Sorel LTDC Installation And Operating Instructions Manual
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Sorel LTDC Installation And Operating Instructions Manual

Temperature difference controller
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Temperature difference controller LTDC
Installation and operating instructions
Read carefully before installation, commissioning and operation

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Summary of Contents for Sorel LTDC

  • Page 1 Temperature difference controller LTDC Installation and operating instructions Read carefully before installation, commissioning and operation...

  • Page 2: Table Of Contents

    Explanation of Symbols Hysteresis Changes to the Unit Thermostat sensor 1 Warranty and Liability Thermostat sensor 2 Disposal and Pollutants T eco Energy Saving Mode Description LTDC Thermostat enable About the Controller Cooling Specifications Tset Scope of supply Hysteresis Hydraulic Variants...
  • Page 3 Flow temperature sensor (X) Return flow sensor Glycol type Glycol percentage Flow rate supply flow (X) Offset ∆T VFS (X) VFS - Position Reference sensor Sensor Calibration Commissioning Factory Settings Time & Date Starting aid Purging time Increase Global radiation sensor Radiation sensor Radiation intensity Blocking time...

  • Page 4: Safety Instructions

    Safety Instructions EU-Conformity By affixing the CE mark to the unit the manufacturer declares that theLTDC conforms to the following relevant safety regulations: EU low voltage directive 2014/35/EU EU electromagnetic compatibility directive 2014/30/EU conforms. Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer.

  • Page 5: Changes To The Unit

    About the Controller The Solar multi-circuit controller LTDC facilitates efficient use and function control of your solar or heating system possible while its handling is intuitive. After every input step the suitable functions are matched to the keys and explained in a text above. In the menu 'measurement values and settings' are help text and graphics in addition to key words.

  • Page 6: Specifications

    Scope of supply Solar multi-circuit controller LTDC 3 screws 3,5 x 35 mm and 3 plugs 6 mm for wall installation. 6 strain relief clips with 12 screws, replacement fuse 1x T2A / 250 V LTDC Installation and operating instructions...

  • Page 7: Hydraulic Variants

    Optionally contained depending on design/order: CAN Bus Accessories: Datalogger with Ethernet connection External relay for V1 / V2: Switching relay 250 VAC 6W, control voltage 9 - 12 VDC Hydraulic Variants The following illustrations should be regarded only as schematic representations of the respective hydraulic systems and do not claim to be complete.
  • Page 8 Solar with 2 collector surfaces and 2 Solar with 2 storages and switching Solar with 2 storages and 2 pumps pumps valve Solar with storage transfer Solar with pool and heat exchanger Solar with thermostat and switching valve Solar and solid-fuel boiler Solar with cooling 1 (collector cooling) Solar with cooling 2 (collector cooling) Solar with cooling 3 (collector cool-...
  • Page 9 increase 2 storages and 2 valves Solar with 2 collector surfaces, 2 stor- Solar with pool, storage and heat Solar with 3 storages and 3 pumps ages and 2 pumps exchanger Solar with heat exchanger Solar with heat exchanger, two-zone Solar with 3 storages and 3 switching storage and valve valve...

  • Page 10: Installation

    Electrical Terminals Low voltage Mains voltages max. 12 VAC / DC 230 VAC 50 - 60 Hz On the control board LTDC Version V3 + V4: VFS1 Grundfos Direct Sensor VFS2 Grundfos Direct Sensor LTDC Version V1 + V4: CAN bus connection (1=high,2=low)

  • Page 11: Wall Installation

    Wall Installation 1. Unscrew cover screw completely. 2. Carefully pull upper part of housing from lower part. During the removal, the brackets are released as well. 3. Set upper part of housing aside Do not touch the electronics. 4. Hold the lower part of the housing up to the selected position and mark the three mounting holes.

  • Page 12: Electrical Connection

    Electrical Connection Before working on the unit, switch off the power supply and secure it against being switched on again! Check that there is no power flowing! Electrical connections may only be made by a specialist and in compliance with the applicable regulations.

  • Page 13: Operation

    Operation Display and Input The display‘s (1), extensive text and graphical mode, enables simple, almost self-explanatory, operation of the controller. The LED (2) lights up green when a relay is switched on. The LED (2) lights up red when operating mode ‚Off‘ is set. The LED (2) flashes quickly red when an error is present.

  • Page 14: Commissioning Help

    Commissioning help 1. Set language and time 2. Commissioning help / setup wizard a) select or b) skip. The setup wizard guides through the necessary basic settings in the cor- rect order. Each parameter is explained in the control display. Pressing the „esc“ key takes you back to the previous setting. b) With free commissioning the settings should be made in the following order: Menu 9.

  • Page 15: Statistics

    2. Statistics Serve for function control and long-term monitoring of the system. For system data statistics it is essential for the time to be set accurately on the controller. Please note that the clock con- tinues to run for about 24 hours if the mains voltage is inter- rupted, and afterward must be reset.

  • Page 16: Operating Mode

    3. Operating mode Automatic The automatic mode is the normal mode of the controller. A correct controller function under consideration of the current tem- peratures and the set parameters is only present in automatic mode! After an interruption of the mains voltage, the controller auto- matically returns to the last operating mode selected.

  • Page 17: Settings

    4. Settings By no means does the controller replace the safety appliances on site! Tmin S1 Enable/start temperature at sensor 1: If this value on the sensor 1 (collector sensor) is exceeded and the other conditions are not fulfilled, the controller will turn on the affiliated pump or the valve.

  • Page 18: Priority Temperature

    Example: if several storages or storage areas in your system are integrated, you can specify a priority for each sensor of the stor- age or the storage area. The "X" in the menu item priority S(X) indicates the sensor of the respective storage or storage area. The priority for the first storage is thus set under priority S2 and for the 2.

  • Page 19: Protective Functions

    5. Protective Functions The 'Protective functions‘ can be used by specialists to activate and set vari- ous protective functions. By no means does the controller replace the safety appliances on site! System protection Priority protection function The system protection should prevent an overheating of the components installed in the system through the forced shut down of the solar circulation pump.

  • Page 20: Collector Alarm

    Collector alarm If this temperature at the collector sensor is exceeded when the solar pump is turned on, a warning or error notification is triggered. There is a corresponding warning in the display. Pressure Monitoring In this menu, the system pressure monitoring can be activated through a direct sensor. Once the set pressure conditions are exceeded, a message is generated and the LED flashes red.

  • Page 21: Purging Time

    Mode M2: The controller changes to the set min. speed after the Speed. If the temperature difference ∆T between the reference sensors is above the set switch on temperature difference ∆T R1, the speed will be increased. If the temperature difference ∆T between the reference sensors is below the set switch on temperature difference ∆T R1, the speed will be reduced.

  • Page 22: Solar Bypass

    Solar bypass Variant In this menu, you can set if the flow is guided through the bypass with a pump or a valve. Bypass sensor The reference sensor for the bypass function to be placed in the flow is selected in this menu. Thermostat Through the thermostat function, additional energy can be added to the system while being time and temperature controlled.

  • Page 23: Periods

    Periods Cooling release times Here the desired periods are set in which the cooling function is approved. For each weekday, three times can be specified, fur- thermore, you can copy individual day to other days. The cooling function is shut down outside of the set release times. Return flow increase With this function, for example, the return temperature of a heating circuit is increased through the storage.

  • Page 24: Heat Transfer

    As soon as it has heated up with “AL” turned on, information with the date will be shown in the display. This anti legionella function does not offer any secure protection against legionella, because the controller requires an adequate added amount of energy and the temperatures cannot be monitored in the entire storage area and the con- nected pipe system.

  • Page 25: Df-Source

    Switch off - difference: If this temperature difference is reached, the relay will switch off. DF-Source Heat source sensor/heat supplier for differential function Adjusts the sensor from the heat source. Diff. Tmin Minimum temperature on the source sensor for approval of the difference relay. If the temperature on the source sensor is below this value, the difference function will not be switched on.

  • Page 26: Pressure Monitor

    The additional function error message activates the relay for certain events and only deactivates again when the information mes- sage to each event was read. Pressure monitor In this menu, the system pressure monitoring can be activated through a direct sensor. As soon as the set pressure conditions are undershot or exceeded, the set relay will switch on.

  • Page 27: Room Sensor

    Room sensor Select the reference sensor for the room temperature. Room Reference (Night) Set room temperature for the night-time mode If the temperature is exceeded at the room sensor outside the set times, the relay will turn off. Room Reference (Day) Set room temperature for the daytime mode If the temperature is exceeded at the room sensor at the set times, the relay will turn off.

  • Page 28: Sensor Calibration

    Sensor Calibration Deviations in the temperature values displayed, for example. due to cables which are too long or sensors which are not posi- tioned optimally can be compensated for manually here. The settings can be made for each individual sensor in steps of 0.5 °C. Settings are only necessary in special cases at the time of initial commissioning by the specialist.

  • Page 29: Radiation Intensity

    You can find the address of the connector or respectively the data logger on the address sticker on the outside of the casing. Pointers and help on how to establish a connection you can find in the enclosed SOREL connect instructions or the instructions of the data logger.

  • Page 30: Menu Lock

    7. Menu Lock Secure the controller against unintentional changing and compromise of basic functions. The menus listed below remain completely accessible despite the menu lock being activated, and can be used to make adjustments if necessary: 1. Measurement values 2. Statistics 3.

  • Page 31: Malfunctions/Maintenance

    Malfunctions/Maintenance Replacing the Fuse Repairs and maintenance may only be performed by a specialist. Before working on the unit, switch off the power sup- ply and secure it against being switched on again! Check that there is no power flowing! Only use the supplied spare fuse or a fuse of the same design with the following specifications: 2 AT/250 VSOREL Art.

  • Page 32: Additional Information

    Additional Information External relay at signal output V(X) (0-10V / PWM) In order to use a 0-10V / PWM output as a 230V / AC switching output, an external switching relay (Art. No. 77502) can be con- nect at the output V (X) (V1, V2, ...). The external relay is then activated via the signal output (0V = "off", 10V = "on").

  • Page 33: Appendix

    Appendix Pump In this menu, the preset profiles for the pump can be selected or under “manual” all settings can be done personally. The settings can still be changed after a profile has been selected. Profile Delete this text and replace it with your own. Output Signal In this menu, the type of pump is set: heating pumps have the greatest output with a small input signal, solar pumps in contrast have very little output with a small input signal.

  • Page 34: Technical Data Pwm And 0-10V

    Technical data PWM and 0-10V Show signal Represents the set pump signal in a graphic and text overview.

  • Page 35: Tips

    Tips The service values include not only current measurement values and operating states, but also all of the settings for the controller. Write the service values down just once after commissioning has been successfully completed. In the event of uncertainty as to the control response or malfunctions the service values are a proven and successful method for remote diagnosis.
  • Page 36 Subject as a basic principle to errors and technical changes. Date and time of installation: Name of installation company: Space for notes: Your specialist dealer: Manufacturer: SOREL GmbH Mikroelektronik Reme-Str. 12 D - 58300 Wetter (Ruhr) +49 (0)2335 682 77 0 +49 (0)2335 682 77 10 info@sorel.de www.sorel.de...

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