Renfert Magma 2300-0000 User manual

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Made in Germany
Magma
Nr. 2300-0000 /-0500 /-3000 /-3500
21-6530 0410 B Ideas for dental technology

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- 25 - EN
Introduction
We are pleased with your decision to purchase the
Magma preheating oven.
Please read the following operating in-
structions carefully and observe the safety
information they contain in order to ensure
a long and trouble-free service life.
Symbology
The following symbols and key terms are employed in
these instructions and on the unit itself:
Danger
This indicates a direct risk of injury. Please
consult and observe the operating instruc-
tions.
Electrical current
This indicates a hazard due to electrical
current.
Attention
Failure to observe the associated informati-
on can result in damage to the unit.
Note
This provides the operator with useful
information to make working with the unit
easier.
Magma
No. 2300-0000 /-0500 /-3000 /-3500
ENGLISH
Content
Introduction......................................................25
Symbology.......................................................25
Information for Operators ................................26
Operating Instructions
1. Setup and Commissioning .......................26
1.1 Installing the Handle....................................... 26
1.2 Setup .............................................................. 26
1.3 Adjusting the Unit’s Feet ................................ 26
1.4 Power Connection .......................................... 26
1.5 Curing............................................................. 27
2. Operation .................................................27
2.1 Operating Elements........................................ 27
2.1.1 Keys ................................................................................. 27
2.1.2 Status LEDs ..................................................................... 27
2.2 Switching the Oven ON / OFF........................ 27
2.3 Basic Settings................................................. 27
2.3.1 Setting the System Date / Time........................................ 28
2.3.2 Setting °C / °F .................................................................. 28
2.3.3 Switching the Acoustic Signal Generator ON / OFF......... 28
2.4 Display the Current Time / Date ..................... 28
2.5 Standby .......................................................... 28
2.6 Mains Power Failure Detection ...................... 28
3. Speed Programming Simple Heating
Processes ................................................29
4. Programming............................................30
4.1 Programme Selection..................................... 30
4.2 Entering Heating Phase Values ..................... 30
4.3 Copying Heating Programmes ....................... 31
5. Operating the Oven..................................31
5.1 Heating Programme Selection ....................... 31
5.2 Start the Heating Programme......................... 32
5.2.1 Without a Programmed Casting Time .............................. 32
5.2.2 With a Programmed Casting Time ................................... 32
5.3 Running a Heating Programme...................... 32
5.3.1 Other Indicators During Heating....................................... 32
5.3.2 Modifying Parameters During a Heating Programme....... 33
5.4 Ending a Heating Programme ........................ 33
5.5 Post-Heating................................................... 33
5.6 Catalyser ........................................................ 34
5.6.1 Mounting the Catalyser .................................................... 34
5.6.2 Connecting the Catalyser................................................. 34
5.6.3 Automatic Operation......................................................... 34
5.6.4 Manual Operation............................................................. 34
5.6.5 Status Display .................................................................. 34
6. Cleaning / Maintenance ...........................35
6.1 Heating Muffle Inspection............................... 35
6.2 Cleaning the Oven Chamber.......................... 35
6.3 Replacing the Fuses....................................... 35
6.4 Replacing the Thermocouple ......................... 35
6.5 Replacing the Door Sensor ............................ 35
6.6 Backup Battery Replacement......................... 36
6.7 “Err” Display ................................................... 36
7. Spare Parts ..............................................36
8. Standard Delivery.....................................36
9. Delivery Versions .....................................36
10. Accessories..............................................36
11. Error List...................................................37
Information for Operators
A. Application Area .......................................38
A.1 Proper Use ..................................................... 38
A.2 Improper Use.................................................. 38
A.3 Setup .............................................................. 38
A.4 Ambient Conditions (in accordance
with DIN EN 61010-1) .................................... 38
A.5 Ambient Conditions for Storage and Shipping 38
B. Hazard and Warning Information .............39
B.1 Personal Protective Equipment (PPE) ........... 39
C. Authorised Individuals..............................39
D. Preparations Prior to Starting...................40
E. Repairs.....................................................40
F. Disposal Information ................................40
F.1 Device Disposal.............................................. 40
F.1.1 Disposal Instructions for EU Member Nations.................. 40
F.2 Insulation Material....................................40
G. Technical Specifications...........................40
H. Liability Exclusion.....................................40
I. Warranty...................................................40

- 26 -
EN
Information for Operators
Using these operating instructions as a
starting point, instruct all operators of the
unit with regard to the area of application,
the possible hazards during operation,
and the proper operation of the preheating
oven.
Please have these operating instructions readily avai-
lable for the operators.
Additional information can be found in the Section,
“Information for Operators”,
at the end of these instructions.
1.3 Adjusting the Unit’s Feet
The height of the feet on the rear of the oven can be
adjusted to compensate for uneven or sloping sur-
faces.
To adjust the feet:
Loosen the locknuts (SW 13 mm spanner);•
Manually adjust the feet;•
Retighten the locknuts.•
Adjust the unit’s feet so that the oven
slopes slightly to the rear, thus allowing
any wax spills to flow to the back and burn
rather than flowing out of the front of the
oven.
1.4 Power Connection
The oven is connected to the power supply via the
permanently attached power cord, equipped with a
grounded plug.
Before starting the oven, make sure the wall outlet to
which it is connected is protected by a 16A fuse.
Before connecting the unit to the wall out-
let, make sure the voltage information on
the nameplate corresponds to your local
power supply!
Unroll the power cord.•
Plug the power cord into the wall outlet.•
Switch the oven on at the main power switch (Figu-•
re 2).
When the oven is first switched on the display-
asking you to set the system time will flash (refer
to Sec. 2.3.1).
Display of the unit of temperature to be indica--
ted, °C / °F. (Refer to Sec. 2.3.2 for instructions
on how to modify the displayed units.)
Make sure no parts of the power cord are in
contact with hot areas of the housing! Do
not lay the power cord on top of the oven!
Operating Instructions
1. Setup and
Commissioning
Remove the packed components from the
interior of the oven and insert the ceramic
pad.
Preheating furnaces with
Art. no. 2300.x500 have been set up for
operation with a catalyst converter and are
delivered without a flue.
The catalyst converter (Art. no. 2300.0001)
must first be installed before the oven can
be operated (refer to Sec. 5.6.1)
1.1 Installing the Handle
Using the included screw, mount the handle on the
side of the oven door (Figure 1), 4mm SW Allen key.
The handle can be mounted on either the left or the
right side.
1.2 Setup
Set up the oven so that it is easily accessible from•
the front and so that stooping or other uncomfortab-
le positions are avoided when working with the unit.
The oven must be set up on a stable, fireproof•
surface.
Please note the following when selecting
the setup area:
Corrosive condensation from the flue may
drip onto the setup surface.
A space of at least 10 cm (4 inches) to adjacent•
ovens or walls must be left free.
Flammable or combustible objects may not
be placed or stored on or near the oven.
A fireproof surface on which hot items removed from
the oven can be placed should be provided in close
proximity to the preheating oven.
Only intended for indoor use.
Before opening the unit, disconnect it from
the mains power supply by unplugging the
power cord from the wall outlet.
Hot surface. Burn hazard!
Press the key.
Other symbols are explained as they occur.

- 27 - EN
1.5 Curing
The oven has already been cured at the factory du-
ring manufacturing.
This can be determined by the discolouration around
the door panel, the ceramic in the oven and the door
jamb.
These discoloured areas are not quality faults.
2. Operation
2.1 Operating Elements
AMain power switch (Figure 2)
2.1.1 KEYS
(Refer to Figure 3, 4)
Increase value
Decrease value
Cursor to the next stage
Cursor to the previous stage
“P” key, programme selection
Timer key (casting time / clock)
ESC key, exit current mode without saving mo-
difications
ENTER key, accept and permanently save the
input values
Start/Stop key
Catalyser key
2.1.2 STATUS LEDS
(Refer to Figure 3, 4)
Selection indicator in the upper display:
Temperature display (°C/°F)-
Programmed heating rate display (°/min)-
Date display-
Selection indicator in the lower display:
Time display-
Heating status LED:
OFF:-
Heater off
Red:-
Oven temperature LOWER than the setpoint
Green:-
Setpoint reached or exceeded
Programme LED:
LED flashing:-
Programme being copied (refer to Sec. 4.3)
LED continuously on:-
Input modifications have not yet been saved.
Catalyser status LED
Flashing:-
Catalyser heating
Continuously on:-
Catalyser has reached its operating temperature.
Heating phase LEDs:
4 increase phase LEDs-
4 holding phase LEDs-
2.2 Switching the Oven ON / OFF
The oven is switched on and off at the main power
switch A (Figure 2).
If the clock has not been set, the oven will
automatically go into the “Set system date /
time” mode when it is switched on (refer to
Sec. 2.3.1).
You can only exit this mode by chan-
ging the default system date / time
(01.01.2000 / 00:00).
Once the oven has been switched on, the following
are shown:
Upper display (approx. 2 sec. each)•
The selected unit of temperature, °C or °F-
(Refer to Sec. 2.3.2 for instructions on how to
modify the displayed units.)
The actual temperature.-
After this, the most recently selected programme is
called up. The heating phase LEDs for which a value
has been stored go on for approx. 2 sec.
The controller switches to the normal display which
indicates the following:
Upper display:•
The last stage holding temperature.-
Lower display:•
The programme number.-
If no key is pressed within 30 seconds, the controller
returns to the standby mode (refer to Sec. 2.5).
If the oven was switched off during a heating pro-
gramme, the mains power failure detection takes
effect (refer to Sec. 2.6).
2.3 Basic Settings
The following are part of the basic settings:
Setting the system date / time with a choice of the•
date format (Day:Month / Month:Day);
Selection of the unit of temperature measurement•
(°C / °F);
Switching the acoustic signal generator on and off.•

- 28 -
EN
2.3.1 SETTING THE SYSTEM DATE / TIME
The following sequence is used to set the system
date / time:
Year - Month - Day - Hour - Minute.
1. Switch the oven off at the main power switch.
2. Press and hold the timer key.
3. Switch the oven on at the main power switch.
The year flashes in the upper display.-
4. Use the upper +/- keys to enter the year.
5. Confirm your input by pressing ENTER.
The month flashes in the upper display.-
6. Use the upper +/- keys to enter the month.
If you wish:-
Press the upper +/- keys simultaneously:
The date format changes from Day:
Month <> Month:Day
7. Confirm your input by pressing ENTER.
The date flashes in the upper display.-
8. Use the upper +/- keys to enter the date.
9. Confirm your input by pressing ENTER.
The hour flashes in the lower display.-
10.Use the lower +/- keys to enter the hours.
11. Confirm your input by pressing ENTER.
The minutes flash in the lower display.-
12.Use the lower +/- keys to enter the minutes.
13.Confirm your input by pressing ENTER.
The oven then behaves in the same way as after a
normal start-up (refer to Sec. 2.2).
Pressing the ESC any time prior to the last
time you press the ENTER key (step 13)
takes you back one setting step.
2.3.2 SETTING °C / °F
The currently selected unit of temperature is display-
ed in the upper display for approx. 2 sec. after the
oven is switched on.
To modify the unit of temperature:
1. Switch the oven off at the main power switch.
2. Press and hold down the upper + key.
3. Switch the oven on at the main power switch.
Upper display:-
Current unit of temperature (“C” or “F”)
4. Continue holding the key until the other unit
(“F” or “C”) is displayed (after approx. 5 sec.).
The oven then behaves in the same way as after a
normal start-up (refer to Sec. 2.2).
2.3.3 SWITCHING THE ACOUSTIC SIGNAL
GENERATOR ON / OFF
The Magma preheating oven is equipped with a
signal generator to acoustically indicate the end of a
heating programme. This function can be activated or
deactivated.
To do this:
1. Switch the oven off at the main power switch.
2. Press and hold down the “P”.
3. Switch the oven on at the main power switch.
If the signal generator was previously on, it is-
now off:
Lower display: S : OF and a brief sound.
If the signal generator was previously off, it is-
now on:
Lower display: S : ON and longer sound.
The oven then behaves in the same way as after a
normal start-up (refer to Sec. 2.2).
2.4 Display the Current Time /
Date
No matter what mode you are operating in, you can
always display the current time and date.
Press the timer twice quickly (within 3 sec.)•
In the upper display:-
Current date
In the lower display:-
Current time.
The display remains on for 3 sec.
2.5 Standby
If no key is pressed within 30 seconds, the oven swit-
ches to the “Standby” mode.
The following are displayed in this mode:
Upper display: Current temperature,-
Lower display: Current time.-
At the same time, the brightness of the displays and
the LEDs is reduced.
Press any key to exit the standby mode.
The unit does not switch to the standby
mode while the oven is heating, during wai-
ting phases prior to heating, or while values
are being entered.
2.6 Mains Power Failure
Detection
The controller is equipped with a mains power failure
detection function which activates to overcome brief
power outages or if the main power switch is acciden-
tally switched off.
If the power supply fails for less than 10 minutes du-
ring heating, the controller will continue from the point
in the program at which the power failed.
The timer is battery-buffered and may react to a po-
wer failure with a delayed start. The casting time will
be recalculated to reflect this.
The heating programme will not be restar-
ted if power is not restored until after the
programmed casting time has passed!

- 29 - EN
3. Speed Programming
Simple Heating
Processes
The speed programme is indicated by the programme
number „P_ _“.
The speed programme includes only the increase
and holding phases for stage 4.
During the increase phase, heating always occurs at
the maximum rate (not programmable).
1. Press the “P” key,
2. Select the speed programme
g
The speed programme, „P_ _“, is located
between P99 and P01.
You can also switch to the speed program-
me if you press the upper + OR - key from
the normal display.
3. Adjust the holding temperature
g
4. Adjust the holding time (h:min), max. 3 hr.
g (
5. Program the casting time (if desired)
Briefly press the timer key:-
Current casting time displayed-
Date
Time
Set a new casting time is desired (in 15-minute-
increments):
6. Press the Start/Stop key – start the speed pro-
gramme
The casting time is displayed (for approx.-
2 sec.):
Date
Time
Increase phase:-
Current oven temperature
Display in the holding phase:-
Current oven temperature
Remaining holding time (h:min)
Other possible displays are described in Sec. 5.3.1.
7. The speed programme ends at the conclusion of
the 4th stage holding time. This is indicated by an
acoustic signal.
The following actions can be performed once the
speed programme has run out:
NONE:•
The acoustic signal automatically switches off after
approx. 15 sec. and the temperature is maintained.
Open and close the oven door:•
The acoustic signal switches off, die and the tempe-
rature is maintained.
or :
The acoustic signal switches off, and the tempera-•
ture is maintained.
or (upper +/- keys):
The acoustic signal switches off, the oven switches
to the post-heating mode (refer to Sec. 5.5).
:
The acoustic signal switches off, the heater swit-
ches off and the programme terminates.

- 30 -
EN
4. Programming
The Magma preheating oven gives you the option of
creating and saving heating programmes.
You can store up to 99 different heating programmes
(P01 to P99).
A heating programme comprises a maximum of 4
heating stages.
Each heating stage consists of the following heating
phases:
Increase phase:-
Heating rates in the range between 0 - 9 °C/min.
(0 - 17°F/min.) can be specified. An input of “0”
is interpreted as the maximum heating rate.
If an increase phase is used for cooling in
a programme (the holding temperature of
the subsequent stage is lower than that of
the previous stage), the controller sets the
rate to 0 °C/min. (0 °F/min.). Cooling always
takes place at maximum speed which is
determined by the oven’s heat loss.
Holding phase:-
You can also enter the holding temperature and
holding time (max. 3 hr.). If no holding tempera-
ture is entered (0°C / 0°F), the programme skips
over this heating stage.
4.1 Programme Selection
You can store up to 99 different heating programmes.
To select a specific heating programme:
1. Press the “P” key.
2. Press the lower +/- key until the desired program-
me number is displayed.
y
4.2 Entering Heating Phase
Values
1. Use the cursor keys to select the heating phase:
/
2. Modify the desired value(s):
Increase phase:-
Enter the heating rate in °C/min (°F/min).
Holding phase:-
Enter the holding temperature in °C (°F) and the
holding time in hours:minutes (max. 3 hr.).
Holding down the +/- key will change the value in
larger increments.
As soon as you modify a value the pro-
gramme LED goes on to indicate that va-
lues have been modified and can be saved.
3. Permanently save values and remain in the input
mode:
(Briefly press the ENTER key.)
This will save any value you have modified in this
heating programme and you will remain in the input
mode.
A successful save is indicated by a brief acoustic
signal and by the programme LED simultaneously
going out.
Follow this process (steps 1 - 3) to enter the values
for all desired heating phases.
4. Exit the input mode.
Immediately start the heating pro-
gramme.
OR
Display the current casting time star-
ting point.
You can program a new, later casting time starting
point (refer to Sec. 5.2.2) and then start the heating
programme.
OR
Return to the normal display.
If there are still any unsaved values, this will be
indicated by the programme LED going on.
Press the ENTER key to save these values now.
OR
Cancel the input and exit the input
mode.
All modifications not yet saved with the ENTER
key are deleted and the original values are reset.
In addition, the controller exits the input mode and
returns you to the normal display.
If you press the ENTER key for a longer
period (2 sec.), previous values you ente-
red for this programme will not be saved.
Instead, you will be taken to the “Copy
programme” mode (refer to Sec. 4.3).

- 31 - EN
4.3 Copying Heating
Programmes
Copying an existing heating programme allows you to
quickly and easily create new, similar heating pro-
grammes.
To do this:
1. Press the “P” key:
2. Select the heating programme you wish to use as
a template:
3. Select the “Copy heating programme” mode:
(press the ENTER key approx.
2 sec.) until:
The programme LED;-
The programme number display flashes.-
4. Select a new heating programme:
g g
5. Transfer the values from the template to the new
heating programme:
g
While you are selecting a new programme
number in step 4, the LEDs of those heating
phases for which values have been pro-
grammed go on for every selected program-
me. This makes it easy to find “empty” or
unused programme numbers.
Heating phase LED
If you press the ESC or P key during step 5 no
values will be saved under the new number.
5. Operating the Oven
Place the ceramic slab (B, Fig. 5) into the furnace•
with the arrows pointing towards the rear wall and
push the slab fully to the rear.
Always use the ceramic pad when opera-
ting the oven!
Contamination of the heating muffle by wax,
cinders or soot can result in damage to the
heating muffle.
Place the material to be heated in the oven.•
Do not stack casting moulds!
Do not allow material being heated to be
in contact with the temperature probe (A,
Figure 5) as this will result in an incorrect
temperature reading.
Close the furnace door.•
The furnace door is mounted on floating
bearings to ensure complete and secure
closure and thus provide the best possible
temperature distribution in the furnace‘s
interior.
Therefore, when closing the door, its bot-
tom edge contacts the furnace opening
first, followed by the remaining door border.
In turn this results in a palpable increase in
the force required to close the door ac-
companied by a slight grinding sound just
before the door closes fully.
This is intentional and does not represent a
door fault.
Select the desired heating programme (refer to•
Sec. 5.1):
Adjust the casting time as required (timer) (refer to•
Sec. 5.2.2).
Start the heating programme (refer to Sec. 5.2).•
5.1 Heating Programme
Selection
1. Press the “P” key.
2. Press the lower +/- key until the desired program-
me number is displayed.
y

- 32 -
EN
5.2 Start the Heating Programme
5.2.1 WITHOUT APROGRAMMED CASTING TIME
Start the heating programme:•
The current casting time is displayed (for approx.•
2 sec.):
)
The heating programme switches the heater on and
works its way through the programmed values.
5.2.2 WITH APROGRAMMED CASTING TIME
The Magma preheating oven allows you to program-
me the timer so that the selected heating programme
concludes at a specified time (= casting time).
1. Briefly press the timer key:
The current casting time is displayed-
Date
Time
OR
1. Press and hold the timer key:
The most recently programmed casting time is-
displayed
Date (next available date)
Time (previously set casting time)
The controller automatically advances the
date by one day if the casting time is no
longer possible on the current date.
2. If desired, set a new casting time is desired (in 15-
minute increments):
)
3. Start the heating programme:
The controller waits and switches the heater on when
the conclusion of the heating programme matches
the programmed casting time.
During this waiting period:
The time LED flashes;-
The green heating status light remains on;-
The displays indicate the casting time.-
Press the timer key.•
The heater start time is displayed for approx.-
3 sec..
A programmed casting time can be deleted if:•
You modify programmes;•
You modify values in a programme;•
You exit the casting time input mode by pressing•
the ESC key;
You press the ESC key in the normal display;•
You start and then stop the heating programme.•
The duration of the programme is derived
from the sum of the programmed holding ti-
mes in the holding phases together with the
heating rates during the increase phases,
starting with the current oven temperature.
5.3 Running a Heating
Programme
After pressing the Start/Stop key or after the wait time
has expired, the heating programme starts with the
first programmed heating phase.
While the heating programme is running, the individu-
al displays indicate the following:
During every increase phase:•
Current oven temperature.-
During every holding phase:•
Current oven temperature;-
Remaining holding time (h:min).-
In addition:
The heating phase LED of the currently active pha-•
se flashes;
The heating phase LEDs of those phases which•
have already been concluded are continuously on;
Heating status LED state:•
Green-
Holding temperature reached;
Red-
Holding temperature not yet reached;
Off-
Heater switched off (e.g., when the door is
open).
You can open the oven door at any time
during heating programme without the pro-
gramme being cancelled.
If the oven door is opened during an incre-
ase phase, the heating phase is extended,
thus changing the casting time.
Opening the oven door during a holding
phase the phase holding stage continues
and, when it has run out, the next phase is
started. The heater, however, remains off.
The heating programme can be terminated at any
time by pressing the Start/Stop key.
5.3.1 OTHER INDICATORS DURING HEATING
You can use the following keys to display additional
information during heating.

- 33 - EN
“P” key:•
Upper display:-
Holding temperature of the last programmed
stage in the current programme.
Lower display:-
Number of the current programme.
Heating phase LEDs for those phases for which-
a value has been saved are continuously on.
The LED for the current heating phase flashes.
Up / Down cursor keys:•
Select a heating phase. The selected heating-
phase goes on (the current one continuous to
flash).
The values programmed in the heating phase-
are displayed for approx. 5 sec. and may be
modified (refer to Sec. 5.3.2).
Timer key:•
Displays the currently calculated casting time-
(date / time).
The casting time is continuously re-calcu-
lated. This may result in deviations with
regard to a programmed casting time, e.g.,
if the oven door was opened during an
increase phase.
Pressing the timer key twice in rapid succession:•
Displays the current time (date / time). Refer-
also to Sec. 2.4.
5.3.2 MODIFYING PARAMETERS DURING AHEATING
PROGRAMME
The following temporary modifications can be made:
For all as yet not started phases:•
>>All values
In the current holding phase•
>>The holding time
In the current increase phase•
>>The increase rate
Modifications CANNOT be made to phases which
have already been processed.
Change values:
Up / down cursor keys•
Select the heating phase whose values you-
which to modify. The LED of the selected phase
goes on.
Use the +/- keys to modify the values.•
The controller automatically exists the modification•
mode after approx. 5 sec. The values are now tem-
porarily saved and will be used for the remainder of
the current heating programme,.
The re-calculated casting time is displayed for-
approx.. 3 sec.
The ENTER, P or ESC keys are functionless
during temporary parameter modifications.
These modifications are only temporary
and are not saved as part of the current pro-
gramme. To permanently save the values,
proceed as described in Chapter 4.
5.4 Ending a Heating Programme
A heating programme can be prematurely cancelled
at any time with:
y
If it is not prematurely cancelled it automatically ends
once the holding time in the last programmed stage
expires. This is indicated by an acoustic signal.
The following actions can be performed once the
heating programme has run out:
NONE:•
The acoustic signal automatically switches off after
approx. 15 sec. and the temperature is maintained.
Open and close the oven door:•
The acoustic signal switches off, die and the tempe-
rature is maintained.
• or :
The acoustic signal switches off, and the tempera-
ture is maintained.
• or (upper +/- keys):
The acoustic signal switches off, the oven switches
to the post-heating mode (refer to Sec. 5.5).
•
The acoustic signal switches off, the heater swit-
ches off and the programme terminates.
5.5 Post-Heating
By pressing the upper + or - keys, you can access the
post-heating mode at the conclusion of any heating
programme which was no cancelled with the Stop/
Start key:
The following appears:
In the upper display:-
The holding temperature of the 4th stage of the
last programme.
In the lower display:-
P_ _, for approx. 2 sec,
followed by:
The hold time last used in the speed program-
me.
You can now:
Immediately change the holding temperature;•
Immediately change the holding time.•
y g
The oven then heats at the maximum heating rate
(which cannot be changed) without any further input
until the new holding temperature is reached (or until
the oven cools to this temperature).
During post-heating you can also modify the holding
temperature and holding time.

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EN
5.6 Catalyser
A catalyser can be connected to the oven (refer to the
accessories).
The controller automatically detects the presence of a
connected Renfert catalyser.
5.6.1 MOUNTING THE CATALYSER
1. Loosen the fastening screws on the preheating
oven and remove the flue (Figure 11).
2. Install the Catalyser’s mounting plate (Figure 12).
Take care no to damage the ceramic oven
flue!
3. Before mounting the Catalyser, make sure its
fastening screw is retracted (Figure 13).
4. Push the Catalyser completely onto the mounting
plate up to the stop (Figure 14).
5. Tighten the Catalyser’s fastening screw (Figu-
re 15).
5.6.2 CONNECTING THE CATALYSER
Before connecting the unit to the wall out-
let, make sure the voltage information on
the nameplate corresponds to your local
power supply!
Plug the power cord into the wall outlet. (Please•
use a separate outlet for the Catalyser!)
Use the included cord to connect the Catalyser to•
the oven (Figure 16 and Figure 17).
5.6.3 AUTOMATIC OPERATION
The controller automatically switches the catalyst
converter on and off during the course of a heating
programme.
The catalyst converter is automatically switched on or
off whenever:
The P_ _ programme is running;•
A phase programme with only a single phase is•
running;
The oven temperature is less than 650°C in a pha-•
se programme consisting of multiple phases;
The temperature is retained at the conclusion of a•
heating programme (refer to Sec 5.4);
If the oven switches to the post-heating mode at•
the conclusion of a heating programme (refer to
Sec 5.5).
The catalyst converter is automatically switched off
whenever:
A heating programme has been completed (refer to•
Section 5.4);
The oven temperature exceeds 650°C during multi-•
stage programmes with several phases.
5.6.4 MANUAL OPERATION
The catalyst converter can also be manually switched
on and off by the operator during a heating program-
me.
To switch the catalyst converter on:•
Press briefly.
An extended audible tone provides confirmation
of the action.
To switch the catalyst converter off:•
Press and hold for at least 2 se-
conds.
An short audible tone provides confirmation of
the action.
Once the catalyst converter has been manually
switched on, the current heating programme will no
longer switch it off, that is, the catalyst converter ope-
rates independently of the controller.
Only if the heating programme is ended by pressing
the STOP button will the catalyst converter also be
switched off. During the next heating programme, the
catalyst converter will again be automatically cont-
rolled by the heating programme.
The catalyst converter must be switched
on at least 10 minutes prior to charging the
oven with material.
A cold catalyst converter will be damaged
by the generated combustion vapours.
5.6.5 STATUS DISPLAY
The status LED indicates the current Catalyser
state:
Flashing:-
Catalyser heating up.
Continuously on:-
The Catalyser has reached its operating tempe-
rature.
Off:-
The Catalyser is switched off.

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6. Cleaning / Maintenance
Only perform cleaning and maintenance if
the oven is cold!
Use a soft, moist cloth and cleanser to clean the
housing.
Never use abrasive cleansers or cleansers containing
solvents!
6.1 Heating Muffle Inspection
Inspect the heating muffle regularly (at least once per
month) for damage and cracks.
The oven must be immediately taken out
of service if cracks result in a risk of the
heating elements being able to be touched.
The heating muffle may only be replaced by an au-
thorised specialist. The following hazard information
must be observed during replacement:
Dust particles from the insulation jacket
trapped between the heating muffle and the
housing represent a health hazard if in-
haled!
Always wear respiratory protection during
disassembly / assembly work!
Always wear gloves protection during di-
sassembly / assembly work!
6.2 Cleaning the Oven Chamber
The oven chamber should be cleaned regularly to
remove dust and broken muffle and die pieces.
Switch the oven off at the main power
switch before cleaning.
Only clean the oven chamber once it is
cold.
Use only a dry cloth or vacuum cleaner to
clean the oven chamber. Never use clean-
ser or other liquids.
The investment materials used for the dies
represent a health hazard.
Comply with the investment material ma-
nufacturers’ safety data sheets and always
wear appropriate protective equipment.
6.3 Replacing the Fuses
The circuit breakers are located on the rear of the
unit (Figure 6) and can be reset if required (press the
button).
6.4 Replacing the Thermocouple
The thermocouple must be replaced if the protective
ceramic tube surrounding it is damaged.
Proceed as follows:
1. Switch the oven off at the main power switch.
2. Unplug the power cord at the wall outlet.
3. Turn the oven so that the thermocouple on the
back is easily accessible (Figure 7).
4. Loosen the fastening screw (Figure 8) and remove
the protective cover.
5. Disconnect the cable (Figure 9).
6. Pull the thermocouple straight out, towards the
rear (Figure 10).
7. Insert a new thermocouple into the oven, making
sure it is straight (Figure 10).
8. Connect the cable, making sure the colours match
(Figure 9):
White: Negative-
Orange: Positive-
9. Install the protective cover and secure it together
with the thermocouple using the fastening screw
(Figure 8).
6.5 Replacing the Door Sensor
The door sensor is a safety component. It
may not be manipulated.
After replacing the sensor it must be exami-
ned for proper function.
A sensor located on the underside of the door is used
to detect the door position. Should the oven overheat,
the sensor can become inactive so that the door’s
closed state will no longer be detected.
To replace:
1. Switch the oven off and unplug the power cord at
the wall outlet.
2. Allow the oven to cool off.
3. Completely open the door and loosen the door’s
fastening screws (Figure 18).
Injury hazard!
The springs are under tension. Hold them
when loosening.
4. Unhook the springs from their holder in the door
(Figure 19).
5. Gently press the metal housing outwards until the
door is released from its retainer (Figure 20).
6. Remove the door (Figure 21), leaving the springs
on the door pivots to avoid mixing them up.
7. The sensor (Figure 22-A) can be replaced using
pliers (Figure 22).
8. Reinsert the door in the housing and screw the
fastening screws down.
9. Remove the springs from the door pivots and first
insert them into the opening in the oven wall, then
rotate them and pull them back onto the pivots
(Figure 23).
10.Hook the springs to the door retainer (Figure 24).
11.Plug the power cord into the wall outlet and switch
the oven on.
12.Check that the switch is functioning properly:
Select the speed programme;-
Enter a holding temperature of 30°C;-
Start the heater.-
Open / close the oven door: With the door-
closed the heater status indicator should be
red or green and must go out when the door is
opened.

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EN
6.6 Backup Battery Replacement
1. Switch the oven off and unplug the power cord at
the wall outlet.
2. Allow the oven to cool off.
3. Loosen the operating unit fastening screws (Figure 25).
4. Pull the operating unit out towards the front and
lay it aside.
5. Unplug the ribbon cable (Figure 26) and close the
connector retainer clips (Figure 27).
6. Loosen the top housing cover screw (Figure 28).
7. Remove the top housing cover.
Do not touch any components or solder
points on the PCB!
8. Replace the battery (Figure 29), taking care not to
reverse the polarity. The + pole is on top.
When reinstalling the top housing cover
make sure no components on the PCB are
damaged!
9. Replace the top housing cover and secure it with
the screw.
10.Open the connector retainer clips (Figure 30).
11. Reconnect the ribbon cable (Figure 31).
12.Push the operating unit straight back into the oven
and secure it with the screws.
13.Check the system time as described in Sec. 2.3.1
and reset, as required.
6.7 “Err” Display
The controller is able to detect a variety of fault
situations which it indicates by displaying “Err” in the
upper display (refer to Sec. 11, “Error List”).
The “Err” display appears whenever an anticipated
reaction on the part of the oven (or the oven tempera-
ture) fails to occur.
The heater is simultaneously switched off.
Burn hazard!
Do not touch the oven if “Err” is display-
ed. Switch the oven off at the main power
switch and allow it to cool off.
7. Spare Parts
Refer to the spares list at the end of this manual for
numbers of wearing and replacement parts.
8. Standard Delivery
1 Magma preheating oven
1 Ceramic pad
1 Operating instructions
1 Handle set
9. Delivery Versions
No. 2300-0000 Magma, 230V, 50/60 Hz
No. 2300-0500 Magma, 230V, 50/60 Hz,
for Catalyser, only together with
No. 2300-0001
No. 2300-3000 Magma, 230 V, 50/60 Hz,
with NEMA6-15P plug
No. 2300-3500 Magma, 230 V, 50/60 Hz,
with NEMA6-15P plug
for Catalyser, only together with
No. 2300-3001
10. Accessories
No. 2300-0001 Catalyser
No. 2300-3001 Catalyser with NEMA6-15P plug
No. 9-0003-5962 Flue
No. 9-0003-6000 Handle set

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11. Error List
Error Possible cause Corrective action
Displays remain blank
after the oven is swit-
ched on at the main
power switch.
Power cord not plugged in.•
Building fuse blown.•
Device fuse blown.•
Plug the power cord into the wall outlet.•
Check the building fuse and replace, as re-•
quired.
Check the device fuse and replace, as required•
(refer to Sec. 6.3).
The building fuse
blows each time the
heater is switched on.
Inadequate mains power pro-•
tection.
The building fuse must be at least 16A.•
Heating status display
fails to go on even
though the heater has
been switched on with
the Stop/Start key.
Oven door not closed.•
Door sensor fallen off.•
Faulty door sensor.•
Faulty internal door open detec-•
tion switch.
Close the unit door.•
Reinstall the door sensor (refer to Sec. 6.5).•
Replace the door sensor (refer to Sec. 6.5).•
Have the unit repaired.•
Heating status display
indicates heating but
the oven fails to warm.
Faulty thermocouple.•
Faulty heater coil.•
Faulty power electronics.•
Replace the thermocouple (refer to Sec. 6.4).•
Have the unit repaired.•
Have the unit repaired.•
Temperature display
stays at a specific
value even though the
oven heats.
Faulty thermocouple.• Replace the thermocouple (refer to Sec. 6.4).•
Extremely excessive
temperature; oven
overheats.
Faulty thermocouple.•
Faulty power electronics.•
Replace the thermocouple (refer to Sec. 6.4)•
Have the unit repaired.•
The programme imme-
diately starts when the
oven is switched on.
Oven was switched off before•
programme ran to completion.
Switching the oven off was
interpreted as a power failure.
Wait until the programme concludes before•
switching the oven off or prematurely terminate
the programme with the Stop/Start key.
The wrong time is in-
dicated in the standby
mode.
Clock not set.•
The clock backup battery is•
dead.
Check the system time and reset, as required•
(refer to Sec. 2.3.1).
Replace the backup battery (refer to Sec. 6.6).•
The indicated casting
time makes no sense
Faulty system time.• Check the system time and reset, as required•
(refer to Sec. 2.3.1).
The year indicator
flashes each time the
oven is switched on
Backup battery is dead.
• Replace the backup battery (refer to Sec. 6.6).•
Err 1 to Err 4 External fault•
Faulty controller•
Switch the oven off, then on, and repeat the•
interrupted procedure (e.g., restart the heating
programme).
Have the unit repaired.•
Err 5 and Err 6 Too much cold material placed•
in a warm oven.
Door left open too long.•
Thermocouple cable loose.•
Faulty thermocouple.•
Restart the heating programme.•
Restart the heating programme.•
Check that the heating cable is securely at-•
tached. Reattach as required.
Replace the thermocouple (refer to Sec. 6.4).•

- 38 -
EN
No vapours may escape into the room atmosphere.
Depending on the types of vapours produced, it may
be necessary to obtain approval from the appropriate
local authorities for the operation of the extraction
equipment.
The hazardous emissions generated by the oven
can be significantly reduced by the employment of a
ctalyst converter (optional accessory).
A.4 Ambient Conditions
(in accordance with DIN EN 61010-1)
The unit may only be operated:
Indoors;•
Up to an altitude of 2,000 m above sea level;•
At an ambient temperature range between 5 - 40ºC•
[41 - 104ºF] *);
At a maximum relative humidity of 80% at 31ºC•
[87.8ºF], dropping in a linear manner to 50% relati-
ve humidity at 40ºC [104ºF] *);
With mains power where the voltage fluctuations do•
not exceed 10% of the nominal value;
Under contamination level 2 conditions;•
Under over-voltage category II conditions.•
*) Between 5 – 30°C [41 – 86°F], the unit can be operated at
a relative humidity of up to 80%. At temperatures between
31 – 40°C [87.8 – 104°F], the humidity must decrease
proportionally in order to ensure operational readiness (e.g., at
35°C [95°F] = 65% humidity; at 40°C [104°F] = 50% humidity).
The unit may not be operated at temperatures above 40°C
[104°F].
A.5 Ambient Conditions for
Storage and Shipping
The following ambient conditions must be maintained
during storage and shipping:
Ambient temperature: -20 – +60ºC [-4 – +140ºF],•
Maximum relative humidity: 80%.•
The following information is intended to assist you,
the operator, in safely working with the Magma prehe-
ating oven in your laboratory.
Using these operating instructions as a
starting point, instruct all operators of the
unit with regard to the area of application,
the possible hazards during operation,
and the proper operation of the preheating
oven.
Please have these operating instructions readily
available for the operators.
A.Application Area
A.1 Proper Use
The Magma preheating oven is solely intended for
use in dental technology laboratories as well as arts
and crafts and jewellery workshops. The preheating
oven is solely intended for waxing up and preheating
casting dies. Only modelling waxes and modelling
plastics may be employed as modelling materials.
Only specialist personnel may operate the unit as
incorrect operation can result in extreme deteriora-
tion in the quality of individual pieces and may also
present extreme hazards to the operator.
A.2 Improper Use
Modelling waxes and modelling plastics MAY NOT be
placed directly in the oven without being embedded in
a casting die.
A.3 Setup
The preheating oven is solely designed to be used
under an extractor or extraction hood.
The extraction equipment must comply with all local
ordinances and regulations.
The extraction equipment must be dimensioned on
the basis of the materials being processed and the
eventual emissions of other devices.
Information for Operators
Error Possible cause Corrective action
Err 7 Faulty thermocouple.•
Oven cooled with compressed•
air and heating programme
started (temperature increase
due to the heat retained in the
oven).
Replace the thermocouple (refer to Sec. 6.4).•
Allow the oven to cool off.•