Bego Miditherm 200 MP User manual

Translation of the original instructions
Miditherm 200 MP
Miditherm 100 MP
en
English
Miditherm 200 MP
307.00804
Miditherm 100 MP
306.01269

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Table of contents
General Information .............................................29
Safety Instructions................................................31
Unit description ....................................................33
Scope of delivery, wearing parts and extras ........34
Technical Data......................................................34
Installation ............................................................35
Program table.......................................................37
Creating a new program.......................................38
Creating a new program for shock heat investment
materials...............................................................39
Checking a program.............................................40
Starting a program................................................41
Starting a program with Finished time..................42
Reducing or increasing temperature in running
program................................................................43
Settings ................................................................44
Service and Maintenance.....................................46
Elimination of malfunctions ..................................47
Signs, labels and stickers.....................................51
Disposal ...............................................................52
Spare parts list ..........................................Appendix
Wiring diagram ..........................................Appendix
Program table............................................Appendix
Certificate of Conformity............................Appendix
GOST certificate........................................Appendix
This unit documentation is part of the unit
and must be enclosed when selling or
passing on the unit.
• The unit has been designed solely for use in
dental laboratories and comparable establish-
ments for research, commercial and training
purposes. The unit must only be operated by
dental professionals, or they must provide
supervision if trainees or other persons operate
unit.
• The operating instructions must be read and
understood before the device is used. This par-
ticularly applies to the Safety information. The
warranty is void in cases of damage which is
caused by non-observance of the operating
instructions. We will also not accept liability for
any resulting consequential damages.
• Symbols used
This symbol indicates very important
information. Failure to comply with it
may result in personal injury.
This symbol warns about hot parts.
This symbol indicates hazards
caused by shock heat investment
materials (do not open door - risk of
darting flame).
This symbol means: use a breathing
protective mask (FFP 2
EN 149:2001).
Switch off the machine and pull out
the mains plug.
Press the button.
Lamp lights up.
Lamp flashes.

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General Information
Importance of the operating Instructions
These operating instructions cover all the infor-
mation that is necessary according to the relevant
regulations for the safe operation of the device
described herein.
The operating instructions are a part of the machine.
The operating instructions should therefore
• always be kept at hand near the device until the
device is disposed of,
• and should be passed on with the device when
it is purchased, sold, or lent.
Contact the manufacturer if you do not understand
something in the operating instructions.
We welcome any suggestions or criticism. Please
feel free to notify us. Your effort will help us make the
operating instructions more user-friendly and
respond more effectively to your wishes and needs.
Target group
This document is directed toward everyone who
works with this device or performs service tasks that
are described in this document.
Contact information
BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG
Wilhelm-Herbst-Str. 1
28359 Bremen
Phone: [phone]
Service-Hotline Phone: [phone]
www.bego.com
¤Copyright by BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG
This user guide is protected by copyright. All rights reserved.
No part of this document may be reproduced without the express written permission of BEGO Bremer
Goldschlägerei Wilh. Herbst GmbH & Co. KG!

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Conventions
These operating instructions contain references to
residual hazards, important user tips and handling
instructions that are identified with the following
symbols and words.
Warranty and Liability
Our general terms and conditions of sale and
delivery apply. These are made available to the
customer on completion of the contract, at the latest.
Warranty and liability claims in the event of physical
injury or damage to property are invalid if they are
caused by one or more of the following:
• Improper use of the device
• Improper installation, putting into operation,
operating and maintenance of the device;
• Operating the device with safety and protective
facilities that are defective, improperly installed
or inoperative
• Failure to heed the information in this manual
concerning the transport, storage, installation,
putting into operation, operation and service
and maintenance of this device;
• Unauthorized structural modifications to this
device;
• Inadequate monitoring/checking of parts of the
device that are subject to wear;
• Improperly performed repairs;
• Catastrophes caused by alien elements or
force majeure.
DANGER
This reference identifies hazards that
can cause serious bodily injury or
death if the relevant hazard instruc-
tions are not followed or not followed
properly.
WARNING
This reference identifies hazards that
can cause bodily injury or property
damage if the relevant hazard instruc-
tions are not followed or not followed
properly.
ATTENTION
This reference identifies only those
hazards that are potential damaging
to property and the environment.
NOTE
This symbol identifies user tips and particularly
useful information. It helps you optimally exploit
all the functions of your machine.
1. Sequential actions are described in sequentially
numbered paragraphs.
→Cross-references are identified with this symbol.

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Safety Instructions
Miditherm is designed exclusively for wax removal
from and preheating of dental objects, such as
duplicate models and casting moulds made of
commercially available investment materials. Any
other use is considered to be improper. We shall not
be liable for any damage resulting from improper
use.
The safety instructions must be followed in order to
prevent personal injury and damage to the machine.
We shall not be liable for damage due to failure to
comply with the safety instructions.
General Safety Instructions
Place of use
The unit has been designed solely for use in dental
laboratories and comparable establishments for
research, commercial and training purposes.
The unit may only be installed on an adequately
stable surface.
The unit must only be used in dry rooms.
Operator and operating personnel
The unit must only be operated by dental profes-
sionals, or they must provide supervision if
trainees or other persons operate unit.
Wear the protective clothing prescribed for use in
dental laboratories and observe the rules of
conduct.
The unit may only be operated by staff members
who are familiar with and follow the instructions of
this operating manual.
The operating manual must be easily accessible
when the machine is operated. Observe the national
accident prevention regulations in addition to this
operating manual.
Handling the machine
Prior to the electrical connection check whether the
specifications on the rating plate correspond to the
power supply network. In the case of uncertainty,
consult an electrician.
The unit is categorised under protection class 1 and
may only be connected to properly earthed power
sources (earth contact sockets).
Modifications to the device and the mains unit must
not be carried out.
Always keep signs and stickers such that they are
easy to read. They must not be removed.
Check the machine and leads for damage regularly.
The machine must not be operated if it has any
defects that may result in risks for the employees or
third persons.
Protect the leads against heat, oil and sharp edges.
The leads must not be used to carry the machine or
to pull out the mains plug.
Repair work
Repairs may be carried out solely by BEGO
customer service or by persons authorised by
BEGO customer service.
Metallic housings must be grounded properly so
as to prevent them from carrying current. Otherwise
they are extremely dangerous because the
housings may be live due to damage to the
machine! Since a check to ensure a de-energized
state is mandatory after every intervention in the
machine (Germany: check in accordance with DIN
VDE 0701-1), only qualified electricians may open
the machine!
Only BEGO replacement and wearing parts may be
used.
Care and maintenance
Switch off the machine and pull out the mains plug
before performing any care, cleaning or mainte-
nance work.
Only use dry or slightly moist cloths for cleaning. Do
not spray the machine with water or immerse it in
water.

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Special safety instructions regarding this machine
WARNING
Installation, site of Installation
and start-up
• Install unit only on adequately sta-
ble and non-combustible surface.
• Because of the wax vapours, install
the furnace under a chimney stalk
as far as possible. Always dis-
charge vapours outdoors.
• Only use the furnace in dry rooms.
• There must not be any combustible
objects in the area near the fur-
nace.
• There must not be any highly flam-
mable or explosive gas, liquids or
solid material in the same room as
the furnace.
• Remove transport protection
device from the mould chamber pri-
or to start-up!
WARNING
Danger due to electric shock
• Always connect the furnace to a
separate circuit with 16-ampere
fuse protection.
• The machine is subject to the provi-
sions of class of protection I and
may only be connected to properly
grounded power sources.
• Use the rear plug only for connect-
ing the Regulus furnace suction
extraction unit (200-240 V).
WARNING
Hazards from formation of dust!
• Parts of the insulation contain carci-
nogenic ceramic fibres that may be
released during servicing work. Use
gas mask type FFP 2 EN 149:2001
for servicing work with dust genera-
tion.
WARNING
Burn hazard from hot parts!
• Wear protective clothing (protective
apron), safety shoes, safety gog-
gles and protective gloves.
• Only touch the hot furnace door at
the handle.
• Move hot moulds only with suffi-
ciently long tongs.
• Let the unit cool down until it is
warm to the touch before carrying
out any care, maintenance or clean-
ing work.
WARNING
Hazard from Shock heat
investment materials
So-called shock heat investment
materials are not heated up slowly,
but are placed in a furnace that has
been preheated to the final temper-
ature. As a result, the modelling
material burns atypically, i.e., if the
furnace door is opened, inflowing
oxygen can cause a darting flame!
• Place all moulds in the furnace
within 10 seconds - then keep the
furnace door closed for 15 minutes!
• For shock heat investment materi-
als, the Regulus furnace extraction
system (REF 25750) must be
installed.
•Regulus must be set to continuous
operation (→page 39).

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Unit description
Miditherm MP
Miditherm laboratory ovens serve for waxing and
preheating of casting flasks and duplicate models.
They provide users with the facility for using both
shockheating and conventional embedding
materials. The required finishing time, even for
longer periods, can be programmed with the aid of
a micro-controller.
1 Mains cable(rear)
2 Exhaust outlet (rear)
3 Flask chamber
4 Control panel
5 Main switch
6 Combined display: Time / Finishing time/ Day
7 Combined display: Heating rate /
Oven temperature / Duration of holding stage
8 Holding stage display
9 Program display
Function buttons
Miditherm 100 MP
Miditherm 200 MP
Call-up parameters
Change values
Program
Start / stop program
Start / stop program with Finished
time

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Scope of delivery, wearing parts and extras
Scope of delivery
Miditherm 100 MP
200…240 VAC, 50/60 Hz ...................... REF 26150
Miditherm 200 MP
200…240 VAC, 50/60 Hz ...................... REF 26155
with:
• Ceramic base plate
• Operating instructions
Wearing parts and extras
REF
Wearing parts .............................. see spare part list
Mould tongs 55 cm ........................................ 39754
Mould tongs 64 cm .........................................11599
Regulus furnace suction extraction unit
200…240 VAC............................................... 25750
Technical Data
Miditherm 100 MP
Height..........................................................480 mm
Width ...........................................................350 mm
Depth ..........................................................420 mm
Mould chamber .........................100 / 150 / 170 mm
Weight (empty).......................................... ca. 28 kg
Nominal voltage .............. 200…240 VAC, 50/60 Hz
Power consumption....................... 1600 VA (230 V)
Temperature (maximum) .............................1150 °C
Miditherm 200 MP
Height ......................................................... 600 mm
Width .......................................................... 470 mm
Depth.......................................................... 550 mm
Mould chamber..........................110 / 200 / 250 mm
Weight (empty) ..........................................ca. 56 kg
Nominal voltage............... 200…240 VAC, 50/60 Hz
Power consumption....................... 2700 VA (230 V)
Temperature (maximum) ............................ 1150 °C
NOTE
The spare parts list is appended.
When ordering spare parts please quote the REF,
quantity and equipment serial no.
All wearing parts marked with * will not be
replaced under the conditions of the warranty or
the BEGO guarantee.

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Installation
Fig. 3 Installation Regulus
WARNING
Installation, site of Installation
and start-up
• Install unit only on adequately sta-
ble and non-combustible surface.
• Because of the wax vapours, install
the furnace under a chimney stalk
as far as possible. Always dis-
charge vapours outdoors.
• Only use the furnace in dry rooms.
• There must not be any combustible
objects in the area near the fur-
nace.
• There must not be any highly flam-
mable or explosive gas, liquids or
solid material in the same room as
the furnace.
WARNING
Danger due to electric shock
• Prior to the electrical connection
check whether the specifications on
the rating plate correspond to the
power supply network. In the case
of uncertainty, consult an electri-
cian.
• Always connect the furnace to a
separate circuit with 16-ampere
fuse protection.
• The machine is subject to the provi-
sions of class of protection I and
may only be connected to properly
grounded power sources.
• Use the rear plug only for connect-
ing the Regulus furnace suction
extraction unit (REF 25750,
200…240 V).
• If moulds are to be preheated using
the shock heat method, the Regulus
furnace extraction system must be
installed!

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Basic principles
Displays after unit is switched on
0…3 sec: parameter of the controller
> 3 sec: current furnace temperature
Furnace care
1. Prior to first use, start program #9
(→page 41): The furnace heats up to 1050 °C
and maintains this temperature for 60 minutes.
This results in the formation of a protective
oxide layer on the heating wire.
2. Always use the ceramic base.
3. Place the moulds in the chamber so there is no
contact to the walls as far as possible.
NOTE
Remove transport protection device from the
mould chamber prior to start-up!
NOTE
Explanation of the symbols →page 28.
Software

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Program table
Up to 9 programs can be stored with Miditherm
(#1 to #9).
Up to 4 temperature holding levels can be set in
each program ( to ).
The following must be set at each holding level:
• heating-up speed (0 to 9 °C/min.),
• temperature of the holding level (max. 1150 °C)
• duration of the holding level (max. 99 min.).
The cut-out temperature of the connected Regulus
furnace extraction system can be set for each
program. The factory setting (600 °C) is adequate
for customary investment materials that are heated
up slowly. For shock heat investment materials, the
Regulus furnace extraction system must be set to
continuous operation (→page 39).
Five standard programs are factory-set for BEGO
alloys. The programs can be overwritten as
required.
Your own programs should be noted. The tables in
this documentation (please make copies) serve this
purpose.
NOTE
• In programs with fewer than 4 temperature
holding levels set all values of the following
holding levels to "0".
• The furnace heats up at maximum speed when
the heating-up speed is set to "0°C/min.".
• In seldom cases of lower power supply and
above 800 °C, the heating-up speed may not
be achieved.

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Creating a new program
1. Switch on the unit. The current temperature of
the furnace is displayed after approx.
3 seconds.
2. Select program:
• Press as often until LED # lights up.
• Press until desired program number
appears.
3. Call up programming mode:
Keep button depressed until LED "°C/min."
flashes.
4. Call up and set the parameters at holding
level 1:
Press to call up the following param-
eters
• heating-up speed (°C/min),
• temperature of the holding level (°C),
• duration of the holding level (min)
(the relevant LED flashes).
Press to set the values of the param-
eters.
5. To set the next holding level, go to the
field using the buttons and call up the next
holding level using the buttons.
Set the parameters at this holding level as
described in point 4.
6. Exit the programming mode:
Keep button depressed until LED "°C" lights
up.
NOTE
• You should keep a note of your own programs.
The tables in this documentation are provided
for this purpose.
• Set up the „care program” at program location 9
(see section “Service and Maintenance”,
page 46):
• Heating-up speed "0°C/min.",
• temperature of holding level: 1050°C,
• duration of holding level: 60 minutes.
• Holding levels 2 to 4: all values = 0!
• Always set all holding levels! All values in the
unused holding levels of a program must be set
to "0".
• Heating-up speed "0°C/min." = maximum heat-
ing-up speed!

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Creating a new program for shock heat investment materials
1.-3. →page 38.
4 Call up and set the parameters at holding
level 1:
• heating-up speed: 0°C/min. (= max.)
• temperature of the holding level: see invest-
ment material
• duration of the holding level: see investment
material
Set the parameters of holding levels 2, 3 and 4
to zero.
5. Press to set the extraction system to con-
tinuous operation. The display shows „SH”
(shock heat).
(Press again to deactivate.)
6. Exit the programming mode:
Keep depressed until the LED „°C” lights
up.
WARNING
Hazard from Shock heat
investment materials
So-called shock heat investment
materials are not heated up slowly,
but are placed in a furnace that has
been preheated to the final temper-
ature. As a result, the modelling
material burns atypically, i.e., if the
furnace door is opened, inflowing
oxygen can cause a darting flame!
• Place all moulds in the furnace
within 10 seconds - then keep the
furnace door closed for 15 minutes!
The cut-out of the Regulus furnace
extraction system is set to 600°C at
the factory. Shock heat investment
materials are placed in the furnace at
a higher temperature and produce
concentrated smoke gases in a short
space of time.
• For shock heat investment materi-
als, the Regulus furnace extraction
system (REF 25750) must be
installed.
•Regulus must be set to continuous
operation (see below).

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Checking a program
1. Switch on the unit. The current temperature of
the furnace is displayed after approx.
3 seconds.
2. Select program:
• Press as often until LED # lights up.
• Press until desired program number
appears.
3. Check values:
Press to check the values of
• heating-up speed (°C/min),
• holding temperature (°C) and
• holding time (min.).
4. To check the next holding level, go to the
field using the buttons and call up
the next holding level using the
buttons.
5. Check the settings at this holding level as
described in point 3.
6. The current furnace temperature is displayed
again approx. 10 seconds after the last button
was pressed. The check is now finished.
NOTE
• The current furnace temperature is displayed
again approx. 10 seconds after the last button
was pressed. This also happens when hesitat-
ing too long before pressing the next key.
• Always check all holding levels! All values in the
unused holding levels of a program must be set
to "0“.
• Changing values: →page 38.

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Starting a program
1. Switch on the unit. The current temperature of
the furnace is displayed after approx.
3 seconds.
2. Select program:
• Press as often until LED # lights up.
• Press until desired program number
appears.
3. Start program:
Press .
• LED lights up.
• LED "°C” lights up, display shows increas-
ing furnace temperature.
• LED lights up, display shows time of end
of program.
When a holding temperature is reached, the
LED "min" lights up and the remaining minutes
of the holding time are displayed.
4. At the end of the program an acoustic signal
sounds and LED flashes.
• End program (furnace cools down):
press .
• Hold furnace temperature: do not press .
WARNING
Hazard from shock heat
investment materials: Risk of
injury during shock-heating!
Place all moulds in the furnace within
10 seconds - then keep the furnace
door closed for 15 minutes!
NOTE
• After program start it takes around 5 minutes
for the furnace temperature to rise.
• Information on next holding temperature: press
(only during heating-up process).
• Turn off acoustic signal after end of program:
open and close furnace door.
• To turn off permanently →page 45.
• After short power failures the program remains
stored and is resumed. Thus, the program can-
not be ended by means of the master switch.

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Starting a program with Finished time
1. Switch on the unit. The current temperature of
the furnace is displayed after approx.
3 seconds.
2. Select program:
• Press as often until LED # lights up.
• Press until desired program number
appears.
3. Call up Finished time:
Press (LED flashes).
4. Setting the weekday:
Press .
1 = Monday, 2 = Tuesday, … , 7 = Sunday
5. Setting the time of day
Hours:
• Press (LED flashes).
• Press for Finished time (hours)
Minutes:
• Press (LED flashes).
• Press for Finished time (minutes)
6. Exit Finished time mode:
Press once (LED lights up).
NOTE
• Setting the current time and date: →page 44.
• The furnace will start automatically so the
selected program is completed at the set Fin-
ished time.
• Information on the time of the automatic start:
press .
• Delete a Finished time (LED lights up):
press .
• If the calculated and the actual Finished time
deviate significantly from each other (over
30 minutes), a correction program can be
started: when switching on the unit, keep the
button depressed (display shows P).
Attention: The correction program lasts approx.
8 hours!

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Reducing or increasing temperature in running program
Example:
After the end of the program (LED flashes) the
furnace temperature is 800°C. Further heating to
900°C is desired.
1. Keep depressed until LED "°C/min."
flashes.
2. Press (LED "C" flashes).
3. Press until desired temperature
appears.
4. Keep depressed until the LED "°C" lights
up.
NOTE
• To change the temperature during the running
program, never press the button!
Pressing this button ends the program.
Pressing it again would restart the program,
beginning with holding level 1.
• The temperature of the furnace can be
changed at every time of a running program.
The change will not be stored permanently in
the program.

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Settings
Date and time
1. When switching on, keep button
depressed:
display shows "P1" (after approx. 3 seconds)
and an acoustic signal sounds.
2. Set weekday with buttons:
1 = Monday, 2 = Tuesday, … , 7 = Sunday.
3. Press button to call up "P2" and set time
(hours) with buttons.
4. Press button to call up "P3" and set time
(minutes) with buttons.
5. Press button 4 times:
Display shows the current furnace temperature
(after approx. 7 seconds). "Date and time"
setting is finished.
P1 = weekday setting
P2 = time setting (hours)
P3 = time setting (minutes)
NOTE
The time must be set after installation and when
changing between summer and winter daylight
saving time.
NOTE
• For setting P4 (acoustic signal) and P5 (cutout
temperature of the suction extraction unit)
→page 45.
• P6 has no function.

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Acoustic signal / cut-out temperature of extraction system
At the end of a program an acoustic signal sounds.
If desired, the signal can be switched off perma-
nently.
The Regulus extraction system can be connected to
the rear socket. You can set up to what furnace
temperature the suction extraction unit is supplied
with power .
1. When switching on unit, keep depressed:
display shows "P1" (after approx. 3 seconds)
and an acoustic signal sounds.
2. Press 3 times: display shows "P4".
3. Press :
1 = signal on
0 = signal off
4. Press : display shows "P5.
5. Press to set the cut-out temperature of
the Regulus extraction system. The factory
setting (600°C) is adequate for customary
investment materials that are heated up slowly.
For shock heat investment materials, the Reg-
ulus furnace extraction system must be set to
continuous operation (→page 39).
6. Press twice:
display shows the current furnace temperature
(after approx. 7 seconds).
NOTE
• Setting from P1 to P3 (weekday , time):
→page 44.
• P6 has no function.

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Service and Maintenance
• If necessary, clean the machine on the outside
with a dry or slightly moist cloth.
• If necessary, sweep out or vacuum-clean the
cooled down mould chamber.
• To burn residues of modelling materials, heat
up the empty furnace to 1050°C regularly every
4 weeks and maintain this temperature for
60 minutes. This is particularly necessary if the
furnace is used exclusively at 700°C.
• Always use the ceramic base.
• Place the moulds in the chamber so there is no
contact to the walls as far as possible.
DANGER
Warning of electric shock!
Danger to life!
Switch off the machine and pull out
the mains plug before performing any
care or maintenance work.
Do not spray the machine with water
or immerse it in water.