Dimplex SOLCU Installation And Operating Instructions Manual
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Dimplex SOLCU Installation And Operating Instructions Manual

Temperature difference controller 5 inputs, 2 outputs
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SOLARTHERMIE - SOLAR THERMAL - SOLAR TÉRMICO - SOLAIRE THERMIQUE - SOLARE TERMICO
Installation and operating instructions
Temperature difference controller
5 inputs,  outputs
These operating instructions are part of the product.
Read these operating instructions carefully before use,
keep them over the entire lifetime of the product,
and pass them on to any future owner or user of this product.
EN
730.138 | Z01 |
Subject to change due to technical improvements!
Solar Controller SOLCU
| ST004_A - 09/08

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  • Page 1 SOLARTHERMIE - SOLAR THERMAL - SOLAR TÉRMICO - SOLAIRE THERMIQUE - SOLARE TERMICO Solar Controller SOLCU Installation and operating instructions Temperature difference controller 5 inputs,  outputs These operating instructions are part of the product. Read these operating instructions carefully before use, ...

  • Page 2: Table Of Contents

    Contents Safety ..................4 Proper usage ................4 Dangers during assembly/commissioning ........ 4 Detecting faults ............... 5 Hot water temperature ............5 Disposal ................... 5 Exclusion of liability ..............5 Case overview ..............6 About this manual ...............7 Applicability ................7 Users ..................7 Description of symbols ............7 Installation ................8 Opening/closing the housing ...........
  • Page 3 Service ................58 10 Fault finding ...............58 10.1 Causes of problems ............... 59 10. Pt1000 temperature sensor values......... 60 11 Information windows ............61 12 Plausibility indices ..............64 13 Technical data ..............66 13.1 Performance data ..............66 13. Parameter settings ..............67 13.3 Parameter values for functions ..........70 14 Notes ..................75 Product information EC declaration of conformity...

  • Page 4: Safety

    Safety Proper usage The temperature difference controller (hereinafter referred to as controller) is an independently installed electronic temperature controller for on-surface installation, and may only be used for controlling solar thermal systems within the permissible ambient conditions (see chapter 14 "Technical data"). The controller must not be operated in the following environments: •...

  • Page 5: Detecting Faults

    Detecting faults Check the display regularly.  In case of faults, isolate the cause (see chapter 10.1 "Causes of problems").  As soon as it becomes evident that safe operation is no longer guaranteed (e.g. visible damage),  remove the device from the mains supply immediately. Have trained professional personnel remedy the fault.

  • Page 6: Case Overview

    Case overview Display Display for controller operation and system settings Operating switch The following modes of Operating buttons operation can be selected: Arrow up - Manual for scrolling up through the menus for commissioning and testing for function SET button Confirmation or Activation of a value - Automatic for automatic operation ESC button...

  • Page 7: About This Manual

    About this manual Applicability This manual describes the installation, commissioning, operation, maintenance and dismantling of the temperature difference controller for solar thermal energy systems. When installing the remaining compo- nents, e.g. solar collectors, pump assemblies, storage units, pumps and switching valves, be sure to observe the appropriate installation instructions provided by each manufacturer.

  • Page 8: Installation

    3.3.4 Other symbols and markings Symbol Meaning Precondition for action ✓ Call to action  Result of action  • List Emphasis on Emphasis on issue at hand issue at hand Press "Arrow up/down" for scrolling : Press "Arrow down" for scrolling through the menu : or to adjust a value Press "Arrow up"...

  • Page 9: Assembly

    Assembly WARNING Risk of electrical shock and fire if mounted in a damp environ- ment! Only mount the controller in an area where the ingress protection is  sufficient (see chapter 14 "Technical data"). 4.2.1 Mounting the controller CAUTION Risk of injury and damage to the casing when drilling! Do not use the casing as a drilling template.

  • Page 10: Electrical Connection

    Electrical connection DANGER Risk of death by electrocution! Remove the controller from the power supply before opening the  case. Observe all applicable legal guidelines and regulations of the local  electricity supplier. NOTE The device is to be connected to the mains by means of a plug with grounding contact, or in the case of a fixed electrical installation, via a disconnection device for complete disconnection in accordance with the installation guidelines.

  • Page 11: Dismantling

    4.3.2 Connecting the cables If a protective conductor is provided or required for pumps/valves,  connect it to the corresponding terminals of the controller. When connecting the protective conductor, observe the following points: Make sure that the protective conductor is also connected to the controller's mains supply side.

  • Page 12: Terminal Plan

    Terminal plan 4.5.1 Power connection • Please refer to the type plate on the case to determine the type of power supply required. • The protective conductor must be connected. • Cables conforming to at least type H05 VV-..(NYM…) must be used.
  • Page 13 Inputs 1 - 4: temperature recording Inputs 1...4 ϑ T1...T5 Temperature sensor Pt 1000 (polarity irrelevant) Input 5: recording temperatures and pulse values Temperature recording ϑ Pt1000 temperature sensor (polarity irrelevant) Recording pulse Recording pulse values via reed relay values via open collector Standard: Special case: volume flow recording...
  • Page 14 4.5.3 Connection of outputs R1 and R2 Output R1: • Semiconductor relays (TRIAC), also suitable for RPM control; max. switching current: see type plate CAUTION Avoiding damage and malfunctions When connecting an external relay or contactor, or when connect-  ing a pump which has its own electronic RPM control, the controller output's RPM control must be deactivated (see chapter 7.4.3 "Setting the RPM control parameter").
  • Page 15 • Potential-free output via electromechanical relay; wire bridge must be removed! DANGER Risk of death by electrocution! In the event of use as a potential-free output, it must be ensured that  the connections cannot come into contact with the mains voltage. R1: output 1 R: output  R1 n.c n.c N n.c n.c.

  • Page 16: Commissioning

    Commissioning Make sure that the installation is finished completely and correctly,  and that the switch on the controller is set to "OFF". The display for setting the language appears.  Setting the language   "Deutsch" flashes in the display. ✓...

  • Page 17: Modes Of Operation

    Modes of operation "OFF" mode   In order to switch off the outputs, slide the operating switch down.  A new window appears in the display, which shows "OFF", as  well as the controller software version number and the number of the chosen system.

  • Page 18: Settings

    Settings 2 sec Menu overview Status display Time Systems 2 storage tanks 1 storage tank Swimming pool Storage tank swim- systems systems systems ming pool systems System 1 System 6 System 8 System 13 System 2 System 7 System 9 System 14 System 3 System 10...
  • Page 19 Factory Parameters Storage priority Language Functions settings Max. temperature Circulation storage tank 1 Max. temperature Back-up heating storage tank 2 Max. temperature Solid fuel boiler swimming pool Quick charge Switch-on temp. difference solar 1 Heat quantity Switch-off temp. difference solar 1 Thermostat Difference Switch-on temp.

  • Page 20: Time

    Time   The time can be displayed and adjusted via the "Time" menu item. Setting the time SET: press button for approx.  sec.  The "Time" menu item is displayed.  Display: 1 Display: 1 SET: press button. ...

  • Page 21: Systems

    Systems The desired solar energy system can be chosen using the "System" submenu. There are a total of 14 dif- ferent systems to choose from (subdivided into 4 system groups). System group 14 systems Chapter Systems with one System 1: 1 collector array – 1 storage tank 7..1 storage tank System : 1 collector array - 1 storage tank - heating return...
  • Page 22 Selecting a system   SET: press button for approx.  sec.  : select the menu item "Systems".  SET: open the submenu "System groups".  Display:  Display:  : Select a system group.  [Systems] [Systems] SET: press button to confirm. ...

  • Page 23: Terminal Layout

      7.2.1 Systems with one storage tank System 1: 1 collector array – 1 storage tank Description of the solar function: The solar circuit pump R1 is switched on as soon as the switch-on temperature difference between the collec- Display: .1 Display: .1 tor array A1 (T1) and the storage tank B1 (T) is reached.
  • Page 24 System 2: 1 collector array – 1 storage tank –   heating return increase Description of the solar function: The solar circuit pump R1 is switched on as soon as the switch-on temperature difference between the collec- Display: .1. Display: .1. tor array A1 (T1) and the storage tank B1 (T) is reached. When the switch-off temperature difference between collector array A1 (T1) and storage tank B1 (T) or a safety limit is reached, the solar circuit pump R1 is switched off again.
  • Page 25   System 3: 1 collector array – 1 storage tank with external heat exchanger Description of the solar function: The solar circuit pump R is switched on as soon as the switch-on temperature difference between the collec- Display: .1.3 Display: .1.3 tor array A1 (T1) and the storage tank B1 (T) is reached. When the switch-off temperature difference or a safety limit is reached, the solar circuit pump R switches off again.
  • Page 26 System 4: 1 collector array –   1 storage tank with zone loading Description of the solar function: The solar circuit pump R1 is switched on as soon as the switch-on temperature difference between the collec- Display: .1.4 Display: .1.4 tor array A1 (T1) and the storage tank B1 (T) is reached. When the switch-off temperature difference between collector array A1 (T1) and storage tank B1 (T) or a safety limit is reached, the solar circuit pump R1 is switched off again.
  • Page 27   System 5: 2 collector arrays (east/west roof) – 1 storage tank Description of the solar function: When the switch-on temperature difference between the storage tank B1 (T3) and one or the other of the Display: .1.5 Display: .1.5 collector arrays A1, A (T1, T) is reached, then either solar circuit pump R1 for collector array A1 (T1), or solar circuit pump R for collector array A (T) is switched on, depending on where the temperature difference...
  • Page 28 7.2.2 Systems with two storage tanks   System 6: 1 collector array – 2 storage tanks – intelligent pump control Description of the solar function: When the switch-on temperature Display: . Display: . difference between the collector array A1 (T1) and one of the two stor- [Storage tank] [Storage tank] age tanks B1, B (T, T3) is reached, the appropriate solar circuit pump...
  • Page 29   System 7: 1 collector array – 2 storage tanks – intelligent valve control Description of the solar function: When the switch-on temperature difference between the collector array A1 (T1) and one of the two Display: .. Display: .. storage tanks B1, B (T, T3) is exceeded, the solar circuit pump R1 is switched on and the switching valve R is set to the correct position depending on the storage tank to be loaded.
  • Page 30 7.2.3 Systems with a swimming pool   System 8: 1 collector array – 1 swimming pool Description of the solar function: The solar circuit pump R is switched on as soon as the switch-on temperature difference between the collec- Display: .3 Display: .3 tor array A1 (T1) and the swimming pool C1 (T) is reached.
  • Page 31   System 9: 1 collector array – 1 swimming pool with external heat exchanger Description of the solar function: The solar circuit pump R1 is switched on as soon as the switch-on temperature difference between the col- Display: .3. Display: .3. lector array A1 (T1) and the swimming pool C1 (T) is reached. When the switch-off temperature difference or a safety limit is reached, the solar circuit pump R1 switches off again.
  • Page 32 System 10: 1 collector array –   1 swimming pool in stand-alone operation with external heat exchanger Description of the solar function: The solar circuit pump R1 is switched Display: .3.3 Display: .3.3 on as soon as the switch-on temperature difference between the collec- tor array A1 (T1) and the swimming pool C1 (T) is reached.

  • Page 33: Swimming Pool

      System 11: 2 collector arrays (east/west roof) – 1 swimming pool Description of the solar function: When the switch-on temperature difference between the swimming pool C1 (T3) and one or the other of Display: .3.4 Display: .3.4 the collector arrays A1, A (T1, T) is reached, then either solar circuit pump R1 for collector array A1 (T1), or solar circuit pump R for collector array A (T) is switched on, depending on where the temperature dif- ference occurs.
  • Page 34 System 12: 2 collector arrays (east/west roof) –   1 swimming pool in stand-alone operation with external heat exchanger Description of the solar function: When the switch-on temperature Display: .3.5 Display: .3.5 difference between the swimming pool C1 (T3) and one or the other of the collector arrays A1, A (T1, T) is reached, then either solar circuit pump R1 for collector array A1 (T1), or solar circuit pump R for collector array A (T) is switched on, depending on where the temperature dif-...
  • Page 35   7.2.4 Systems with one storage tank and a swim- ming pool System 13: 1 collector array – 1 storage tank – 1 swimming pool in stand-alone operation Display: .4 Display: .4 with external heat exchanger – [Storage tank + swimming [Storage tank + swimming pool] pool]...
  • Page 36 System 14: 1 collector array – 1 storage tank –   1 swimming pool in stand-alone operation with external heat exchanger – intelligent valve control Display: ..3 Display: ..3 Description of the solar function: When the switch-on temperature difference between the collector array A1 (T1) and the storage tank B1 (T) or the swimming pool C1 (T3) is reached, the solar circuit pump R1 is switched on and the switching valve R is set to the correct position depending on the storage tank / swimming pool to be loaded.

  • Page 37: Functions

    Functions   Funktionen Funktionen Funktionen [....] Funktionen Funktionen Funktionen [....] Additional controller settings can be made by using the "Functions" sub- menu. The following submenus can be opened using the "Functions" menu item: Display: 3 Display: 3 • Circulation 7.3. [Function] [Function] •...
  • Page 38 NOTE R? or T? indicates an output or input which has not yet been selected. Only outputs which are not yet required by the respective system can be selected. Double allocation of outputs is not possible. However, double allocation of inputs is possible. This is also displayed in an information window (see chapter 11).
  • Page 39 Activating temperature control "Functions" submenu selected, see "Selecting a function" ✓ (see chapter 7.3.1). Circulation activated, see "Activating a function" (see chapter 7.3.1) ✓ Outputs selected, see "Selecting an output" (chapter 7.3.1). ✓ : press button.  The "Temp. controlled" display appears. ...
  • Page 40 7.3.3 Back-up heating function   [....] [....] This function allows thermostatic control of an output for additional heating of the solar storage tank using an oil or gas burner. This function can also be limited to specific times by using additional time control. Display: 3. Display: 3. Time control: time switch with 3 time windows.
  • Page 41   7.3.4 Solid fuel boiler function [....] [....] This function allows control of a pump for heating of a storage tank using a solid fuel boiler. When the temperature difference between the solid fuel boiler and the Display: 3.3 Display: 3.3 storage tank exceeds the "on"...
  • Page 42 Programming the temperature limits of the solid fuel boiler and the storage tank : press button.  The display for setting the temperature limits for storage tank  and solid fuel boiler appears. SET: press button.    "max" flashes in the display (storage tank's maximum tempera- ...
  • Page 43   7.3.6 Heat quantity function [....] [....] The controller has a function for measuring the quantity of heat. This allows, for instance, to record the quantity of heat fed into the storage tank from the solar energy system. To do this, the tempera- Display: 3.5 Display: 3.5 ture of the supply and return, and the flow rate of the solar energy...
  • Page 44 Determining the flow rate for the connected solar circuit pumps NOTE The following settings are only possible with the flow rate determina- tion method "Without flow sensor". Flow rate determination method set to "Without flow sensor". ✓ : press button. ...
  • Page 45 Thermostat activated, see "Activating a function" (chapter 7.3.1). ✓ Outputs selected, see "Selecting an output" (chapter 7.3.1). ✓ : press button.    The display for setting the temperature input and the "on" and  "off" values appears. [...]: 20°C [...]: 20°C SET: press button.
  • Page 46 7.3.8 Difference thermostat function   [......] [......] This function allows a controller output to be controlled depending on a pre-defined temperature difference. When the temperature difference exceeds the defined "on" value, the Display: 3.7 Display: 3.7 output is switched on until the temperature difference falls below the [Difference thermostat] [Difference thermostat] "off"...
  • Page 47 Defining limits for the heat target : press button.    The display for setting the limit of the heat target appears.  SET: press button.  "max" flashes in the display (heat target's maximum value).  : set the maximum value. ...
  • Page 48 7.3.10 Interval function   [...] [...] With some types of collector, the collector's construction does not allow the temperature to be recorded at the appropriate location. In these cases, the solar circuit must be briefly activated at regular intervals to transmit the actual heat from the collector pipe to the collector sen- Display: 3.9 Display: 3.9...
  • Page 49   7.3.11 Stagnating reduction function [........] [........] This function delays the end of the storage tank's loading phase in order to reduce, or even to avoid, the system's stagnation times at high temper- atures. This causes the pump to be stopped repeatedly, and only briefly Display: 3.10 Display: 3.10 switched on again when high collector temperatures arise.
  • Page 50 7.3.13 Frost protection function   [....] [....] When the frost protection function is activated, the solar circuit pump is switched on as soon as the collector temperature sinks below +5 °C. This causes heat to be pumped through the collector from the lower Display: 3.1 Display: 3.1 part of the storage tank in an attempt to prevent the collector from...
  • Page 51   7.3.15 Alarm output function [......] [......] The alarm output is always switched on when the controller detects a pre-selected type of error (sensor error, int. clock error, system error, night circulation, piping error). For connection of the alarm output, see Display: 3.14 Display: 3.14 chapter 4.5.4.

  • Page 52: Parameters

    Parameters   [....] [....] In the factory, the controller is configured in such a manner that it can be used in most applications without changes to these values. All parameters can be modified to a certain extent to suit the individual Display: 4 Display: 4 requirements of the system.
  • Page 53   7.4.2 Setting the loading strategy parameter [..[........Access the "loading strategy" parameter, (see chapter 7.4.1). ✓ ....] ....] SET: press button.  The display for setting the temperature differential control or  Display: 4.1 Display: 4.1 target temperature control appears.

  • Page 54: Storage Priority

    Storage priority   When a -storage-tank system is selected, the storage priority can also be specified. When storage priority is activated, a first-priority storage tank and a Display: 5 Display: 5 second-priority storage tank can be defined. If it is intended that one of [Storage priority] [Storage priority] the two storage tanks is not to be loaded, this tank can be "removed"...

  • Page 55: Language

    Language   [....] [....] Accessing and selecting the language SET: press button for approx.  sec.  Display: 6 Display: 6 : select menu item "Language".  [Language] [Language] SET: press button.    The language display appears. ...

  • Page 56: Automatic Operation

    Automatic operation Symbols In "Automatic" operation of the controller, the status display with the selected solar energy system and other set functions are shown on the display. You can access the values of the individual sensors, the outputs' running times, and additionally set functions, by using the operating buttons (arrow up and arrow down).

  • Page 57: Status Display

    Status display   Switching the display screen : press button.  The following values and displays appear one after another:  • The temperature sensors of the system set, and the corresponding Sample display Sample display current temperature values. •...

  • Page 58: Service

    Service Updating the controller software The controller is programmed in the factory with the latest controller software at the time of production. Therefore, the software does not usually have to be updated. However, if you would like to use newer controller software or if an update is recommended for technical reasons, you can transfer new controller software to the controller via the RS3 interface.

  • Page 59: Causes Of Problems

    10.1 Causes of problems Controller does not appear to function at all: Secondary symptoms Possible cause Procedure • Display shows nothing Controller power supply is • Check the controller power cable interrupted • No display illumination • Check the fuse for the power supply •...

  • Page 60: Pt1000 Temperature Sensor Values

    The solar pump operates, despite the fact that the switch-on condition is not fulfilled: Secondary symptoms Possible cause Procedure The pump symbol in • The interval function is acti- • No fault the display rotates vated • Deactivate the relevant function, if •...

  • Page 61: Information Windows

    Information windows The following information windows are displayed whenever a function's settings are not complete, activa- tion of a function is not possible, errors occur in the system, or certain functions are currently activated. Display Description Measures Function cannot be activated as the cor- Check and complete the settings.
  • Page 62 The solar circuit has stopped because the controller is conducting a priority – test. This test checks whether, instead of the second-priority storage tank, the first-priority storage tank could also be loaded. This test can take several minutes, as the collector array must heat up sufficiently.
  • Page 63 Sensor cable has short-circuited or the Check connection and/or sensor ca- sensor is possibly defective. ble. Possibly check sensor and sensor cable using an ohmmeter. Loading of the storage tank/pool was If this is not wanted, loading can be deactivated due to storage priority. reactivated via storage priority or season selection.

  • Page 64: Plausibility Indices

    Plausibility indices The internal plausibility check ascertains whether conflicting settings have been detected in the controller. In this event, an information window displays an error code. The reasons which cause the information window to appear, along with each corresponding error code, are described in the following table. Check your settings at the controller, and correct them if necessary.
  • Page 65 P 8 Switch-on temperature difference external heat exchanger + maximum temperature storage tank 1 > maximum temperature loading circuit 1 P 9 Switch-on temperature difference external heat exchanger + maximum temperature storage tank  > maximum temperature loading circuit 1 P 31 Temperature differential control storage tank 1 <...

  • Page 66: Technical Data

    Technical data Temperature difference controller Rated voltage 30 VAC, 50 Hz (system voltage) [optional 115 VAC, 60 Hz] Max. own consumption ≤ 4 W Inputs T1 - T4: temperature recording (Pt1000) T5: temperature recording (Pt1000) or pulse recording Additional inputs 1 x Direct Sensor input (flow rate and temperature) Outputs R1: TRIAC output for RPM control, max.

  • Page 67: Parameter Settings

    13.2 Parameter settings Maximum temperature storage tank 1 and storage tank 2: Factory Adjustable Adjustable Description setting down to up to max. min. 60 °C 0 °C 95 °C When the maximum temperature of storage tank 1 (storage tank ) is reached, storage tank 1 (storage tank ) is not loaded until the temperature drops to 3 K below the defined maximum value.
  • Page 68 Switch-off temperature difference external heat exchanger: Factory Adjustable Adjustable Description setting down to up to max. min. When the switch-off temperature difference between the secondary side of the external heat exchanger and the storage tank is reached, loading of the stor- age tank is stopped. This value cannot be changed. Maximum collector temperature: Factory Adjustable...
  • Page 69 Maximum temperature loading circuit: Factory Adjustable Adjustable Description setting down to up to max. min. 100 °C Minimum 130 °C When the temperature on the secondary side in loading cir- the heat exchanger reaches 3 K below the defined cuit tempera- maximum value, the solar circuit pump is switched ture +0 K off and the storage tank loading pump continues to run.

  • Page 70: Parameter Values For Functions

    13.3 Parameter values for functions Circulation: Factory Adjustable Adjustable Comment setting down to up to max. min. Time controlled: 00.00 3.59 Programming a time period which goes beyond midnight (4.00) is not possible. Temperature controlled: Switch-on temperature: 30 °C 0 °C Switch-off temperature - K Switch-off temperature: 35 °C Switch-on...
  • Page 71 Solid fuel boiler: Factory Adjustable Adjustable Comment setting down to up to max. min. Temperature controlled: Switch-on temperature difference: Switch-off 0 K temperature difference + K Switch-off temperature difference: Switch-on temperature difference - K Maximum heat target temperature: 60 °C 0 °C 150 °C Minimum heat source temperature: 50 °C 30 °C...
  • Page 72 Heat quantity: Factory Adjustable Adjustable Comment setting down to up to max. min. Pulse value for recording flow rate with a pulse generator: 1 l/Imp 5 l/Imp, 10 l/Imp, 1 l/Imp, 10 Imp/l, 0 Imp/l, 50 Imp/l, 100 Imp/l, 00 Imp/l, 300 Imp/ l, 400 Imp/l, 500 Imp/l, 600 Imp/l, 700 Imp/l, 800 Imp/l, 900 Imp/l, 1000 Imp/l Recording flow rate with Grundfos sensor type (Direct Sensor): VFS 1 - 0, VFS  - 40, VFS 5 - 100, VFS 10 - 00...
  • Page 73 Differential thermostat: Factory Adjustable Adjustable Comment setting down to min. up to max. Temperature controlled: Switch-on temperature difference: Switch-off 80 K temperature difference + K Switch-off temperature difference: Switch-on temperature dif- ference - K Maximum heat source temperature: 100 °C Minimum 180 °C source tem- perature + K Minimum heat source temperature: 0 °C...
  • Page 74 Interval: Factory Adjustable Adjustable Comment setting down to min. up to max. Interval time: 15 min 10 min 60 min Test-on time: 5 sec. 3 sec. 30 sec. Time controlled: 00.00 3.59 Programming a time period which goes beyond midnight (4.00) is not possible. Holiday function / recooling: Factory Adjustable...

  • Page 75: Notes

    Notes 730.138 | 08.1...
  • Page 76 730138...

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