Installation, Operation & Maintenance Instructions Annealing Ovens TLD models This manual is for the guidance of operators of the above Carbolite products and should be read before the oven is connected to the electricity supply. CONTENTS Section 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.
TLD SYMBOLS & WARNINGS 1.1 Switches and Lights Supply Light: when the oven is connected to the electrical supply the light in the adjacent switch glows 1.2 Warning Symbols DANGER of electrical shock– read any warning printed by this symbol. DANGER – hot surface. Read any warning printed by this symbol. WARNING: all surfaces of an oven may be hot. DANGER – read any warning printed by this symbol. 1.
TLD 2.0 INSTALLATION 2.1 Unpacking & Handling Lift the unit by its base. Do not use the door or any other projecting cover or component to support the equipment when moving it. Use two people to carry the oven where possible. Remove any packing material from the inner chamber before use. 2.2 Siting & Setting Up Place the oven on a level surface. Ensure that there is free space around the oven. Ensure that any vents in the oven are not obscured.
TLD 3.0 OPERATING INSTRUCTIONS 3.1 Operating Program The program consists of the stages shown in the graph below. The rates of temperature rise, dwell temperature and dwell times are all adjustable by the user. The general format of the program is installed at the manufacturing stage, with initial values as shown in the table below. 3 4 2 5 6 1 7 function 1 Start. 2 Heat at a controlled rate. initial setting program heat up at 480°C/hour to 300°C 3 Dwell for a preset period.
TLD To switch the oven off, set the Instrument switch to O. If the oven is to be left off, isolate it from the electrical supply. 3.3 Overtemperature Control (if fitted) The overtemperature controller should typically be set at 15°C above the top temperature used by the main programmer. If an overtemperature condition occurs, always investigate the possibility that the main control system has failed. An overtemperature condition always cuts off power to the heating elements.
TLD 4.0 MAINTENANCE 4.1 General Maintenance No routine maintenance is required other than the occasional replacement of consumable items. The oven outer surface may be cleaned with a damp cloth. Do not allow water to enter the interior of the case. Do not clean with organic solvents. The fan motors are sealed for life; no lubrication is required. 4.2 Calibration After prolonged use the controller and/or thermocouple could require recalibration.
TLD 5.0 REPAIRS & REPLACEMENTS 5.1 Safety Warning – Disconnection from Supply Always ensure that the oven is disconnected from the supply before repair work is carried out. 5.2 Safety Warning - Refractory Fibrous Insulation This oven contains refractory fibres in its thermal insulation. These materials may be in the form of fibre blanket or felt, vacuum formed board or shapes, mineral wool slab or loose fill fibre.
TLD 5.6 Thermocouple Replacement Remove the front panel and the internal cover as necessary. Make a note of the thermocouple connections, and how the thermocouple is placed and fixed. Colour codings are: negative positive (type K) white green Disconnect the thermocouple from its controller terminals or terminal block. Re-assemble with the new thermocouple observing the colour coding. 5.7 Element Replacement Remove front panel and the internal cover as necessary and locate the element terminals.
TLD 6.0 FAULT ANALYSIS A. Oven Does Not Heat Up 1. 2. The SUPPLY light is OFF The SUPPLY light is ON Æ No power from the supply Æ The controller shows a very high temperature or a code such as S.br Æ The controller shows a low temperature Æ There are no lights glowing on the controller B. Oven Overheats 1. Oven only heats up when the instrument switch is ON 2.
TLD 7.0 CIRCUIT DIAGRAMS 7.1 Single Phase N L only if overtemperature control fitted F1 Filter PE Supply light Instrument Switch relay or contactor F2 e l e m e n t (s) circulation fan coil overtemp.
TLD 8.0 FUSES & POWER SETTINGS 8.1 Fuses F1-F2: Refer to the circuit diagrams. 8.2 F1 Internal supply fuses Fitted if supply cable fitted. Fitted on board to some types of EMC filter. F2 Auxiliary circuit fuses Fitted on board to some types of EMC filter. May be omitted up to 25Amp/phase supply rating. Customer fuses Required if no supply cable fitted. Recommended if cable fitted.
Thank you for reading this data sheet. For pricing or for further information, please contact us at our UK Office, using the details below. UK Office Keison Products, P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England. Tel: +44 (0)1245 600560 Fax: +44 (0)1245 808399 Email: sales@keison.co.uk Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
