log boiler 20 - 60 kw configuration · 2019-01-21 en 0000000292 v.005 3.45.0 110, 218, 121p, 219p...

2019-01-21EN0000000292V.0053.45.0110, 218, 121P, 219P93316-002

Log boiler20 - 60 kW

Configuration

ETA Heiztechnik

Gewerbepark 1

A-4716 Hofkirchen an der Trattnach

Tel: +43 (0) 7734 / 22 88 -0

Fax: +43 (0) 7734 / 22 88 -22

[email protected]

www.eta.co.at

Contents

1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Description of the configuration wizard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Checking outputs, changing terminal assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 Changing the access level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Setting manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Modify terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Backing up and restoring a configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.1 Example with oil or gas auxiliary boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.2 Example with solar heating system and stratified charging module . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.3 Resuming commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

6 Configuration parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.1 [Boiler] function block – log boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.2 [BufferFlex] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.2.1 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.2.2 PufferFlex for log boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.2.3 PufferFlex for automatic boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.3 [Heating circuit] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.3.1 Basic settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

6.3.2 Heating circuit with room sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.3.3 Screed drying. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

6.4 [Hot water tank] function block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.5 [Fresh water module] 2 pumps function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

6.6 [Solar] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.7 [Aux.boiler] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

3

General information

1 General information

Copyright

All contents of this document are property of ETAHeiztechnik GmbH and are protected by copyright.Any reproduction, transfer to third parties or use forother purposes is prohibited without written permissionfrom the owner.

Subject to technical changes

We reserve the right to make technical modificationswithout notice. Printing and typesetting errors orchanges of any kind made in the interim are not causefor claims. Individual configurations depicted ordescribed here are only available optionally. In theevent of contradictions between individual documentsregarding delivery scope, the information in our currentprice list applies.

Software Description

The software version described in this documentationcorresponds to the version valid at the time of publica-tion. The software version installed on your productmay differ from that described in this documentation.

A software update to a more recent version canalways be performed. With the appropriate au-

thorisation, the required files can be found at"www.eta.co.at".

Explanation of symbols

Instructions and information

Layout of safety instructions

SIGNAL WORD!

Type and source of danger

Possible effects

• Measures for avoiding the danger

Types of safety instruction

CAUTION!

On non-compliance with this safety instruction, there isa risk of material damage.

WARNING!

On non-compliance with this safety instruction, there isa risk of physical injury.

DANGER!

On non-compliance with this safety instruction, there isa risk of major physical injury.

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Description of the configuration wizard

2 Description of the configuration wizard

Configuration with the wizard

Configuration with the wizard takes place in severalsteps. These are described below:

1) Add the function blocks required for the installedheating system components. Choose your settingsand options individually in each function block.

2) When you have added all the necessary functionblocks, set the individual connections between"producers" and "consumers". "Producers" are components that provide heat orfuel. "Consumers" consume this heat or fuel.

3) Next, the terminal assignments of each functionblock is displayed on the corresponding circuitboard. In this step, the heating systemcomponents are electrically connected. You mayalso adjust the terminal assignments during thisstep.

4) Finally, the configuration is installed, and thesoftware rebooted.

After this, you can make customer-specificadjustments to the heating system, such as: buffercharging times, room temperatures for the heatingcircuit, hot water temperatures, etc.

When you have completed these customer adap-tations, save this configuration. It is saved in the

ETAtouch control system. You can additionally save iton a USB stick.

The description below explains the general wayin which the configuration wizard works. Your

heating system's individual configuration depends onthe installed components, and can vary.

Starting the configuration assistant

In the system configuration , increase the authori-sation to [Service] and open the system configurationmenu with the [Systems configuration] button.

Fig. 2-1: System configuration menu

Start the configuration assistant with the [Startingthe assistant] button.

Function block overview

The [Possible function blocks] column shows thefunction blocks available for selection, and the[Selected function blocks] column shows the functionblocks that have already been added.

Fig. 2-2: Function block overview

1 Function blocks available for selection

2 Type and node number of circuit board

3 Add a function block

4 Function blocks already added

5 Next step of configuration

6 End configuration

7 Delete an added function block

8 Show the options of an added function block

Press the button to see the options and settings foran added function block. With the button functionblocks that have already been added can be deleted.

Adding another function block is quick and uncompli-cated. In this example, the [Heating circuit] functionblock is used to explain the process. Select thefunction block from the [Possible function blocks]column, and then press the button.

5


A window opens showing the function block's settings.Adjustments may be necessary, depending on theinstalled heating system components.

Fig. 2-3: Function block settings

1 Possible selections

2 Display information

3 Show function block options

Press a row to select it. Press the button to see theinformation. Press the [Options] button to view thefunction block options.

Fig. 2-4: Function block options

1 Function block options

2 Show function block settings

3 Save options and settings

Select the required options, depending on yourinstalled heating system components, and save

with the [Accept] button.

The function block has been added and appears in theoverview screen in the [Selected function blocks]column. Add further function blocks in the same way.Continue the configuration by pressing the [Next]button.

Connections overview screen

In this window, you can determine the individualconnections between producers and consumers.

Fig. 2-5: Connections overview screen

1 Overview of created connections

2 Possible producers

3 Possible consumers

4 Delete selected connection

5 Create a new connection

You can create a connection by pressing [New connec-tion]. The choice of possible connections showndepends on the previously selected function blocks,options and settings:

• [Heating water]: For all connections betweenproducers and consumers that are connected viathe heating water.

• [SolarMedium]: For all solar heating system con-nections.

• [Pellets]: For all pellet fuel system connections.

• [Woodchips]: For all wood chip fuel system con-nections.

• [Ash]: For all de-ashing system connections.

• [SH-Twin]: For the connection between log boilersand TWIN pellet burners.

• [Indv. room]: For all individual room control con-nections.

Select the type of connection you require, then tap thenecessary producers and consumers to select them.This connection then appears in the [Connections]window.

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When you have set up all the necessary connections,press [Next] to continue configuration.

Terminal allocation overview screen

The terminal allocations for the individual heatingsystem components are shown in this window.

Fig. 2-6: Terminal allocation overview screen

1 Overview of added function blocks

2 Terminal allocations of individual components ofthe selected function block

All configured function blocks for the individual circuitboards are listed in the [Selected function blocks]window. When you select a function block, its assignedterminal allocation is shown in the window below. Inthis step, the individual components are connected tothe respective terminals on the circuit board.

Once all components have been connected, press the[Next] button to continue configuration.

You can already change the terminal allocationsin this step. The next section explains how to

change the terminal allocation for the temperaturesensor of the hot water tank.

Changing terminal allocation

1. In the function block of the hot water tank, tap thetemperature sensor [Hot water tank] twice. Awindow opens.

Fig. 2-7: Example: Changing terminal allocation

1 Current terminal allocation

2 Available terminals, the factory setting ishighlighted

3 Delete current terminal allocation

4 Allocate new terminal allocation

5 Close window

2. In the upper window, select the terminal and press[Disconnect] to delete the current terminalallocation.

3. After this, select a free terminal in the lowerwindow and allocate the new allocation bypressing [Connect]. Finish by closing the windowwith the [Close] button.

Installing a configuration

Finish by pressing [Apply] to install the configuration.The configuration will then be adopted and thesoftware restarted.

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Changing the access level Checking outputs, changing terminal assignments

3 Checking outputs, changing terminal assignments

3.1 Changing the access level

Authorisation setting [Service]

The [Service] access level is required in order to adjustcertain parameters. To enable this, open the systemconfiguration and tap the [Authorisation] symbol. A settings window appears. Enter thepassword "135" and press [Accept the authorisation] toconfirm.

3.2 Setting manual mode

Switching on an output manually

The terminal assignment of the individual componentsof the selected function block are displayed in theinputs and outputs menu, e.g. pumps, temperaturesensors, and mixers. In this menu, these can beactivated manually (manual mode), for example, tocheck their function. In the example below, the heating circuit pump of theheating circuit is started manually.

The heating circuit pump is started manually

1. Increase the authorisation to [Service]. SeeChapter 3.1 "Changing the access level".

2. Select the heating circuit and change the inputsand outputs in the menu by tapping on the symbol, followed by the symbol. The overviewscreen opens.

Fig. 3-1: Overview

3. In the heating circuit pump, tap on the symbol.A settings window appears. With the [On] button,the pump is turned on manually, and turned off bypressing the [Off] button.

Fig. 3-2: Settings window

4. If the pump is switched on manually, the [On]button will light up yellow to confirm. In addition,the name of the function block is displayed in red.

Fig. 3-3: Manual mode is activated

In manual mode, the [Automatic] button appears. Itis used to switch off manual mode, and automaticmode is again started by the ETAtouch controlsystem. You can close this setting window with thearrow on the left side, even if manual mode is stillactive.

After a period of 30 minutes the ETAtouchcontrol system automatically reverts all

manually switched on outputs back to automaticmode.

In the same manner, the running direction of a mixer ischecked. See the example below.

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Checking outputs, changing terminal assignments Modify terminal assignment

Running direction of the heating circuit mixingvalve

1. With the [Service] authorization, open the inputsand outputs menu in the heating circuit functionblock. On the heating circuit mixing valve, tap the

symbol. The current status and position isdisplayed.

2. The mixer can be opened and closed with the[Forward] and [Back] buttons. Pressing the [Stop]button keeps it in its current position.

3.3 Modify terminal assignment

Modify terminal assignment

The terminal assignment of the individual componentsof the selected function block are displayed in theinputs and outputs menu, e.g. pumps, temperaturesensors, and mixers. In this menu, the terminalassignment can be changed.In the example below, the terminal assignment of theheating circuit pump is changed.

Modify terminal assignment of the heating circuitpump

1. Increase the authorisation to [Service]. SeeChapter 3.1 "Changing the access level".

2. Select the heating circuit and change the inputsand outputs in the menu by tapping on the symbol, followed by the symbol. The overviewscreen opens.

Fig. 3-4: Overview

3. In the heating circuit pump, tap on the symbol.The current terminal assignment is shown in theupper area at [Current terminal assignment].

Fig. 3-5: Terminal allocation overview screen

The current allocation is erased with the button.Next, select a free terminal from the [Availableterminals] list, and assign it using the button.The changed allocation is displayed in the upperarea at [Current terminal assignment].

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Modify terminal assignment Checking outputs, changing terminal assignments

The factory terminal allocation is shown in the[Available terminals] list with a yellow font

colour.

Fig. 3-6: Factory setting (yellow font)

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Backing up and restoring a configuration

4 Backing up and restoring a configuration

Backup configuration

After you have made adjustments to satisfy customerrequirements, you should save the configuration. Thisbackup saves the configuration, parameter settings,input and output terminal allocations, etc. – in otherwords, all relevant data and settings in the ETAtouchcontrol system. This makes it possible to quicklyrestore the original settings.

Backup configuration

1. In the system configuration , increase the au-thorisation to [Service] and open the system con-figuration menu with the [Systems configuration]button.

Fig. 4-1: System configuration menu

2. Press the [Configuration save] button to startthe backup. Once this is finished, a messageappears on the screen prompting an additionalbackup to a USB stick. If you wish to do this, insertthe USB stick into the port on the boiler andperform the backup.

Restoring the configuration

You can restore the heating system configuration atany time. The configuration is restored either from aconfiguration saved in the ETAtouch control system orvia a USB stick. The counter readings are notoverwritten by this.

Control systems in a wall mounted box aresupplied with a USB stick for backing up the con-

figuration. Leave this in the wall mounted box after youhave restored the configuration.

Restoring the configuration

1. In the system configuration , increase the au-thorisation to [Service] and open the system con-figuration menu with the [Systems configuration]

button. To restore a configuration, press the [Con-figuration restore] button. Another menuappears:

Fig. 4-2: Restore menu

2. In the upper part of the screen, select the source ofthe configuration you wish to restore. Then selectthe required backup in the lower part of the screenwith the button.

If the configuration has been loaded from a USBstick, you should additionally back it up in the

ETAtouch control system. To do this, perform thebackup again.

11

Example with oil or gas auxiliary boiler Examples

5 Examples

5.1 Example with oil or gas auxiliary

boiler

Hydraulic schematic

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Examples Example with oil or gas auxiliary boiler

Burner management with changeover valve:With the changeover valve, the buffer storage tank is completely bypassed in burner operation. The consumers aresupplied directly from the burner. The changeover valve is always switched in the direction of the warmest generator(buffer or burner). For this reason, a temperature sensor in the burner is required with this arrangmeent.

Connecting the hot water tank:In this configuration, the hot water tank may not be connected directly to the buffer. As the hot water tank is not hy-draulically separated from the boiler, a zone valve must be used in the return so that the buffer charging pump cannotload the hot water tank accidentally.

The burner cannot serve as a peak load burner in this hydraulic schematic. Simultaneous operation of the boilerand the burner is not possible. There is a separate function block for the control of the changeover valve (from

software version X.43.0).

Circuit board

Function blocks Description

SH-C 0 Boiler Log boiler

SH-C 0 Sys System

Outside temperature sensor

Circuit board


GM-C 0 Heating circuit Heating circuit

Settings:

HC type Underfloor heat.

Room sensor Digital

Options:

Heating circuit pump

Heating circuit mixing valve


Settings:

HC type Radiator heating

Room sensor Digital

Options:



GM-C 0 HWT Hot water tank

Settings:

Charging pump Yes

Circulation pump No

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Example with oil or gas auxiliary boiler Examples

Connections

= type [Heating water]

GM-C 0 BufferFlex Buffer storage tank

Settings:

Temperature sensor number 3

Combination tank No

Consumer levels 1

Solar heating system not present

Start relief for log boiler Yes

GM-C 0 Aux.boiler Automatic auxiliary boiler (such as oil or gas boiler)

Burner sensor

GM-C 0 Changeover valve Diverter valve

Circuit board


Producers Consumers

SH-C 0: Boiler: Flow GM-C 0: BufferFlex: .

GM-C 0: Aux.boiler: Flow GM-C 0: UV: UV input 1

GM-C 0: BufferFlex: Consumer level 1 (top) GM-C 0: UV: UV input 2

GM-C 0: UV: UV flow GM-C 0: HC: .

GM-C 0: HC2: .

GM-C 0: HW: .

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Examples Example with oil or gas auxiliary boiler

Levels in buffer

Levels in buffer Sensor assignment in buffer (from - to)

Boiler/buffer producer

Buffer top Sensor 1 (upper)

Buffer bottom Sensor 3

Start relief

Start relief Sensor 1 (upper)

Consumers


Buffer off Sensor 3

15

Example with solar heating system and stratified charging module Examples

5.2 Example with solar heating

system and stratified charging

module

Hydraulic schematic

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Examples Example with solar heating system and stratified charging module

ETA stratified charging module:The ETA stratified charging module is well suited for the integration of larger solar heating systems or smaller solarheating system into large buffer volumes. The solar energy is sent via the stratified charging valve to the right leveldepending on the temperatures in the buffer. By controlling the speed of both pumps, the ETA stratified chargingmodule adapts perfectly to the current level of sunlight (matched flow), ensuring that the collector temperature canbe maintained just above the required buffer temperature in the optimum efficiency range. All required safety valves(tank safety group) are built-in. Heat exchanger, solar safety group and ball valves are included in the delivery scope.

Technical data of the stratified charging module:1000 l/h on solar side with 3 mWS external pressure loss (collector and piping), up to 20 m² collector in "high flow"for low collector operating temperature with maximum solar yield or up to 40 m² collector in "low flow" for high tem-peratures with maximum tank utilisation. The matchflow regulation takes place on both pumps.

Circuit board


SH-C 0 Boiler Log boiler

SH-C 0 Sys System

Outside temperature sensor

Circuit board



Settings:

HC type Underfloor heat.

Room sensor Digital

Options:




Settings:

HC type Radiator heating

Room sensor Digital

Options:



GM-C 0 BufferFlex Buffer storage tank

Settings:

Temperature sensor number 4

Combination tank No

Consumer levels 2

Solar heating system Heat exchanger with stratified charging

Start relief for log boiler Yes

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Example with solar heating system and stratified charging module Examples

Connections

= type [Heating water]

= type [SolarMedium]

GM-C 0 Aux.boiler Automatic auxiliary boiler (such as oil or gas boiler)

Aux.boiler charging pump

Circuit board


Circuit board


EM-C 1 Solar panel Solar heating system with ETA stratified charging module

Settings:

Tank 1 Heat exchanger with stratified charging valve

Tank 2 not present

Tank 3 not present

Switching tank 1-2 Tank not available

Switching tank 2-3 Tank not available

Circuit board


EM-C 7 FWM 2pumps ETA fresh water module

Producers Consumers

SH-C 0: Boiler: Flow

GM-C 0: Aux.boiler: Flow

GM-C 0: BufferFlex: .

GM-C 0: BufferFlex: Consumer level 1 (top) EM-C 7: FWM: .

GM-C 0: BufferFlex: Consumer level 2 GM-C 0: HC: .

GM-C 0: HC2: .

EM-C 1: Solar: Tank 1 GM-C 0: BufferFlex: Solar

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Examples Example with solar heating system and stratified charging module

Levels in buffer

From temperature sensor 4 in the buffer, the release for the heating circuit is assigned to the second sensor[Sensor 2]. Thus greater thermal energy is available in the buffer for the fresh water module.

Levels in buffer Sensor assignment in buffer (from - to)




Tank temperature

Depending on the connection height of the burner return, the assignment of this temperature sensor

must be changed manually (for example to [Sensor 1 (upper)] or [Sensor 2]).

Sensor 2

Start relief

Start relief Sensor 1 (upper)

Solar producer

Buffer top Sensor 2


Consumer 1 (top)


Buffer off Sensor 2

Consumer 2

Buffer top Sensor 2

Buffer off Sensor 4

19

Resuming commissioning Examples

5.3 Resuming commissioning

Continue heating system commissioning

Continue to commission the heating system andperform a function test of components such as pumps,mixing valves, temperature sensors, etc.

Next, make customer-specific adjustments to thecontrol system such as hot water temperatures, buffercharging time slots, heating time slots and room tem-peratures...The required parameters are listed in Chapter 6 "Con-figuration parameter".

Making a backup after commissioning

Back up the configuration straight away after you haveadapted the heating system to suit the customer's re-quirements. See Chapter 4 "Backing up and restoringa configuration".

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Examples Resuming commissioning

21

[Boiler] function block – log boiler Configuration parameter

6 Configuration parameter

6.1 [Boiler] function block – log

boiler

Parameters to be set

Set or check the following parameters.

Explanation of [Actuators]

The installation side for the air valve actuators needsto be set. The installation side is viewed from theinsulation door towards the rear of the boiler.

Left means that the actuators are installed on theleft side of the boiler.

Explanation of [Lock aux. boiler]

Only set this parameter if the heating system isequipped with an oil or gas auxiliary boiler. Thisparameter determines whether the ETA boiler may bein operation at the same time as the oil or gas auxiliaryboiler.

With the setting [Yes], either the log boiler orburner is in operation. With this setting, you also

need to set the [Locking] parameter to [Yes] in theburner function block.

With the [No] setting, the log boiler and the auxiliary oilor gas boiler can be in operation simultaneously.

Explanation of [MixValve runtime]

This parameter sets the running time for the mixingvalve actuator, the time needed to turn it from theclosed to the fully open position.

Set the running time according to the informationon the mixing valve actuator's type plate.

Explanation of [Charge status max. for start]

Optional: only with automatic ignition

This parameter defines the highest charging status ofthe buffer, so that the automatic ignition of the boiler isallowed to start. If the current charging status is belowthe set value, the ignition of the boiler can start to loadthe buffer. If the current charging status is higher, theignition will be locked.

This prevents that the boiler starts automatically theheating operation, if the buffer requests onlymomentarily heat. Otherwise it´s dangerous if toomuch logs are placed in the boiler, because the heatcan´t dissipate and therefore the safety chain willtrigger.

If 40% is set, the ignition can start only with abuffer charge level of below 40%.

Explanation of [Begin idle time WT cleaning] and[Idle time during WT cleaning]

The [Idle time during WT cleaning] parameter is usedto select the duration of the idle time for heatexchanger de-ashing. The start time for the idle time isset with the [Begin idle time WT cleaning] parameter.

The idle time should be kept as short as possible.

Boiler

Settings

Actuators

Lock aux. boiler

Return

Return riser valve

MixValve runtime

Ignitiona

a. Only displayed with automatic ignition

Charge status max. for start

Heat exchanger cleaningb

b. Only displayed with additional TWIN pellet burner

Begin idle time WT cleaning

Idle time during WT cleaning

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Configuration parameter [BufferFlex] function block

6.2 [BufferFlex] function block

The setting parameters for the buffer aredependent on the boiler

If the buffer is connected to a boiler with anindependent fuel conveying system (automatic boilerssuch as the PelletsUnit, PelletsCompact, HACK, PE-K), it is also possible to set minimum temperatures forthe buffer.

If the buffer is connected to a log boiler (manualheating), fewer settings are possible. That is why thefollowing setting parameters are separated by boiler.

6.2.1 Functional description

Description of the "PufferFlex"

Consumers connected to the buffer often requiredifferent feed temperatures and produce differentreturn temperatures. A hot water tank or a radiatorheating circuit requires a flow of around 60°C, while anunderfloor heating requires one of 35°C. This results indifferent temperature levels for the differentconsumers. The "PufferFlex" function block nowmakes it possible to better utilize these differenttemperature levels (= consumer levels). For this, thecontrol system "separates" the buffer into differentlevels.

The relevant buffer temperature sensors are assignedfor each level (see chapter 6.2.1.2 "Setting levels"). Inthe control system, these are designated as [Sensor 1(upper)], [Sensor 2], [Sensor 3], etc. The order alwayscorresponds from the top of the buffer to the bottom.With this allocation, the control system cananalogously record the "starting" and "stopping" of theload, as well as the heat demand requirements foreach level.

Example: Buffer storage tank with 3 temperaturesensorsA hot water tank (= high feed temperature) and a floorheating circuit (= low feed temperature) are connectedto the buffer.The buffer can therefore be subdividedinto 2 temperature levels for the consumers. The first level (for the hot water tank) is betweentemperature sensors [Sensor 1 (upper)] and [Sensor3].The second level (underfloor heating) is between

[Sensor 2] and [Sensor 3]. For the heat producer (e.g.boiler), the entire temperature level of the buffer isavailable, i.e. from [Sensor 1 (upper)] to [Sensor 3].

Fig. 6-1: Example: Temperature levels at the buffer

1 First consumer level (78°C - 36°C)

2 Second consumer level (59°C - 36°C)

3 Temperature level for the heat producer, e.g. boiler(78°C - 36°C)

Of course, the same principle applies to multipletemperature sensors on the buffer.A maximum of3 consumer levels can be defined, whose ranges mayoverlap.

Fig. 6-2: 3 consumer levels

1 First consumer level (78°C - 44°C)

2 Second consumer level (67°C - 35°C)

3 Third consumer level (35°C - 22°C)

The first consumer level is that for the consumerswith the highest required temperature.The

following consumer levels are for consumers withlower temperatures.

For the control system to function optimally, the actualinstallation height of the individual buffer temperaturesensors must be set in the control system.For moreinformation see 6.2.1.1 "Setting the installation heightof the temperature sensor".

The different levels can also be used to chargethe buffer, and thus also apply to heat producers

(e.g. boiler, solar heating system).For example, buffercharging through the boiler can be restricted to the

23

[BufferFlex] function block Configuration parameter

upper level (e.g. for hot water), and solar heatingsystem charging to the lower level (e.g. for underfloorheating). For more information, see chapter 6.2.1.2"Setting levels".

In addition, the possibility of a warning being issued assoon as an assigned temperature sensor exceeds orfalls below a limit value exists.See chapter 6.2.1.3"Setting warnings".

If additional temperature sensors are retrofitted tothe buffer after commissioning, the installation

heights must also be adapted to these.Similarly, thelabelling of the temperature sensor, and thus therespective assignment, shifts. A review andadjustment of all temperature levels (for producers andconsumers) is then mandatory.

6.2.1.1 Setting the installation height of the temperature sensor

Adjusting the position of the temperature sensor

The actual mounting height of all buffer temperaturesensors is adjusted within the function block.To adjust,open the settings (button ) and press the button

[Sensor positions]. An overview screen opens.

Fig. 6-3: Overview of sensor positions

Use the arrow keys to adjust the actual installationheight of all temperature sensors.The more accuratethe input, the more precise the heat demand determi-nation. Afterwards, close the window using the arrowon the left side.

6.2.1.2 Setting levels

Assigning temperature sensors to the levels

All buffer temperature sensors are assigned in thesettings of the PufferFlex function block.To adjust,open the settings (button ) and press the button

[Sensor assignments].

Fig. 6-4: Overview

Select the desired area (e.g. [Boiler/buffer produc-er]).Use the arrow keys (or tap the settings window) toassign to the respective temperature sensor. This isalso highlighted in colour in the buffer.

Fig. 6-5: Allocation

The temperature sensors for the heat producers (e.g.boiler, additional buffer, etc.) are set in the menu[Boiler/buffer producer] and the temperature sensorsfor the consumers in the menu [Consumer 1 (top)] or[Consumer 2].

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For some temperature sensors (e.g. [Buffer off]), therespective switch-on or switch-off temperature can beset instantly during assignment.

Fig. 6-6: Setting temperature limits

6.2.1.3 Setting warnings

Set temperature warnings

As an option, limit values can be set for two differenttemperature sensors so that a warning is issued if theyare undershot or exceeded. The [Service] access level is required to make modifi-cations. Then open the settings ( button) and pressthe [Sensor assignments] button. In the overview,select [Temperature warning 1] or [Temperaturewarning 2].

Fig. 6-7: Set temperature warnings

If the allocation is set to [no association], thetemperature warning is deactivated.

In the text menu, a delay time can be defined with the[Duration until warning] parameter before the warningappears.

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6.2.2 PufferFlex for log boiler

6.2.2.1 Basic settings

Basic buffer settings for BufferFlex on log boiler

The following parameters apply only to the buffer on alog boiler (without TWIN pellet burner).If the log boiler is equipped with a TWIN pellet burner,the setting parameters are the same as for the bufferwith an automatic boiler. For more information, seechapter 6.2.3.1 "Basic settings".


For a buffer with a solar heating system or as acombination tank, the setting parameters are

identical to the buffer with an automatic boiler. Formore information, see chapter 6.2.3.2 "BufferFlex withsolar heating system" and 6.2.3.3 "BufferFlex as acombination tank".

Explanation of [Total volume]

The whole buffer volume needs to be indicated for thisparameter. This enables the control system to optimisethe charging of the buffer.

Explanation of [Return from consumers]

This temperature is the mean return temperature of allconsumers connected to the buffer. For example:heating circuits, hot water tanks, external heatconsumers fresh, water modules...

This temperature forms the basis for calculating thebuffer charging status. If the buffer is chargeduniformly with this temperature (e.g.: 35 °C), this isequivalent to the charge status "0%".

The average should be set for fluctuating return tem-peratures.

Explanation of [Res.heat difference]

This sets the minimum temperature between the heatproducer (e.g. boiler) and the temperature sensorassigned in the buffer, so that the heat producer maytransfer its residual heat to the buffer. If this differenceis undershot, no more residual heat is fed into thebuffer.

Example: the assigned temperature sensor for theresidual heat is the lowermost buffer sensor and thetemperature here is currently 35 °C.[Res.heat difference]: 8 °C=> The boiler may continue to feed its residual heat tothe buffer until the boiler temperature is at only 43 °C(=35°+8°).

Explanation of [Enable temperature]

This parameter specifies the minimum boilertemperature for charging the buffer when burning logs.Buffer charging can only occur when the boiler hasexceeded this temperature.

Settings

Total volume

Return from consumers

Buffer


Res.heat difference

Enable temperature

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6.2.2.2 BufferFlex with oil or gas auxiliary boiler

Settings for log boiler with PufferFlex andadditional oil and gas auxiliary boiler

If an oil or gas auxiliary boiler is installed, additionalparameters can be set.

Explanation of [Buffer off]

This sets the shutdown temperature for the buffercharge through the boiler. If the temperature sensor inthe buffer has exceeded the shutdown temperature,charging of the buffer by the boiler is stopped.

The value should be at least 5 - 10 °C above theaverage return temperature of the consumers,

but no more than 70 °C. A high shutdown temperaturereduces the number of boiler starts and improvesboiler running time.

Explanation of the [Extra charge] function

This function defines a daily point in time for the buffer(=[Start time]) to charge the buffer additionally. Thischarging is done independently of the actual consumerrequirements and independently of the set timewindows.A separate minimum temperature [Charge buffer minextra] and shutdown temperature [Charge buffer fromextra] can be set for this charge. Charging ends assoon as the buffer reaches these temperatures.

The function is turned on or off with the parameter[Activate time programme?].

To immediately start this additional buffer charge,the [Immediately charge] parameter must be set

to [On].

Explanation of [Desired charging time]

This parameter defines the time required by the boilersto charge the buffer to the required target temperature[Buffer target].

In cascade systems (several boilers charge onebuffer), adjusting this parameter may be helpful

for faster buffer charging. Shortening this time causesother boilers to fire up sooner to help charge the buffer.Lengthening the time would extend the running time ofan individual boiler.


This sets the shutdown temperature for the buffercharge when the consumer is in operation whilerequesting heat from the buffer.

If the temperature sensor in the buffer has exceededthe shutdown temperature, charging of the buffer endsand the buffer is charged.

If several consumer levels are configured, adifferent shutdown temperature can be set for

each level.

Settings

Buffer off

Buffer


Starting after additional criteria

Extra charge

Activate time programme?

Start time

Immediately charge

Charge buffer min extra

Charge buffer from extra

Output regulation

Desired charging time

Consumersa

a. Only visible with a single consumer level

Buffer off

Consumer levelsb

b. Only visible with multiple consumer levels

Consumer 1 (top) (applies also to [Consumer 2] and [Consumer 3])

Buffer off

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6.2.3 PufferFlex for automatic boilers

6.2.3.1 Basic settings

Basic PufferFlex settings

For the basic function of the buffer, the respectivetemperature sensors must be assigned in the buffersettings.Some of the following parameters can also befound in the settings of the PufferFlex [Sensor assign-ments].


Explanation of [Total volume]

The whole buffer volume needs to be indicated for thisparameter. This enables the control system to optimisethe charging of the buffer.

Explanation of [Return from consumers]

This temperature is the mean return temperature of allconsumers connected to the buffer. For example:heating circuits, hot water tanks, external heatconsumers fresh, water modules...

This temperature forms the basis for calculating thebuffer charging status. If the buffer is chargeduniformly with this temperature (e.g.: 35 °C), this isequivalent to the charge status "0%".

The average should be set for fluctuating return tem-peratures.

Explanation of [Buffer min.]

This defines the minimum temperature of the bufferwithin the configured time window at the allocatedtemperature sensor.

The higher this minimum temperature is set, thelarger the heat reserve in the buffer. At the same

time, however, higher temperatures in the bufferreduce the solar yield. This is because the buffer iskept at the minimum temperature using energy fromthe boiler, even if there is no demand from theconsumers.

Settings

Total volume

Return from consumers

Buffer min.

Buffer off

Buffer


Starting after additional criteria

Starting after output

Output via

Extra charge

Activate time programme?

Start time

Immediately charge

Charge buffer min extra

Charge buffer from extra

Res.heat difference

Flow temp raise

Enable temperature

Cascade settingsa

Switching at

Switch-on threshold

Switch-off threshold

Output regulation

Desired charging time

Consumersb

Buffer off

Consumer levelsc


Buffer off

a. Only visible if several heat producers charge the boiler

b. Only visible with a single consumer level

c. Only visible with multiple consumer levels

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The factory setting can remain unchanged as long asall components of the heating system are controlled bythe ETA control system. A higher value is required ifpeaks in output have to be covered or very fast heatavailability is needed.


This sets the shutdown temperature for the buffercharge through the boiler. If the temperature sensor inthe buffer has exceeded the shutdown temperature,charging of the buffer by the boiler is stopped.

The value should be at least 5 - 10 °C above theaverage return temperature of the consumers,

but no more than 70 °C. A high shutdown temperaturereduces the number of boiler starts and improvesboiler running time.

Explanation of [Starting after output]

In most cases, the buffer starts charging as soon asthe temperature sensor has dropped below a minimumlevel. Then the boiler starts and, as soon as this iswarm enough, buffer charging begins. These delaysare usually not noticed.

However, these delays may be disruptive forsystems (e.g. district heating) which have to hold

a certain minimum temperature. Therefore, thisparameter can be set to [Yes] in such cases. Then theboiler starts as soon as the control system calculates arequest on the buffer.

Previously collected control data is used for thiscalculation and adjustable factor [Output via]. If thetotal of the calculated output multiplied with the factor[Output via] is greater than the output of the first boilerto be started, this is switched on for buffer charging.

Example:Boiler output: 200 kW[Output via]: 70%=> If more than 140 kW (200 x 0.7) is calculated, thefirst boiler is started to charge the buffer.

Explanation of the [Extra charge] function

This function defines a daily point in time for the buffer(=[Start time]) to charge the buffer additionally. Thischarging is done independently of the actual consumerrequirements and independently of the set timewindows.A separate minimum temperature [Charge buffer minextra] and shutdown temperature [Charge buffer fromextra] can be set for this charge. Charging ends assoon as the buffer reaches these temperatures.

The function is turned on or off with the parameter[Activate time programme?].

To immediately start this additional buffer charge,the [Immediately charge] parameter must be set

to [On].

Explanation of [Res.heat difference]

This sets the minimum temperature between the heatproducer (e.g. boiler) and the temperature sensorassigned in the buffer, so that the heat producer maytransfer its residual heat to the buffer. If this differenceis undershot, no more residual heat is fed into thebuffer.

Example: the assigned temperature sensor for theresidual heat is the lowermost buffer sensor and thetemperature here is currently 35 °C.[Res.heat difference]: 8 °C=> The boiler may continue to feed its residual heat tothe buffer until the boiler temperature is at only 43 °C(=35°+8°).

Explanation of [Flow temp raise]

The target temperature of the buffer [Buffer target] isincreased by this value when the buffer is demandingheat from the boiler.

This ensures that the boiler temperature is sufficientfor reaching the target temperature in the uppersection of the buffer. As long as the boiler has notreached the target temperature [Boiler tgt.], the boileris operated in the high-output range.

Example: [Buffer target] = 70 °C [Flow temp raise] = 5 °C=> The accumulator tank demands 75 °C from theboiler. The boiler target temperature is therefore 75°C.


This parameter defines the minimum temperature ofthe boiler for charging the buffer. Buffer charging canonly occur when the boiler has exceeded this tempera-ture.

Explanation of [Switching at]

This parameter is used to set the duration for switchingbetween boilers in cascade systems. This serves toensure that the operating period is approximatelyidentical for all boilers.

In order to switch between the individual boilers,all boilers must have the same [Boiler order]

setting.

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Explanation of [Switch-on threshold]

This parameter can only be set if several heatproducers charge the buffer. This parameter makes itpossible to change the threshold for requestinganother heat producer (e.g. second boiler for chargingthe buffer).

Example: 2 boilers with 90 kW output each charge the buffer.The parameter [Switch-on threshold] is set to 100%. => If more than 90 kW (e.g.: 95 kW) is requested, thesecond boiler will be activated in order to produce themissing heat volume (5 kW).

However, if parameter [Switch-on threshold] isset to 110%, it is possible to request a total of 99

kW (=110% of 90 kW) from the buffer withoutactuating the second boiler. This is only activated ifmore than 99 kW is requested.

Explanation of [Switch-off threshold]

This parameter can only be set if several heatproducers charge the buffer. This parameter makes itpossible to change the threshold for swtiching off theadditional heat producer (e.g. second boiler forcharging the buffer).

Example: 2 boilers with 90 kW output each are currentlycharging the buffer. The parameter [Switch-offthreshold] is set to 80%. => If the demand on the boiler falls below 72 kW(=80% of 90 kW), the last activated boiler will beswitched off again.

Explanation of [Desired charging time]

This parameter defines the time required by the boilersto charge the buffer to the required target temperature[Buffer target].

In cascade systems (several boilers charge onebuffer), adjusting this parameter may be helpful

for faster buffer charging. Shortening this time causesother boilers to fire up sooner to help charge the buffer.Lengthening the time would extend the running time ofan individual boiler.


This sets the shutdown temperature for the buffercharge when the consumer is in operation whilerequesting heat from the buffer.

If the temperature sensor in the buffer has exceededthe shutdown temperature, charging of the buffer endsand the buffer is charged.

If several consumer levels are configured, adifferent shutdown temperature can be set for

each level.

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6.2.3.2 BufferFlex with solar heating system

Settings - PufferFlex with solar heating system

In addition to the basic settings, further parametersmust be set for controlling the solar heating system.

Explanation of the [Solar heat diss.] function

Optional: only for several buffer storage tanks andsolar heating system

This function defines whether the selected buffer maytake up excess solar heat from a buffer charged by thesolar heating system.

If you set the function with the [Activate?] parameterset to [Yes], this buffer takes up the solar excess. Thisbuffer is then charged up to the configured maximumtemperature [...until buffer max].

Explanation of [Solar storage strategy]

Various settings can be made for stratified charging ofthe buffer by the solar heating system.

• [Charging by demand]: The current demands of the consumers on thebuffer and the set minimum temperature of thesolar heating system ([Buffer top min. solar]) areused to calculate the temperature required forbuffer charging. The solar heating system will onlybegin to charge the buffer once the collectortemperature is greater than the calculatedtemperature (for charging the buffer).

• [Optimise yield]: The solar heating system will begin to charge thebuffer as soon as the collector temperature isgreater than the current buffer temperature.

• [Charging according to buffer top min. solar]: The solar heating system only begins to charge thebuffer once the collector temperature is greaterthan the set minimum temperature of the solarheating system ([Buffer top min. solar]).

Explanation of [Buffer top min. solar]

Optional: only for solar heating systems with stratifiedcharging

With stratified charging by the solar heating system,this sets a minimum temperature for the top section ofthe buffer. This way, solar charging only takes place inthe top section once the solar panel is at least 7 °Cwarmer than [Buffer top min. solar].

However, this minimum temperature only appliesif the conditions for stratified charging are

satisfied. If they are not, solar charging is switched tothe bottom section of the buffer, to make use of thesolar energy.

Buffer

Solar heat diss.a

Activate?

...until buffer max

Solar producer

Solar storage strategyb

Buffer top min. solarb

Buffer max

Priority bottom

Priority topb

Solar priority

Solar priority

Begin solar prio.

Change priority at

End solar prio.

Min. out. temp. Solar prio.

Consumersc

Extra solar heat

from outside temp.

from accumulator tank temperature

Consumer levelsd


Excess solar heat

from outside temp.

from accumulator tank temperature

a. Only visible with several buffer storage tanks and solar heating system

b. Only visible with stratified charging of the buffer

c. Only visible with a single consumer level

d. Only visible with multiple consumer levels

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Explanation of [Buffer max]

This configurable shutdown temperature sets athreshold for how much the buffer can be charged bythe solar heating system, to prevent the buffer fromoverheating. If the allocated temperature sensorreaches the configured shutdown temperature, thesolar pump of the solar heating system is switched off.

Explanation of [Priority]

Optional: only with solar heating system and bufferwith 2 internal coils

This parameter sets the priority of the top and bottomsections of the buffer for solar charging. A high prioritymeans that this section will be charged by the solarheating system first. A low priority means that it will becharged last.

Function [Solar priority]

Optional: only with solar heating systems

This function is used to allow the solar heating systemconnected to the buffer to charge the buffer storagetank (or combination tank) without firing up the boiler.

For this, 2 time slots are set. During the first time slot(from [Begin solar prio.] to [Change priority at]), theboiler is "locked". This means that the boiler is not firedup to charge the buffer, even if the solar heatingsystem is not delivering enough heat.

During the second time slot (from [Change priority at]to [End solar prio.]), the boiler can be fired up to chargethe buffer if the solar heating system does not supplyany heat for more than 3 minutes.

If the [Solar priority] function is not needed, it canbe switched off at any time.

Explanation of [Begin solar prio.], [Change priorityat] and [End solar prio.]


These parameters are used to set the time slots for the[Solar priority] function.

The first time slot lasts from [Begin solar prio.] to[Change priority at]. The second time slot begins with[Change priority at] and ends with [End solar prio.].

Outside the 2 time slots, the boiler can charge thebuffer at any time.

Set the start of solar priority before the first timewindow of the heating circuit and hot water tank.

Otherwise, the boiler may start beforehand, in order tocharge the heating circuit or hot water tank.

During the configured times for solar priority, itmay happen that the heating circuits or the hot

water are not supplied with sufficient heat.

Explanation of [Extra solar heat]

This parameter indicates whether the buffer is transfer-ring the excess heat from the solar heating system tothe consumers, even if they currently do not need heat. With the [No] display, the buffer will not transfer anyexcess solar heat. If [Yes] is displayed, excess so-lar heat is forwarded.

The following conditions must be met in order forthe excess solar heat to be passed on in this way:

• The current outside temperature must be higherthan the adjustable value [from outside temp.].

• In the function block for the hot water tank, heatingcircuits or other buffer storage tanks, the [Solarheat diss.] parameter must be set to [Yes].

• The following temperatures must be exceeded inthe buffer:

–If the [Buffer] function block is configured, the[Buffer top] temperature must be above theconfigurable value [at buffer top] and the[Buffer bottom Solar] temperature above thevalue [at buffer bottom sol.].

–If the function block [BufferFlex] isconfigured, the temperature [from accumulatortank temperature] at the allocated tempera-ture sensor must be exceeded.

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6.2.3.3 BufferFlex as a combination tank

Settings - PufferFlex as a combination tank

With a combination tank, you need to set additionalparameters for the hot water treatment.

Explanation of [Switch-on diff.]

Optional: only with combination tank

With a combination tank, this parameter regulates howfar the current warm water temperature can fall beforethe hot water tank again demands heat from the boiler.

If the value is set to 15 °C, the current hot watertemperature may drop by 15 °C from the value

[Hot water tank target]. The combination tank does notdemand heat from the boiler unless this happens.

With a combination tank, this value can be set toapproximately 5°C to 8°C if the amount of hot

water is insufficient.

Explanation [Circulation runtime]

Optional: only for circulation pump

This parameter specifies the duration for operating thecirculation pump after it has been started by the controlsystem. Once this time has expired, the circulationpump is switched off for the set duration [Circulationpause].

Example:[Circulation runtime] = 3 minutes[Circulation pause] = 10 minutesIf the circulation pump has been started, it is in

operation for 3 minutes and then disabled for10 minutes. This means that it can only be requestedagain by the control system after 13 minutes.

You can determine the required running time ofthe circulation pump in the following way. Start

the circulation pump in the control system by means ofmanual operation in the inputs and outputs menu. Afterstarting, measure the time until the fresh water modulewarms up the return line for the circulation. This time(e.g. 3 minutes) is required to heat the hot water pipe.Then enter this time in parameter [Circulation runtime]. During this time measurement, no hot water may betapped (e.g. by sink, shower ...), because otherwise anincorrect time is measured.

Explanation [Circulation pause]


This parameter sets the pause after a circulation pumpoperation. The control system can only restart thecirculation pump after this pause/break has expired.

Example:[Circulation runtime] = 3 minutes[Circulation pause] = 10 minutesIf the circulation pump has been started, it is inoperation for 3 minutes and then disabled for10 minutes. This means that it can only be requestedagain by the control system after 13 minutes.

Explanation of [Enable circulation]


This parameter defines the minimum temperature ofthe hot water tank for starting the circulation pump. Thecirculation pump only starts once the hot water tankhas exceeded this temperature.

Buffer

Hot water area

Switch-on diff.

Circulationa

a. Only visible with additional circulation pump

Circulation runtime

Circulation pause

Enable circulation

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[Heating circuit] function block Configuration parameter

6.3 [Heating circuit] function block

6.3.1 Basic settings

Basic heating circuit settings

Set or check this parameter for each installedheating circuit.

Explanation of [HC type]

This defines the type of selected heating circuit, andthe basic settings for the heating curve and themaximum flow temperature are factory-set.

The following types are available for selection:

• [Underfloor heat.]

• [Radiator heating]

• [General]

With the [General] setting, you do not need toperform any basic settings. However, set the

parameters as for [Underfloor heat.], to be on the safeside.

Explanation of [Flow max]

This parameter sets the maximum flow temperature forthe selected heating circuit.

This value is set to 45°C for the [Underfloor heat.]type of heating circuit, and to 65°C for the

[Radiator heating] heating circuit type.

Underfloor heating systems still require a safetythermostat, however.

Explanation of [Off if HeatCurve below]

If the flow temperature calculated using the heatingcurve falls below this value, the heating circuit isswitched off.

The parameter is set to 18°C for underfloorheating systems, and to 24°C for radiators.

Set this parameter higher for heating systemswithout a buffer storage tank.

Explanation of [Flow at -10°C] and [Flow at +10°C]

The two adjustable parameters [Flow at -10°C] and[Flow at +10°C] are used to define the heating curvefor the heating mode.

Based on the current outside temperature , the controlsystem uses the heating curve to calculate thecurrently required flow temperature for the heatingcircuit in heating mode.

Explanation of [Set-back]

These parameters are used to set the parallel shift ofthe heating curve for the heating mode, in order todetermine the heating curve for the reduced powermode.

Only make minor changes to this parameter,because when walls cool down too much, dra-

matically higher air temperatures are required to heatthe room again. Any energy savings will then be lost.

HC type

Heating circuit

Flow max

Off if HeatCurve below

Heating curve

Flow at -10°C

Flow at +10°C

Set-back

Heating load

spec. heating load

Total area

Heating threshold for 'heating'

Heating threshold for 'set-back'

Enable temperature


MixValve runtime

HW priority

Solar heat diss.

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Configuration parameter [Heating circuit] function block

The following figures are a guide, depending on theconfigured temperature [Flow at -10°C] and the designof the heating circuit:

Explanation of [spec. heating load]

This sets the required heat per m² for this heatingcircuit at an outside temperature of -16 °C. Guidelinevalues for heating requirements:

• Passive houses ~10 W/m²

• Energy-saving new constructions ~30 W/m²

• Standard new constructions ~50 W/m²

• Houses built in the 1990s ~70 W/m²

• Older houses (1960-1980) ~110 W/m²

Multiplied by the surface area value [Total area], thisindicates a nominal heating load for this heating circuit,which is used for more precise control.

Set the heating requirement for each installedheating circuit.

Explanation of [Total area]

This parameter indicates the total heated area for thisheating circuit. Multiplied by the heating requirement [spec. heatingload], this indicates a nominal heating load for thisheating circuit, which is used for more precise control.

Set the total area for each installed heatingcircuit.

Explanation of [Heating threshold for 'heating']and [Heating threshold for 'set-back']

The [Heating threshold for 'heating'] and [Heatingthreshold for 'set-back'] parameters are used to set theoutside temperatures that switch off the selectedheating circuit during heating or in set-back mode.


Minimum temperature of the heat producer (buffer orboiler) for enabling the heating circuit pump.

This parameter can be configured for eachheating circuit. This way, you can also determine

which heating circuit is started first and runs thelongest when the buffer is cooling down.

In heating systems without a buffer and the "Pel-letsUnit" boiler, this parameter is not visible.




Explanation of [HW priority]

This parameter specifies whether the hot water tankand the heating circuit can draw heat simultaneously. If the parameter is set to [No], they can both besupplied at the same time. If you choose the setting[Yes], the heating circuit is switched off so that the hotwater can be charged.

With a log boiler, the [Yes] setting makes nosense as the water priority is regulated via a

higher enabling temperature in the heating circuits. Setthe enabling temperature of the heating circuits 5-10°C higher than the enabling temperature of the hotwater tank. When the buffer is cooling off, the heatingcircuits will be shut off first but the hot water willcontinue to be charged.

Explanation of [Solar heat diss.]

This parameter defines whether the selected heatingcircuit may take excess solar heat from the buffer.If these parameters are set to [Yes], this heating circuitwill use the solar surplus. The heating circuit switchesitself on and a heating curve is calculated as if for anoutside temperature of 0°C.

This parameter is factory-set to [No]. You mustcheck the conditions for the [Extra solar heat]

function in the text menu of the accumulator tank.

Temperature Radiators

Flow at -10°C 40 °C 60 °C 80 °C

Set-back 5 - 8°C10-15

°C15-22

°C

Temperature Underfloor heat.

Flow at -10°C 30 °C 40 °C

Set-back 3 °C 5 °C

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[Heating circuit] function block Configuration parameter

6.3.2 Heating circuit with room sensor

Settings - heating circuit with room sensor

In addition to the basic settings, you can set theseparameters for each heating circuit installed with

a room sensor.

Explanation of [Disregard room temperature]

If the room sensor is in an unsuitable position formeasuring the actual room temperature - next to astove, for example - the room sensor can operate at aconstant temperature.

If you set the parameters to [Yes], a roomtemperature of 21 °C is used as the basis.

Explanation of [Child safety]

This locks the buttons on the room sensor. If thisfunction is set to [Yes], neither the temperature nor theoperating condition can be changed any more on theroom sensor.

Explanation of [Calibration value]

If there is a difference between the actual roomtemperature and the temperature displayed on theroom sensor, use this parameter to adjust thisdifference. After this calibration, the room sensor willdisplay the corrected room temperature.

A positive (+) or a negative (-) value can beentered as the corrective value. This value is

added to the currently measured room temperature.

Example:Measured room temperature = 24 °C [Calibration value] = -2 °C => Displayed temperature on room sensor 22 °C

Explanation of [Background lighting]

This sets the brightness of the background lighting forthe room sensor display. The setting 0% turns thebackground lighting off.

Explanation of [Humidity indicator]

This determines whether the currently measured airhumidity in the room is displayed on the room sensoror not.

Explanation of [Room effect]

Optional: only for room sensor

The flow temperature is calculated on the basis of theheating curve and the outside temperature. If the roomtemperature falls by 1°C, the target flow temperature isincreased by this set value. If the room temperaturerises by 1°C, the target flow temperature is decreasedby the set value.

For underfloor and wall heating with a designtemperature of 30 °C, set the room influence to 1

°C; with a design temperature of 40 °C, set it to 2 °C.

Explanation of [Switch-on diff. room] and [Switch-off diff. room]

Optional: only for room sensor

These parameters specify the allowed deviation of theset room temperature for switching the heating circuiton and off.

Example: Room temperature setting = 21 °C[Switch-on diff. room] = 0.5 °C[Switch-off diff. room] = 2 °C=> The heating circuit will be switched off as soon asthe room temperature reaches 23 °C (=21 + 2 °C). Ifthe room temperature falls to 21.5 °C (=21+0.5 °C),heat is supplied to the heating circuit again.

Inputs

Room sensor

Disregard room temperature

Child safety

Calibration value

Background lighting

Humidity indicator

Heating circuit

Room

Room effect

Switch-on diff. room

Switch-off diff. room

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Configuration parameter [Heating circuit] function block

6.3.3 Screed drying

Settings - Screed drying

Set this parameter for each installed heatingcircuit.

Function [Screed]

For each heating circuit, the function block text menucontains the necessary settings for the screed dryingprogram.

With the [Incr. by] and [Incr. every] parameters,you can set the interval for the incremental

increase in the flow temperature (factory setting 3°Cevery 24 hours).If the maximum temperature [Max. temp.] has beenreached, it is held for a period of [Retain max. temp.].This is followed by an incremental reduction in tem-perature. This is configured with the [Set-back by] and[Set-back every] parameters (factory setting 3 °Cevery 24 hours).

Fig. 6-8: Temperature profile of screed drying program

1 [Incr. by]

2 [Incr. every]

3 [Max. temp.]

4 [Retain max. temp.]

Set the start of the drying program with the [Startscreed drying] parameter. If the maximum temperatureis held for the configured duration, the program endsas soon as the [Flow target] temperature is below the[Flow] or the current room temperature.

You may change the calculated targettemperature [Flow target] at any time, in order to

commence heating with a higher temperature, forexample.

Heating circuit

Screed

Start screed drying

Flow target

Last change

Incr. by

Incr. every

Max. temp.

Retain max. temp.

Set-back by

Set-back every

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[Hot water tank] function block Configuration parameter

6.4 [Hot water tank] function block




This parameter regulates how far the current warmwater temperature can fall before the hot water tankagain demands heat from the buffer or boiler.

If the value is set to 15 °C, the current hot watertemperature may drop by 15 °C from the value

[Hot water tank target]. The hot water tank onlydemands heat from the buffer or boiler when thishappens.

Explanation of [HW bottom off]

Optional: only with additional [Hot water tank bottom]temperature sensor

This parameter defines when charging of the hot watertank will end. As soon as the additional [Hot water tankbottom] temperature sensor in the hot water tankreaches the adjustable [HW bottom off] temperature,charging of the hot water tank ends.

Explanation of [Flow temp raise]

The target temperature of the hot water tank [Hot watertank target] is increased by this value and demandedfrom the heat producer.

Example: [Hot water tank target] = 50 °C [Flow temp raise] = 5 °C => 55 °C is demanded from the heat producer.


Minimum temperature of the heat producer (buffer orboiler) for enabling the hot water charging pump. If thebuffer is the heat producer for the hot water tank, thefactory setting is 35 °C. If the boiler is the heatproducer, the setting is 58 °C.

In heating systems without a buffer and with the"PelletsUnit" boiler, this parameter is not visible.

In heating systems without a buffer storage tank, setthis value 5 °C above the minimum return temperature;see the table below.

Explanation of [Register performance]

This parameter indicates the heat capacity of theregister in the hot water tank. The factory setting iscalculated with 70% of the boiler's rated output.Example: Boiler with rated output of 25 kW results ina register output of 17.5 kW.

If the register output of the installed hot water tank isknown, this value must be set. For single familyhomes, this value is usually between 15 and 20 kW.

If the exact register output is not known, use thefollowing estimates for parameter [Register per-

formance]:

• At a rated boiler output of 15 kW, use the ratedboiler output as the register output.

• If the rated boiler output is above 15 kW, select ap-proximately 20 kW.

It is important that this parameter is checked andadjusted because if the value is too high, output

regulation of the boiler or buffer, respectively, will beimpaired.

Hot water tank

Switch-on diff.

HW bottom off

Flow temp raise

Enable temperature

Register performance

Hot water tank max.

Sol. chg. until

Solar heat diss.

Priority

Circulation

Circulation runtime

Circulation pause

Enable circulation

Boiler Value

PelletsCompact 20-32 kW 60 °C

PE-K 32-90 kW 60 °C

HACK 20-200 kW, Fuel: Pellets 60 °C

HACK 20-200 kW, Fuel: Woodchips 65 °C

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Configuration parameter [Hot water tank] function block

Explanation of [Hot water tank max.]

This parameter defines the maximum temperature ofthe hot water tank, and applies to all heat producers -including solar heating systems - that charge the hotwater tank.

The factory setting is 60°C. This should alwaysbe set 5°C above the target temperature of the

tank.

If the hot water tank is charged by a solar heatingsystem, you may increase this value.

Explanation of [Sol. chg. until]


This parameter determines which section of the tankshould be charged up to maximum temperature by thesolar heating system.

If you set it to [Top], the tank is charged until the [Hotwater tank] temperature sensor has reached [Hotwater tank max.].If you choose the setting [Bottom], charging continuesuntil the [Hot water tank bottom] temperature sensorhas reached [Hot water tank max.].

Explanation of [Solar heat diss.]

Optional: only for accumulator tanks with solar heatingsystem

This parameter defines whether the hot water tankmay take excess solar heat from the buffer. If this parameter is set to [Yes], the hot water tank takesthe solar excess up to the maximum temperature [Hotwater tank max.].

This parameter is factory-set to [No]. You mustcheck the conditions for the [Extra solar heat]

function in the text menu of the accumulator tank.

Explanation of [Priority]

Optional: only for solar heating systems withswitchover between several tanks

This parameter sets the priority for solar charging ofthe hot water tank. A high priority means that this tankwill be charged by the solar heating system first. A lowpriority means that it will be charged last.













This parameter defines the minimum temperature ofthe hot water tank for starting the circulation pump. Thecirculation pump only starts once the hot water tankhas exceeded this temperature.

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[Fresh water module] 2 pumps function block Configuration parameter

6.5 [Fresh water module] 2 pumps

function block



Explanation of [Automatic venting]

This function attempts to remove introduced air fromthe fresh water module automatically.If the function is activated and the controller detects airintake, both pumps are operated at full speed for ashort period of time to remove the air from the freshwater module. This can also take place multiple timessequentially.

This function is activated by default. Duringventing, the hot water can briefly be hotter than

the target temperature set.

Explanation of the [Emergency operation only withbuffer pump] function

Emergency operation of the fresh water module can beactivated with this function if the admixing pump isdefective. If it is activated, water heating is only provided by thebuffer pump. Without the admixing pump, calcification

protection of the heat exchangers is not guaranteedProtracted emergency mode can therefore calcify theheat exchanger.

Explanation of the function [Self-learning]

With this function, the operating times of the circulationpump of the last 2 weeks are saved. The operatingtimes of the current day are calculated based on thisand the circulation pump will be put into operation ac-cordingly. This function is also called the "Auto Loop"function.

This function is set to [Yes] by default. If [No] isset, the operating times for the circulation pump

can be set manually.

Explanation of [Flow rate too low]


This parameter determines whether the circulationpump is generating sufficient flow for triggering theflow switch of the fresh water module.

The setting [No] means that sufficient flow isbeing generated.

[Yes] means that insufficient flow is being generated,and the primary pump must therefore be started up aswell.







Hot water

Automatic venting

Emergency operation only with buffer pump

Circulation

Self-learning

Flow rate too low

Circulation runtime

Circulation pause

Enable circulation

Stop diff.

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Configuration parameter [Fresh water module] 2 pumps function block







The circulation pump is put into operation if the current[Buffer top fresh water] temperature exceeds the[Enable circulation] temperature.

Explanation of [Stop diff.]


This defines the difference between the returntemperature to be buffer [Primary return] and the sethot water temperature [Target temp.]. The circulationstops if this difference is fallen short of. Only when theset difference is exceeded by the additional 2 °C canthe circulation restart.

Example:[Stop diff.] = 7 °C[Target temp.] = 50 °C=> the circulation is stopped if the return temperaturerises [Primary return] above 43 °C (=50-7 °C). Thecirculation can restart if the return temperature fallsbelow 41 °C (=50-7-2 °C).

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[Solar] function block Configuration parameter

6.6 [Solar] function block



Explanation of [Speed control]

The speed control needs to be set in order to controlthe solar pump.

Possible selections:

• [On/Off]Output is only switched on (100%) or off (0%).There is no speed control.

• [Pulse packet for NON-EC pumps]Variable speed control for non-electronicallycontrolled standard pumps.

• [Laing/Lowara boiler pump for PU/PC]For pumps of the PelletsUnit and PelletsCompactboiler, made by LAING or LOWARA

• [Heating pump (see info button)]For electronically controlled pumps with heatingcharacteristic curve. This pump runs if the signalcable is unplugged.

The signal cable of this pump can beconnected to the [GM-C2] circuit board or

higher. If this pump is connected to the [GM-C1]circuit board, a 2.2 kiloohm series resistor must beclamped to the signal cable, because the [GM-C1]circuit board has a control voltage of 24 V.

• [Solar pump (see info button)]For electronically controlled pumps with solar char-acteristic curve. This pump will not run if the signalcable is unplugged.

The signal cable of this pump can beconnected to the [GM-C2] circuit board or

higher. If this pump is connected to the [GM-C1]circuit board, a 2.2 kiloohm series resistor must beclamped to the signal cable, because the [GM-C1]circuit board has a control voltage of 24 V.

• [0-10 V analogue]Pump speed is controlled by way of a 0-10 Vsignal.

Explanation of [Collector min]

This parameter sets the minimum temperature forstarting the solar pump. The solar pump can only bestarted once the solar panel has exceeded this tem-perature.

Do not set this temperature too high, to ensurethat it is possible for heat to supplied to pre-heat

the tank even when there is little sunlight. The optimalrange is between 30 °C and 50 °C.

Explanation of [Target collector diff.]

This parameter sets the desired temperaturedifference between the solar panel and the connectedtank (buffer or hot water tank). This temperaturedifference is controlled by adjusting the speed of thesolar pump.

If the buffer is being charged by the solar heatingsystem, the temperature of the solar panel

[Collector] is compared with the buffer temperature[Buffer bottom Solar]. If the hot water tank is beingcharged, the [Hot water tank bottom] temperature iscompared.

A high temperature difference results in a lowspeed of the solar pump. This way, a smaller

quantity of water is conveyed through the solar panel.The water remains in the solar panel for a longer time,and therefore produces a higher working temperaturein the panel. Consequently, a higher hot watertemperature is achieved, but there are also morelosses from the solar panel.

A low temperature difference results in a highspeed of the solar pump. A larger quantity of

water is therefore conveyed through the solar panel.The water remains in the solar panel for a short time,

Outputs

Collector pump

Speed control

State

Collector

Collector min

Collector pump

Target collector diff.

Switch-on diff.

Switch-off diff.

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Configuration parameter [Solar] function block

and so also becomes less hot. The workingtemperature of the solar panel is therefore lower, butthere are fewer losses via the solar panel.


This parameter sets the temperature difference forswitching on the solar pump. If the collector (afterexceeding the minimum temperature) is warmer bythis difference than the tank or area being charged, thesolar pump will be switched on.

Explanation of [Switch-off diff.]

This parameter sets the temperature difference forswitching off the solar pump. If the difference betweenthe panel and the tank or area being charged fallsbelow this value, the solar pump will be switched off.

43

[Aux.boiler] function block Configuration parameter

6.7 [Aux.boiler] function block



Explanation of [Lin y1] and [Lin y2] for auxiliaryboiler's output set point

Optional: only for option [Requested aux. boileroutput].

With this option, the ETAtouch controller specifiesthe required output with an analogue signal (0-

10 V).

The [Lin y1] parameter is used to set the requiredauxiliary boiler output for the weakest signal and [Liny2] is used for the output for the strongest signal.

Explanation of [Rated output]

Set the rated output on the basis of the auxiliaryboiler's type plate.

Explanation of [Locking]

This parameter specifies whether the auxiliary boilerand the ETA boiler may be in operation simultaneously.With the [No] setting, the auxiliary boiler and the ETAboiler may be in operation simultaneously.

With the setting [Yes], the auxiliary boiler will beblocked as soon as the ETA boiler is supplying

heat. With this setting, you also need to set theparameter to [Lock aux. boiler] in the ETA boiler's [Yes]function block.

Explanation of [Min. runtime]

This parameter is used to set the minimum duration forauxiliary boiler operation when the ETAtouch controllerdemands it.

Explanation of [Start lag]

This parameter is used to set the duration of a delay inthe operation of the auxiliary boiler after the ETAcontrol system has demanded it.

If there is still a demand by the ETA control systemafter this period ends, then the auxiliary boiler willbegin operation.

Explanation of [Boiler order]

Optional: only for multiple auxiliary boilers

If more than one auxiliary boiler is installed, the priorityof each of them is set with this parameter. It can begiven a setting from 1 (highest) to 4 (lowest).

Outputs

Target outputa

a. Only visible with option [Requested aux. boiler output].

Lin output

Lin y1

Lin y2

Aux.boiler

Settings

Rated output

Locking

Min. runtime

Start lag

Boiler order

AuxBoilerTemp

AuxBoilerMax

Aux.boiler charging pumpb

b. Only visible with option [Aux.boiler charging pump].

Enable AuxBoilChargePump

Thermostat diff.

Hysteresis

Returnc

Return riser valve

MixValve runtime

c. Only visible with option [Aux.boiler charging pump] and [Return riser valve].

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Configuration parameter [Aux.boiler] function block

The auxiliary boiler with priority 1 is defined as the"main boiler" and will be put into operation first. Theauxiliary boilers with the priorities 2, 3 and 4 are auto-matically put into operation in this order when the mainauxiliary boiler can no longer meet the demands.

Regardless of the priority setting, auxiliary boilersalways have lower priority than an ETA boiler.

Explanation of [AuxBoilerMax]

The maximum temperature of the auxiliary boiler is setwith this parameter. If it exceeds this temperature, itwill be switched off.

Explanation of [Enable AuxBoilChargePump]

Optional: only for [Aux.boiler charging pump]

This parameter is used to set the minimumtemperature of the auxiliary boiler for starting itscharging pump.

Explanation of [Thermostat diff.]


This parameter is used to set the minimum differencebetween the temperature [Tank temperature] of thetank to be charged (buffer or hot water) and thetemperature of the auxiliary boiler [AuxBoilerTemp] forstarting the auxiliary boiler charging pump.

Explanation of [Hysteresis] for auxiliary boilercharging pump


To start the auxiliary boiler charging pump, theauxiliary boiler's temperature must be higher than[Enable AuxBoilChargePump]. At the same time, the[Thermostat diff.] plus the [Hysteresis] must beexceeded with respect to the tank temperature.

Example: [Enable AuxBoilChargePump] = 50 °C[Thermostat diff.] = 5 °C[Hysteresis] = 2 °C=> The auxiliary boiler charging pump will be switchedon as soon as the auxiliary boiler has exceeded theminimum temperature of 50 °C and is also 7 °Cwarmer than the tank that needs charging.

The auxiliary boiler charging pump is switched back offas soon as the auxiliary boiler is cooler than the tanktemperature plus the [Thermostat diff.]. Or if the auxiliary boiler goes below the [Enable Aux-BoilChargePump] minus the [Hysteresis].




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