Related Manuals for Carbolite Gero EVZ 12/450B
Summary of Contents for Carbolite Gero EVZ 12/450B
- Page 1 Installation, Operation and Maintenance Instructions 1200°C Tube Furnace (3-zone) - EVZ Model: 450mm No Controller EVZ 12/450B + No Controller MEN-EVZ12450B-16_NOCTRL 02-08-2019...
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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 Tube Life Pressure Gas Tightness 5.0 Maintenance General Maintenance Maintenance Schedule 5.2.1 Cleaning 5.2.2 Safety Switch Calibration After-Sales Service Recommended Spare Parts and Spare Parts Kit 6.0 Repairs and Replacements Safety Warning - Disconnection from Power Supply Safety Warning - Refractory Fibre Insulation Temperature Controller Replacement Solid-state Relay Replacement Thermocouple Replacement...
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Page 4: Symbols And Warnings
1.0 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. Heat switch: the switch disconnects power to the heating elements;... -
Page 5: Warning Labels
1.0 Symbols and Warnings Caution – Double Pole/Neutral Fusing Warning Labels On the front control panel there are 2 warning labels as shown in figure 1.3.1; they are numbered 7 and 8. These warnings must be followed for the safe operation of this furnace. - Page 6 1.0 Symbols and Warnings Figure 1.3.1 - Control Box layout and warning Figure 1.3.2- Back of control box showing labels. mains lead socket Index to numbered items in Figure 1.3.1 and 1.3.2 1. Electrical supply switch - switches electrical power ON and OFF to the furnace. 2.
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Page 7: Installation
If the product has been transported or stored in humid conditions it must be dried out completely before operating the furnace. Contact Carbolite Gero Service for instructions. Unpacking and Handling When unpacking or moving the product, always lift it by its base or both ends of the main body. -
Page 8: Setting Up
2.0 Installation If the product is to be used in a process which could liberate hazardous gases, then it should be installed together with a suitable fume extraction system. Ensure that the product is placed in such a way that it can be quickly switched off or disconnected from the electrical supply. - Page 9 2.0 Installation 2.3.1 Figure - Vertical tube furnace model 2.3.2 Figure - Assembling the mounted on its stand. stand. Index to numbered items in Figure 2.3.2 and Figure 2.3.3 1. Vertical stand base 2. Vertical stand upright 3. Fixing screws M6 x 16 dome cap screw 4.
- Page 10 2.0 Installation Using the tube furnace horizontally The furnace can be used either with the stand vertically as shown in 2.3.3 or horizontally as shown in 2.3.4. To use horizontally simply tip the stand over into the horizontal position making sure that the flexible conduits are not trapped beneath the frame.
- Page 11 2.0 Installation Fit tube support bracket, item 7, figure 2.2. Use supplied M6 button head screws and washers. Finally, fit tube support collar, (5) using item (6) until the tube is secure enough for use in a vertical arrangement. Fitting arrangement is shown in figure 2.2. Figure 2.2 - shows an exploded view of all the required parts.
- Page 12 2.0 Installation 2.3.7 Figure - Tube support and end seal 2.3.8 Figure - Tube support and end seal assembly For extra stability of the tube, repeat the assembly instructions above (as shown in figure 2.3.8) on the other end of the tube.
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Page 13: Setting Up - Without A Stand
2.0 Installation 2.3.9 Figure - View showing how to support the work tube in a vertical orientation. Setting Up - Without a Stand Any of the E-range vertical furnaces can be supplied without a stand for either wall mounting (using wall bracket option) or installation in customer's test rig/mounting frame. - Page 14 2.0 Installation 3. Connecting conduit between furnace and control box Fitting the Optional Insulation Plugs and Radiation Shield For optimum temperature uniformity, insulation plugs or radiation shields should be placed in the work tube ends as shown below. With a standard work tube, the insulation plug must be fitted as shown in figure A.
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Page 15: Electrical Connections
2.0 Installation Electrical Connections Connection by a qualified electrician is recommended. All furnaces in the range are single-phase and operate over the voltage ranges 100 to 110 volts or 200 - 240 volts. Check the rating label before connection, see "Warning Labels"... -
Page 16: Temperature Controller
3.0 Temperature Controller 3.0 Temperature Controller If this product is fitted with a temperature controller, instructions are provided separately. -
Page 17: Operation
4.0 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. -
Page 18: 3-Zone Control Methods
4.0 Operation Explosive Materials The furnace must not be used to heat materials which could explode, or which could emit gases that could form explosive mixtures. If the safe heating of a material is dependent on its temperature, only heat these type of materials if the furnace has the optional over-temperature protection device fitted. -
Page 19: Back-To-Back Thermocouples
4.0 Operation A. Back-to-Back Thermocouples This is the most commonly supplied option. The centre zone of the tube furnace is controlled directly by the centre zone temperature controller. The two end zone thermocouples are wired in opposition to the centre zone reference thermocouple. If the temperatures of the centre and end zones are the same then 0°C will be displayed on the end zone controllers. -
Page 20: Independent Control
4.0 Operation For products with the CC-T1 controller, please refer to the separate CC-T1 controller manual for details on how to set an offset trim. To make this adjustment on other controllers, enter thelevel 2 menu of the end zone controllers (see controller operating instruction), scroll to LOC.T (local trim) and use the down buttons to enter the desired positive or negative value. -
Page 21: Tube Life
4.0 Operation Tube Life A ceramic work tube may crack if work pieces are inserted too quickly or at temperatures below 900 °C (when the tube is more brittle). Large work pieces should also be heated slowly to ensure that large temperature differences do not arise. - Page 22 4.0 Operation than inert gases, such as nitrogen.
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Page 23: Maintenance
5.0 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. - Page 24 5.0 Maintenance Seals (if fitted) Check all seals and O-rings and clamps Performance Element Circuit Electrical measurement Measure the current drawn on each Power Consumption phase / circuit Check whether the cooling fans are work- Cooling Fans (if fitted)
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Page 25: Cleaning
Ensure that power to the heating elements is switched off when the door is opened. Contact Carbolite Gero Service and discontinue use of the product if it is found that the heating elements are not fully isolated during these checks. -
Page 26: After-Sales Service
Recommended Spare Parts and Spare Parts Kit Carbolite Gero can supply individual spare parts or a kit of the items most likely to be required. Ordering a kit in advance can save time in the event of a breakdown. -
Page 27: Repairs And Replacements
European Association representing the High Temperature Insulation Wool industry (www.ecfia.eu). Further information can be provided on request. Alternatively, Carbolite Gero Service can quote for any repairs to be carried out either on site or at the Carbolite Gero factory. Temperature Controller Replacement Refer to the controller instructions for more information on how to replace the temperature controller. -
Page 28: Solid-State Relay Replacement
Individual elements are not available for this model of product, if an element fails then a complete element assembly is required. For details and fitting instructions contact Carbolite Gero Service, see the back page of this manual for contact information. -
Page 29: Fuse Replacement
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... -
Page 30: Fault Analysis
7.0 Fault Analysis 7.0 Fault Analysis Furnace Does Not Heat Up The HEAT The heating element Check also that the SSR is working light is ON has failed correctly The controller shows a The HEAT The thermocouple has broken or has very high temperature light is OFF a wiring fault... -
Page 31: Product Overheats
7.0 Fault Analysis Product Overheats Product only heats up The controller when the instrument shows a very high The controller is faulty switch is ON temperature The thermocouple may be The controller faulty or may have been shows a low removed out of the heating temperature chamber... -
Page 32: Wiring Diagrams
8.0 Wiring Diagrams 8.0 Wiring Diagrams WC-13-70 Safety Switch A - A 2-pole Heater Switch is fitted directly in the element circuit in models up to 16 A rating. Safety Switch B - A door switch is fitted into the contactor coil circuit. Above 16 A a 1- pole Heater Switch is fitted into the same circuit, in series. - Page 33 8.0 Wiring Diagrams WC-13-71 Connections below show single phase with indirect safety switches and over- temperature control.
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Page 34: Fuses And Power Settings
9.0 Fuses and Power Settings 9.0 Fuses and Power Settings Fuses F1 - F2: Refer to the circuit diagrams. GEC Safeclip of the type shown Fitted if supply cable fitted. Internal (glass type F up to 16 A) Supply Fitted on board to some types 38 mm x 10 mm type F fitted on Fuses of EMC filter. -
Page 35: Power Settings
9.0 Fuses and Power Settings 9.2 Power Settings The power limit settings (OP.Hi) for this model is as follows. The figures represent the maximum percentage of time that controlled power is supplied to the elements. Do not attempt to "improve performance" by setting a value higher than the one from the table. -
Page 36: Specifications
Vertical 3-zone tube furnaces. EVZ 12/450B 1200 Work tube adaptors, extended work tube supports, insulation plugs and gas/ vacuum end seals are available from Carbolite Gero for work tubes with outside diameters of 32 mm, 46 mm and 60 mm. 10.1 Environment... -
Page 37: Furnace Drying Out Process
If visible signs of moisture are present then allow it to dry out in ambient temperature for at least 24 hours. If the problem persists ensure that the furnace is isolated and contact Carbolite Gero Service for more information. - Page 39 Notes Service Record Engineer Name Date Record of Work...
- Page 40 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.