High-temperature Elevator Furnace LHT 02/16 …...LHT/LB and LHT/LBR series high-temperature bottom-loading laboratory furnaces The electrically driven hearth allows for easy loading

Operating Instructions

High-temperature Elevator Furnace LHT 02/16 LB(R) - LHT 08/18 LB(R)

-> 10.2007

Nabertherm GmbH Bahnhofstrasse 20 28865 Lilienthal/Germany Phone: +49 (4298) 922-0 Fax: +49 (4298) 922-129 [email protected] www.nabertherm.com

Made in Germany

Headquarters: 2/60 Nabertherm GmbH . Bahnhofstr. 20 .28865 Lilienthal/Bremen, Germany . Tel +49 (4298) 922-0, Fax -129 . [email protected] . www.nabertherm.com

Copyright © Copyright by Nabertherm GmbH Bahnhofstrasse 20 28865 Lilienthal Federal Republic of Germany Reg: M01.0023 englisch Rev: 2008-00 No responsibility is accepted for the correctness of this information. We reserve the right to make technical alterations.


1 Introduction ........................................................................................................................................................... 5 1.1 Product Description ......................................................................................................................................... 6 1.2 Total overview of the system........................................................................................................................... 7 1.3 Breakdown of the Model Designation ............................................................................................................. 8 1.4 Scope of Supply............................................................................................................................................... 9

2 Technical data...................................................................................................................................................... 10 2.1 Warranty and Liability................................................................................................................................... 11

3 Safety .................................................................................................................................................................... 12 3.1 Designated use............................................................................................................................................... 12 3.2 Requirements for the operator of the system ................................................................................................. 13 3.3 Requirements for operating personnel ........................................................................................................... 14 3.4 Protective clothing......................................................................................................................................... 14 3.5 Basic measures during normal operation....................................................................................................... 15 3.6 Basic emergency procedures ......................................................................................................................... 15

3.6.1 Behavior in an emergency ........................................................................................................................ 15 3.7 Basic measures during maintenance and repair ............................................................................................. 16 3.8 Environmental regulations............................................................................................................................. 17 3.9 Meaning of the safety symbols used.............................................................................................................. 17 3.10 General dangers in the system ....................................................................................................................... 18

4 Transport, installation, and initial commissioning........................................................................................... 19 4.1 Delivery ......................................................................................................................................................... 19 4.2 Unpacking...................................................................................................................................................... 21 4.3 Securing/packaging for transport................................................................................................................... 23 4.4 Construction and connection requirements.................................................................................................... 24

4.4.1 Installation (Furnace Location)................................................................................................................. 24 4.5 Mounting, installation, and connection.......................................................................................................... 25

4.5.1 Exhaust gas pipe ....................................................................................................................................... 25 4.5.2 Connection to the electrical supply........................................................................................................... 26 4.5.3 Insertion of Solid Ceramic Rods............................................................................................................... 27

4.6 Commissioning.............................................................................................................................................. 28 4.6.1 Molybdenum Disilicide Heating Elements ............................................................................................... 29

4.7 Recommendations for the first heating of the furnace................................................................................... 29

5 Operation ............................................................................................................................................................. 30 5.1 Air Inflow Lever............................................................................................................................................ 31 5.2 Loading/charging........................................................................................................................................... 31

6 Maintenance, cleaning, and repair..................................................................................................................... 32 6.1 Shutting the system down for maintenance ................................................................................................... 34


6.2 Regular maintenance tasks for the furnace .................................................................................................... 35 6.3 Checking the Heating Element Screws.......................................................................................................... 36 6.4 Adjusting the Lifting Table ........................................................................................................................... 38 6.5 Operating and auxiliary materials.................................................................................................................. 40 6.6 Detergent ....................................................................................................................................................... 40

7 Faults .................................................................................................................................................................... 41 7.1 Lowering the Lift Unit - Emergency Hole..................................................................................................... 42

8 Replacement/wearing parts ................................................................................................................................ 43 8.1 Replacing the Heating Element ..................................................................................................................... 45 8.2 Replacing the Thermocouple......................................................................................................................... 51 8.3 Repairing the Insulation................................................................................................................................. 54

9 Accessories (Options) .......................................................................................................................................... 54 9.1 Laboratory Gas Supply Station...................................................................................................................... 54 9.2 Over-temperature Limit Controller................................................................................................................ 54

10 Nabertherm Service ............................................................................................................................................ 55

11 Decommissioning, dismounting, and storage .................................................................................................... 56

12 Declaration of Conformity.................................................................................................................................. 58

13 For Your Notes .................................................................................................................................................... 59


Pos: 1 /TD/Einleitung/Überschrift - Einleitung @ 0\mod_1167823212238_51.doc @ 5139

1 Introduction Pos: 2 /TD/Einleitung/Öfen @ 0\mod_1158157227533_51.doc @ 2084

Dear Customer,

Thank you for choosing a quality product from Nabertherm GmbH.

With this system, you have selected a product which is tailored specifically to your manufacturing and production conditions and of which you can be justifiably proud.

This product is characterized by

− a high-quality finish

− high performance thanks to high efficiency

− high-quality insulation

− low energy consumption

− low noise level

− simple installation

− high easy maintenance

− high spare part availability

Your Nabertherm Team

Note

These documents are only intended for the purchasers of our products and must not be duplicated or imparted to or made accessible to third parties without written approval.

(Copyright and related industrial property rights, German Copyright Act dated 09.09.1965)

Industrial property rights All rights to drawings and other documents plus all rights of disposal are held by Nabertherm GmbH, including in the event of industrial property right applications.

Note

All of the figures shown in these instructions are usually symbolic in nature, i.e. they do not precisely reflect the details of the described system.

Pos: 3 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983


Pos: 4 /TD/Einleitung/Produktbeschreibung/Öfen/Überschrift - Produktbeschreibung @ 0\mod_1167821943807_51.doc @ 5103

1.1 Product Description Pos: 5 /TD/Einleitung/Produktbeschreibung/Öfen/LHT - Hochtemperatur-Elevatorofen-LB/LBR - Produktbeschreibung @ 4\mod_1207057065969_51.doc @ 34533

This high-temperature laboratory furnace is a quality product that will provide many years of reliable operation if cared for and maintained properly. A significant prerequisite is the proper use of the furnace. In development and production, particular value has been placed on safety, functionality, and cost-effectiveness.

LHT/LB and LHT/LBR series high-temperature bottom-loading laboratory furnaces The electrically driven hearth allows for easy loading of the LHT/NB series high-temperature furnaces. With its circumferential heating, this furnace achieves excellent temperature uniformity. In the LHT ../..LBR models, the furnace chamber is separated from the heating elements through use of a plasma-sprayed ceramic tubular retort positioned vertically in the furnace. This design prevents a certain amount of contamination of the load and the heating elements. It is also advantageous for gas injection processes. High-quality insulation materials enable energy-saving operation and short heating times due to low heat storage and thermal conductivity. LHT series high-temperature furnaces can achieve furnace chamber temperatures of max. 1600°C, 1700°C, or 1800°C.

This product has the following additional features:

− High-quality molybdenum disilicide heating elements

− Furnace chamber lined with first-class, durable fiber materials

− Outstanding temperature distribution due to circumferential heating of furnace chamber

− Plasma-sprayed ceramic tubular retort in LBR model to prevent a certain amount of contamination and to improve the temperature distribution

− Double-walled housing with additional cooling via fans for low exterior temperatures

− Furnace chamber with volume of 2 or 8 liters; table with large footprint

− Precise electrical spindle drive with button operation for table

− Rust-free housing made of structural stainless steel sheet

− Adjustable fresh air inlet in the hearth

− Exhaust air vent in roof

− Type B thermocouples

− Switchgear with thyristors in phase angle mode

Optional Features

− Over-temperature limit controller with adjustable cutoff temperature for thermal safety class 2 in accordance with EN 60519-2 as over-temperature protection for furnace and product

− Stackable charge saggars for multilevel loading

− Protective gas connection

− Manual or automatic gas injection system

− RS 422 digital interface

− Retort Pos: 6 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983


Pos: 7 /TD/Einleitung/Lieferumfang/Öfen/Überschrift - Gesamtübersicht der Anlage @ 1\mod_1174302636992_51.doc @ 11332

1.2 Total overview of the system Pos: 8 /TD/Einleitung/Lieferumfang/Öfen/Gesamtübersicht LHT - Hochtemperatur-Elevatorofen-LB/LBR @ 4\mod_1207059121623_51.doc @ 34549

Fig. 1: Overall view of the LHT../.. LB/LBR high-temperature bottom-loading laboratory furnace with controller (figure shows special model with over-temperature limit controller and RS 422 interface) Pos: 9 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983

Controller

Lifting table

Over-temperature limit controller (optional)

Molybdenum disilicide heating element

Power switch (ON/OFF)

Furnace chamber

Exhaust gas tube

Supply air lever for regulating the fresh air supply

Back of furnace: RS 422 digital interface (optional)

Rocker switch for controlling the lifting table

Fan

Retort (LHT ../.. LBR)

Solid ceramic rod

Floor insulation

Power cord

Access hole for emergency lowering of lifting table


Pos: 10 /TD/Einleitung/Produktbeschreibung/Öfen/Überschrift - Entschlüsselung der Modellbezeichnung @ 2\mod_1184245078907_51.doc @ 19775

1.3 Breakdown of the Model Designation Pos: 11 /TD/Einleitung/Produktbeschreibung/Öfen/Entschlüssellung der Modellbezeichnung LHT-Elevatorofen LB/LBR @ 4\mod_1207061269826_51.doc @ 34565

Example Explanation

LHT 02/16 LBR

LHT = High-temperature laboratory furnace

LHT 02/16 LBR

02 = 2-liter furnace chamber (volume in l) 08 = 8-liter furnace chamber (volume in l)

LHT 02/16 LBR

16 = Tmax 1600°C 17 = Tmax 1700°C 18 = Tmax 1800°C

LHT 02/16 LBR

LB = Lift Bottom LBR = Lift Bottom Retort

Fig. 2: Sample model designation (rating plate)


LHT 02/16 LBR 400 V 1/N

13 A 123456

1600°C 50/60 Hz 3.0 kW 2008


Pos: 13 /TD/Einleitung/Lieferumfang/Öfen/Überschrift - Lieferumfang @ 0\mod_1167822508130_51.doc @ 5112

1.4 Scope of Supply Pos: 14 /TD/Einleitung/Lieferumfang/Öfen/LHT/LB-LBR- Hochtemperatur-Elevatorofen - Lieferumfang @ 4\mod_1207062478224_51.doc @ 34581

The scope of supply includes the following components:

System Component Quantity Comment

LHT ../.. high-temperature bottom-loading laboratory furnace

1 x Nabertherm GmbH

Allen wrench 1 x Nabertherm GmbH

Solid ceramic rod 3 x Nabertherm GmbH

Exhaust gas tube 1 x Nabertherm GmbH

Saggar *) According to requirements

Nabertherm GmbH

Power cord *) 1 x Nabertherm GmbH

Gas injection panel *) 1 x

Other components depending on variant - - - See delivery documents

Document Type Quantity Comment

LHT ../.. high-temperature laboratory furnace (table-top model) operating instructions

1 x Nabertherm GmbH

Operating instructions for C 295 controller *)

1 x Nabertherm GmbH

Operating instructions for C 40/C 42 controller *)

1 x Nabertherm GmbH

Operating instructions for C 100 controller *)

1 x Nabertherm GmbH

Operating instructions for 2108i over-temperature limit controller *)

1 x Eurotherm GmbH

Operating instructions for gas injection panel *)

1 x Nabertherm GmbH

Other documents depending on variant 1 x

*) = In scope of delivery depending on variant

Note

Please keep all documents in a safe place. All of the functions of this furnace system have been tested during fabrication and before delivery.



Pos: 16 /TD/Einleitung/Technische Daten/Öfen/Überschrift - Technische Daten @ 0\mod_1167822840737_51.doc @ 5121

2 Technical data

The electrical data are located on the type plate on the side of the furnace.

Pos: 17 /TD/Einleitung/Technische Daten/Öfen/Modell-Tabelle für LHT-Elevatorofen LB/LBR - 1 @ 4\mod_1207119152234_51.doc @ 34603

High-Temperature Laboratory Furnaces

Model Tmax °C

Inner Dimensions in mm Ø h

Outer Dimensionsin mm W D H

Volume in l

Power kW

Weight kg

Minutes to Tmax

LHT 02/16 LB(R)

LHT 08/16 LB(R)

1600

1600

120

*

130

*

540

*

610

*

745

*

2

8

3.0

*

75

*

90

*

LHT 02/17 LB(R)

LHT 08/17 LB(R)

1700

1700

120

*

130

*

540

*

610

*

745

*

2

8

3.0

*

75

*

90

*

LHT 02/18 LB(R)

LHT 08/18 LB(R)

1800

1800

120

*

130

*

540

*

610

*

745

*

2

8

3.6

*

75

*

90

*

* = Upon request

Fig. 3: Dimensions of LHT high-temperature laboratory furnace

Pos: 18 /TD/Einleitung/Technische Daten/Öfen/Tabelle für alle LHT-Elevatoröfen LB/LBR - 1 @ 4\mod_1207121536762_51.doc @ 34619

Electrical Connection 1-phase:

Voltage: 110–240 V

Frequency: 50 Hz or 60 Hz

Thermal Protection Class Furnaces: According to DIN EN 60519-2

Without safety controller: class 0

With safety controller: class 2

Protection Class Furnaces: IP20

W

D

h Ø

H


Ambient Conditions for Electrical Conditions

Temperature: Humidity: +5°C to +40°C, max. 95%

noncondensing

Weight Furnace with accessories: Depending on model (see delivery documents)

Pos: 19 /TD/Einleitung/Technische Daten/Öfen/Tabelle Dauerschalldruckpegel < 85 dB(A) - 2 @ 1\mod_1170750985488_51.doc @ 8913

Emissions Long-term noise pressure level: < 85 dB(A)

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2.1 Warranty and Liability Pos: 21 /TD/Einleitung/Gewährleistung_Haftung/Öfen und Schaltanlagen @ 0\mod_1157536440972_51.doc @ 1569

§

Regarding warranty and product liability, the Nabertherm warranty conditions or individual contractually agreed warranty services apply. The following also applies, however:

Warranty and liability claims in the event of personal injury and material damage are out of the question if these are attributable to one or more of the following causes:

− Each person involved in operating, installing, maintaining or repairing the system must have read and understood the operating instructions. No liability is accepted for damage and malfunctions arising from nonadherence to the operating instructions.

− Improper use of the system.

− Improper installation, commissioning, operation and maintenance of the system.

− Operation of the system with defective safety systems or improperly installed or nonfunctional safety and protective devices.

− Nonadherence to the notes contained in the operating instructions regarding the transport, storage, installation, commissioning, operation, maintenance and setup of the system.

− Unauthorized system design changes.

− Unauthorized operating parameter changes.

− Unauthorized parameterization, setting and program changes.

− Original parts and accessories have been designed especially for Nabertherm furnace systems. Only use original Nabertherm replacement parts. Otherwise, the warranty will be void. Nabertherm assumes no liability for damages resulting from use of nonoriginal parts.

− Catastrophes due to the effects of foreign bodies and force majeure.



Pos: 23 /TD/Sicherheit/Überschrift - Sicherheit @ 0\mod_1158843961540_51.doc @ 3103

3 Safety Pos: 24 /TD/Sicherheit/Überschrift - Bestimmungsgemäße Verwendung @ 0\mod_1167823503921_51.doc @ 5148

3.1 Designated use Pos: 25 /TD/Sicherheit/Bestimmungsgemäße Verwendung LHT-Hochtemperaturöfen (Tischmodell) @ 2\mod_1182347443948_51.doc @ 18724 Safety

This Nabertherm system was designed and manufactured after careful selection of the harmonized standards to be observed as well as other technical specifications. It therefore corresponds to the state of the art, ensuring the highest possible degree of safety.

Only materials with known characteristics and melting temperatures may be used. Check the material safety data sheets if necessary.

Use of the furnace for any other purpose whatsoever such as processing products other than those intended or handling hazardous substances or substances posing a health hazard constitutes improper use and must be agreed upon with Nabertherm in writing.

Whether or not the materials used in the furnace can potentially corrode or destroy the insulation or heating elements must be ascertained.

For furnaces with over-temperature limit controllers, the cutoff temperature must be set to prevent overheating of the material.

Modifications to system equipment must be agreed upon with Nabertherm in writing. It is not permitted to remove, bypass, or shut down safety devices.

The installation instructions and safety guidelines must be observed. Otherwise, the furnace will not be considered as being used as designated, and all claims against Nabertherm GmbH will be void.

Opening the furnace when hot (temperature greater than 200°C) can lead to accelerated wear of the following components: insulation, heating elements, and furnace housing.

Operating with power sources, products, operating equipment, additives, etc. that are subject to the Ordinance on Hazardous Substances or cause risks to the health of operating personnel in any way is not permitted.

- This furnace is designed for commercial use. The furnace must not be used for heating food, animals, wood, grain, etc.

- The furnace must not be used as a workplace heater.

- Do not use the furnace to melt ice or similar materials.

- Do not use the furnace as a clothes dryer.

Note

See safety instructions in the individual sections.

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Note

This product does not comply with the ATEX guideline and must not be used in explosive atmospheres. Operating with explosive gases/mixtures or with gases/mixtures arising during the process is not permitted!



Pos: 28 /TD/Sicherheit/Überschrift - Anforderungen an den Betreiber der Anlage @ 0\mod_1167823775531_51.doc @ 5157

3.2 Requirements for the operator of the system Pos: 29 /TD/Sicherheit/Anforderungen an den Betreiber der Anlage - RHTH, RHTC, LHT, Rohröfen @ 2\mod_1184570280797_51.doc @ 19913

The installation instructions and safety guidelines must be observed. Otherwise the furnace is not considered to be used as designated and all claims against Nabertherm will be void.

This safety can only be achieved in commercial practice when all necessary measures have been taken. It is part of the responsibility of the operator of the system to schedule these measures and check that they are carried out.

The operator must ensure that

− all hazardous gases must be guided out of the work area, e.g. with an exhaust system,

− the suction system is switched on,

− the work area is properly ventilated,

− the system is only operated in correct, functional condition and particularly the safety systems are regularly checked for proper functionality,

− necessary personal safety equipment is provided for maintenance, service, and repair personnel and that it is used,

− these operating instructions, including delivery documentation, is kept with the system. It must be ensured that all personnel with tasks to be carried out on the system can view the operating instructions at any time,

− all safety and operating instruction signage on the equipment is in an easily readable condition. Damaged or illegible signs must be replaced immediately,

− this personnel must be regularly instructed in all relevant questions of work safety and environmental protection, as well as being familiar with the entire operating instructions and particularly the safety instructions therein,

− in case of a hazard judgement (for Germany, see § 5 of the Workplace Protection Law) in which additional hazards are determined to exist due to the special working conditions in the place of use of the system,

− in an operating instruction (for Germany, see § 6 of the Equipment Use Ordinance) all additional instructions and safety instructions are summarized which resulted from a hazard judgement of the workplaces at the system,

− operating personnel to be trained must first work under the supervision of an experienced person. Completed, successful training must be confirmed in writing.

Note In Germany, the general accident protection guidelines of VBG or BGZ must be observed. The national accident prevention regulations of the country of operation apply.



Pos: 31 /TD/Sicherheit/Überschrift - Anforderungen an das Bedienpersonal @ 0\mod_1167825643423_51.doc @ 5166

3.3 Requirements for operating personnel Pos: 32 /TD/Sicherheit/Anforderungen an das Bedienpersonal @ 0\mod_1158218663482_51.doc @ 2155

The system may only be operated by personnel trained, instructed, and authorized to do so. These persons must be familiar with the operating instructions and follow them. The individual responsibilities of the operating personnel must be clearly determined.

Only sufficiently qualified and authorized personnel may operate, maintain, and repair the system.

This personnel must be regularly instructed in all relevant questions of work safety and environmental protection, as well as being familiar with the entire operating instructions and particularly the safety instructions therein.

All control and safety systems may only be actuated by trained personnel.

This data must be completed by the operator:

− Operator __________________________________________________________

− Transport - may only be performed by __________________________________

− Installation - may only be performed by _________________________________

− Commissioning - may only be performed by _____________________________

− Training - may only be performed by ___________________________________

− Error correction - may only be performed by _____________________________

− Maintenance - may only be performed by _______________________________

− Cleaning - may only be performed by __________________________________

− Service - may only be performed by ___________________________________

− Repair - may only be performed by ____________________________________

− Shutdown - may only be performed by _________________________________

Pos: 33 /TD/Sicherheit/Überschrift - Schutzkleidung @ 0\mod_1167825795750_51.doc @ 5175

3.4 Protective clothing Pos: 34 /TD/Sicherheit/Schutzkleidung (für alle Laboröfen) @ 4\mod_1196933839263_51.doc @ 28464

Everywhere in the vicinity of the furnace, pouring pans, and similar components, wear protective clothing which is resistant to spatters of molten metal.

Protect your hands by wearing heat-proof gloves.

Wear a respirator (P2 or higher) to protect your respiratory tract e.g. when working on the fiber insulation.



Pos: 36 /TD/Sicherheit/Überschrift - Grundlegende Maßnahmen bei Normalbetrieb @ 0\mod_1167825919827_51.doc @ 5184

3.5 Basic measures during normal operation Pos: 37 /TD/Sicherheit/Grundlegende Maßnahmen bei Normalbetrieb (LHT ../..-Tischmodell) @ 3\mod_1195478872113_51.doc @ 27827

Warning! General hazards!

Before turning on the system, check and be sure that only authorized personnel is in the working zone of the system and that no-one can be injured by operation of the system!! Before every production start, check and be sure that all safety systems are functioning properly!

Before every production start, check the system for visible damage and be sure that it is only operated in perfect condition! Notify management immediately of any defects found!

Before every production start, remove all materials/objects from the working zone of the system which are not required for production!

At least once a day (see also Service and Maintenance), the following check tasks must be performed:

− check the system for externally detectable damage,

− check the function of all safety systems (e.g. the EMERGENCY STOP system),

− check all hydraulic or pneumatic hoses for leaks and correct connection (if present in the system),

− check gas or oil lines for leaks and correct connection (if present in the system),

− check fan function.

Pos: 38 /TD/Sicherheit/Überschrift - Grundlegende Maßnahmen im Notfall @ 1\mod_1170943369267_51.doc @ 9093

3.6 Basic emergency procedures Pos: 39 /TD/Sicherheit/Überschrift - Verhalten im Notfall @ 1\mod_1170949904855_51.doc @ 9123

3.6.1 Behavior in an emergency Pos: 40 /TD/Sicherheit/Grundlegende Maßnahmen im Notfall - Netzschalter_LHT-Öfen-Controller C295 @ 4\mod_1207130760454_51.doc @ 34635

The power switch/control current switch is located under the controller key panel.

wait time 3 time 4time 2time 1

T2

T1

Fig. 4: Power switch on furnace housing (example)

Pos: 41 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Schalten Sie im Notfall sofort den Ofen am Netzschalter (Stellung „O“) spannungsfrei @ 2\mod_1184232896873_51.doc @ 19735

Note

In an emergency, immediately switch off the voltage supply to the furnace at the power switch (position "O"). Wait until the furnace chamber and attaching parts have cooled to room temperature.

Pos: 42 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Aus Sicherheitsgründen empfehlen wir zusätzlich den Netzstecker zu ziehen. @ 2\mod_1184230540287_51.doc @ 19698

Power switch/control current switch

Controller


Note

Due to safety reasons, we also recommend disconnecting the mains power connector.

Pos: 43 /TD/Allgemeine Hinweise (für alle Anleitungen)/Warnung - Bei unerwarteten Vorgängen im Ofen (z.B. starke Rauchentwicklung oder Geruchsbelästigung) @ 4\mod_1205306579737_51.doc @ 34218

Warning! General hazards! If unusual proceses are occurring in the furnace (e.g., emission of heavy smoke or strong odors), turn the furnace system off immediately. Wait until the furnace has naturally cooled down to room temperature.

Pos: 44 /TD/Allgemeine Hinweise (für alle Anleitungen)/Warnung - Arbeiten an der elektrischen Ausrüstung dürfen nur von ... @ 2\mod_1184228021019_51.doc @ 19673

Warning - danger due to electrical current! Work on the electrical equipment may only be performed by qualified, authorized electricians!

Pos: 45 /TD/Sicherheit/Überschrift - Grundlegende Maßnahmen bei Wartung und Instandhaltung @ 0\mod_1167826060620_51.doc @ 5193

3.7 Basic measures during maintenance and repair Pos: 46 /TD/Sicherheit/Grundlegende Maßnahmen bei Wartung und Instandhaltung @ 0\mod_1158222458436_51.doc @ 2188

Maintenance tasks may only be performed by authorized experts following the maintenance instructions and accident protection guidelines. We recommend that maintenance and repair be performed by Nabertherm GmbH Service. Failure to comply involves the risk of physical injury, death, or significant damage to property!

Switch the system off and secure to prevent unintentional reactivation (lock the main switch and secure with a padlock to prevent switching on) or unplug from the mains power.

Clean up the maintenance area as far as possible.

Warning: suspended loads. Working under a lifted load is forbidden. There is a risk of death.

Before maintenance and repair work, relieve the pressure in the hydraulic equipment! (If fitted on the system).

Never spray the furnace, switching cabinet, or other housings of electrical equipment with water.

After completion of maintenance or repair work and before resuming production, be sure that

− loosened screw fasteners are firmly seated,

− removed safety systems and filters have been replaced,

− all materials, tools and other equipment used in the performance of the maintenance or repair work have been removed from the system's operating area,

− any fluids spilled have been removed,

− loose connections have all been refastened,

− the function of all safety systems (e.g. EMERGENCY SHUTOFF) have been checked and function.



Pos: 48 /TD/Sicherheit/Überschrift - Umweltschutzvorschriften @ 0\mod_1167826189237_51.doc @ 5202

3.8 Environmental regulations Pos: 49 /TD/Sicherheit/Umweltschutzvorschriften Schmierfette-Hydrauliköl-Kühlmittel @ 0\mod_1158223424304_51.doc @ 2199

For all work on and with the system, the legal requirements for waste avoidance and proper recycling/disposal must be observed.

No longer usable problem materials, like lubricants or batteries, do not belong in the garbage or sewer.

For installation, repair, and maintenance work, materials hazardous to ground water like

− lubricating greases and oils

− hydraulic oils

− coolant

− solvent-containing cleaning fluids do not harm the ground or reach the sewage facilities!

These materials must be retained, transported, collected, and disposed of in suitable containers!

Note The operator is responsible for complying with national environmental regulations.

Pos: 50 /TD/Sicherheit/Umweltschutzvorschriften Elektronische Bauteile-Isolierung-Altmetall @ 4\mod_1205143314853_51.doc @ 32563

At the time of delivery this furnace system contains no substances that necessitate classification as hazardous waste. However, processing material residue can accumulate in the furnace insulation during operation. This residue may pose a health and/or environmental hazard.

− Disassembly of electronic components and disposal as electronic scrap

− Removal of insulation and disposal as hazardous waste/hazardous materials (see section entitled "Maintenance, Cleaning, and Upkeep - Handling Ceramic Fiber Materials")

− Disposal of housing as scrap metal

Pos: 51 /TD/Sicherheit/Überschrift - Bedeutung der verwendeten Sicherheitssymbole @ 0\mod_1167826281647_51.doc @ 5211

3.9 Meaning of the safety symbols used Pos: 52 /TD/Sicherheit/Bedeutung der verwendeten Sicherheitssymbole @ 0\mod_1158224449244_51.doc @ 2210

International ISO symbols

Note

In the following operating instructions, concrete safety instructions are given in order to indicate the unavoidable residual risks when operating the system. These residual risks include danger to persons / product / system and the environment.

The symbols used in the operating instructions are primarily intended to draw attention to the safety instructions!

If a warning triangle with the caption "Danger" appears in front of a safety instruction, then risks to the system, material, personnel, and the environment are not ruled out.

If a warning triangle with the caption "Warning" appears in front of a safety instruction, however, then there is no expectation of danger to people.

The symbol used in each case cannot replace the text of the safety instruction. The text must therefore always be read completely!


Warning! General Hazards! This symbol indicates that danger can be expected. (Danger of injury or death)

Warning - danger due to electrical current! Warning of dangerous electrical current in the work area (e.g. switching system, electrical distribution)

Warning - danger due to hot surface and burning

Hot surfaces like hot system parts, furnace walls, doors, or materials, but also hot fluids, are not always detectable.

Note

This symbol designates instruction hints and particularly useful information.

Pos: 53 /TD/Sicherheit/Überschrift - Allgemeine Gefahren an der Anlage @ 0\mod_1168596796288_51.doc @ 6014

3.10 General dangers in the system Pos: 54 /TD/Sicherheit/Allgemeine Gefahren (Verbrennung, Quetschen, Strom) - Laboröfen @ 2\mod_1184666023022_51.doc @ 19974

Warning! General hazards! - Risk of burning on the furnace housing and on the tube

- The door handle/grip can become very hot during operation; wear gloves.

- Risk of crushing on moving parts (door hinge, rotary tube drive, lifting table, etc.)

- The switchgear cabinet (if present) and the terminal boxes on the system contain dangerous electrical voltages.

- Do not insert any objects into the openings on the furnace housing, exhaust air holes, or cooling slots on the switchgear or furnace (if present). This poses a risk of electric shock.

Pos: 55 /TD/Allgemeine Hinweise (für alle Anleitungen)/Warnung - Es dürfen keine Gegenstände auf den/der Ofen/Schaltanlage abgelegt/abgestellt werden... @ 4\mod_1203924555465_51.doc @ 31568


No objects may be placed or set down on the furnace or switchgear. Doing so creates a fire or explosion hazard.

Pos: 56 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Transport, Montage und Erstinbetriebnahme @ 0\mod_1158844227416_51.doc @ 3112


4 Transport, installation, and initial commissioning Pos: 57 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Anlieferung @ 0\mod_1167826534889_51.doc @ 5220

4.1 Delivery Pos: 58 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Anlieferung - (Hinweise allgemein) @ 0\mod_1158233508887_51.doc @ 2223

Check for completeness.

Compare the scope of supply with the delivery note and order papers. Report missing parts and damage caused by defective packaging or transportation to the shipping company and Nabertherm immediately, as subsequent complaints can not be recognized.

Risk of injury When lifting the system, parts or the system itself may tip over, slip, or fall. Before the furnace is lifted, all personnel must leave the work area. Safety boots and safety helmet must be worn.

Safety instructions

− Fork lifts may only be operated by authorized personnel. The driver bears sole responsibility for safe driving and loading.

− When lifting the system, be sure that the ends of the fork and the load itself do not strike nearby stacked materials. Tall parts like switch cabinets should be transported with the crane.

− Use only lifting equipment with sufficient load capacity.

− Lifting equipment may only be attached at the locations provided for it.

− Under no circumstances may built-in parts, piping, or cable channels be used to fasten lifting equipment.

− Lift unpacked parts only using rope or belt slings.

− Attach transport accessories only at the locations provided for them.

− Load bearing and cushioning materials must correspond to the specifications of the accident prevention regulations.

− When selecting load bearing and cushioning materials, take the weight of the system into account! (See chapter "Technical data".)

− Stainless steel parts (fastening elements as well) must always be kept separate from those of unalloyed steel.

− Remove the corrosion protection only immediately before installation.

Warning! General Hazards! Warning: swinging loads. Working under a lifted load is forbidden. There is a risk of death.

Note Follow safety instructions and accident prevention guidelines for fork lifts.

Pos: 59 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Anlieferung für Laboröfen mit einem Hubwagen @ 2\mod_1184672460200_51.doc @ 20000

Transporting with a Lift Truck

Do not exceed the maximum permitted load for the lift truck.

1. For unloading purposes, our furnaces are delivered on a wooden transport frame. Only transport the furnace packaged and using suitable transportation facilities to avoid possible damage. The packaging should only be removed at the installation


location. During transportation, adequate protection to prevent slipping, tipping and damage must be ensured. Transportation and assembly work must be carried out by at least 2 persons. Do not store the furnace in damp rooms or in the open air.

2. Move the lift truck beneath the transport frame. Ensure that the lift truck is pushed completely beneath the transport frame. Note adjacent materials being transported.

Fig. 5: Lift truck is pushed completely beneath the transport frame

3. Carefully lift the furnace, noting the center of gravity. When lifting the system, be sure that the ends of the fork and the load itself do not strike nearby stacked materials.

4. Check the furnace for stable position and attach transportation locks if necessary. Drive carefully, slowly, in the lowest position. Do not move along sloping surfaces.

5. Carefully set the furnace down at the installation location. Note adjacent materials being transported. Avoid sudden lowering.

Pos: 60 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 61 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Legende für Packstücke z.B. zerbrechlich @ 1\mod_1173776713307_51.doc @ 10746

Legend:

The symbols for the handling instructions for packaging are internationally defined in ISO R/780 (International Organization for Standardization) and DIN 55 402 (Deutsches Institut für Normung).

Designation Symbol Explanation

Fragile packaged goods

The symbol is attached for mildly fragile goods. Goods so labeled must be handled with care and under no circumstances allowed to fall or be tied.

Up

The packaging item must always be transported, moved, and stored so that the arrow always points upwards. Rolling, Rollen, folding, significant tipping or tilting, or other types of handling are excluded. However, the loading need not be "on top".

Protect from moisture

Goods so labeled must be protected from high humidity, so they must be stored under cover. If particuarly heavy or large packaged items not be stored indoors, they must carefully be covered with tarps.

Sling here

The symbol indicates merely where the cargo should be slung, but not the method of lifting. If the symbols are applied equidistant from the middle or center of gravity, the package will hang level if the slings are of identical length. If this is not the case, the slinging equipment must be shortened on one side.



Pos: 63 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Auspacken @ 2\mod_1184739517985_51.doc @ 20013

4.2 Unpacking Pos: 64 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Allgemeiner Hinweis zur Verpackung (z.B. Laboröfen) @ 3\mod_1192437185846_51.doc @ 23509

Note The system is packaged extensively to protect against transportation damage. It must be ensured that all packaging materials (including those inside the furnace chamber) are removed. Save the packaging and transportation lock for possible shipping or for storing the furnace.

At least 2 persons (or more depending on the size of furnace) are required for carrying/transporting.

Pos: 65 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Auspacken LHT-Elevatorofen LB/LBR - Teil 1 @ 4\mod_1207643191975_51.doc @ 34893

Wear gloves.

1 2 3

1. Check the transport packaging for damage.

2. Bend up the fastening tabs.

3. Lift up the lid to remove.

Pos: 66 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Auspacken Laborofen - LHT-Elevatorofen LB/LBR - Teil 2 @ 4\mod_1207306695318_51.doc @ 34707

4 5

6

4. Carefully lift up the side parts and remove from the pallet.

5. Compare the scope of supply with the delivery note and the order documents; see section entitled "Delivery." Remove the protective wrap and packaging materials from the furnace.

6. Carefully lift the furnace off of the pallet. The protective wrap (A) on the lifting table is only removed at the installation location.

Pos: 67 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Auspacken-Tragen Laborofen - LHT-Elevatorofen LB/LBR - Teil 3 @ 4\mod_1207293824445_51.doc @ 34683

A


7

8

7. Hold the furnace securely by the bottom sides to carry it. The furnace must not be carried by the lifting table.

8. For furnaces weighing more than 25 kg, transport work must be carried out by at least 2 people. If transport straps are used, they must be attached crosswise only. Ensure that they are secure.

Note

In Germany, the general accident prevent regulations VBG and BGZ must be observed. The national accident prevention regulations of the country of operation apply.

Note

Please keep the packaging for possible shipping or storing of the furnace.


Do not carry by the lifting table.


Pos: 69 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Transportsicherung/Verpackung @ 0\mod_1167826775847_51.doc @ 5229

4.3 Securing/packaging for transport Pos: 70 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Verpackung - Allgemeine Hinweise zur Verpackung - keine spezielle Transportsicherung @ 1\mod_1171004073117_51.doc @ 9153

Note

There are no special load-securing devices on this system for transportation purposes.

The system has been carefully packaged to protect it from damage in transit. All packaging materials (including those inside the furnace chamber) must be removed. All packaging materials are recyclable and can be disposed of normally. The packaging used has been selected to ensure that no special description is necessary.

Pos: 71 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 72 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Bauliche- und Anschlussvoraussetzungen @ 0\mod_1167826890943_51.doc @ 5238


4.4 Construction and connection requirements Pos: 73 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Aufstellung (Standort des Ofens) @ 2\mod_1184848718972_51.doc @ 20166

4.4.1 Installation (Furnace Location) Pos: 74 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Standort eines LHT-Elevatorofens LB/LBR @ 4\mod_1207839457286_51.doc @ 35285

When the furnace is being set up, the following safety instructions must be followed.

− The furnace must be set up in a dry room in accordance with the safety instructions.

− The table/installation surface must be flat to enable the furnace to be installed levelly. The furnace must be placed on a nonflammable surface (stone, metal, or similar).

− The load-bearing capacity of the table must be designed to match the weight of the furnace and the accessories.

− The floor covering must be made of nonflammable material so that hot material falling out of the furnace will not cause the floor covering to ignite.

Although the furnace is well-insulated, the exterior surfaces of the furnace radiate heat. If necessary, this heat must be dissipated (a ventilation technician may need to be consulted). In addition, a minimum clearance (S) of 0.5 m on all sides and 1 m above the furnace must be maintained to flammable materials. In individual cases, more space must be chosen in order to match the local conditions. For nonflammable materials, the minimum side clearance can be reduced to 0.2 m.

If gases and vapors escape from the load, adequate aeration and ventilation at the installation location or a suitable exhaust gas discharge system must be provided. A suitable vent for the combustion exhaust air must be provided by the customer.

Fig. 6: Installation of an LHT high-temperature laboratory furnace

Warning

Ensure adequate ventilation at the installation location to discharge the heat given off and any exhaust gas formed. Failure to do so will cause a fire and health hazard.

Pos: 75 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Vor Inbetriebnahme des Ofens sollte dieser 24 Stunden am Aufstellungsort akklimatisiert .. @ 3\mod_1195568014336_51.doc @ 27871

Nonflammable surface

S

S

S

S

Remove protective wrap.


Note Before commissioning the furnace, it should be acclimatized for 24 hours at the installation location.

Pos: 76 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Montage, Installation und Anschluss @ 0\mod_1167827976269_51.doc @ 5292

4.5 Mounting, installation, and connection Pos: 77 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Abgasführung @ 0\mod_1167828513042_51.doc @ 5310

4.5.1 Exhaust gas pipe Pos: 78 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Abgasführung beim LHT-Elevatorofen LB/LBR @ 4\mod_1207840343288_51.doc @ 35301

We recommend that an exhaust air pipe be connected to the furnace to discharge the exhaust gas.

A standard commercial NW80 to NW120 metal exhaust gas pipe can be used. It must be laid so that it always slopes upwards and must be fastened to the wall or ceiling.

Center the pipe over the furnace flue. The exhaust gas pipe must not be connected to the exhaust air tube because otherwise, no bypass effect is achieved. This is needed to ensure that not too much fresh air is sucked through the furnace.

Fig. 7: Assembly of a vent pipe (example)

Note

The exhaust gases can only be discharged if the room is aerated via an appropriate supply air opening.

Note

Customer-side wall and roof work must be done for the exhaust gas discharge. The size and design of the exhaust gas discharge must be determined by a ventilation technician. The national regulations of the respective country apply.


Vent pipe

Exhaust air tube


Pos: 80 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Anschluss an das Elektronetz @ 0\mod_1168599727688_51.doc @ 6050

4.5.2 Connection to the electrical supply Pos: 81 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Anschluss an das Elektronetz - LHT-Elevatorofen LB/LBR @ 4\mod_1207900931069_51.doc @ 35323

Requirements such as the load capacity of the installation surface, provision of power (electricity), etc. must be fulfilled on-site by customer.

− The furnace must be installed in accordance with the designated use. The AC power connection must match the values given on the rating plate on the furnace.

− The power outlet must be close to the furnace and must be easily accessible. The safety requirements are not fulfilled if the furnace is not connected to an outlet with a ground contact.

− If an extension cable or a power bar is used, its maximum electrical load capacity must not be exceeded. Do not use an extension cable with the furnace if you are not sure if this will guarantee grounding or not.

− The power cable must not be damaged. Do not place any objects on the power cable. Lay cables so that nobody can step on or trip over them.

− A damaged power cable must be replaced immediately.

− Ensure that the furnace connection line is laid in a protected manner.

Note

Before connecting the power supply, ensure that the power switch is set to the "Off" or "0" position.

Fig. 8: Furnace up to 3.6 kW (power cable included with delivery)

1. First plug the supplied power cable into the socket provided for this purpose on the furnace.

2. Now plug the supplied power cable into the AC power supply. Only use a power outlet with a ground contact.

Grounding of the furnace and the switchgear (in accordance with VDE 0100, Part 410) is a prerequisite for the optional ground fault circuit interrupter for the heater.

Rating plate

1.

2.

Click


Test the ground resistance (in accordance with VDE 0100); see also accident prevention regulations.

Electrical systems and equipment in accordance with BGV A3.

Note

For wiring and electrical connections, see the attached circuit diagram. The electrical equipment of the machine can also be seen in the circuit diagram.

Note

The national regulations of the respective country of operation apply.

Warning! Electrical hazard! Work on the electrical equipment may only be performed by qualified, authorized electricians.

Pos: 82 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 83 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Einsetzen der Keramik-Vollstäbe LHT-Elevatorofen LB/LBR @ 4\mod_1207905736943_51.doc @ 35339

4.5.3 Insertion of Solid Ceramic Rods Pos: 84 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Einsetzen der Keramik-Vollstäbe LHT-Elevatorofen @ 4\mod_1207905913127_51.doc @ 35355

MAX

MAX

Fig.9: Insertion of solid ceramic rods

Move the lifting table to the lowest position (see section entitled "Operation"). Insert all 3 solid ceramic rods carefully into the holes in the floor insulation.

The furnace floor is made of a high-quality refractory material, but it is extremely sensitive to shock. The solid ceramic rods fulfill the task of protecting the furnace floor. Damaged solid ceramic rods must be replaced with new ones immediately (see section entitled "Replacement/Wear Parts").

The furnace must not be put into operation without the ceramic rods.

After loading, move the lifting table to the closed position. The load should be centered on the solid ceramic rods in the working chamber and must not protrude over the edge. This

Solid ceramic rod

Lifting table

Charge saggar


ensures uniform heating. Ensure that the maximum load height (– MAX) is not exceeded; not doing so will lead to destruction of the thermocouple, roof insulation, and the load. Ensure that the lifting table has been moved to the uppermost position.

Note

Ensure that the load on the furnace floor does not exceed 2 kg.

Pos: 85 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Erstinbetriebnahme @ 0\mod_1167828977720_51.doc @ 5337

4.6 Commissioning Pos: 86 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Erstinbetriebnahme LHT02,04,08 Öfen - 1 @ 2\mod_1186641509092_51.doc @ 20833

Commissioning of the system may only be performed by qualified personnel observing the safety instructions.

Read the chapter "Safety" as well. When commissioning the system, the following safety instructions must absolutely be followed - this will avoid life-threatening injury to personnel, system damage, and other property damage.

Make sure that the instructions and notes in the controller instructions are observed and followed.

The system may only be used according to its intended purpose.

Be sure that only authorized personnel is in the working are of the machine and that no other person is at risk due to the startup of the system.

Before the first start, check whether all tools, external parts, and transportation locks have been removed from the system.

Activate all safety systems (power switch, EMERGENCY STOP button if available) before commissioning.

Incorrectly wired connections can destroy electrical/electronic components.

Follow the special safety measures (e.g. grounding, etc.) for the components at risk.

Incorrect connections can cause unexpected startup of the system.

Inform yourself before starting the system about the proper behavior in case of malfunction and in case of emergency.

Before the first startup, check the electrical connections and control displays.

Whether or not the materials used in the furnace may corrode or destroy the insulation or heating elements must be ascertained. Substances which cause damage to the insulation include: Alkalines, alkaline earths, metal vapors, metal oxides, chlorine compounds, phosphor compounds and halogens.

Pos: 87 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Vor Inbetriebnahme des Ofens sollte dieser 24 Stunden am Aufstellungsort akklimatisiert .. @ 3\mod_1195568014336_51.doc @ 27871

Note

Before commissioning the furnace, it should be acclimatized for 24 hours at the installation location.

Pos: 88 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Heizelemente aus Molybdän-Disilizid @ 2\mod_1186643920808_51.doc @ 20846


4.6.1 Molybdenum Disilicide Heating Elements Pos: 89 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Heizelemente aus Molybdän-Disilizid @ 2\mod_1186644042985_51.doc @ 20858

Chemical resistance: Furnaces heated with molybdenum disilicide elements (MoSi2) are available for max. furnace chamber temperatures of 1600, 1750 and 1800°C. The max. furnace chamber temperature refers to operation in air. At temperatures of over 800°C, a layer of silicon oxide occurs on the surface of the heating element, protecting it against further oxidation. Such a protective layer is not formed at low temperatures. If the surface of the element is not protected, molybdenum and silicon oxidation can take place at temperatures of around 550°C. This leads to the occurrence of a yellowish powder consisting primarily of molybdenum oxide (MoO3). This chemical reaction has no disadvantageous effects on the performance of the heating element.

Resistance to metals and oxides: The heating elements should never come into contact with solid materials, with the exception of ceramic substrate materials.

Metals: In an oxidizing atmosphere, the majority of metals form scale on the surface (oxide formation occurs due to a thermal influence in an oxidizing atmosphere). This metal oxide may react with the silicon oxide of the heating element and shorten its service life. If the furnace is used to melt metals, it must be ensured that the furnace chamber is protected against metal splashes, soiling and vapors which occur during the melting process (particularly due to fluxing agents). Metal oxides also strongly corrode the insulation of the furnace.

Alkalines: Alkaline compounds may corrode the heating elements. Alkaline compounds also lead to rapid destruction of the insulation.

Ceramic: Ceramic may destroy the heating element on direct contact. Salts and oxides from the ceramic may additionally react with the silicon oxide of the heating element and shorten its service life.

Glass: If glass is melted, the furnace atmosphere contains contaminants, the composition of which depends on the relevant glass product. These components usually act as a fluxing agent on the silicon oxide layer. As a result, its viscosity is reduced and the silicon oxide flows slowly down the heating element. However, new silicon oxide is immediately formed again, with the result that the service life is not noticeably shortened. The insulation may also be severely corroded depending on the type of glass.

Pos: 90 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Überschrift - Empfehlung für das erste Aufheizen des Ofens @ 0\mod_1167829134269_51.doc @ 5346

4.7 Recommendations for the first heating of the furnace Pos: 91 /TD/Transport_Montage_Inbetriebnahme/Erstinbetriebnahme/Empfehlung für das erste Aufheizen des Ofens LHT... - Öfen @ 2\mod_1186655248282_51.doc @ 20883

To achieve a protective oxide layer on the heating elements, the furnace must be heated to 100°C below its max. temperature in approx. 1 hour. This temperature must be maintained for approx. 1 hour. This process must be carried out on commissioning, after exchanging the heating elements or to regenerate the oxide layer. Odor pollution may occur during heating; this is due to the escape of binder from the insulating material. We recommend ventilating the furnace location well during the first heating phase.

Tears in the insulation The insulation of the furnace consists of a very high-quality refractory material. Heat expansion may cause tears in the insulation even after a few heating cycles. However, these have no affect on the function or quality of the furnace.



Pos: 93 /TD/Betrieb_Bedienung/Überschrift - Bedienung 1 @ 3\mod_1186740685002_51.doc @ 20988

5 Operation Pos: 94 /TD/Betrieb_Bedienung/Bedienung LHT-Elevatorofen LB/LBR @ 4\mod_1207913918826_51.doc @ 35375

Fig. 10: Switchgear with controller

1. The control current is turn on and off via the power switch (1). If the control current is on, the heating chamber temperature is shown on the LED display on the controller (3).

2. The lifting table can be moved up and down continuously using the rocker switch.

3. Set the desired heating and cooling program on the controller (3). Please see the separate manual for a description of the controller.

4. Set the temperature on the (optional) over-temperature limit controller (4) 30°C higher than the temperature set on the controller. Please see the separate manual for a description of the over-temperature limit controller.

Note

Continuous operation at the maximum temperature can lead to accelerated wear of the heating elements and the insulation. We recommend working at approx. 50°C below the maximum temperature.

Note

The furnace has a double-walled housing with forced ventilation. When switching on the furnace, check the function of the fan (can be heard as a quiet "humming" coming from the housing).

Pos: 95 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Beschreibung der Eingabe von Temperaturen, Zeiten und „Starten“ des Ofens siehe separate A @ 3\mod_1188809986550_51.doc @ 21015

3

2

OFF

ON

DOWN

UP

1

4 (optional)


Note See separate operating instructions for a description of entering temperatures and times and "starting" the furnace.

Pos: 96 /TD/Betrieb_Bedienung/Überschrift - Zulufthebel @ 3\mod_1188982021389_51.doc @ 21118

5.1 Air Inflow Lever Pos: 97 /TD/Betrieb_Bedienung/Zulufthebel für LHT-Elevatoröfen LB/LBR - Modelle @ 4\mod_1207914352190_51.doc @ 35391 D

The air supply rate can be set on the supply air lever. The supply air lever is located on the lower side of the door. The position is indicated by the symbols beside/on the lever.

Fig. 11: Supply air lever

Supply air lever is Supply air lever is completely open closed

Fig. 12: Regulation of fresh air supply (symbols)

Pos: 98 /TD/Betrieb_Bedienung/Überschrift - Beschickung/Chargierung @ 0\mod_1167835476044_51.doc @ 5418

5.2 Loading/charging Pos: 99 /TD/Betrieb_Bedienung/Beschickung/Chargierung LHT-Elevatorofen LB/LBR - 1 @ 4\mod_1208153687959_51.doc @ 35429

Charging the Furnace

Move the lifting table to the lowest position.

Only materials with known characteristics and melting temperatures may be used. Check the material safety data sheets if necessary.

When loading the furnace, ensure that the furnace lining and the heating elements (and retort pipe for LHT ../.. LBR models) do not get damaged. Ensure that you do not touch the heating elements when loading the furnace, since this can immediately destroy them.

After loading, move the lifting table to the closed position. The load should be centered on the solid ceramic rods in the working chamber and must not protrude over the edge. This ensures uniform heating. Ensure that the maximum load height (– MAX) is not exceeded; not doing so will lead to destruction of the thermocouple, the roof insulation, and the load. Ensure that the lifting table has been moved to the uppermost position.

Supply air lever


Placing a large quantity of material in the furnace chamber can lengthen the heating time considerably.

I If a crucible is used, make sure that the material to be melted is inserted carefully into the crucible. Crucibles are sensitive to shocks and impact. Metals expand more quickly and strongly than the crucible when heated. Be sure that the recommendations of the crucible manufacturer for maintenance and handling are carefully observed.

If possible, the furnace must not be opened when hot. If it is necessary to open the furnace when hot, it must be done as quickly as possible. Ensure adequate protective clothing and room ventilation; see section entitled "Safety."

The stainless steel sheet can become discolored (especially if the furnace is opened while hot), but this does not impair the function of the furnace.

Additional Precautionary Measures Ensure that objects such as teapots and bottles are kept away from the furnace.

Warning! Electrical hazard!

To protect the operator and the furnace, always ensure that the heating program is stopped when the furnace is being loaded. Failure to do so may result in electric shock.

Pos: 100 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Wartung, Reinigung und Instandhaltung @ 0\mod_1167835785730_51.doc @ 5436

6 Maintenance, cleaning, and repair Pos: 101 /TD/Wartung_Reinigung_Instandhaltung/Wartung, Reinigung und Instandhaltung - Laboröfen @ 3\mod_1188908437969_51.doc @ 21071


Cleaning, lubrication, and maintenance tasks may only be performed by authorized experts following the maintenance instructions and accident protection guidelines. We recommend that maintenance and repair be performed by Nabertherm GmbH Service. Failure to comply runs the risk of bodily injury, death, or significant property damage!

Warning - danger due to electrical current! Work on the electrical equipment may only be performed by qualified, authorized electricians!

During maintenance work, the voltage supply to the furnace and/or switching system must be switched off to prevent unintentional commissioning. Disconnect the mains power connector due to reasons of safety.

Operators may only correct malfunctions which are obviously due to operational error!

Wait until the furnace chamber and attaching parts have cooled to room temperature.

The furnace must be visually inspected at regular intervals for damage. The interior of the furnace must also be cleaned as required (e.g. vacuuming out) Attention: Do not bang against the heating elements to avoid breaking them.

While work is being performed on the furnace, the furnace and work room must additionally be ventilated with fresh air.

Safety systems removed during maintenance tasks must be replaced after the work.

Warning of swinging loads in the workshop (e.g. crane systems). Work under a lifted load (e.g. a lifted furnace or switching system) is not permitted.

Safety switches and any limit switches present must be checked for function periodically (BGV A3) or according to the national guidelines of the country of operation.


To ensure proper temperature regulation of the furnace, the thermocouple must be checked for damage before every process.

If necessary, retighten the element holders (see chapter "Replacing the Heating Element"). Before carrying out this work, the voltage supply to the furnace and/or switching system must be switched off (disconnect mains power connector). The regulations (BGV A3) or corresponding national regulations in the relevant country of operation must be observed.

There are one or more contactors in the control system. The contacts of these circuit breakers are wearing parts and must therefore be serviced and/or replaced regularly (BGV A3) or according to the national guidelines of the country of operation.

The switching system cabinet (if available) contains vent grilles with integrated filter mats. These must be cleaned and/or replaced at regular intervals in order to ensure sufficient intake and outflow of air from the switching system. During melting operation, the switching cabinet door must always be firmly closed.

Pos: 102 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Dieser Ofen enthält in der Isolierung keramisches Fasermaterial. @ 3\mod_1190114970393_51.doc @ 21866

This furnace contains ceramic fiber material in the insulation. Active handling of these fibers (e.g., exchange of the insulation) in the Federal Republic of Germany is subject to the conditions of the Ordinance on Hazardous Substances, Annex V, No. 7 ("Artificial mineral fibers") of June 12, 1998. In the rest of the European Union, ceramic fibers are categorized as follows by Directive 97/69/EC of the Commission of December 5, 1997 CARC. Cat. 2; R 49; Xi R 38. Work with the fiber insulation must therefore be done in such a way that as little fiber dust as possible is released.

The following points must be noted when handling ceramic fiber:

- Dust development during processing should be minimized.

- Contact with skin and eyes should be avoided. The effects caused by fibers on the skin or in the eyes may cause mechanical irritation, as a result of which reddening and itching may occur.

- When processing large quantities of ceramic fibers, loose work clothing with long sleeves, gloves and safety glasses should be worn.

- When working with ceramic fiber insulation inside furnaces, a half/quarter mask with P2 filter should additionally be worn.

The furnace and its operating equipment must be regularly checked in accordance with the regulations of the employer's liability insurance association (BGV A3) or the corresponding national regulations in the relevant country of use!



Pos: 104 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Stillsetzung der Anlage für Wartungsarbeiten @ 0\mod_1167835907715_51.doc @ 5445

6.1 Shutting the system down for maintenance Pos: 105 /TD/Wartung_Reinigung_Instandhaltung/Stillsetzung der Anlage für Wartungsarbeiten - Laboröfen @ 3\mod_1188977196773_51.doc @ 21093

Warning! General hazards! Cleaning, lubrication, and maintenance tasks may only be performed by authorized experts following the maintenance instructions and accident protection guidelines. We recommend that maintenance and repair be performed by Nabertherm GmbH Service. Failure to comply runs the risk of bodily injury, death, or significant property damage! Wait until the furnace chamber and attached parts have cooled to room temperature

− The furnace must be completely emptied.

− Notify operating personnel and specify a supervisor.

− Switch off the main switch and disconnect the mains power connector.

− Lock the main switch and secure against restoration of power using a padlock.

− Attach a warning sign on the main switch.

− Seal off a large area around the servicing area.

− Check for disconnection of power.

− Ground and short-circuit the working area.

− Cover any nearby parts still under power.


Do not touch any object without first checking its temperature.

Pos: 106 /TD/Ersatz-/Verschleißteile/Warnung - Gefahren durch elektrischen Strom - für alle Öfen @ 3\mod_1189491390787_51.doc @ 21273

Warning - danger due to electrical current!

Work on the electrical equipment may only be performed by qualified and authorized specialist electricians. During maintenance work, the voltage supply to the furnace and switching system must be switched off to prevent unintentional commissioning (disconnect mains power connector) and all moving parts of the furnace must be secured. Observe BGV A3 or corresponding national guidelines of the country of use. Wait until the furnace chamber and attached parts have cooled to room temperature.



Pos: 108 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Regelmäßige Wartungsarbeiten am Ofen @ 0\mod_1167836306681_51.doc @ 5463

6.2 Regular maintenance tasks for the furnace Pos: 109 /TD/Wartung_Reinigung_Instandhaltung/Regelmäßige Wartungsarbeiten (Wartungstabelle) am LHT../.. - Ofen @ 3\mod_1188985436599_51.doc @ 21144

Item/ Maintenance Point

Action Maintenance Interval Operating Qualified

Day Week Month Quarter Year Personnel Safety test in accordance with BGVA3 or corresponding national regulations

According to regulations ● x

EMERGENCY STOP device

Press the button or power switch

● x

Drives and third-party subassemblies

Maintain according to manufacturers' instructions

● x

Safety and limit switches (if present)

Perform functional test ● x

Furnace chamber, exhaust holes and pipes

Clean and check for damage; vacuum out carefully

● x

Seal surfaces: door lining/furnace lining

Perform visual inspection ● x

Seals (if present) Clean/replace ● x

Heating elements (without retort)

Perform visual inspection ● x

Screws on element holders: see section entitled "Inspecting the screws on the heating elements"

Inspect element holders and carefully tighten if necessary

● ● x

Check for uniform power consumption on heating system

Perform functional test ● x

Thermocouple Perform visual inspection of display

● x

Settings Check according to work schedules

● x

Settings on overtemperature limit controller

Each time the heat treatment program is changed

● x

Legend: ■ = clean ● = check, replace x = performed by Fig. 13: Maintenance table Pos: 110 /TD/Allgemeine Hinweise (für alle Anleitungen)/Warnung - Arbeiten an der elektrischen Ausrüstung dürfen nur von ... @ 2\mod_1184228021019_51.doc @ 19673


Work on the electrical equipment may only be performed by qualified, authorized electricians!

Pos: 111 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Wartungsarbeiten dürfen nur von autorisierten Fachpersonen unter Beachtung von ... @ 1\mod_1173971704689_51.doc @ 11131

Note

Maintenance tasks may only be performed by authorized experts following the maintenance instructions and accident protection guidelines. We recommend that maintenance and repair be performed by Nabertherm GmbH Service.

Pos: 112 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Schrauben der Heizelemente überprüfen @ 3\mod_1190116405102_51.doc @ 21878


6.3 Checking the Heating Element Screws Pos: 113 /TD/Ersatz-/Verschleißteile/Warnung - Gefahren durch elektrischen Strom - für alle Öfen @ 3\mod_1189491390787_51.doc @ 21273



Pos: 114 /TD/Ersatz-/Verschleißteile/Vorsicht - Beschädigung von Bauteilen! Heizelement austauschen @ 3\mod_1189491634400_51.doc @ 21286

Caution - damage to components!

Heating elements are extremely sensitive to breaking. Any strain on or rotation of the heating elements must be avoided. Failure to observe this rule will lead to the immediate destruction of the sensitive heating elements.

Pos: 115 /TD/Ersatz-/Verschleißteile/Abluftröhrchen am LHT../.. - Ofen (Tischmodell) -Demontage - 2 @ 3\mod_1189493593653_51.doc @ 21325

Exhaust air pipe

First slacken the screws (A) from the exhaust air pipe guard plate using the enclosed Allen key. Lift the guard plate (B) from the exhaust air pipe and then carefully pull the exhaust air pipe (C) out straight upwards. Store the exhaust air pipe in a safe place, as its material is very sensitive.

Fig. 14: Removing the exhaust air pipe

Pos: 116 /TD/Ersatz-/Verschleißteile/Ofendeckel LHT-Elevatorofen LB/LBR - Demontage - 3 @ 4\mod_1208157145315_51.doc @ 35445

Removing the Furnace Lid Undo the screws (A) on the lid using the supplied Allen wrench and pull up the lid to remove (B).

Fig. 15: Furnace lid


A B

A B C


Pos: 118 /TD/Wartung_Reinigung_Instandhaltung/Schrauben der Heizelemente am LHT-Ofen überprüfen @ 3\mod_1190122975915_51.doc @ 21903

Checking the element holder screws and retightening if necessary

All screws must be carefully retightened after one week's operation and then once per year. Any strain on or rotation of the heating element must be avoided. The element must be secured with pliers to prevent rotation. Failure to observe this rule will lead to the immediate destruction of the sensitive heating elements.

Fig. 16: Securing element holder screws.

Pos: 119 /TD/Ersatz-/Verschleißteile/Ofendeckel LHT-Elevatorofen LB/LBR - Montage - 9 @ 4\mod_1208164646344_51.doc @ 35464

Installing the Furnace Lid Attach the lid (A) and fasten it with the previously removed screws. Ensure that the lid is positioned properly (missing exhaust air openings in the lid point backward in the direction of the switchgear).



A B

Element holder

Hexagonal screw (WAF 7)


Pos: 121 /TD/Ersatz-/Verschleißteile/Abluftröhrchen am LHT../.. - Ofen (Tischmodell) -Montage - 10 @ 3\mod_1189495290159_51.doc @ 21432

Assembling the exhaust air pipe

Carefully push the exhaust air pipe (A) into the intended opening. The head of the exhaust air pipe must lie on the furnace lid. Reassemble the exhaust air pipe guard plate (B) using the previously slackened screws (C).

Fig. 18: Assembling the exhaust air pipe

Pos: 122 /TD/Ersatz-/Verschleißteile/Netzstecker einstecken (siehe Kapitel „Anschluss an das Elektronetz“) danach Netzschalter ... @ 3\mod_1190014559588_51.doc @ 21847

Commissioning

Insert the mains power connector (see chapter "Connection to the Mains Electricity"), then switch on the power switch and check the function of the furnace (see chapter "Operation").

Pos: 123 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Justierung des Hubtisches @ 4\mod_1208504191310_51.doc @ 35851

6.4 Adjusting the Lifting Table Pos: 124 /TD/Ersatz-/Verschleißteile/Warnung - Gefahren durch elektrischen Strom - für alle Öfen @ 3\mod_1189491390787_51.doc @ 21273

Warning - danger due to electrical current! Work on the electrical equipment may only be performed by qualified and authorized specialist electricians. During maintenance work, the voltage supply to the furnace and switching system must be switched off to prevent unintentional commissioning (disconnect mains power connector) and all moving parts of the furnace must be secured. Observe BGV A3 or corresponding national guidelines of the country of use. Wait until the furnace chamber and attached parts have cooled to room temperature.

Pos: 125 /TD/Wartung_Reinigung_Instandhaltung/Werkzeuge (wird benötigt für die Justierung des Hubtisches - LHT-Elevatorofen LB/LBR) - 1 @ 4\mod_1208852004165_51.doc @ 35933

Tools To adjust the lifting table, you will need the following tools:

1 2

Fig. 19: Tools

Pos: 126 /TD/Wartung_Reinigung_Instandhaltung/Justierung des Hubtisches am LHT-Elevatorofen LB/LBR @ 4\mod_1208504508324_51.doc @ 35867

− Completely empty the furnace.

− Move the lifting table to the middle position.

− Pull the power cable out of the socket on the back wall of the furnace.

− Remove the screws on the back wall of the furnace and carefully remove the back wall (be careful of the cables on the inside back wall).

1 – Allen wrench (supplied with furnace) 2 – Open-end wrench (SW 10)

A B C


− Pull the grounding cable out of the socket on the back wall of the furnace.

A

A

Fig. 20: Back wall of furnace/grounding cable There are 4 hex screws on the lift unit. The 2 upper hex screws (A) should just be loosened slightly. The lower hex screws (B) should be removed (see figure below).

A

B

A

BC C

A

B

Fig. 21: Fixing screws The two Allen bolts (C) are used to adjust (lower/raise) the lifting table. To lower the lifting table, turn both Allen bolts counterclockwise by the same amount; to raise the table, turn them clockwise (see figure below).

C

C

Fig. 22: Lowering/raising the lifting table Ensure that the gap between the upper edge of the lifting table and the lower edge of the furnace is uniform all around the furnace. After making the adjustment, tighten all 4 hex screws (A/B) by the same amount. Assembly is done in the reverse order.


A

AA

B

Fig. 23: Lifting table/hex screws

Pos: 127 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Betrieb- und Hilfsmittel @ 0\mod_1167837161458_51.doc @ 5499

6.5 Operating and auxiliary materials Pos: 128 /TD/Wartung_Reinigung_Instandhaltung/Überschrift - Reinigungsmittel @ 0\mod_1167837229988_51.doc @ 5508

6.6 Detergent Pos: 129 /TD/Wartung_Reinigung_Instandhaltung/Reinigungsmittel @ 0\mod_1158657592397_51.doc @ 2843

For dirt, use commercially available water-based or non-combustible, solvent-free cleaning agents to clean the housing; use air suction to clean the interior.

Be sure that the cleaning agent does not damage the water-soluble and therefore environmentally friendly paint.

(E.g. isopropanol and water). Test the paint in a concealed area.

Observe the labeling and instructions on the packaging of the cleaning agent.

After cleaning, check all supply lines and connections for leaks, loosened connections, abraded spots, and damage; report any defects immediately!


6–8

mm


Pos: 131 /TD/Störungen/Fehlersuche/Öfen/Überschrift - Störungen @ 0\mod_1167837724781_51.doc @ 5526

7 Faults Pos: 132 /TD/Störungen/Fehlersuche/Öfen/Störungstabelle Ofen (allgemeine Hinweise) @ 1\mod_1171363750459_51.doc @ 9646

Work on the electrical system may only be performed by qualified, authorized electricians!

Operators may only correct malfunctions which are obviously due to operational error!

For faults which you cannot locate yourself, call the local electrician.

If you have questions, problems, or desires, please contact Nabertherm GmbH. In writing, by telephone, or through the Internet see Nabertherm Service

Pos: 133 /TD/Störungen/Fehlersuche/Öfen/Störungstabelle Laborofen LHT-Tischmodell @ 4\mod_1205479967638_51.doc @ 34312

Type of fault Possible causes Fault rectification

Controller does not switch on. -No voltage available. -Controller defective.

-Check connection fuse(s), renew if necessary. -Check controller fuses (if available), renew if necessary. -Check plug connector.

Controller indicates fault. -See separate instructions for controller.

-See separate instructions for controller.

No heating chamber heating after starting program.

-Error in program input. -Connection fuse(s) defective. -Heating element defective

-Check heating program (see separate instructions for controller) -Check connection fuse(s), renew if necessary. Notify Nabertherm Service if the new fuse trips on screwing in. -Have checking carried out by Nabertherm Service.

Very slow heating chamber heating.

-Connection fuse(s) defective. -Check connection fuse(s), renew if necessary. Notify Nabertherm Service if the new fuse trips on screwing in.

Selected end temperature is not reached.

-Lack of heater output due to undervoltage. -Heating element defective

-Have checking carried out by Nabertherm Service.

Pos: 134 /TD/Störungen/Fehlersuche/Öfen/Störungstabelle LHT LB/LBR-Absenken des Hubtisches im Notfall @ 4\mod_1208502649337_51.doc @ 35841

Lifting table cannot be lowered - Fuse (fuses) on the connector is (are) defective - Electrical drive is damaged

- Inspect fuse(s) on the connector and replace if necessary. - Lower the lift unit via the emergency hole (see section entitled "Lowering the Lift Unit – Emergency Hole").

Pos: 135 /TD/Störungen/Fehlersuche/Öfen/Überschrift - Absenken der Hubeinheit - Notöffnung @ 4\mod_1208502374431_51.doc @ 35819


7.1 Lowering the Lift Unit - Emergency Hole Pos: 136 /TD/Störungen/Fehlersuche/Öfen/Absenken der Hubeinheit - Notöffnung - LHT-Hochtemperatur-Elevatorofen LB/LBR @ 4\mod_1208502352352_51.doc @ 35803

If the electrical drive is damaged, the lift unit can be lowered manually. There is a cover on the top of the switchgear. The screw on this cover should be removed and the cover then taken off.

Fig. 24: Removing the cover Using an Allen wrench, turn the Allen bolt underneath counterclockwise. The lifting table is slowly lowered through rotation of the lifting spindle.

Fig. 25: Lowering the lift unit - emergency hole


Lifting spindle


Pos: 138 /TD/Ersatz-/Verschleißteile/Überschrift - Ersatz-/Verschleißteile @ 0\mod_1164125252056_51.doc @ 4243

8 Replacement/wearing parts Pos: 139 /TD/Ersatz-/Verschleißteile/Ersatzteilzeichnung eines LHT-Elevatorofen LB/LBR - Gesamtanlage @ 4\mod_1208165708067_51.doc @ 35480

Fig. 26: Replacement parts on LHT ../ .. LB/LBR high-temperature bottom-loading laboratory furnace (example drawing)

Pos: 140 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Heizelemente - LHT-Elevatorofen LB/LBR @ 4\mod_1208166704035_51.doc @ 35496

1

4

2

3

9

10

6

5

7

8


Heating Element

No. Furnace Model Name Part Number Quantity Included With Replacement Parts Delivery

LHT 02/16/17 Heating element 692 251 855 4

LHT 08/16/17 Heating element Upon request --

LHT 02/18 Heating element Upon request 4

1

LHT 08/18 Heating element Upon request --

- - -

Pos: 141 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Thermoelement - LHT-Elevatorofen LB/LBR @ 4\mod_1208167587693_51.doc @ 35512

Thermocouple

No. Furnace Model Name Part Number Quantity

LHT 02/08/ 16/17/18

Thermocouple Type B, 115 mm installation wire 0.5 mm

540 300 384 1 (2*) 2

LHT 02/08/ 16/17/18

Thermocouple Type S, 115 mm installation wire 0.5 mm

540 300 385 1 (2*)

*) Furnaces with over-temperature limit controllers are equipped with 2 thermocouples each

Pos: 142 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Abluftröhrchen - LHT-Elevatorofen LB/LBR @ 4\mod_1208167764372_51.doc @ 35528

Exhaust Air Tube


3 LHT 02/08/ 16/17/18

Exhaust air tube (collar pipe) length = 148 mm

692 040 198 1

Pos: 143 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Keramik-Vollstab - LHT-Elevatorofen LB/LBR @ 4\mod_1208167828151_51.doc @ 35544

Solid Ceramic Rod


LHT 02/16/17/18 Solid ceramic rod, Ø 4 mm 692 070 119 3 4

LHT 08/16/17/18 Solid ceramic rod, Ø 4 mm 692 070 119 3

Pos: 144 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Hubtisch-Boden-Isolieraufbau - LHT-Elevatorofen LB/LBR @ 4\mod_1208167903565_51.doc @ 35560

Complete Lifting Table Insulation


LHT 02/16/17 Complete floor insulation, Ø 172 x 80 mm

691 601 185 1 5

LHT 08/16/17 Complete floor insulation

Upon request 1

Pos: 145 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Sonstige Ersatzteile - LHT-Elevatorofen LB/LBR @ 4\mod_1208168126712_51.doc @ 35576


Other Replacement Parts

Furnace Model

LHT 02-08/ 16/17

LHT 02-08/18

No. Name Part Number

Quantity

6 7 8 9 10

- Semiconductor fuse - Clamp - Element holder - Connector contact - Connector bridge

*) 691 800 033 691 800 048 691 800 046 691 800 047

1 8 8 4 2

1 Upon request Upon request Upon request Upon request

*) = In scope of replacement parts delivery depending on variant

Pos: 146 /TD/Ersatz-/Verschleißteile/Ersatzteilliste-Werkzeug - LHT-Elevatorofen LB/LBR @ 4\mod_1208168218302_51.doc @ 35592

Tools


- - - LHT 02/08 16/17/18

Heating element pliers

Allen wrench

493 000 015

493 000 021

According to requirements

Pos: 147 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 148 /TD/Ersatz-/Verschleißteile/Überschrift - Heizelement austauschen @ 2\mod_1186579087875_51.doc @ 20756

8.1 Replacing the Heating Element Pos: 149 /TD/Ersatz-/Verschleißteile/Warnung - Gefahren durch elektrischen Strom - für alle Öfen @ 3\mod_1189491390787_51.doc @ 21273

Warning - danger due to electrical current! Work on the electrical equipment may only be performed by qualified and authorized specialist electricians. During maintenance work, the voltage supply to the furnace and switching system must be switched off to prevent unintentional commissioning (disconnect mains power connector) and all moving parts of the furnace must be secured. Observe BGV A3 or corresponding national guidelines of the country of use. Wait until the furnace chamber and attached parts have cooled to room temperature.

Pos: 150 /TD/Ersatz-/Verschleißteile/Vorsicht - Beschädigung von Bauteilen! Heizelement austauschen @ 3\mod_1189491634400_51.doc @ 21286

Caution - damage to components! Heating elements are extremely sensitive to breaking. Any strain on or rotation of the heating elements must be avoided. Failure to observe this rule will lead to the immediate destruction of the sensitive heating elements.

Pos: 151 /TD/Ersatz-/Verschleißteile/Werkzeuge (wird benötigt für den Austausch der Heizelemente - LHT-Ofen) - 1 @ 3\mod_1189492523638_51.doc @ 21299

Tools

To change the heating elements, you will need the following tools:

1 2 3 4 5 6

Fig. 27: Tools


1 – Sharp knife 2 – Heating element pliers 3 – Needle-nose pliers 4 – Allen wrench (supplied with furnace) 5 – Open-end wrench (SW 7) 6 – Slotted screwdriver


Exhaust air pipe First slacken the screws (A) from the exhaust air pipe guard plate using the enclosed Allen key. Lift the guard plate (B) from the exhaust air pipe and then carefully pull the exhaust air pipe (C) out straight upwards. Store the exhaust air pipe in a safe place, as its material is very sensitive.


Pos: 153 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 154 /TD/Ersatz-/Verschleißteile/Ofendeckel LHT-Elevatorofen LB/LBR - Demontage - 3 @ 4\mod_1208157145315_51.doc @ 35445

Removing the Furnace Lid

Undo the screws (A) on the lid using the supplied Allen wrench and pull up the lid to remove (B).


Pos: 155 /TD/Ersatz-/Verschleißteile/Federklammer und Breitbandkabel am LHT-Elevatorofen LB/LBR - 4 @ 4\mod_1208355501640_51.doc @ 35623

Clamps and Connector Contact/Connector Bridge

Carefully grip the clamps with the heating element pliers and pull up. Remove the connector contact or connector bridge from the heating element from above.

Fig.30: Clamps and connector contact

Pos: 156 /TD/Ersatz-/Verschleißteile/Thermoelement/Thermohalteblech demontieren LHT-Elevatorofen LB/LBR - 5 @ 4\mod_1208356258145_51.doc @ 35639

Heating element li

Connector contact/

Clamp

Heating l t

A B

A B C


Removing the Thermocouple/Thermocouple Retainer Remove the screw on the thermocouple retainer. Pull up and remove the thermocouple and the thermocouple retainer and carefully place on a soft surface away from the edge of the furnace.

Fig.31: Removing the thermocouple/thermocouple retainer

Pos: 157 /TD/Ersatz-/Verschleißteile/Deckenisolierung demontieren LHT-Elevatorofen LB/LBR - 6 @ 4\mod_1208357485293_51.doc @ 35655

Removing the Roof Retainer Remove the screws and the roof retainer from the roof insulation.

Fig. 32: Removing the roof retainer



Pos: 159 /TD/Ersatz-/Verschleißteile/Deckenisolierung abnehmen LHT-Elevatorofen LB/LBR - 7 @ 4\mod_1208358070016_51.doc @ 35671

Removing the Roof Insulation

Push the previously removed exhaust air tube into the center of the roof insulation from below. Carefully pull on the other end of the exhaust air tube to pull off the roof insulation along with the heating elements. Be careful of the surrounding cables.

Fig. 33: Roof insulation

Pos: 160 /TD/Ersatz-/Verschleißteile/Heizelemente austauschen LHT-Elevatorofen LB/LBR - 7.1 @ 4\mod_1208413757671_51.doc @ 35693

Replacing the Heating Elements

Carefully remove the hex screws (SW 7) on the element holders. Avoid loading or twisting the heating elements. Use pliers to prevent the element holder from twisting. Carefully pull the heating elements downward and remove. Clean the heating chamber and the feedthrough holes (vacuum). We recommend use of a cylindrical support or, for the LHT ../.. LBR, the retort as an installation aid.

Fig. 34: Removing the heating elements

Secure the element holder additionally using pliers.

Element holder

Heating element

Cylindrical support or retort (LBR model)

Exhaust air tube


Inserting the Heating Elements Carefully insert new heating elements from below, thereby ensuring that you do not press the heating element rods together. Warning: Make sure that the installation height is correct! Please refer to the sketch. An installation support (e.g., foam material) between the heating elements and the furnace floor is useful for this.

Fig. 35: Installing the new heating elements

Pos: 161 /TD/Ersatz-/Verschleißteile/Montage der Heizelemente am LHT../.. - Ofen (Tischmodell) - 8 @ 3\mod_1189494910321_51.doc @ 21406

Assembling the heating elements

Place element holder onto ends of heating element. Carefully tighten the hexagonal screws (WAF 7) of the element holders; the screw heads must point outwards. Any strain on or rotation of the heating element must be avoided. The element must be secured with pliers to prevent rotation. Position connection contact or connection bridge onto heating element ends and secure with new clamps, making sure these are positioned correctly to each other. Element holders, screws, spring clamps and cables must be properly checked.

Fig. 36: Assembly Additionally secure element holder with pliers


Installing the Furnace Lid

Attach the lid (A) and fasten it with the previously removed screws. Ensure that the lid is positioned properly (missing exhaust air openings in the lid point backward in the direction of the switchgear).

Clamp

Heating element pliers

Heating element end

Connection contact Element holder

Sketch

2 mm








Commissioning


Pos: 165 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Vergessen Sie nicht die Montageauflage/Montagehilfe aus dem Ofen zu entfernen. @ 3\mod_1190010794387_51.doc @ 21835

Note

Do not forget to remove the assembly support/assembly aid from the furnace chamber.

Pos: 166 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - *) = liegt der Ersatzteillieferung bei. @ 3\mod_1190010537840_51.doc @ 21823

Note

*) = Enclosed with spare part delivery.

Pos: 167 /TD/Ersatz-/Verschleißteile/Überschrift - Thermoelement austauschen @ 2\mod_1186579569245_51.doc @ 20769

A B C

A B


8.2 Replacing the Thermocouple Pos: 168 /TD/Ersatz-/Verschleißteile/Warnung - Gefahren durch elektrischen Strom - für alle Öfen @ 3\mod_1189491390787_51.doc @ 21273



Pos: 169 /TD/Ersatz-/Verschleißteile/Vorsicht - Beschädigung von Bauteilen! Thermoelement austauschen @ 3\mod_1189492921935_51.doc @ 21312

Caution - damage to components!

Thermocouples are extremely sensitive to breakage. Any strain on or rotation of the thermocouples must be avoided. Failure to observe this rule will lead to the immediate destruction of the sensitive thermocouples.

Pos: 170 /TD/Ersatz-/Verschleißteile/Werkzeuge (wird benötigt für den Austausch der Thermoelemente - LHT-Ofen) - 1 @ 3\mod_1189500851350_51.doc @ 21445

Tools

To change the thermocouple, you will need the following tools:

1 2 3

Fig. 39: Tools


Exhaust air pipe First slacken the screws (A) from the exhaust air pipe guard plate using the enclosed Allen key. Lift the guard plate (B) from the exhaust air pipe and then carefully pull the exhaust air pipe (C) out straight upwards. Store the exhaust air pipe in a safe place, as its material is very sensitive.


Pos: 172 /TD/Ersatz-/Verschleißteile/Ofendeckel LHT-Elevatorofen LB/LBR - Demontage - 3 @ 4\mod_1208157145315_51.doc @ 35445

A B C

1 – Allen wrench (supplied with furnace) 2 – Slotted screwdriver 3 – Phillips screwdriver


Removing the Furnace Lid Undo the screws (A) on the lid using the supplied Allen wrench and pull up the lid to remove (B).


Pos: 173 /TD/Ersatz-/Verschleißteile/Thermoelement austauschen am LHT../.. - Ofen (Tischmodell) -Demontage - 4 @ 3\mod_1189501003937_51.doc @ 21458

Replacing the thermocouple

First slacken the two screws (A) from the thermocouple connection. Slacken screw (B) from thermocouple retaining plate and pull thermocouple out upwards. Push a new thermocouple carefully into the thermocouple channel (C) and assemble and connect in reverse order. Attention must be paid to the correct polarity of the electrical connections (D) *).

Fig. 42: Replacing the thermocouple

Pos: 174 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Die Anschlüsse der Verbindungsleitungen vom Thermoelement zum Regler sind mit + und - @ 3\mod_1190123241249_51.doc @ 21916

Note *) The connections of the connecting lines from the thermocouple to the controller are labeled with and . It is absolutely essential to observe the correct polarity.

to to


Installing the Furnace Lid Attach the lid (A) and fasten it with the previously removed screws. Ensure that the lid is positioned properly (missing exhaust air openings in the lid point backward in the direction of the switchgear).

++ + - -

-

A

B

C D

A B








Commissioning


Pos: 178 /=== Seitenumbruch === @ 0\mod_1158819844943_0.doc @ 2983 Pos: 179 /TD/Allgemeine Hinweise (für alle Anleitungen)/Warnung - Arbeiten an der Ausrüstung dürfen nur von qualifiziertem und befugtem Fachpersonal @ 3\mod_1195208364876_51.doc @ 27757


Work on the equipment may only be performed by qualified, authorized specialists. During work, the voltage supply to the furnace/switching system must be switched off to prevent unintentional commissioning (disconnect mains power connector) and all moving parts of the furnace must be secured. Observe BGV A3 or corresponding national guidelines of the country of use. Wait until the furnace chamber and attaching parts have cooled to room temperature.

Pos: 180 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - In Deutschland ist die allgemeine Unfallverhütungsvorschriften VBG bzw. BGZ zu beachten. @ 3\mod_1193667801739_51.doc @ 26122

Note

In Germany, the general accident protection guidelines of VBG or BGZ must be observed. The national accident prevention regulations of the country of operation apply.


A B C

A B


Pos: 182 /TD/Ersatz-/Verschleißteile/Überschrift - Isolierung reparieren @ 2\mod_1186579778469_51.doc @ 20782

8.3 Repairing the Insulation Pos: 183 /TD/Ersatz-/Verschleißteile/Bei Schäden an der Isolierung - LHT- und Rohröfen @ 3\mod_1190127300968_51.doc @ 21928

The insulation of the furnace consists of a very high-quality refractory material. Heat expansion may cause tears in the insulation even after a few heating cycles. However, these have no affect on the function or quality of the furnace. However, if entire "sections" of the insulation come loose, Nabertherm Service must be notified.

Pos: 184 /TD/Zubehör/Überschrift - Zubehör (Optionen) @ 2\mod_1184078674990_51.doc @ 19536

9 Accessories (Options) Pos: 185 /TD/Zubehör/Überschrift - Labor-Begasungsstation @ 2\mod_1186578942952_51.doc @ 20743

9.1 Laboratory Gas Supply Station Pos: 186 /TD/Zubehör/Labor-Begasungsstation am LHT-Ofen @ 3\mod_1189518627524_51.doc @ 21475

Gas supply panel (single panel) for simple protective gas applications.

Gas supply panel (double panel) for operation with two noncombustible gas types.

Fig. 45: Laboratory gas supply stations

Gas supply stations are designed for commercial use in the laboratory field. Various equipment packages are available to upgrade the Nabertherm furnaces for operation with noncombustible gases. The various equipment packages can be supplied together with the furnace, but can also be subsequently delivered. Gas supply panels can be purchased with manual or automatic operating functions. Gas supply systems for noncombustible protective gas (argon Ar, nitrogen N2 and forming gas N2H2 95/5) are available, with shutoff valve, flow meter and control valve.

Pos: 187 /TD/Zubehör/Überschrift - Temperaturwählbegrenzer @ 3\mod_1190212914589_51.doc @ 21959

9.2 Over-temperature Limit Controller Pos: 188 /TD/Zubehör/Temperaturwählbegrenzer 2208i @ 3\mod_1190211167557_51.doc @ 21947

Over-temperature limit controller with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as over-temperature protection for the furnace and molten material. If the furnace temperature exceeds the set value, the heating is switched off to protect the furnace. The red LED alarm lights up on the over-temperature limit controller. Once the temperature has fallen below the set value again, the RESET button on the over-temperature limit controller must be pressed to continue operation, so that the heating is enabled.

Fig. 46: Over-temperature limit controller Eurotherm 2108i

Pos: 189 /TD/Allgemeine Hinweise (für alle Anleitungen)/Hinweis - Beschreibung und Funktion siehe zusätzliche Bedienungsanleitung @ 4\mod_1196844584314_51.doc @ 28447

Note See additional operating instructions for description and function



Pos: 191 /TD/Service/Nabertherm-Service @ 0\mod_1158658915997_51.doc @ 2861

10 Nabertherm Service

For the maintenance and repair of the system, the Nabertherm Service department is available at any time.

If you have questions, problems, or desires, please contact Nabertherm GmbH. In writing, by telephone, or through the Internet.

In writing

Nabertherm GmbH

Bahnhofstrasse 20

28865 Lilienthal/Germany

By telephone or fax

Phone: +49 (4298) 922-0

Fax: +49 (4298) 922-129

Internet or email

www.nabertherm.com

[email protected]

When making contact, please have the type plate data of the furnace or controller ready.

Pos: 192 /TD/Service/Typenschild und Daten für LHT-Öfen @ 2\mod_1185281327513_51.doc @ 20409

Fig. 47: LHT furnace type plate



Pos: 194 /TD/Außerbetriebnahme_Demontage_Lagerung_Rücktransport/Überschrift - Außerbetriebnahme, Demontage und Lagerung @ 0\mod_1167838295210_51.doc @ 5580

11 Decommissioning, dismounting, and storage Pos: 195 /TD/Außerbetriebnahme_Demontage_Lagerung_Rücktransport/Außerbetriebnahme ... vom Betreiber zu Ergänzen - 1 @ 0\mod_1158677947766_51.doc @ 2921

To be completed by the operator When decommissioning the system, the following safety instructions must absolutely be followed - this will avoid life-threatening injury, property damage, and environmental damage.

The decommissioning of the system may only be performed by authorized experts.

Disposal of the following materials/system parts will be performed by:

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

Before dismounting for recycling or scrap, oils and other ground-water damaging materials must be completely removed.

Be sure to dispose of materials, lubricants, and auxiliary materials in an environmentally responsible manner. The regulations for proper recycling or disposal must be observed.

The system may only be lifted at the holding points provided.

To lift the system or system parts, only the specified loadbearing and binding accessories may be used.

To select suitable loadbearing systems, a total weight of ___________kg must always be assumed.

During removal, note that a permitted floor load of at least ___________kg/m² must be expected.

Before removal, the following securing accessories must be attached:

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

Note Read the chapters on "Safety" and "Transport".

Pos: 196 /TD/Außerbetriebnahme_Demontage_Lagerung_Rücktransport/Hinweise für den Rücktransport der Ofen-Anlage @ 4\mod_1202459053863_51.doc @ 30918


Transportation/Return

The furnace should be sent in the original packaging, if you still have it.

Otherwise: Use sufficiently stable packaging. Packages are often piled up, bumped against other objects, and dropped during transportation; the package serves as an outer protective layer for your furnace.

+45°C

-5°C

- All lines and containers (e.g., cooling water) must be emptied prior to transportation/return. Pump off operating materials and dispose of them suitably.

- Do not expose the furnace to extreme cold or heat (direct sunlight). Storage temperature: -5°C to 45°C (-23°F to 113°F) Air humidity: 5% to 95%, noncondensing

- Place the furnace on a level surface to prevent distortion.

- Packaging and transport work may only be performed by qualified, authorized personnel.

If your furnace was equipped with load-securing devices (see section entitled "Load Securing"), please use them. Otherwise, the following rule generally applies: Fix and secure (with tape) all moving parts; provide extra cushioning for any protruding parts and protect them from breaking off.

Protect your electronic device from penetration by moisture or loose packaging materials.

Fill the empty space inside the package with soft but sufficiently strong filler materials (e.g., foam mats), and ensure that the device cannot move inside the package.

If the product is damaged during return due to improper packaging or due to violation of any other obligation by you, the costs must be borne by the customer.

As a rule, the following applies: The furnace is shipped without accessories unless the technician explicitly requests them.

Please enclose a detailed description of the fault(s) with the furnace - this will save time for the technician and hence costs for yourself.

Please don't forget the name and telephone number of a contact for questions.

Note

Returns may only be made according to the transportation instructions given on the packaging or in the transportation documents.

Note

The costs of transportation to and from the site for repairs that are not covered by the warranty shall be paid by the customer.



Pos: 198 /TD/Anhang/Überschrift - Konformitätserklärung @ 2\mod_1186581095030_51.doc @ 20795

12 Declaration of Conformity Pos: 199 /TD/Anhang/Konformitätserklärung-LHT-Hochtemperatur-Elevatorofen LB/LBR @ 4\mod_1208422860284_51.doc @ 35751



Pos: 201 /TD/Glossar/Überschrift - Glossar @ 0\mod_1167838408578_51.doc @ 5589 Pos: 204 /TD/Notizen/Für Ihre Notizen @ 0\mod_1157544056930_51.doc @ 1725

13 For Your Notes

===== Ende der Stückliste =====


Documents

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