WELBA MRF-M2 User manual

1. Introduction
106082 –MRF-M2 -E -V0.7 - 23.04.2021 Page 1
Milk temperature regulator
MRF-M2
Installation and operating instructions
for plant engineering companies,
installers and service engineers
Firmware V0.7
Measuring - Controlling - Regulating
All from the same source
Programmable via
configuration software
WELBA „KONSOFT"

1. Introduction
Page 2106082 –MRF-M2 -E -V0.7 - 23.04.2021
1. Introduction................................................................................................................................................ 4
1.1 Information about this operating instructions ................................................................................ 4
1.2 Limitation of liability ....................................................................................................................... 5
1.3 Warning notices in these operating instructions............................................................................ 5
1.4 Model / type plate.......................................................................................................................... 6
1.5 Items supplied ............................................................................................................................... 6
1.6 Disposal......................................................................................................................................... 7
1.7 Cleaning instructions..................................................................................................................... 7
1.8 Dimensions.................................................................................................................................... 7
1.9 Technical data regulator................................................................................................................ 8
1.10 Sensor dimensions und technical data sensor.............................................................................. 9
2. Safety ...................................................................................................................................................... 10
2.1 General Information..................................................................................................................... 10
2.2 Intended use................................................................................................................................ 11
2.3 Wiring, screening, earthing.......................................................................................................... 12
2.4 Electrical safety ........................................................................................................................... 12
3. Installation ............................................................................................................................................... 13
3.1 Location and climatic conditions.................................................................................................. 13
3.2 Unpacking and storage ............................................................................................................... 13
3.3 Installation of housing.................................................................................................................. 13
3.4 Fitting the sensor......................................................................................................................... 14
3.4.1 Changing the sensor cable length............................................................................................... 14
4. Electrical connection ............................................................................................................................... 15
4.1 Safety during installation ............................................................................................................. 15
4.2 Procedure.................................................................................................................................... 15
4.3 Wiring / circuit diagram................................................................................................................ 16
4.3.1 Wiring the digital input................................................................................................................. 16
5. Operating................................................................................................................................................. 17
5.1 Function overview........................................................................................................................ 17
5.1.1 OFF mode (Stand-by).................................................................................................................. 17
5.1.2 Cooling mode .............................................................................................................................. 17
5.1.3 Continuous stirring mode ............................................................................................................ 17
5.2 The configuration software KONSOFT........................................................................................ 18
5.3 Operation in levels....................................................................................................................... 19
5.4 Operation of working level........................................................................................................... 20
5.4.1 Button functions........................................................................................................................... 20
5.4.2 Meaning of the LED‘s .................................................................................................................. 21
°C
T1
T2
T1 T2
OFF
SET

1. Introduction
106082 –MRF-M2 -E -V0.7 - 23.04.2021 Page 3
5.5 Explanation of the operating modes ............................................................................................22
5.5.1 OFF mode (Stand-by).................................................................................................................22
5.5.2 Cooling mode...............................................................................................................................22
5.5.3 Continuous stirring mode ............................................................................................................23
6. Setting of parameters...............................................................................................................................24
6.1 Change and save parameter values............................................................................................24
6.1.1 Enter the level code .....................................................................................................................24
6.1.2 Display and change parameter value ..........................................................................................25
6.1.3 Save parameters and return to working level ..............................................................................25
6.2 Level “Cooling parameters 1” (C-Parameter)........................................................................26
6.3 Level “Cooling parameters 2” (P parameters).......................................................................28
6.4 Level “Hardware configuration” (A parameters).......................................................................31
6.5 Level “I / O test parameters” (o. parameters).......................................................................32
7. Other information .....................................................................................................................................33
7.1 Fault messages............................................................................................................................33
7.2 Function “intermediate agitating” in cooling mode [P22].............................................................34
7.3 Emergency cooling in the event of a sensor fault........................................................................34
7.4 Compressor fault monitoring [P72]...............................................................................................35
7.5 Milk cooling tank lid open in cooling mode...................................................................................36
7.6 Sensor correction procedure........................................................................................................36
7.7 Topic “Protection against icing“....................................................................................................37
7.7.1 Different variants for cooling start delay.......................................................................................37
7.7.2 Anti-icing protection by switching off the compressor with a robot ..............................................38
7.7.3 Anti-Icing protection by means of low pressure monitoring .........................................................38
7.8 Procedure following power failure................................................................................................39
7.9 RS485 interface ...........................................................................................................................39
7.10 General measures when using electronic control systems..........................................................40
Publisher:
Welba GmbH
Electronic Control Engineering
Gewerbepark Siebenmorgen 6
D-53547 Breitscheid
Fon:
Fax:
+49 (0)2638 / 9320-0
+49 (0)2638 / 9320-20
[e-mail]
www.welba.de

1. Introduction
Page 4106082 –MRF-M2 -E -V0.7 - 23.04.2021
1. Introduction
1.1 Information about this operating instructions
These operating instructions are intended for the use by plant engineers, installers
or service technicians of the MRF-M2 milk temperature regulator. This manual con-
tains all necessary suggestions, information, recommendations and advice for the
safe and proper installation and commissioning of the milk temperature regulator. It
is only with the knowledge of this operating instruction that errors at the regulator
can be avoided and a trouble-free operation is guaranteed.
Read the assembly instructions carefully and adhere to the recommendations de-
scribed in order to ensure proper operation. In addition, the local accident preven-
tion regulations and general safety regulations are to be observed for the field of
application of the milk temperature regulator.
When delivered, the parameterization of the MRF-M2 does not neces-
sarily correspond to the intended use. This must be adjusted accord-
ingly during the installation.
Basically, the installer of the system is responsible for the commis-
sioning of the regulator.
Operation instruction for the operator
The plant engineers, the installer or the service technician must prepare operating
instructions for the operator of the milk temperature regulator (farmer). In this case
the parameterization of the delivery state must be clearly documented.
We recommend to only document those parameters which the operator of the regu-
lator needs.
When preparing the operating instructions for the operator the local regulations have
to be observed - see chapter “Safety”.
These operating instructions include important technical and safety
information. It is vital to carefully study all these instructions before the
installation of the regulator or in case of any other work with the
regulator!
The manufacturer accepts no liability for errors and reserves the right to make tech-
nical changes at any time. All rights reserved.
NOTICE for storing the operating instructions
Diese Bedienungsanleitung ist Produktbestandteil und muss in der Nähe des Milch-
temperatur-Reglers für den Servicemonteur jederzeit zugänglich aufbewahrt wer-
den.
WELBA „KONSOFT"
The free of charge configuration Software KONSOFT provides a simple parameter-
ization and updating of the milk temperature regulator as well as a comfortable eval-
uation of the determined data.
See also section 5.2
WARNING
NOTICE
NOTICE

1. Introduction
106082 –MRF-M2 -E -V0.7 - 23.04.2021 Page 5
1.2 Limitation of liability
The proper function of the MRF-M2 depends on many external factors
on which the manufacturer has no influence. The manufacturer accepts
no liability for any damages on the milk cooling tank, the connected
components or the milk.
All information and instructions in this manual have been compiled taking into ac-
count the applicable standards and regulations, the state of the art and our long-term
experiences.
These instructions have been compiled with maximum care and attention. However,
their content does not constitute an assurance of product features.
The manufacturer accepts no liability for errors and reserves the right to make tech-
nical changes at any time. All rights reserved.
WELBA GmbH does not assume any liability for damages due to:
- Non-observance of the installation instruction
- Improper use
- Installation by unqualified staff
- Non-approved outdoor installation
- Unauthorized modifications
- Technical modifications
Otherwise, our general terms and conditions as well as the terms of delivery of
WELBA GmbH and the legal regulations valid at the time of conclusion of the con-
tract are applicable.
We reserve the right to make technical changes in the context of improving the prop-
erties of use and further developments.
1.3 Warning notices in these operating instructions
Important safety information in these assembly instructions are identified by sym-
bols. These instructions on occupational safety must be adhered to and followed. In
these cases, behave particularly carefully in order to avoid accidents, personal injury
and property damage.
In addition to the information in these assembly instructions, the general and local
safety and accident prevention regulations must also be observed and instructed!
Nature and source of danger
This warning signs warns of an imminent danger to health and life of people. Failure
to comply with this warning will result in extremely serious injuries, including death.
Nature and source of danger
This warning signs warns of a possibly dangerous situation for the health of people.
Failure to observe these warning notices can result in serious injuries, including
death.
Nature and source of danger
This warning sign warns of a possibly dangerous situation for the health of people.
Failure to observe these warnings can lead to minor or moderate injuries.
Note
General notes contain application tips and particularly useful information, but no
warnings about dangers.
WARNING
DANGER!
ATTENTION
NOTICE
WARNING

1. Introduction
Page 6106082 –MRF-M2 -E -V0.7 - 23.04.2021
1.4 Model / type plate
These instructions apply to all controllers in the series MRF-M2.
The type designation and the exact connection diagram for your controller can be
found on the controller as a connection sticker.
Example:
Controller type designation:
and
1.5 Items supplied
- Milk temperature regulator MRF-M2
- Accompanying documentation
- Holder
- Rubber seal
- Temperature sensor TF1A-2
- Fixing screws
- Optional accessories that may have been ordered

1. Introduction
106082 –MRF-M2 -E -V0.7 - 23.04.2021 Page 7
1.6 Disposal
For the purposes of disposal, the device is classified as waste electronic equipment
within the meaning of European Directive 2002/96/EC (WEEE) and must not be in-
cluded with household waste. It must be disposed of through the correct channels.
Local and current legislation must be observed.
1.7 Cleaning instructions
The enclosure front (front foil) can be cleaned with usual detergents.
ATTENTION: The enclosure front is not resistant to aggressive acids
and alkalis, abrasive cleaners and cleaning with high-pressure
cleaners!
The use of these cleaners and cleaning methods may lead to damages!
1.8 Dimensions
Front panel cutout
87 x 56 mm
NOTICE

1. Introduction
Page 8106082 –MRF-M2 -E -V0.7 - 23.04.2021
1.9 Technical data regulator
Operating voltage
230V AC +/-10%, 50/60 Hz
Relay contact
2 power relay
max. switching current
K1 = 12A AC1 - 230V AC
K2 = 10A AC1 - 230V AC
max. switching voltage
250V AC - 50..60 Hz
Display
13 mm LED-Display, 3 digits
Display range
-99 .. 999
Switching status displays
3 mm LED
Number of sensor inputs
1
Type of sensor
KTY 81-210
Sensor cable length
2 metres
Measurement range
-20° .. +120°C
Temperature resolution
0.1°C
Control mode
two-step controller
Hysteresis
0,1 K .. 10 K (standard adjusting 0,7 K)
Target temperature T1*
Target temperature T2*
standard adjusting 4°C
standard adjusting 4°C
Agitator
- Rest time (interval) *
- Agitating time*
standard adjusting 20 min.
standard adjusting 2 min.
Digital input
1
Interface
RS-485
Connection
Plug-in screw connections
for cables up to 2.5 mm²
Housing
- Front dimension
- Front panel cutout
- Insertion depth
86 x 106 mm
56 x 87 mm
38 mm
Protection
- Housing front
- Rear
The control is open on the rear, as it is designed
for installation in a closed housing.
IP 64
IP 00
Electrical safety
Protection class II,
Overvoltage category III, pollution degree I
Environment specifications:
- Operation temperature
- Storage temperature
- max. humidity
0° .. +50°C
-20° .. +70°C
75% (no dew)
Pollution degree
Electrically conductive pollution must not enter
the housing interior
* = freely adjustable
Technical data subject to change.

1. Introduction
106082 –MRF-M2 -E -V0.7 - 23.04.2021 Page 9
1.10 Sensor dimensions und technical data sensor
In contrast to our standard sensors, we also offer sensors with other
sleeve shapes and diameters or other cable lengths.
Sensor element
KTY 81-210
Bush material
1.4301 (V2A)
Bush length
40 mm
Bush diameter
6,0 mm +/- 0.1
Cable material
PVC
Measurement range
-10 .. 70° C
Cable length
standard 2 metres
40 mm
6,0 mm 6,1 mm

2. Safety
Page 10 106082 –MRF-M2 -E -V0.7 - 23.04.2021
2. Safety
2.1 General Information
The plant engineering company, the installer or the service engineer
must prepare operating instructions for the operator, taking account of
the controller's parameters as supplied.
We recommend referring only to the parameters which the end user
needs for safe operation.
In preparing the operating instructions for the end user, especially the
chapter on “Safety”, account must be taken of local regulations.
IMPORTANT NOTE
The parameter settings of the MRF-M2 as supplied do not correspond
to the intended use. This can lead to undefined behaviour by individual
components when the system is commissioned.
The general principle is that the plant constructor is responsible for
putting the regulator into operation.
These operating instructions contain important technical and safety
information. Please read carefully before installation and before any
work on or with the regulator.
It is the duty of the party commissioning the system to ensure
compliance with the following guidelines.
The regulator may only be installed by an authorised electro specialist,
observing all local safety requirements.
Access to the environment when connected must be restricted to
specialised personnel.
The regulator contain live components. They must be built into the
plant in such a way that contact with such live components is
impossible.
The regulator is not suitable for use in explosive atmospheres. Danger
of explosion. Use only outside areas subject to explosive atmospheres.
The regulator must not be used if the housing or connection terminals
are damaged.
No fluids must penetrate the housing.
The regulator may not be exported to the USA without the
manufacturer's express permission!
WARNING
WARNING