MRC MSF 11-3 User manual

HIGH TEMPERATURE LABORATORY RESISTIVE ELECTRIC
FURNACES
INSTRUCTION MANUAL
The product conforms to the requirements of the European Union Low Voltage Directive
2014/35/EC, Electromagnetic Compatibility Directive 2014/30/EC, and Machinery Safety
Directive 2006/42/EC.
MSF 11-3
MSF 11-8
MSF 11-13
MSF 11-22
MSF 12-4
MSF 13-6.7
3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[email protected]
MRC. 5.23

TABLE OF CONTENTS
1. PURPOSE 5
2. SYMBOLS AND MARKINGS 5
3. SAFETY REGULATIONS 6
4. REQUIREMENTS FOR SAFE USAGE 7
5. COMPOSITION AND PRINCIPLE OF OPERATION 7
6. UNPACKING, CHECKING EQUIPMENT, DELIVERY 8
7. ASSEMBLY 9
8. PREPARATION FOR USE 10
9. OPERATION 10
10. MAINTENANCE 11
11. STORAGE 12
12. TRANSPORTATION 12
13. WARRANTY 12
14. TROUBLESHOOTING 12
15. ASSESSMENT TECHNIQUE OF THE PARAMETERS 13
46. TECHNICAL SPECIFICATIONS 33
47. ELECTRICAL PRINCIPLE SCHEME 35
48. FURNACE WITH MUFFLE CHAMBERS 65
CLOSED HEATING ELEMENTS 66
OPEN HEATING ELEMENTS 67
49. FURNACE WITH CERAMIC CHAMBERS 68
CLOSED HEATING ELEMENTS 69
OPEN HEATING ELEMENTS 70
50. PACKAGE CONTAINS 71
51. THE PACKAGING PARTS REMOVAL 72
52. FURNACE CONFORMITY CERTIFICATION 73

5
1. PURPOSE
The MRC XX/XXXX electrical resistive laboratory Furnace (further called "Furnace“) is
designed for heatingor drying materials and stocks in the ambient air temperatures from T + 10
to 1100÷ 1300 oC in static conditions (T –temperature of the room where Furnace is being
(operated
2. SYMBOLS AND MARKINGS
Markings
alternating current
earth/grounding contact
danger of electrical shock
caution, hot surface
EXAMPLE OF PRODUCT LABEL:
Identification on the label
Meaning
Model: MSF 11-3
Type of Furnace, 3–total chamber volume (3 dm3);
1100 –nominal temperature (1100ºC).
IP 20
Degrees of protection provided by enclosures EN60529
No 0000
Product serial number
230V
Voltage of power supply 230 V
~50/60 Hz
Frequency of electrical current, Hz
1,8 kW
Nominal power, kW
17 kg
Weight of the product, kg
2023 01
Date of manufacture (year, month)
Mark of conformity with EU requirements
Mark of conformity with Russia requirements
Warning symbols
This symbol precedes any important safety instructions. Personal and property safety could be
put at risk if these instructions are not followed. Before switching on the low temperature
Furnace, it is very important to read and follow all the instructions of this manual.
This symbol precedes manual requirements which must be followed with great care in order to
ensure the Furnace’s correct operation, to prevent damage and to protect the safety operators.
This symbol precedes important information.

6
3. SAFETY REGULATIONS
The Furnace must be used in accordance with the requirements of the user’s technical safety
operation rules for electric equipment and local legislation.
The operator working with the electric Furnace must be informed about the operational
guidelines for electric equipment up to 1000V, acquainted with safety regulations for the
operation of an electric Furnace, and knowledgeable about the product’s operating principles
and proper use.
The Furnace must be earthed and should only be connected to a mains electrical supply that
has an earth/grounding contact. The Furnace must be connected to a mains electrical supply of
the correct rating, check the label on the rear of the Furnace for voltage, frequency and power
usage.
It is prohibited to operate the electric Furnace if the earth/grounding is insecure.
It is prohibited to operate the electric Furnace if any of external protective shields are removed.
If the electric Furnace is operated for a longer period of time, the external surfaces and the door
may get hot. Wear heat-resistant gloves when opening the door of the hot electric Furnace,
loading or unloading it, or touching the hot external surfaces.
Combustible or explosive materials or materials that can become combustible or cause
explosion during thermal treatment must not be loaded into the low temperature Furnace.
Do not load unknown materials into the Furnace.
The gas emitted during thermal treatment has to be directed outside through a ventiduct
(required by existing regulations).
The room where the Furnace is operated must have appropriate ventilation.
It is forbidden to operate the Furnace in a closed, unventilated room.
A room in which several Furnaces are in operation must have a dedicated means of ventilation.
In the event of obvious malfunctions, the Furnace must be immediately turned off. Maintenance
can be performed by MRC Therm service operators, an authorized specialist or a user who
.strictly follows MRC Therm written maintenance instructions
In the event the Furnace ceases normal operations, disconnect it from the power supply (the
mains) and take measures to resolve the problem.
The manufacturer is not responsible for damages arising from the use of the Furnace for
purposes for which it was not intended; the user bears all responsibility.
Any operations that put at risk the Furnace’s safety are forbidden.
General safety and accident prevention rules should be applied.
Only Furnaces that are technically sound should be used.
Failure to comply with instructions could result in negative consequences for the user.
The manufacturer ‘s advice cannot cover all issues. Therefore, the user assumes
responsibility for the reaction and the impact that heat has on materials and the risks related to
conducting tests. Our advice will help to reduce the dangers faced by users as well as protect
the Furnace and the tested materials from damages.

7
4. REQUIREMENTS FOR SAFE USAGE
The electric Furnace should be placed in a closed, ventilated room that meets the following
requirements:
-the electric Furnace should be placed on a base that is horizontal (an allowed unevenness for a 1m
base is ± 1mm.), hard, made of incombustible material;
-height above sea level –up to 2000 m;
-ambient temperature from +5 to +40C;
-ambient relative air humidity should not exceed 80at the temperature of +31C, and should not
exceed 50at the temperature of +40C;
-the voltage fluctuation in the mains (power supply) should not exceed 10of the nominal value;
-the environment should not pose an explosion risk; it also should not contain a large amount of
electrically conductive dust, water vapor, aggressive gas;
-it is recommended that the Furnace be placed under an exhaust ventilation hood;
-the electric Furnace should not be subjected to vibration and shocks;
-it is prohibited to exceed the maximum rated temperature, otherwise the service life of heating
elements will be shortened and the thermocouple could be damaged.
Working chamber is not resistant to mechanical damages. So, using the Furnace you must avoid
mechanical contact with walls of the electric Furnace. During exploitation individual cracks may appear
on inner chamber, which do not affect the technical characteristics of the Furnace and cannot be the
cause of a claim.
5. COMPOSITION AND PRINCIPLE OF OPERATION
The Furnace consists of frame, chamber, door and control panel.
Frame is welded of sheet steel. Chamber is installed in the frame. There are two types of
chambers: chamber of fiber material, with enclosed or open heating elements
(Pic. 1) and chamber made of cordierite boards with open or enclosed heating elements (Pic.
2). A thermo-insulating material is installed around the working chamber and in the door.
Control panel is mounted on the bottom part of the Furnace. When the furnace door
opens, a switch switches off the power supply of the heaters.
For insertion of additional control thermocouple or air supply to the chamber, there is a
point provided in the door (Pic. 3), which is covered with foil. If necessary, user should use a
sharp tool to make a hole. From outside the hole can be covered by protective cover (Pic.3).
The charge is put on the bottom plate of the chamber. Parameters of the electric Furnace
connection to the net: voltage, power, frequency, in each case, are indicated on the label of
the product (see p. 5). Temperature control and adjustment is affected by a temperature
controller operating in combination with a thermocouple mounted in chamber. The
microprocessor controller shows the set and actual temperature, process time.
The air flows through the heating elements and circulates in the chamber.
Electrical principle scheme is attached (see p. 35-62).
Picture 2
Picture 1
Picture 3

8
ADDITIONAL ACCESSORIES MAY BE INSTALLED IN THE FURNACE:
1. Process observation window;
2. Protection from overheating, which prevents the Furnace from exceeding the maximum
temperature. If the maximum temperature is exceeded, the safety device turns the heating
off automatically. If this happens, allow the Furnace to cool down by 50-100˚C below
overheating safety device activation temperature. Turn the Furnace on. To reset safety
device to the inactive mode, find the red button at the front of the Furnace (Pic.4) and press
it (In each case, the mounting position of the button may vary). If the safety device is going
to run again contact the manufacturer or to the company which sold the product (company
addresses at the end of the passport);
3. Timer is designed to delay execution of the program. If timer is mounted in the Furnace the
main switch is on, turn on the fixed control of the timer. For that reason, press the second
counting from left to right, button (A) of the timer. The symbol of closed contacts („ON A“) on
the display will appear and the Furnace will start working normally.
If you want to use the timer to turn the Furnace on / off at the certain time, by following the User
Manual of the timer, set up the Furnace on/off program. After putting in the charge turn the
Furnace on, so that it starts to heat up, and set the timer from fixed to programming control. For
this reason, press second button on the timer (A). The note („OFF A“) should fade from timer’s
display;
4. Buzzer is to alarm about the end of the program;
5. RS-485 / USB interface and software for data recording, viewing and configuring the
temperature controller running your thermal treatment process. The software is designed for
Windows operating system. Computer software allows simply run, review and display charts
on thermal process temperatures and other settings;
6. Data recorder Eurotherm 6100 is for basic visualization and recording requirements. The
6100 has full color display and utilises touch screen technology for clear and intuitive
configuration and operation. It further supports a USB port as standard to enable the use of a
mouse, keyboard or bar code scanner. Data can be moved manually or automatically archived
to multiple locations: removable media, network servers or the Eurotherm Review database on
a PC. The recorder can easily be integrated into a larger system and data files can be
transferred across the network;
6. UNPACKING, CHECKING EQUIPMENT, DELIVERY
Please check the product in its original packaging, if there are any damages of
transportation. Inform the carrier immediately if transportation damage has occurred.
If necessary, carefully flip the packaging with the Furnace in it. Unscrew wood screws that
hold pallet to the cover. Take off the cover.
Remove transportation screws from the bottom of the pallet (Pic. 5).
If the Furnace is attached to the pallet with metal plates (Pic.6), firstly, unscrew wood screws
that hold the metal plates to the pallet then carefully flip Furnace and remove metal plates
attached to the frame.
Remove protective film, take off User Manual, feet and bottom plate (-es), from top of the
product. Take the protective materials out of the chamber (Pic. 7).
Рicture 4

9
Sliding or tilting of the unit.
Damage to the unit.
Risk of injury by lifting heavy loads.
Do not lifti or transport the unit using the door handle, the door or the lower housing.
Forbidden to raise or to carry one person, if the stove weighs more than 30 kg.
Products, which weight from 30 to 60 kg, have lift and transport two people.
Products, which weight in excess of 60 kg, lifting and transporting to be used
auxiliaries (lifts, etc.).
If you need to return, Use the original packaging for safe transportation. Dispose of the
transport packaging (See page 72).
7. ASSEMBLY
Unpack the electric Furnace and place it in the location prepared for its operation. Gently flip
the Furnace and at the bottom part (Pic.8) screw in the feet (Pic.9). Put in the bottom plate (-
es) (Pic. 10) to the chamber. Voltage specified in technical specification chart (see. p. 33) must
correspond to the rated voltage of the supply network.
Before connecting to the mains, check the serviceability of the cord, plugs and sockets with
a grounding contact. Check the serviceability of the electrical socket with the grounding
contact. Insert a plug into the socket outlet.
Do not position the furnace in a manner that would make it difficult to operate your main
power disconnect switch.
Picture 5
Picture 6
Picture 7
Picture 8
Picture 9
Picture 10

10
Prepare the place where the Furnace will be used.
8. PREPARATION FOR USE
The Furnace should be dried before using it for the first time or if it has been out of operation
for a long period of time and stored in humid conditions. It should be dried as follows:
-without load, heat the Furnace until it reaches a temperature ranging from 100-150C
and maintain this temperature range for 2-3 hours;
-heat up to the nominal temperature. Maintain for 1-2 hours.
The dried Furnace can now be operated.
While drying, some ‘smoke’may appear but it has no effect on further operation of the electric
Furnace.
9. OPERATION
Open the door of the electric Furnace.
Put the load on the bottom plate (-s) at least 1/10 of the space away from the side walls to
ensure a better circulation of air.
When putting or taking off the charge do not damage thermocouple, mounted in the chamber.
The data indicated in technical specifications refer to the working space.
-The supporting surface, where the Furnace will be placed on, must be
smooth and non-combustible.
-To prevent damage to the floor covering or the risk of fire if a hot object falls
during removal from the chamber, the floor covering in the working area of
the Furnace must be non-combustible.
-The Furnace must be installed at a safe distance from the surrounding
surfaces:-The minimum distance from the rear and side surfaces of the
Furnace to flammable surrounding surfaces is L = 0.5 m;
-The minimum distance from the top surface of the Furnace to
flammable surrounding surfaces is L1 = 1 m;
-The minimum distance from the rear and side surfaces of the
Furnace to non-combustible surrounding surfaces can be reduced to
L = 0.2 m;
-The minimum distance from the rear surface of the Furnace with a
ventilation hole or chimney in the rear wall to the surrounding
surfaces L = 1 m;
In individual cases, safety distances must be adapted to the environment and
larger distances must be selected.
The room where the Furnace is installed must have a good ventilation
system. Working with the processes that emit vapors, fumes, etc. in addition,
we recommend installing hoods or connecting the furnace chimneys to the
ventilation system as shown in the figure.

11
A, B, C –dimensions of the chamber;
a, b, c –spaces between the walls and the load;
a= A x 0,1
b= B x 0,1
c= C x 0,1
Working volume (space)
V = (A-2a) x (B-2b) x (C-2c)
Close the electric Furnace’s door.
Turn the switch (Pic.11, Pic.12) on. The light indicates that the Furnace is switched on
(just in Pic. 11).
Set the necessary program by following the instruction of the temperature controller.
If the Furnace is equipped with a switch, as shown in Fig. 12, by pressing the red button,
you can close the switch in the off position (Fig. 13).
After end of the work turn off the Furnace.
10. MAINTENANCE
The electric Furnace should be disconnected from the mains (power supply) and
cooled.
Door
adjustment
Open the door and loosen the door hinge fastening screws. Move the door to chamber
and clamp the screw. Close the door and check the door position. There must be no
gaps between the chamber gasket and the door and should close tightly. If gaps
remain –repeat the procedure.
Change of
fuse
Press the holder of the fuse, turn anticlockwise and take out from the socket. Change a
burnt-out fuse. Screw in the holder of the fuse in the reverse order. Ensure the fuse
holder is firmly tightened.
Once every
six months
Once every six months examine visually the wires and electrical connections. If
necessary, tighten the contact screws.
Cleaning
When an operation is completed, clean the external surfaces of the electric Furnace,
except for the markings, with a water-dampened piece of cloth. Clean out the scale
from the heating chamber with a water-dampened piece of cloth. If there is necessity
clean the vents with a vacuum cleaner.
You are responsible for the correct boot sterilization.
Picture 11
Picture 12
Picture 13

12
Before cleaning or sterilization (in addition to what is recommended by the manufacturer),
the user must make sure that his chosen method of sterilization and cleaning products will not
damage the equipment.
11. STORAGE
Store the electric Furnace in its packaging in a location that meets the following requirements:
-heated and naturally ventilated room with an ambient temperature ranging from +5 to +35C;
-atmosphere with sulphurous gas concentration not exceeding 0,13 mg/m³ and chlorine salts
concentration not exceeding 0,3 mg/m² per 24 hours;
- the ambient relative air humidity should not exceed 80at the temperature of 25C.
During loading and unloading of the Furnace, protect it from any shocks.
12. TRANSPORTATION
The electric Furnace should be transported only in closed means of transport in which the
temperature ranges from - 50 to + 50C; at the temperature of +25C, the ambient relative air
humidity must not exceed 80.
You can transport the electric Furnace by any means of closed transport, but protect it from
any rough, jarring movements. The packaging does not protect the electric Furnace from the
effects of improper handling.
The chamber must be empty when the furnace is transported. Remove shelves, bottom
plates or container, etc. These accessories can cause severe damage to the furnace
13. WARRANTY
The manufacturer guarantees that the electric Furnace meets company standards.
The Furnace is guaranteed for 12 months from the date of purchase provided that the user
follows the instructions regarding the Furnace’s storage, transportation and usage. However,
the guarantee does not extend more than 24 months beyond the Furnace’s manufacture date.
Manufacture defects that appear during the warranty period shall be repaired at the
:manufacturer’s expense. The manufacturer’s address
Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] ,3
[email protected]
14. TROUBLESHOOTING
Problem
Possible Cause
Solution
The Furnace doesn’t
turn on.
There is no rated power supply voltage;
The fuse is burnt out.
Check the power supply;
Change the fuse.
The Furnace doesn’t
heat up.
The temperature controller is not switched
on;
Damaged heating element;
Damaged thyristor relay.
Switch on temperature controller;
Change heating element;
Change thyristor relay
Heating time is longer
than expected.
Low voltage of the power supply;
Door does not maintain a hermetic seal.
Check the power supply’s voltage;
Tighten the door’s closure.
Temperature fluctuation
or large over-shoot of the
set temperature.
Temperature Controller requires control
terms tuning.
Perform an Auto-tune (AT) on the
temperature controller (look at
temperature controller instructions).

13
*If after switching on the protective device it triggers again, the Furnace must not be
operated. In that case the manufacturer or the manufacturer ‘s representative should be
addressed for the repairs of the Furnace.
In order to continually improve our products and their usage, supplements to this
publication may be introduced without notice.
15. ASSESSMENT TECHNIQUE OF THE PARAMETERS
TESTED PARAMETERS:
1. Verification of nominal temperature and temperature stability without charge,
2. Measurement of temperature distribution
TEST METHODS
All tests are performed when the electric Furnace is heated to the nominal temperature
set point and operates in the established temperature mode.
Before measuring the temperature stability, it is necessary to select the PID parameters
of the temperature controller (see User Manual of temperature controller).
1. Verification of nominal temperature and temperature stability is performed without charge.
In the cold Furnace, the control thermocouple is fastened as close to the working
thermocouple as possible. The nominal temperature is set at the temperature controller. When
the Furnace is heated and the thermodynamic equilibrium is settled, the control points of the
thermocouple are recorded in the interval of not less than 1 hour, every 60 seconds (but not at
longer intervals). The arithmetic mean of these values is the measured value of the nominal
temperature.
The maximum (positive and negative) temperature deviations from the average
temperature are temperature stability.
2.The temperature distribution is measured by thermocouples with the recorder. The
thermocouples are positioned at the corners of the chamber, from surfaces at a distance of 0.1
edge lengths, and in the center. At least five thermocouples are used. The nominal thermal
temperature is set. When the Furnace is heated and the thermodynamic equilibrium stabilizes,
the temperature is captured. The result is calculated according to the formula:
Where:
T - temperature distribution, oC;
Tmax - is the maximum temperature obtained during measurement at one of the points, oC;
Tmin- is the minimum temperature obtained during measurement at one of the points, oC;

33
46TTECHNICALSPECIFICATIONS
Model
Volume
T max.C
Power, kW
Weight ,kg
Phase
Dimensions of the chamber,mm
Dimenions of the Furnace,mm
Environment in the chamber
Warm –up time to rated temperature,
withought charge , not more than
Temperaturedistribution in the thermal
regime of well –established, withought
charge, оC
Open heating elements
WDHWDHAir
1100 oC
MSF 11-3
3
1100
1,8
17
1
120
200
105
345
470
430
+
35
±10
±2
+
-
MSF 11-8
8,2
1,8
28
1
195
310
135
445
660
495
+
50
+
-
MSF 11-8 VER2
8,2
1,8
28
1
195
310
135
440
530
495
+
50
+
-
MSF 11-8 VER3
8,2
1,8
28
1
195
310
135
440
580
495
+
50
+
-
MSF 11-13
13
1,8
36
1
220
335
170
505
685
555
+
50
+
-
MSF 11-22
22
3
58
1
280
500
160
605
855
620
+
50
+
-
MSF 11-40
39
6
75
3
320
495
230
655
890
740
+
50
+
-
1300 oC
MSF 13-6.7
6,7
1300
2,4
35
1
145
310
135
445
575
525
+
75
±10
±2
-
+
MSF 13-10
10
2,4
39
1
190
335
170
500
710
560
+
50
-
+
MSF 13-30
30
4,6
120
1
200
440
290
640
870
840
+
150
-
+
In the tables are provided the technical parameters of basic models
Furnaces with muffle chambers
Temperature fluctuations in steady-state,
without charge, oC
Closed heating elements

34
Model
Volume
T max.C
Power kw
Weight, kg
Phase
Dimensions of the chamber,mm
Dimenions of the Furnace, mm
Environment in the chamber
, Warm –up time to rated temperature
.withought charge , not more than, min
Temperature distribution in the thermal
regime of well –established, withought
charge, оC
Temperature fluctuations in steady-state,
without charge, oC
Closed heating elements
Open heating elements
WDHWDHAir
900 oC
MSF 9-4
4
3,7
41
1
120
295
110
440
615
500
+
100
+
-
MSF 9-7.2
7,2
900
3,3
50
1
195
295
120
440
575
510
+
130
+
-
MSF 9-12
12
4,5
120
1
215
295
195
640
760
825
+
110
±10
±2
+
-
MSF 9-15
15
6
130
3
215
400
195
640
815
820
+
100
+
-
1100 oC
MSF 11-4
4
3,7
41
1
120
295
110
440
615
500
+
110
±10
-
+
MSF 11-7.2
7,2
1100
3,3
50
1
195
295
120
440
575
510
+
150
±2
-
+
MSF 11-12
12
4,5
120
1
215
295
195
640
760
825
+
130
-
+
MSF 11-15
15
6
130
3
215
400
195
640
815
820
+
120
-
+
1200 oC
MSF 12-4
4
1200
3,7
41
1
120
295
110
440
615
500
+
120
±10
±2
+
-
MSF 12-7.2
7,2
3,3
103
1
195
295
120
440
575
510
+
240
+
-
MSF 12-12
12
4,5
120
1
215
295
195
640
760
825
+
140
+
-
MSF 12-15
15
6
130
3
215
400
195
640
815
820
+
130
+
-
1300 oC
MSF 13-4
4
1300
3,7
41
1
120
295
110
440
615
500
+
140
±10
±2
-
+
MSF 13-7.2
7,2
3,3
103
1
195
295
120
440
575
510
+
240
-
+
MSF 13-12
12
4,5
120
1
215
295
195
640
760
825
+
150
-
+
MSF 13-15
15
6
130
3
215
400
195
640
815
820
+
140
-
+
Furnaces with ceramic chambers

35
4747ELECTRICAL PRINCIPLE SCHEME
MSF 11-3/11-8/11-13

36
MSF 11-3/11-8/11-13

37
MSF 11-3/11-8/11-13

38
MSF 11-3/11-8/11-13

39
MSF 11-3/11-8/11-13

40
MSF 11-3/11-8/11-13

41
/MSF 9-4/MSF 11-4/MSF 12-4/MSF 13-4/MSF 9-7.2/MSF 11-7.2