VERDER CARBOLITE GERO MTF 12/38/250 Installation, Operation And Maintenance Instructions Download Page 23 | Manualshive

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If any fuse has failed, it is advisable for an electrician to check the internal circuits.

Replace any failed fuses with the correct type. For safety reasons do not fit larger
capacity fuses without first consulting Carbolite Gero.

The fuses are located at the cable entry point. Remove the back panel or control box
back panel to gain access to the fuses.

23

7.0 Repairs and Replacements

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Summary of Contents for CARBOLITE GERO MTF 12/38/250

Page 1: ...Installation Operation and Maintenance Instructions 1200 C Small Tube Furnace MTF Model 250 400 850mm No Controller MTF 12 38 250 400 850 No Controller MEN MTF1238 005_NOCTRL 10 01 2019 ...

Page 2: ...3 Tube Fittings 8 2 4 Electrical Connections 9 3 0 Temperature Controller 11 4 0 2132 Over Temperature Controller Description if fitted 12 4 1 Description 12 4 2 Operation 12 4 2 1 Controls 12 4 2 2 Operation 13 4 2 3 Over Temperature Operation 13 4 2 4 Over Temperature Alarm 13 4 2 5 Resetting the Over Temperature Alarm 13 4 2 6 Sensor Break 13 4 3 Audible Alarm 14 4 4 Navigation Diagram 14 5 0 O...

Page 3: ...nsulation 21 7 3 Temperature Controller Replacement 21 7 4 Solid State Relay Replacement 22 7 5 Thermocouple Replacement 22 7 6 Fuse Replacement 22 7 7 Element Replacement 24 8 0 Fault Analysis 25 A Furnace Does Not Heat Up 25 B Product Overheats 26 9 0 Wiring Diagrams 27 9 1 WA 11 30 27 10 0 Fuses and Power Settings 28 10 1 Fuses 28 10 2 Power Settings 28 11 0 Specifications 29 11 1 Environment 2...

Page 4: ...d to the elements Heat switch the switch disconnects power to the heating elements unless this switch is OFF there is a danger of electric shock when inserting objects into the product 1 2 General Warnings DANGER Electric shock Read any warning printed next to this symbol WARNING Risk of fatal injury DANGER Hot surface Read any warning printed next to this symbol WARNING All surfaces of a product ...

Page 5: ...Caution Double Pole Neutral Fusing 5 1 0 Symbols and Warnings ...

Page 6: ...of heat and on a non flammable surface that is resistant to accidental spillage or hot materials The surface on which the equipment is mounted should be stable and not subject to movement or vibrations The height of the mounting surface is important to avoid operator strain when loading and unloading samples Unless otherwise stated elsewhere in this manual ensure that there is at least 150 mm of f...

Page 7: ...so that this clip is at the bottom In models with one thermocouple the thermocouple should be near the top rather than the bottom If the product is supplied with a separate work tube or any accessories fit these into position Under no circumstances should any objects be placed on top of the product Always ensure that any vents on the top of the product are clear of any obstruction Always ensure al...

Page 8: ...d they are to be fitted as shown in fig 3 the stem of any insulating plug should touch the seal For vertical models with stainless steel seals a hook and eye arrangement holds the upper insulating plug assembly Horizontal models if heavy fittings are to be clamped to the end of an extended work tube they can increase the bending stress at the centre of the tube Support such fittings in such a way ...

Page 9: ...rneath clamp F Tube Fig 3 Twin Clamp End Seal For assembly details refer to the separate work tube end seal manual 2 4 Electrical Connections Connection by a qualified electrician is recommended This product requires a single phase A C supply with earth ground which may be Live to Neutral non reversible polarised Live to Neutral reversible non polarised or Live to Live 9 2 0 Installation ...

Page 10: ... a factory fitted supply cable require a permanent connection to a fused and isolated supply The product s electrical access panel should be temporarily removed and connections made to the internal terminals If the product is to be connected by line plug The plug should be within reach of the operator and should be easy to remove When connecting the product to an isolating switch ensure that both ...

Page 11: ...3 0 Temperature Controller If this product is fitted with a temperature controller instructions are provided separately 11 3 0 Temperature Controller ...

Page 12: ...strument switch which cuts off power to the controller and other parts of the control circuit To operate the controller power must be supplied to the product and the instrument switch must be on If a time switch is included in the product circuit this must be in the ON position When an over temperature condition occurs the controller cuts the power to a contactor which in turn cuts power to the he...

Page 13: ...perature set at 15 C above the furnace or oven maximum working temperature Press scroll twice view the present temperature as measured by the over temperature controller Press it twice the first press shows the temperature units C 4 2 4 Over Temperature Alarm If an over temperature condition occurs the OP2 indicator flashes and an alarm message 2FSH also flashes alternating with the setpoint Power...

Page 14: ...erature condition and to stop sounding when the alarm is acknowledged as given in section 4 2 Note the alarm may sound during controller start up 4 4 Navigation Diagram HL Home List Page Key Black Progress OTSP Over Temperature Setpoint Scroll Key Dashed Through to other options AL Access List For factory access to list and parameters not available to the operator 14 ...

Page 15: ...tructions Over Temperature option only If the over temperature circuit has tripped an indicator on the over temperature controller flashes and the heating elements are isolated Find and correct the cause before resetting the over temperature controller according to the instructions supplied To switch off power to the heating elements use the heater switch To switch the product off use both the hea...

Page 16: ...erature differences do not arise Poor thermal contact should be encouraged between the work piece and the tube crucibles or boats should be of low thermal mass and should have feet to reduce the contact with the tube fig 4 Key A Tube B Crucible Fig 4 Avoidance of thermal contact Do not set too high a heating or cooling rate 5 5 Power Adjustment The product control system incorporates electronic po...

Page 17: ...ns for how to change the power limit 5 6 Running at Low Temperatures The power limit may be adjusted to a low level in order to achieve better control when operating the product at a low temperature Before changing the power limit record the default settings for possible future use Refer to the Power Settings section of this manual for default power limits If the product fails to reach the desired...

Page 18: ...ure Safety Circuit if fitted Electrical measurement Safety Switch Function split models only Set a safe temperature above ambient and open the furnace to see if the heater light goes out Safety Switch Function split models only Electrical measurement Electrical Safety external Visual check of external cables and plugs Electrical Safety internal Physically check all connections and clean ing of the...

Page 19: ...ck all seals and O rings and clamps Performance Element Circuit Electrical measurement Power Consumption Measure the current drawn on each phase circuit Cooling Fans if fitted Check whether the cooling fans are work ing 19 6 0 Maintenance ...

Page 20: ...ion instructions 6 4 After Sales Service Carbolite Gero Service has a team of Service Engineers who can offer repair calibration and preventive maintenance of furnace and oven products both at the Carbolite Gero factory and at customers premises throughout the world A telephone call or email often enables a fault to be diagnosed and the necessary parts to be despatched In all correspondence please...

Page 21: ...ered during maintenance or repair Whilst there is no evidence of any long term health hazards it is strongly recommended that safety precautions are taken whenever the materials are handled Exposure to fibre dust may cause respiratory disease When handling the material always use approved respiratory protection equipment RPE eg FFP3 eye protection gloves and long sleeved clothing Avoid breaking up...

Page 22: ...dy must be removed from the control base and the end cap and insulation ring removed from one end Disconnect the product from the power supply Remove terminal cover to gain access to the thermocouple connections Make a note of the thermocouple connections Thermocouple cable colour codings are thermocouple leg colour positive type K green negative white Disconnect the thermocouple from its terminal...

Page 23: ...eplace any failed fuses with the correct type For safety reasons do not fit larger capacity fuses without first consulting Carbolite Gero The fuses are located at the cable entry point Remove the back panel or control box back panel to gain access to the fuses 23 7 0 Repairs and Replacements ...

Page 24: ...om one end the thermocouple end in the case of MTF10 models Use a sharp knife to cut right through the insulation down to the wire wound tube element along the whole length of the body but do not cut either of the ceramic board end discs The knife cut must be in line with the element lead wires Slide the element gently out through the end of the product body Check the cylindrical case and clean ou...

Page 25: ...The door switch es if fitted may be faulty or need adjustment The contactor relay if fitted may be faulty The heater switch if fitted may be faulty or need adjustment The SSR could be failing to switch on due to internal failure faulty logic wiring from the controller or faulty controller There are no lights glowing on the controller Check the supply fuses and any fuses in the furnace control comp...

Page 26: ...aulty The controller shows a low temperature The thermocouple may be faulty or may have been removed out of the heating chamber The thermocouple may be connected the wrong way around The controller may be faulty 2 Product heats up when the instrument switch is OFF The SSR has failed ON Check for an accidental wiring fault that could have overloaded the SSR 26 ...

Page 27: ...ey F1 F2 F3 Fuses FIL Filter R1 1 R1 2 Relay Contactor R1 Relay C Temperature Controller TC Control Thermocouple SSR Solid State Relay SSW Safety Switch H Heat Lamp EL Element s SW Instrument Switch es N Neutral L Live PE Earth Cables BU Blue R Red GR Y Green Yellow G Grey P Pink 27 9 0 Wiring Diagrams ...

Page 28: ...be omitted up to 25 Amp phase supply rating 2 Amps glass type F 32 mm x 6 mm Customer Fuses Required if no supply cable fitted Recommended if cable fitted See rating label for current See table below for fuse rating Model Phases Volts Supply Fuse Rating MTF 12 38 250 1 phase 110 120 V 10 A MTF 12 38 250 1 phase 220 240 V 4 A MTF 12 38 400 1 phase 110 120 V 16 A MTF 12 38 400 1 phase 220 240 V 10 A...

Page 29: ...MTF 12 38 250 1200 1 0 38 300 250 15 MTF 12 38 400 1200 1 5 38 450 400 17 MTF 12 38 850 1200 2 8 38 900 850 24 Note Weights are approximate for horizontal models and do not include fittings or vertical stands 11 1 Environment The models listed in this manual contains electrical parts and should be stored and used in indoor conditions as follows Temperature 5 C 40 C Relative humidity Maximum 80 up ...

Page 30: ......

Page 31: ...Notes Service Record Engineer Name Date Record of Work ...

Page 32: ... us at the address below or ask your nearest stockist For preventive maintenance repair and calibration of all furnace and oven products please contact Carbolite Gero Service Telephone 44 0 1433 624242 Fax 44 0 1433 624243 Email ServiceUK carbolite gero com Carbolite Gero Ltd Parsons Lane Hope Hope Valley S33 6RB England Telephone 44 0 1433 620011 Fax 44 0 1433 621198 Email Info carbolite gero com...

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