Contents This manual is for guidance on the use of the Carbolite Gero product specified on the front cover. This manual should be read thoroughly before unpacking and using the furnace or oven. The model details and serial number are shown on the back of this manual.
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Calibration After-Sales Service Recommended Spare Parts and Spare Parts Kit 7.0 Repairs and Replacements Safety Warning - Disconnection from Power Supply Safety Warning - Refractory Fibre Insulation Temperature Controller Replacement Thermocouple Replacement Solid-State Relay Replacement Fuse Replacement Element Replacement 8.0 Fault Analysis Furnace Does Not Heat Up Product Overheats 9.0 Wiring Diagrams...
1.0 Symbols and Warnings 1.0 Symbols and Warnings Switches and Lights Instrument switch: when the instrument switch is operated the temperature control circuit is energised. Heat light: the adjacent light glows or flashes to indicate that power is being supplied to the elements. General Warnings DANGER –...
2.0 Installation 2.0 Installation Unpacking and Handling Note: throughout this manual the furnace lid is referred to as a "door". When unpacking and handling the product, always lift it by its base. Do not use the door or any other projecting cover or component to support the equipment when moving it. Use two or more people to carry the product where possible.
2.0 Installation Depending on the application of the product, it may be appropriate to position it under an extraction hood. Ensure the extraction hood is switched on during use. Ensure that the product is placed in such a way that it can be quickly switched off or disconnected from the electrical supply.
2.0 Installation Electrical Connections Connection by a qualified electrician is recommended. All models covered by this manual may be ordered for single phase A.C. supply, which may be Live to Neutral non-reversible, Live to Neutral reversible or Live to Live. Check the product rating label before connection.
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2.0 Installation 2- or Black to phase 1 3-phase Black to phase 2 Black to phase 3 (except 2-phase) Light Blue to neutral (except delta) Green/ Yellow to earth (ground)
4.0 2132 Over-Temperature 4.0 2132 Over-Temperature Controller Description (if fitted) Description Alarm Light Page Scroll D Down Display This over-temperature controller is fitted and supplied ready to use by Carbolite Gero. It is a digital instrument with a latching alarm, requiring no additional panel controls. The controller features easy setting of over-temperature setpoint and reading of current temperature by the over-temperature sensor.
4.0 2132 Over-Temperature 4.2.2 Operation When switched on, the controller lights up, goes through a short test routine and then displays the measured temperature or the over-temperature setpoint. The page key allows access to parameter lists within the controller. A single press of the page key displays the temperature units, normally set to °C;...
4.0 2132 Over-Temperature Audible Alarm If an audible alarm is supplied for use with the over-temperature controller, it is normally configured to sound on over-temperature 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.
5.0 Operation 5.0 Operation Operating Cycle This product is fitted with an instrument switch which cuts off power to the control circuit. Connect the product to the electrical supply. Turn on the instrument switch to activate the temperature controllers. The controllers illuminate and go through a short test cycle.
5.0 Operation Materials such as case hardening compounds and other reactive salts may penetrate the furnace chamber lining and attack the wire elements, causing premature failure. Use of Probes Any metal object used to probe into the product chamber while the product is connected to the electrical supply must be earthed.
5.0 Operation Power Adjustment The product control system incorporates electronic power limiting. Depending on the model and the destination country the power limit maybe set to 100% or a lower figure. Where appropriate the power limit parameter OP.Hi is accessible to the operator, but it should not generally be altered.
6.0 Maintenance 6.0 Maintenance General Maintenance Preventive rather than reactive maintenance is recommended. The type and frequency depends on the product use; the following are recommended. Maintenance Schedule CUSTOMER QUALIFIED PERSONNEL DANGER! ELECTRIC SHOCK. Risk of fatal injury. Only electrically qualified personnel should attempt these maintenance procedures.
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6.0 Maintenance Performance Element Circuit Electrical measurement Measure the current drawn on each phase / cir- Power Consumption cuit Hearth Visual check for fit and damage...
6.0 Maintenance 6.2.1 Cleaning Soot deposits may form inside the furnace, depending on the process. At appropriate intervals remove these by heating as indicated in the General Operation Notes. The product's outer surface may be cleaned with a damp cloth. Do not allow water to enter the interior of the case or chamber.
6.0 Maintenance thermocouple and temperature indicator should be made from time to time to determine whether full calibration is required. Carbolite Gero can supply these items. Depending on the controller fitted, the controller instructions may contain calibration instructions. 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’...
7.0 Repairs and Replacements 7.0 Repairs and Replacements Safety Warning - Disconnection from Power Supply Immediately switch the product off in the event of unforeseen circumstances (e.g. large amount of smoke). Allow the product to return to room temperature before inspection. Always ensure that the product is disconnected from the electrical supply before repair work is carried out.
7.0 Repairs and Replacements Thermocouple Replacement The coverings and guards which must be removed to gain access to the thermocouple depend on the model, its orientation (horizontal or vertical), and possibly other options and fittings. It will usually be necessary to separate the product from its base or stand. On horizontal models one outer end-cap will need to be removed and on vertical models the terminal cover.
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7.0 Repairs and Replacements 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.
7.0 Repairs and Replacements Element Replacement See section 7.2 - wearing a face mask is required. The coverings and guards which must be removed to enable replacement of the wound tube element depend on the furnace model, its orientation (horizontal or vertical), and other options and fittings.
8.0 Fault Analysis 8.0 Fault Analysis Furnace Does Not Heat Up The HEAT The heating element Check also that the SSR is working light is ON has failed correctly The controller shows a The HEAT The thermocouple has broken or has very high temperature light is OFF a wiring fault...
8.0 Fault Analysis Product Overheats Product only heats up The controller when the instrument shows a very high The controller is faulty switch is ON temperature The thermocouple may be The controller faulty or may have been shows a low removed out of the heating temperature chamber...
10.0 Fuses and Power Settings 10.0 Fuses and Power Settings 10.1 Fuses F1-F3: Refer to the circuit diagrams. GEC Safeclip of the type shown Fitted if supply cable fitted. Internal (glass type F up to 16 A) Supply Fitted on board to some types 38 mm x 10 mm type F fitted on Fuses of EMC filter.
11.0 Specifications 11.0 Specifications Carbolite Gero reserves the right to change the specification without notice. Chamber Size Approx Capacity (mm) Model Temp Power Weight (°C) (kW) (kg) Vertical chamber furnaces heated by resistance wire embedded in refractory cement slabs. VCF 12/23 1200 11.1 Environment...
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Notes Service Record Engineer Name Date Record of Work...
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The products covered in this manual are only a small part of the wide range of ovens, chamber furnaces and tube furnaces manufactured by Carbolite Gero for laboratory and industrial use. For further details of our standard or custom built products please contact us at the address below, or ask your nearest stockist.
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