Page 1: Table Of Contents
Installation, Operation & Maintenance Instructions 1530°C Chamber Furnaces CDF 15/1b This manual is for the guidance of operators of the above Carbolite Gero products and should be read before the furnace is connected to the electricity supply. ONTENTS Section page Symbols &...
Page 2: Symbols & Warnings
1.0 S & W YMBOLS ARNINGS 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 Warning Symbols DANGER of electrical shock–...
Page 3 Ensure that there is free space around the furnace. Do not obstruct any of the vents in the control section: they are needed to keep the controls cool. Ensure that the furnace is placed in such a way that it can be quickly switched off or disconnected from the electrical supply - see below.
Page 4: Operation
Technical Notes The furnaces covered by this manual have electronically controlled power limits. Do not attempt to calculate the Amps from the Wattage. High break capacity fuses should be used. Avoid fast-blow fuses and magnetic trip circuit breakers - consult Carbolite Gero if in doubt. 3.0 O PERATION Operating Cycle...
Page 5 material of the chamber lining becomes partly conducting at high temperatures, and the electric potential inside the chamber can be at any value between zero and the supply voltage. Unearthed probes can cause serious electric shock. Atmospheres Chamber furnaces are not gas tight, so it should be understood that gas usage may be high, and that the chamber is likely always to contain some air.
Page 6: Maintenance
4.0 M AINTENANCE General Maintenance Preventive rather than reactive maintenance is to be preferred. The type and frequency depends on furnace use: the following are recommended. 4.1.1 Cleaning Soot deposits may form inside the furnace, depending on the process. At appropriate intervals remove these by heating as indicated in section 3.2.
Page 7 Element Ageing Silicon carbide elements gradually increase in resistance with use: a process known as ageing. Their heating power reduces correspondingly. If the furnace does not reach temperature, or is slow, the elements have aged to a high a resistance and it may be necessary to replace them.
Page 8: Repairs & Replacements
5.0 R & R EPAIRS EPLACEMENTS Safety Warning – Disconnection from Supply Always ensure that the furnace is disconnected from the supply before repair work is carried out. Safety Note - Refractory Fibrous Insulation Insulation made from High Temperature Insulation Wool Refractory Ceramic Fibre, (better described as Alumino Silicate Wool) (ASW) This product contains alumino silicate wool products in its thermal insulation.
Page 9 Fuse Replacement Fuses are marked on the circuit diagram (section 7.0) with type codes, e.g. F1, F2. A list of the correct fuses is given in section 8.1. If any fuse has failed, it is advisable for an electrician to check the internal circuits. Replace any failed fuses with the correct type.
Page 10 Gently insert the element into the location hole until it reaches the approximate depth of the front face insulation. (See photo 2) This should require no force at all. Then with a slight twisting action locate the front end of the element in the front face location hole and gently insert element as far as possible.(See photo’s 3 &...
Page 11 New furnace: the diagrams indicate the connections. If you have any problems with this procedure, please contact our service division. A common feature of CDF models is that elements are in series between 200-240 volts. Replacements: make a note of the actual braid and cable connections to the elements. Using the reverse method described above, disconnect the braids or cables and carefully withdraw each element.
Page 12: Fault Analysis
6.0 F AULT NALYSIS A. Furnace Does Not Heat Up  The heating  Check also that the SSR is working The HEAT light element has failed correctly is ON  The controller  The thermocouple has broken or has a The HEAT light wiring fault is OFF...
Page 13: Circuit Diagrams
7.0 C IRCUIT IAGRAMS In all CDF models the safety switch in the diagram is a positive-break door switch. EMC Filters (if fitted): dependent on the model there may be one filter, or more than one fitted in parallel. The circuit diagram example does not show multiple filter arrangements. Single Phase Contactor Filter...
Page 14: Fuses & Power Settings
8.0 F & P USES OWER ETTINGS Fuses F1-F3: Refer to the circuit diagrams. Internal Fitted if supply cable fitted. 16 Amps: supply fuses 38mm x 10mm type F Fitted on-board to some types of EMC filter. Auxiliary Fitted on-board to some types of EMC filter. 2 Amps glass type F circuit fuses On board: 32mm x 6mm...
Page 15: Specifications
9.0 S PECIFICATIONS Carbolite Gero reserves the right to change specifications without notice Models Covered by this Manual MODEL Max. Max. Chamber Size (mm) Approx. Temp. Power Capacity Weight (°C) (kW) (kg) Chamber Furnaces heated by Silicon Carbide elements. CDF 15/1b 1530°C Environment The furnaces contain electrical parts and should be stored and used in indoor conditions as...
Page 16 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.

VERDER Carbolite Gero CDF 15/1b Installation, Operation & Maintenance Instructions Manual

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