Table of Contents
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Installation, Operation &
Maintenance Instructions
This manual is for the guidance of operators of the above products and should
be read before the furnace is connected to the electricity supply.
Section
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
Manuals are supplied separately for the furnace controller
(and overtemperature controller when fitted).
Please read the controller manuals before operating the furnace.
1100°C Chamber Furnaces
EF 11/8 & AF 11/6
(B models)
C
ONTENTS
page
2
3
5
6
8
11
12
13
16
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Table of Contents
Related Manuals for Bibby Sterilin Lenton EF 11/8
Summary of Contents for Bibby Sterilin Lenton EF 11/8
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Page 1: Table Of Contents
Installation, Operation & Maintenance Instructions 1100°C Chamber Furnaces EF 11/8 & AF 11/6 (B models) This manual is for the guidance of operators of the above products and should be read before the furnace is connected to the electricity supply. ONTENTS Section page... -
Page 2: Introduction
EF, AF 1.0 I NTRODUCTION Models Covered by this Manual This manual covers current models EF and AF. Please note that changes were made to the range from late 2001; these changes affect both the case and the internal design. Models made after the change are suffixed with the letter B on the rating label. -
Page 3: Installation
EF, AF 2.0 I NSTALLATION Unpacking & Handling When unpacking or handling the furnace always lift it by its base. Never lift it by the door. Use two people to unpack and carry the furnace. Remove any packing material from the door gear and furnace chamber before use. Siting &... - Page 4 EF, AF Electrical Connections Connection by a qualified electrician is recommended. The furnace 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. Check the following before connection, by reference to the furnace rating label. Voltage: the voltage on the label and the actual supply voltage should be compatible –...
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Page 5: Operation
EF, AF 3.0 O PERATION The instructions for operating the temperature controller are given in a separate manual. If the furnace is fitted with a time switch, see also the supplementary manual provided. Operating Cycle The furnace is fitted with a combined Supply light and Instrument switch. The light is on whenever the furnace is connected to the supply. - Page 6 EF, AF Atmospheres When an optional gas inlet is fitted there is a label near the inlet saying "INERT GAS ONLY". In practice inert or oxidising gases may be used, but not combustible or toxic gases. 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.
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Page 7: Maintenance
EF, AF 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 8: Repairs & Replacements
EF, AF 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 Warning - Refractory Fibrous Insulation This furnace 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. - Page 9 EF, AF Replace any failed fuses with the correct type. For safety reasons do not fit larger capacity fuses without first consulting Lenton. Access is by removal of the control panel. Thermocouple Replacement Models EF and AF use the same type of thermocouple. Disconnect the furnace from the supply, and remove the back panel.
- Page 10 EF, AF Switch the furnace ON and heat to 900° without interruption, then soak for 1 hour. Some smoke may be observed during this process, which should be carried out in a well ventilated area. Check that the furnace is controlling properly to rule out the possibility that the previous element failed because of a fault in the control circuit.
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Page 11: Fault Analysis
EF, AF 6.0 F AULT NALYSIS A. Furnace Does Not Heat Up à The heating à Check also that the SSR is working The HEAT light is ON element has failed correctly à The thermocouple has broken or has a The HEAT light The controller wiring fault... -
Page 12: Circuit Diagram
EF, AF 7.0 C IRCUIT IAGRAM EF & AF models 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. NOTE –... -
Page 13: Fuses & Power Control
EF, AF 8.0 F & P USES OWER ONTROL Fuses F1-F3: Refer to the circuit diagram. Internal Fitted if supply cable fitted. on-board and up to 16 Amps: supply fuses 32mm x 6mm type F Fitted on-board to some types of EMC filter. other: GEC Safeclip Auxiliary Fitted on-board to some types of EMC filter. - Page 14 EF, AF LF01...
- Page 15 EF, AF LF01...
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Page 16: Specifications
9.0 S PECIFICATIONS Lenton reserves the right to change specifications without notice. Models Covered by this Manual MODEL Max. Temp Max. Chamber Size Approx. Power (mm) Capacity Weight (°C) (kW) (kg) Chamber furnace heated by coiled resistance wire embedded in light weight ceramic fibre forming the furnace chamber.