SUNSET STELLA Solar controller Operating manual

Operating manual

Solar controller STELLA

Microcontroller-controlled temperature difference controller for solar thermal systems

Operating manual for STELLA 1316BED084-20B, last revised 03/2010

Explanation of icons

Warning!

Icon indicates possibility of hazard or error

Warning: 230 V AC current!

Icon indicates danger from highvoltage, life-threatening current.

List

Please note!

Operational advice / special information

User action / procedure

Inspection / check

Contents

1 Application area/device features

1.1 Application area

1.2 Device features

2 Safety instructions

3 Mounting the device

3.1 Opening the device

3.2 Wall mounting

3.3 Connections

3.4 Temperature sensor connection

4 Short descriptions and device operation

4.1 Display layout

4.2 Operation

5 Menu structure

5.1 "Info" menu

5.2 "Programming" menu

5.3 "Manual Operation" menu

5.4 "Basic Setup" menu

6 System diagrams

7 Controller functions

7.1 General controller functions

7.1.1 Dual storage tank systems

7.1.2 RPM control

7.1.3 Independent controller

7.1.4 Tube collector or start function

7.2 Protective functions

7.2.1 Collector protection

7.2.2 Recooling (holiday function)

7.2.3 System protection

7.2.4 Anti-freeze protection

7.3 Additional function

7.3.1 Energy yield measurement

8 System monitoring

8.1 Sensor monitoring

8.2 Flow monitoring

9 Troubleshooting

9.1 Faults with error messages

9.2 Faults without error messages

10 Specifications

11 PT1000 resistance table

12 Guarantee terms and conditions

13 Declaration of conformity

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25

25

3

3

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3

4

4

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8

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10

6

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5

6

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16

2

1 Application area/device features

1.1 Application area

STELLA controllers are high-performance microprocessor-controlled units for controlling the functions of solar thermal systems. STELLA perfectly controls solar power systems equipped with up to two collector arrays or two storage tanks and can be used for numerous system types. The controllers are designed for use in dry areas and for residential, business and commercial applications. If you want to use the unit for other purposes, check applicable statutory regulations before use.

1.2 Device features

STELLA is equipped with the following features:

■

■

■

■

■

■

■

Intuitive user menus with icons and four control buttons

Illuminated display

Adjustable control values

RPM control or switching control for the solar circuit pump

Start function for systems with tube collectors

Integrated operating hours counter for storage tank charging

Extensive functions for system monitoring, using symbols to indicate errors and faults

■

■

■

■

■

■

■

Integrated energy yield measurement (optional, only in conjunction with yield measurement set)

Storage of all values, even during prolonged mains power supply outage

Various protective functions, including system and collector protection, recooling and anti-freeze protection

Individually operated independent controller with three time frames

■

■

■

Generous wiring space

Real-time clock function

Available accessories:

PT1000 temperature sensor

Yield measurement set (incl. tube sensor)

Sensor connection box

Immersion sleeves

2 Safety instructions

■

■

■

Always ensure that you isolate the device from the mains power supply before starting installation or wiring work on its electrical components. Make sure that you never confuse the SELV (safety extra low voltage) connectors (sensor, flow transmitter) with the 230 V connectors: this will destroy the device. Lifethreatening voltages may be present in both the device and the connected sensors.

Solar power systems can generate high temperatures. There is therefore a risk of burn injuries! Exercise caution when installing the temperature sensors!

Mount STELLA in a location where it will not be subjected to excessive operating temperatures (>50 °C) by any external heat sources. For safety reasons, the system should only be operated manually during testing. In this operating mode, the system does not monitor maximum temperatures or sensor functions. Do not operate the system if there is recognisable damage to the controller, cables or the connected pumps and valves.

You must isolate the control unit from mains power before carrying out any assembly or wiring work.

The connection and start-up of the control unit should only be carried out by qualified technical personnel. All work must comply with the applicable safety regulations.

3

4

Only install the control unit in dry interiors not subject to a risk of explosions.

Do not install the unit onto flammable surfaces

■

The installation and start-up of the control unit should only be carried out by qualified technical personnel. All work must comply with the applicable national and local safety regulations (e.g. in Germany VDE 0100).

3 Mounting the device

3.1 Opening the device

Before opening the device, disconnect mains power and ensure that it cannot be switched back on! The upper part of the housing is locked to the lower part using two latches. Release the housing cover by pulling the sides outwards (see picture) to unlatch it, and then pivot the cover upwards until it "clicks" open.

Before switching on or starting up the system:

Ensure the cover is closed – it must snap securely into place on both sides!

3.2 Wall mounting

The device is mounted on the points marked. A drilling template is provided with a device. Insert the "Quick Info" card provided with the device into the corresponding pocket on the back of the device. The "Quick Info" card rapidly familiarises users with the device.

3.3 Connections

Bear in mind the following points concerning the 230 V connections:

■

If the controller is wired directly into the mains, it must be possible to isolate mains power by using a switch external to the controller. The switch is not required if the main power supply is provided via a cable and earthed mains plug.

■

The controllers are designed for use with 230 V/50 Hz mains power. Any pumps and valves to be connected must also be rated for use at this voltage!

■

All earth leads must be attached to the terminals marked "PE".

■

The neutral lead terminals (N) are connected electrically and are not switched!

■

All switching outputs (A1/A2/A3) are electronic 230 V AC N/O contacts. If you need potential-free contacts, then suitable accessory parts are available

3.4 Temperature sensor connection

The STELLA devices use PT1000 precision platinum temperature sensors.

Depending on the system type and functional scope, 2 to 6 sensors will be required.

Mounting / wiring the temperature sensors:

■

Mount the sensors on the collector and storage tank. Ensure proper heat transfer, using heat-conductive paste if necessary.

■

Cross-sections for cable extensions (shielded):

– Up to 15 m, 2 x 0.5 mm 2

– Up to 50 m, 2 x 0.75 mm

2

The shield is connected to earth (PE).

■

Temperature sensors are connected according to the system diagram. You do not need to observe polarity for the two wires when cabling temperature sensors.

■

Sensor cables must be laid separately from 230 V wires.

■

Sensor collection boxes equipped with surge protection should be used for collector sensors and cable extensions.

4 Short descriptions and device operation

4.1 Display layout

During actual operation, only a selection of these symbols will be shown – depending on the current menu.

◂

Currently active menu

◂

Current display assignment

◂

Current readings, times or controller states: here 59.6 °C

◂

Measuring point

◂

Controller state/messages

Display symbols

All possible display symbols are shown below.

dTmin max start stop

F

% ok?

5

6

pressed.

The display illuminates when any button is

4.2 Operation

The STELLA can be operated simply and easily by using the four control buttons.

You can use the control buttons to:

■

Access display values

■

Make changes to unit settings

The icons on the display let you navigate easily through the various control functions.

The control buttons have the following functions:

Control buttons

Function

"Up"

„+“

"Scroll left"

"Exit"

"Cancel"

"Access"

"Down"

„-“

"Scroll right"

"Select"

"Confirm"

Description

■

Go to menu item above

Value modification: increments displayed value by 1; if the button is pressed and held, the value increments continuously

■

■

■

■

Scroll left in main menu

Exit a menu

Exit a menu item

Cancel a value change without saving it

■

■

Access a main menu, go to menu item below

Value modification: decrements displayed value by 1; if the button is pressed and held, the value decrements continuously

■

■

■

Scroll right in main menu

Select a menu item

Confirm a value change and save it

The number of values displayed depends on the additional functions activated.

Display e.g.

75 °C min

12 °C max

105 °C

52 °C min

40 °C max

67 °C

60 °C

5 Menu structure

5.1 "Info" menu

The Info menu shows the following readings and yield values:

60 °C

Meaning

Can be reset

No Displays current collector temperature (1/2)

Displays minimum collector temperature (1/2).

Can be reset to current temperature.

Displays maximum collector temperature (1/2).

Can be reset to current temperature.

Yes

Yes

Displays current storage tank temperature (1/2) No

Displays minimum storage tank temperature

(1/2). Can be reset to current temperature.

Displays maximum storage tank temperature

(1/2). Can be reset to current temperature.

Yes

Yes

Displays current collector return temperature

Heat source sensor for heating, cooling, temperature difference controller – configurable for T1 – T6”

No

No

Display e.g.

35 °C

25 °C

1234 h

927 kWh

Meaning

Heat consumer for temperature difference controller

Antifreeze protection sensor (configurable for T1 - T6). Display of general temperature measuring point (T6) (only shown if connected)

Operating hours for charging storage tank

Can be reset to 0 h

Energy yield for storage tank

Can be reset to 0 kWh

Can be reset

No

No

Yes

Yes

5.2 "Programming" menu

The Programming menu is used to display operating parameters and to change these as required. The preset values generally ensure fault-free system operation.

Display e.g.

max

75 °C dT max

7 K dT min

3 K min

30

13:21 min

40 °C dT

10 K max

65 °C min

15 °C dT max

7 K dT min

3 K

12

Meaning

Storage tank 1/2:

Maximum permissible temperature

Storage tank 1/2: Switchon difference

Storage tank 1/2: Switchoff difference

Set minimum pump capacity using RPM control: 100% = RPM control off

Time of day

Switch-on temperature for heating/cooling functions

Hysteresis for heating/ cooling functions

Difference controller:

Maximum temperature for heat consumer Tmax

Temperature difference controller: Minimum temperature for heat source Tmin

Temperature difference controller:

Hysteresis dTmax

Temperature difference controller:

Hysteresis dTmin

Value range

3 – 40K

2 – 35K

30% – 100% 30%

0:00 – 23:59 12:00

20 – 90 °C 40 °C

1 – 30K

15 – 95 °C 65 °C

0 – 95 °C

3 – 40K

2 – 35K

Typical setting

15 – 95 °C 75 °C

7K

3K

10K

15 °C

7K

3K

Current setting

The number of values displayed depends on the additional functions activated.

7

8

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

Display e.g.

min

0:00

1(2,3) max

23:59

1(2,3) min

6:00

4 max

20:00

4

Meaning

Value range

Typical setting

Time frame 1(2,3): Start 0:00 – 23:59 0:00

Time frame 1(2,3): Stop 0:00 – 23:59 23:59

Current setting

Time frame 4: Start for tube collector function

Time frame 4: Stop for tube collector function

0:00 – 23:59 6:00

0:00 – 23:59 20:00

5.3 "Manual Operation" menu

Automatic operation is switched off during manual operation. Outputs can be manually switched on and off for servicing and test purposes.

Automatic operation is reactivated after exiting the menu or after 8 hours have passed.

Display

3

Meaning Value range

Manual switching on/off of switched output A1 (Pump 1)

Manual switching on/off of switched output A2 (Pump 2/Valve 1)

Manual switching on/off of switched output A3 (cooling, thermostat or temperature difference controller function)

0 = Off

1 = On

0 = Off

1 = On

0 = Off

1 = On

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

5.4 "Basic Setup" menu

The Basic Setup menu displays the hydraulic diagrams and additional functions.

Settings must only be changed by a specialist technician. Settings may only be adjusted in the menu: a) within one minute of the device being switched on; or b) by simultaneously pressing the buttons:

Display

Line Value

0 0

Meaning

Collector protection function

Current setting

1

2

3

4

5

0

0

0

temperature

Recooling function (only if collector protection is on)

Tube collector function, timecontrolled

Energy yield measurement

0 = Off

1 = On

1 = On

110 – 150 °C 130 °C

0 = Off

1 = On

1 = On

65 °C 30 – 90 °C

0 = Off

1 = On

0 = Off

1 = On

0 = Off

0 = Off

Display

Line Value

6 0

7

8

9

10

11

12

13

14

15

16

50

1,0

240

1

0

6

3

0

5

0

Meaning

Energy yield measurement

Set glycol type

Energy yield measurement

Glycol proportion

Energy yield measurement flow transmitter: Litres/pulse

0 – 10

0 – 100%

5% increments

0,5 – 25 l/pulse

0.5 l increments

Multiple storage tank systems

Controller response time in s

30 – 480

Primary storage tank selection 1 – 2

0

50

1,0

240

1

0

Anti-freeze protection function

Reference sensor selection

Anti-freeze protection function

Start temperature

1 – 6 6

-20 °C – +7 °C 3

Independent controller function

0 = Off

1 = Cooling

2 = Heating

3 = Temp. difference controller

0

Independent controller

Reference sensor

System diagram

1 – 6

0 – 4

5

0

Current setting

Energy yield measurement (glycol type selection)

2

3

0

1

4

5

Anro

Ilexan E, Glythermin

Antifrogen L

Antifrogen N

Ilexan E

Ilexan P

8

9

6

7

10

Tyfocor L5.5

Dowcal 10

Dowcal 20

Dowcal N

Tyfocor LS

9

The following layout schematics do not represent complete hydraulic system diagrams.

6 System diagrams

Diagram 0: 1 collector, 1 storage tank

Default diagram: Temperature differential controller preset for increasing return flow

S1

A1

S5

S2

A3

S6

10

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life. The pump manufacturer’s instructions and safety advice must also be followed.

S3

S4

S5

S6

S7

230 V connections

L Mains phase

N

A1

Neutral conductor – mains and outputs

Solar circuit pump (switched output 1)

A2

A3

No function

Switched output 3 - three-way valve for increasing return flow

Sensor connections

S1 Collector sensor

S2 Lower storage tank

No function

Optional: Collector return

Heat source - temp. differential controller for the increased return flow

Heat target - temp. differential controller for the increased return flow

Optional: Flow meter

Diagram 0: 1 collector, 1 storage tank

Alternative diagram - variation with transfer between storage tanks

S1

1 2

A1

S5

S2

A3

S6

The following layout schematics do not represent complete hydraulic system diagrams.

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

230 V connections

L

N

A1

A2

Mains phase

Neutral conductor – mains and outputs

Solar circuit pump (switched output 1)

No function

A3 Switched output 3 - pump for transfer between storage tanks

Sensor connections

S1

S2

Collector sensor

Lower storage tank

S3 No function

S4 Option: Collector return

S5

S6

Heat source - temp. differential controller for the transfer between storage tanks

Heat target - temp. differential controller for the transfer between storage tanks

WMM Optional: Flow meter

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life. The pump manufacturer’s instructions and safety advice must also be followed.

11

Note on the installation

of the three-way valve:

The following layout schematics do not represent complete hydraulic system diagrams.

Diagram 1: 1 collector, 2 storage tanks, pump-valve

S1

1

A1

S5

S2

2

A2

S3

12

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life. The pump manufacturer’s instructions and safety advice must also be followed.

S5

S6

S7

S1

S2

S3

S4

230 V connections

L

N

A1

A2

Mains phase

Neutral conductor – mains and outputs

Solar circuit pump (switched output 1)

Valve (switched output 2)

A3 Independent controller (switched output 3)

Sensor connections

Collector sensor

Lower storage tank 1

Lower storage tank 2

Collector return

Optional: Cooling or heating, or temp. difference controller

Optional: Independent controller, or temperature display

Optional: Flow meter

Diagram 2: 1 collector, 2 storage tanks, 2 pumps

S1

1

S5

S2

A1

2

S3

A2

Alternativschema:

S1

1

S3

S2

A1 A2

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

S5

S6

S7

S1

S2

S3

S4

230 V connections

L

N

A1

A2

Mains phase

Neutral conductor – mains and outputs

Solar circuit pump (switched output 1)

Pump (switched output 2)

A3 Independent controller (switched output 3)

Sensor connections

Collector 1

Lower storage tank 1

Lower storage tank 2

Collector return

Optional: Cooling or heating, or temp. difference controller

Optional: Independent controller, or temperature display

Optional: Flow meter

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life. The pump manufacturer’s instructions and safety advice must also be followed.

13

Type 3: Two collectors, one storage tank with a three-way valve:

■

A2 = Off:

The valve must make a connection between collector 1 and the storage tank.

Note on the installation

of the three-way valve:

The following layout schematics do not represent complete hydraulic system diagrams.

Diagram 3: 2 collectors, 1 storage tank, pump-valve

A2

A1

S1 S3

S5

S2

14

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life. The pump manufacturer’s instructions and safety advice must also be followed.

S5

S6

S7

S1

S2

S3

S4

230 V connections

L

N

A1

A2

Mains phase

Neutral conductor – mains and outputs

Solar circuit pump 1 (switched output 1)

Valve (switched output 2)

A3 Independent controller (switched output 3)

Sensor connections

Collector 1

Lower storage tank

Collector 2

Collector return

Optional: Cooling or heating, or temp. difference controller

Optional: Independent controller, or temperature display

Optional: Flow meter

Diagram 4: 2 collectors, 1 storage tank, 2 pumps

S1 S3

S5

S2

A1 A2

PE - PE A3 A2 A1 L1

FUSE

S1 S2 S3 S4 S5 S6 S7

M M M M M M M

PE - PE N N N N

S2

S3

S4

S5

S6

S7

230 V connections

L Mains phase

N

A1

Neutral conductor – mains and outputs

Solar circuit pump 1 (switched output 1)

A2

A3

Solar circuit pump 2 (switched output 2)

Independent controller (switched output 3)

Fühleranschlüsse

S1 Collector 1

Lower storage tank

Collector 2

Optional: Collector return

Optional: Cooling or heating, or temp. difference controller

Optional: Independent controller, or temperature display

Optional: Flow meter

Operational safety for the controller/system is only guaranteed if these are used for the intended purpose and if no wiring errors have been made.

Failure to follow the connection diagrams and safety instructions can endanger the pump/system and human life.

The pump manufacturer’s instructions and safety advice must also be followed.

15

16

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

7 Controller functions

7.1 General controller functions

The controller compares the temperatures of the various measuring points and charges the storage tank optimally. If the collector temperature exceeds the storage tank temperature, the solar circuit pump is switched on. Monitoring and protective functions ensure safe system operation.

7.1.1 Dual storage tank systems

Examples of dual storage tank systems include:

■

■

■

Two separate storage tanks

One stratified storage tank

One storage tank and a swimming pool, etc.

The controller detects the temperature changes in the collector and the storage media and handles primary and secondary charging. In doing so, it naturally takes the charging duration into account, the interruption of this function and a waiting period for monitoring the collector temperature.

"Basic Setup" menu

Display Meaning

Line Value

11

12

240

1

Controller response time in s

Primary storage tank selection

Value range Factory setting

30 – 480

1 – 2

240

1

7.1.2 RPM control

The A1 and A2 outputs can be operated using RPM control.

"Programming" menu

Display Meaning Value range Typical setting min

30

12

Set minimum pump capacity using RPM control

100% = RPM control off

30% – 100% 30%

7.1.3 Independent controller

This function is set to output 3 and can be configured for the following functionality.

■

■

■

Cooling

Heating

Difference regulator

The temperature sensor for the temperature source can be selected as desired.

Cooling

If the temperature measured exceeds the target value, then output A3 is activated until the temperature measured drops below the target value hysteresis.

"Basic Setup" menu

Display

Line Value

Meaning Value range Factory setting

14

15

1

5

Variable selection: cooling function, thermostat function or temperature difference controller function

Selects the sensor for the independent controller (source)

0 = Off

1 = Cooling

2 = Heating

3 = Temperature difference controller

1 – 6

3

5

"Programming" menu

Display max 40 °C dT 10 K min 00:00:00

1(2,3) max 23:59:00

1(2,3)

Meaning Value range

Switch-on temperature for cooling function

20 – 90 °C

Hysteresis for cooling function 1 – 30K

Time frame 1(2,3):

Start

Time frame 1(2,3):

Stop

0:00 – 23:59

0:00 – 23:59

Typical setting

40 °C

10K

0:00

23:59

Heating

If the temperature measured drops below the target value, then output A3 is activated until the temperature measured reaches the target value + hysteresis.

"Basic Setup" menu

Display

Line Value

14

15

2

5

Meaning

Variable selection: cooling function, thermostat function or temperature difference controller function

Selects the sensor for the independent controller (source)

Value range Factory setting

0 = Off

1 = Cooling

2 = Heating

3 = Temperature difference controller

3

1 – 6 5

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

17

18

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

"Programming" menu

Display Meaning min 40 °C dT 10 K min 00:00:00

1(2,3) max 23:59:00

1(2,3)

Value range

Switch-on temperature for heating function

20 – 90 °C

Hysteresis for heating function 1 – 30K

Time frame 1(2,3):

Start

Time frame 1(2,3):

Stop

0:00 – 23:59

0:00 – 23:59

Temperature difference

For independent temperature difference controllers, minimum (e.g. solid fuel boiler) and maximum temperature limits possible.

If the difference between both measurement points exceeds the hysteresis set, then A3 is activated.

In addition, one may also define a maximum temperature for the energy consumer and a minimum temperature for the energy source.

Typical setting

40 °C

10K

0:00

23:59

"Basic Setup" menu

Display Meaning

Line Value

Value range

14 3

Variable selection: cooling function, thermostat function or temperature difference controller function

0 = Off

1= Cooling

2 = Heating

3 = Temperature difference controller

15 5

Selects the sensor for the independent controller (source)

Temperature sensor heat consumer is preset to S6

"Programming" menu

Display Meaning

1 – 5

Value range max 75 °C min 15 °C dT max 7 K dT min 3 K min 00:00:00

1(2,3) max 23:59:00

1(2,3)

Maximum temperature for heat consumer in °C

Minimum temperature for heat source in °C

Hysteresis dT max in K

15 – 95 °C

0 – 95 °C

3 – 40K

Hysteresis dT min in K 2 – 35K

Time frame 1(2,3):

Start for independent controller

Time frame 1(2,3):

Stop for independent controller

0:00 – 23:59

0:00 – 23:59

Factory setting

3

5

Typical setting

75 °C

15 °C

7K

3K

0:00

23:59

(0:00 for 2 and 3)

7.1.4 Tube collector or start function

If the function is active, then the solar circuit pump is started using a time frame

– independently of the actual collector temperature. In this way, the medium is transported to the measuring point for the collector temperature.

"Basic Setup" menu

Display Meaning

Line Value

4 1

Special function for time-controlled circulation when using tube collectors

"Programming" menu

Display Meaning

Value range Factory setting

0 = Off

1 = On

0 = Off

min 6:00

4 max 20:00

4

Time frame 4: Start for tube collector function

Time frame 4: Stop for tube collector function

Value range Typical setting

0:00 – 23:59 6:00

0:00 – 23:59 20:00

7.2 Protective functions

The controller is equipped with the following protective functions.

7.2.1 Collector protection

If the storage tank has reached the set maximum temperature and the collector temperature exceeds the set collector protection temperature (line 1), the solar circuit pump is switched on. The solar circuit pump is switched off once the collector temperature is 10 K below the maximum value.

In this case, the storage tank is charged to 95° C, regardless of the set maximum temperature.

7.2.2 Recooling (holiday function)

The collector protection function is only effective if the storage tank temperature is below the temperature limit (95°). During a holiday period, for example, the storage tank must therefore be discharged at night to the set recooling temperature.

Warning: do not activate this function at the same time as backup heating!

"Basic Setup" menu

Display Meaning

Line Value

0

1

2

3

0

0

65 °C

Collector protection function on/off protection function activates

Recooling protection function on/off

(only if collector protection is on)

Temperature to which the storage tank is recooled with collector protection function activated

Value range Factory setting

0 = Off

1 = On

0 = Off

110 – 150 °C 130 °C

0 = Off

1 = On

30 – 90 °C

1 = On

65 °C

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

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Settings and changes in this menu must only be carried out by a specialist technician. Incorrect settings can damage or adversely affect the function of the solar power system.

7.2.3 System protection

To protect system components, the solar circuit pump is switched off if the collector temperature exceeds the collector protection temperature (see 7.2.2) by 10 K.

If the temperature drops below the collector protection temperature, the solar circuit pump is switched on.

This function is always activated.

7.2.4 Anti-freeze protection

This function must be activated if the water or glycol mixture can freeze.

If the temperature at the anti-freeze sensor (line 12) drops below the set value, the solar circuit pump is activated and heats the solar circuit using the heat exchanger in the storage tank.

"Basic Setup" menu

Display Meaning

Line Value

11 0

12

13

6

3

Selects the sensor for the anti-freeze protection function

Temperature at which the anti-freeze protection function activates

Value range Factory setting

1 – 6

0

6

-20 °C – +7 °C 3

7.3 Additional function

7.3.1 Energy yield measurement

The energy yield of the solar power system is calculated and displayed using the temperature difference between the collector and collector return temperature, plus the measured flow rate.

Accessories required:

Energy yield set (consists of flow transmitter and tube sensor)

"Basic Setup" menu

Display Meaning

Line Value

5 0

Energy yield measurement function on/off (sensor selection)

Value range Factory setting

0 = Off

1 = On

0 = Off

8 System monitoring

The occurrence of errors is generally indicated by a flashing symbol.

8.1 Sensor monitoring

The connected sensors and sensor cables are monitored for interruptions and short-circuits. Errors are indicated by the symbol. The source of the error can be found by scrolling up or down in the Info menu.

8.2 Flow monitoring

The controllers are programmed so as to display a message if the flow is interrupted, e.g. via pump fault or vapour in the system. However, this notification does not switch off the pump.

"Basic Setup" menu

Display

+

Meaning

No circulation in solar circuit

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9 Troubleshooting

In principle, all system errors can be placed in one of two categories:

■

Faults that the controller can detect automatically and for which error messages can be shown

■

Faults that cannot be reported by the controller

9.1 Faults with error messages

Error displayed on-screen

Possible causes

flashing

■

■

Disruption to sensor cable

Sensor defective

Action to take

Check cable

flashing

Circulation fault:

no flow-through

+ flashing

Also displayed with energy yield

measurement:

■

■

Short-circuit in sensor cable

Sensor defective

■

■

■

■

Fault in pump connection

Pump defective

Air in the system

Flow meter defective

■

■

■

Connection to flow meter defective

Disruption to sensor cable

Sensor defective

Check sensor resistance, replace sensor if necessary

Check cable

Check sensor resistance, replace if necessary

Check cabling

Replace pump

Vent system

If visible, check whether the flywheel of the meter moves when the system is running

Check cable

Check cable

Check sensor resistance, replace sensor if necessary

9.2 Faults without error messages

For faults and malfunctions that cannot be displayed, you can use the following table to identify them, plus evaluate the possible causes and sources of such errors. If you cannot rectify the fault by using the description below, you will need to contact your supplier or installer.

Error display

No display possible

Outputs are not switched on

"Pump" icon turns, but pump is not on

Possible causes

■

230 V mains power supply unavailable

■

■

■

■

■

■

Fuse inside unit defective

Unit defective

Unit is in manual operation mode

Switch-on condition not yet achieved.

Disruption to pump connection.

Pump has seized up.

Action to take

Switch on or connect up control unit

Check fuses for building power supply

Check fuse*, replace if necessary with new 2A

(T) fuse.

Check 230 V components for short-circuits

Contact your supplier

Exit "Manual Operation" menu.

Wait until switch-on condition achieved

Check cable to pump

Ensure pump can run smoothly

Contact your supplier.

Temperature display fluctuates strongly at short intervals

■

■

■

Switched output has no current.

Sensor cabling has been laid near to 230 V cables

■

Long sensor cables extended using unshielded leads

Unit defective

Reposition sensor cabling, shield sensor leads

Shield sensor leads

Contact your supplier

Important: any faults involving the 230V/AC mains power supply must only be rectified by a technician!

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Specifications subject to change as technical improvements are made.

10 Specifications

Casing

Material

Dimensions (L x W x H) in mm, weight

Protection class

Electrical specifications

Supply voltage

Radio interference class

Max. cable cross-section, 230 V connections

Temperature sensor / temperature range

Test voltage

Switching voltage

Power per switched output

Total power of all outputs

Fuses

Other

Recommended flow transmitters

Operating temperature

Storage temperature

Humidity

100% recyclable ABS casing for wall mounting

175 x 134 x 56; approx. 360 g

IP20 according to DIN 40050, IEC 529, VDE

0470, EN 60529

AC 230 V/50 Hz, -10 – +15%

N (as defined by VDE 0875)

2.5 mm² fine-/single-wire

PT1000

1 kΩ at 0 °C, – 25 °C – 200 °C

4 kV 1 min according to EN 60730/DIN, VDE

0631, IEC 60664/IEC

230 V AC

1 A / approx. 230 VA for cos ö = 0.7-1.0

2 A / approx. 460 VA maximum

Fine-wire fuses 5 x 20 mm, 2A (T)

2 amperes, time lag fuse

PVM 1.5/90 1500 l/h, Tmax >= 90 °C, 1l/pulse

0 – + 50 °C

-10 – + 65 °C max. 60 %

11 PT1000 resistance table

Temperature sensors can be checked for proper function by using an ohmmeter and consulting the following temperature resistance table:

Temperature in °C

-30

-20

-10

0

10

20

30

40

50

Resistance in ohms

882

921

960

1000

1039

1077

1116

1155

1194

Temperature in °C

60

70

80

90

100

120

140

200

Resistance in ohms

1232

1271

1309

1347

1385

1461

1535

1758

12 Guarantee terms and conditions

STELLA controllers are manufactured with care and inspected using an automated test facility. If faults should occur, please make an initial check for operator, configuration or system errors. You should also inspect connections to pumps and temperature sensors.

SUNSET Energietechnik GmbH guarantees workmanship according to the following conditions for 24 months after purchase date.

a) This guarantee covers defective workmanship in the item purchased.

This guarantee is rendered null and void if the fault results from any of the following: operator error, exceeding the technical specifications, incorrect wiring or improper technical modifications to the device (by the purchaser or a company other than SUNSET Energietechnik GmbH).

b) Guarantee claims must be made in writing, giving a detailed description of the fault and including a copy of the purchase receipt.

SUNSET Energietechnik GmbH will honour claims by choosing, at its discretion, between:

– Repair (overhaul); or

– Supplying a fully-functional replacement.

Repairs will take no longer than 1 month from receipt of the unit by SUNSET

Energietechnik GmbH.

If the fault has not been remedied on the second repair attempt, then the purchaser has the right to be supplied with a fully-functional replacement.

Replacement parts are supplied with a new guarantee according to these terms and conditions.

c) Any other guarantee rights (cancellation, discounts) are hereby excluded.

Rights granted by this guarantee are due to the purchaser only and are not transferable.

If defects occur within the guarantee period, please first inform your supplier/installer. Product returns must always be accompanied by a description of the fault, plus, if possible, a system diagram and wiring plan.

13 Declaration of conformity

We, SUNSET Energietechnik GmbH, hereby declare our sole responsibility for ensuring that the STELLA

1316 product complies with the following directives:

DIRECTIVE 2004/108/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 15 December 2004 on the approximation of the laws of the Member States relating to electromagnetic compatibility and repealing Directive 89/336/EEC

Law on the electromagnetic compatibility of equipment (EMC) of 26 February 2008

DIRECTIVE 2006/95/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 December 2006 on the approximation of the laws of the Member States concerning electrical equipment for use within certain voltage limits

DIN EN 61326-1, VDE 0843-20-1:2006-10 Electrical measurement, control and laboratory use – EMC requirements – Part 1: General requirements (IEC 61326-

1:2005); German version EN 61326 -1:2006

DIN EN 61326-2-2, VDE 0843-20-2-2:2006-10 Electrical measurement, control and laboratory use – EMC requirements – Part 2-2: Particular requirements – Test, operating conditions and performance requirements for portable test, measurement and monitoring equipment for use in low voltage power supply systems (IEC

61326-2-2:2005); German version EN 61326-2-2:2006

DIN EN 60730-1, VDE 0631 Part1:2009:06 -1 Automatic electrical control devices for household and similar use – Part 1: General requirements (IEC 60730-1:1999, modified + A1:2003, modified + A2:2007, modified); German version EN 60730-1:2000 + A1:2004 + A12:2003 + A13:2004 + A14:2005 + A16:2007

+ A2:2008

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