KT-Elektronik SOL3-7 Installation And Operating Manual

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Solar controller

SOL3-7

Installation and operating manual

Firmware version 1.07 June 2011

Installation and operating manual KT-Elektronik

Warranty

We permanently enhance our products, therefore we reserve the right to make changes to our products at any time and without prior notice.

We take no responsibility for the accuracy or completeness of this manual. No liability can be accepted for the use of our products for a buyer specific purpose. Buyer claims, especially claims for damages including lost profits or other financial losses are excluded. This does not apply if the damage caused by intent or gross negligence. In case of negligent violations of major contractual obligations, our liability is limited to the foreseeable damage

Security advices

Only qualified personnel that is familiar with installation and commissioning of this product is allowed to mount and put into operation the device. Appropriate shipping and storage are assumed.

The product is designated for use in heavy current equipment. Installation and maintenance have to be performed according to the corresponding safety regulations.

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Table of contents

1 Operation .......................................................................................................................... 6

1.1 Controls ...................................................................................................................... 6

1.1.1 Rotary switch ....................................................................................................... 7

1.1.2 Rotary pushbutton .............................................................................................. 7

1.2 Operating .................................................................................................................. 8

1.3 Display ...................................................................................................................... 8

1.3.1 System scheme ................................................................................................... 9

1.3.2 Operating Mode ................................................................................................ 10

1.4 Retrieving data – Information level .......................................................................... 11

1.5 Setting the system time ............................................................................................ 12

1.6 Adjust usage schedule settings ............................................................................... 13

1.7 Setting the party mode (heating circuit/auxiliary heating) ........................................ 15

1.8 Setting holidays ........................................................................................................ 16

1.9 Setting vacation times .............................................................................................. 17

1.10 Access advanced information level ........................................................................ 18

1.11 Trend show – Data logging .................................................................................... 20

2 Commissioning ............................................................................................................... 22

2.1 Set language ........................................................................................................... 22

2.2 Setting the system variant ID ................................................................................... 23

2.3 Activate and deactivate functions ............................................................................ 24

2.4 Edit settings ............................................................................................................. 26

2.5 Sensor calibration .................................................................................................... 28

2.6 Reset to factory default settings ............................................................................... 29

3 Manual operating mode .................................................................................................. 30

4 System variants .............................................................................................................. 31

4.1 Extending the basic system variant representations ................................................ 40

5 Solar circuit functions ..................................................................................................... 43

5.1 Basic Control function .............................................................................................. 43

5.2 Storage .................................................................................................................... 45

5.3 Swimming pool ......................................................................................................... 46

5.4 Collector return flow sensor, Collector flow sensor .................................................. 47

5.5 Measurement of solar power and solar energy ........................................................ 48

5.6 Rotation speed control ............................................................................................. 49

5.7 Collector overheating protection .............................................................................. 50

5.8 Collector minimum temperature ............................................................................... 51

5.9 Start up function ....................................................................................................... 51

5.10 Forced pump operation (blocking protection) ........................................................ 51

5.11 Collector Antifreeze ................................................................................................ 52

5.12 Two collector arrays ............................................................................................... 52

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5.13 External heat exchanger ........................................................................................ 53

5.14 Auxiliary heating with secondary heat generator ................................................... 53

6 Heating circuit functions ................................................................................................. 55

6.1 Prescribing the room temperature set-points ........................................................... 55

6.2 Weather-compensated control ................................................................................. 55

6.2.1 Gradient characteristic ..................................................................................... 55

6.2.2 4-point characteristic ......................................................................................... 57

6.3 3-point control .......................................................................................................... 59

6.4 Two-point control ..................................................................................................... 59

6.5 Underfloor heating/screed drying ............................................................................. 60

6.6 Deactivation depending on the outdoor temperature ............................................... 61

6.6.1 OT deactivation temperature for daytime operating mode ................................ 61

6.6.2 OT deactivation temperature for night-time operating mode ............................. 61

6.6.3 OT activation temperature for daytime operating mode .................................... 61

6.6.4 Summer operating mode (OM) .......................................................................... 62

6.7 Delayed outside temperature compensation ........................................................... 62

6.8 Remote operation .................................................................................................... 63

6.9 Optimization ............................................................................................................. 63

6.10 Raise return flow of external heating system ........................................................ 64

6.10.1 Main principle .................................................................................................. 64

6.10.2 Implementation ................................................................................................ 65

7 Domestic water circuit functions ..................................................................................... 66

7.1 Domestic water heating in storage tank ................................................................... 66

7.2 Thermal Disinfection of the storage tank ................................................................. 66

8 System wide functions - all system variants ................................................................... 67

8.1 Automatic summer/winter switching ......................................................................... 67

8.2 Antifreeze ................................................................................................................. 67

8.3 Locking manual operating mode .............................................................................. 68

8.4 Locking the rotary switch ......................................................................................... 68

8.5 Enter a valid individual access code ........................................................................ 68

8.6 Temperature difference controller ............................................................................ 69

9 Malfunction ..................................................................................................................... 70

9.1 Error list .................................................................................................................... 70

9.2 Sensor failure ........................................................................................................... 70

9.3 Temperature monitoring ........................................................................................... 71

9.4 Error status register ................................................................................................. 71

9.5 SMS delivery in case of a system failure ................................................................. 72

10 Communication ............................................................................................................ 73

10.1 Communication module KOM232PC .................................................................... 74

10.2 Communication module iCon485 .......................................................................... 74

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10.3 Communication module KOM232M ...................................................................... 76

10.4 Data Modem DataMod11 ...................................................................................... 77

10.5 ModBus-MBus-Gateway ....................................................................................... 78

10.6 USB communication cable USB-L3 ...................................................................... 79

10.7 Modbus-TCP-Gateway ......................................................................................... 80

10.8 Description of the adjustable communication settings .......................................... 80

10.9 Memory module .................................................................................................... 81

10.10 55Viewer for visualization and remote maintenance. ......................................... 82

10.11 Data Logging ....................................................................................................... 83

11 Mounting ....................................................................................................................... 84

12 Electrical connection ..................................................................................................... 86

12.1 Notes for wire installation ....................................................................................... 86

12.2 Surge Protection Measures ................................................................................... 86

12.3 Connecting the controller ....................................................................................... 86

12.3.1 Connecting the sensors ................................................................................... 87

12.3.2 Connecting the pumps .................................................................................... 87

12.3.3 Legend for connection diagram ....................................................................... 87

12.3.4 Wiring diagram ................................................................................................ 88

12.3.5 Terminal assignment for Outputs .................................................................... 89

12.3.6 Terminal assignment for inputs ....................................................................... 92

13 Appendix ....................................................................................................................... 93

13.1 Function block lists ................................................................................................. 93

13.2 Parameter list ......................................................................................................... 97

13.3 Resistance values ................................................................................................ 100

13.4 Technical specifications ....................................................................................... 101

13.5 Accessories .......................................................................................................... 102

13.6 Function block settings in configuration levels ..................................................... 103

13.7 Einstellungen in den Parameterebenen .............................................................. 104

13.8 Abbreviations ....................................................................................................... 106

13.9 Access codes ....................................................................................................... 107

13.10 Notes .................................................................................................................. 108

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1 Operation

The controller is factory-provided with standard temperature settings and timing programs and therefore ready for use.

The current date and time have to be set at initial operation of the controller (Chapter

1.5).

1.1 Controls

The operational controls are located on the front side of the controller.

The user is guided by means of rotary switches and pressing the control button described below control levels.

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1.1.1 Rotary switch

The rotary switch is used to select the operating mode on the left hand and the basic settings of the controller on the right hand.

Rotary switch – operating mode

Control on, display informations about operating behaviour of unit (standard position)

Turning off the control functions (Controller remains in operation)

Manual operating mode: manual switching of pumps and valves, position presetting in percent

Rotary switch – Settings

Solar-Turn-on threshold Solar-Turn-off threshold Scheduled time ranges and operating modes for

heating circuit (1), aux. heating (2) and hot water circulation (3)

Party mode

System time: Setting time, date and year

Configuration and settings level

1.1.2 Rotary pushbutton

The rotary pushbutton is an integral part of the intuitive operating concept, with only one button.

Turn : Display, select settings and function blocks

Push : confirm selection or setting

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1.2 Operating

The operation of the device SOL3-7follows a continuous uniform display and operating philosophy.

Values and display texts are shown in black characters with no background. Elements for direct input or selection are shown with white characters on black background. Choice elements in rows oriented menus are shown with black characters on a gray background.

With the help of the rotary switch, a control level is set. The rotary pushbutton is used to select and adjust.

1.3 Display

The controller SOL3-7 it equipped with a graphical display. The display allows it to visualize the current system scheme with all relevant sensor informations as welll as state informations of pumps and valves for a quick overview of the operating condition of the system.

Example of display in the information level:

For the use of the device the user is facilitated in operating levels for display and input of operating parameters with clear text menus and explanatory texts.

Example of display in the setting level:

Example of display for checking and modifying of times-of-use (weekly schedule):

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1.3.1 System scheme

With the on the display shown system scheme, the relevant sensor information, the operating mode of the control circuits and state information of pumps and valves for a quick overview of the operating condition can be visualized.

Among the symbols used in the system scheme are the following:

Element Symbol Meaning

Pump

Pump is in operation Pump is not in operation

Switching valve

Switching valve is showen with filled triangles

Valve

Valve is not in operation Valve 'CLOSE' is in operation Valve 'OPEN' is in operation

Auxilary heating

Auxilary heating is not in operation Auxilary heating is in operation

Collector pump

A temporarily shown sun above a collector represents an operating state indication of the pump belonging to the collector.

Condition for the activation of the pump is not met and the pump is not operating.

Condition for the activation of the pump is met and the pump is operating.

The condition for switching off the pump is met, but pump is due to the minimum ON time still in operation.

Condition for switching on the pump is met, but pump is due to the minimum OFF time yet in operation.

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Installation and operating manual KT-Elektronik

1.3.2 Operating Mode

The operation of the heating circuit, hot water circulation and auxilary heating can be affected depending on time and day of week. There are two different set-points for night and day exist. A usage schedule determines when to operate in day-time operating mode or night-time operating mode. It is possible to deactivate schedules (without deleting them) and to specify manually to operate permanently in day-time or night-time operating mode.

Icons on the display indicate the current operating mode for each function of the controller:

Daytime operating mode (nominal operation)

Values are permanently adjusted to meet the set-points entered for nominal operating mode regardless of scheduled time ranges or summer operating mode settings.

Night-time operating mode (reduced operation)

Values are permanently adjusted to meet the set-points entered for reduced operation regardless of scheduled time ranges.

Normal operating mode off

Normal operating mode is deactivated regardless of the scheduled time ranges. Only equipment anti-freeze is ensured (if activated).

Automatic operating mode

The controller automatically switches between both modes depending on the time.

Manual operating mode

Manual control of valves and pumps (Chapter 3).

The operating modes of heating circuit, hot water circulation and auxilary heating are in the system scheme, context-sensitive arranged and allow capture at a glance the current function of the system part.

Operating mode Symbol Symbol Time phase

Standby Nominal operation

(Day mode)

Automatic mode Reduced operation

(Night mode)

Manual mode

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1.4 Retrieving data – Information level

At the normal rotary switch position ,„Information level“, the system scheme, time, date as well as relevant temperatures measured by the connected sensors and state informations of pumps and valves of the selected hydraulc schema.

By turning and pushing the rotary pushbutton it is possible to show time, date, temperature, and query the values of connected sensors and their setpoints.

Procedure:

Select value: In the display appears, depending on system configuration, successively the different data points, which are described by an acronym:

Sample displays Meaning

So: 14:57 Time

AF: -5.3°C Outdoor temperature AF

RF: 20.4°C Room temperature RF

VF: 34.1°C

Temperature at flow sensor of heating circuit VF

SF1: 52.9°C Temperature at storage tank sensorr SF1

CF1: 27.3°C Temperature at collector sensor CF1

coll 12 h Operating hours of solar circiut

trend show Graphical presentation of logged system data

Setpoint or limit value compared to the displayed value.

Pushing the rotary pushbutton in the clock display shows the date and year.

Additional values can be displayed in the optional, advanced level of information (Kapitel

1.10).

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Display area

Installation and operating manual KT-Elektronik

1.5 Setting the system time

The current time and date must be set immediately after the commision and after a power failure of more than 24 hours. In this case, the system time on the clock 01/01/2000 10:00 preset and is displayed inverted (white on black) .

Procedure:

Set rotary switch to time

Display: System scheme and time(inverted)

Edit time

Confirm time

Display: System scheme and year (inverted)

Edit year

Confirm year Jahreszahl übernehmen.

Display: System scheme and year (inverted) Format: day.month

Edite date

Confirm date

Display: System scheme and time (inverted)

Set rotary switch to Information level

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1.6 Adjust usage schedule settings

There are three separate usage schedules for

• Heating circuit

• Auxiliary heating

• Domestic water circulation

For systems that do not contain the functional groups mentioned, this chapter has no meaning, the display and input of times-of-use is not offered by the SOL3-7.

The following applies to each usage schedule: For each day of the week, three time ranges can be programmed. If only one time range is

needed, the start and end time of the second range have to be set to the same value. The third range will then not be shown any more.

A usage schedule is presented as a weekly schedule. For each day there is shown every interval (time-to-use) for nominal operation (day) by a gray bar chart. A black bar indicates a time in addition to the party program set-operation (chapter 1.7).

To check the set times of use should the group of days (Monday to Sunday, Monday to Friday, Saturday and Sunday) are not used. If this menu, even after adjustment of schedule settings opened, the times-of-use of Monday will transfered to all other days of week.

Factory defaults

Times Mo Tue Wed Thu Fr Sa Su

Heating circuit 06:00 – 22:00 Auxiliary heating - - : - - – - - : - Domestic water circulation 00:00 – 24:00

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Procedure:

Set rotary switch to times-of-use

Times-of-use for heating circiut is graphicaly shown, name of times-of-use is displayed inverted.

Select times-of-use to view

• heating circuit

• hot water circulation

• auxilary heating

Confirm times-of-use to modify

Display: Selection 'Monday to Sunday' (inverted)

Select day of week (inverted):

• Monday to Sunday

• Monday to Friday

• Saturday to Sunday

• single day

Confirm day of week (interval)

Display: Start and stop time for day of week

Edit start time (inverted):

• 15 minute increment

• 00:00 to 24:00

• - - : - - deaktivated

Confirm Start or stop time

Anzeige: next start or stop time After confirming the maximum 6 times the selection of the day of week starts again. Repeat these steps for the daily input in the same order.

Set rotary switch to Information level

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1.7 Setting the party mode (heating circuit/auxiliary heating)

Using the Party mode function, the controller continues or activates the nominal operating mode (day) during the time when the party timer is active, regardless of the programmed times-of-use. The activation of the party mode (count down) starts with turning the rotary switch to any operating mode position (e.g.information level). When the party timer has elapsed, the party mode timer is reset to 00:00 and the controller continue working as programmed times-of-use.

Setting FS Value range initiate or continue nominal operation 0 h 0 to 48 h

Procedure:

Set rotary switch to party mode

Display: weekly schedule (name of times-of-use is displayed inverted.)

Select times-of-use

• heating circuit

• auxilary heating

Confirm times-of-use

Display: Current Party timer (inverted)

Edit desired duration of time-of-use The party time is displayed across days.

Confirm Party timer

Display: weekly schedule (name of times-of-use is displayed inverted.)

Set rotary switch to Information level

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Note: The lapse of time of the party timer is displayed in 15 minute increments.

Installation and operating manual KT-Elektronik

1.8 Setting holidays

On public holidays the times-of-use entered for Sunday apply. The number of programmable holidays is limited to 20. Once programmed the holidays are valid every year.

Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select item 'PA5'

Confirm selection

Select item 'PA5.01'

Confirm selection

Display: date of holiday or placeholder

Select date of holiday or placeholder

Confirm date or placeholder to modify

Display: Date of holiday (inverted)

Edit date of holiday (day.month) or erase the date by select placeholder '--.--' (01.01 to 31.12)

Confirm input

Display: Modified date or placeholder (edit further holidays)

Set rotary switch to Information level

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1.9 Setting vacation times

During vacation times the system is set to permanent reduced operation. The number of programmable vacation times is limited to 10.

Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select item 'PA5'

Confirm selection

Select item 'PA5.02'

Confirm selection

Display: vacation time or placeholder

Select vacation time or placeholder

Confirm vacation time or placeholder to modify

Display: Vacation time (inverted)

Edit vacation time by set first and last day of vacation period (day.month) or erase the date by select placeholder '--.--' (01.01 to 31.12)

Confirm input

Display: Modified date or placeholder (edit further vacation time)

Set rotary switch to Information level

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1.10 Access advanced information level

After entering the access code 1999 the following informations are accessible through the menu items as described in chapter 1.4:

•Measured values for not needed sensor inputs of current system layout

•Valve positions

•Binary input switching status

•Modem state

•Data of M-Bus meters

•Info II - The following values are sequentially displayed:

ID Controller ID Logg Memory usage of data logging-module (Kapitel 10.11) MBAd Station address Koll Operating hours of solar circuit V' Volume flow rate of flow sensor in solar circui Pakt Current performance of solar circuit Wtot Total gain (rate) of solar circuit WTag Daily gain of solar circuit

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Provide advanced information level:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select item 'PA1' (respectively 'PA3')

Confirm selection

Set access code (key number) 1999

Confirm access code (key number) 1999

Display: Settings menue ('PA1' selected)

Set rotary switch to Information level

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Note: Re-entering the access code 1999 hides the advanced informations.

Installation and operating manual KT-Elektronik

1.11 Trend show – Data logging

The device SOL3-7 is equipped with an internal memory capacity. Every minute the controller saves data into this memory, in order to analyze in retrospect the operation of the device without use of additional tools.

The internal backup includes:

• Sensor readings

• States of the switching outputs

• Error Status Register and archive

• Access to controller settings

• user-defined data points

The trend display shows a graph of up to 3 selectable data points with exactly 160 values. The display area is determined based on the variable minimum and maximum values in the range of 160 displayed records.

One record will be selected through a focus (vertical line in the display area). The recording time stamp below the center and the values in plain text on the left side of the display area are displayed.

With the control button, the displayed time range can be changed and adjusted to the middle of the display area.

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Usage of the trend show

Set rotary switch to Information level

Display: System scheme

Select 'trend show'

Confirm Selection 'trend show'

Display: Trend show settings

Select item Confirm selection to modify the item

Select 'end' Confirm selection 'end' Display: Trend show

Move focus to show values of records

Set focus to the middle of the display area (readjust time domain)

Moving the focus to the right or left edge

Leave trend show

Display: System scheme

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2 Commissioning

The configuration procedures and parametrization described in this chapter can only be performed by entering a valid controller access code.

The access code provided by the factory for first time use can be found in the appendix. To avoid an unauthorized use, it is recommended to cut out or black out the code. Additionally the standard code can be replaced by an individual one (Chapter 8.5).

2.1 Set language

The device SOL3-7 will delivered with german language as factory default language. It is possible to use other languages.

Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected- Language German as default)

Select 'Anzeigesprache' in Settings menue

Confirm selection

Display: Current languages (inverted)

Select your prefered language

Confirm language

Display:

Settings menue in the chosen language

Set rotary switch to Information level

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2.2 Setting the system variant ID

Several hydraulic system variants are available. Each variant is represented by an identification number. The variants are illustrated in chapter 4. The available controller functions are described in chapters 5, 6 and 7.

Editing the variant ID resets previously entered function blocks to factory default settings. At parameter level, function block parameters and settings will be preserved. The variant ID can be set at configuration level.

Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select 'syst.var.id' in Settings menue (system code number)

Confirm selection

Display: Access code (Key number)

Set valid key number (chapter13.9)

Confirm key number

Display: System scheme

(system code number inverted)

Select system scheme

Confirm system

Display: Settings menue (Item 'syst.var.id' selected)

Set rotary switch to Information level

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2.3 Activate and deactivate functions

Each function can be activated within its related function block. The sequence of numbers shown at the head of the display (0 to 24) represent the function block numbers. When accessing the configuration level, a black square is displayed right hand below active function block numbers. The function blocks are described in chapter 13.1.

The functions are grouped by topic:

CO1: Heating circuit CO3: Solar circuit CO4: Domestic water circuit/auxiliary heating CO5: System wide CO6: Modbus-Communication

Function block parameters

Some functions that can be configured via function blocks require additional parameters. This function block parameter will queried to edit or to confirm in the line of the function block after function block is activated or deactivated.

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Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select 'CO3' in Settings menue

Confirm selection

Display: Access code (Key number)

Set valid key number (chapter13.9)

Confirm key number

Display: Configuration menue 'CO3'

Select funktion to activate or deactivate function (1/0)

Confirm selection

Display: 'F01 Forced pump op. 0'

(Function block value inverted)

Activate or deactivate function (1/0)

Selektion bestätigen

Anzeige: Configuration menue 'CO3'

Set rotary switch to Information level

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2.4 Edit settings

Depending on the current system variant ID and active functions, not all parameters listed in the parameter list in the Appendix will be accessible (Chapter 13.2). The functions are grouped by topic:

PA1: Heating circuit PA3: Solar circuit PA4: Domestic water circuit / auxiliary heating PA5: System wide PA6: Modbus Communication

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Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select 'PA3' in Settings menue

Confirm selection

Display: Access code (Key number)

Set valid key number (chapter13.9)

Confirm key number

Display: Settings menue 'PA3'

Select setting

Confirm setting to modify

Display: Setting menue 'PA3' (Value inverted)

Edit setting

Confirm setting

Display: Setting menue 'PA3 (Line 'PA3.01' selected)

Set rotary switch to Information level

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2.5 Sensor calibration

The controller is designed for connection of Pt1000-sensors. The sensor values of resistance are listed on page 100.

If the temperature values displayed by the controller do not match the real temperatures, the measured values of the connected sensors can be adjusted. The temperature value displayed has to be replaced by the value measured directly at the measuring point (reference value). The adjustment has to be activated in CO5, function block F20. A wrong adjustment can be deleted (for all inputs) by setting - 0 in F20.

Procedure:

Select the function block according to chapter 2.3 CO5.F20 "Sensor calibrat" and activate or confirm the function block set.

As a function block parameter are viewed with turning the rotary pushbutton all in the chosen hydraulic system used temperature sensor inputs. If the rotary pushbutton is pushed, the displayed value is inverted for input.

By turning the rotary pushbutten edit the reference value as an actual temperature of a thermometer directly at the measuring point and confirm by pressing the rotary pushbutton.

Proceed in this manner to be aligned with each temperature sensor input.

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2.6 Reset to factory default settings

All parameters set by means of the rotary switch as well as the parameters set in level PA1 to PA5 can be reset to factory default settings, except the maximum flow temperature and return flow temperature thresholds in level PA1.

Procedure:

Set rotary switch to configuration and settings level

Display: Settings menue (LCD contrast selected)

Select item 'PA1' (respectively 'PA3')

Confirm selection

Set access code (key number) 1991

Confirm access code (key number) 1991

Display: Settings menue ('PA1' selected)

Set rotary switch to Information level

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Note: The error message "Error 2" will be generated while resetting to the factory default settings. It will be removed automatically shortly after midnight.

Installation and operating manual KT-Elektronik

3 Manual operating mode

The manual operating mode allows the configuration of all outputs (chapter 12).

Procedure:

Set rotary switch to manual mode

Display: System scheme and 'Collector 1'

Select switching output or valve

Confirm selected output

Display: System scheme and current state of collector pump 1 (inverted)

Edit state of output

Confirm state of output

Display: System scheme and 'Collector 1'

Set rotary switch to Information level

The manual operating mode of the affected control circuit can be deactivated by selecting any other operating mode.

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Note: Just by moving the rotary switch to the position “manual operating mode”, the outputs of the controller are not affected. Only the specific change of position respectively switching status will influence them.

In manual operating mode the antifreeze function can not be guaranteed (Chapter 8.2).

KT-Elektronik SOL3-7

4 System variants

117 hydraulic system variants are available. They differ in the first instance in:

• Number of collector arrays,

• Number of storages,

• Switching between several collectors or storages by means of switching valves or

several pumps,

• Internal (or none) or external heat exchanger. The following section shows 17 system variants, all other1 differ only by the presence or absence of extensions as:

• Heating circuit

• Auxiliary heating (e.g boiler, electric cartridge heater),

• Domestic water circulation pump

The system images shown are just basic variant representations missing any kind of cut-off and safety devices or check valves for example.

System variant I  I.0.0 One collector, one storage tank

1 Als system variant IDs are listed at page 89 in the list of output terminal configuration.

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System variant 2  I.0.0

Two collectors (switching valve), one storage tank

System variant 3  I.0.0

Two collectors (two pumps), one storage tank

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System variant I o I.0.0

One collector, one storage, external heat exchanger

System variant 2 o I.0.0

Two collectors (switching valve), one storage tank, external heat exchanger

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System variant 3 o I.0.0

Two collectors (two pumps), one storage tank, external heat exchanger

System variant I  2.0.0

One collector, two storage tanks (switching valve)

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System variant 2  2.0.0

Two collectors (switching valve), two storage tanks (switching valve)

System variant 3  2.0.0

Two collectors (two pumps), two storage tanks (switching valve)

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System variant I o 2.0.0

One collector, two storage tanks (switching valve), external heat exchanger

System variant 2 o 2.0.0

Two collectors (switching valve), two storage tanks (switching valve), external heat exchanger

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System variant 3 o 2.0.0

Two collectors (two pumps), two storage tanks (switching valve), external heat exchanger

System variant I  3.0.0

One collector, two storage tanks (two pumps)

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System variant 2  3.0.0

Two collectors (switching valve), two storage tanks (two pumps)

System variant I o 3.0.0

One collector, two storage tanks (two pumps), external heat exchanger

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System variant 2 o 3.0.0

Two collectors (switching valve), two storage tanks (two pumps), external heat exchanger

System variant 3 o 3.0.0

Two collectors (two pumps), two storage tanks (switching valve), external heat exchanger

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4.1 Extending the basic system variant representations

Each system image shown can be enlarged to include other functions. These additional functions can be combined with each other.

The functions heating circuit, auxiliary heating and circulation are identified by the last two digits of the system variant ID:

xxx.0.0 no additional function xxx. I.0 Auxiliary heating xxx.2.0 Circulation pump xxx.3.0 Auxiliary heating and circulation pump xxx.0. I Heating circuit xxx. I. I Auxiliary heating and heating circuit xxx.2. I Circulation pump and heating circuit xxx.3. I Auxiliary heating and circulation pump and heating circuit

Example of all additional functions with system variant I o 2:

System variant I o 2.0. I (with heating circuit)

One collector, two storage tanks (switching valve), external heat exchanger

2 Not available for each system variant

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System variant I o 2. I.0 (with auxiliary heating)

One collector, two storage tanks (switching valve), external heat exchanger

System variant I o 2.2.0 (with circulation pump)

One collector, two storage tanks (switching valve), external heat exchanger

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System variant I o 2. I. I (with heating circuit and auxiliary heating)

One collector, two storage tanks (switching valve), external heat exchanger

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5 Solar circuit functions

5.1 Basic Control function

The controller monitors the collector temperature (sensor CF) as well as the storage temperature (sensor SF) and turns the collector pump (CP) on once enough solar energy is available to heat up the storage.

The temperature chart shows how regulation works under consideration of the parameters:

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Figure 1: temperature chart

Installation and operating manual KT-Elektronik

A) The collector temperature exceeds the storage temperature by more than the

turn-on threshold (8 K). The collector pump is turned on.

B) The collector temperature dropped below the turn-off threshold (SF + 4 K). The

collector pump is turned off.

C) The collector temperature exceeds the turn-on threshold again. The pump is

turned on as soon as the minimum idle time elapses.

D) The collector temperature dropped and falls below the turn-off threshold again

(SF + 4 K). The collector pump is turned off.

E) The collector temperature exceeds the storage temperature by more than the

turn-on gap (8 K). The collector pump is turned on.

F) The collector temperature quickly dropped below the turn-off threshold again. The

pump remains running as long as the minimum running time has not elapsed.

Parameters for the basic function:

Setting FS Value range Description

Direct input

8 K 1 to 50 K Turn-on threshold

Direct input

4 K 1 to 50 K Turn-off threshold

Minimum run time PA3.01

60 s 0 to 1800 s Minimum run time for collector pump

Minimum idle time PA3.02

180 s 0 to 1800 s Minimum idle time for collector pump

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Note: The turn-on condition only applies if the actuator to be turned on is turned off. The turn-off condition only applies if the actuator to be turned off is turned on.

By placing sensors at positions which only allow an insufficient measurement of relevant temperatures and by an inadequate selection of settings at run-time respectively by delaying control signals, it may be possible to bring the controller to operate switches that conflict with the goal of a maximum solar energy.

KT-Elektronik SOL3-7

5.2 Storage

The storage is only charged until the maximum allowed temperature is reached. Using factory default settings, charging the storage already ends at 60°C. Falling below 58°C would initiate a new charging cycle. If the water is routed to extraction points directly, there is a scalding danger at higher temperatures. If using additional components – such as mixing taps – and therefore is no risk, higher storage temperatures can and should be allowed.

Too high temperatures may cause limescale that can negatively affect the performance of the heat exchanger.

Setting FS Value range Description

Storage tank 1Max A

PA3.03

60 °C 20...160 °C maximum storage tank temperature 1

(turn-off condition)

Storage tank 1Max E

PA3.04

58 °C 20...160 °C maximum storage tank temperature 1

(turn-on condition)

The controller supports the selective charging of two storages, e.g. a storage tank and a heating buffer storage. Depending on the achievable and the allowed storage temperature, the solar heat is lead to the storage by means of a switching valve respectively two separate pumps. The two (logically existing) storages can also be realized by using a stratified storage with alternative adapters for thermal layering.

Setting FS Value range Description

Storage tank 2Max A

PA3.05

60 °C 20...160 °C maximum storage tank temperature 2

(turn-off condition)

Storage tank 2Max E

PA3.06

58 °C 20...160 °C maximum storage tank temperature 2

(turn-on condition)

The solar thermal controller SOL3-7 is used to transfer the usable solar energy into the storage tanks in systems with two storage tanks according to the priority presetting and the programmed parameters. The scope of application of the saved energy is irrelevant for this process. Differing from the system variants shown in chapter 4, the domestic water heating and/or the heating circuit can be feeded by storage tank 1 (with SF1) and/or storage tank 2 (with SF2). Additional equipment for charge reversal can be also provided.

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Storage tank priority

Depending on the usage, it could make sense to reach a higher temperature in one of both storage tanks or to reach a uniform allocation of the collected energy. The parameter Type of storage tank priority is used to determine the solar controller mode of operation.

Setting FS Value range Description

Type of storage tank priority

PA3.07

3 1...5 The following table

Priority mode

Function Description

1 hard priority

Max

Storage tank 2 is only charged if the maximum temperature in storage tank 1 has been reached

2 hard priority

Min.

Storage tank 2 is only charged if the minimum temperature in storage tank 1 has been exceeded.

PA3.08 - Minimum storage tank temperature for charging

3 soft priority Storage tank 1 is always charged if the collector temperature is

sufficient to charge it. If not sufficient to charge storage tank 1 but sufficient to charge storage tank 2, charging of storage tank 2 is initiated.

PA3.09 - Charging time for low priority storage tank After the lapse of the specified time (Charging time for low

priority storage tank, FD 15 minutes), charging is interrupted for the minimum idle time (see section 5.1). At the end of this interruption it is newly decided if the temperature is sufficient to charge storage tank 1.

4 alternating

charge

The storage with the lowest temperature is charged first. Once the currently charged storage tank becomes warmer by more than 5K compared to the other one, charging is switched to the colder storage tank. Switching can occur several times.

5 no priority Both storages tank are charged having equal priority, that is, the

storage tank with the lower temperature is charged first. If charging is not interrupted, the storage tank is charged to its maximum temperature and only then switched to charge the other storage tank.

5.3 Swimming pool

The solar controller SOL3-7 is suitable for the solar heating of swimming-pools. Any usable solar energy is transferred in a swimming pool, which can be selected as a storage tank 1 or storage tank 2 with the given storage tank priority mode.

The maximum storage tank temperature (temperature of the swimming-pool) is to the need to adapt.

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5.4 Collector return flow sensor, Collector flow sensor

In several systems, the sensors for collector temperature and for storage tank temperature are not really appropriate to decide if the collector pump should be already turned off or not. It is possible that fluid with a higher temperature than measured by the storage tank sensor flows from the storage tank to the collector, e.g. because of layering in the storage tank. It is also possible that the temperature measured by the collector sensor differs from the one of the heat carrier medium entering the storage tank. Both can result to a senseless continued operation of the collector pump even without sunshine, until the temperatures have changed.

A reliable turn-off criteria can be obtained by using a return flow sensor (CRF), and even better by using both, a flow sensor (CVF) and a return flow sensor (CRF). By activating the function block CO3-FB08 collector return flow sensor, turning off the collector pump is not based on the difference between CF and SF any more, but on the difference between CF and CRF.

If a collector flow temperature sensor is also present (function block CO3-FB08 = On), the temperature difference between CVF and CRF is also relevant to turn off the pump.

Function FS Description

CVF

CRF

CO3 -> F07 Collector flow sensor active

CO3 -> F08 Collector return flow sensor active

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5.5 Measurement of solar power and solar energy

To document the solar gain of the solar system, a heat meter has been implemented, which determines the heat quantity provided by the solar system by means of the flow and return flow temperature and a flow volume sensor (quantity impulse generator) respectively a flow volume sensor replacement value.

The temperature difference between flow and return flow is proportional to the energy transferred into the storage at a given flow rate. The controller displays the current solar energy and the current day total if the function block CO3-FB05 energy measuring has been activated.

If the flow volume sensor (VST) is missing, a fixed flow rate can be set. This value is used as substitute for the flow volume value when the pump is running.

The following alternatives are possible depending on the existing sensors:

Sensors Turn-off criteria Power and energy measurement CF, SF CF - SF not available CF, SF, CRF CF - CRF A fixed flow rate value is assumed (not

available with rotation speed control), eventual measurement errors at CF

CF, SF, CRF, CVF CVF - CRF A fixed flow rate value is assumed (not

available with rotation speed control)

CF, SF, CRF, VST CF - CRF Flow rate is measured, eventual

measurement errors at CF

CF, SF, CRF, CVF, VST CVF - CRF Flow rate is measured, highest accuracy

achievable

In order to calculate the power and energy, the controller has to know the heat capacity of the heat carrier medium. This value depends on an eventually used antifreeze fluid, its concentration and the temperature. The heat capacity of water is approx. 1.16 Wh/(lK) respectively. 4.18 kJ/(kgK) at 25 °C and approx. 1.12 Wh/(lK) respectively 4.03 kJ/(kgK) at 100°C. The necessary specifications when using antifreeze fluid (solar fluid) can be obtained from the antifreeze manufacturer.

The impulse factor specifies the flow rate in litre, after which an impulse is sent by the sensor. This value should be found on the package or in the data sheet of the flow sensor. If the sensor expects impulses/m³ instead of l/Impulse, the value has to be converted:

e. g. 100 impulses/m³ are equivalent to 0.01 m³/impulse respectively 10 l/impulse If the capacity is given in Wh/(kgK), the value has to be converted to Wh/(lK) by means of

the fluid density. Some general notes on the conversion of heat capacity values:

• 1 watt hour (Wh) = 3600 watt seconds (Ws)

• 1 watt hour (Wh) = 3600 joules (J)

• 1 kilowatt hour (kWh) = 1000 watt hours (Wh)

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Function FS Description

Energy measurement

Heat capacity 25°C

Heat capacity 100°C

Correcting factor

1.16

1.12

1.00

CO3 -> F05 – 1 – Heat meter active

Heat capacity of carrier medium at 25 °C in Wh/ (Litre*K) / 0.3 to 2.5 Wh/(LK)

Heat capacity of carrier medium at 100 °C in Wh/ (Litre*K) / 0.3 to 2.5 Wh/(LK)

Correction factor / 0.2 to 2.5

Volume flow rate

Impulse factor

Volume flow replacement value

500

CO3 -> F06 – 1 – impulse capture active

Impulse factor for flow volume sensor / 1 to 250 litre/impulse

CO3 -> F06 – 0 – Flow replacement value active

Flow volume sensor replacement value/ 10 to 5000 litre/h

5.6 Rotation speed control

It might make sense to run the pump with a lower flow rate at low solar radiation. By doing so, the following can be achieved:

–a higher temperature is reached at the collector. This impairs the efficiency of the collector, but allows to heat up a small amount of water in the storage.

–the power consumption of the pump is reduced. Basically, the turn on and off conditions for the pumps apply as without rotation speed

control. Additionally, the 0...10V-output is provided with rotation speed information when the pump is running.

The following speed control modes are available: 1 - Constant temperature difference The rotation speed is regulated such that the temperature at the collector is higher by a

certain value (factory default setting 8K) than at the storage. The programmed value is usually exceeded at high solar radiation, what causes the pump to run at 100%. Once the difference drops below the set-point, the flow rate is reduced. The temperature in the collector flow thereby increases again and the difference remains at the set-point.

If a return flow sensor is present, the temperature difference between the collector sensor and the return flow sensor is corrected, if flow and return flow sensor exist, then the difference between these two is corrected.

2 - Constant collector temperature Only the collector temperature (or collector flow sensor, if present) is considered. It is

adjusted to the programmed set-point (e.g. 60°C). The programmed value is usually exceeded at high solar radiation, the controller runs the pump at 100%. If the solar radiation becomes weaker, so that the temperature drops below the set-point, the controller reduces the rotation speed of the pump, thereby the heat carrier medium remains for a longer period in the collector and the temperature increases again. In case the solar radiation decreases such that the temperature can't even be hold at the minimum rotation speed set (e.g. 30%), then the controller signalizes 0% which equals 0V which turns the pump off if this has not been done yet by means of a normal turn-off condition.

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A rotation speed control is only available for one single pump. This might therefore not be reasonable for system variants with more than one pump. In system variants with external heat exchanger, the storage circuit rotation speed is always regulated whereas the pump (s) in the collector circuit are run with a constant rotation speed. A uniform temperature distribution in the collector is achieved this way, which improves the collector efficiency.

The SOL3 controller has a 0...10V-output that can be connected to the input of a corresponding pump. Parameter settings can curtail the voltage range of this variable:

If the calculated value is above the programmed maximum rotation speed value, a signal for 100% is sent (corresponding to 10 V output). If the calculated value is below the programmed minimum rotation speed a signal for 0% (corresponding to 0 V output) is sent.

The calculation is based on a PID algorithm, whose parameters can be customized.

Function FS Description

Rotation speed mode

Rotation speed set-point

Minimum rotation speed

Maximum rotation speed

PID control parameters

100%

2.0 120 s 0 s

CO3 -> F04 Mode of rotation speed control / 1...2

Set-point for rotation speed control / 1...100 °C

respectively K (Differential or absolute value)

Minimum rotation speed / 0 ... 50%

Maximum rotation speed / 50 ... 100%

KP (boost) / 0.1 to 50.0 TN (reset time) / 1 to 999 s TV (retention time) / Do not change value!

5.7 Collector overheating protection

If the collector temperature exceed this maximum value (default factory setting is 130°C), it is assumed that steam is already in the system, and therefore no circulation takes place any more. The collector pump is turned off in this case until the temperature dropped to a lower value (default factory setting is 110°C).

Setting FS Value range Description

Collector-Max A PA3.10

130 °C 90 ... 160 °C Maximum collector temperature

(turn-off condition)

Collector-Max E PA3.11

110 °C 90 ... 160 °C Maximum collector temperature

(turn-on condition)

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5.8 Collector minimum temperature

A minimum collector temperature can be set, underneath which the pump is not turned on at all. This can be reasonable in cases where it is known that the solar gain ratio lays below the pump power ratio.

A very low temperature can be set if this function is not desired (e.g. -20°C)

Setting FS Value range Description

Collector-Min A PA3.12

30 °C -20 ... 50 °C minimum collector temperature

(turn-off condition)

Collector-Min E PA3.13

35 °C -20 ... 50 °C minimum collector temperature

(turn-on condition)

5.9 Start up function

There are collectors, in particular vacuum tube collectors, but also conventional flat-laying collectors, where measuring of the carrier medium temperature is insufficiently supported. A start-up function makes sense for systems with such collectors in order to determine the carrier medium temperature.

The temperature at the collector sensor only slowly increases even if the collector is illuminated by the sun. The start-up function can be activated for these cases:

This function can only be used if the collector temperature is below the turn-on threshold but above the collector minimum temperature. In case that the temperature at the collector sensor increases by 5K within 10 minutes, the pump is turned on briefly (20 s). This leads to a transport of heat, and with sufficient radiation to an excess of the turn-on condition at the collector sensor. This start-up function is repeated every 20 min if necessary.

Function FS Description

Start up function CO3 -> F03- 1

0 Cyclic test-step switching of the collector pump (s)

5.10 Forced pump operation (blocking protection)

If the pumps have not been turned on for 24 hours, they are turned on by force on midday to prevent that they get stuck in long term idle periods.

Function FS Description

Forced pump operation CO3 -> F01- 1

0 Regular forced pump operation

The forced collector pump operation is suppressed if the related collector sensor measures a temperature below 10 °C.

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5.11 Collector Antifreeze

Solar systems with no antifreeze medium can be run in regions where frost just appears sporadically. In case that the temperature really should drop below the dew point, the controller is able to turn on the pump in order to prevent a freezing of the collector.

Operation: The collector pump is turned on if the temperature at the collector sensor drops below 5 °C. At 6 °C it is turned off again, but only after the minimum running time set elapsed.

The following icon additionally appears if the pump is turned on for antifreeze purpose.

Function FS Description

Collector antifreeze CO3 -> F02- 1

0 Collector antifreeze

In system variants with two collector arrays and switching valve (system variant 2.... ), the

collector array where the temperature falls below the dew point last is not flown through before the temperature in the first array has increased.

5.12 Two collector arrays

Depending on the structural conditions, it may be necessary to install the two collectors each pointing in a different direction. The controller can be used in systems operating in parallel mode with two collector arrays with one array having priority over the other. This is basically predetermined by configuring the system to operate with two collector pumps or with one pump and a switching valve.

The heat transport is controlled independently for each array according to the above described criteria. In system variants with two collector arrays and switching valve, the array with the higher energy supply has precedence.

In system variants with two collector arrays and two collector pumps, it is generally recommended to install a collector return flow sensor CRF. Only by knowing the return flow temperature, it can't reliably be determined whether the power is delivered to the storage or not.

Setting FS Value range Description

Array minimum running time

PA3.14

60 s 0...1800 s Minimum running time for array before

switching

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Notes: This function leads to transferring the heat out of the storage to the collector. It is

only suitable for regions with mild climate. The storage may not be able to provide sufficient energy during strong freeze periods to protect the collector from freezing.

This function should not be used in systems with antifreeze.

KT-Elektronik SOL3-7

5.13 External heat exchanger

When operating installations with system separation of collector and storage tank, an external heat exchanger may be installed. An additional exchanger pump CTP is required in this case.

Turn-on condition: The start of the exchanger pump CTP is delayed by the setting 'turn-on delay CTP', if the temperature difference between collector and storage still matches the turn-on condition after one of the collector pumps CP1/CP2 have been turned on. If the temperature difference drops below the turn-on condition after the collector pump CP1 or CP2 has been turned on, the exchanger pump is not turned on.

Turn-off condition: The exchanger pump CTP is turned off with a defined delay 'CTP postrun time' once the turn-off condition for the collector pump CP1 or CP2 has been reached.

The turn-on delay and the post-run time depend on the system (pipe length, flow rate, exchanger capacity).

Setting FS Value range Description

Turn-on delay CTP PA3.15

120 s 0 to 250 s Turn-on delay for the collector exchanger

pump CTP

Post-run time CTP PA3.16

10 s 0 to 250 s Post-run time for the collector exchanger

pump CTP

An optional collector flow temperature sensor CVF located in the collector circuit may be used to reduce the turn-on delay and the post-run time in order to increase the efficiency of the solar system. The exchanger pump CTP is turned on once the collector flow sensor has reached the turn-on condition (temperature difference between collector flow and storage tank) and one of the collector pumps CP1/CP2 is running.

Function FS Description

CVF for CTP CO3 -> F09- 1

0 Collector flow temperature sensor CVF for heat

exchanger pump CTP active CO3 -> F07 – 1 - (CVF) required

5.14 Auxiliary heating with secondary heat generator

An additional heat generator is required in several systems where a solar fraction of 100% can't be expected. The secondary heat generator may be an oil or gas boiler, an electric cartridge heater or a district heating network.

Scheduled time ranges to hold a specific stand-by temperature can be set for nominal (day-time) and reduced (night-time) operating mode.

Once the temperature falls below the programmed set-point for the storage tank, the secondary heat generator is activated and remains active until the temperature at the storage tank sensor SF1 reaches the set-point again.

The setting 'Offset with CP On' can be used to specify that the auxiliary heating is only turned on if the storage temperature is considerably too low (e.g. 20K), in cases where one of the collector pumps CP1/CP2 is running. Hereby it is possible to use an energetically

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more favourable heat source with just a slight impairment of comfort. The collector circuit has no impact on auxiliary heating if this parameter is set to 0K (default factory setting).

Secondary heat generators allow thermal disinfection.

Setting FS Value range Description

Day-time storage tank set-point

PA4.01

45 °C 5 to 90 °C Storage tank temperature set-point

for nominal operating mode (day-time)

Night-time storage tank set-point

PA4.02

10 °C 5 to 90 °C Storage tank temperature set-point

for reduced operating mode (night-time)

Hysteresis PA4.03

5 K 0 to 30 K Hysteresis for storage tank temperature

Offset with CP On

PA4.04

0 K 0 to 20 K Auxiliary heating delay temperature difference

with running collector pump

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6 Heating circuit functions

The following sensors are available for the heating circuit: VF Flow sensor AF Outdoor sensor RF Ambient/Room sensor AF and RF can individually be activated and deactivated at configuration level CO1. All available controller functions can only be used if all sensors are installed. A weather-

compensated control is not available without an outdoor sensor, a room control is not available without a room sensor. The flow sensor is always required.

6.1 Prescribing the room temperature set-points

The controller can be programmed with changes in temperature for the flow temperature of night (set-point night) and day (set-point day) of the heating circuit, for which fictitious setpoints are used. An increase of the standard room temperature (20 °C for the day and 15 °C for the night) will cause an increase of the flow temperature - a reduction will cause the opposite.

The domestic water circuit allows setting the desired temperature the water should be heated up to by means of auxiliary heating.

6.2 Weather-compensated control

In weather-compensated control mode, the flow temperature is adjusted depending on the outdoor temperature. The heating characteristic of the controller defines the flow temperature as a function of the outdoor temperature (page 56). The outdoor temperature needed to control the temperature is measured by the outdoor sensor.

Function FS Description

Outdoor sensor AF CO1 -> F02 - 1

1 Outdoor sensor is present

6.2.1 Gradient characteristic

Basically, the following relation applies: when the outdoor temperature drops, the flow temperature rises. By varying the gradient and level parameters, the characteristic may be adjusted to meet custom needs. The "level" parameter shifts the characteristic in parallel up or down. Outside scheduled time ranges reduced set-points are used for control: The reduced flow rate set-point is calculated as the difference between the entered values for daytime operation and the flow temperature drop. The parameters for maximum and minimum flow temperature limit the temperature up- and downwards.

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Advices to adjust gradient and level:

• If the room temperatur in cold season don't rises up to the room temparture

setpoint the Gradient needs to be increased.

• If the room temperatur in cold season rises over to the room temparture set-point

the Gradient needs to be increased.

• If the room temperatur in mild season don't rises up to the room temparture

setpoint the Level needs to be increased and Gradient needs to be decreased.

• If the room temperatur in mild season rises over to the room temparture set-point

the Level needs to be decreased and Gradient needs to be increased.

Functions FS Configuration

4-point heating characteristic 0 CO1 -> F11 - 0 Setting FS Parameter level / Value range

Gradient, flow PA1.01

1,8* PA1 / 0,2 to 3,2

Level, flow PA1.02

0 °C 0 to 30 °C

Minimum flow temperature PA1.06

20 °C PA1 / 5 to 130 °C

Maximum flow temperature PA1.07

50 °C* PA1 / 5 to 130 °C

* for CO1 -> F05 - with value 1 applies to: gradient, flow / 0.2 to 1.0 (1.0)

Maximum flow temperature / 5 to 50 °C (50 °C)

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Example characteristic settings:

-Old building, radiator performance/layout 90/70: gradient approx. 1.8

-New building, radiator performance/layout 70/55: gradient approx. 1.4

-New building, radiator performance/layout 55/45: gradient approx. 1.0

-Underfloor heating depending on laying: gradient below 0.5

6.2.2 4-point characteristic

By means of the 4-point characteristic one can define its own heating characteristic. The characteristic is determined by 4 points each of the outdoor temperature, the flow temperature, the reduced flow temperature and the return flow temperature. The parameters for maximum and minimum flow temperature limit the temperature up- and downwards.

Functions FS Configuration 4-point characteristic

characteristic

0 CO1 -> F11 - 1

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Setting FS Parameter level / Value range Outdoor temperature

Point 1 (P1) Point 2 (P2) Point 3 (P3) Point 4 (P4)

–15 °C –5 °C 5 °C 15 °C

PA1 / -40 to 50 °C

Flow temperature Point 1 (P1) Point 2 (P2) Point 3 (P3) Point 4 (P4)

70 °C 55 °C 40 °C 25 °C

PA1 / 5 to 130 °C

Reduced flow temp. Point 1 (P1) Point 2 (P2) Point 3 (P3) Point 4 (P4)

60 °C 40 °C 20 °C 20 °C

PA1 / 5 to 130 °C

Minimum flow temperature PA1.06

20 °C PA1 / 5 to 130 °C

Maximum flow temperature PA1.07

90 °C* PA1 / 5 to 130 °C

*for CO1 -> F05 -with value 1 applies to: Maximum flow temperature / 5 to 50 °C (50 °C)

6.3 3-point control

The flow temperature can be regulated by means of a PI algorithm. The valve responds to impulses sent out by the controller in case of deviations. In particular, the length of the first impulse depends on the size of the deviation and the boost KP (the impulse length grows with increasing KP). The length of the impulse and the pauses in between change continuously until the deviation is corrected. The pause duration mainly depends on the reset time TN (pause duration increases with increasing TN). The valve transit time TY specifies the time the valve needs to open or close from 0 to 100 %.

Functions FS Configuration 3-point control mode 1

2.0 120 s 0 s 45 s

CO1 -> F12 - 1 KP (boost) / 0.1 to 50.0

TN (reset time) / 1 to 999 s TV (retention time) / Do not change value! TY (valve transit time) / 5, 10, 15, , 240 s

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Note: The 4-point characteristic can only be activated as long as the function adaptation is deactivated (CO1 -> F08 - 0).

KT-Elektronik SOL3-7

6.4 Two-point control

The flow temperature can, for example, be controlled by switching a valve on and off. The valve is turned on once the flow temperature drops T = 0,5 x differential gap below the setpoint. Once the flow temperature exceeds T = 0,5 x differential gap the valve is turned off again. The larger the differential gap is chosen, the lower the switching frequency. By entering a minimum running time, the valve stays on for the specified period regardless of the flow temperature. A valve that has been turned off due to the temperature conditions as well keeps turned off for the period entered as minimum idle time regardless of the flow temperature.

Functions FS Configuration 3-point control mode 1

5 °C 2 min 2 min

CO1 -> F12 - 0 Differential gap / 1 to 30 °C

minimum running time / 0 to 10 min minimum idle time / 0 to 10 min

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6.5 Underfloor heating/screed drying

By setting the function F05 to -1 in function block CO1, the associated heating circuit is configured to work as an underfloor heating circuit. In the first place, this action only limits the value ranges of the heating characteristic gradient and the maximum flow temperature in level PA1:

● Value range for the gradient: 0.2 to 1.0

● Value range for the maximum flow temperature: 5 to 50 °C

Moreover, the function screed drying may be activated. The parameters displayed right after activation of this function block are to be seen in this context. Pre-defining the screed drying schedule: the heating up phase always starts with a temperature of 25 °C. The temperature is then raised by the value set for the temperature increase every 24 hours – if using the factory default settings, the flow temperature will raise to 30 °C within the first 24 hours. Once the maximum temperature has been reached, it is hold for the period of days defined for the "maximum temperature holding days". The parameter defines the temperature decrease schedule. By setting the temperature decrease value to zero, the unit switches directly to "automatic operating mode" after the holding temperature phase. The process is started by switching from STOP to START after having set the parameter for the temperature decrease. The process can be monitored when displaying the flow temperature ( ) of the corresponding heating circuit at information level:

Temperature raise phase Temperature holding phase Temperature decrease phase

If the additional symbol displayed in the flow temperature screen disappears after the last phase, the drying process was completed successfully.

The STOP symbol indicates a flow temperature deviation of more than 5 °C over a period of more than 30 minutes. In such cases, the process is aborted by the controller. Whilst the STOP symbol is shown, a flow temperature of 25 °C is hold. Any power failure during the process, or STOP indication, will reset the drying process leading to a complete restart. In systems where the active drying process would have to be interrupted due to a domestic water heating cycle, no storage tank charges are performed unless they act as antifreeze charge/frost protection.

Functions FS Configuration Underfloor heating

Screed drying

0 5 °C/24 h

45 °C 4 0 °C/24 h STOP

CO1, 2 -> F05 - 1 Temperature increase / 1 to 10 °C/24 h

Maximum flow temperature / 25 to 60 °C Maximum temperature holding time / 1 to 10 days Temperature decrease / 0 to 10 °C/24 h START

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Note: Accessing the function block parameters after the function has been initiated is only possible if the function block is deactivated and reactivated again.

Attention: The function screed drying can only be used if the energy supply is ensured for the entire duration. Auxiliary heating must be usually available.

KT-Elektronik SOL3-7

6.6 Deactivation depending on the outdoor temperature

6.6.1 OT deactivation temperature for daytime operating mode

Once the outdoor temperature exceeds the threshold entered for the daytime operating mode, the heating circuit to which the value applies is deactivated. The valve closes and the pump is shut-off after t = 2 x valve closing time. When the temperature drops below the threshold (minus a differential gap of 0.5 °C) heating is immediately resumed. If default factory settings are used, heating is deactivated at 22 °C during the warm seasons.

Setting FS Parameter level / Value range OT deactivation temperature for

daytime operating mode PA1.08

22 °C PA1 / 0 to 50 °C

6.6.2 OT deactivation temperature for night-time operating mode

Once the outdoor temperature exceeds the threshold entered for the night-time operating mode, the heating circuit to which the value applies is deactivated.

The valve closes and the pump is shut-off after t = 2 x valve closing time. When the temperature drops below the threshold (minus a differential gap of 0.5 °C) heating is immediately resumed. If default factory settings are used, at 15 °C outdoor temperature at night, the system deactivates itself in order to save energy. However, when using these settings, it should be taken into account that the system needs time in the morning to heat up the building.

Setting FS Parameter level / Value range OT deactivation temperature for

night-time operating mode PA1.09

15 °C PA1 / -20 to 50 °C

6.6.3 OT activation temperature for daytime operating mode

A heating circuit working in automatic night-time operating mode is switched into daytime operating mode automatically once the temperature drops below the OT activation temperature. When the temperature exceeds the threshold (plus a differential gap of

0.5 °C) reduced operation is immediately resumed. This function is used to prevent an excessive cooling of the building during periods of big freeze outside scheduled time ranges.

Setting FS Parameter level / Value range OT activation temperature for

daytime operating mode PA1.10

–15 °C PA1 / –20 to 5 °C

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6.6.4 Summer operating mode (OM)

Relevant for switching into summer OM is the average temperature per day (measured and calculated between 07:00 and 22:00 hours) during the programmed time period. Once the calculated average OT exceeds the programmed OT for a consecutive number of days n, the summer OM is activated the following day: the valves of all heating circuits are closed and the circulating pumps are shut-off after t = 2 x valve closing time. Once the calculated average OT drops below the programmed OT for a consecutive number of days n, the summer OM is deactivated.

Functions FS Configuration Summer operating mode (OM) 0

01.06 2

30.09 1 18 °C

CO5 -> F04 – 1 Beginning of summer period /01.01 to

31.12 Number of days needed for activation / 1 to 3 End of summer period / 01.01 to 31.12 Number of days needed for deactivation / 1 to 3 Outside temperature threshold /0 to 30 °C

Note: The summer OM works only in automatic OM ().

6.7 Delayed outside temperature compensation

To determine the flow temperature set-point, the calculated OT is used. The temperature is compensated with a delay at increasing and/or dropping temperatures. A sudden change in temperature of e.g. 12 °C at a delay setting of 3 °C/h, the calculated outdoor temperature is adjusted in small increments over a period of t = (12 °C)/(3 °C/h) = 4 hours to meet the real outdoor temperature.

The calculated OT is shown.

Functions FS Configuration Delayed outside temperature

compensation at dropping temperatures

0 CO5 -> F05 - 1

Delayed outside temperature compensation at increasing temperatures

0 CO5 -> F06 - 1

3 °C/h Delay / 1 to 6 °C/h

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Note: This function can avoid a surcharge of the heating system in conjunction with an overheating of buildings, eg during warm wind influences (Foehn) or because of a low heating performance due to a strong solar radiation on the outdoor sensor. In the operating level, a delayed active outdoor temperature compensation is indicated on the display by a flashing outside temperature readout.

KT-Elektronik SOL3-7

6.8 Remote operation

In all system variants a room temperature sensor including operating mode selector is connectable on terminal No. 5. Other functions of the terminal like binary contacts are deactivated in this case.

Apart from measuring the room temperature, a Room Panel (Pt 1000 sensor) provides the selection of the following operating modes to influene the control process:

• Automatic mode

• Daytime mode

• Night-time mode

With an activated room sensor, the measured room temperature is displayed when the remote operation is connected and activated. Nevertheless, it is not used for control unless the Optimization, Adaptation or Flash adaptation functions have been activated.

Functions FS Configuration Room sensor RF 0 CO1 -> F01 - 1

6.9 Optimization

A room temperature sensor is required to be able to use this function. The controller adaptively calculates the time (maximum 8 hours) needed to preheat the reference room to the temperature set-point for the daytime OM at the beginning of the scheduled time in dependence on the building characteristics The system heats with the maximum flow temperature during preheating. It is gradually built up in 10 °C increments. Weather controlled OM takes over once the temperature set-point for the daytime OM is reached.

In dependence on the room sensor, the controller switches the heating off up to one hour before the lapse of the scheduled time. The moment is chosen in such a way that the temperature only drops marginally below the room temperature.

The following symbols on the screen flash during periods of preheating and early heating shut-off respectively .

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The controller monitors the night-time set-point outside the scheduled time ranges (reduced room temperature). Once the temperature drops below the night-time set-point, the system heats at maximum flow temperature until the temperature set-point is exceeded by 1 °C.

Functions FS Configuration Room sensor RF 0 CO1 -> F01 - 1 Outdoor sensor AF 1 CO1 -> F02 - 1 Optimization 0 CO1 -> F07 - 1

Setting FS Value range Set-point daytime OM

PA1.11

20 °C 0 to 40 °C

Set-point night-time OM PA1.12

15 °C 0 to 40 °C

6.10 Raise return flow of external heating system

A considerable interest of solar thermal systems is designed not with solar cash ratio of 100%, but the solar thermal is of 'only' a secondary energy source. Hence, it makes sense to create the possibility for the typical boiler heating systems, to offer a heating support about a heating circuit flow temperature increase.

6.10.1 Main principle

A boiler or an other heat source is a primary energy source for heating circle and domestic hot water preparation. This primary energy source works selfsufficiently, therefore the compact solar controller SOL3-7 has no influence on their function.

The heating circuit return flow is equipped with the sensor RüF. An switching valve RUV enables to route the heating circuit return flow through the solar warmed up storage tank.

The switching valve RUV becomes active if the storage tank temperature SF1 exceeds the heating circuit return flow temperature (RüF) at least a adjusted value return temperature increase offset.

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Note: Sun exposure can lead to an increased room temperature, and thus to an early heating shut-off. Within a short non-usage period, a drop in the room temperature can trigger an early initiation of the preheating process targeting the daytime set-point.

KT-Elektronik SOL3-7

If the heating circuit pump UP is active, the heating circuit return flow is warmed up, so that less energy must be supplied by the primary energy generator.

6.10.2 Implementation

The range of the function described in chapter Temperature difference controller (page 69) is not active after reset to factory default settings resp. Setting the system variant ID.

The return flow temperature sensor RüF is realised with the terminal number 2 which was shown for heating circuit flow temperature sensor, because without heating circuit the heating circuit flow temperature sensor has no function. The storage tank temperature sensor SF1 (terminal number 7) will be used with no modification.

The switching valve RUV is realised with binary output DO 5 on terminal number 27 (UP). On the display the switching valve RUV is shown in the control circuit 1 with the symbol 'mixing valve up' , not as a heating circuit circulation pump.

In the settings level CO3 is to adjust the return flow temperature increase offset as Temperature difference set point. The hysteresis is fixed to +/- 2 K and is not adjustable. The functionality raise return flow is not prevented about usage schedule, summer operating mode or other functions.

The state of the binary output to control the switching valve RUV (named TdS) can be changed in the manual operating mode.

Functions FS Configuration Temperature difference control

(TDR)

0 CO3 -> F10 – 0 Off (1 On)

Function block parameter FS Range

Temperature difference set point 10K -30...+160 °C Reference input 2 Terminal number 1...9 Controlled input 7 Terminal number 1...9

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7 Domestic water circuit functions

7.1 Domestic water heating in storage tank

The domestic water circuit allows setting the desired temperature the water should be heated up to by means of auxiliary heating.

Setting FS Parameter level / Value range Set-point domestic water Daytime Operation

PA4.01

45 °C PA4 / 5 to 90 °C

Set-point domestic water Night-time operation

PA4.02

10 °C PA4 / 5 to 90 °C

Differential gap

PA4.03

5 K PA4 / 0 to 30 K

Temperature difference to delay auxilary heating when collector pump is active

PA4.04

0 K 0 to 20 K

7.2 Thermal Disinfection of the storage tank

A usage schedule is used in systems with domestic water heating to perform a thermal disinfection in order to reduce the Legionella risk. The storage tank with storage sensor SF1 is heated up to defined the Disinfection temperature. The process begins at the programmed time Start time and ends not later than the programmed Stop time.

In systems with solar domestic water heating, thermal disinfection is performed outside scheduled time ranges depending on the solar gain. The controller monitors the storage temperatures and disinfection intervals in order to reduce the consumption of additional energy (auxiliary heating).

Too high temperatures due to thermal disinfection may cause limescale that can negatively affect the performance of the heat exchanger.

Function FS Description

Thermal disinfection

Day of week

Start time

Stop time

Disinfection temperature

00:00

70 °C

CO4 -> F14- 1 - Thermal disinfection

Actuation day(-s) / 1...7 or 1-7 (1..Monday,...)

Beginning of thermal disinfection

End of thermal disinfection

Min. storage temperature for thermal disinfection / 50 to 90 °C

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8 System wide functions - all system variants

8.1 Automatic summer/winter switching

Switching is done automatically on the last Sunday in March at 2:00 am and on the last Sunday in October at 3:00 am.

Functions FS Configuration Summer/winter switching 1 CO5 -> F08 - 1

8.2 Antifreeze

Antifreeze measures become effective once the outdoor temperature drops below the programmed temperature threshold. The differential gap to deactivate the antifreeze measures is 1°C.

I. Antifreeze program I (reduced antifreeze): Antifreeze measures are only initiated if all

heating circuits are running in stand-by mode. All circulation pumps are turned on by force and their flow temperature is set to 10°C. The circulation pump for the domestic water circuit is only turned on by force if the rotary switch is positioned at stand-by mode for all heating circuits. However, the storage tank is always recharged to 10°C in cases where the storage tank temperature drops below 5°C.

II. Antifreeze program II: The circulation pumps for the heating circuits are generally turned

on by force. The flow temperature set-points of all heating circuits in holding operating mode or stand-by mode are set to +10 °C. The circulation pump for the domestic water circuit is generally turned on. If the storage tank temperature drops below +5 °C, the storage tank is recharged to +10 °C.

Functions FS Configuration Antifreeze program I

3 °C

CO5 -> F09 - 0 Antifreeze threshold/ –15 to 3 °C

Antifreeze program II

3 °C

CO5 -> F09 - 1 Antifreeze threshold/ –15 to 3 °C

Minimum temperature of storage tank

10 °C

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Note: Antifreeze mode for a pump, a heating circuit or a domestic water circuit is only active if the antifreeze symbol is shown in the display. Antifreeze monitoring is deactivated in stand-by mode in systems with fixed value control without outdoor sensor.

Installation and operating manual KT-Elektronik

8.3 Locking manual operating mode

This function can be used to lock the manual operating mode in order to protect the heating system. When activated, the system is run in automatic mode when the rotary

switch is positioned at .

Functions FS Configuration Locking manual operating mode 0 CO5 -> F21 - 1

8.4 Locking the rotary switch

When activated, the system is run in automatic mode regardless of the rotary switch position. No further settings can be programmed using the rotary switch.

Functions FS Configuration Locking the rotary switches 0 CO5 -> F22 - 1

8.5 Enter a valid individual access code

The standard access code can be replaced by an individual code to prevent unauthorized function or parameter changes. The individual code can be selected from 0100 to 1900.

Procedure:

Switch to configuration and settings level. Enter access code 1995 (key number). Confirm access code 1995.

Display: 1900 (Number is not inverted, but provided to edit) Enter the current valid access code. Confirm code.

Display: Current, even confirmed access code (inverted) Edit individual code. Confirm entered individual code.

The new valid access code is from now on the one confirmed.

Move the rotary switch back to the "Information level" position (left hand).

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8.6 Temperature difference controller

To applicate a raise return flow temperature of a seperate heating circuit, to realize tank-totank transfer or to charge or discharge of heating energy there is designed one additional temperture diffrence controller inside.

The temperature sensors used for this function may be used additionally to the defined function in the chosen system variant (example: storage tank temperature sensors SF1 and SF2).

The relay output is fixed to terminal number 27 (UP). This define requires that the additionally temperature difference controller is not available in system variants including heating circuit.

Settings

Functions FS Configuration Temperature difference control

(TDR)

0 CO3 -> F10 – 0 Off (1 On)

Function block parameter FS Range

Temperature difference set point 10K -30...+160 °C Reference input 2 Terminal number 1...9 Controlled input 7 Terminal number 1...9

The facrory default setting of these parameteres is designated to use raise return flow temperature of a seperate heating circuit.

Function

The switching relay output terminal number 27 (UP) becomes active, if the difference of reference input and controlled input exeeds the temperature difference set point.

The switching relay output terminal number 27 (UP) becomes inactive, if the difference of reference input and controlled input falls below the temperature difference set point.

The hysteresis is fixed to +/- 2 Kelvin. In the information level sensors (reference input and controlled input) where shown

each with the terminal defined symbols. The switching output visualizes the symbol

(responsible für circuit 1 mixing valve up signal).

In “Manual operating mode” the switching output may be modified when shown the indication 'TdS'.

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9 Malfunction

A system malfunction is immediately shown on the display by a overlapping frame on system scheme.

The error level including detailed messages is opened by pressing the rotary pushbutton. A larger number of error messages might eventually be retrieved by turning the rotary pushbutton. Error messages for critical malfunctions are kept in the display loop even if the details are not opened by pressing the rotary pushbutton.

The display is illuminated for one second in intervals of about 10 seconds for the time of system malfunction

At error level, the error messages are displayed according to the following list.

9.1 Error list

Error 1 = sensor failure (chapter 9.2) Error 4 = maximum charge temperature reached Error 6 = temperature monitoring alarm(chapter 9.3) Error 7 = unauthorized access captured (chapter 9.3)

9.2 Sensor failure

According to the error list, sensor failures are indicated by the message "Err 1" at error level. Detailed informations can be retrieved at information level by querying the temperature values. Each sensor icon combined with three small horizontal bars instead of a temperature value indicate a faulty sensor. The following list describes how the controller behaves in case of a sensor failure for each single sensor.

Outdoor sensor AF: If an outdoor sensor fails, the system is run with value of

PA1.07 (maximum flow temperature set-point ), else, if not set or greater than 50 °C, with 50 °C.

Flow sensor, heating circuit: If a flow sensor in the heating circuit fails, the related

valve is opened to 30 %.

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Note: After a system variant ID change, eventual error messages are suppressed for around three minutes after the change.

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Flow sensor, solar circuit: If a primary flow sensor fails, the domestic water is not

heated up any more.

Storage sensor SF1/2: If one of these sensors fails, the buffer storage is not charged

any more.

9.3 Temperature monitoring

If the temperature in one of the control circuits deviates more than 50 K from normal for a period of 30 minutes, the error message "Err 6" is generated (temperature monitoring alarm).

Functions FS Configuration Temperature monitoring 0 CO5 -> F19 - 1

9.4 Error status register

The error status register is used to report controller or system failures. In modem operating mode with error reporting function, each change of error status triggers a dial up connection to the building control system (BCS) to report the status change. The errors that should affect the error status register can be set after having entered the access code

0025.

The default factory setting „465“ causes that only the error messages in bold in the following table affect the error status register.

Another example shows the value to be set for the change detection for sensor failure alarm and temperature monitoring.

Error message Description Decimal value FS Example Error 1 Sensor failure 1 1 1 Error 2 - 2 Error 3 - 4 Error 4 Max. charging temperature reached 8 Error 5 16 16 Error 6 Temperature monitoring alarm 32 32 Error 7 Unauthorized access 64 64 Error 8 - 128 128 Error 9 - 256 256

Sum Sum

Factory default setting, access code 0025 = 465

Example: Error status register if sensor failure and alarm = 33

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9.5 SMS delivery in case of a system failure

If a dial up modem is connected to the KOM232M (Mat-No. 11988) communication module (chapter 10.3), the controller is able to send error messages to a cell phone. An SMS is sent as soon as a failure is captured in the error status register. The message looks like this on the display of the cell phone:

[Date] [Time]

[Call no. of the controller]

Reglerstörung (Controller failure)

SOL3 # [Controller ID]

The time stamp [Date], [Time] is generated by the SMS provider rather than by the controller. A detailed error message is not available.

If Modbus and modem error reporting are active at the same time, the connection to the BCS is built up in the first place followed by the SMS delivery. If the connection to the BCS fails, the system attempts to build it up for the programmed number of times.

The providers SMS service numbers (TAPnr) in Germany at the time of writing are:

 D1: 0171 252 1002 (0171 252 1099 alternatively available)  E-Plus: 0177 1167  Cellnet (UK): 0044 786 098 0480 – mobile comm. network of D1, D2, O2 and E-Plus

0 respectively the pre dial number has to be prepended in telephone installations with secondary structure. The subscriber number (HAndi) has to be entered as follows: 49 xxx yyyyyy, with xxx for 160, 171 or other valid network prefix and yyyyyy for the specific recipient number.

Functions FS Configuration SMS 0 CO6 -> F08 – 1 Modem function 0 CO6 -> F03 – 1 Automatic modem configuration 0 CO6 -> F04 – 1

Parameter* FS Parameter level / Value range Modem dialling pause (P) PA6.04

5 min PA6 / 0 to 255 min

Modem time out (T) PA6.05

5 min PA6 / 0 to 255 min

Number of dial attempts (C) PA6.06

15 PA6 / 0 to 255

SMS service numbers (TAPnr) PA6.07

- PA6 / max 22 digits; 1, 2, 3, ..., 9, 0; „-“ End of string; „P“ Pause

Cell phone number (HAndi) PA6.08

- PA6 / max 22 digits; 1, 2, 3, ..., 9, 0; „-“ End of string; „P“ Pause

* chapter 10.8 („ Description of the adjustable communication settings“)

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Note: The controller ID is shown as the first value in the advanced information level

under Info 2 (chapter 1.10).

KT-Elektronik SOL3-7

10 Communication

The heat pump controller SOL3-7 can be connected to a building control system via an optional communication module. A suitable software allows to set up a complete building control system for process visualization and communication.

The following communication variants are available:

• Operation with USB connection with communication module USB-L3 (6)

• Operation with LAN connection with Modbus-TCP-Gateway (7)

• Operation with dial up modem with communication module KOM232M (3)

• Operation with dial up modem DataMod11 (4)

An automatic communication is basically only initiated in case of failures. The controller operates in an autonomous way, but can be contacted, read out and adjusted at any time via modem.

• 2-wire bus operation with communication module iCon485 (2)

or Modbus-MBus-Gateway (5)

• RS-232 connection operation with communication module KOM232PC (1)

All communication modules are designed for operation at the communication interface. The interface properties are not configurable.

Property Setting Baudrate 19200 Baud Data bit, Parity, Stop bit 8 Bit, no, 1 Stop bit

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10.1 Communication module KOM232PC

The connector for the optional communication module (Mat-No. 11988) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The operation of the controller in conjunction with the communication module KOM232PC requires the use of appropriate communication tools (software).

Wiring diagram for communication module KOM232PC

10.2 Communication module iCon485

The connector for the optional communication module iCon485 (Mat-No. 11994) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The operation of the controller in conjunction with the communication module iCon485 requires a permanent bus connection (data cable).

Each controller and control unit is wired to an open token ring. The end of the wire is connected to the building control system via an RS-485/RS-232 converter (e.g. CoRe01).

The bus connection range (cable length) is limited to a maximum of 1200 m. A maximum of 126 devices can be connected to such a segment. In segments with a longer distance (> 1200m) or in segments with more than 126 devices, repeater have to be installed to maintain the signal strength (e.g. CoRe01). On a bus with 8-bit addressing, a maximum of 246 devices can be connected and addressed.

In times where the communication between the building control system and controller is interrupted, interventions of the building control system into dynamic processes can be influenced with the function building control system monitoring for a limited period of time.

As long as valid Modbus queries are captured, the controller resets the time monitoring; but after a lapse of 30 minutes all collective level bits are reinitialized to "autonomous".

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Functions FS Configuration

Modbus 1 CO6 -> F01 – 1

Modbus with 16-bit addressing 0 CO6 -> F02 – 1

Modem function 0 CO6 -> F03 – 1

Automatic modem configuration 0 CO6 -> F04 - 1

Blocking the BCS dial up 0 CO6 -> F05

BCS dial up on corrected failures 0 CO6 -> F06

Control system monitoring 0 CO6 -> F07 – 0

Setting FS Parameter level / Value range

Station address (ST) PA6.01 bzw. PA6.02

255 PA6 / 1 to 247

with CO6 -> F02 - 1: 1 to 32000

Wiring diagram for communication module iCon485

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ATTENTION!

When installing, the relevant standards and regulations related to lightning protection and over-voltage/voltage surge protection have to be attended to.

Installation and operating manual KT-Elektronik

10.3 Communication module KOM232M

The connector for the optional communication module KOM232M (Mat-No. 11989) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The communication module KOM232M allows the connection of a dial up modem to the controller.

A dial up modem is required when connecting the controller to the telecommunication network. This way, the controller operates autonomously and is enabled to send a call to the building control system (BCS) in case of failures. Additionally, the BCS can call the controller to read it out and to send new data providing the valid access code after having written the holding register No. 40145.

The function modem dial up blocking can be selected in special cases in order to

suppress dial ups to report failures. With the function modem dial up on corrected failures the BCS is additionally informed if a previously reported failure no longer exists.

By using the automatic modem configuration function, the modem connected to the controller needs no further configuration; this is done automatically by the controller.

Functions FS Configuration

Modbus 1 CO6 -> F01 – 1

Modbus with 16-bit addressing 0 CO6 -> F02 – 1

Modem function 0 CO6 -> F03 – 1

Automatic modem configuration 0 CO6 -> F04 - 1

Blocking the BCS dial up 0 CO6 -> F05

BCS dial up on corrected failures 0 CO6 -> F06

Control system monitoring 0 CO6 -> F07 – 0

Setting FS Parameter level / Value range

Station address (ST) PA6.01 bzw. PA6.02

255 PA6 / 1 to 247

with CO6 -> F02 - 1: 1 to 32000

Modem dialling pause (P) PA6.02

5 min PA6 / 0 to 255 min

Modem time out (T) PA6.02

5 min PA6 / 0 to 255 min

Number of dial attempts (C)

PA6.02

15 PA6 / 1 to 255

Phone number of the BCS (TELnr) PA6.02

- PA6 / max 22 digits; 1, 2, 3, ..., 9, 0;

„-“ End of string; „P“ Pause

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Note: Once the holding register No. 40145 has been written for three consecutive times accessed with an invalid code, the controller cuts the modem connection immediately and generates an error message "Err 7" (Unauthorized access). Therewith a call to the configured building control system as well as an SMS delivery are triggered. Bit D6 is deleted as soon as the error status register is read out by the building control system and the connection is terminated.

KT-Elektronik SOL3-7

Wiring diagram for communication module KOM232M

10.4 Data Modem DataMod11

The connector for the optional data modem DataMod11 (Mat-No. 11991) is located on the left side (front panel view) inside the controller housing (RJ45 connector). Settings and notes from chapter 10.3 remain valid.

Wiring diagram for DataMod11

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10.5 ModBus-MBus-Gateway

The connector for the optional ModBus-MBus-Gateway (Mat-No. 11997) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The operation of the controller in conjunction with the ModBus-MBus-Gateway requires a permanent bus connection (data cable).

The ModBus-MBus-Gateway is used to integrate M-Bus meters into building control systems of HVAC system networks. The ModBus-MBus-Gateway allows an easy to handle connection of heat, electricity or water flow meters. Up to 6 meter according to EN 1434-3 can be connected.

Settings and notes from chapter 10.2 remain valid.

Wiring diagram for ModBus-MBus-Gateway

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10.6 USB communication cable USB-L3

The connector for the USB communication line L3 USB (Material No.: 11982) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The operation of the controller in conjunction with the USB communication cable USB-L3 requires the use of appropriate communication tools (software) and installing a device driver to provide a "COM port" in advance.

Wiring diagram for USB communication cable UBS-L3

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Installation and operating manual KT-Elektronik

10.7 Modbus-TCP-Gateway

The connector for the optional ModBus-TCP-Gateway (Mat-No. 11993) is located on the left side (front panel view) inside the controller housing (RJ45 connector). The operation of the controller in conjunction with the ModBus-TCP-Gateway requires the use of appropriate communication tools (software).

The Modbus-TCP-Gateway extends a SOL3-7 to an Ethernet (LAN) interface. All Modbus RTU commands the controller support are available via Modbus TCP.

Wiring diagram for Modbus-TCP-Gateway

10.8 Description of the adjustable communication settings

Station address (ST)

This address is used to identify the controller in bus or modem operating mode. Each address must be assigned only once within a system.

Cyclical initialization (I)

This parameter specifies the time for a cyclical issue of initialization commands "ATZ". The command is not issued when made a call or there is a connection. The initialization "ATZ" causes the modem to copy the profile 0 in the active profile. This assumes that the adjustment of modem parameters and storing the same is done in the modem profile 0 by a suitable terminal program. With CO6 -> F04 - 1 eliminates this type of modem initialization.

Modem dialling pause (P)

A dialling pause (approx 3 to 5 minutes) should be kept within two BCS/SMS provider calls in order not to permanently stress the telecommunication network. The modem dialling pause is programmed as period between two dial attempts.

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Modem time out (T)

If connected to the BCS, but not addressing a Modbus data point, the controller closes the connection after the modem has timed out. If the error status register has not been read out during the connection to the BCS, the controller attempts to reconnect to the BCS after the programmed modem dialling pause (P) to repeat the procedure. The time setting is irrelevant for SMS delivery.

Number of dial attempts (C)

The dial attempts are repeated in compliance with the modem dialling pause as long as the BCS/SMS service centre line is occupied respectively the call initiation has not been reset by the building control system. Unsuccessful connection attempts are indicated by "OFF" at the advanced information level. The dialling attempts counter is automatically reset at 12:00 followed by new attempts.

Resetting the call initiation = reading out the error status register (HR40150)

Phone number of the BCS (TELnr)

The phone number of the building control system, including area code – if needed – has to be entered here. Short dialling breaks can be provided by entering a "P", where each P equals 1 second, the end of the dialling string has to be indicated by entering „–“. The phone number can be up to 22 characters long.

Example phone number „069, 2 seconds break, 4009, 1 second break, 0“:

0 6 9 P P 4 0 0 9 P 0 – (= 11 characters)

10.9 Memory module

The memory module ParaMem (Mat-No. 17090) is especially suitable to transfer all programmed data from one SOL3 controller to several other SOL3 controller. The connector for the memory module is located on the left side (front panel view) inside the controller housing (RJ45 connector). If successfully plugged in, “S3 SP” will be displayed on the screen of the controller. If the memory module already contains data from another SOL3 controller, they can be accessed by turning the rotary pushbutton to "SP S3".

By pressing the rotary pushbutton in "S3 SP" position, the current controller settings are copied to the module.

By pressing the rotary pushbutton in "SP S3" position, the current module data is copied to the controller and the display of "LESE".

The displayed bar graph is used as progress bar during the transfer. "I.O." is displayed to confirm the completion of a successful data transfer. The memory module can now be disconnected by unplugging it.

EB_37388_SOL3-7_EN001 81

Note: By activating the function block CO6 -> F04 - 1, the connected modem is configured automatically.

Installation and operating manual KT-Elektronik

10.10 55Viewer for visualization and remote maintenance.

The software 55Viewer (Mat-No. 37160) is available to visualize and remote maintain the system.

The software allows to display a graphical representation of the complete system installation with all sensor data and all switching states of the pump and valve outlets. Various tabs are available to display all controller settings and data, programmed schedules and heat meter data. 55Viewer also allows to modify controller parameters.

A personal computer with the following minimum requirements is needed:

• PC with a Pentium II processor or equivalent CPU (300 MHz or higher, 500 MHz or more are recommended)

• Serial port respectively an appropriate modem for dial up connections

• SVGA graphics card (min. resolution 800x600)

• CD-ROM drive

• Min 64 MB of RAM (recommended 128 MB)

• Min 150 MB of free hard disk space

• One of Windows 2000, XP, Vista or Windows 7 as OS

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10.11 Data Logging

The data logging module DataMem (Mat-No. 37699) allows saving the following controller data in two minute intervals:

Sensor readings Control signals [%] Switching states of the pump outlets Error status register and archive Access to controller settings

The connector for the memory module is located on the left side (front panel view) inside the controller housing (RJ45 connector).

Once the memory chip of the data logging module is full, approx. after 8 days, the module starts overwriting the oldest data. The current memory capacity can be viewed in the advanced information level, it is the second value displayed (range: 0 to 6035) in menu item "Info 2" (chapter 1.10). After plugging in the data logging module, the value is not displayed before the first scanning cycle is complete.

The saving cycle interval in minutes, range from 1 to 99 minutes, can be programmed after entering the access code 0010. The default factory setting of 2 corresponds to a two minute cycle interval.

The data can be analysed using the PC based software "Data Logging Viewer". The USB converter 3 (Mat-No. 11995) which is shipped with the viewer software is required to connect the logging module to a PC.

A device description file is also required to display the data correctly.

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Installation and operating manual KT-Elektronik

11 Mounting

The device consists of a controller housing containing the electronics assembly and a mounting panel with the terminal strips. It is suited for control panel, wall and DIN rail mounting (Figure 13).

Control panel mounting

1.Loose both screws (1).

2.Separate housing and mounting panel.

3.Cut out a rectangle of 138 by 92 mm (W x H) from the panel.

4.Insert the housing into the cut-out.

5.Use the screws (2) to fix the housing onto the panel.

6.Perform electrical connection according to chapter 12.

7.Remount housing.

8.Tighten both screws (1).

Wall mounting

1.Loose both screws (1).

2.Separate housing and mounting panel.

3.Eventually drill holes at the predefined positions with the given dimensions. Fix

mounting panel with 4 screws.

4.Perform electrical connection according to chapter 12.

5.Remount housing.

6.Tighten both screws (1).

DIN rail mounting

1.Hook the spring-loaded hooks (4) to the bottom of the DIN rail (3).

2.Slightly push up the housing and pull the upper clips over the rail.

3.Loose both screws (1).

4.Separate housing and mounting panel.

5.Perform electrical connection according to chapter 12.

6.Remount housing.

7.Tighten both screws (1).

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Figure 12 - Mounting

EB_37388_SOL3-7_EN001 85

Installation and operating manual KT-Elektronik

12 Electrical connection

ATTENTION!

VDE and utility specifications and regulations have to be attended to when wiring and connecting the controller. Therefore, this task has to be performed by qualified personnel only!

12.1 Notes for wire installation

230 V-supply lines and signal lines must be routed in separate cables! To increase noise resistance, a minimum distance of 10 cm between each cable has to be kept! This spatial separation has to be considered also in control cabinets!

The cables for digital signals (bus lines) and analogue signal lines (sensor lines, analogue outputs) must also be routed in separate cables!

It is recommended to use shielded cables for analogue signal lines in systems with high electromagnetic noise level. The shield is to be single-earthed either at input or output of the cabinet with a large area contact! The central earthing point is to be connected to the protective earth conductor PE with the shortest possible cable (>= 10 mm² in diameter)!

Inductances in the cabinet, like contactor coils, are to be supplied with appropriate snubber circuits (RC snubber)!

High field strength cabinet components like transformers and frequency inverters should be shielded by separating plates with good earthing.

12.2 Surge Protection Measures

Signal lines routed outdoor or over long distances should be surge protected! For bus lines, such measures are essential.

The shielding of signal lines laid outdoor must be conductive and double-earthed. The surge arrester has to be connected to the input of the control cabinet.

12.3 Connecting the controller

The connection is performed according to the following wiring diagram. The housing has to be opened to connect the cables. The housing has marked feedthroughs on the upper or lower side or on the mounting panel that have to be broke through and then supplied with the appropriate grommets respectively screwing.

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12.3.1 Connecting the sensors

Wires with a minimum diameter of 2 by 0.5 mm² may be connected to the terminal strips on the mounting panel.

Connecting the actuators

3-point-/2-point duty outputs: moisture proof cables with a minimum diameter of 1.5 mm² are to be connected to the terminals of the controller output. It is recommended to check the direction of rotation at start-up time.

12.3.2 Connecting the pumps

All wires with a minimum diameter of 1.5 mm² are to be connected to the controller according the wiring diagram. The relay outputs are isolated/potential-free contactors, thus not supplied with power from the controller. Therefore, the terminals 20, 22 and 25 – and eventually 28 have to be connected to L1 (terminal 18).

12.3.3 Legend for connection diagram

VF Flow sensor (heating circuit) CP Collector pump RF Room sensor SP Storage (charging) pump AF Outdoor sensor CUV Collector switching valve CRF Collector return-flow sensor SUV Storage switching valve CVF Collector flow sensor RUV Return flow switching valve SF Storage sensor CTP Collector exchanger pump CF Collector sensor NH Auxiliary heating VST-Imp. Volume flow impulses M+/M- Control signal for heating circuit

mixing valve

ZP Domestic water-

circulation pump

flow 0..10V output for

pump rotation speed

EB_37388_SOL3-7_EN001 87

Note: The motor actuators are not automatically supplied with power from the controller. They can be connected to an external power source via terminal 28. If this is not desired, jumper have to be set from terminal 18 to 28.

Installation and operating manual KT-Elektronik

12.3.4 Wiring diagram

Note: The diagram shown on the back of the controller housing applies to most of the possible system variants. Certain system variant configuration require a different usage of single relay outputs. The following table shows the assignment of functions to terminals for all system variants.

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12.3.5 Terminal assignment for Outputs

System variant

T. 21

T. 23

T. 24

T. 26

T. 27

T. 29

T. 30

I - I.0.0

CP1

I - I.0. I

CP1UPM-

M+

I - I. I.0

CP1

I - I. I. I

CP1NHUPM-M+

I - I.2.0

CP1

I - I.2. I

CP1ZPUPM-M+

I - I.3.0

CP1ZPNH

I - I.3. I

CP1ZPNHUPM-

M+

I - 2.0.0

CP1

SUV

I - 2.0. I

CP1

SUVUPM-

M+

I - 2. I.0

CP1

SUV

I - 2. I. I

CP1NHSUVUPM-

M+

I - 2.2.0

CP1

SUV

I - 2.2. I

CP1ZPSUVUPM-

M+

I – 2.3.0

CP1

SUVZPNH

I – 2.3. I

CP1ZPNH

SUVUPM-

M+

I - 3.0.0

SP1

SP2

I - 3.0. I

SP1

SP2UPM-

M+

I - 3. I.0

SP1

SP2

I - 3. I. I

SP1

SP2UPM-

M+

I - 3.2.0

SP1

SP2

I - 3.2. I

SP1

SP2UPM-

M+

I – 3.3.0

SP1

SP2ZPNH

I – 3.3. I

ZPNHSP1

SP2UPM-

M+

I o I.0.0

CP1

CTP

I o I.0. I

CP1

CTPUPM-

M+

I o I. I.0

CP1

CTP

I o I. I. I

CP1

CTPNHUPM-M+

I o I.2.0

CP1

CTP

I o I.2. I

CP1ZPCTPUPM-

M+

I o I.3.0

CP1

CTPZPNH

I o I.3. I

CP1ZPCTPNHUPM-M+

I o 2.0.0

CP1

CTP

SUV

I o 2.0. I

CP1

CTP

SUVUPM-

M+

I o 2. I.0

CP1

CTP

SUV

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System variant

T. 21

T. 23

T. 24

T. 26

T. 27

T. 29

T. 30

I o 2. I. I

CP1NHCTP

SUVUPM-

M+

I o 2.2.0

CP1

CTP

SUV

I o 2.2. I

CP1ZPCTP

SUVUPM-

M+

I o 2.30

CP1

CTP

SUVZPNH

I o 3.0.0

CP1

SP1

SP2

I o 3.0. I

CP1

SP1

SP2UPM-

M+

I o 3. I.0

CP1

SP1

SP2

I o 3. I. I

CP1NHSP1

SP2UPM-

M+

I o 3.2.0

CP1

SP1

SP2

I o 3.2. I

CP1ZPSP1

SP2UPM-

M+

I o 3.3.0

CP1

SP1

SP2ZPNH

2 - I.0.0

CP1

CUV

2 - I.0. I

CP1

CUVUPM-

M+

2 - I. I.0

CP1

CUV

2 - I. I. I

CP1

CUVNHUPM-M+

2 - I.2.0

CP1

CUV

2 - I.2. I

CP1

CUVZPUPM-M+

2 - I.3.0

CP1

CUVZPNH

2 - I.3. I

CP1

CUVZPNHUPM-

M+

2 - 2.0.0

CP1

CUV

SUV

2 - 2.0. I

CP1

CUV

SUVUPM-

M+

2 - 2. I.0

CP1

CUV

SUV

2 - 2. I. I

CP1

CUVNHSUVUPM-

M+

2 - 2.2.0

CP1

CUV

SUV

2 - 2.2. I

CP1

CUVZPSUVUPM-

M+

2 – 2.3.0

CP1

CUV

SUVZPNH

2 - 3.0.0

CUV

SP1

SP2

2 - 3.0. I

CUV

SP1

SP2UPM-

M+

2 - 3. I.0

CUV

SP1

SP2

2 - 3. I. I

CUV

SP1

SP2UPM-

M+

2 - 3.2.0

CUV

SP1

SP2

2 - 3.2. I

CUV

SP1

SP2UPM-

M+

2 – 3.3.0

CUV

SP1

SP2ZPNH

2 o I.0.0

CP1

CUV

CTP

2 o I.0. I

CP1

CUV

CTPUPM-

M+

2 o I. I.0

CP1

CUV

CTP

2 o I. I. I

CP1

CUV

CTPNHUPM-M+

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System variant

T. 21

T. 23

T. 24

T. 26

T. 27

T. 29

T. 30

2 o I.2.0

CP1

CUV

CTP

2 o I.2. I

CP1

CUV

CTPZPUPM-M+

2 o I.3.0

CP1

CUV

CTPZPNH

2 o 2.0.0

CP1

CUV

CTP

SUV

2 o 2.0. I

CP1

CUV

CTP

SUVUPM-

M+

2 o 2. I.0

CP1

CUV

CTP

SUV

2 o 2.2.0

CP1

CUV

CTP

SUV

2 o 2.3.0

CP1

CUV

CTP

SUVZPNH

2 o 3.0.0

CP1

CUV

SP1

SP2

2 o 3.0. I

CP1

CUV

SP1

SP2UPM-

M+

2 o 3. I.0

CP1

CUV

SP1

SP2

2 o 3.2.0

CP1

CUV

SP1

SP2

2 o 3.3.0

CP1

CUV

SP1

SP2ZPNH

3 - I.0.0

CP1

CP2

3 - I.0. I

CP1

CP2UPM-

M+

3 - I. I.0

CP1

CP2

3 - I. I. I

CP1

CP2NHUPM-M+

3 - I.2.0

CP1

CP2

3 - I.2. I

CP1

CP2ZPUPM-M+

3 - I.3.0

CP1

CP2ZPNH

3 - I.3. I

CP1

CP2ZPNHUPM-

M+

3 - 2.0.0

CP1

CP2

SUV

3 - 2.0. I

CP1

CP2

SUVUPM-

M+

3 - 2. I.0

CP1

CP2

SUV

3 - 2. I. I

CP1

CP2NHSUVUPM-

M+

3 - 2.2.0

CP1

CP2

SUV

3 - 2.2. I

CP1

CP2ZPSUVUPM-

M+

3 – 2.3.0

CP1

CP2

SUVZPNH

3 o I.0.0

CP1

CP2

CTP

3 o I.0. I

CP1

CP2

CTPUPM-

M+

3 o I. I.0

CP1

CP2

CTP

3 o I. I. I

CP1

CP2

CTPNHUPM-M+

3 o I.2.0

CP1

CP2

CTP

3 o I.2. I

CP1

CP2

CTPZPUPM-M+

3 o I.3.0

CP1

CP2

CTPZPNH

3 o 2.0.0

CP1

CP2

CTP

SUV

3 o 2.0. I

CP1

CP2

CTP

SUVUPM-

M+

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System variant

T. 21

T. 23

T. 24

T. 26

T. 27

T. 29

T. 30

3 o 2. I.0

CP1

CP2

CTP

SUV

3 o 2.2.0

CP1

CP2

CTP

SUV

3 o 2.3.0

CP1

CP2

CTP

SUVZPNH

3 o 3.0.0

CP1

CP2

SP1

SP2

3 o 3.0. I

CP1

CP2

SP1

SP2UPM-

M+

3 o 3. I.0

CP1

CP2

SP1

SP2

3 o 3.2.0

CP1

CP2

SP1

SP2

3 o 3.3.0

CP1

CP2

SP1

SP2ZPNH

12.3.6 Terminal assignment for inputs

The assignments shown in the wiring diagram on page 88 applies to all system variants. Not required sensors don't need to be connected.

Inputs that are not required by the particular system variant may be connected, and information may be displayed at extended information level (chapter 1.10). This allows displaying temperature data of other sensors for information purposes, like flow and return flow temperature of an attached wood-fired boiler and other.

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13 Appendix

13.1 Function block lists

CO1: Heating circuit Rk1

F Function FS Function block parameter description/value range (factory default

setting) 01 Room sensor RF 0 CO1 -> F01 - 1: Temperature display active 02 Outdoor sensor AF0 CO1 -> F02 - 1: active weather-compensated control

05 Underfloor

heating Screed drying

0 CO1 -> F05 - 1: limiting the setting ranges

Function block parameters:

Temperature increase / 1 to 10 °C/24 h (5 °C/24 h)

Maximum temperature / 25 to 60 °C (45 °C)

Maximum temperature holding time / 1 to 10 days (4 days)

Temperature decrease / 0 to 10 °C/ 24 h (0 °C/24 h)

START 07 Optimization 0 CO1 -> F07 - 1: only with

• CO1 -> F01 - 1

• CO1 -> F02 - 1

08 Adaptation 0 CO1 -> F08 - 1: only with

• CO1 -> F01 - 1

• CO1 -> F02 - 1

• CO1 -> F11 - 0

09 Short-term

adaptation

0 CO1 -> F09 - 1 only with CO1 -> F01 - 1

Function block parameters:

Cycle duration / 0 respectively 1 to 100 min (20 min)

Boost KP / 0 to 25 (0) 11 4-point

characteristic

0 CO1 -> F11 - 1: 4-point characteristic, only with CO1 -> F08 - 0

CO1 -> F11 - 0: Gradient characteristic diagram 12 Control mode

3-Pkt

1 CO1 -> F12 - 1: 3-point control

Function block parameters:

KP (boost) / 0.1 to 50.0 (2.0)

TN (reset time) / 1 to 999 s (120 s)

TV (retention time) / 0 s

TY (valve transit time) / 5, 10, 15, …, 240 s (45 s)

CO1 -> F12 - 0: 2-point control

Function block parameters:

Differential gap / 1 to 30 °C (5 °C)

minimum running time / 0 to 10 min (2 min)

minimum idle time / 0 to 10 min (2 min) 13 Limiting deviation

for OPEN signal

0 CO1 -> F13 - 1 only with CO1 -> F12 - 1

Function block parameters:

maximum deviation / 2 to 10 °C (2 °C)

F Function block number, FS Factory default setting

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CO3: Solar circuit

F Function FS Function block parameter description/value range (factory default

setting) 01 Forced pump

operation

0 CO3 F01 = 1 - Regular forced pump operation active

see section 5.10

02 Collector

antifreeze

0 CO3 F02 = 1 - Antifreeze active

see section 5.11 03 Start up function

(tube collector function)

0 CO3 F03 = 1 - Start-up function active

see section 5.9

04 Rotation speed

control

CO3 F04 = 1 Rotation speed control active

see section5.6 05 Solar heat meter 0 CO3 F05 = 1 - Collector performance heat meter

see section 5.5

Function block parameter:

Heat capacity at 25°C, Heat capacity at 100°C 06 Heat meter-

impulse source

0 see section 5.5

CO3 F06 = 1 - Volume flow rate sensor active

Function block parameter: Impulse value

CO3 F06 = 0 - Volume flow rate replacement value active

Function block parameter: Volume flow rate replacement value 07 CVF CO3 F07 = 1 - Collector flow sensor active

see section 5.3 08 CRF CO3 F08 = 1 - Collector return flow sensor active

see section 5.3 09 CVF for CTP 0 CO3 F09 = 1 -Collector flow sensor CVF for exchanger pump

CTP active

see section 5.12

10 Temperature dif-

ference controller

0 10K

2 7

CO3 F10 = 1 Temperatur difference controller active

Function block parameter

Temperatur difference set point / -30 to 160°C

Reference input / Terminal number 1...9

Controlled input / Terminal number 1...9

F Function block number, FS Factory default setting

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CO4: Domestic water circuit

F Function FS Function block parameter description/value range (factory default

setting)

14 Thermal

disinfection

0 CO4 -> F14 - 1 only with CO4 -> F01 - 1

Function block parameters: Day of week / 1, 2, …, 7, 1–7 (3) Start time / 00:00 to 23:45 (00:00), Stop time / 00:00 to 23:45 (04:00) Disinfection temperature / 60 to 90 °C (70 °C) Boost of set-point / 0 to 50 °C (10 °C)

with start time = stop time Choice: bE / 1, 0 (1)

F Function block number, FS Factory default setting

CO5: system wide functions (all system variants)

If the controller signalizes CO5 -> F00 - 1, any access to return flow, volume flow rate and power settings is locked.

F Function FSFunction block parameter description/value range

(factory default setting) 01 02 03

Sensor initialization 1 Pt 1000

04 Summer operating mode

(OM)

0 CO5 -> F04 - 1: Activation of time-dependent summer

operating mode;

Function block parameters:

Beginning of summer period /01.01 to 31.12 (01.06)

Number of days needed for activation / 1 to 3 (2)

End of summer period / 01.01 to 31.12 (30.09)

Number of days needed for deactivation / 1 to 3 (1)

Outside temperature threshold /0 to 30 °C (18 °C) 05 Delayed outside temperature

compensation at dropping temperatures

06 Delayed outside temperature

compensation at increasing temperatures

CO5 -> F05, 06 - 1: Function block parameter:

Delay / 1 to 6 °C/h (3 °C/h)

08 Summertime-/ Wintertime-

switching

09 Antifreeze program II 10CO5 -> F09 - 0: Antifreeze program I (reduced anti-

freezing) Function block parameter:

Anti-freezing threshold / –15 to 3 °C (3 °C)

CO5 -> F09 - 1: Antifreeze program, Function block

parameter:

Anti-freezing threshold / –15 to 3 °C (3 °C) 19 Temperature monitoring 0 CO5 -> F19 - 1: Temperature monitoring active

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F Function FSFunction block parameter description/value range

(factory default setting) 20 Sensor calibration 1 CO5 -> F20 - 1: Setting all sensor calibration values

CO5 -> F20 - 0: Deleting sensor calibration values 21 Locking manual operating

mode

0 CO5 -> F21 - 1: In manual operating mode switch

position automatic operating mode is driven 22 Locking the rotary switches 0 CO5 -> F22 - 1: Rotary switch has no functionality

F Function block number, FS Factory default setting

CO6: Modbus

F Function FS Function block parameter description/value range (factory

default setting) 01 Modbus 1 CO6 -> F01 - 1: Modbus active 02 Modbus-16-bit

addressing

0 only with CO6 -> F01 – 1

CO6 -> F02 - 1: 16-bit addressing,

CO6 -> F02 - 0: 8-bit addressing 03 Modem function 0 CO6 -> F03 - 1 only with • CO6 -> F01 - 1

CO6 -> F08 - 1 04 automatic

Modem configuration

0 CO6 -> F04 - 1 only with • CO6 -> F03 - 1

CO6 -> F08 - 1

05 Blocking the

BCS dial up

0 CO6 -> F05 - 1: no dial up on failure,

only with CO6 -> F03 - 1 06 BCS dial up

on corrected failures

0 CO6 -> F06 - 1: additional dial up on corrected failures, only

with CO6 -> F03 - 1

07 Control system

monitoring

CO6 -> F07 - 1: Reset all collective level bits to "autonomous"

on missing connection,

only with CO6 -> F01 – 1 08 SMS CO6 -> F08 - 1: SMS delivery active

F Function block number, FS Factory default setting

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13.2 Parameter list

PA1: Parameter level Rk1

No Symbol Description Range factory

default

PA1.01

Gradient, flow with CO1 -> F05 - 1 :

0,2 to 3,2 0,2 to 1,0

0,4 1,0

PA1.02

Level, flow –30 to 30 °C 0 °C

PA1.03

4-point characteristic characteristic

1...4

Outdoor temperature –40 to 50 °C

-15,-5,5,15°C

1...4

Flow temperature (Day operation mode) 5 to 130 °C

70,55,40,25°C

1...4

Reduced flow temperature (Night OM) 5 to 130 °C

60,40,20,20°C

PA1.06

Minimum flow temperature 5 to 130 °C 20 °C

PA1.07

Maximum flow temperature with CO1-> F05 - 1 :

5 to 130 °C 5 to 50 °C

50 °C 50 °C

PA1.08

Outdoor temperature deactivation temperature for daytime operating mode

0 to 50 °C 22 °C

PA1.09

Outdoor temperature deactivation temperature for night-time operating mode

–20 to 50 °C 15 °C

PA1.10

Outdoor temperature activation temperature for daytime operating mode

–20 to 5 °C –15 °C

PA1.11

Room temperature set-point daytime operation mode

0 to 40 °C 20,0 °C

PA1.12

Room temperature set-point night-time operation mode

0 to 40 °C 15,0 °C

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PA3: Solar circuit parameter level

No Symbol Description Range factory

default

PA3.01

Minimum run time 0 to 1800 s 60s

PA3.02

Minimum idle time 0 to 1800 s 180s

PA3.03

maximum storage tank temperature 1 (turn-off condition)

50 to 160 °C 60°C

PA3.04

maximum storage tank temperature 1 (turn-on condition)

50 to 160 °C 58°C

PA3.05

maximum storage tank temperature 2 (turn-off condition)

50 to 160 °C 60°C

PA3.06

maximum storage tank temperature 2 (turn-on condition)

50 to 160 °C 58°C

PA3.07

Type of storage tank priority 1 to 5 3

PA3.08

Minimum storage tank temperature for charging valid only with storage tank priority 2

5 to 90°C 30°C

PA3.09

Charging time for low priority storage tank valid only with storage tank priority 3

0 to 120 min 15 min

PA3.10

Collector maximum temperature (turn-off condition)

90 to 160°C 130°C

PA3.11

Collector maximum temperature (turn-off condition)

90 to 160°C 110°C

PA3.12

Collector minimum temperature (turn-off condition)

-20 to 50°C 30°C

PA3.13

Collector minimum temperature (turn-off condition)

-20 to 50°C 35°C

PA3.14

Array minimum running time 0 to 1800 s 60s

PA3.15

Turn-on delay CTP 0 to 250 s 120 s

PA3.16

Post-run time CTP 0 to 250 s 10 s

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PA4: Storage temperature, auxiliary heating

No Symbol Description Range factory

default

PA4.01

Set-point domestic water Daytime Operation

5 to 90 °C 45 °C

PA4.02

Set-point domestic water Night-time operation

5 to 90 °C 10 °C

PA4.03

Differential gap 0 to 30 °C 5 °C

PA4.04

Temperature difference to delay auxilary heating when collector pump is active

0 to 20 °C 0 °C

PA5: system wide functions (all system variants)

No Symbol Description Range factory

default

PA5.01

Holidays (chapter 1.8) 01.01 to 31.12

PA5.02

Vacation times (chapter 1.9) 01.01 to 31.12

PA6: Modbus parameter

No Symbol Description Range PA6.01

Station address (8 bit) with CO6.F02 - 0 1 to 247

PA6.02

Station address (16 bit) with CO6.F02 - 1 1 to 32000

PA6.03

Modem cyclic initialisation (I) 0 to 255 min

PA6.04

Modem dialling pause (P) 0 to 255 min

PA6.05

Modem time out (T) 1 to 255 min

PA6.06

Number of dial attempts 1 to 255

PA6.07

Phone number of the BCS (TELnr) max. 22 characters

1, 2, 3, …, 9, 0;

„-“ = End of string

„P“ = Pause

PA6.08

SMS service numbers (TAPnr)

PA6.09

Cell phone number (Handi)

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Installation and operating manual KT-Elektronik

13.3 Resistance values

Resistance values with Pt 1000-measuring element

Outdoor temperature sensor type 5227-2 for flow, return flow and storage temperature Typ2 5277-2 (immersion sleeve required) and 5267-2 (contact sensor). Room temperature sensor type 5257-1, type 5257-5 (room control unit).

Temperature Resistance value

with Pt1000 sensor

-40 °C

842.7 Ω

-30 °C

882.0 Ω

-20 °C

921.6 Ω

-10 °C

960.9 Ω

0 °C

1000.0 Ω

10 °C

1039.0 Ω

20 °C

1077.9 Ω

30 ° C

1116.7 Ω

40 °C

1155.4 Ω

50 °C

1194.0 Ω

60 °C

1232.4 Ω

70 °C

1270.7 Ω

80 °C

1308.9 Ω

90 °C

1347.0 Ω

100 °C

1385.0 Ω

110 °C

1422.9 Ω

120 °C

1441.7 Ω

130 °C

1499.4 Ω

140 °C

1535.8 Ω

150 °C

1573.1 Ω

160 °C

1610.4 Ω

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KT-Elektronik SOL3-7 Installation And Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Operation

1.1 Controls

1.1.1 Rotary switch

1.1.2 Rotary pushbutton

1.2 Operating

1.3 Display

1.3.1 System scheme

1.3.2 Operating Mode

1.4 Retrieving data – Information level

1.5 Setting the system time

1.6 Adjust usage schedule settings

1.7 Setting the party mode (heating circuit/auxiliary heating)

1.8 Setting holidays

1.9 Setting vacation times

1.10 Access advanced information level

1.11 Trend show – Data logging

2 Commissioning

2.1 Set language

2.2 Setting the system variant ID

2.3 Activate and deactivate functions

2.4 Edit settings

2.5 Sensor calibration

2.6 Reset to factory default settings

3 Manual operating mode

4 System variants

4.1 Extending the basic system variant representations

5 Solar circuit functions

5.1 Basic Control function

5.2 Storage

5.3 Swimming pool

5.4 Collector return flow sensor, Collector flow sensor

5.5 Measurement of solar power and solar energy

5.6 Rotation speed control

5.7 Collector overheating protection

5.8 Collector minimum temperature

5.9 Start up function

5.10 Forced pump operation (blocking protection)

5.11 Collector Antifreeze

5.12 Two collector arrays

5.13 External heat exchanger

5.14 Auxiliary heating with secondary heat generator

6 Heating circuit functions

6.1 Prescribing the room temperature set-points

6.2 Weather-compensated control

6.2.1 Gradient characteristic

6.2.2 4-point characteristic

6.3 3-point control

6.4 Two-point control

6.5 Underfloor heating/screed drying

6.6 Deactivation depending on the outdoor temperature

6.6.1 OT deactivation temperature for daytime operating mode

6.6.2 OT deactivation temperature for night-time operating mode

6.6.3 OT activation temperature for daytime operating mode

6.6.4 Summer operating mode (OM)

6.7 Delayed outside temperature compensation

6.8 Remote operation

6.9 Optimization

6.10 Raise return flow of external heating system

6.10.1 Main principle

6.10.2 Implementation

7 Domestic water circuit functions

7.1 Domestic water heating in storage tank

7.2 Thermal Disinfection of the storage tank

8 System wide functions - all system variants

8.1 Automatic summer/winter switching

8.2 Antifreeze

8.3 Locking manual operating mode

8.4 Locking the rotary switch

8.5 Enter a valid individual access code

8.6 Temperature difference controller

9 Malfunction

9.1 Error list

9.2 Sensor failure

9.3 Temperature monitoring

9.4 Error status register

9.5 SMS delivery in case of a system failure