Nabertherm LHT 17 LB, LHT 17 LB Speed, LHT 01/17, LHT 01/17 LB Speed, LHT 02/17 LB Speed Original Instructions Manual

...

Operating Instructions

High-Temperature Bottom Loading Furnaces

LHT ../17 LB LHT ../17 LB Speed

M01.0086 ENGLISCH

Original instructions

www.nabertherm.com

 Made

 in

 Germany

 Copyright by Nabertherm GmbH Bahnhofstrasse 20 28865 Lilienthal Federal Republic of Germany

Reg: M01.0086 ENGLISCH Rev: 2017-12

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 Overview of the Complete Furnace ................................................................................................................... 8

1.3 Safeguarding against Dangers from Excess Temperatures ............................................................................. 10

1.4 Key to the Model Names ................................................................................................................................. 11

1.5 Scope of Delivery ............................................................................................................................................ 11

2 Specifications ....................................................................................................................................................... 12

3 Warranty and Liability ....................................................................................................................................... 14

4 Safety .................................................................................................................................................................... 14

4.1 Defined Application ........................................................................................................................................ 14

4.2 Requirements for the Furnace Operator .......................................................................................................... 16

4.3 Requirements for the Operating Personnel ...................................................................................................... 17

4.4 Protective Clothing .......................................................................................................................................... 18

4.5 Basic Measures During Normal Operation ..................................................................................................... 19

4.6 Basic Measures in Case of Emergency ........................................................................................................... 19

4.6.1 What to Do in an Emergency ...................................................................................................................... 19

4.7 Basic Measures for Servicing and Maintenance.............................................................................................. 20

4.8 Environmental Regulations ............................................................................................................................. 21

4.9 Explanation of the Symbols and Warnings ..................................................................................................... 22

4.10 General Risks with the Furnace....................................................................................................................... 25

5 Transportation, Installation and Initial Start-Up ............................................................................................. 27

5.1 Delivery ........................................................................................................................................................... 27

5.2 Unpacking ....................................................................................................................................................... 29

5.3 Transport Securing Device/Packaging ............................................................................................................ 32

5.4 Constructional and Connection Requirements ................................................................................................ 32

5.4.1 Installation (Furnace Location) ................................................................................................................... 32

5.5 Assembly, Installation, and Connection .......................................................................................................... 35

5.5.1 Venting Exhaust Fumes .............................................................................................................................. 35

5.5.2 Connecting the Furnace to the Power Supply ............................................................................................. 36

5.5.3 Placing the Insulation in the Base Shell of the Lift Bottom ........................................................................ 37

6 Initial Start-Up .................................................................................................................................................... 38

6.1 Recommendations for Heating Up the Furnace for the First Time ................................................................. 39

7 Operation ............................................................................................................................................................. 42

7.1 Controller ........................................................................................................................................................ 42

7.2 Operation, Display and Switch Elements (depending on design) ................................................................... 42

7.2.1 Turning on the Controller/Furnace ............................................................................................................. 42

7.2.2 Turning off the Controller/Furnace ............................................................................................................. 43

8 Pre-Set Programs................................................................................................................................................. 43

8.1 Pre-Set Programs for Furnace Models with Speed Function........................................................................... 43

8.2 Pre-Set Programs for Furnace Models with and without Speed Function ....................................................... 47

8.2.1 Over-Temperature Limiter with Manual Reset and Adjustable CutoutTemperature (Additional Equipment)

.................................................................................................................................................................... 49

8.3 Loading/Charging ........................................................................................................................................... 50

8.4 Stackable Saggar ............................................................................................................................................. 51

9 Servicing, Cleaning, and Maintenance .............................................................................................................. 54

9.1 Furnace Insulation ........................................................................................................................................... 55

9.2 Shutting the System Down for Maintenance ................................................................................................ ... 55

9.3 Separate the Snap-In Coupling (Plug) from the Furnace Housing .................................................................. 56

9.4 Regular Maintenance of the Furnace ............................................................................................................... 56

9.5 Regular Maintenance Tasks – Electrical Testing ............................................................................................ 58

9.6 Regular Maintenance Tasks – Documentation ................................................................................................ 58

9.7 Checking the Heating Element Screws ........................................................................................................... 59

9.8 Cleaning Products ........................................................................................................................................... 61

10 Malfunctions ........................................................................................................................................................ 62

10.1 Error Messages of the Controller .................................................................................................................... 63

10.2 Warnings of the Controller .............................................................................................................................. 65

10.3 Malfunctions of the Switchgear ...................................................................................................................... 67

10.4 Controller Check List ...................................................................................................................................... 68

10.5 Lowering the Lift Unit - Emergency Hole ...................................................................................................... 70

11 Spare Parts/Wearing Parts ................................................................................................................................. 72

11.1 Electrical Schematics/Pneumatic Schematics ................................................................................................. 77

11.2 Removing and Installing Heating Elements .................................................................................................... 77

11.2.1 Tightening Torque for Screw Connections on Heating Elements .......................................................... 82

11.3 Replacing a Thermocouple .............................................................................................................................. 82

11.4 Repairing the Insulation .................................................................................................................................. 85

11.4.1 Replacing the Collar Insulation .............................................................................................................. 85

11.5 Separate the Snap-In Coupling (Plug) from the Furnace Housing .................................................................. 86

12 Accessories (Options) .......................................................................................................................................... 86

12.1 Electrical Schematics/Pneumatic Schematics ................................................................................................. 87

13 Nabertherm Service............................................................................................................................................. 87

14 Shut-Down, Dismantling, and Storage............................................................................................................... 88

14.1 Transportation/Return Transportation ............................................................................................................. 89

15 Declaration of Conformity .................................................................................................................................. 90

16 For Your Notes .................................................................................................................................................... 91

Note

These documents are intended only for buyers of our products and may not be copied or disclosed to third parties without our written consent. (Law governing copyright and associated protective rights, German Copyright Law from Sept. 9, 1965)

Protective Rights

Nabertherm GmbH owns all rights to drawings, other documents and authorizations, also in case of applications for protective rights.

Note

All the figures in the instructions have a descriptive character; in other words, they do not represent the exact details of the furnace.

Note

The pictures contained in the instruction manual may contain inaccuracies in terms of the function, design and furnace model.

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1 Introduction

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Dear Customer,

Thank you for choosing a quality product from Nabertherm GmbH. You can be proud that you have chosen a furnace which has been especially tailored to suit

your manufacturing and production conditions. This product is characterized by

 professional workmanship  high performance due to its high efficiency  high-quality insulation  low power consumption  low noise level  simple installation  easy to maintain  high availability of spare parts

Your Nabertherm Team

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These electrically heated furnaces are a high-quality product which will give you many years of reliable service if they are properly cared for and maintained. One basic prerequisite is that the furnace is used the way it was designed to be used.

During development and production a high priority was placed on safety, functionality and economy.

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1.1 Product Description

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The electrically operated lift bottom simplifies charging of high-temperature furnaces considerably. The all-round heating inside the furnace ensures very even temperature distribution. The sinter material is placed in saggars made from technical ceramic material. Since the saggars can be stacked on top of each other, this guarantees a high degree of

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productivity. With the furnace model LHT 01/17, saggars can be stacked for charging on up to two

levels. With furnace model LHT 02/17, up to three levels. Low storage heat allows short process times. These high-temperature bottom loading

furnaces reach a maximum temperature of 1650 °C (3002 °F).

Furnace model LHT ../17 LB Speed

Because of their special heating elements, these models are ideal for sintering translucent zirconia. The electrically operated lift bottom simplifies charging of the furnace considerably. The all-round heating inside the furnace ensures very even temperature distribution. The furnaces also have a forced cooling feature. To cool the furnace, it is opened gradually by the controller in relation to the program. Depending on the charge and the saggar, overall cycle times of less than two hours can be achieved with this hightemperature furnace.

Other Characteristics of this Product are:

 Tmax 1650 °C (3002 °F)  High quality molybdenum disilicide heating elements offer the best possible

protection against chemical interactions between the charge and the heating elements

 Only insulation materials that are not classified as carcinogenic according to

TRGS 905, Class 1 or 2 are used

 Outstanding temperature uniformity due to the all-round heating inside the furnace  Precise, electric tooth belt drive of the lift bottom with button controls; the furnace can

be opened automatically for forced cooling

 Housing made of sheets of textured stainless steel  Exhaust air opening in the roof  Type S thermocouples  Controller P480  Equipped with an optional drying function. At the start of the program, the bottom

moves to the drying position and closes automatically at 500 °C (932 °F)

 Delivery includes a starter set saggar for charging zirconia work (starter set included

with delivery of model LHT ../17 LB Speed)

Additional Equipment

 Over-temperature limiter with adjustable cutout temperature for thermal protection

class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

 Process control and documentation via VCD software package for monitoring,

documentation and control

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 Ethernet interface for VCD monitoring software

Accessories

 Stackable charge saggars for multilevel loading

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1.2 Overview of the Complete Furnace

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Fig. 1: Complete overview: The figure shows a model with over-temperature limiter and Ethernet interface as accessories (similar to picture)

No.

Name

Exhaust air tube

Thermocouple type S

Oven chamber

Heating elements made from molybdenum disilicide

Rectangular saggar with lid for model LHT 01/17

Round saggar with spacer ring for model LHT 02/17

Collar insulation

Lift bottom with floor insulation

Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as a temperature limiter to protect the furnace and the load (accessory)

Rocker switch to control the lift bottom

Controller P480

USB interface

Fan

Power switch (ON/OFF)

Ethernet interface (accessory)

Power plug with snap-in coupling

Rectangular saggars

For optimum utilization of the furnace chamber, the material is placed in ceramic saggars. Saggars can be stacked in several levels, depending on the furnace model. The saggars have slits to allow the air to circulate. The top saggar should be closed with a ceramic lid.

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Accessories

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Furnace model LHT 01/17

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(Starter set included with delivery of model LHT ../17 LB Speed)

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Fig. 2: Rectangular saggar with lid (similar to picture)

Round saggar

Saggars are recommended when working with zirconium oxide. A saggar consists of the sintering bowl as the bottom part and the spacer ring with ventilation openings. The material is very resistant to temperature changes and can also be used with short heating and cooling times.

DANGER

• Danger caused by incorrectly entered cut-off temperature at the over-temperature limiter/over-temperature limiter with motor driven reset

• Risk of fatal injury

• If, as a result of over-temperature from the charge and/or the

operating equipment, a charge is likely to be damaged at this preset cut-off temperature of the over-temperature limiter/overtemperature limiter with motor driven reset, or if the charge itself becomes a source of danger for the furnace or its surroundings, the cut-off temperature must be reduced on the over-temperature limiter/over-temperature limiter with motor driven reset to the maximum permissible value.

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Furnace model LHT 02/17

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(Starter set included with delivery of model LHT ../17 LB Speed)

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Fig. 3: Round saggar (similar to picture)

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1.3 Safeguarding against Dangers from Excess Temperatures

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Over-temperature limiters and over-temperature limiters with automatic reset to protect against over-temperature in the furnace are available for Nabertherm GmbH furnaces either as a standard feature (depending on the model series) or as additional equipment (customized design).

Over-temperature limiters and over-temperature limiters with automatic reset monitor the furnace temperature. The display shows the most recently set cut-off temperature. If the furnace temperature rises above the pre-set cut-off temperature, the heating is shut down to

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protect the furnace, the charge and/or the operating equipment.

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Read the operating instructions of the over-temperature limiter/over-temperature limiter with automatic reset before starting the furnace. The safety sticker must be removed from the over-temperature limiter/over-temperature limiter with automatic reset. When a change is made in the heat treatment program, the maximum permissible cut-off temperature (alarm trigger temperature) on the over-temperature limiter/over-temperature limiter with

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automatic reset must be checked or re-entered. Depending on the physical characteristics of the furnace, we recommend that you set the

maximum target temperature of the heating program in the controller between 5 °C and 30 °C below the trigger temperature of the over-temperature limiter/over-temperature limiter with automatic reset. This prevents unwanted triggering of the over-temperature limiter/over-temperature limiter with automatic reset.

Description and function, see the Operating Instructions of the overtemperature limiter/over-temperature limiter with automatic reset.

Example

Explanation

LHT 01/17 LB

LHT = Laboratory High-Temperature bottom loading furnace tabletop model

LHT 01/17 LB

01 = 1-liter furnace chamber (volume in liters) 02 = 2-liter furnace chamber (volume in liters)

LHT 01/17 LB

17 = Tmax 1650 °C (3002 °F)

LHT 01/17 LB

LB = Lift Bottom

LHT 01/17 LB Speed

Speed = Model is equipped with forced cooling

System components

Quantity

Comment

High-temperature bottom loading furnace

1 x

Nabertherm GmbH

Allen key

1 x

Nabertherm GmbH

Saggar (starter set), rectangular or round depending on furnace model

1)5)

1 x

Nabertherm GmbH

Power cable1)

1 x

Nabertherm GmbH

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Fig. 4: Removing the sticker (similar to picture)

1.4 Key to the Model Names

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Fig. 5: Example model designation (type plate)

1.5 Scope of Delivery

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The scope of delivery includes:

System components

Quantity

Comment

Process documentation VCD software package2

1 x

Nabertherm GmbH Other components, variable depending on the

model

- - -

See shipping documents

Document type

Quantity

Comment

Instruction manual for high-temperature bottom loading furnace

1 x

Nabertherm GmbH Operating manual for controller

1 x

Nabertherm GmbH

Operating manual for over-temperature limiter1)

1 x

Nabertherm GmbH

Operating instructions for VCD software package2)

1 x

Nabertherm GmbH

Other documents, variable depending on the particular design

1 x

Note

Store all documents carefully. All the functions of this furnace were tested during manufacturing and prior to shipping.

Note

The documents included do not always contain the electrical schematics and pneumatic diagrams.

If you need the respective diagrams, they can be ordered from Nabertherm Service.



Electrical specifications are on the type plate located on the side of the furnace.

Model

Tmax

Inner dimensions

in mm

Outer dimensions

in mm

Work space in mm (corresponds to saggar

with spacer 20 mm above the floor)

°C w d h W D H

w1 Ø d1

LHT 01/17 LB

1650

145

180

100

350

590

680

75 110

LHT 02/17 LB

1650

185

180

185

390

590

765

115 105

LHT 01/17 LB Speed

1650

145

180

100

350

590

680

75 110

LHT 02/17 LB Speed

1650

185

180

185

390

590

765

115 105

Betriebsanleitung

Made in Germany

Prozessdokumentation

Controltherm MV

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2 Specifications

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included with delivery depending on design/furnace model

included with delivery if required, see shipping documents

quantity depends on furnace model

quantity as required, see shipping documents

starter set included with delivery of model LHT ../17 LB Speed

Model

Volume

Weight

Minutes to Tmax

Area of lift bottom

Maximum

units

in L

in kg

LHT 01/17 LB

130

LHT 02/17 LB

135

LHT 01/17 LB Speed

130

LHT 02/17 LB Speed

135

Model

Electrical

Connection:

Voltage

Electric current

Connected

load

Frequency

in V

in A

in Hz

LHT 01/17 LB

1-phase: (1/N/PE)

220 - 240

9.7

2.2

50/60

LHT 02/17 LB

1-phase: (1/N/PE)

220 - 240

15.5

3.4

50/60

LHT 01/17 LB Speed

1-phase: (1/N/PE)

220 - 240

9.7

2.2

50/60

LHT 02/17 LB Speed

1-phase: (1/N/PE)

220 - 240

15.5

3.4

50/60

Thermal protection class

Furnaces:

according to DIN EN 60519-2

without safety controller: Class 0 with safety controller: Class 2

Protection type

Furnaces

IP20

Ambient conditions for electrical equipment

Temperature: Humidity:

+5 °C to + 40 °C max. 80% non-condensing

Weights

Furnace with accessories

Depends on design (see shipping documents)

Emissions

Continuous sound pressure level:

< 80 dB(A)

h H d w w2

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Fig. 6: Dimensions

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As regards warranty and liability, the normal Nabertherm warranty terms apply, unless individual terms and conditions have been agreed. However, the following conditions also apply:

The Nabertherm furnace was designed and built in conformance with a careful selection of the applicable harmonized standards and other technical specifications. Hence, it corresponds to the state of the art and assures the greatest degree of safety.

Only materials whose characteristics and melting temperatures are known may be heated. Consult any available safety-related material data sheets.

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3 Warranty and Liability

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Warranty and liability claims for personal injury or damage to property shall be excluded if they are attributable to one or more of the following causes:

 All persons involved in operation, installation, maintenance, or repair of the furnace

must have read and understood the operating instructions. No liability will be accepted for damage or disruption to operation resulting from non-compliance with the operating instructions.

 Not using the furnace as intended  Improper installation, start-up, operation, or maintenance of the furnace,  Operation of the furnace with defective safety equipment or improperly installed or

non-functioning safety and protective equipment

 Not observing the information in the operating instructions with respect to

transportation, storage, installation, start-up, operation, maintenance, or equipping the furnace

 Making unauthorized changes to the furnace  Making unauthorized changes to the operating parameters  Making unauthorized changes to the parameterization, the settings, or the program  Nabertherm accepts absolutely no liability for damage caused by using parts that are

not original Nabertherm parts. Original parts and accessories are designed especially for Nabertherm furnaces. Replace parts only with original Nabertherm parts. Otherwise the warranty will be void.

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 Catastrophes due to third-party causes and force majeure

4 Safety

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4.1 Defined Application

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Furnaces in this series are suitable for sintering technical ceramic pieces such as bridges and crowns made of zirconium oxide.

The use of paint solvents can lead to accelerated wear of the heating elements. If solvents are used, good pre-drying is necessary to minimize their impact on the heating elements.

Note

The furnace must not be operated with explosive gases or mixtures or with explosive gases or mixtures that form during the process. This furnace has no safety technology for processes in which combustible mixtures can form, such as debinding. If the furnace is to be used for such processes, the concentration of organic gases must never exceed 3 % of the lower explosive limit (LEL) in the furnace. This requirement not only applies to normal operation, but also especially to exceptions, such as process malfunctions (e.g. due to the breakdown of a unit, etc.). Ensure adequate extraction and ventilation of the furnace.

Nabertherm offers a wide range of furnaces that were especially developed for processes with flammable gases.

Operation with power sources, products, operating equipment, auxiliary materials, etc., which are listed as hazardous or which may in any way harm the health of the operator is prohibited.

The furnace must not be filled with materials or substances that release explosive gases or vapors. Only materials and substances whose properties are known may be used.

Caution

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

- This furnace was designed for commercial use. The furnace is not designed

for heating food, animals, wood, grain, etc.

- The furnace must not be used to heat the workplace.

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

- Do not use the furnace as a clothes dryer.

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Pos: 55 /TD/Sicherheit/Überschrift - Nic ht bestimmungsgemäß ist: (Einzug Mitte) @ 80\mod_1418806747958_51.docx @ 347220 @ @ 1

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Pos: 58 /TD/Sicherheit/Bei Öfen mit T emperaturwählbegrenzer muss die Abschal ttemperatur so eingestellt werden ... @ 45\ mod_1377244417122_51.docx @ 2 42390 @ @ 1

Pos: 59 /TD/Sicherheit/Geht von der Charg e durch Übertemperatur die Gefahr aus , dass bei dieser voreingestellten ... TWB @ 53\mod_1389787246569_51.docx @ 262755 @ @ 1

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Improper furnace operation:

 Any other use, such as processing of products other than those for which the furnace

was intended as well as handling hazardous materials or materials dangerous to health is deemed IMPROPER and such uses must be approved in writing by Nabertherm.

 Under certain circumstances gases or materials may be released from the materials in

the furnaces that settle on the insulation or the heating elements and destroy them. If

applicable, read the labels and instructions on the packaging of materials that you use.

 Furnaces with over-temperature limit controllers must have their shut-down

temperatures set to prevent any overheating of the material.

 If as a result of excessive heat the batch is likely to be damaged by the pre-set cut-out

temperature of the over-temperature limit controller or that the batch itself becomes a source of danger for the furnace or its surroundings, the temperature setting on the over-temperature limit controller must be reduced to the maximum permissible value.

 The set-up instructions and safety regulations must be followed, otherwise the furnace

will be considered improperly used, effectively cancelling any claims against Nabertherm GmbH.

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Pos: 63 /TD/Allgemeine Hinweise (für all e Anleitungen)/Hinweis - Dieser Ofen ist für die gewerbliche Anwendung ... Der O fen ist nicht für die Erwärmung ... @ 19\ mod_1315980979500_51.docx @ 13454 8 @ @ 1

Caution

Applicable safety instructions are contained in individual chapters.

Note

Depending on use, wearing parts, such as heating elements and insulation material, can be subject to increased wear. Service life, the process, and the type of use are also dependent on the usage frequency and can, therefore, cause increased wear of heating elements and insulation material. Heating may discolor stainless steel sheet (especially if the furnace is opened while hot), but this does not impair the functionality of the furnace.

Note This product does not comply with the ATEX Directive and may not be used in

ignitable atmospheres. The system must not be operated with explosive gases or mixtures and it must be ensured that explosive gases or mixtures do not form during the process.

The set-up instructions and safety regulations must be followed, otherwise the furnace will be deemed to have been used improperly, effectively cancelling any claims against Nabertherm GmbH.

This level of safety when operating the furnace can be achieved only if all the necessary measures have been taken. It depends on the furnace operator's diligence in planning these measures and controlling how they are carried out.

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Pos: 68 /TD/Sicherheit/Das Öffnen des O fens im heißen Zustand über 200 °C (392 °F) kann zu einem erhöhtem Verschleiß . .. @ 39\mod_1364289911635_51.doc x @ 219945 @ @ 1

Pos: 69 /TD/Sicherheit/Dieser Ofen ist NICH T dafür bestimmt durch Personen (einschli eßlich Kinder) mit eingeschränkten ... @ 45\mod_1377501786408_51.docx @ 2 42490 @ @ 1

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The operator is liable for any resulting damages.

 The furnace may only be operated in the manner described in these operating

instructions, i.e., the operating instructions must be completely read and understood.

 The set-up instructions and safety regulations must be followed, otherwise the furnace

will be considered improperly used, effectively cancelling any claims against Nabertherm GmbH. The EC Declaration of Conformity will cease to be valid if any modifications are made to the machine without our approval.

 Only materials whose characteristics and melting temperatures are known may be

heated. Consult any available safety data sheets of the materials. Any other use beyond this is improper, including the processing of products other than those for which the furnace was intended as well as handling hazardous materials or materials dangerous to health, and must be approved in writing by the manufacturer Nabertherm GmbH.

 Opening the furnace while it is still hot, over 200 °C (392 °F), can lead to increased

wear of the following components: insulation, door seal, heating elements and furnace housing. No liability shall be accepted for any damage to the goods or the furnace resulting from non-compliance with this warning.

 This furnace is NOT used by certain persons (including children) with restricted

physical, sensorial or mental capabilities or who have insufficient experience and/or insufficient knowledge, unless they are supervised by a person who is responsible for their safety or are instructed in how to use the furnace. Children should be supervised to make sure that they do not play with the furnace.

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4.2 Requirements for the Furnace Operator

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Note

In Germany, the general accident protection guidelines must be observed. The accident prevention regulations applicable in the country where the furnace is installed must be observed.

All persons involved in operation, installation, maintenance, or repair of the furnace must have read and understood the operating instructions. No liability will be accepted for damage or disruptions to operation resulting from non-compliance with the operating instructions.

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The Operator must ensure that

 all harmful gases are removed from the workplace, for example by an extraction

system,

 the extraction system is switched on,  the workplace is properly ventilated,  the furnace is operated only in a perfect operating condition and, in particular, that the

functions of the safety components are checked regularly.

 the required personal protective equipment is available for and used by the operating,

maintenance, and repair personnel.

 these operating instructions, including the supplier documentation, are kept near the

furnace. These instructions must be available at all times for anyone working with or on the furnace;

 all the safety and operating instruction signs on the furnace can be read properly.

Damaged or unreadable signs must be replaced immediately,

 furnace personnel are informed regularly about all issues involving occupational

safety and environmental protection and are familiar with all the operating instructions, especially those involving safety,

 a risk assessment is carried out (in Germany, covered of the Occupational Safety Act)

to determine any other hazards that may result from the working conditions particular to the furnace's location,

 all other instructions and safety guidelines that have been determined in a risk

assessment for the workplace are compiled in an operation manual (in Germany, covered of the Ordinance Regulating the Use of Operating Equipment).

 Only sufficiently qualified and authorized personnel may operate, maintain and repair

the system. This personnel must be trained in how to operate the furnace and must confirm their participation in the training with a personal signature. The training program must be documented in detail. In case an operator is replaced, additional training must also take place. The additional training may only be performed by authorized, trained individuals familiar with the system. The additional training must be painstakingly documented and participation must be evidenced by the names and signatures of the participating employees.

The use of paint solvents can lead to accelerated wear of the heating elements. If solvents are used, good pre-drying is necessary to minimize their impact on the heating elements.

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4.3 Requirements for the Operating Personnel

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Only adequately qualified and authorized persons may operate, maintain, and repair the system. These personnel are informed regularly about all issues involving occupational safety and environmental protection and are familiar with all the operating instructions, especially those involving safety,

DANGER

• Danger caused by incorrectly entered cut-off temperature at the over-temperature limiter/over-temperature limiter with motor driven reset

• Risk of fatal injury

• If, as a result of over-temperature from the charge and/or the

Wear protective clothing

Wear a full face protection visor that is resistant to heat or splattering

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Only trained personnel may operate the control and safety equipment.

The Operator Should Complete these Details:

 Operator

_______________________________________________________________

 The furnace may only be transported by

_______________________________________________________________

 The furnace may only be installed by

_______________________________________________________________

 The furnace may only be commissioned by

_______________________________________________________________

 Initial instructions may only be given by

_______________________________________________________________

 Malfunctions may only be rectified by

_______________________________________________________________

 The furnace may only be maintained by

_______________________________________________________________

 The furnace may only be cleaned by

_______________________________________________________________

 The furnace may only be serviced by

_______________________________________________________________

 The furnace may only be repaired by

_______________________________________________________________

 The furnace may only be shut down by

_______________________________________________________________

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4.4 Protective Clothing

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Wear heat-resistant gloves to protect your hands.

Risks during Normal Operation!

Before switching the furnace on, check and ensure that only authorized persons are in the working area of the furnace and that no one can be injured as a result of operating the furnace.

Note

The power plug is to be pulled out to stop the furnace in case of an emergency. Therefore, the power plug must be accessible at all times when the furnace is operating so that it can be pulled out quickly in case of an emergency.

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4.5 Basic Measures During Normal Operation

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Before starting production each time, check and ensure that all the safety equipment works properly.

Before starting production each time, check the furnace for obvious damage and ensure that it is operated only in a perfect condition. Report any defects to a supervisor immediately.

Before starting production each time, remove all materials and objects that are not needed for production from the working area.

At Least once every Day (see also Servicing and Maintenance) Check the Following:

 Check the furnace for obvious external damage,  Check all hydraulic or pneumatic hoses, make sure that they are not leaking and that

they are connected properly (if applicable),

 Check all gas and oil lines, make sure that they are not leaking and that they are

connected properly (if applicable),

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 Check that the fan works properly (if applicable)

4.6 Basic Measures in Case of Emergency

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4.6.1 What to Do in an Emergency

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Fig. 7: Pull the power plug (similar to picture)

Risks during Normal Operation!

Switch the furnace off immediately in case of unexpected occurrences in the furnace (e.g. a lot of smoke or unusual smells). Wait until the furnace has cooled naturally to room temperature.

Warning - General hazards!

If unusual processes are occurring in the furnace (e.g., emission of heavy smoke or strong odors), do not open the furnace. Doing so creates a fire or explosion hazard. Wait until the furnace has naturally cooled down to room temperature.

Warning – Danger of Electric Shock!

Work on the electrical equipment may be done only by qualified, authorized electricians.

Maintenance work must be performed only by authorized persons, observing the maintenance instructions and the accident prevention regulations. We recommend that maintenance and repair work be carried out by the service team of Nabertherm GmbH. Non-compliance may cause injuries, death, or considerable damage to property.

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Pos: 92 /TD/Allgemeine Hinweise (für all e Anleitungen)/Warnung - Arbeiten an d er elektrischen Ausrüstung dürfen nur vo n ... @ 2\mod_1184228021019_51.doc x @ 19673 @ @ 1

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4.7 Basic Measures for Servicing and Maintenance

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Switch off the system and make sure it cannot be switched on again inadvertently (lock the main switch and secure it with a padlock), or pull out the power plug.

Clear an adequate area around the system to facilitate the repair work. Suspended loads are dangerous. Working beneath a suspended load is prohibited. There is a risk of fatal injury. Relieve the pressure on hydraulic and pneumatic equipment before carrying out maintenance or repair work. (if applicable).

When cleaning furnaces, control cabinets, or electrical equipment housings, never spray them with water.

When maintenance or repair work has been completed, before recommencing production

Note

The operator must ensure that national environmental regulations are observed.

ensure the following:

 Check that loosened screw connections have been re-tightened,  Reinstall protective equipment, screens, and filters,  Remove all material, tools, and other equipment used for the maintenance or repair

work from the working area of the system,

 Remove any liquids that have leaked,  Check that all safety functions (e.g. EMERGENCY STOP button) work properly,

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 Power cables may be replaced only with similar, approved cables  Check that the fan works properly (if applicable)

4.8 Environmental Regulations

Pos: 97 /TD/Sicherheit/Umweltschutz vorschriften Schmierfette-Hydrauliköl-Kühl mittel @ 0\mod_1158223424304_51.doc x @ 2199 @ @ 1

All statutory duties regarding waste avoidance, proper recycling, and disposal must be observed when work is carried out on and with the furnace.

Problem materials that are no longer needed, such as lubricants or batteries, must not be placed in normal waste disposal systems or allowed to enter the sewage system.

During installation, repair, and maintenance work, substances that are hazardous to water, such as

 lubricating grease and oils  hydraulic oils  refrigerants  solvent-based cleaning fluids must not be allowed to contaminate the soil or enter the

sewage system.

These substances must be stored, transported, collected, and disposed of in suitable containers.

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When it is delivered, this furnace contains no substances that make a hazardous waste classification necessary. However, residues of process materials may accumulate in the furnace insulation during operation. These may be hazardous to health and/or the environment.

 Dismantle the electronic components and dispose of them as electric scrap.  Remove the insulation and dispose of it as hazardous waste (see “Servicing, Cleaning,

and Maintenance with Ceramic Fiber Material”).

 Dispose of the housing as scrap metal.  Contact the responsible disposal company to dispose of the materials listed above.

Note

In the following operating instructions, specific warnings are given to draw attention to residual risks that cannot be avoided when the furnace is operating. These residual risks include dangers for humans/products/ the furnace, and the environment.

The symbols used in the operating instructions are especially intended to draw attention to safety information.

The symbols used cannot replace the text of the safety information. Therefore, always read the entire text.

Graphic symbols correspond to ISO 3864. In accordance with the American National Standard Institute (ANSI) Z535.6 the following warning information and words are used in this document:

The general hazard symbol, in combination with the words CAUTION, WARNING and DANGER warns about the risk of serious injury. Observe the following information to prevent injury or death.

NOTE

Refers to a hazard that could damage or destroy the equipment.

CAUTION

Refers to a hazard with a minor or medium risk of injury.

WARNING

Refers to a hazard that could cause death, serious or irreversible injury.

DANGER

Refers to a hazard that could directly cause death, serious or irreversible injury.

WARNING

• Type and source of the danger

• Consequences of non-compliance

• Action to prevent danger

Hazard Symbol Indicates the risk of injury

Signal Word Classifies the danger

Graphical Symbols (optional) According to ISO 3864:

Consequences, measures, and prohibitions

Reference Texts:

• Type and source of the danger

• Possible consequences of non-

compliance

• Measures/Prohibitions

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4.9 Explanation of the Symbols and Warnings

Structure of the Warning: All Warnings are Structured as Follows

DANGER

• Type and source of the danger

• Consequences of non-compliance

• Action to prevent danger

Note

Below this symbol you will find instructions and particularly useful information.

Rule - Rule Sign

This symbol draws attention to important rules that must be observed. Rule signs protect people against injury and show what is to be done in certain situations.

Rule – Important Information for Operators

This symbol draws the operator's attention to important information and operating instructions that must be observed.

Rule – Important Information for Maintenance Personnel

This symbol draws the maintenance personnel's attention to important operating and maintenance instructions (service) that must be observed.

Rule – Pull Out the Power Plug

This symbol tells the operator to pull out the power plug.

Graphical Symbols (optional) According to ISO 3864:

Consequences, measures, and prohibitions

Reference Texts:

• Type and source of the danger

• Possible consequences of non-compliance

• Measures/prohibitions

Graphical Symbols (optional) According to ISO 3864:

Instructions or prohibitions

Hazard Symbol Indicates the risk of injury

Signal Word Classifies the danger

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Information Symbols in the Instructions:

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Rule – Lift only with Several People

This symbol draws the personnel's attention to the fact that this device may only be lifted and moved to its final destination by several people.

Warning – Hot Surface, Do Not Touch

This symbol warns the operator that the surface is hot and should not be touched.

Warning – Danger of Electric Shock

This symbol warns the operator that there is a risk of an electric shock if the following warnings are not heeded.

Warning – Risk of Device Toppling Over

This symbol tells the operator that there is a risk of the device toppling over if the following warnings are not heeded.

Warning – Suspended Load

This symbol warns the operator of potential dangers of suspended loads. Working below a suspended load is strictly forbidden. Ignoring this can lead to fatal injury.

Warning – Danger if Heavy Loads are Lifted

This symbol warns the operator of the potential dangers of lifting heavy loads. Ignoring this can lead to injury.

Warning – Risk to the Environment

This symbol warns the operator of the risk to the environment if the following information is not heeded. The operator must ensure that national environmental regulations are observed.

Warning – Fire Danger

This symbol warns operators of the danger of fire if the following information is not followed.

Warning – Suffocation from Lack of Oxygen

This symbol warns the operator of the possibility of suffocating from lack of oxygen. Ignoring this can lead to suffocation

Warning – Risk of Explosive Substances or Explosive Atmosphere

These symbols warn the operator of explosive substances or an explosive atmosphere

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Pos: 107 /TD/Sicherheit/Sicherheitss ymbole/Warnhinweise-ISO-ANSI/Piktogram m in der Anleitung - Warnung - Heiße O berfläche - Oberfläche nicht berühren @ 9\ mod_1247054774780_51.docx @ 628 02 @ @ 1

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Prohibited – Important Information for Operators

This symbol warns the operator that water or cleaning products must NOT be poured over the objects. A high-pressure cleaning device must also not be used.

Warning – Hot Surface, Danger of Burning – Do Not Touch

You may not always realize that surfaces, such as furnace components, furnace walls, doors and materials, and even liquids are hot. Do not touch the surface.

Warning – Danger of Electric Shock!

Warning, dangerous electric voltage

Warning – General hazards

Risk of burning on the furnace housing Risk of burning on the exhaust tubes Risk of crushing from moving parts (lift bottom) Live parts contain dangerous electrical voltages. Operate the furnace only with fully installed and closed cover panels. No objects should be inserted into openings in the furnace housing, exhaust tubes or

cooling slits of the switchgear or furnace. Ignoring this warning can result in electric shock.

Risk of fire if using an extension cable:

If an extension cable or a power board is used, its maximum electrical load must not be exceeded. Do not operate the furnace with an extension cable if you are not sure if grounding is guaranteed.

Risk of crushing when the lift bottom is being lowered

Risk of burning at the exhaust tubes on the top of the furnace

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Pos: 120 /TD/Sicherheit/Überschrift - Allgemeine Gefahren an der Anlage @ 0\ mod_1168596796288_51.docx @ 6014 @ 2 @ 1

Warning Signs on the Furnace:

4.10 General Risks with the Furnace

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Warning – General Hazards

No objects may be placed or set down on the furnace or switchgear. There is a risk of fire or explosion.

Warning – Influence on Implants from Electromagnetic Fields

It can be assumed that there is no risk from electromagnetic fields. Deviating from this, there may be a risk for people with active implants (such as a pacemaker, insulin pump) and passive implants, as the function of the implant may be affected also with a field strength below the permissible threshold. Proper function must be ensured on the basis of the technical specifications of the implant through an individual assessment by a suitable expert (for example, an occupational physician).

DANGER

• Danger from electrocution

• If there is no earth connection, or the

earth connection is poorly connected, the result may be a deadly electrical shock.

• Do not insert any metallic objects such as thermocouples, sensors or tools into the furnace chamber without having previously ensured that the plant has been correctly earthed. Entrust the job of making a earth connection between the object and the furnace housing to a qualified electrical technician. Any objects inserted into the furnace must be inserted only through those openings intended for this purpose.

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DANGER

• Danger caused by incorrectly entered cut-off temperature at the over-temperature limiter/over-temperature limiter with motor driven reset

• Risk of fatal injury

• If, as a result of over-temperature from the charge and/or the

Risks during Normal Operation!

Suspended loads are dangerous. Working beneath a suspended load is prohibited. There is a risk of fatal injury.

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5 Transportation, Installation and Initial Start-Up

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5.1 Delivery

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Check that Everything is Complete

Compare the delivered items with the delivery note and the purchase order documents. Immediately notify the carrier and Nabertherm GmbH of any missing or damaged parts, as complaints at a later date cannot be acknowledged.

Danger of Injury

When the furnace is being lifted, parts of the furnace or the furnace itself could topple over, slip, or fall. Before the furnace is lifted, make sure no one is in the working area. Wear safety footwear and a hard hat.

Safety Instructions

 Forklifts must be operated only by authorized personnel. The operator bears sole

responsibility for safe operation and the load

 When the furnace is being lifted, make sure that the ends of the forks or the load do

not catch on neighboring goods. Use a crane to move tall parts, such as control cabinets.

 Use only lifting equipment with sufficient load-bearing capacity  Lifting gear must be attached only to positions that have been designated for this

purpose

 Attachments, piping, or cable conduits must never be used to affix lifting gear  Unpackaged parts should only be lifted with ropes or straps  Attach transportation equipment only to positions intended for this purpose.  Lifting and securing equipment must conform to the provisions contained in accident

prevention regulations

 Consider the weight of the furnace when choosing lifting and securing equipment.

(see Specifications)

 Stainless steel parts (including mounting elements) must always be kept separate from

unalloyed steel parts

 Do not remove corrosion protection until immediately prior to assembly

Note

Safety and accident prevention guidelines applicable for forklift trucks must be followed.

Description

Symbol

Explanation

Fragile

This symbol is to be attached to fragile goods. Goods marked like this are to be handled carefully and must not be thrown or tied up.

This side up

The freight must be transported, transshipped, and stored in such a way that the arrows point upward. The freight must not be rolled, folded, or stored on edge. However, the package does not have to be packed on top of other freight.

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Transportation with a Pallet Truck

Observe the maximum permitted capacity of the pallet truck.

1. Our furnaces are delivered ex works on wooden frames to facilitate unloading. Transport the furnace in its original packaging and with suitable equipment to prevent any damage. Remove the packaging only when the furnace is in its final location. When transporting the furnace, make sure it is secured against sliding, toppling over, and damage. The furnace should be transported and installed by at least two persons. Do not store the furnace in damp rooms or outdoors.

2. Push the pallet truck underneath the transportation frame. Make sure that the pallet truck is completely beneath the frame. Pay attention to neighboring goods.

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Fig. 8: Pallet truck is pushed completely beneath the transportation frame

3. Lift the furnace carefully and pay attention to its center of gravity. When the furnace is being lifted, make sure that the ends of the forks or the load do not catch on neighboring goods.

4. Make sure that the furnace is balanced safely; if not, attach securing equipment. Push the furnace carefully, slowly and with the pallet truck at its lowest position. Do not transport the furnace on inclines.

5. Carefully lower the furnace at its final position. Pay attention to neighboring goods. Try not to set it down too abruptly.

Symbols:

The symbols for handling packaging are defined in ISO R/780 (International Organization for Standardization) and in DIN 55 402 (German Institute for Standardization).

+ 64 hidden pages

Nabertherm LHT 17 LB, LHT 17 LB Speed, LHT 01/17, LHT 01/17 LB Speed, LHT 02/17 LB Speed Original Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual