Sorel MTDC Installation And Operating Instructions Manual
Temperature difference controller
versions 5
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Summary of Contents for Sorel MTDC
- Page 1 Temperature Difference Controller MTDC Installation and operating instructions Read carefully before installation, commissioning and operation!
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Page 2: Table Of Contents
Content A. - Safety instructions 6. - Special functions EC declaration of conformity 6.1. - Program selections General instructions 6.2. - Signal V1 Explanation of symbols 6.2.1. - Type of pump Changes to the unit 6.2.2. - Pump Warranty and liability 6.2.3. - Page 3 This manual applies to the hardware MTDC versions 5, January 2015 When you are unsure which version you have, check the type label on the side of the controller. MTDC Version 5 AC 100...240V, 50/60Hz, 460VA If the version is not readable here, open the controller’s “Service values” menu.
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Page 4: Safety Instructions
Safety instructions EC declaration of conformity By affi xing the CE mark to the unit the manufacturer declares that the Temperature- Difference-Controller MTDC , conforms to the following relevant safety regulations: EC low voltage directive 2006/95/EC EC electromagnetic compatibility directive 2004/108/EC Conforwithy has been verifi ed and the corresponding documentation and the EC de- claration of conforwithy are kept on fi le by the manufacturer. -
Page 5: Changes To The Unit
Safety instructions Changes to the unit Changes to the unit can compromise the safety and function of the unit or the entire system. Danger Changes, additions to or conversion of the unit are not permitted without the writ- ten permission from the manufacturer It is likewise forbidden to install additional components that have not been tested together with the unit If it becomes clear that safe operation of the unit is no longer possible, for exam-... -
Page 6: Description Of Controller
Description of controller Specifications Electrical specifications: Mains voltage 100 - 240VAC Mains frequency 50 - 60Hz Power consumption 0,5W - 2,5W Internal fuse 2A/250V slow blow Protection category IP40 Protection class Overvoltage Category Degree of Pollution Category mechanical relay 460VA for AC1 / 460W for AC3= 2 (R1) 2 (R1/R2) 0-10V output, tolerance 10%, 10 k Ω... -
Page 7: About The Controller
The controller menu contains headwords for the measured values and settings, as well as help texts or clearly-structured graphics. The MTDC can be used as a temperature difference controller for the various system variants illustrated and explained under B.5. Important characteristics of the MTDC : •... -
Page 8: Installation
Installation Wall installation Install the controller only in dry areas and under the ambient conditions de- scribed under B.1 “Specifi cations”. Carry out the following steps 1-8. Caution 1. Unscrew cover screw completely C.1.1 2. Carefully pull upper part of housing from lower part. -
Page 9: Electrical Connection
Installation Electrical connection Before working on the unit, switch off the power supply and secure it against being switched on again! Check for the absence of power! Electrical connections may only be made by a specialist and in compliance Danger with the applicable regulations. -
Page 10: Installing The Temperature Sensors
Installation 1.Select necessary program/hydraulics C.2.1 (Resp. D.1 - Hydraulic variants) 2.Strip cables by 55 mm max., insert, fi t the strain relief devices, strip the last 8-9mm of the wires (Fig. C.2.1) 3.Open the terminals using a suitable screwdriver (Fig. C.2.1) and make electri- cal connections on the controller (s. -
Page 11: Terminal Connection
Installation D. - Terminal connection diagram Low voltage Main voltage max. 12V 230VAC Caution Danger CAN CAN VFS2 VFS1 PELV On the Controller platine: CAN1 CAN Bus connection CAN2 CAN Bus connection Low voltage Main voltage max. 12V 230VAC Gefahr Achtung Low voltage max. -
Page 12: Hydraulic Variants
Description of controller Hydraulic variants The following illustrations should be viewed only as schematic diagrams showing the respective hydraulic systems, and do not claim to be complete. The controller does not replace safety devices under any circumstances. Depending on the specifi c application, additional system Caution components and safety components may be mandatory, such as check valves, non-return valves, safety temperature liwithers, scalding protectors, etc., and must therefore be provided. - Page 13 Description of controller Hydraulic variants R1(V1) R1(V1) R1(V1) Solar with 2 collector surfaces and switching Solar with bypass Solar with heat exchanger valve R1(V1) R1(V1) R1(V1) Solar with 2 collector surfaces and 2 pumps Solar with 2 storages and switching valve Solar with 2 storages and 2 pumps R1(V1) R1(V1)
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Page 14: Operation
Description of controller Hydraulic variants R1(V1) R1(V1) R1(V1) Solar with cooling 3 (collector cooling) Solar with storage and solid-fuel boiler and S4 2x Solar Auxiliary Heat Solid-fuel 3-way valve Collector heating Pump exchanger boiler R2 on Storage Flow Valve Swimming pool Radiator heater Sensor... -
Page 15: Commissioning Help
Parametrisation Commissioning help 1. Set language, time and date 2.a) Start setup wizard (menu 6.8.) The setup wizard guides through the necessary basic settings in the correct order. Every parameter is briefly explained in the display. Pressing the „esc“ key takes you back to the previous setting. -
Page 16: Menu Sequence And Menu Structure
Operation Menu sequence and menu structure The graphics or overview mode appears when no key has been press for 2 minutes, or when the main menu is exited by pressing “esc“. Pressing a key in graphics or overview mode takes you directly to the main menu. The following menu items are then available for selection there: Measurement values 1. -
Page 17: Statistics
Statistics 2. - Statistics The menu “2. Statistics” is used for func- tion control and long-term monitoring of the system. The menu is closed by pressing “esc” or selecting “Exit statistics”. For analysis of the system data it is essential for the time to be set ac- curately on the controller. -
Page 18: Operating Modes
Operating modes 3. - Operating modes In menu “3. Operating modes” the con- troller can either be placed in automatic mode, switched off, or placed in a manual operating mode. The menu is closed by pressing “esc” or selecting “Exit operating modes”. 3.1. -
Page 19: Settings
Settings 4. - Settings The necessary basic settings required for the control function are made in menu “4. Settings”. This does not under any circumstances replace the safety facilities to be provided by the customer! Caution The menu is closed by pressing “esc” or selecting “Exit settings”. -
Page 20: Tmax S2
Settings 4.5. - Tmax S2 Switch-off temperature at sensor 2 If this value is exceeded at sensor 2 and the other conditions are also met, then the controller switches the associated pump and/or valve off. If sensor 2 falls below this value again and the other conditions are also met, then the controller switches the pump and/or valve on again. -
Page 21: Tmax Sb Wt (Pool Heat Exchanger)
Settings 4.14. - Tmax SB WT (pool heat exchanger) Switch-off temperature at heat exchanger sensor If this value is exceeded at the applicable sensor, the controller switches the associat- ed pump and/or valve off. If the temperature falls below this value again and the other conditions are also met, then the controller switches the pump and/or valve on again. -
Page 22: Protective Functions
Protective functions 5. - Protective functions Menu “5. Protective functions” can be used to activate and set various protective functions. This does not under any circumstances replace the safety facilities to be provided by the customer! Caution The menu is closed by pressing “esc” or select- ing “Exit settings”. -
Page 23: Recooling
Protective functions Protective functions 5.3. - Recooling In hydraulic systems with solar when the recooling function is activated excess energy from the storage tank is fed back into the collector. This only takes place if the temperature in the storage tank is higher than the value “Recool Tsetpoint” and the collector is at least 20 °C cooler than the storage tank and before the storage tank temperature has dropped below the value “Recool Tsetpoint”. -
Page 24: Special Functions
Special functions 6. - Special functions Menu “6. Special functions” is used to set basic items and expanded functions. Other than the time all settings may only be made by a specialist. Caution The menu is closed by pressing “esc” or select- ing “Exit special functions”. -
Page 25: 0-10V / Pwm Off
Special functions 6.2.4. - 0-10V / PWM off This voltage is put out when the pump is turned off (Pumps that can detect cable break need a minimum voltage). 6.2.5. - 0-10V / PWM on This voltage is needed to turn the pump on at minimum speed. 6.2.6. -
Page 26: Speed Control
Special functions 6.3. - Speed control With speed control the MTDC makes it possible to vary the speed of connected pumps. This function should only be activated by a specialist. Depending on the pump and pump stage used, the minimum speed should not be set too low, because otherwise the pump or the system may be damaged. -
Page 27: Purging Time
Special functions 6.3.2. - Purging time During this time period, the pump is running with full speed (100%) to ensure trouble- free startup. After this time has passed, the pump is set to speed control and is set to max. speed or min speed, depending on the speed control variant „6.3.1. - Modes“ on page 26 chosen. -
Page 28: Relay Functions
Special functions 6.5. - Relay functions The here explained additional functions can be assigned to unused relays. Every ad- ditional function can only be used once. Pay special attention to the technical data of the relays („B.1. - Specifi cations“). Example System 1 + System 1 +... -
Page 29: Thermostat
Special functions 6.5.2. - Thermostat Thermostat is used for time- and temperature controlled additional heating. Temperature values which are set too high can lead to scalding or damage to the system. Scalding protection must be provided by the Danger! customer! In Energy savings mode, different settings may apply, see e.g. -
Page 30: Cooling
Special functions 6.5.2.8. - Energy saving mode Energy saving mode switches the heating on when T eco is undershot und heats up to T eco + hysteresis when solar charge is active. 6.5.2.9. - Periods Thermostat activity times Set the desired periods of time when the thermostat should be active. 3 periods can be set per day, settings can also be copied to other days. -
Page 31: Field Cooling
Special functions 6.5.4.3. - ∆T return fl ow Switch-on temperature difference: When this difference is exceeded between return fl ow sensor and storage sen- sor, the relay is switched on. Switch-off temperature difference: When this difference is exceeded between return fl ow sensor and storage sen- sor, the relay is switched off. -
Page 32: Anti Legionella
Special functions 6.5.6. - Anti Legionella This function is used to heat up the system during selected periods to eliminate legionella bacteria. 6.5.6.2. - AL T set This temperature has to be detected for the time set in AL residence time at the AL sensors for a successful heat up. -
Page 33: Heat Transfer
Special functions 6.5.7. - Heat transfer This is used to transfer energy from one storage to another with a pump. 6.5.7.2. - Shift Tmin Minimum temperature in source storage to enable the heat transfer. 6.5.7.3. - ∆ T Heat transfer Temperature difference for heat transfer function. -
Page 34: Difference
Special functions 6.5.8. - Difference The relay is switched on when a specific temperature difference (∆ T) is reached. 6.5.8.2. - Diff Tmin Minimum temperature at source sensor to enable the difference relay When the temperature at the source sensor is below this level, the difference function is disabled. -
Page 35: Solid Fuel Boiler
Special functions 6.5.9. - Solid fuel boiler The relay is used to control an additional solid fuel boiler. 6.5.9.2. - SF Tmin Minimum temperature in the solid fuel boiler to switch on the pump. If the tem- perature at the boiler sensor is below this temperature, the relay is disabled. 6.5.9.3. -
Page 36: Parallel Operation R (X)
Special functions 6.5.12. - Parallel operation R (X) The relay is switched on at the same time as the set relay R1 or R2. 6.5.12.2. - Delay This menu determines how long after the start of R1 or R2 the parallel relay is switched on. -
Page 37: Heat Quantity
Special functions 6.6. - Heat quantity 6.6.1. - Constant fl ow When the heat meter mode „Flow rate“ is selected, an approximated heat quantity is calculated using the values the user has to enter. These are type of glycol/AntiFreeze, glycol portion and fl ow rate. These values are put into correlation with the temperature data of collector sensor and storage sensor. -
Page 38: Sensor Calibration
Special functions 6.7. - Sensor calibration Deviations in the temperature values displayed, for example due to cables which are to long or sensors which are not positioned optimally, can be compensated for manually here. The settings can be made for each individual sensor in steps of 0.8 °C (tempera- ture) resp. -
Page 39: Time And Date
Special functions 6.11. - Time and date This menu is used to set the current time and date. For analysis of the system data it is essential for the time to be set accu- rately on the controller. Please note that the clock does not continue to run if the mains voltage is interrupted, and must therefore be reset. -
Page 40: Menu Lock
Menu lock 7. - Menu lock Menu “7. Menu lock” can be used to secure the controller against unintentional changing of the set values. The menu is closed by pressing “esc” or selecting “Exit menu lock”. The menus listed below remain completely accessible despite the menu lock being activated, and can be used to make adjustments if necessary: Measurement values Analysis... -
Page 41: Service Values
Service values 8. - Service values The menu “8. Service values” can be used for remote diagnosis by a specialist or the manufac- turer in the event of an error, etc. Enter the values at the time when the error occurs e.g. in the table. Caution The menu can be closed at any time by press- ing “esc”. -
Page 42: Language
Language 9. - Language Menu “9. Language” can be used to select the language for the menu guidance. This is queried automatically during initial commis- sioning. The choice of languages may differ, how- ever, depending on the device design. Language selection is not available in every device design! -
Page 43: Malfunctions
Malfunctions Z.1. Malfunctions with error messages If the controller detects a malfunction, the red light fl ashes and the warning symbol also appears in the display. If the error (LED fl ashes + is no longer present, the warning symbol warning symbol) changes to an info symbol and the red light no longer fl ashes. -
Page 44: Replacing The Fuse
Malfunctions Replacing the fuse Repairs and maintenance may only be performed by a specialist. Before working on the unit, switch off the power supply and secure it against being switched on again! Check for the absence of power! Danger Only use the supplied spare fuse or a fuse of the same design with the following specifi cations: T2A 250V Danger If the mains voltage is switched on and... -
Page 45: Maintenance
Malfunctions Maintenance In the course of the general annual maintenance of your heating system you should also have the functions of the controller checked by a spe- cialist and have the settings optimised if necessary. Caution Performing maintenance: - Check the date and time (see „6.11. - Time and date“) - Assess/check plausibility of analyses (see „2. -
Page 46: Can-Bus
Additional Information CAN-Bus The CAN bus can be used to connect two or more controllers with each other or with the data logger to exchange data. Controller 1 Controller 2 Controller 3 Datalogger (valgfrit) Controller n 1. The controllers are connected in series with the CAN bus cable (1). 2. - Page 47 Tips & Tricks Instead of setting the flow rate for the system using a flow rate limiter, it is better to adjust the flow rate using the switch on the pump and by means of the “max. speed” setting on the controller (see 6.3.4). This saves electricity! The service values (see 8.) include not only current measurement values and operating states, but also all of the settings for the controller.
- Page 48 Subject as a basic principle to errors and technical changes. Your specialist dealer: Manufacturer: SOREL GmbH Mikroelektronik Jahnstr. 36 D - 45549 Sprockhövel Tel. +49 (0)2339 60 24 +49 (0)2339 60 25 www.sorel.de...
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Questions and answers
red light flashing and message says faulty sensor, renewed sensor but fault still there
A faulty sensor issue on the Sorel MTDC controller is indicated by a flashing red light and a warning symbol. To fix this issue:
1. Press the key under the warning or info symbol to get more details about the error.
2. Do not attempt to fix it yourself. Consult a specialist.
3. The issue may be caused by a defective sensor, a faulty sensor input at the controller, or a damaged connecting cable.
4. A specialist should check the sensor and its connections. If necessary, they should replace the sensor or repair the wiring.
5. Refer to the resistance table (B.1) for sensor diagnostics if needed.
Always ensure power is switched off before any maintenance.
This answer is automatically generated