and stored in humid conditions it should be dried as follows without load heat it up to the temperature of 100 150 C and maintain it for 2 3 hours heat it up to the nominal temperature Maintain for 1 2 hours The dried furnace can be operated While drying some smoke may appear but it has no effect on further operation of the electric furnace 9 ORDER OF OPERATION Open the doors of the electric furnace Put the load on the shelves leaving the spaces from the walls of 1 10 of the side for the better circulation of air The data indicated in technical characteristics were obtained in the working space A B C dimensions of the chamber a b c
8. furnace is operated for a longer period of time the external surfaces A and the door may get hot When opening the door of the hot electric furnace as well as loading unloading it or when touching hot external surfaces it is necessary to wear gloves A Combustible or explosive materials or materials that can become combustible or cause explosion during thermal treatment must not be loaded into the low Attention temperature furnace A N Do not load the furnace with unknown materials Attention A The gas emitted during thermal treatment has to be directed outside through a ventiduct according to the rules of existing requirements A The room where the furnace is operated must have appropriate ventilation MN It is forbidden to work in closed not ventilated room ventilation 1 The room where several furnaces are operated must have special means of In the event of obvious violations the work with the furnace must be immediately stopped Maintenance can be performed by our service operator our authorized specialist or a user who strictly follows our written maintenance instructions In the event the normal operation of the furnace breaks down disconnect it from the power supply the mains and take measures to eliminate the defects It is forbidden to use the furnace for any other purposes The manufacturer is not responsible for damages arising from the use of the furnace not according to its purpose the responsibility is carried
9. ith thermocontroller ESCKT the bell is switched off with button on the control panel 10 MAINTENANCE A The electric furnace should be disconnected from the mains power supply and cooled Attention Control of door tightness gt gt J A A SA No J OOO E VE A Press the holder of the fuse turn anticlockwise and take out from the socket Change a burnt out fuse Screw in the holder of the fuse in the reverse order Once a year Once a year measure the insulation resistance between the frame and heating elements Dry up the electric furnace Connect the megohmmeter to the leads of heating element and frame The reading of the megohmmeter should not be less than 0 5 MQ Once in six Once per six months examine visually the wires and electrical connections months If necessary tighten the contact screws Cleaning When the operation is over clean the external surfaces of the electric furnace except the marking with a piece of cloth soaked in water Clean out the scale from the heating chamber with a piece of cloth soaked in water Cleaning of Clean the fan apertures by the means of a vacuum cleaner the fan apertures 11 STORAGE Store the electric furnace in 1ts packing in heated and naturally ventilated room at the ambient temperature from 5 to 35 C atmosphere with sulphurous gas concentration
10. not exceeding 0 13 mg m and chlorine salts concentration not exceeding 0 3 mg m per 24 hours the ambient relative air humidity not exceeding 80 at the temperature of 25 C While loading and unloading the furnace protect it from any shocks 12 TRANSPORTATION The electric furnace has to be transported only in closed transport at temperatures from 50 to 50 C at the temperature of 25 C the ambient relative air humidity must not exceed 80 You can transport the electric furnace by any means of closed transport except the sea transport but protect it from any movement and rough mechanical damages The packaging does not protect the electric furnace from the effects of improper treatment 13 WARRANTY The manufacturer guarantees that the electric furnace meets the requirements of the company standards The guaranteed operating period is 12 months from the date of purchase of the furnace provided that the user follows the rules of storage and transportation and operation instructions but not more than 24 months from the date of the manufacture of the furnace The defects that appear during the warranty period through the manufacturer s fault shall be eliminated at manufacturer s expense 14 THE MORE OCCURRED FAILURES AND REMOVAL METHODS Removal method The oven can t turn on There is no rated power To check the power supply supply voltage The fuse is burnt out To change the fuse The oven can t heat The temperatur
11. of the furnace not more Depth than Temperature fluctuations at steady mode without load The value of the parameter is given after temperature AT controller has been chosen see instruction manual temperature controller Temperature control limits from the temperature T 10 C to 300 C T the ambient temperature of the room where the furnace is operated Temperature distribution in the working space with forced convection when revolutions of engine are 100 the fan revolution controller shows 10 at indicated temperatures 6 PECULIARITIES OF OPERATION Electric furnace has to be operated in a closed ventilated room following these requirements the base under the bottom of the electric furnace has to be horizontal the allowed unevenness in the length of Im is 1mm hard made of incombustible material height above sea level up to 2000 m ambient temperature from 5 to 40 C ambient relative air humidity should not exceed 80 at the temperature of 31 C and should not exceed 50 at the temperature of 40 C the voltage fluctuation in the mains power supply should not exceed 10 of the nominal value the environment is not dangerous with respect to explosion it does not contain a large amount of electrically conductive dust water vapour aggressive gas recommended to be placed under the exhaust ventilation cap the electric furnace should not be affected by vibration and shocks it is prohibited to
12. the low temperature laboratory electric furnace is heated to the nominal temperature and works in the mode of steady temperature i e when the temperature of the furnace corresponds to the nominal temperature and temperature fluctuations reach minimal values e g 300 1 C 1 The testing of the nominal temperature and temperature stability without load when the low temperature laboratory electric furnace is heated to the nominal temperature is performed as following In the cold furnace the pilot thermocouple is fixed as closely as possible to the working thermocouple The time period of the testing of the nominal temperature and temperature stability is 1 hour The readings of the control device have to be registered for example every 10 minutes The estimation of the nominal temperature The sum of all registered temperature values is divided by the number of records made The result must be from 299 C to 301 C The temperature stability is estimated at the same time If during the temperature testing the result is positive that means that the temperature stability conforms to the requirement 300 1 C 2 The testing of the temperature distribution in the working space without load when the low temperature laboratory electric furnace is heated to the nominal temperature is performed with the help of pilot thermocouples and the device showing temperature No fewer than five thermocouples should be used Thermocouples have to be arranged at the
13. ture controle O ESO CESONSROR 3210 Omron Eurotherm RA tete tay O O oao Oo mi a es a A E IO O sro matas O kra maoz gS meva anto as Option HA ms igo GRASSLIN opto E 17 OVEN TESTING RECORD The laboratory model FD 420 300 was tested and correspond company standards requirements Serial No Produced Control department seal and signature Code of the product Attention In the line of continuous improvement insignificant design amendments may be introduced without notice in this publication
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