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Summary of Contents for VERDER AAF 11/7
- Page 1 Installation, Operation and Maintenance Instructions 1100°C Ashing Furnace - AAF Model: 7 Litres No Controller AAF 11/7 + No Controller MEN-AAF1107-005_NOCTRL (29-10-2021)
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Page 2: Table Of Contents
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. - Page 3 Door Plug Replacement Fuse Replacement 7.0 Fault Analysis Furnace Does Not Heat Up Product Overheats 8.0 Wiring Diagrams WA-11-30 WA-11-31 WA-22-30 9.0 Fuses and Power Settings Fuses Power Settings 10.0 Specifications 10.1 Environment...
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Page 4: 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 –... -
Page 5: Prerequisites To Use
1.3 Prerequisites to Use Prior to the commissioning and use of this product, all personnel involved in its installation, operation and maintenance must be deemed competent and have: Read and understood the information contained within this manual Received the relevant training with regard to safety and operation of the product Been provided with the appropriate PPE (Personal Protective Equipment) required for the safe operation of this product Note: The customer is responsible for ensuring that all of the above conditions are... -
Page 6: Installation
2.0 Installation Unpacking and Handling 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. Carefully remove any packing material from inside and around the product before use. -
Page 7: Chimney
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. -
Page 8: Electrical Connections
Duct (75mm-150mm diameter) Ambient air is drawn into duct Chimney 25mm vertical gap between chimney and duct Electrical Connections Connection by a qualified electrician is recommended. This product 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. - Page 9 Electrical Connection Details: Supply Types Supply Terminal Label Cable Colour Reversible or Live- Live - Neutral Live to either power conductor 1-phase Brown to live (For USA 200-240V, connect L1) to the other power conductor N / L2 Blue to neutral (For USA 200-240V, connect L2) to earth...
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Page 10: Temperature Controller
3.0 Temperature Controller If this product is fitted with a temperature controller, instructions are provided separately. -
Page 11: Operation
4.0 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. Over-Temperature option only. -
Page 12: Use Of Probes And Metal Sheathed Thermocouples
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 a hearth tile may be advisable: please consult the Carbolite Gero technical department. Use of Probes and Metal Sheathed Thermocouples Any metal object used to probe into the product chamber while the product is connected to the electrical supply must be earthed. -
Page 13: Power Adjustment
When the product is opened during operation there is considerable radiated heat. Do not keep any flammable objects near the product, nor objects which could be damaged by radiated heat. 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. -
Page 14: Maintenance
5.0 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. Frequency Maintenance Method... - Page 15 Check that all functions are working nor- Operational Check mally Thorough inspection and report incor- Operational Check porating a test of all functions Performance Element Circuit Electrical measurement Measure the current drawn on each Power Consumption phase / circuit Hearth Visual check for fit and damage Check whether the cooling fans are work- Cooling Fans (if fitted)
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Page 16: Cleaning
5.2.1 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. Do not clean with organic solvents. -
Page 17: After-Sales Service
use the product close to its maximum temperature. A quick check using an independent 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. -
Page 18: Repairs And Replacements
6.0 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. -
Page 19: Solid-State Relay Replacement
Solid-State Relay Replacement Disconnect the product from the power supply and remove the appropriate cover as given above. 1. Make a note of the wire connections to the solid state relay, then disconnect them. 2. Remove the solid state relay from the base panel or aluminium plate. 3. -
Page 20: Element Replacement
Element Replacement See section 6.2 - wearing a face mask is required. The chamber of this type of furnace is formed by winding resistance heating wire on to a refractory muffle former. In the event of failure, the whole "wound muffle" assembly must be replaced. - Page 21 Switch the furnace ON and heat to 900 °C without interruption and then dwell 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 previous element failed because of a fault in the control circuit.
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Page 22: Door Plug Replacement
Door Plug Replacement See section 6.2 - wearing a face mask is required. Open the door and remove the door cover from the plug carrier assembly. Remove the old door plug by sliding it upwards out of its carrier. Slide the new plug into the carrier assembly making sure that the plug is the correct way up. - Page 23 If any fuse has failed, it is advisable for an electrician to check the internal circuits. 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.
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Page 24: Fault Analysis
7.0 Fault Analysis Furnace Does Not Heat Up The HEAT The heating element Check also that the SSR is light is ON has failed working correctly The HEAT The controller shows a The thermocouple has broken or light is very high temperature has a wiring fault or code such as S.br The controller shows a... -
Page 25: Product Overheats
Product Overheats Product only heats The controller up when the shows a very high The controller is faulty instrument switch is temperature The thermocouple may be The controller faulty or may have been shows a low removed out of the heating temperature chamber The thermocouple may be... -
Page 26: Wiring Diagrams
8.0 Wiring Diagrams WA-11-30 Connections below show single phase with indirect safety switch(es). F1, F2, F3 Fuses Filter R1/1, R1/2 Relay Contactor Relay Cables Temperature Controller Blue Control Thermocouple Solid State Relay GR/Y Green + Yellow Safety Switch Grey Heat Lamp Pink Element(s) Instrument Switch(es) - Page 27 WA-11-31 Connections below show single phase with safety switches and over-temperature control. F1, F2, F3 Fuses Filter R1/1, R1/2 Relay Contactor Relay Temperature Controller Cables Over-Temperature Controller Blue Over-Temperature Thermocouple Control Thermocouple GR/Y Green + Yellow Solid State Relay Grey Safety Switch Pink Heat Lamp...
- Page 28 WA-22-30 Connections below show 2-phase +N with indirect safety switches. F1, F2, F3 Fuses Filter R1/1, R1/2 Relay Contactor Relay Cables Temperature Controller Blue Control Thermocouple Solid State Relay GR/Y Green + Yellow Safety Switch Grey Heat Lamp Pink Element(s) Instrument Switch(es) Neutral L1/L2...
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Page 29: Fuses And Power Settings
See rating label for current; Customer fitted. Fuses See table below for fuse rating. Recommended if cable fitted. Model Phases Volts Supply Fuse Rating AAF 11/7 1-phase 32 A 40 A AAF 11/7 1-phase AAF 11/7 1-phase 200-208 20 A... -
Page 30: Specifications
(mm) Model Power (°C) (kg) (kW) Ashing Burn-off and Coal and Coke Testing Furnace AAF 11/7 1100 10.1 Environment The models listed in this manual contain electrical parts and should be stored and used in indoor conditions as follows: Temperature: 5 °C - 40 °C... - Page 31 Notes Service Record Engineer Name Date Record of Work...
- Page 32 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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