Steca TR-A501T-U Installation And Operating Instructions Manual

Download

Temperature differential controller

5 inputs, 1 output

742.110 | Z03 | 14.50 | Subject to change due to technical improvements!

Installation and operating instructions

742.110 | 14.50

1 General safety instructions 3 2 Proper usage 4 3 About these instructions 4

3.1 Contents 4

3.2 Target audience 4

3.3 Danger levels in warning notices Évaluation du niveau de risque dans les avertissements 4

4 Installation 5

4.1 Opening/Closing the casing 5

4.2 Mounting the casing 6

4.3 Establishing the electrical connections 7

4.4 Terminal pin assignments 10

5 Commissioning the device for the first time 11 6 Structure 15

6.1 Casing 15

6.2 Display 15

7 Operation 18

7.1 Operating buttons 18

7.2 Display when operating 18

8 Modes of operation 18

8.1 Changing the mode of operation 18

8.2 “Off” mode 19

8.3 “Manual” mode 19

8.4 “Automatic” mode 20

9 Settings menu 22

9.1 Overview 22

9.2 Calling up the settings menu and selecting a menu entry 22

9.3 Setting the time 23

9.4 Setting the system 23

9.5 Setting the functions 23

9.6 Setting the parameters 23

9.7 Resetting

to factory settings 23

10 Functions 24

10.1 Operation 24

10.2 Characteristics 25

10.3 Function descriptions 27

11 Parameters 39 12 Dismantling and disposal 41 13 Information messages 41

Contents

742.110 | 14.50

1 General safety instructions

• This document is part of the product.

• Use the device only after reading and understanding this document.

• Keep this document in a safe place for the entire service life of the device. Pass this

document on to subsequent owners and operators of the device.

• Adhere to all safety instructions. Consult (further) professional personnel in the event of any ambiguities.

• The measures described in this document may only be performed by qualified technical professionals. Exception: End-customers may operate the device when they have previously been trained by a technical professional.

• The solar system can be damaged by improper operation of the device.

• The device must not be connected to the mains power supply when

– the casing is open or damaged. – cables are damaged.

• Factory labels and markings must never be altered, removed or rendered unreadable.

• Observe the prescribed conditions of use, see section 15, p. 45.

• This device is not intended for:

– Children – Persons with physical, sensory or mental impairment – Persons without sufficient experience or knowledge unless they are instructed in

the use of the device, and initially supervised, by a person responsible for their safety.

This product is CSA certified and complies with the requirements of the applicable UL

and CSA standards in terms of design and operating behaviour. Please contact your dealer should you require further information on this.

14 Troubleshooting 42

14.1 General faults 42

14.2 Error messages 43

14.3 Checking the Pt1000 temperature sensors 44

15 Technical data 45

15.1 Controller 45

15.2 Cable specifications 46

16 Exclusion of liability 46 17 Legal guarantee 46 18 Notes 47

742.110 | 14.50

2 Proper usage

The temperature differential controller, subsequently referred to as the controller, is an independently installed electronic temperature controller for on-surface installation. Integration into a pump assembly is possible when the technical specifications of the controller are adhered to. The maintenance-free controller is exclusively intended for controlling solar and heating systems.

3 About these instructions

3.1 Contents

This manual contains all information required by a technical professional for setting up and operating the temperature differential controller.

3.2 Target audience

The target audience of this manual are technical professionals who

• have the knowledge of terminology and the skills necessary for setting up and operating solar systems.

• have the necessary training, knowledge and experience, and knowledge of the applicable regulations in order to evaluate and recognise the dangers inherent in the following work: – Installation of electrical equipment – Production and connection of data communication cables – Production and connection of mains grid power supply cables

3.3 Danger levels in warning notices Évaluation du niveau de risque dans les avertissements

Danger level Niveau de risque

Likelihood of occurrence Éventualité de l’intervention

Consequences resulting from non-compliance Conséquences en cas de non-respect

Danger

Imminent threat of danger Danger imminent

Death, serious bodily injury Mort, lésions corporelles graves

Warning

Avertissement

Possible threat of danger Danger éventuel

Death, serious bodily injury Mort, lésions corporelles graves

Caution

Attention

Possible threat of danger Danger éventuel

Minor bodily injury Lésions corporelles simples

Notice

Avis

Possible threat of danger Danger éventuel

Property damage Dommages matériels

742.110 | 14.50

4 Installation

The following section describes only the installation of the

4.1 Opening/Closing the casing

4.1.1 Remove the front panel

by the grooves at the sides

and pull forwards

(Fig.

4.1.2 Mount the front panel

and then press it onto the casing until it latches

4.1.3 Remove the terminal cover

(Fig. 1).

4.1.4 Mount the terminal cover

Tighten the screw

to a torque of 0.5

742.110 | 14.50

4.2 Mounting the casing

√ The mounting location must satisfy the prescribed conditions of use; see sec-

tion 15, p. 45.

√ The mounting surface is vertical and allows good access for installation.

Danger

Risk of death by electrocution!

• Disconnect the controller from the power supply before opening the casing.

• Make sure that the power supply cannot be unintentionally switched on when the

casing is open.

• Do not use the casing as a drilling template.

1. If necessary, remove the terminal cover

2. Screw in the screw for the upper mounting hole

 (Fig. 2) until the screw head has

a clearance of 5 ... 7 mm (0.20 ... 0.28 inch) from the mounting surface.

3. Hang the controller on the screw by the upper mounting hole and align it vertically.

4. Mark the position of the lower mounting hole

 through the casing.

5. Remove the controller and prepare the mounting hole for the lower screw.

6. Hang the controller by the upper mounting hole

 and then fasten the screw in the

lower mounting hole .

7. Mount the terminal cover.

ø5 (0.20 inch)

8.5 (0.33 inch)

140 (5.51 inch)

105 (4.13 inch)

156 (6.14 inch)

Fig. 2: Rear side of the controller with the upper  and lower  mounting holes

742.110 | 14.50

4.3 Establishing the electrical connections

Danger

Risk of death by electrocution! Make sure that the following conditions are satisfied when performing the work described in this section:

• All cables leading to the controller must be disconnected from the power supply and

it must be ensured that they cannot be unintentionally reconnected during installation.

• Each connection terminal must only be connected to a single conductor.

• The protective earth conductors (PE) from the mains cable and pump and valve

cables must be connected to the protective earth conductor terminal block.

• All cables must be laid so that persons cannot stand on them or trip over them.

• The cables must satisfy the requirements listed in section 15.2, p. 46.

• The local power supply must match the specifications on the type plate of the con-

troller.

• The power supply cable is to be connected to the mains power as follows:

– using a plug connected to a wall mains socket or – via an isolating mechanism allowing complete isolation in the case of permanent

wiring.

• The power supply cable must be laid in conformance to all applicable legal guide-

lines and regulations of the local electricity supplier.

Notice

Danger of damage and malfunction.

• Connect only components that do not overload the controller inputs and outputs;

more information is provided on the type plate and in section 15, p. 45.

• For output R1 the following applies:

– Speed control must be deactivated when an external relay is connected. – The correct pump type must be set (standard/high-efficiency pump).

More information on this is provided in sections 5, p. 11 and 11, p. 39 (P08).

Notes

• Any connection polarity may be used for the 1 – 5 signal inputs and outputs.

• Only type Pt1000 temperature sensors may be used.

• Lay the sensor cables at least 100 mm (4 inch) away from any power supply cables.

• Use shielded sensor cables when inductive sources are present, e.g. high-voltage

lines, radio transmitters, microwave devices.

742.110 | 14.50

4.3.1 Position of the connection terminals

L R1

PE PEPEPE

S54321

0–10

Fig. 3: Terminal clamps in the lower part of the controller (terminal cover removed)



Power connection terminal block:

1x phase conductor (mains input)

1x output (TRIAC, for pump)

2x neutral conductor (common neutral conductors for mains power input and output)

Note

Output R1 is protected by an electronic fuse.



Protective conductor terminal block:

4x protective earth (common protective earth for power connection terminal block)



Signals terminal block:

1 – 4 4x sensor input (Pt1000 temperature sensor) 5

1x sensor input (Pt1000 temperature sensor or pulse water meter input)

not used

0–10 R1 1x control output (for 0–10 V controlled high-efficiency pumps)

6x mass connection (common mass for sensor inputs and control outputs)



Pin strip, for internal use only



Cable openings on the rear side of the casing



Upper strain relief clamps (2 identical plastic links, each with 2 strain relief clamps, supplied in the scope of delivery)



Lower strain relief clamps



Cable openings at the bottom of the casing

742.110 | 14.50

4.3.2 Preparing the cable openings

The cables can be fed through openings in the rear wall of the casing or at the bottom of the casing. The openings are pre-punched and must be prepared as required before installation.

Prepare the cable openings in the rear wall of the casing as follows:

1. Break out the cable openings  (Fig. 3) using a suitable tool.

2. Deburr the edges.

Prepare the cable openings at the bottom of the casing as follows:

1. Cut the required cable openings

 (Fig. 3) at the left and right using a suitable knife

and break them out.

2. Deburr the edges.

4.3.3 Connecting the cables

√ All cables are voltage-free. √ The cable openings have been prepared.

X Observe the following points when connecting the cables:

• Connect the cable conductors to the correct terminals as described in sec-

tion 4.4, p. 10.

• Mains input and output: First connect PE, then N and L.

• Strain relief:

– First clamp the lower strain relief clamps and then the upper strain relief

clamps.

– When using the upper strain relief clamps, use the plastic links as described

below.

– If the opening in the strain relief clamp is too large, e.g. in the case of thin ca-

bles, turn over the strain relief clamping bar (with the bend facing down). Only use the strain relief clamps for cables entering the bottom of the casing. Use external strain relief clamps when feeding cables through the rear of the casing.

4.3.4 Inserting/Removing plastic links

Insert the plastic links as follows:

1. Insert the right plastic strip with the latching protrusion first  (Fig. 4).

2. Press the other side of the plastic strip down

, until the spring clamp latches into

place.

3. Insert the left plastic strip the other way around (latching protrusion to the left,

spring clamp to the right).

Fig. 4: Inserting the right plastic link

742.110 | 14.50

Remove the plastic links as follows:

1. Insert a screwdriver under the right plastic link between the casing and the spring

clamp ,  (Fig. 5).

2. Carefully push the screwdriver to the left

. Lever the spring clamp  to the right

until the plastic link  is free.

3. Pull out the plastic link upwards by hand

.

4. Remove the left plastic link accordingly.

Fig. 5: Removing the right plastic link

4.4 Terminal pin assignments

For each solar system that can be selected at the controller, the external components (pumps, valves, temperature sensors) must be connected to particular terminals. The following table provides information on this:

• Graphic and number of the solar system on the controller display. The graphic is only

intended to provide an overview and is not a technical drawing.

• Terminal pin assignments of the connected components

Display Legend Terminal layout

No system

Note

No System is used when only the functions are used. When No system is selected then all inputs and outputs are freely available

for use by the functions. More information on this is provided in section 10, p. 24.

1 storage tank, 1 collector array

T1: Collector array sensor T2: Lower storage tank sensor R1: Solar circuit pump

1, 2, R1, N, PE (0-10 R1,

)

742.110 | 14.50

Display Legend Terminal layout

1 swimming pool, 1 collector array

T1: Collector array sensor T2: Swimming pool sensor R1: Solar circuit pump

1, 2, R1, N, PE (0-10 R1,

)

Tab. 1: Terminal pin assignments of the solar power systems

Terminal pin assignments for 0–10 V-controlled high-efficiency pumps: The power supply must be connected to output R1 (N, PE), the control cable for the pump electronics must be connected to 0-10

R1 and .

5 Commissioning the device for the first time

Danger

Risk of death by electrocution! Be sure to perform all the measures listed in section 4 before starting the first commissioning.

Notes

• After commissioning the controller for the first time, it is configured in such a man-

ner that it can be used in most applications without changes.

• After completing the first commissioning, later recommissioning is not necessary.

• The following steps must also be performed after the device has been reset to the

factory settings.

Overview

Time

System

Pump R1

Type / minimum speed

Functions

ESC /

Operation mode Off is

switched on.

ESC /

SET

The first time the controller is switched on, the following settings are made via a guided configuration process (Fig. left):

• Time

• System (hydraulic variant)

• Type (Standard/high-efficiency pump) and minimum

speed of the connected pumps (not System 0.1)

• Functions

Values can be changed later within the guided configuration process. The following applies:

• /ESC/ navigate blockwise forwards and back-

wards (Fig. left:  = forwards; ESC/ = back).

• Navigation (with /ESC/) is always possible after

completion of a block.

• Later modification of a block is initiated using the

SET button.

742.110 | 14.50

Commission the controller for the first time as follows:

Setting the time

1. Apply power to the controller.

– The time 12:00 is displayed. – 12 flashes (Fig. left). – Backlighting is red.

2. Press  to set the hours.

3. Press SET. The minute flashes.

4. Press  to set the minutes.

5. Press SET. The set time is displayed.

Selecting a system

6. Press . System 1.1 is displayed, 1.1 flashes (Fig. left).

7. Press  to select a different system.

8. Press SET.

If System 0.1 was selected in step 7, then continue with step 18.

Setting pump 1 (output R1)

9. Press . AC and flash (example in Fig. left).

10. Notice

Standard pump: Select AC! High-efficiency pump: Select HE!

Press  to set the type of pump 1.

11. Press SET.

12.

Notice

Pay attention to the pump characteristics when selecting HE (high-efficiency pump).

Only if HE was selected in step 10:

Press  to set the characteristics of the high-efficiency pump; see Tab. 2 and Fig. 6 on p. 14.

13. Press SET: – If bA or bb was selected in step 12, SC is displayed; off,

and

flash (example in Fig. left; SC = Speed control).

– If C was selected in step 12, then continue with step 18.

14. Press  to switch on the speed control if necessary (on flashes).

15. Press SET. If off was selected in step 14. then proceed with step 18.

742.110 | 14.50

16. min, value %, and flash. Press  to set the minimum speed of pump 1 in %.

17. Press SET.

18. Press . F: is displayed.

Set the functions (necessary for System 0.1, or as required for other systems. The functions can also be set at a later date.)

19. Press SET to set the functions. F:01 (function number) flashes (example in Fig. left). or Press  to skip the setting of the functions; Ok flashes. Continue with step 28.

20. Press  to select a different function; Function descriptions in section 10.3.

21. Press SET. oFF is displayed.

22. Press SET. oFF flashes.

23. Press . on flashes.

24. Press SET. The function is activated.

25. Set the characteristics (see section 10.1, p. 25).

26. Press ESC.

27. Press . Ok flashes.

Finishing Initial commissioning

28. Press SET to finish the initial commissioning. The controller switches to the operating mode Off (example in Fig. left).

Press /ESC to display the previous settings and correct them if necessary.

Set the operating mode (off, manual, automatic)

29. Remove the front panel (Fig. left and section 4.1.1).

30.

Notice

Danger of pump damage if run dry. Only switch the system to Manual or Automatic mode when the system is filled.

Press and hold the mode button (arrow in Fig. left) for

2 seconds to change the operating mode; more information on this is provided in section 8.

31. Mount the front panel. The controller is now ready for operation.

742.110 | 14.50

Characteristics of high-efficiency pumps

Display Pump type Characteristic curve

High-efficiency pump with a 0–10 V profile having a rising characteristic curve (Fig. 6)

0 V: pump off 10 V: pump at maximum speed

High-efficiency pump with a 0–10 V profile having a falling characteristic curve (Fig. 6)

0 V: pump at maximum speed 10 V: pump off

Pressure-controlled high-efficiency pump

– (no control cable; switched on/off via the supply voltage)

Tab. 2: Characteristics of high-efficiency pumps

U/V

RPM

U/V

RPM

Fig. 6: Characteristics of high-efficiency pumps with a 0–10 V profile having a rising characteristic

curve (bA, left) and a falling characteristic curve (bb, right)

742.110 | 14.50

6 Structure

6.1 Casing

ESC

SET

No. Element

see

section



Mode button (under front panel)

7.1 8



, SET, ESC,  operating buttons

7.1



Display 6.2



Front panel 4.1



Terminal cover 4.3.1



Terminal cover fastening screw

–

Section 4.3.1 describes the terminals under the

terminal cover.

Fig. 7: Front view of the controller

6.2 Display

6.2.1 Overview

max

min

max

TTV

yst

uncPara

SET



Interv.

min

max

off

Fig. 8: Overview of the display areas (all elements visible)



System graphics



Settings menu



Pictograms for functions



Operational and setting values

The display areas are described below.

742.110 | 14.50

6.2.2 Symbols used in the system graphics

The following table describes the symbols used in the system graphics ( in Fig. 8).

Symbol Description Symbol Description

Pipework Pump, switched on

Collector (array) Pump, switched off

Maximum collector temperature reached

Temperature sensor

Storage tank Back-up heating

Swimming pool Solid fuel boiler

Sufficient solar irradiation available for loading

Domestic water outlet

Drainback

Symbols Description

 Drainback tank  Symbol Short startup for drainage assistance  Symbol Filling  Symbol Draining + Symbol Stabilising

6.2.3 Settings menu

The settings menu ( in Fig. 8) contains the following entries:

yst

uncPara

SET

Time System

Functions Parameters

Reset to factory settings

742.110 | 14.50

6.2.4 Pictograms for functions

The following table describes the pictograms used for functions ( in Fig. 8).

Symbol Description Symbol Description

Manual operation Holiday – recooling

Pump is speed controlled

Freeze recirculation

Interval

Stagnation reduction

Symbol is visible while the function/parameter is being edited in the settings menu.

Symbol flashes: The function is activated and is actively intervening in the control process. Symbol does not flash: The function is activated and is not actively intervening in the control process or the function is currently being edited in the setting menu.

6.2.5 Operational and setting values

The display of the operational and setting values ( in Fig. 8) consists of the following elements:

min

max

off



Symbol for time control of functions. This symbol is displayed when

• a time restriction/control has been set,

• the status of time restriction/control is displayed,

• the time restriction blocks a temperature control (symbol flashes).



Number of the time window that is currently being set/displayed or within which the current time lies. The time control of a function consists of 1 to 3 configurable time windows. Example: Time window 1: 06:00 – 08:00 Time window 2: 11:00 – 12:30 Time window 3: 17:00 – 19:00



Additional information:

on, off: Switching state/condition on, off max, min: Maximum value, minimum value

Σ: Summed operational value since first commissioning, cannot be reset Δ: Summed operational value since last reset to 0



Symbol is displayed when a temperature sensor is selected when setting a function.



Display of:

• Measurements

• Settings

• Error codes

• Additional information, e.g. software version



Physical unit of the value displayed in : °F, F, psi, gal/min, MBtu, MBtu/h, MMBtu, %, tn sh CO

Note

The physical units are only displayed as appropriate.

742.110 | 14.50

7 Operation

This section contains general information on operating the controller.

7.1 Operating buttons

The device is operated using the , , SET, ESC and buttons as follows:



• Scrolling up through the menu/initial commissioning

• Increases the setting value by 1 step



• Scrolling down through the menu/initial commissioning

• Decreases the setting value by 1 step

SET

• Selects a setting to be changed (setting value flashes)

• Confirms a setting value or jumps one level down in the menu

structure

• Calls up the settings menu (not in manual mode)

ESC

• Discards an entered setting

• Jumps up by one operating level

• Scrolling up during initial commissioning

Sets the operating mode

Note

We recommend that you write down all settings that you have changed, e.g. in the Notes section, p. 47.

7.2 Display when operating

• A flashing component in the system graphic means: The displayed operational or setting value applies to the flashing component. Exception: always flashes in manual mode.

• A flashing symbol is indicated in the following figures by

• Displays that are automatically alternately displayed are shown overlapping in the figures. Example: Figure in section 8.2, p. 19.

8 Modes of operation

8.1 Changing the mode of operation

Notice

Danger of pump damage if run dry. Only switch the system to manual or automatic mode when the system is filled.

1. Remove the front panel.

2. Press the

button for 2 seconds to change the mode of operation.

3. Repeat step 2 if necessary.

4. Mount the front panel.

Off

Manual operation

Automatic

2 s 2 s 2 s

742.110 | 14.50

8.2 “Off” mode

Functionality

• The output is switched off (output/control output without power, relays open).

• Off and the software version are displayed alternately.

See example in Fig. below: Software version St 1.3

• Backlighting is red.

• Settings menu can be called up.

• The Off mode is preset when the device is delivered.

Operation

X Press and hold the SET button for 2 seconds to call up the settings menu ( ).

8.3 “Manual” mode

Functionality

• Backlighting is red, spanner symbol flashes.

• The controller output (pump) can be manually switched. Possible switching states:

0: off 1: on A: Automatic operation as per the settings in the settings menu

• Current temperatures and operating hours can be displayed (status display).

• When changing to manual mode the output is switched to A. R1 is displayed. Excep-

tion: Initial commissioning (output at 0).

• Typical application: Functional test (maintenance), fault-finding.

Operation

You switch the output on and off as follows:

1. Press SET. The switching state flashes.

2. Press  to change the switching state.

3. Press SET to adopt the change.

See

in the following Figure (system 1.1 and output R1 are shown as an example).

You display the current temperatures and operating hours as follows:

1. Press ESC. The temperature/operating hours are displayed and the associated component flashes (

, display is not illustrated).

2. Press  to select a different component.

3. Press SET to leave the temperature/operating hours display.

742.110 | 14.50

SET

ESC

8.4 “Automatic” mode

Functionality

Automatic is the normal mode of operation and the system is automatically controlled. The following actions are possible:

• Display status (status display): Display the status of external components (temperatures, switching states, run times)

• Display stored min./max. values (temperature sensors) or sum/difference values (operating hours1) of the pumps and valves). Summed values (symbol ∑): Operating hours since first commissioning. Summed values cannot be reset. Difference values (symbol Δ): Operating hours since the last reset to 0

• Reset the stored min./max./difference values

• Call up the settings menu

Summed switch-on times of the output

742.110 | 14.50

Operation

√ The controller shows the status display.

You can display the status of external components as follows:

X Press  to display the status of other components ( , shown using system 1.1 as

an example).

You can display and reset the stored min./max./difference values as follows:

1. Press  as required, in order to display other components (

, component

flashes).

2. Press SET. The min./max./difference values are displayed alternately

3. If desired, press and hold the SET button for 2 seconds to reset the currently (!) displayed value

4. Press ESC. The status display is shown.

5. Repeat steps 1 to 4 if necessary.

You access the settings menu as follows:

X Press and hold SET for 2 seconds

. The settings menu appears.

SET

2 s

SET

2 s

SET

2 s

SET

2 s

SET

2 s

SET

2 s

742.110 | 14.50

9 Settings menu

9.1 Overview

The following graphic provides an overview of the structure of the settings menu.

SET SET SET SET

SET 5 s

Differential ther mostat – F14

Time System

Drainback – F01Set time

Functions

No system – 0.1

1 swimming pool, 1 collector array – 1.2

Speed control – P08

Switch-off temperature difference solar circuit – P04

Thermostat – F13

Upper storage tan

display – F07

Heat quantity – F08

Circulation – F09

Back-up heating – F10

Solid fuel boiler

– F11

Interval – F04

Parameters

Factory setting

Return increase – F12

Depending on the system selected, only certain functions and parameters can be accessed.

Quick charge – F05

Freeze recircula tion – F06

Maximum temperature storage tank – P01

Maximum collector temperature – P05

Minimum collector temperature – P06

Loading strategy – P07

Switch-on temperature

difference solar circuit – P03

Reset to factory settings

1 storage tank, 1 collector array – 1.1

Holiday – recooling – F02

Maximum temperature swimming pool – P02

Stagnation reduc-

tion – F03

9.2 Calling up the settings menu and selecting a menu entry

√ Automatic or Off mode is selected.

1. Press and hold SET for two seconds. The settings menu is displayed, menu entry

flashes.

2. Press  to select a different menu entry.

3. Change the settings as described in the following sections.

742.110 | 14.50

9.3 Setting the time

Note

The time must be once more set to the correct values if power is removed for a longer period of time. After this, the same operating mode is displayed as was active previous to the removal of power.

√ flashes.

1. Press SET. The hours display flashes.

2. Press  to change the hour.

3. Press SET. The minute flashes.

4. Press  to change the minute.

5. Press SET. The change is adopted.

9.4 Setting the system

Note

The systems are described in section 4.4, p. 10.

√

yst

flashes.

1. Press SET. The number of the current system flashes.

2. Press  to select a different system.

3. Press SET. The change is adopted.

9.5 Setting the functions

√

unc

flashes.

X Continue as described in section 10.

9.6 Setting the parameters

Note

Details on the parameters are provided in section 11, p. 39.

√

ara

flashes.

1. Press SET. P:01 (Parameter number) flashes.

2. Press  to display a different parameter.

3. Press SET. The value of the parameter is displayed, associated components flash in

the system graphics.

4. Press SET. The parameter value flashes.

5. Press  to change the value.

6. Press SET to adopt the change.

7. Press ESC. The parameter number is displayed (flashing).

8. If necessary, repeat steps 2 – 7.

9.7 Resetting

to factory settings

√ flashes, RESEt is displayed (RE and SEt alternately).

1. Press and hold SET for 5 seconds.

2. A progress display is shown for a few seconds. After this the reset is finished.

3. Continue as described in section 5, p. 11.

742.110 | 14.50

10 Functions

10.1 Operation

Displaying the functions

The following information is visible when the functions are displayed:

• Function number, e.g. F:09 (Fig. left)

• Switching state:

on: Function is activated off: Function is deactivated (Fig. left)

Note

If neither on nor off are displayed then the function cannot be used. Possible causes:

• The set system does not allow the use of this function.

• All outputs are used.

You display the functions as follows:

√

unc

flashes.

1. Press SET. F:01 flashes.

2. Press  to display the next function.

Activating the function

A function must be activated (activation = on; Fig. left) and all the associated characteristics must be correctly set before it can be used. If a function is activated and then exited before the characteristics are set then oFF flashes briefly. After this, the function is displayed with a switching state of off (function is deactivated).

You activate a function as follows:

√ Function number flashes.

1. Press SET. The function is selected.

2. Press SET. oFF flashes.

3. Press . on flashes.

4. Press SET. The function is activated.

5. Set the characteristics as described below.

742.110 | 14.50

Setting the characteristics

The functions have different numbers of characteristics. The characteristic values are always set via the same sequence of operating steps.

You set the values of characteristics as follows:

√ The function has been activated as described previously.

1. Press  to select a characteristic.

2. Press SET. The value of the characteristic is displayed, the

associated components flash in the system graphics.

3. Press  to change the value.

4. Press SET to adopt the change.

5. Repeat steps 1 to 4 for the other characteristics.

6. Press ESC when all characteristics of the function have been

set. The function number flashes.

10.2 Characteristics

The main characteristics for the functions are described below. The figures show examples.

Temperature control

When a function is to be temperature controlled, the temperature control must be switched on (tc = temperature control). In the figure, the temperature control is switched off (off).

Input

When a function requires a temperature sensor, a sensor input must be selected instead of the factory setting. The factory setting is "

–" (no input; Fig. left).

All sensor inputs are displayed for selection. A single sensor input can be simultaneously used by several functions.

Switch-on temperature difference

unc

SET

If a function contains a differential thermostat then the switchon temperature difference can be set. The affected sensor symbols blink while settings are being performed.

742.110 | 14.50

Switch-off temperature difference

unc

SET

off

If a function contains a differential thermostat then the switchoff temperature difference can be set. The affected sensor symbols blink while settings are being performed.

Switch-on temperature

If a function contains a thermostat then the switch-on temperature can be set. The affected sensor symbol blinks while settings are being performed.

Switch-off temperature

If a function contains a thermostat then the switch-off temperature can be set. The affected sensor symbol blinks while settings are being performed.

Time control

If a function is to be time controlled then the time control must be activated and the time windows must be set (cc = clock control). In the Fig. at the left the time control is switched off (off).

Starting time of a time window

When setting the start time of a time window, the following is displayed to the left of the start time (see Fig. left):

•

• Number of time window 1 ... 3, whose end time is to be set

(in this case: 1)

• on

742.110 | 14.50

End time of a time window

When setting the end time of a time window, the following is displayed to the left of the end time (see Fig. left):

•

• Number of time window 1 ... 3, whose end time is to be set

(in this case: 1)

• off

Note

The start time always lies before the end time! When an attempt is made to set a start time that is later than the end time, the end time is automatically adjusted.

10.3 Function descriptions

Table contents

The tables in this section describe the function characteristics as follows:

• The rows contain the characteristics in the same sequence as they appear on the display.

• The columns contain the following information, from left to right:

Column Description

Display Sample display when setting the characteristics. Characteristic Designation of the characteristics and their interdependence.

Dependent characteristics can only be selected and set when the higher level characteristic has the value on. This is shown as follows:

• Higher-level characteristic: bold text

• Dependent characteristics: indented to the right below the

higher level characteristic Example: In the table for the circulation function, the sensor input, switch-on temperature and switch-off temperature characteristics are only displayed when the temperature control is set to on.

min., max., factory default setting

Lower (min.) and upper limit (max.) of a characteristic range and the factory setting. When a value range only contains a few values then these are individually listed. Example: on, oFF.

Selection options in the systems

The functions can be selected in the systems as follows:

Function

System

Function

System

Function

System

0.1 1.1 1.2 0.1 1.1 1.2 0.1 1.1 1.2

F:01

x x

F:06

x x

F:11

F:02

F:07

F:12

F:03

F:08

x x x

F:13

F:04

x x

F:09

F:14

F:05

F:10

742.110 | 14.50

10.3.1 Drainback

Notice

Danger of malfunction in drainback systems

• In drainback systems, the drainback function must be activated.

• In drainback systems with speed-controlled solar circuit pumps note

the following: – Activation of the drainback function switches off the speed

control of the solar circuit pump, but this can be subsequently switched on again if desired (P:07/P:08 in Section 11).

– Adjust the minimum speed high enough so that the heat trans-

fer fluid is reliably pumped into the collector.

The following drainback function characteristics can be set: Filling time: When switched on, the solar circuit pump runs for the duration of the filling time in order to pump the heat transfer fluid into the collector. Stabilising time: After the filling time has expired, the solar circuit pump continues to run for the duration of the stabilising time. The following applies:

• The solar circuit pump also continues to run for this time even when the switch-off conditions are satisfied.

• When the speed control is activated and the solar irradiation is too low (no sun symbol on the display) the pump runs at minimum speed.

• After expiry of the stabilising time, the controller checks to see if the solar irradiation is sufficient to continue loading the storage tanks.

Draining time: The solar circuit pump is switched off during the draining time. This allows the heat transfer fluid to flow back into the drainback tank and the solar circuit is automatically drained. Short startup time: After the draining time has expired, the solar circuit pump runs for the duration of the short startup time (a few seconds). In most cases, this supports the draining process and sucks the remaining heat transfer fluid out of the solar circuit.

Notes The drainback function cannot be active simultaneously with the following functions:

• Interval

• Reduction of stagnation phases

• Holiday – recooling

• Freeze recirculation

742.110 | 14.50

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Filling time 1 ... 10 minutes 3 minutes Stabilising time 1 ... 15 minutes 2 minutes

Draining time: 1 ... 30 minutes 5 minutes Short startup time 0 ... 60 seconds 0 seconds

10.3.2 Holiday – recooling

Attempts to reduce, or even to avoid, the system standstill (stagnation) times at high temperatures. To do this, at night the storage tank is discharged as far as possible to the set minimum temperature, if the storage tank temperature during the day was 20 F below the set maximum temperature. Stagnation occurs when not enough hot water is removed from the system during an absence (holiday).

Notes

The following applies to this function:

• Only activate if you intend to be absent for an extended period.

• Deactivate this after returning from a holiday in order to avoid an

unnecessary waste of energy via the collector circuit.

• This function cannot be activated in systems with swimming pools.

• This function cannot be active at the same time as the drainback

function.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Minimum storage tank temperature 32 °F 200 °F 95 °F

742.110 | 14.50

10.3.3 Reduction of stagnation phases

Delays the end of the storage tank's loading phase in order to reduce, or even to avoid, the system standstill (stagnation) times at high temperatures. To do this, the pump is stopped repeatedly, and only briefly switched on again at high collector temperatures. Since the efficiency drops heavily at high collector temperatures, the loading takes longer and possible stagnation occurs later.

Notes

• This function cannot be active at the same time as the drainback function.

• This function cannot be activated in systems with swimming pools.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

10.3.4 Interval

Periodically switches the solar circuit pump on and off in order to measure the actual collector temperature. The delay between 2 switch-on operations and the switch-on duration can be set. Applications:

• Collector types where the mechanical construction prevents the temperature from being measured at a suitable place

• Unsuitable position of the temperature sensor on the collector

The function can be time restricted to prevent unnecessary periodic operation at night.

Note

This function cannot be active at the same time as the drainback function.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Time window start/end 0:00 23:59 8:00/19:00 Wait time 1 min 999 min 15 min

Switch-on duration 3 s 999 s 5 s

742.110 | 14.50

10.3.5 Quick charge

Uses a higher loading temperature to load the upper region of the storage tank more quickly in order to provide early prevention of back-up heating by the conventional heating system. To do this, the loading strategy of the storage tank is changed from differential loading to absolute temperature loading as soon as the temperature in the upper tank region drops below T

. At the same time, an attempt is made to achieve a higher temperature in the storage tank by using the speed control.

To retain the proven quick charging functionality , when Ton is changed the value

of T

off

is changed in parallel.

Note

To use the quick charge function, the speed control must be switched on; more information on this is provided in section 11, p. 39 (P08).

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Sensor input for upper storage tank temperature

1 ... 5 –

Switch-on temperature T

32 °F 185 °F 125 °F

Switch-off temperature T

off

Ton + 4 F Ton + 20 F 130 °F

10.3.6 Freeze recirculation

Attempts to prevent freezing of the collectors by pumping heat from the storage tank into the collectors:

• Collector temperature below 40 °F: solar circuit pump is switched on.

• Collector temperature above 45 °F: solar circuit pump is switched off.

The freeze recirculation function is only useful when the heat transfer fluid contains insufficient or no anti-freeze. It is recommended to generally use heat transfer fluid with anti-freeze!

Notice

Despite the freeze recirculation function being activated, the solar system can freeze under the following conditions:

• The storage tank is unloaded, a back-up heating system is not pre-

sent.

• Heat transfer fluid contains insufficient or no anti-freeze.

• Power outage

• Unsuitable position of the temperature sensor on the collector

• Collector sensor or cable is broken or has a short circuit.

• The collectors are installed in a position exposed to the wind.

• Solar circuit pump is faulty.

Note

This function cannot be active at the same time as the drainback function.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

742.110 | 14.50

10.3.7 Upper storage tank display

Shows the temperature in the upper region of the storage tank. For this, an appropriate sensor must be connected to the tank. The measured temperatures are not used for control purposes.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Sensor input for upper storage tank 1 ... 5 –

10.3.8 Heat quantity

unc

SET

off

Calculates the acquired heat volume based on the following information:

• Supply temperature

• Return temperature

• Flow rate volume determined via calculations based on the pump

speed or by pulse water meter measurements (terminal 5).

Note

Calculation based on the pump speed cannot be performed when No System (System 0.1) has been selected.

• Glycol proportion and accounting for the temperature-dependent

thermophysical properties of the heat transfer fluid. Additional possibility: Display of the amount of CO2 saved by using the system. The amount of CO2 is calculated from the acquired heat volume. To do this, the controller requires the conversion factor Ibs

CO2

/kWh

therm

be entered.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

unc

SET

Type of flow rate acquisition tyP 1, tyP 2

–

unc

SET

max

Type 1: Flow rate value at max. pump speed F

max.

. When the Fig. at the left is displayed (value flashes) then enter the value read from the flow rate display.

min.

999.9

gal/min

0.0 gal/min

unc

SET

min

Type 1: Flow rate value at min. pump speed F

min.

. When the Fig. at the left is displayed (value flashes) then enter the value read from the flow rate display.

0.0 gal/min F

max.

0.0 gal/min

742.110 | 14.50

unc

SET

Type 2: Flow rate of the pulse water meter in litres/pulse; see the pulse water meter data sheet.

1.0 gal...10.0 gal, 1 l, 10 l, 25 l

–L

(no flow

rate value

selected)

Glycol proportion 0 % 60 % 40 % Supply sensor input (warm) 1 ... 5 – Return sensor input (cold) 1 ... 5 –

unc

SET

CO2 display on, oFF

oFF

unc

SET

lbs

CO2

/kWh

therm

0.100 2.500 1.918

tyP 1: Calculation of the flow rate from the pump speed. To do this, the displayed flow rate values are entered at two measuring points (pump speed min. and max.). tyP 2: Determining the flow rate using a pulse water meter. The flow rate of the pulse water meter in litres/impulse is entered.

Source: Hawaiian Electric Co., Inc. HECO Residential Rebate Program, Solar water heating system information

sheet (2007): 1.918 Ibs

CO2

/kWh

therm

10.3.9 Circulation

Switches a circulation pump on and off on a temperature and/or time controlled basis. The pump must be connected to output R1. Temperature control: If the temperature in the circulation return falls below the Ton value, then the circulation pump is switched on until the T

off

temperature is reached.

Time control: The circulation pump is switched on when the current time lies within one of 3 configurable time windows. Temperature and time control: The circulation pump is switched on when the switch-on conditions for the temperature and time control are satisfied.

Note

Install the circulation sensor at least 1.5 m (60 inch) away from the storage tank to avoid false measurements due to heat conduction of the pipes.

742.110 | 14.50

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Pump type AC, HE

Pump characteristics (only HE) bA, bb, C (see p. 14)

–

Temperature control on, oFF

oFF

Sensor input for circulation return temperature sensor

1 ... 5 –

Switch-on temperature T

32 °F T

off

– 4 F 85 °F

Switch-off temperature T

off

Ton + 4 F 200 °F 95 °F

Time control on, off

off

Time window 1 start/end 0:00 23:59 6:00/8:00 Time window 2 start/end 0:00 23:59 12:00/13:30 Time window 3 start/end 0:00 23:59 18:00/20:00

Notice

Standard pump: Set AC! High-efficiency pump: Set HE! External relay: Set AC pump type!

10.3.10 Back-up heating

unc

SET

off

Performs temperature-dependent switching of output R1 for heating a storage tank using an oil or gas burner. The function can be time restricted. Temperature control: If the temperature in the storage tank falls below the Ton value, then the external heating is switched on until the T

off

tem-

perature is reached. Time restriction: The function is executed when the current time lies within one of 3 configurable time windows.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Pump type AC, HE

Pump characteristics (only HE) bA, bb, C (see p. 14)

–

Sensor input for readiness part of the storage tank

1 ... 5 –

Switch-on temperature T

32 °F T

off

– 4 F 130 °F

Switch-off temperature T

off

Ton + 4 F 200 °F 140 °F

Time restriction on, oFF

oFF

Time window 1 start/end Time window 2 start/end Time window 3 start/end

0:00 0:00 0:00

23:59 23:59 23:59

6:00/8:00 12:00/13:30 18:00/20:00

Notice

Standard pump: Set AC! High-efficiency pump: Set HE! External consumer (e.g. 115 V relay): Set AC pump type.

742.110 | 14.50

10.3.11 Solid fuel boiler

unc

SET

off

Controls a pump in order to heat a storage tank using a solid fuel boiler. The pump must be connected to output R1. The pump is switched on when all of the following conditions are satisfied at the same time:

• The temperature difference between the solid fuel boiler and the storage tank exceeds T

diff on

• The solid fuel boiler temperature lies above the min. solid fuel boiler temperature.

• The storage tank temperature lies below the max. storage tank temperature.

The pump is switched off when one the following conditions is satisfied:

• The temperature difference between the solid fuel boiler and the storage tank drops below T

diff off

• The solid fuel boiler temperature drops below the min. solid fuel boiler temperature.

• The storage tank temperature reaches the max. storage tank tem- perature.

Speed control of the pump can be activated as required. The loading strategy of the speed control system attempts to regulate the temperature of the solid fuel boiler to match the control target that has been set. The control target should be at least 20 F above the minimum temperature of the solid fuel boiler.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Pump type AC, HE

1) 2)

Pump characteristics (only HE) bA, bb, C (see p. 14)

–

Speed control on, oFF

oFF

Minimum speed (only AC) 30 % 100 % 50 % Minimum speed (only HE + bA) 0 % 100 % 25 % Minimum speed (only HE + bb) 0 % 100 % 75 %

Sensor input for storage tank temperature

1 ... 5 –

Sensor input for solid fuel boiler temperature

1 ... 5 –

Switch-on temperature difference T

diff on

diff off

+ 4 F 40 F 12 F

Switch-off temperature difference T

diff off

0 F T

diff on

– 4 F 6 F

unc

SET

max

Max. storage tank temperature 32 °F 300 °F 140 °F

742.110 | 14.50

unc

SET

min

Min. solid fuel boiler temperature 85 °F 200 °F 125 °F

Control target for solid fuel boiler temperature (speed control = on)

32 °F 200 °F 140 °F

Notice

Standard pump: Set AC! High-efficiency pump: Set HE!

Notice

External consumer (e.g. 115 V relay): Set AC pump type and set the speed control to oFF!

10.3.12 Heating return increase

unc

SET

A heating return increase using a three-way valve switches on and off as follows: If the temperature difference between the tank and the heating return exceeds the value T

diff on

, then the three-way valve is switched on (heating

return increase on), until the temperature difference drops below T

diff off

The three-way valve must be connected to output R1.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Sensor input for storage tank temperature

1 ... 5 –

Sensor input for heating return increase temperature

1 ... 5 –

Switch-on temperature difference T

diff on

diff off

+ 4 F 100 F 12 F

Switch-off temperature difference T

diff off

0 F T

diff on

– 4 F 6 F

10.3.13 Thermostat

unc

SET

Switches output R1 on and off, depending on the temperature range of any desired sensor. The function can be time restricted and is set for heating or cooling as follows: Heating: The Ton value is set lower than T

off

. When the sensor temperature drops below Ton, the output is switched on until the temperature exceeds T

off

Cooling: The Ton value is set higher than T

off

. When the sensor temperature exceeds Ton, the output is switched on until the temperature drops below T

off

Time restriction: The function is executed when the current time lies within one of 3 configurable time windows.

Note

The Ton value can be set to the same value as T

off

. However, this setting

has no practical application.

742.110 | 14.50

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Pump type AC, HE

Pump characteristics (only HE) bA, bb, C (see p. 14)

–

Sensor input 1 ... 5 – Switch-on temperature T

32 °F 350 °F 70 °F

Switch-off temperature T

off

32 °F 350 °F 70 °F

Time restriction on, oFF

oFF

Time window 1 start/end Time window 2 start/end Time window 3 start/end

0:00 0:00 0:00

23:59 23:59 23:59

00:00/00:00 00:00/00:00 00:00/00:00

Notice

Standard pump: Set AC! High-efficiency pump: Set HE! External consumer (e.g. 115 V relay): Set AC pump type!

10.3.14 Differential thermostat

unc

SET

off

Switches output R1 on and off as follows – time restricted and depending on the set temperature difference between 2 selectable sensors: When the temperature difference exceeds T

diff on

, the output is switched

on until the temperature difference drops below T

diff off

. In addition to this, the discharging of the heating source can be limited to a particular temperature range (T

src min./Tsrc max.

) and the loading of the heating target

can be limited to a maximum value(T

sink max.

Time restriction: The function is executed when the current time lies within one of 3 configurable time windows.

Speed control of the pump can be activated as required. The loading strategy of the speed control system attempts to regulate the temperature difference to match the switch-on temperature difference that has been set.

Display Characteristic min. max.

Factory setting

Activation on, oFF

oFF

Pump type AC, HE

1) 2)

Pump characteristics (only HE) bA, bb, C (see p. 14)

–

Speed control on, oFF

oFF

Minimum speed (only AC) 30 % 100 % 50 % Minimum speed (only HE + bA) 0 % 100 % 25 % Minimum speed (only HE + bb) 0 % 100 % 75 %

Heat source sensor input 1 ... 5 – Heat sink sensor input 1 ... 5 – Switch-on temperature difference

diff on

diff off

+ 4 F 160 F 12 F

Switch-off temperature difference T

diff off

0 F T

diff on

– 4 F 6 F

742.110 | 14.50

unc

SET

max

Heat source max. temperature T

src max.

src min.

+ 4 F 350 °F 212 °F

unc

SET

min

Heat source min. temperature T

src min.

32 °F T

src max.

– 4 F 32 °F

unc

SET

max

Heat sink max. temperature T

sink max.

32 °F 200 °F 140 °F

Time restriction on, oFF

oFF

Time window 1 start/end Time window 2 start/end Time window 3 start/end

0:00 0:00 0:00

23:59 23:59 23:59

00:00/00:00 00:00/00:00 00:00/00:00

Notice

Standard pump: Set AC! High-efficiency pump: Set HE!

Notice

External consumer (e.g. 115 V relay): Set AC pump type and set the speed control to oFF!

742.110 | 14.50

11 Parameters

Note the following when setting parameters:

• Observe the operating data of the solar components used.

• The individual parameters are only displayed and can be changed when this is per-

mitted by the type of solar system that has been set. Special case: System 0.1 has no parameters, no P is displayed.

• In most applications the controller can be used without modifying any parameters. More information is provided in the Functionality column. The figures in this section show examples.

Display Parameters min. max.

Factory setting

Functionality

ara

SET

max

Maximum temperature storage tank

32 °F 200 °F 140 °F When the maximum tem-

perature is exceeded, no more loading occurs until the temperature drops to 6 F below the set value.

ara

SET

max

Maximum temperature swimming pool

50 °F 115 °F 85 °F When the maximum tem-

perature is exceeded, no more loading occurs until the temperature drops to 1 F below the set value.

ara

SET

Switch-on temperature difference solar circuit

P04

+ 4 F 100 F 16 F When the switch-on tem-

perature difference between collector and storage tank is reached, the storage tank is loaded.

Loading ends when the switch-off temperature difference is reached.

ara

SET

off

Switch-off temperature difference solar circuit

0 F T

P03

– 4 F 8 F

ara

SET

max

Maximum collector temperature

P06

+ 40 F 350 °F 270 °F When the maximum collector

temperature is exceeded, no more loading occurs until the temperature drops to 6 F below the set value.

ara

SET

min

Minimum collector temperature

32 °F T

P05

– 40 F 32 °F Load only starts when the

minimum collector temperature is exceeded.

742.110 | 14.50

Display Parameters min. max.

Factory setting

Functionality

ara

SET

Storage tank loading strategy

dIFF

, AbS

The loading strategy depends on the storage tank system used and the usage of the system. dIFF: Highest efficiency. The control target is the temperature difference between the collector and the storage tank.

AbS: Useful when the system requires particular temperatures, e.g. to avoid switching on the external back-up heating system. The control target is the temperature of the collector.

Control target of dif-

ferential temperature

loading (dIFF)

4 F 100 F 16 F

Control target of

absolute temperature

loading (AbS)

32 °F 200 °F 140 °F

ara

SET

R1 pump type AC, HE

Notice

Danger of malfunctions in the controller or damage to the components. With a high-efficiency pump, HE must be set and with a standard pump AC must be set! Set speed control to oFF when an external relay is connected or speed control is not wanted.

Pump characteristics (only HE)

bA, bb, C (see p. 14) –

Speed control on, oFF

oFF

Minimum speed (only AC)

30 % 100 % 50 %

Minimum speed (only HE + bA)

0 % 100 % 25 %

Minimum speed (only HE + bb)

0 % 100 % 75 %

Tab. 3: Parameters

dIFF is defined as a fixed value for swimming pools.

The factory setting depends on the system that has been set.

The pump speed is adjusted accordingly to achieve the control target.

742.110 | 14.50

12 Dismantling and disposal

Danger

Risk of death by electrocution!

• Disconnect the device from the power supply before opening the casing.

• All work on an open device must be performed by professional personnel.

1. To dismantle the controller, follow the installation instructions in the reverse order; see section 4.

2. Dispose of the device in accordance with the local regulations.

13 Information messages

Display Description

max

The maximum collector temperature has been reached, the solar circuit pump in the respective solar circuit has been switched off. The symbols in the status display flash when the temperature of the respective collector is selected

The maximum collector temperature has been reached, the solar circuit pump in the respective solar circuit has been switched off.

is shown in the status display when the temperature of

the respective collector is not selected.

max

The maximum storage tank temperature has been reached. The symbols in the status display flash when the temperature of the respective collector is selected.

Tab. 4: Information messages

742.110 | 14.50

14 Troubleshooting

Danger

Risk of death by electrocution!

• Immediately disconnect the device from the mains supply when it can no longer be operated safely, e.g. in the case of visible damage.

• Disconnect the device from the mains power before opening the case.

• All work on an open device must be performed by professional personnel.

Notes

The controller is a quality product, conceived for years of continuous trouble-free operation. Observe the following points:

• Faults are often caused by connected components and not by the controller.

• The following notes on fault identification indicate the most common causes of faults.

• Only return the controller when you are absolutely sure that none of the problems

listed below is responsible for the fault.

14.1 General faults

Display Possible cause Remedy

Controller not functioning at all

Display empty/ dark

Controller power supply is interrupted. • Check the controller power

cable.

• Check the fuse for the power supply.

Controller constantly displays 12:00

12 flashes. Controller power supply was interrupted

for longer than 15 minutes.

Set the time.

Solar circuit pump not operating + switch-on condition is fulfilled

Pump power supply is interrupted. Check the pump power cable.

Pump has seized up. Get the pump working again,

replace if necessary.

• The maximum storage tank temperature has been reached.

• The maximum collector temperature has been reached.

• In multi storage tank systems: The system has stopped due to a priority test.

• The minimum collector temperature has not been reached.

• The maximum loading temperature has been reached.

• Stagnation reduction is activated and is actively intervening in the control process.

• The storage tank has been deactivated in the priority settings.

No fault

flashes

Pump has been switched off in manual mode (off)

• No fault

• Switch to automatic mode if

necessary.

742.110 | 14.50

Solar circuit pump not operating + switch-on condition is not fulfilled

• The following functions are activated and are actively intervening in the control process: – Interval function – Holiday function – Freeze recirculation function

• Blockage protection for the pumps is being performed.

• No fault

• Deactivate the relevant func-

tion, if necessary.

flashes

Pump has been switched on in manual mode (on).

• No fault

• Switch to automatic mode if

necessary.

Solar circuit pump is operating + switch-on condition is fulfilled but no heat transport in the solar circuit (no heat transfer fluid circulation)

Air is in the solar circuit. Check the solar circuit for air. The isolating valve is closed. Check the isolating valve. Limescale or contamination in solar circuit Clean the solar circuit (flush).

Solar circuit pump shows cycle behaviour

Temperature difference too small Adjust temperature difference in

the Parameters settings menu.

Collector sensor incorrectly positioned Check the position of the collector

sensor and correct if necessary.

Tab. 5: General faults

14.2 Error messages

When an error message is displayed, the backlighting turns red and starts flashing if no button has been pressed for 5 minutes. The systems shown in the following error messages are only examples.

Error message Description Remedy

An interruption was detected at the displayed sensor input (in this case: sensor input 2).

Check the cable and sensor connected to the sensor input.

A short-circuit was detected at the displayed sensor input (in this case: sensor input 2).

Check the cable and sensor connected to the sensor input.

The controller has detected a flow rate fault. A permanently high temperature difference exists between the heat source and loading target. The solar circuit pump flashes. Possible causes:

• Air in system

• The isolating valve is closed.

• The pump is faulty.

• Bleed air from the

system.

• Check the isolating valve.

• Check the pump.

742.110 | 14.50

The controller has detected faulty operation of the system. This is probably caused by swapped collector connections.

Check the collector connections.

A short-circuit exists at output R1, the pump connected to output R1 flashes. Possible causes:

• The pump is faulty.

• Wiring fault

• Check the pump.

• Check the wiring to R1.

Output R1 is overloaded, the pump connected to output R1 flashes. Cause: The permissible values for R1 specified on the type plate have been permanently exceeded, the output has been switched off.

Check the electrical data of the pump, replace pump if necessary. R1 is automatically switched on again.

Tab. 6: Error messages

14.3 Checking the Pt1000 temperature sensors

Danger

Risk of death by electrocution! Before opening the device, make sure that all cables leading to the device have been disconnected from the mains power and cannot be unintentionally reconnected to the mains power.

1. Remove the terminal cover.

2. Disconnect the temperature sensor.

3. Measure the resistance of the temperature sensor with an ohmmeter and compare with Tab. 7. Small deviations are acceptable.

4. Mount the terminal cover.

Temperature-resistance assignments

Temperature [°F] –22 –4 14 32 50 68 86 104 122 140 158 Temperature [°C] –30 –20 –10 0 10 20 30 40 50 60 70 Resistance[Ω] 882 922 961 1000 1039 1078 1117 1155 1194 1232 1271

Temperature [°F] 176 194 212 230 248 266 284 302 320 338 356 Temperature [°C] 80 90 100 110 120 130 140 150 160 170 180 Resistance[Ω] 1309 1347 1385 1423 1461 1498 1536 1573 1611 1648 1685

Tab. 7: Temperature-resistance assignment with Pt1000 temperature sensors

742.110 | 14.50

15 Technical data

15.1 Controller

Inputs/outputs

Rated voltage (system voltage) 115 ... 230 V~, 50/60 Hz Own consumption ≤0.8W,twoPt1000temperaturesensorsconnected Output R1

Quantity

Type

Switching current

Voltage

1 TRIAC

1.1 (1.1) A each 115 ... 230 V~, 50/60 Hz

Signal inputs/outputs

Signal inputs 1 ... 5

Quantity

Type of signal inputs 1 ... 4

Type of signal input 5

5 Pt1000 (temperature acquisition) Pt1000 (temperature acquisition) or Pulse water meter using 1 gal/pulse, 2 gal/pulse, 5 gal/pulse, 10 gal/pulse, 1 l/pulse, 10 l/pulse, 25 l/pulse (flow rate acquisition)

Signal output 0–10 R1

Type

Min. working resistance

0 ... 10 V

10kΩ

Hydraulic schemes (systems)

Quantity 2

Display

Type LCD display with backlighting

Application conditions

Degree of protection IP22, DIN 40050 [without front panel: IP20] Protection class I Ambient temperature 32 ... +122 °F, when wall-mounted

Physical specifications

Dimensions L x W x H 110 x 160 x 51 mm (4.33 x 6.30 x 2.01 inch) Weight 350 g (0.77 lbs) Software class A Type of action type 1.Y Type of fastening for permanently

connected cables

type X

Degree of pollution 2 Ball pressure test temperature Casing pan: 257 °F

Other casing parts: 167 °F

Overvoltage category class II (2500 V)

Tab. 8: Controller technical data

742.110 | 14.50

15.2 Cable specifications

Mains cable

Mains cable type External diameter of mantle Conductor cross-section

single strand (solid)

fine strand (with core end sleeves)

H05 VV-... (NYM…)

6.5 to 10 mm (0.25 to 0.4 inch)

≤2.5mm

(#AWG 14)

≤1.5mm2 (#AWG 16)

Diameter of the internal strain relief 6.5 to 10 mm (0.25 to 0.4 inch)

Signal cable

Sensor cable length ≤100m(330ft.),includingextension Sensor extension cable

design

cross-section of each conductor

twisted-pair conductors for lengths > 10 m (33 ft.)

0.75 mm

(#AWG 18) for lengths < 50 m (165 ft.)

1.50 mm

(#AWG 16) for lengths > 50 m (165 ft.)

Tab. 9: Cable technical data

16 Exclusion of liability

The manufacturer can neither monitor the compliance with this manual nor the conditions and methods during the installation, operation, usage and maintenance of the controller. Improper installation of the system may result in damage to property and, as a result, to bodily injury. Therefore, the manufacturer assumes no responsibility and liability for loss, damage or costs which result from or are in any way related to incorrect installation, improper operation, incorrect execution of installation work and incorrect usage and maintenance. Similarly, we assume no responsibility for patent right or other right infringements of third parties caused by usage of this controller. The manufacturer reserves the right to make changes to the product, technical data or installation and operating instructions without prior notice.

17 Legal guarantee

In accordance with German statutory regulations, there is a 2-year legal guarantee on this product for the customer. The seller will remove all manufacturing and material faults that occur in the product during the guarantee period and affect the correct functioning of the product. Natural wear and tear does not constitute a malfunction. No legal guarantee can be offered if the fault can be attributed to third parties, unprofessional installation or commissioning, incorrect or negligent handling, improper transport, excessive loading, use of improper equipment, faulty construction work, unsuitable construction location or improper operation or use. Legal guarantee claims shall only be accepted if notification of the fault is provided immediately after it is discovered. Guarantee claims are to be directed to the seller.

The seller must be informed before guarantee claims are processed. For processing a guarantee claim an exact fault description and the invoice / delivery note must be provided.

The seller can choose to fulfil the legal guarantee either by repair or replacement. If the product can neither be repaired nor replaced, or if this does not occur within a suitable period in spite of the specification of an extension period in writing by the customer, the reduction in value caused by the fault shall be replaced, or, if this is not sufficient taking the interests of the end customer into consideration, the contract is cancelled. Any further claims against the seller based on this legal guarantee obligation, in particular claims for damages due to lost profit, loss-of-use or indirect damages are excluded, unless liability is obligatory by law.

742.110 | 14.50

18 Notes

...........................................................................................................................................

742.110 | 14.50

742110

Steca TR-A501T-U Installation And Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual