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Installation, Operation &
Maintenance Instructions
This manual is for the guidance of operators of the above Carbolite products
and should be read before the furnace is connected to the electricity supply.
Section
Manuals are supplied separately for the furnace controller
Please read the controller manuals before operating the furnace.
1.0
1100°C - 1300°C Chamber Furnaces
types CWF, BWF & RWF
C
ONTENTS
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
(and overtemperature controller when fitted).
page
1
3
5
6
8
10
12
15
16
MF02
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Table of Contents
Related Manuals for Carbolite CWF
Summary of Contents for Carbolite CWF
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Page 1: Table Of Contents
Maintenance Instructions 1100°C - 1300°C Chamber Furnaces types CWF, BWF & RWF This manual is for the guidance of operators of the above Carbolite products and should be read before the furnace is connected to the electricity supply. ONTENTS Section page Symbols &... -
Page 2: Symbols & Warnings
CWF, BWF, RWF & W YMBOLS ARNINGS Switches and Lights Supply Light: when the furnace is connected to the electrical supply the light in the adjacent switch glows Heat Light: the adjacent light glows or flashes to indicate that power is... -
Page 3: Installation
CWF, BWF, RWF NSTALLATION Unpacking & Handling When unpacking or moving the furnace always lift it by its base. Never lift it by the door. Use two people to carry the furnace where possible. Remove any packing material from the door gear and furnace chamber before use. - Page 4 (star or delta at the correct phase to phase voltage). RWF /13 models (and by special order the CWF & BWF /13) can be supplied for use on two phases out of a three phase with neutral supply, leaving one phase unused.
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Page 5: Operation
CWF, BWF, RWF 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 MS03. If cascade control is fitted, see the supplementary manual MS07. - Page 6 Avoid burns. Carbolite can supply tongs, face masks, and heat resistant gloves. Before you remove a hot object from the furnace make sure you have a safe place to put it down.
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Page 7: Maintenance
Power Adjustment The furnace control system incorporates electronic power limiting. The power limit is set to 100% except for the single phase CWF --/23 at 240V (to reduce the current demand to 30A) or for OP.Hi unusual voltages. The power limit parameter may be accessible to the operator, but should not generally be altered. -
Page 8: Repairs & Replacements
CWF, BWF, RWF & 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 Panel Element Replacement (CWF & BWF) See section 5.2 - wearing a face mask is recommended. The chambers have two side-mounted refractory panels in which coiled heating elements are inserted, and one unheated hearth slab.
- Page 10 The special RWF heating elements form the chamber sides, base and roof in a single module. The element is fragile, so spare elements are supplied complete in an insulation box to avoid damage. Disconnect the furnace, remove the back panel, make a plan and disconnect the lead, as for CWF, section 5.6 above.
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Page 11: Fault Analysis
CWF, BWF, RWF 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 HEAT light The controller The thermocouple has broken or has a... -
Page 12: Circuit Diagrams
CWF, BWF, RWF IRCUIT IAGRAMS Safety Switches type A, up to 25A rating: two Door Switches directly in the element circuit. Safety Switch type B, over 25A rating: a single Door Switch in the contactor coil circuit. EMC Filters (if fitted): dependent on the model there may be one filter, or more than one fitted in parallel. - Page 13 CWF, BWF, RWF 3-phase “universal” wiring Filters Contactors Supply light & (2 or 3) Instrument Switch heat heat heat coil coil safety switch if fitted overtemp. controller thermocouple temperature controller thermocouple Fuses F1 are always present in this wiring design.
- Page 14 CWF, BWF, RWF 3-phase without neutral (star – e.g. 380 to 415V) Filter (if fitted) contactor transformer Supply light & Instrument Switch heat heat heat coil safety switch if over- temperature overtemp. fitted controller thermocouple temperature controller thermocouple In this configuration the fuses F2 on the supply side of the transformer may be GEC Safeclip, not 32 x 6mm glass as stated in section 8.1.
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Page 15: Fuses & Power Settings
25A/ph RWF -/23 3-phase 380/220 - 415/240 12.5A/ph 220-240 delta 25A/ph BWF range - same as CWF Power Settings OP.Hi The settings of the power limit parameter are as follows. model volts: 220, 280 230, 400 240, 415 254, 440... -
Page 16: Specifications
80% up to 31°C decreasing linearly to 50% at 40°C 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 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.