Zhermack FURNACE D User manual

User Manual
Preheating furnaces
IT FR ES DE EN
furnace D

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GENERAL INDEX
CH. 1
INTRODUCTION
Pag. 115 1.1 How to read and use the manual
Pag. 116 1.2 Terminology and symbols
CH. 2
GENERAL INFORMATIONS
Pag. 117 2.1 Responsibility
Pag. 117 2.2 Warranty: general instruction
Pag. 117 2.3 Authorized personnel
Pag. 118 2.4 General safety regulations
CH. 3
DESCRIPTION OF THE EQUIPMENT
Pag. 120 3.1 General description of the equipment
Pag. 120 3.2 Table of the components
Pag. 121 3.2.1 Description of the components
Pag. 121 3.3 Control panel
Pag. 122 3.3.1 Description of control panel components
Pag. 122 3.4 Entering data
Pag. 123 3.5 Identification data
Pag. 123 3.5.1 On-equipment labels and symbols
CH. 4
TECHNICAL CHARACTERISTICS
Pag. 124 4.1 Technical characteristics and operating start
Pag. 124 4.1.1 Technical Data
Pag. 125 4.1.2 Standard accessories and accessories available on request
Pag. 125 4.2 Temperature tolerances
CH. 5
TRANSPORT AND MOUNTING
Pag. 126 5.1 Warning
Pag. 126 5.2 Packing and unpacking
Pag. 127 5.3 Transport and mounting
Pag. 128 5.4 Elimination / Dismantling
CH. 6
INSTALLATION AND FIRST-TIME USE
Pag. 129 6.1 Warnings and precautions
Pag. 129 6.2 Permitted ambient conditions
Pag. 129 6.3 Required work space
Pag. 130 6.3.1 Worktops
Pag. 131 6.4 Connecting up to the power supply
Pag. 131 6.4.1 Connecting up the aspiration unit (optional)
Pag. 132 6.5 Starting up the equipment
Pag. 133 6.6 Purpose of the equipment
Pag. 133 6.7 Improper and forbidden use

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CH. 8
MAINTENANCE
Pag. 140 8.1 Cleaning
Pag. 140 8.2 Routine maintenance
Pag. 141 8.3 Unscheduled maintenance
Pag. 141 8.4 Restarting after a long period of inactivity
Pag. 141 8.5 Requesting technical assistance
CH. 9
TROUBLESHOOTING
Pag. 142 9.1 Warning
Pag. 142 9.2 Problems, causes and remedies
APPENDICES
Pag. 144 A.1 CE Declaration of conformity
Pag. 145 A.2 Warranty certificate and identification form
Pag. 146 A.3 Maintenance and repair worksheet
Pag. 147 A.4 Authorized service partners
Pag. 147 A.5 Notes
The data given in this manual may be modified without prior notice.
CH. 7
USING THE EQUIPMENT
Pag. 134 7.1 Warning
Pag. 134 7.2 Safety system
Pag. 135 7.2.1 Maximum temperature increase rate
Pag. 135 7.3 Data programming
Pag. 136 7.3.1 Delayed start and setting data
Pag. 137 7.3.2 Immediate start
Pag. 138 7.4 Using the aspiration unit
Pag. 138 7.5 Correcting data on a program that is running
Pag. 138 7.6 Checks during work
Pag. 139 7.7 No electrical power
Pag. 139 7.8 Residual risk

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CHAPTER 1: INTRODUCTION
This Use and Maintenance Manual provides information on the utilisation, installation
and maintenance of the D series ovens (versions furnace D30,furnace D40,furnace D50),
manufactured by Zhermack S.p.A.
• The equipment must be used in accordance with the instructions in this manual: it is therefore
recommended that you read it carefully prior to installation and start-up. Make sure that you
read the entire manual and pay particular attention to messages written in bold type or items
highlighted by boxes and/or symbols: the symbols are designed to highlight situations involving
danger or requiring caution (see paragraph 1.2).
• Observance of standards and regulations shown in this manual will ensure that the equipment
is used properly and that maintenance work is carried out safely.
• This Use and Maintenance Manual is an integral part of the equipment: it should therefore be
kept together with the equipment so that it can be consulted as and when necessary (keep the
booklet in a secure dry place away from sunlight, atmospheric agents, etc.). It must be
available for consultation throughout the working life of the equipment even when the equipment
is sold or finally dismantled.
• It is recommended that you keep this manual constantly updated by integrating any
amendments, additions or modifications made by the Manufacturer. Any notes or comments
should be made on the blank pages at the rear of the booklet (see Appendices: Notes).
• Use the manual properly so that it is not damaged in any way.
• Do not remove, tear or write on any part of the pages.
• If the manual is lost or damaged and its contents become illegible you can request a
replacement copy from the Manufacturer.
The purpose of this Use and Maintenance Manual is to provide users with information on how
to operate the equipment properly. The manual contains all the information needed to use the
device as intended: in particular the manual includes instructions and information on the
following:
• correct installation of the equipment;
• Detailed description of how the equipment works and its components;
• Initial start-up;
• Scheduled maintenance;
• Basic Safety and Accident Prevention info.
1.1
HOW TO READ AND USE THE MANUAL

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1.2 TERMINOLOGY AND SYMBOLS
This manual contains nine chapters each of which covers a specific argument.
The appendices at the rear of the manual are a useful complement to these chapters.
It is important that you understand the following symbols and their significance as they
highlight important information such as critical situations, practical advice, or straightforward
information.
If you have any doubts as to the significance of a symbol always consult this page.
• Critical situations concerning dangerous areas or tasks in which failure to observe the
instructions may render the warranty null and void, or cause damage to equipment, connected
components or the surrounding area, are highlighted by the symbol:
DANGER!
This symbol refers to safety standards which must be observed at all times in order to
protect both workers and equipment.
WARNING!
This symbol refers to safety standards which must be observed carefully in order to
guarantee your safety, other people's safety and prevent damage to the equipment.
• Tasks for which failure to observe instructions or tampering with equipment parts may put
personnel in serious danger are highlighted by the symbol:
• Any work that fails to comply with instructions in this manual, or any tampering which might
automatically render the warranty null and void, is highlighted by the following symbol:
FORBIDDEN!
This symbol refers to actions which must never be carried out (i.e. forbidden
actions).
• Any general information and/or advice which may be useful at any time is highlighted by the
following symbol:
NOTE!
This symbol highlights information and/or useful advice.

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Personnel may be divided into the following categories:
• Operator-user:
Person trained to use the equipments. He/she may carry out all the tasks needed to operate the
equipments: these tasks include starting/stopping the equipment, carrying out routine inspections and
any other tasks linked to everyday equipment use.
2.1
RESPONSABILITY
CHAPTER 2: GENERAL INFORMATIONS
Failure to observe the instructions in this Use and Maintenance Manual exonerates the
Manufacturer from any liability whatsoever.
For any matters not covered by this manual or about which you have any doubts please contact
the Manufacturer directly:
Zhermack S.p.A.
Via Bovazecchino, 100
45021 Badia Polesine • RO • Italy
Tel. [phone] • Fax [phone]
http://www.zhermack.com e-mail: [email protected]
If equipment maintenance work fails to comply with instructions or is done in such a way as to
compromise equipment integrity or modify its characteristics Zhermack S.p.A. shall be
exonerated from any liability as regards worker safety and/or equipment performance.
2.2
WARRANTY: GENERAL INSTRUCTION
Included in the Appendices to this Use and Maintenance Manual you will find the Warranty
certificate and the ID Form which must be filled out in full.
In general the Warranty is rendered null and void by the following:
• Improper equipment use.
• Incorrect installation.
• Serious negligence of maintenance schedules.
• Modifications to or work on the equipment which has not been authorised by the Manufacturer
(especially on safety devices).
• Use of non-original spare parts.
Zhermack S.p.A. cannot, as of this moment, be held liable if the equipment is
modified or tampered with without prior written consent from the Manufacturer.
Consequently, any repairs made by unauthorised personnel, use of non-original
spare parts or failure to comply with the installation standards specified in this
manual shall immediately render the Warranty null and void.
2.3
AUTHORIZED PERSONNEL

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Before using this equipment or carrying out any work on it, the operator must
read the entire contents of this manual. This manual has been drawn up to
provide the user with essential information on rational, safe utilisation of the
equipment. The user must comply with the information given at all times.
Furthermore, the user must use the work sheets enclosed with this manual so
as to keep a record of maintenance/component replacement work as well as
make notes on any equipment malfunctions.
The operator-user must only use the equipment when it is fully assembled and
the safety devices are working properly as described in this manual.
• Zhermack S.p.A. authorised maintenance technician:
Person authorised to carry out work on the equipment under all operating conditions and all
safety levels. He/she is also authorised to carry out any mechanical or electrical repairs/adjustments,
scheduled maintenance and any component replacement work.
2.4 GENERAL SAFETY REGULATIONS
The operator must read the advice and warnings given below and comply with such regulations
at all times: doing so will ensure safe, long-lasting equipment performance.
The oven that you have purchased is a source of danger owing to the high temperatures
occurring both in its interior and on its exterior. The following precautions must therefore be
observed at all times:
• The oven must only be used at the rated voltage indicated on the oven ID plate.
• Do not allow untrained personnel to use this equipment.
• Persons using the equipment must wear protective goggles, pincers and gloves.
• The cylinders must be introduced and removed from the preheating chamber using suitable
pincers.
• The door must only be opened by way of the handle: this is made of special insulating
material to prevent burns.
• The oven must be installed in a protected area (see section 6.3), using guards equipped with
systems that allow only frontal access (gates, shutters etc.).
• The oven must be positioned on non-flammable supports and tops only; no highly flammable
materials, whether solid, liquid or gaseous, may be stored or used in the vicinity of the oven.
• The equipment must remain fully protected both during heating and for at least six hours after
it has been switched off.
• An info plate reading “WARNING: HOT PARTS” must be placed by the equipment (see
section 3.5.1).
• Take measures to ensure that you are not distracted when using the equipment.
• Never use a malfunctioning equipment and always inform the Maintenance Manager of any
faults.
• Extractor fans connected to an outdoor outflow pipe must be used when mixtures using
solvents harmful to operators’ health are used.
• Do not open compartments containing electrical parts.

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Zhermack S.p.A. cannot be held liable for any damage to persons or objects
caused by incorrect maintenance carried out by unqualified personnel or
maintenance work that does not comply with the instructions in this manual.
Zhermack S.p.A. is, as of this moment, exonerated from any liability concerning
injury to persons or damage to objects that may result from using this
equipment in a way other than that described in this manual.
This equipment has electrical parts: therefore, in the event of a fire, no matter
how small, use only powder-type extinguishers. Never attempt to put out an
electrical fire with water.
• Have the equipment inspected by the Manufacturer and/or Authorised Dealer at least one
every 12 months.
• Do not replace the power lead or tamper with the supplied plug.
• It is forbidden to use the equipment on items other than those for which it has been
specifically designed.
• Before doing any cleaning, routine and/or unscheduled maintenance work make sure that the
equipment has been unplugged from the mains socket.
• Make sure that there are no foreign objects inside the work area as these could damage the
equipment and/or injure personnel.
• Do not use petrol or flammable solvents as detergents; use only non-flammable, non-corrosive,
and non-toxic substances (see paragraph 8 .1).
• Do not used compressed air to clean small pieces; if you do so you should protect your eyes
with goggles that provide lateral protection and limit air pressure to a maximum of 2 bar.

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3.1 GENERAL DESCRIPTION OF THE EQUIPMENT
3.2 TABLE OF THE COMPONENTS
CHAPTER 3: DESCRIPTION OF THE EQUIPMENT
F
E
A
D
B
C
L
H
I
GM
The D series ovens have been designed to fire and/or melt the lining cylinders used in
odontotechny. The D series of ovens consists of:
• furnace D30,furnace D40,furnace D50 ready for aspiration tube insertion.
furnace D50 furnace D40 furnace D30

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3.3
CONTROL PANEL
1 2 3 4
8 9 10
6
5
1311 12
7
A. Aspirator (optional Code A0030320)
B. Door open/close handle
C. Magnetic closure
D. Control panel (see section 3.3)
E. Oven chamber door
F. Door microswitch
G. Power lead
H. Hood socket
I. Aspirator socket
L. Ceramic air bleeder
M. Fuses
Control panel structure/functions are the same on all D ovens.
3.2.1
Description of the components

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3.4 ENTERING DATA
• Programmed start.
The oven can be programmed to come on at a set time even when no members of personnel
are in the laboratory ( see paragraph 7.3.1).
The time interval is expressed in:
- hours (0:99)
- minutes (0:59).
Use of the delayed start feature is not, of course, necessary for proper oven operation.
• Entering temperature data.
Temperature, expressed in degrees centigrade (°C) may vary within the following range:
- minimum (room temperature)
- maximum (1,100°C).
• Entering data for fast temperature increase rate.
The temperature increase rate, expressed in degrees centigrade (°C) per minute may vary within
the following range:
- minimum (1°C per minute)
- maximum (maximum power of each series D oven- see paragraph 4.1.1).
After entering the temperature increase rate parameter it is also possible to enter the aspirator
fan switch-off temperature (see para. 7.3.1 point I.).
1. led HEATING Shows, on display, that element is on
2. led TIMING Shows, on display, that delayed start is on
3. led LOAD ON Shows, on display, that active heating phase is on
4. Data display
5. led °C / MIN. Shows temperature increase rate setting on display
6. led °C Shows temperature setting on display
7. Main switch
8. TEMP. Shows in-chamber temperature
9. CYCLE Standard heating cycle with delayed start disabled
10. DELAY CYCLE Delayed start cycle and subsequent heating phase
11. PROG. Access to programmes
12. + To increase data settings (Time, Temperature, Temp. increase rate)
13. _To decrease data settings (Time, Temperature, Temp. increase rate)
3.3.1 Description of control panel components

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3.5
IDENTIFICATION DATA
The equipment described in this manual has an ID platelet giving information about both the
equipment and the manufacturer:
Zhermack S.p.A.
BADIA POLESINE - ITALY
C305302 - D 30
Matr. 20000000
230 V~ 50/60 Hz 1550W
A
BC
D
The equipments has been built in compliance with the EC directives listed in the enclosed "EC
declaration of conformity". When requesting spare parts, information or assistance from your
Authorised Servicing Centre always quote the data on the ID plate.
Should the ID plate deteriorate and become illegible, even partially, order a replacement plate
from the manufacturer: remember to quote the relevant data.
A. Name and address of manufacturer
B. Equipment code and model
C. Serial number
D. Power supply information
Do not remove and/or damage the plate as you must be able to read the data at
all times.
ATTENZIONE! DANGER OF AN ELECTRICAL
CURRENT. DO NOT OPEN DOORS OR REMOVE PROTECTION BEFORE YOU
HAVE DISCONNECTED THE PLUG FROM THE ELECTRICAL SOURCE.
3.5.1
On-equipment labels and symbols
The following symbols are applied on the equipment:
WARNING! HOT PARTS. EXTREME DANGER.
USE PINCERS, EYE GOGGLES AND HEAT-INSULATED GLOVES.

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4.1 TECHNICAL CHARACTERISTICS AND OPERATING START
Zhermack S.p.A. designs and manufactures work instruments that provide cutting-edge
technology and first-rate quality. They are specially designed to provide made-to-measure
solutions that offer long-lasting performance every single day of their working life.
In making these products Zhermack S.p.A. makes use of the latest design tools, thus ensuring
that all finished equipment is as functional as possible. Use of only top-quality materials and
thorough testing aimed at providing maximum user safety are an Zhermack S.p.A. constant,
making our products safe and internationally competitive.
The D series ovens have been designed to fire and/or melt the lining cylinders used in
odontotechny.
The different models of the series D ovens differ only in terms of technical characteristics.
The control panel (how to program this is explained in detail in Chap.7) is the same on each
model.
The D series ovens are characterised by:
• electronic microprocessor operation.
• possibility of programming and storing temperature and heating rate.
• digital controls.
• protection against accidental data cancellation.
• large, luminous display for secure, immediate data reading during programming and work
procedures.
• acoustic beepers.
• safety fuses.
• signal in event of broken thermocouple and automatic deactivation of element.
• door with magnetic closure.
• safety microswitch connected to door; when door is opened the oven chamber power supply
is disconnected.
• data and timer settings maintained in the event of a power failure.
CHAPTER 4: TECHNICAL CHARACTERISTICS
4.1.1 Technical data
MODEL: D 30 D 40 D 50
Dimensions (cm) L33 x P32 x H45 L39 x P37 x H49 L39 x P47 x H49
Interchamber dimensions (cm) L12 x P16 x H9,5 L17 x P16 x H11 L17 x P26 x H11
Weight (kg) 15 26 30
Aspirator dimensions (cm) L12 x P15 x H65 L12 x P15 x H65 L12 x P15 x H65
Aspirator weight (kg) 3 3 3
Cylinder capacity 4-3x 2-9x 6-3x 4-9x 11-3x 6-9x
Min. increase time to 700°C 30 °C 30 °C 40 °C
Max absorbed power (watt) 1550 2000 2400
Power supply 230V~10% 50/60Hz 230V~10% 50/60Hz 230V~10% 50/60Hz

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4.1.2
Standard accessories and accessories available on request
COMPONENTS QUANTITY ORD. CODE*
Ceramic air bleeder 1 XI0030030
Scored refrac. plate for Series 30 1 XI0030070
Scored refrac. plate. for Series 40 1 XI0030073
Scored refrac. plate. for Series 50 1 XI0030075
Chamber base refractory tube Series 30 2 XB0030370
Chamber base refractory tube Series 40-50 2/3 XB0030180
Door open/close handle 1 XI0031010
Fuse 2
Hood socket 1 XE9900140
Aspirator (optional) 1 C305320
In addition to this Use and Maintenance Manual the equipment comes complete with:
* Please quote the order code when ordering a spare part. You may order parts from your local Authorised Servicing Centre.
4.2
TEMPERATURE TOLERANCES
Temperature tolerances on D preheating ovens are ± 10 % with respect to the maximum
temperature limits given in section 4.1.1.

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5.1 WARNING
5.2 PACKING AND UNPACKING
All the material is thoroughly checked by the Manufacturer prior to shipment. When you
receive the goods make sure they have not been damaged during transit and that no-one has
tampered with the packaging and removed any of the parts contained therein.
Should you note any damage or missing parts please inform your Dealer and the shipping
carrier immediately: take photographs and send them on to both dealer and carrier.
The packaging, consisting of a cardboard box with internal expanded plastic padding, contains:
• D series ovens;
• standard equipment (see section 4.1.2);
• this Use and Maintenance Manual.
CHAPTER 5: TRANSPORT AND MOUNTING
To prevent any injury to persons or damage to things always proceed with the
utmost care and attention when handling the equipment. Observe all the
precautions and instructions contained in the following paragraphs.
It is recommended that you keep the original packaging so that, if
necessary, it can be re-utilised; doing so ensures that you do not use
unsuitable packaging materials during transport and handling which might
lead to accidental damage (see section 5.3).
The equipment is not supplied with pincers, gloves or protective glasses;
however, the operator must be in possession of these items in order to
utilise the equipment.

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Should the oven you have purchased need to be moved it must first be fully disconnected from
the power supply and then left to cool completely. Proceed as follows:
1. close the oven chamber door;
2. gather all its accessories together;
Equipment handling for transport and/or packaging purposes must be carried out in compliance
with a few essential rules. These are as follows:
5.3
TRANSPORT AND MOUNTING
Failure to observe the above exonerates the Manufacturer from any
liability concerning equipment malfunction and consequently renders the
Warranty null and void.
When shipping/delivering the equipment to your Authorised Servicing
Centre always enclose a copy of the purchase document and a copy of the
properly compiled ID form.
If the unit is to be transported by courier, the postal service or rail it is
recommended such shipments be insured.
3. Pack the equipment in its original box or, if this is not possible, take all the necessary
precautions to protect the equipment against knocks or drops, in that the goods are transported
at the owner's risk.
Proceed cautiously, bearing in mind the size and weight of the unit (see section 4.1.1), so as to
prevent any accidents that might be caused by failure to evaluate such factors.
a. To handle and/or move the equipment
there must be at least 2 (two) workers:
they must grip the unit securely under its
base.
b. Handling and/or moving the
equipment by gripping its protective
screen is strictly forbidden.

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5.4 ELIMINATION / DISMANTLING
When disposing of the packaging materials the user must comply with the standards in force
in his/her country regarding the following materials:
• Wood/paper: non-polluting materials, but must be recycled properly
• Polystyrene/plastic: pollutants which must not be burnt (toxic fumes) nor dispersed into the
environment, but disposed of in compliance with the standards in force in the country of use.
If the equipment is to be dismantled the user must, in compliance with EC directives and the
laws in force in the country of use, effect elimination and recycling of the following materials:
• Plastic and glass parts, insulated electrical wiring, rubber parts.
• There are no toxic or corrosive parts.
This product must not be disposed of as household waste but rather, when
no longer used, must be collected separately according to EC Directive
2002/96.

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The equipment must rest on non-flammable supports and tops only.
It is strictly forbidden to store any solid, liquid or gaseous flammable substances
in the vicinity of the equipment.
6.1
WARNINGS AND PRECAUTIONS
CHAPTER 6: INSTALLATION AND FIRST-TIME USE
So as to provide greater clarity the numbers given in the diagrams in this
chapter correspond exactly to the numbering in the Components Table
(Ch. 3).
Work area lighting is an important factor in both personnel safety and the
ultimate quality of the work being done. In Italy lighting must comply with a
Ministerial Decree Law that clearly defines minimum lighting requirements.
In other countries lighting requirements form part of the accident prevention
and workplace hygiene standards.
Before proceeding with installation make sure that all relevant safety conditions prevail and
follow the instructions below carefully.
6.3
REQUIRED WORK SPACE
Choosing a good workplace with an appropriate amount of space available for equipment
installation is an essential factor in personnel safety, the quality of the work and proper
maintenance. This zone must not only be spacious enough to allow for optimum equipment
operation but must also be well illuminated, aired, not dusty and not exposed to direct sunlight.
Note also that the unit must be positioned so the connection plug can be handled/manipulated with
ease.
6.2
PERMITTED AMBIENT CONDITIONS
Unless stated otherwise at the time of order the equipment will be configured to operate properly
under the following ambient conditions:
Ambient conditions other than those listed above may cause malfunctions or sudden breakdowns.
Lighting in the installation area must be sufficient to provide good visibility at every single point
on the equipment.
More specifically, luminosity must not be less than 200 lux, lighting must be as uniform as
possible and there must be no reflected light as this could dazzle the operator.
The equipment must not be used in workplaces having an atmosphere which is
explosive and/or at risk of fire as it has not been designed for use in such areas.
Nevertheless, should a fire accidentally break out follow the procedure described
in paragraph 2.4.
Place of Use Indoors
Altitude Up to 2000 m
Working temperature From 5°C to 40°C
Humidity Max 80%

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6.3.1 Worktops
The equipment has been designed for
use on a rigid worktop parallel to the
floor. Suitable worktops include service
furniture (where the operator is
standing) or modelling tables (where
work is done sitting down). All worktops
must be checked for stability.
The oven must be installed in a protected area using guards equipped with
systems that allow only frontal access (gates, shutters etc.).
Should the above-described connection be necessary it is essential that no
elbows or bends be created as combustion fumes and gases would no longer
be drawn outwards.
Position the equipment so that the fan flue is beneath the mobile hood
aspiration tube.
The aspiration fan flue must be free and must not be connected to other tubes or hood ducts.

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6.4
CONNECTING UP TO THE POWER SUPPLY
The user must provide a power connection with relative socket near the equipment installation
point. The user must also install an adequate electrical circuit breaker upstream from the socket
as well as efficacious overload/indirect contact safety devices.
Connection is effected via the safety plug (16A, in compliance with European standards) at the
end of the power lead: this must be inserted in the mains socket.
When connecting check:
• that mains voltage and frequency are as indicated on the identification plate (incorrect power
supply voltage may damage the equipment).
• that the mains supply has a proper, efficient earth connection;
• The D50 model must be connected to a mains network with an impedance the same as or les
than Zmax=0,278 (as per EN61000-3-11).
Should power surges occur while the equipment is working, or when it is any case connected
to the mains, proceed as explained in section 7.7.
It is forbidden to tamper with the power lead and its plug. When replacing them
owing to damage and/or wear please contact an Authorised Service Centre.
A proper earth connection is compulsory. Should it temporarily be necessary to
use an extension lead the latter must comply with the standards in force in the
country of use.
Figure 1
Fig. 1 : Remove the bleeder from its seat and
connect up the aspirator using the screws
supplied with the aspirator itself.
6.4.1
Connecting up the aspiration unit (optional)
Figure 2
Fig. 2 : Finally, insert the aspirator plug in the socket
on the rear panel of the oven base.