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Installation, Operation &
Maintenance Instructions
1200°C E-range Compact Tube furnaces
Models:
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
(and over-temperature controller when fitted).
Please read the controller manuals before operating the furnace.
EHA, EVA, EHC, EVC
EST, EVT, EZS, EVZ
CONTENTS
MF65-1.01
Page
2
3
16
19
19
21
22
23
24
1
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Table of Contents
Related Manuals for Carbolite E Series
Summary of Contents for Carbolite E Series
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Page 1: Table Of Contents
1200°C E-range Compact Tube furnaces Models: EHA, EVA, EHC, EVC EST, EVT, EZS, EVZ 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. CONTENTS Section... -
Page 2: Introduction
E range INTRODUCTION Products Covered This manual contains installation and operating instructions for the single-zone tube furnaces of model types EHA, EVA, EST and EVT, and the 3-zone models EHC, EVC, EZS and EVZ. The single-zone models use one controller or programmer operating all elements. The 3-zone models use three controllers, linked to achieve an extended uniform temperature region. -
Page 3: Installation
E range Index to numbered items in Figure 1-1 and Figure 1-2 1- Electrical supply switch – switches electrical power on and off to the furnace. 2- Heater switch – switches electrical power on and off to the furnace heating elements. - Page 4 E range Setting up – horizontal models The EHA and EHC horizontal models must have work tubes fitted before being used. The diameter of the work tube is a customer order option and therefore varies between tube furnaces. Note : If a metal work tube is being used in the furnace, ensure that it is earthed. See the safety warning in Section 3.5, page 18.
- Page 5 E range Fitting the standard work tube in an EST/EZS furnace. (No tools required.) The fitting of the work tube is as follows with reference to Figure 2-3. Please note that standard work tubes are also referred to as tubes suitable for working in air. They are 150mm longer than the heated length of the furnace (see Table 9-1 page 24).
- Page 6 E range Fitting the extended work tube in an EHA/EHC/EST/EZS furnace (Tools required: 4mm Hex key.) The fitting of the work tube is as follows with reference to Figure 2-2 on page 4, Figure 2-3 page 5, Figure 2-5 and Figure 2-6 on page 6. Please note that extended work tubes are also referred to as tubes suitable for working in a modified atmosphere or vacuum.
- Page 7 E range Index to numbered items in Figure 2-5, Figure 2-6, Figure 2-7 and Figure 2-8. Work tube (diameter customer option) Extended work tube support bracket Extended work tube slide bracket Work tube adaptor plates (adaptor plates for 25mm, 43mm and 63mm OD work tubes are supplied in a kit, select the correct ones to suit the work tube outside diameter) Work tube support boss (this is size dependent on work tube diameter) “O”...
- Page 8 E range Setting up – vertical Models The EVA and EVC vertical models must have their stands assembled, the furnace mounted on the stand and their work tubes fitted before they can be used. Assembling the stand and mounting the furnace - (Tools required: 4mm Hex key.) The assembly of the vertical stand is as follows with reference to Figure 2-9, Figure 2-10 &...
- Page 9 E range Using the EVA/EVC/EVT/EVZ horizontally The EVA and EVC models can be used either with the stand vertically as shown in Figure 2-9, page 8 or horizontally as shown in Figure 2-12. 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 10 E range Fitting the extended work tube in an EVA/EVC/EVT/EVZ furnace (Tools required: 4mm Hex key.) The fitting of the work tube is as follows with reference to Figure 2-3, page 5, Figure 2-13, page 9, Figure 2-15 and Figure 2-14 on page 10. Please note that extended work tubes are also referred to as ‘tubes suitable for working in a modified atmosphere or vacuum’.
- Page 11 E range Loosely fit the work tube support boss Figure 2-15 (5), “O” ring (6), clamp ring (7), clamp (8), extended work tube slide bracket (3) and adaptor plate (4) onto the work tube in the position shown in Figure 2-14 (approximately 77 to 79mm from the work tube end). Note that the clamp is on the outside of the bracket and that the gap of approximately 7 to 9mm on the inside of the bracket is to allow the work tube to expand at high temperatures.
- Page 12 E range If gas/vacuum end seals (14) Figure 2-17, page 12 are being fitted follow the separate fitting instructions supplied with the end seals (Installation, Operation & Maintenance Instructions Tube End Seal Gas and Vacuum Application MF64) otherwise, fit the end guard (13) by sliding on and hold in place by the screw knobs (9).
- Page 13 E range Setting up – vertical models supplied without a stand Any of the E-range vertical furnaces (EVA / EVC / EVT / EVZ) can be supplied without a stand for either wall mounting on a wall bracket (order option) or into a customer’s own test rig/mounting frame.
- Page 14 E range Fitting the optional insulating plugs and radiation shield For optimum temperature uniformity insulating plugs or radiation shields should be placed in the work tube ends as shown in . With an extended work tube Figure 2-21 Figure 2-20 Figure 2-22 the stem (8) of the insulation plug assembly lines up with the end of the work tube.
- Page 15 E range Electrical Connections The electrical supply MUST incorporate an earth (ground). Connection by a qualified electrician with the correct certification to meet local legislation is recommended. All E-range furnaces are single-phase models and operate over the voltage ranges 100V to 110V or 200V-240V.
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Page 16: Operation
E range OPERATION 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. Before Operating the Furnace For the safe operation of this furnace the following warnings must be followed: Explosive Materials... - Page 17 To alter the set point refer to the control manual supplied with this furnace. Sometimes a furnace using this type of control does not cool down: the end zone controllers try to remain at the current central temperature. Should this occur, contact Carbolite’s technical department.
- Page 18 E range It is possible to use local trim in the end zone controllers to enter a positive or negative adjustment from the centre zone temperature. Once entered this trim will always be added or subtracted from the retransmitted set temperature. In level 2 of the end zone controller (see controller operating (local trim) and use the ...
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Page 19: Maintenance
To contact Carbolite Engineering Services or Carbolite see the back page of this manual. Recommended Spares Kits Carbolite can supply individual spares, 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 20 Element Replacement Individual elements are not available for this model of furnace, if an element fails then a complete element assembly is required. For details and fitting instructions contact Carbolite Engineering Services, see back of this manual for contact information.
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Page 21: Fault Analysis
E range Fuse Replacement Fuses are marked on the circuit diagram (section 7) with type codes, e.g. F1, F2. A list of the correct fuses is given in section8 page 23. If a fuse has failed, it is advisable for an electrician to check the internal circuits. Replace any failed fuses with the correct type. -
Page 22: Circuit Diagrams
E range CIRCUIT DIAGRAMS Single Phase 200 to 240V wiring diagram for: EHA12/150B to EHA12/600B & EVA12/150B to EVA12/600B fitted to split tube furnace Filter only (if fitted) contactor heater safety Instrument Switch switch switch heat coil customer option Over-temp. controller thermocouple temperature... -
Page 23: Fuses & Power Settings
E range FUSES & POWER SETTINGS Fuses - For wiring diagram information on F1 and F2 refer to Figure 7-1 page 22, for fuse values refer to Table 8-2 and Table 8-3. Table 8-1. Fuse type information. Fitted to all E range models. Internal Each circuit has 2 fuses, in most cases fitted to the 32mm x 10mm type F... -
Page 24: Specifications
(mm) length (mm) 1480 2000 2540 1050 Work tube adaptors, extended work tube supports, insulation plugs, and gas/vacuum end seals are available from Carbolite for work tubes with outside diameters of 32mm, 46mm and 60mm. MF65-1.01... - Page 25 E range Environment The furnaces contain electrical parts and should be stored and used in indoor conditions as follows: Ambient temperature working range. Temperature : 5°C to 40°C Note: In ambient temperatures above 30°C and where the operating temperature is close to maximum the allowable external surface temperature defined in EN 61010-1:2010 may be exceeded Relative humidity.
- Page 26 E range Notes: MF65-1.01...
- Page 27 E range Notes: MF65-1.01...
- Page 28 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.