Samson TROVIS 5474 Mounting And Operating Instructions

Download

Page 1

Automation System 5400 Boiler Controller TROVIS 5474

Electronics from SAMSON

Mounting and Operating Instructions

EB 5474 EN

Firmware version 2.0x Edition July 2004

Page 2

Disclaimer of liability

We areconstantly developing our products and therefore, reservethe right to change the prod uct or the information contained in this document at any time without notice.

We do not assume any liability for the accuracy or completeness of these mounting and operating instructions. Moreover, we do not guaranteethat thebuyer can use the product for an intended purpose. SAMSON rejects any liability for claims by the buyer, especially claims for compensation including lost profits or any other financial loss, except the damage was caused intentionally or by gross negligence. If an essential term of the contract is breached by negligence, SAMSON’s liability is limited to the foreseeable damage.

Safety instructions

The device may only be assembled, started up or operated by trained and

experienced personnel familiar with the product. Proper shipping and appropriate storage are assumed.

The controller has been designed for use in electrical power systems. For

wiring and maintenance, you are required to observe the relevant safety regulations. The Safety shutdown function (section 8.10) does not replace the safety tem-

perature limiter as the boiler controller is not a safety-relevant component.

2 EB 5474 EN

Page 3

Contents

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

1.1 Operating elements. . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.1 Operating keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.2 Operating switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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

1.3 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.4 Displaying data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.5 Setting the controller time . . . . . . . . . . . . . . . . . . . . . . . 11

1.6 Setting the times-of-use . . . . . . . . . . . . . . . . . . . . . . . . 13

1.6.1 Entering vacation periods . . . . . . . . . . . . . . . . . . . . . . . 15

1.6.2 Entering public holidays . . . . . . . . . . . . . . . . . . . . . . . . 16

2 Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.1 Setting the system code number and the boiler rating . . . . . . . . . . 18

2.2 Activating and deactivating functions. . . . . . . . . . . . . . . . . . 19

2.3 Changing parameters . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.4 Enter key number . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.5 Calibrating sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.6 Resetting to default values . . . . . . . . . . . . . . . . . . . . . . . 24

3 Manual operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4 Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5 Boiler functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.1 Boiler switching behavior . . . . . . . . . . . . . . . . . . . . . . . 32

5.2 Lag/lead sequence control. . . . . . . . . . . . . . . . . . . . . . . 34

5.2.1 Control without sensor VFg . . . . . . . . . . . . . . . . . . . . . . 34

5.2.2 Outdoor temperature-dependent sequence . . . . . . . . . . . . . . . 34

5.2.3 Capacity-dependent sequence . . . . . . . . . . . . . . . . . . . . . 35

5.2.4 Sequence lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.2.5 Lag delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.3 Change in lag/lead sequence (Anl 4 to 7) . . . . . . . . . . . . . . . 36

5.3.1 Outdoor temperature-dependent change (Anl 5 and 7) . . . . . . . . . 36

5.3.2 Capacity-dependent change (Anl 5 and 7) . . . . . . . . . . . . . . . 36

5.3.3 Operating hours-dependent change (Anl 5 and 7) . . . . . . . . . . . 37

5.3.4 Change with binary input (Anl 4 to 7) . . . . . . . . . . . . . . . . . 37

5.4 Return flow boost . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.4.1 Common return flow boost . . . . . . . . . . . . . . . . . . . . . . 38

5.5 Parallel operation (Anl 7) . . . . . . . . . . . . . . . . . . . . . . . 38

EB 5474 EN 3

Page 4

Contents

5.6 Operating hours counter. . . . . . . . . . . . . . . . . . . . . . . . 38

5.7 Boiler pump control . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5.8 Boiler sensor acting as a thermostat . . . . . . . . . . . . . . . . . . 39

5.9 Modulation feedback . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.10 Operational alarm . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.11 Return flow sensor acting as a thermostat. . . . . . . . . . . . . . . . 41

6 Functions of the heating circuit . . . . . . . . . . . . . . . . . . . . 42

6.1 Outdoor temperature-dependent advance heating . . . . . . . . . . . 42

6.2 Optimization using a room sensor . . . . . . . . . . . . . . . . . . . 42

7 Functions of the DHW circuit. . . . . . . . . . . . . . . . . . . . . . 44

7.1 DHW heating in the storage tank system (Anl 1 to 3) . . . . . . . . . . 44

7.1.1 Priority circuit (Anl 1 to 3) . . . . . . . . . . . . . . . . . . . . . . . 45

7.2 Forced charging of the DHW storage tank (Anl 1 to 7) . . . . . . . . . 46

7.3 Thermal disinfection (Anl 1 to 3) . . . . . . . . . . . . . . . . . . . . 47

7.4 External DHW demand (Anl 1 to 7) . . . . . . . . . . . . . . . . . . 48

8 System-wide functions . . . . . . . . . . . . . . . . . . . . . . . . 49

8.1 Weather-compensated control . . . . . . . . . . . . . . . . . . . . . 49

8.1.1 Gradient characteristic . . . . . . . . . . . . . . . . . . . . . . . . 50

8.1.2 4-point characteristic . . . . . . . . . . . . . . . . . . . . . . . . . 51

8.2 Fixed set point control . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.3 Differential temperature control using variable weighting factors. . . . . 53

8.4 Deactivation depending on outdoor temperature . . . . . . . . . . . . 53

8.5 Summer mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.6 Delayed outdoor temperature adaptation. . . . . . . . . . . . . . . . 54

8.7 Automatic summer time/winter time changeover . . . . . . . . . . . . 55

8.8 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8.9 Forced operation of the pumps. . . . . . . . . . . . . . . . . . . . . 56

8.10 Flow temperature limitation . . . . . . . . . . . . . . . . . . . . . . 56

8.11 Control mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.11.1 Three-step control . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.11.2 On/off control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.11.3 Continuous control . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8.12 Control signal deactivation. . . . . . . . . . . . . . . . . . . . . . . 59

8.13 Processing of external demand. . . . . . . . . . . . . . . . . . . . . 59

8.14 Feedforwarding the outdoor temperature . . . . . . . . . . . . . . . . 59

8.15 Locking of changed settings . . . . . . . . . . . . . . . . . . . . . . 60

9 Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . . 61

4 EB 5474 EN

Page 5

Contents

9.1 Error list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.2 Sensor failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

9.3 Displaying the lead/collective error alarm . . . . . . . . . . . . . . . 62

9.4 Error status register . . . . . . . . . . . . . . . . . . . . . . . . . . 62

9.5 Error alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.5.1 Sending text message in case of error . . . . . . . . . . . . . . . . . 64

9.5.2 Sending fax in case of a fault alarm . . . . . . . . . . . . . . . . . . 65

10 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

10.1 Controller with RS-232 port . . . . . . . . . . . . . . . . . . . . . . 67

10.2 System bus interface in conjunction with cable converters

RS-232/RS-485 (for four-wire bus) . . . . . . . . . . . . . . . . . . 68

10.3 Description of communication parameters to be adjusted . . . . . . . . 69

10.4 Meter bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . 71

10.4.1 Activating the meter bus . . . . . . . . . . . . . . . . . . . . . . . . 71

10.5 Memory module. . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

11 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

12 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . 76

13 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

13.1 Function block list . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

13.2 Parameter lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

13.3 Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

13.4 Sensor resistance tables . . . . . . . . . . . . . . . . . . . . . . . 115

13.5 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

13.6 Customer data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

EB 5474 EN 5

Page 6

Operation

1 Operation

The controller is ready for use with the temperatures and time schedules preset by the manufac turer. On start-up, the current time and date need to be set at the controller (–> section 1.5).

1.1 Operating elements

The operating controls are located in the front panel of the controller and protected by a Plexi glas door.

1.1.1 Operating keys

Changeover key

(press using a pointed object such as a pen) Switch from the info level to the parameter and configuration level and back

Reset key

(press using a pointed object such as a pen) Press to reset accessible parameters to their default settings; the controller must be in the configuration level

Arrow keys

– To scroll within levels – To change values

Enter key

– To access levels – Access parameters and functions to edit them – Confirm settings – Display set points in the info level

6 EB 5474 EN

Page 7

1.1.2 Operating switches

Mode selector switch

Selector switch

1 1

22O12

Operation

Automatic mode with switchover between day mode and night mode

Automatic mode with switchover between day mode and stand-by mode

Day mode (rated operation) Night mode (reduced operation)

Manual/maintenance mode Stand-by mode

Boiler 1 and 2 in operation; automatic lag/lead sequence change

Boiler 1 in operation, Boiler 2 switched off

Boiler 2 in operation, Boiler 1 switched off

Boiler 1 and 2 switched off Boiler 1 and 2 in operation;

Boiler 2 as lead boiler Boiler 1 and 2 in operation;

Boiler 1 as lead boiler

EB 5474 EN 7

Page 8

Operation

Correction switch for the flow temperature

Set point set-back by 2.5 °C per notch No change in set point Set point raised by 2.5 °C per notch

1.2 Operating modes

Day mode (rated operation)

Regardless ofthe programmed times-of-use and summer mode,the set points relevant for rated operation are used by the controller.

Night mode (reduced operation)

Regardless of the programmed times-of-use and summer mode, the set points relevant for reduced operation are used by the controller.

Stand-by mode

The controller is switched off. The boilers only work when there is a demand for DHW or a demand for an external set point. The protective functions remain active.

Automatic mode

During the programmed times-of-use, the controller works in rated operation. Outside these times-of-use, the controller is in reduced operation or stand-by mode, depending on the set tings. The controller switches automatically between both operating modes.

Maintenance mode

Pumps are controlled manually (–> section 3). Control is not possible. Use the maintenancemode just for maintenance purposes and for emis sion measurements. The default setting of the circulation pumps is set for constant operation.

8 EB 5474 EN

Page 9

1.3 Display

Operation

During operation, the display indicates the current time as well as informationabout the opera tion of the controller. The times-of-use are represented by black squares below the row of num bers at the top of the display. Icons indicate the operating status of the controller.

4 5

1 Automatic operation 2 Rated operation 3 Vacation mode 4 Reduced operation 5 Public holiday mode 6 Summer mode 7 Frost protection

123

1 2

8 Manual/maintenance

mode 9 Malfunction 10 Boiler and boiler stages 11 Valve in control circuit 1

Open: Left arrow

Closed: Right arrow 12 Boiler pump 1 ON

1211 1314

1617181920

11 12 13 14 15

2122

13 Valve in control circuit 2

Open: Left arrow

Closed: Right arrow 14 Boiler pump 2 ON 15 DHW heating

Fig. 1 · Icons

The controller status can be displayed in the operating level (–> section 1.4).

EB 5474 EN 9

Page 10

Operation

1.4 Displaying data

Controller time, measured values, set points and limits, times-of-use, public holidays and vaca tion periods can be retrieved and displayed in th

131). The various levels are listed in section 13.3.

InF1: Boiler 1

InF2: System Anl 1 to 3, Co5 -> Fb13 = ON: Separate heating circuit

4 4 4 4 4

Proceed as follows:

System Anl 4 to 7: Boiler 2 InF3: System Anl 1 to 3, Co5 -> Fb13 = ON: Direct heating circuit InF4: DHW heating InF5: General information, e.g. times-of-use InF8: Error initialization InF9: Modbus and meter bus communication

Select info level. Open info level. Scroll to read the various datapoints of the selected info level that appear one after

the other. Compare the set point/limit with the actual value. Press both arrows keys simultaneously:

Return to the display with time.

e InF1toInF9

info levels (-> Fig. 10 on page

10 EB 5474 EN

Page 11

Operation

1.5 Setting the controller time

The current time and date need to be set immediately after start-up and after a power failure lasting longer than 24 hours. This is indicated by the time blinking on the display.

PA5

The time is set in the

Proceed as follows:

9876543210

parameter level.

242322212019181716151413121110

Switch to the configuration and parameter level. Display:

PA1

9876543210

242322212019181716151413121110

Select PA5 parameter level.

Open PA5 parameter level. Display: Time

Activate editing mode for the controller time.

blinks.

Change time.

9876543210

242322212019181716151413121110

Confirm time. Display: Date (Day-Month)

Activate editing mode for the date.

blinks.

Change date.

EB 5474 EN 11

Page 12

Operation

9876543210

242322212019181716151413121110

Confirm date. Display: Year

Activate editing mode for the controller time.

blinks. Change year. Confirm year.

Exit PA5 parameter level.

Return to the operating level.

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

12 EB 5474 EN

Page 13

Operation

1.6 Setting the times-of-use

Two times-of-use can be set for each day of the week. If only one time-of-use is required, the start and stop times of the second time-of-use must be programmed to identical times.

Parameters

Period/day 1–7 PA5 / 1–7, 1 to 7 Start first time-of-use 7:00 PA5 / 00:00 to 24:00h; in steps of 30 minutes Stop first time-of-use 12:00 PA5 / 00:00 to 24:00h; in steps of 30 minutes Start second time-of-use 12:00 PA5 / 00:00 to 24:00h; in steps of 30 minutes Stop second time-of-use 22:00 PA5 / 00:00 to 24:00h; in steps of 30 minutes

Proceed as follows:

9876543210

242322212019181716151413121110

WE Parameter level / Range of values

Switch to the configuration and parameter level. Display:

PA1

Select PA5 parameter level. Open PA5 parameter level.

Display: Controller time

9876543210

242322212019181716151413121110

Select datapoint for times-of-use. Display:

Activate editing mode for times-of-use. Display: 1–7

Select period/day for which the times-of-use are to be valid: 1–7 = Monday to Sunday, 1 = Monday, 2 = Tuesday, …, 7 = Sunday

EB 5474 EN 13

Page 14

Operation

9876543210

START

242322212019181716151413121110

Activate editing mode for period/day. Display: START; blinks.

Edit start time (steps of 30 minutes).

9876543210

STOP

242322212019181716151413121110

Confirm start time. Display:

STOP

Edit stop time (steps of 30 minutes). Confirm stop time.

Display:

START

The second time-of-use is set like the first time-of-use.

To set the times-of-use for each day, repeat the instructions in the fields highlighted in gray.

Select

End

on the display. Exit the datapoint for times-of-use. Exit the parameter level. Return to the operating level.

Note!

Do notuse the 1–7 menu to check the programmed times-of-use. On openingthis menu, the ti mes-of-use are reset to their default settings.

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

14 EB 5474 EN

Page 15

Operation

1.6.1 Entering vacation periods

When the switch position Automatic operation with switchover between day mode and night mode is selected, night set points (reduced set points) are used by the controller. When the

switch position Automatic operation with switchover between day mode and stand-by mode is selected, the system is switched off. The frost protection function remains active.

A maximum of 10 vacation periods may be entered.

Parameter

Vacation periods – PA5 / 01.01 to 31.12

Proceed as follows: Switch to the parameter and configuration level.

9876543210

242322212019181716151413121110

To enter additional vacations, re-select in the fields highlighted in gray.

Exit the parameter level. Return to the operating level.

WE Parameter level / Range of value

Display:

PA1

Select PA5 parameter level. Open PA5 parameter level. Display: Controller time Select datapoint for vacation period. Display: Open data point for vacation period. Display: If applicable, select

– – – –

START

Activate editing mode for vacation periods.

blinks. Set start date of vacation period. Confirm start date of the vacation period.

Display:

STOP

Set end of vacation period. Confirm end of the vacation period.

––––

(between 31.12 and 01.01) and repeat the steps

Note!

In systems Anl 1 to 3 with integrated DHW heating (Co5 -> Fb13 = ON), the vacations entered also apply to the DHW heating with the setting Co4 -> Fb10 = ON.

EB 5474 EN 15

Page 16

Operation

Vacation periods that are not assigned to a specific date should be deleted by the end of the year so that they are not carried on into the following year.

Deleting vacation periods:

Select the vacation period you wish to delete in the datapoint for vacation periods. Confirm selection. Select

– – – –

Delete vacation period.

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

1.6.2 Entering public holidays

The times-of-use programmed for Sunday apply on public holidays. A maximum of 20 public holidays can be entered.

Parameter

Public holidays – PA5 / 01.01 to 31.12

WE Parameter level / Range of value

Proceed as follows: Switch to the parameter and configuration level.

Display:

PA1

Select PA5 parameter level. Open PA5 parameter level. Display: Controller time

123

1211 1314

1617181920

2122

Select datapoint for public holidays. Display:

Open datapoint for public holidays. Display:

If applicable, select

START

– – – –

Activate editing mode for public holiday.

blinks. Edit public holiday. Confirm public holiday.

16 EB 5474 EN

Page 17

Operation

To enter additional public holidays, re-select

––––

(between 31.12 and 01.01) and repeat the

steps in the fields highlighted in gray.

Exit the parameter level. Return to the operating level.

Note!

In systems Anl 1 to 3 with integrated DHW heating (Co5 ->Fb13 =ON), thepublic holidaysen tered also apply to the DHW heating with the setting Co4 -> Fb10 = ON.

Public holidays that are not assigned to a specific date should be deleted by the end of the year so that they are not carried on into the following year.

Deleting a public holiday:

Select the holiday you wish to delete in the datapoint for public holidays. Confirm selection.

– – – –

Select

Delete the public holiday.

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

EB 5474 EN 17

Page 18

Start-up

2 Start-up

2.1 Setting the system code number and the boiler rating

7 different hydraulic schematics are available. Each system configuration is represented by a system code number (Anl). The different schematics are dealt with in section 4. Available con troller functions are described in sections 5 to 8.

Changing the system code number resets previously adjusted function blocks to their default set tings (WE). Function block parameters and settingsin theparameter level remain unchanged.

The system code number is set in the parameter and configuration level.

Proceed as follows:

Switch to the parameter and configuration level.

level. level.

Anl 1

PA1

Display shows: Select

Anl

Open

Anl

Display: Select system code number (Anl).

System Anl 1 System Anl 2 System Anl 3

System Anl 4

System Anl 5

System Anl 6

System Anl 7

Anl 1

Anl 2

Anl 3

Anl 4

2 1

Anl 5

Anl 6

Anl 7

Confirm system code number (Anl). The burner and stage icons for burner 1 blink. The boiler rating is shown.

18 EB 5474 EN

Single boiler for one-stage burner Single boiler for two-stage burner Single boiler for modulating burner Double boiler for one-stage condensing boiler and

two-stage low-temperature boiler

Double boiler for 2 two-stage burners

Double boiler for modulating and two-stage burner

Double boiler for two modulating burners

Page 19

Start-up

Set the required rating. Set first the capacity of the basic stage and then the total capacity of the burner of two-stage and modulating burners.

Confirm the rating. Set the capacity of the second burner in systems Anl 4 to 7.

End

Select Exit the

Display:

on the display.

Anl

level.

Co1

2.2 Activating and deactivating functions

A function is activated or deactivated in the associated function block. The numbers 0 to 24 in the top row of the display represent the respective function block numbers. When a configura tion level is opened, the activated function blocks are indicated by a black square on the right-hand side below the function block number. The function blocks are described in section 13.2.

The functions are arranged in topic groups:

Co1: Boiler 1

Co2: Systems Anl 1 to 3, Co5 -> Fb13 = ON: separate heating circuit

Systems Anl 4 to 7: Boiler 2

Co3: Systems Anl 1 to 3, Co5 -> Fb13 = ON: direct heating circuit

Co4: DHW heating

Co5: General functions

Co6: Sensor initialization

Co8: Error initialization

Co9: Modbus and meter bus communication

Proceed as follows:

Switch to the parameter and configuration level. Display shows:

Switch to the configuration level (-> Fig. 10, page 131). Open the configuration level.

PA1

EB 5474 EN 19

Page 20

Start-up

Select function block. Activate editing mode for function block.

The function block number starts to blink.

0 0 0 0

If section 2.4).

Activate function block (Fb = ON). An activated function block is indicated by a black square below (right) the function block number in the top row of the controller display.

or:

Deactivate function block (Fb = OFF). Confirm setting.

If the function block is not closed, further function block parameters can be adjusted. Proceed as follows: Make the desired changes and confirm. If applicable, the next function block parameter is displayed. Confirm all parameters to exit the opened function block.

To adjust additional function blocks within the configuration level, repeat the steps in the fields highlighted in gray.

Exit the configuration level. Return to the operating level.

appears on the display, the key number needs to be entered first (refer to

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

20 EB 5474 EN

Page 21

2.3 Changing parameters

Start-up

Depending on the activated functions, not all parameters listed in the parameter list in the Ap pendix (–> section 13.2) might be available.

The parameters are arranged in topic groups:

PA1: Boiler 1

PA2: Systems Anl 1 to 3, Co5 -> Fb13 = ON: separate heating circuit

4 4 4 4

Proceed as follows:

To adjust additional parameters, repeat the steps in the fields highlighted in gray.

Systems Anl 4 to 7: Boiler 2 PA3: Systems Anl 1 to 3, Co5 -> Fb13 = ON: direct heating circuit PA4: DHW heating PA5: General parameters PA9: Modbus and meter bus communication

Switch to the parameter and configuration level. Display: Select parameter level (-> Fig. 10, page 131). Open the parameter level. Select parameter. Activate editing mode for parameter. Change parameter. Confirm parameter setting.

Exit the parameter level. Return to the operating level.

PA1

Note!

The controller automatically returns to the operating level if the keys are left unpressed for two minutes.

EB 5474 EN 21

Page 22

Start-up

2.4 Enter key number

Some functions are protected against unintentional or unauthorized access. These functions can only be activated or deactivated after the valid key number has been entered. The valid key number for initial start-up can be found on page 127. To avoid unauthorized use of the key number, remove the page or make the key number unreadable.

Proceed as follows:

0 0 0 0

The key number remains active for approx. 10 minutes.

blinks on the display. Set valid key number. Confirm key number.

When the correct key number is entered, the function block to be changed blinks on the display. When an incorrect key number is entered, the controller returns to the next configuration level.

2.5 Calibrating sensors

The connected sensors are calibrated in the Co6 configuration level. The following applies:

Co6 -> Fb00 = ON: Pt 100/Pt 1000 sensors mixed (default setting)

Co6 -> Fb00 = OFF: Pt 100/PTC sensors mixed

The resistance values of the sensors can be found on page 115. Each universal input can be configured separately.

The function block parameter includes the following types: Ni 200/1000, PTC, NTC, Pt 100/1000, (0/4 to 20) mA. The function blocks Co6 -> Fb01 to Fb17 correspond to the bi nary inputs BE1 to BE17 in the terminal wiring plan (–> page 78 onwards). Activate the function block for the required sensor and select the function block parameter which matches the type of the input signal.

Note!

Pt 100 orPt 1000 sensor should be used to measure theflow temperature as only these types of sensor are able to measure temperatures reaching up to 160 °C (maximum temperature of the flow temperature set point).

22 EB 5474 EN

Page 23

Start-up

If the temperature values displayed at the controller differ from the actual temperatures, the measured values of all connected sensors can be changed or readjusted. To calibrate a sensor, the currently displayed sensor value must be changed such that it matches the temperature (ref erence temperature) measured directly at the point of measurement.

Perform the calibration in function block Fb23 in Co6.

Proceed as follows:

Switch to the parameter and configuration level. Display:

PA1

Select Co6 configuration level. Open Co6 configuration level. Select function block Fb23. Confirm setting.

Display:

0 0 0 0

Enter currently valid key number. The function block Fb23 blinks on the display.

Activate function block. Confirm setting. Select the function block for the sensor to be calibrated:

The function blocks Co6 -> Fb01 to Fb17 correspond to the binary inputs BE1 to BE17 in the terminal wiring plan (–> page 78 onwards) depending on the selected system code number (Anl), e.g. Co6 -> Fb03 for sensor VFg (all systems).

Activate editing mode for sensor. Fb_ blinks on the display.

Display measured temperature. Activate editing mode for measured temperature.

Measured temperature blinks. Correct measured temperature.

Read the actual temperature directly from the thermometer at the point of measure

ment and enter this value as the reference temperature. Confirm corrected measured temperature.

Additional sensors are calibrated similarly.

EB 5474 EN 23

Page 24

Start-up

Select function block Fb23. Activate editing mode for function block Fb23. Deactivate function block Fb23. Confirm setting. Select

End

on the display. Exit the configuration level. Return to the operating level.

Note! The adjusted sensor values are not reset by the function for resetting to default values.

2.6 Resetting to default values

All parametersand function blocks that can be setwithout entering the key number can bereset to their default settings (WE).

Proceed as follows:

Reset to default settings. Function blocks and parameters are reset to their default settings (WE).

Note!

Resetting protected parameters to their default settings is only possible when the key number is still active. The controller isready foroperation with its default settings. You just need to set the correctdate and current time.

24 EB 5474 EN

Page 25

Manual operation

3 Manual operation

All the settings of the outputs canbe setin the manual mode, see wiring plan(-> section12).

Proceed as follows: Set mode selector switch to .

After approx. 10 seconds the boilers start operation at full capacity. Display:

HAnd

9876543210

242322212019181716151413121110

Select Open the manual level. Display: Select output:

bA: 1, 2 BA1 and BA2 3-Pt: 1, 2 BA3 and BA4, BA5 and BA6

PU: 1, 2 BA7 and BA8 StUF: 1, 2, 3, 4 BA9 to BA12 AnAL: 1, 2 AA 1, 2 (RK1, RK2)

Activate editing mode for output.

The display blinks.

Activate output, increase value.

Three-point stepping output: OPEN

or:

Deactivate output, decrease value.

Three-point stepping output: CLOSED

and:

Three-point stepping output: STOP

Confirm setting. The changed values remain valid as long as the manual mode is active.

Slide mode switch to .

Exit the manual level.

on the display.

bA1

Note! In manual mode, frost protection does not function.

EB 5474 EN 25

Page 26

Systems

4 Systems

7 hydraulic schematics are available.

System code

number (Anl)

1 2 3

5 Double boiler for 2 two-stage burners Change in lag/lead sequence either

6 Double boiler for modulating und

7 Double boiler for two modulating

System description Comments

Single boiler for one-stage burner Single boiler for two-stage burner Single boiler for modulating burner Double boiler for one-stage condensing boiler

and two-stage low-temperature boiler

two-stage burners

burners

Optionally separate heating circuit and DHW heating can be controlled

Lag sequence without automatic lag/lead sequence change

depending on operating hours, on outdoor temperature or boiler capacity

Lag sequence without automatic lag/lead sequence change

Change in lag/lead sequence either depending on operating hours, on outdoor temperature or boiler capacity

26 EB 5474 EN

Page 27

System Anl 1 with Co5 -> Fb13 = OFF

RK1

RüFg

Systems

VFg

KF1

RüF1

Pu1

System Anl 1 with Co5 -> Fb13 = ON

VF2

Pu2

RK2

VFg

RK1

KF1

RüF1

Pu1

RüFg

RüF2

K1 One-stage burner

Pu3

SLP

SF1 SF2

K1 One-stage burner

EB 5474 EN 27

Page 28

Systems

System Anl 2 with Co5 -> Fb13 = OFF

KF1

RüF1 1 2

System Anl 2 with Co5 -> Fb13 = ON

VF2

Pu2

RK2

VFg

Pu1

RK1

RüF2

RüFg

VFg

K1 Two-stage burner

Pu3

28 EB 5474 EN

KF1

RüFg

RK1

Pu1

RüF1

1 2

SLP

SF1 SF2

K1 Two-stage burner

Page 29

System Anl 3 with Co5 -> Fb13 = OFF

Systems

KF1

RüF1

System Anl 3 with Co5 -> Fb13 = ON

VF2

Pu2

RK2

VFg

Pu1

RK1

RüF2

VFg

RüFg

K1 Modulating burner

Pu3

KF1

RüF1

RK1

Pu1

RüFg

SLP

SF1 SF2

K1 Modulating burner

EB 5474 EN 29

Page 30

Systems

System Anl 4

System Anl 5

KF1

VFg

RüFg

RK1 RK2

Pu1 Pu2

RüF1

KF2

RüF2

K1 One-stage condensing boiler

K2 Two-stage low-temperature boiler

VFg

RüFg

30 EB 5474 EN

KF1

RK1 RK2

Pu1 Pu2

1 2

RüF1

KF2

RüF2

K1, K2 Two-stage burner

Page 31

System Anl 6

Systems

KF1

System Anl 7

RK1 RK2

Pu1 Pu2

RüF1

KF2

1 2

RüF2

RüFg

K1 Modulating burner K2 Two-stage burner

RüFg

VFg

KF1

RK1 RK2

Pu1 Pu2

RüF1

KF2

RüF2

K1, K2 Modulating burner

EB 5474 EN 31

Page 32

Boiler functions

5 Boiler functions

5.1 Boiler switching behavior

The

Minimum activation and deactivation time

ters described in following. To be able to keep the cooling off periods between two activation phases, a boiler is first switched on when the time entered in

Minimum deactivation time

activation. To ensurethe burning of residues left over during the start-upphase, a boiler is switched off first after the time entered in

Parameters

Minimum activation time 1 min PA1, PA2* / 0 to 90 min Minimum deactivation time 2 min PA1, PA2* / 0 to 90 min

Minimum activation time

On/off boiler

A boiler is activated when the flow temperature falls below the flow temperature set point by

Hysteresis

the

Lockout time

the

(Fig. 3). After the operational feedback message (burner firing –> section 5.10),

must elapse before the boiler is switched to the next stage. If the flow temperature is expected toreach theset pointrange withinthe to the next stage. A boiler stage is switched off when the flow temperature exceeds theflow temperature set point by the

Hysteresis

Modulating boiler

A boiler starts to operate with its minimum capacity if the flow temperature falls below the flow temperature set point by the firing –>section 5.10), the

Hysteresis

Lockout time

(Fig. 2). After the operational feedback message (burner

troller modulates the boiler capacity to match the actual energy requirement according to the flow temperature set point.

parameters have priority over allother parame

has passed since the last de

has elapsed.

WE Parameter level / Range of values

* Only in systems Anl 4 to 7

Tolerance time

, the boiler doesnot switch

must elapsebefore the modulation is enabled. The con

Parameters

Hysteresis 3 °C PA5 / 1 to 20 °C Tolerance time 30 min PA5 / 0 to 99 min Lockout time 2 min PA5 / 0 to 99 min

WE Parameter level / Range of values

32 EB 5474 EN

Page 33

Flow temperature set point + Hysteresis

Boiler functions

[°C]

Flow temperature set point

Flow temperature set point – Hysteresis

Burner start

Activation of

boiler stage

Fig. 3 · Criteria for switching the boiler stages

tVL[°C]

Flow temperature set point + Hysteresis

Flow temperature set point

Flow temperature set point – Hysteresis

Lockout time

Operational alarm f. burner

t [s]

Tolerance time

t [s]

Burner start

Activation of

boiler stage

Lockout time

Operational alarm f. burner

Fig. 2 · Criteria for switching the modulating boiler

Tolerance time

EB 5474 EN 33

Page 34

Boiler functions

5.2 Lag/lead sequence control

The boilers are released depending on the configuration:

Co1, Co2* -> Fb00 = OFF: Boiler released according to the position of the mode selector

switch Co1, Co2* -> Fb00 = ON: Boiler 1 is not released if binary input BE17 is closed, pro

vided Boiler 1 is not locked by the mode switch. Boiler 2* is released if binary input BE16 is closed, provided Boiler 2 is not locked by the mode switch.

Function

Release of boiler K1, 2 OFF Co1, Co2* -> Fb00

WE Configuration

* Only in systems Anl 4 to 7

5.2.1 Control without sensor VFg

The Burner activation independent from sensor VFg function allows the boiler to be switched on independently from sensor VFg, i.e. exclusively according to boiler sensors VF1 and VF2. Other functions which have an effect on the lag and lead sequence control of the boiler in two-boiler systems do not affect the boiler which works independently any more. On activating the Continuous running of pump function, the boiler pumps react like the pumps of master controller in normal systems.

Functions

Burner activation not dependent on sensor VFg

Continuous running of pump OFF Co5 -> Fb14

WE Configuration OFF Co5 -> Fb20 = ON

5.2.2 Outdoor temperature-dependent sequence

If the outdoor temperature is above the limit entered in just the lead boiler always remains in operation. The lag boiler is not even activated when the maximum capacity of the lead boiler is insufficient to achieve an increased flow temperature. The lag boiler is first released when the outdoor temperature is lower than the limit entered in

Temperature tAfor releasing sequence

The limit entered in short-term demand above the limit can be compensated for without any loss in comfort by pro longing the operating time of the lead boiler. This depends on the performance of the lead boiler.

34 EB 5474 EN

Temperature tAfor releasing sequence

after t = 2 x

Temperature tAfor releasing sequence,

Lockout time

must be selected to ensure that a

Page 35

Boiler functions

Function

Releasing sequence ON Co5 -> Fb07 = ON

Parameters

Lockout time 2 min PA5 / 0 to 99 min Temperature tAfor releasing sequence 12 °C PA5 / –40 to 50 °C

WE Configuration

WE Parameter level / Range of values

5.2.3 Capacity-dependent sequence

The lead boiler is activated when theflow temperaturefalls belowthe flowtemperature setpoint

Hysteresis

by the the second stage. The second boiler is also activated if 90 % of its maximum load is not sufficient over thetime period oft=2x temperature set point and the set point hysteresis is not reached within the tolerance time. The lag boiler is switched off when one of the following conditions is fulfilled:

The current load of both boilers is less than 90 %.

The actualtemperature is greater than the set point and hysteresis added together as wellas

its tendency shows that the temperature willnot fallbelow this total within the tolerance time.

Function

Releasing sequence ON Co5 -> Fb07 = OFF

Parameter

Lockout time 2 min PA5 / 0 to 99 min

. In the event of a demand for increased capacity, the lead boiler switches to

Lockout time

to increasethe flow temperature to therequired flow

WE Configuration

WE Parameter level / Range of values

5.2.4 Sequence lock

The binary input BE11 is used to lock the sequence. The input of the outdoor temperature is de termined by the binary input. The outdoor sensor is not required.

Function

Outdoor sensor ON Co5 -> Fb00 = OFF, select: FoAUS

WE Configuration

5.2.5 Lag delay

The

Lag delay

mands. The second boiler is first switched on when required after the time in elapsed. The time countdown is shown in the InF5 level.

parameter helps minimize losses during start-up in the event of short-term de

Lag delay

EB 5474 EN 35

has

Page 36

Boiler functions

Parameter

Lag delay 10 min PA5 / 0 to 90 min

WE Parameter level / Range of values

5.3 Change in lag/lead sequence (Anl 4 to 7)

The lag/lead sequence can be changed depending on the outdoor temperature, operating hours or capacity. The change in lag/lead sequence is only effective when the mode selector switch is set to and with the configuration Co5 -> Fb20 = OFF.

Note!

A change in lag/lead always takes place when the controller detects a fault in the lead boiler regardless of the configuration.

5.3.1 Outdoor temperature-dependent change (Anl 5 and 7)

The outdoor temperature-dependent change in lag/lead sequence is only appropriate when boilers with varying capacity are used. The lead boiler is determined by comparing the mean outdoor temperature overthree dayswith

Reverse sequence limit t

the

Outdoor temperature >

boiler is the boiler with the smallest unit capacity Outdoor temperature <

boiler is the boiler with the largest unit capacity

Functions

Automatic change in lag/lead sequence ON Co5 -> Fb09 = ON Condition for change in lag/lead sequence ON Co5 -> Fb10 = OFF, select: 1

Parameter

Outdoor temperature limit for lag/lead sequence change

parameter:

Outdoor temperature limit for lag/lead sequence change

WE Configuration

WE Parameter level / Range of values 15 °C PA5 / –40 to 50 °C

: Lead

5.3.2 Capacity-dependent change (Anl 5 and 7)

The lead boiler is the boiler which had the lowest average capacity over the past three days.

Functions

Automatic change in lag/lead sequence ON Co5 -> Fb09 = ON

36 EB 5474 EN

WE Configuration

Page 37

Boiler functions

Condition for change in lag/lead sequence ON Co5 -> Fb10 = OFF, select: 2

5.3.3 Operating hours-dependent change (Anl 5 and 7)

After a fixed amount of time haselapsed, countingin hoursfrom the time when the last lag/lead sequence tookplace ( role as lead boiler. The elapsed operating hours since the last change in lag/lead sequence are shown in the InF5 level.

Functions

Automatic change in lag/lead sequence ON Co5 -> Fb09 = ON Condition for change in lag/lead sequence ON Co5 -> Fb10 = ON

Parameter

Time interval for lag/lead sequence change 168 h PA5 / 1 to 999 h

Time intervalfor lag/lead sequence change)

WE Configuration

WE Parameter level / Range of values

, theother boiler takes on the

5.3.4 Change with binary input (Anl 4 to 7)

The binary input BE4 can be used for the change in lag/lead sequence when the DHW heating is not being controlled:

BE4 = OFF: Boiler 1 as lead boiler

BE4 = ON: Boiler 2 as lead boiler

Functions

DHW demand – active ON Co4 -> Fb00 = OFF Automatic change in lag/lead sequence OFF Co5 -> Fb09 = OFF

WE Configuration

Note!

In system Anl 7 the binary input BE4 can be used either for modulation feedback, for an exter nal demand for DHW or for an external change in lag/lead sequence.

5.4 Return flow boost

On fulfilling the criteria for activation (–> section 5.1) the return flow control circuit is closed at the valve RK1/RK2. In the released boiler K1/K2 (see above), the first stage of the boiler and the boiler pump Pu1/Pu2 is switched on. The water is circulated in the boiler circuit. The return control circuit is released if the temperature at the sensor RüF1/RüF2 exceeds the limit entered in

Minimum return flow temperature.

The mixing valve opens and release the cor

EB 5474 EN 37

Page 38

Boiler functions

responding flow rateto theplant untilthe valve is completely opened and the boiler pump deliv ers the maximum flow rate in the plant.

Parameter

Minimum return flow temperature 50 °C PA1, PA2* / 20 to 120 °C

WE Parameter level / Range of values

* Only in systems Anl 4 to 7

Depending on the configuration, the return flow boost can be controlled with a continuous signal, on/off signal or three-point stepping signal (–> section 8.11).

5.4.1 Common return flow boost

In systems with two boilers (systems Anl 4, 5, 6 and 7), a common return flow boost can be im plemented. This is done by using the return flow control circuit of the first boiler K1, depending on whether the boiler is in operation.

Function

Common return flow boost OFF Co5 -> Fb12 = ON

WE Configuration

5.5 Parallel operation (Anl 7)

This function leads to both boilers working constantly in parallel (no lag/lead sequence control). The boilersstart operatingone after the other, taking into account the programmed times:

and

mum deactivation time for boiler K1, 2

for releasing sequence

ture t

Function

Parallel operation of boilers OFF Co5 -> Fb19 = ON

Parameters

Minimum deactivation time f. boiler K1, 2 0 min PA1, 2 / 0 to 90 min Lag delay 10 min PA5 / 0 to 90 min Temperature tAfor releasing sequence 12 °C PA5 / –40 to 50 °C

Lag delay

WE Configuration

WE Parameter level / Range of values

as well as taking into account

Mini-

Tempera-

5.6 Operating hours counter

This function allows the performed operating hours of boilers K1, 2 to be shown in the Inf1, 2 levels. The control is not affected by the counted operating hours. If the operating hours should be selected to start at a certain initial value, this can be programmed separately.

38 EB 5474 EN

Page 39

Boiler functions

Function

Operating hours counter OFF

WE Configuration

Co1, Co2* -> Fb02 = ON

0 h

Initial value / Configurable as required count Counting the operating hours rESEt Reset operating hours to initial value

* Only in systems Anl 4 to 7

5.7 Boiler pump control

The boiler pump control is connected with the boiler control loop. When a boiler is switched on to the first stage, the associated boiler pump is also switched on. When the boiler is switched off, the boiler is switched off too either after the elapsed or when the temperature falls below

Boiler flow limit

Pump lag time

In summer mode, the boiler pump is switched off together with the boiler when the deactivation criteria are fulfilled.

In systems without hydraulic separator, in which the heating water must be circulated through the boiler, the boiler pump may notbe switchedoff. For this purpose, the Continuous running of pump function is activated. The boiler pump continues to run when the lead boiler is switched off and the valve is opened. As a result, the cold system water can reach the boiler return flow pipe. If the return flow temperature is a factor that needs to be monitored in theboiler, theinstallation of an hydraulic separator is recommended.

Function

Continuous running of pump OFF

WE Configuration

Co5 -> Fb14 = ON

5 min

Pump lag time / 0 to 90 min

55 °C

Boiler flow limit / 20 to 120 °C

has

5.8 Boiler sensor acting as a thermostat

The boiler sensors KF1 and KF2 control the safety deactivation (–> section 8.10), which is trig gered whenever the maximum flow temperature is exceeded, as well as the temperature-de pendent pump lag of the boiler pumps Pu1 and Pu2 (–> section 5.7). The maximum permissible flow temperature can also be monitored in systems Anl 4, 5 and 6 with thermostats. The inputs of the boiler sensors must be defined as binary inputs for this pur pose. The thermostats are connected to the same terminals as the boiler sensors.

EB 5474 EN 39

Page 40

Boiler functions

Function

Boiler sensor KF1, 2 ON Co1, Co2* -> Fb03 = OFF

WE Configuration

StEiG: Thermostat closes FALL: Thermostat opens

*Only in systems Anl 4 to 7

5.9 Modulation feedback

The modulation feedback in systems Anl 3, 6 and 7 can be implemented by a potentiometer (1 to 2 kΩ) or by a limit switch for maximum boiler capacity output.

Modulation feedback with potentiometer

The inputsfor the potentiometer are marked in thewiring diagrams (–> section 12) with SG_K1 (potentiometer 1) and with SG_K2 (potentiometer 2).

Function

Modulation feedback K1, 2 ON Co1, Co2* -> Fb07 = ON

WE Configuration

* Only in system Anl 7

Note!

In system Anl 7, the binary input BE4 can be used either for modulation feedback, for external DHW demand or for external change in lag/lead sequence.

5.10 Operational alarm

The boiler controller waits for an operational alarm before it continues (–> section 5.1). The operational alarm can optionally be issued over a binary input or after fixed time entered in

Start-up time for boiler

parameter.

40 EB 5474 EN

Page 41

Boiler functions

Operational alarm over a binary input

The inputs for the operational alarm are marked in the wiring diagrams (section 12) with BE2 BM_K1 for Boiler 1 and with BE1 BM_K2 for Boiler 2.

Function

Operational alarm K1, 2 ON Co1, Co2* -> Fb01 = ON

WE Configuration

* Only in systems Anl 4 to 7

Operational alarm after start-up

Function

Operational alarm K1, 2 ON

WE Configuration

Co1, Co2* -> Fb01 = OFF

0 s

Start-up time for boiler / 0 to 5400 s

* Only in systems Anl 4 to 7

5.11 Return flow sensor acting as a thermostat

The return flow sensors can optionally be replaced by thermostats. For this purpose, the inputs for the return flow sensors are defined as binary inputs. The thermostats are connected to the same terminals as the return flow sensors.

Function

Return flow sensor RüF1, 2 ON Co1, Co2* -> Fb04 = OFF

WE Configuration

StEiG: Thermostat closes FALL: Thermostat opens

* Only in systems Anl 4 to 7

EB 5474 EN 41

Page 42

Functions of the heating circuit

6 Functions of the heating circuit

6.1 Outdoor temperature-dependent advance heating

Only selectable for systems Anl 1 to 3 with Co5 -> Fb13 = ON. The controller switchesthe heatingon beforethe time-of-use starts in normal operation depend ing onthe outdoor temperature. The of –12 °C. The advance heating time is shortened in case of higher outdoor temperatures.

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON Optimization OFF

Outdoor sensor ON Co5 -> Fb00 = ON

Advance heatingtime

WE Configuration

Co3 -> Fb05 = ON,

120 min

Advance heating time / 0 to 360 min

is basedon an outdoor temperature

select: 1

6.2 Optimization using a room sensor

Only selectable for systems Anl 1 to 3 with Co5 -> Fb13 = ON. Both thefunctions describedshould only be used if the room in which theroom sensor is located (reference room) has a heating characteristic that is similar to the rest of the building. No thermostat valves should be mounted on the radiators in the reference room.

There are two types of optimization depending on the activation conditions:

Outdoor temperature-dependent advance heating, room temperature-dependent deacti-

vation

The controller activates the heating depending on the outdoor temperature before the time-of-use starts in normal operation. The temperature of –12 °C. The advance heating time is shorter whenthe outdoortemperature is higher (see section 6.1).

Room temperature-dependent advance heating and deactivation

The controller calculates the required advance heating time (max. 6 hours) adapted to the building characteristics, resulting in the reached in the reference room when the time-of-use starts. The heating is heated with the maximum flowtemperature duringthe advance heating phase. As soon as the is reached, outdoor temperature-dependent control starts.

Advance heating time

Day set point

(rated room temperature) being

is based on an outdoor

Day setpoint

The controllerdeactivates the heating in both types of optimization dependingon the room sen sors up to two hours before the time-of-use finishes.

The controller chooses the deactivation time such in a way that the room temperature does not drop significantly below the desired temperature until the time-of-use ends.

42 EB 5474 EN

Page 43

Functions of the heating circuit

Outside the times-of-use, the controller monitors the

Sustained temperature

or the

in the case of room temperature-dependent deactivation. When

Night set point

(reduced room temperature)

the temperature falls below the night set point, the controller heats with the max. flow tempera ture until the measured room temperature exceeds the adjusted value by 1 °C.

Note!

Direct sunshine can cause theroom temperatureto increaseand thusresult inthe prematurede activation of the heating system. A drop in room temperature within a brief period outside of the time-of-use may lead to the ad vance heating to reach the room temperature being activated too early.

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON Room sensor OFF Co3 -> Fb00 = ON

Outdoor temperature-dependent advance heating, room temperature-dependent deactivation:

Optimization OFF

Outdoor sensor AF1 to 3 ON Co5 -> Fb00 = ON

Room temperature-dependent advance heating and deactivation:

Optimization OFF

Parameter

Day set point 20 °C PA3 / 10 to 40 °C Night set point 17 °C PA3 / 10 to 40 °C Sustained temperature 10 °C PA3 / 10 to 40 °C

WE Configuration

Co3 -> Fb05 = ON,

120 min

WE Parameter level / Range of values

Advance heating time / 0 to 360 min

Co3 -> Fb05 = ON,

select: 2

select: 3

EB 5474 EN 43

Page 44

Functions of the DHW circuit

7 Functions of the DHW circuit

Only systems Anl 1 to 3 have their own DHW heating (DHW heating in storage system with Co5 -> Fb13 = ON). The systems Anl 4 to 7 do not have their own DHW heating; they are, however, able to process an external DHW demand (-> section 7.4) and to reduce an excessively high flow temperature over a DHW forced charging in the external system (-> section 7.2).

7.1 DHW heating in the storage tank system (Anl 1 to 3)

SLP

Fig. 4 · DHW heating in a storage tank system

SF1

SF2

SLP Storage tank charging pump SF1 Storage tank sensor 1 SF2 Storage tank sensor 2 ZP Circulation pump WW Hot water KW Cold water

Operation with storage tank sensor SF1

The controller begins charging the storage tank when the water temperature measured at sensor SF1 falls below the set point

DHW demand ON

. The controller stops charging the storage

tank when the water temperature in the storage tank measured at sensor SF1 reaches the value

DHW demand ON+Hysteresis

T = The set point

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON Storage tank sensor SF1 OFF Co4 -> Fb03 = ON Storage tank sensor SF2 OFF Co4 -> Fb04 = OFF

Parameters

Boiler set point for DHW demand 65 °C PA4 / 20 to 120 °C DHW demand ON 40 °C PA4 / 20 to 90 °C Hysteresis 5 °C PA4 / 0 to 30 °C

Boiler set point for DHW demand

determines the set point at sensor VFg.

WE Configuration

WE Parameter level / Range of values

44 EB 5474 EN

Page 45

Functions of the DHW circuit

Operation with two storage tank sensors SF1 and SF2

The controller begins charging the storage tank when the water temperature measured at sen sor SF1 falls below the set point

DHW demand ON

. The controller stops charging the storage

tank when the water temperature in the storage tank measured at sensor SF2 reaches the value

DHW demand OFF

The set point

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON Storage tank sensor SF1 OFF Co4 -> Fb03 = ON Storage tank sensor SF2 OFF Co4 -> Fb04 = ON

Parameters

Boiler set point for DHW demand 65 °C PA4 / 20 to 120 °C DHW demand ON 40 °C PA4 / 20 to 90 °C DHW demand OFF 45 °C PA4 / 20 to 90 °C

Boiler set point for DHW demand

WE Configuration

WE Parameter level / Range of values

determines the set point at sensor VFg.

Operation with storage tank thermostat

The storage tank thermostat is connected to SF1 and switches the storage tank charging on and off. The set point

Functions

Heating circuit with DHW heating OFF Co4 -> Fb13 = ON Storage tank sensor SF1 OFF Co4 -> Fb03 = OFF Storage tank sensor SF2 OFF Co4 -> Fb04 = OFF

Parameter

Boiler set point for DHW demand 65 °C PA4 / 20 to 120 °C

Boiler set point for DHW demand

must still be predetermined.

WE Configuration

WE Parameter level / Range of values

7.1.1 Priority circuit (Anl 1 to 3)

The DHW heating can be switched with priority over the separate heating circuit 2 or directly over the heating circuit (heating circuit 3, Pu3).

Heating circuit 2: During the storage tank charging, the separateheating circuit2 is placed in reduced operation.

EB 5474 EN 45

Page 46

Functions of the DHW circuit

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON DHW priority over HK2 OFF Co4 -> Fb06 = ON

WE Configuration

Heating circuit 3:

During the storage tank charging, the direct heating circuit is switched off. The separate heating circuit runs in parallel.

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON DHW priority over HK3 OFF Co4 -> Fb07 = ON

WE Configuration

Note!

When the DHW priority over HK3 function is deactivated, the direct heating circuit also runs in parallel to the DHW charging. The heating circuit may, however, only be overheated by 10 °C . In other words, the heating circuit is supplied with not enough heat when the boiler set point for the heating circuit is greater than

Boiler set point for DHW demand

off during storage tank charging when the

Boiler set point for DHWdemand

. The heating circuit is switched

is 10 °C higher than

the boiler set point.

7.2 Forced charging of the DHW storage tank (Anl 1 to 7)

A forced charging of the DHW storage tank can prevent that the safety equipment place the boiler out of operation in case of excessively high flow temperature. The forced charging of the DHW storage tank takes place when the

forced charging

is exceeded at the flow sensor together with sensor VFg or at one of the two boiler sensors KF1 or KF2. In systems without their own DHW heating (systems Anl 4 to 7) the demand for a forced charg ing is passed on to the connected controllers atbinary outputBA1. The actual forced charging is started by the controllers that are responsible for the DHW heating.

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON* Forced charging of DHW storage

tank

WE Configuration

OFF

Co4 -> Fb02 = ON

80 °C

Maximum limit f. DHW forced charging/20 to 120 °C

* Not in systems Anl 4 to 7

Maximum limit for DHW

46 EB 5474 EN

Page 47

Functions of the DHW circuit

7.3 Thermal disinfection (Anl 1 to 3)

In all systems with DHW heating, the DHW storage tank is thermally disinfected on the selected

Day of week

The charging temperature is always 5 °C higher than the Thermal disinfection starts at the adjusted

Disinfection temperature

the display. The error alarm is automatically reset when the during the next thermal disinfection.

Thermal disinfection for preventing legionella infection causes

high return flow temperatures during the disinfection cycle (return flow temperature limita

tion suspended), high storage tank temperatures after thermal disinfection has been concluded,

lime scale (possibly), which can have a negative effect on heat exchanger performance.

Note!

This function is not available when a storage tank thermostat is used.

or daily. The storage tank is heated up to the adjusted

Disinfection temperature

Start time

is not reached at the end of thermal disinfection, blinks on the

and finishes at the

Disinfection temperature

Stop time

at the latest. If

is reached

Functions

Heating circuit with DHW heating OFF Co5 -> Fb13 = ON Storage tank sensor SF1 OFF Co5 -> Fb03 = ON Thermal disinfection OFF

WE Configuration

Co4 -> Fb08 = ON Day of week / 0, 1 to 7 (daily, Mon to Sun)

Disinfection temperature / 50 to 80 °C

70 °C

Start time / 00:00 to 23:59 h

00:00

Stop time / 00:00 to 23:59 h

04:00

EB 5474 EN 47

Page 48

Functions of the DHW circuit

7.4 External DHW demand (Anl 1 to 7)

This function allows the boiler controller to switch over to the

Boiler set point for DHW demand

when the binary input BE4 (WWA) is closed. The thermal disinfection has priority when the ex ternal DHW demand and thermal disinfection coincide.

Functions

Modulation feedback K2 ON Co2 -> Fb07 = OFF DHW demand – active ON Co4 -> Fb00 = ON

Parameter

Boiler set point for DHW demand 65 °C PA4 / 20 to 120 °C

WE Configuration

WE Parameter level / Range of values

Note!

In system Anl 7, the binary input BE4 can be used either for modulation feedback, for external DHW demand or for external change in lag/lead sequence.

48 EB 5474 EN

Page 49

System-wide functions

8 System-wide functions

8.1 Weather-compensated control

When weather-compensated control is used, the flow temperature is controlled according to the outdoor temperature. The boiler characteristic in the controller defines the flow temperature set point as a function of the outdoor temperature (–> Fig. 5). The outdoor temperature required for weather-compensated control is measured at the outdoor sensor at the input AF or received over a 0 to 10 V signal at the input AE2.

[

C] t

130

120

110

100

20 16 12 8 4 0 -4 -8 -12 -16 -20

Fig. 5 · Gradient characteristic

3.2 2.9 2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.4

0.2 t

[

tVLFlow temperature t

Outdoor temperature

Caution!

Pt 100or Pt1000 sensorshould be used for measuring the flow temperature as only these sensors guarantee measurements up to 160 °C (max. temperature of the flow temperature set point).

Function

Outdoor sensor ON

WE Configuration

Co5 -> Fb00 = ON FUEHL: Outdoor temperature sensor AF

0–10: 0 to 10 V signal

3 °C

Frost protection limit / –30 to 20 °C*

* See section 8.8

EB 5474 EN 49

Page 50

System-wide functions

8.1.1 Gradient characteristic

Basically, the following rule applies: a decrease in the outdoor temperature causes the flow tem perature to increase. By varying the teristic to your individual requirements. Increasing ture, decreasing transport of the heating characteristic in an upward or downward direction.

Outside the times-of-use, reduced set points are used for control: Reduced flow set point

Max. flowtemperature

The its of the flow temperature. A separate gradient characteristic can be selected for the limitation of the return flow temperature.

Examples for adjusting the characteristic:

Old building, radiator design 90/70: Gradient approx. 1.8

New building, radiator design 70/55: Gradient approx. 1.4

New building, radiator design 55/45: Gradient approx. 1.0

Underfloor heating depending on arrangement: Gradient smaller 0.5

Functions

Type of characteristic OFF Co5 -> Fb03 = ON, select: 2 Type of characteristic for separate/direct

heating circuit*

Parameters

Gradient, flow 1.8 PA2*, PA3*, PA5 / 0.4 to 3.2 Level, flow 0 °C PA2*, PA3*, PA5 / –30 to 30 °C Set-back difference 15 °C PA2*, PA3*, PA5 / 0 to 30 °C Max. flow temperature 90 °C PA2*, PA3* / 20 to 160 °C Min. flow temperature 20 °C PA2*, PA3* / 20 to 120 °C

Gradient

in alower flowtemperature. The

= Flow set point–Set-back difference

and

Gradient

Min. flowtemperature

and

Level

WE Configuration

ON Co2, Co3 -> Fb10 = ON, select: 2*

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON WE Parameter level / Range of values

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON

parameters, you can adapt the charac

Gradient

parameters markthe upperand lowerlim

results in a higher flow tempera

Level

parameter performsa parallel

50 EB 5474 EN

Page 51

System-wide functions

[˚C]

8.1.2 4-point characteristic

The 4-point characteristic allows you to define your own heating characteristic. It is defined by 4 points for the

set-back difference

is predetermined for points P1 and P2 and for points P3 andP4 inthe corre

Outdoor temperature

sponding parameter level, resulting in the dashed line in Fig. 6.

Max. flowtemperature

The

and

Min. flowtemperature

its of the flow temperature.

[˚C]

100

VLmax

90 80 70 60 50

VLmin

40 30 20 10

20 15 10 5 0 –5 –10 –15 –20

Fig. 6 · 4-point characteristic

and the

Flow temperature

parameters markthe upperand lowerlim

P1 to 4 Points 1 to 4

Flow temperature

Outdoor temperature

..min Min. flow temperature ..max Max. flow temperature

4-point characteristic

-------- Reduced 4-point characteristic

. The

Boiler

Functions

WE Configuration

Type of characteristic OFF Co5 -> Fb03 = ON, select: 1 Type of characteristic for separate/

OFF Co2, Co3 -> Fb10 = ON, select: 1*

direct heating circuit*

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON

EB 5474 EN 51

Page 52

System-wide functions

Parameters

Outdoor temperature Point 1

Point 2 Point 3 Point 4

Flow temperature Point 1

Point 2 Point 3 Point 4

Set-back difference Points

½ Points

3/4 Max. flow temperature 90 °C PA2*, PA3* / 20 to 160 °C Min. flow temperature 20 °C PA2*, PA3* / 20 to 120 °C

WE Parameter level / Range of values –10 °C

– 5 °C

10 °C 90 °C

80 °C 68 °C 50 °C

15 °C 20 °C

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON

PA2*, PA3*, PA5 / –20 to 50 °C

5 °C

PA2*, PA3*, PA5 / 20 to 160 °C

PA2*, PA3*, PA5 / 0 to 30 °C

8.2 Fixed set point control

During the times-of-use, the flow temperature can be controlled according to a fixed Outside the times-of-use, this

Set point

is reduced by the

Set-back difference

The fixed set point control is activated when there is no outdoor sensor AF connected to the system or when it has been configured in the function block Type of characteristic. In the case that the fixed set point control is configured and an outdoor sensor is connected, the outdoor temperature is displayed in the InF5 level. The outdoor temperature does not have any effect on the control loop.

Functions

Type of characteristic OFF Co5 -> Fb03 = OFF Type of characteristic for separate/

direct heating circuit*

Parameters

Flow temperature set point 70 °C PA2*, PA3*, PA5 / 20 to 160 °C Set-back difference 15 °C PA2*, PA3*, PA5 / 0 to 30 °C

WE Configuration

OFF Co2, Co3 -> Fb10 = OFF*

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON WE Parameter level / Range of values

* Only in systems Anl 1 to 3 with Co5 -> Fb13 = ON

Set point

52 EB 5474 EN

Page 53

System-wide functions

8.3 Differential temperature control using variable weighting factors

This functionallows thereturn flow temperature, total (RüFg) to be taken into account in the con trol loop, in addition to the flow temperature, total (VFg). The difference between the flow temperature, total (VFg) and return flow temperature, total (RüFg) is specified using the

Intended temperature difference

parameter. It is a measure for the energy consumption in a heating circuit. The greater the temperature difference, the larger the energy required by a heating circuit. If the actual temperature difference is not the same as the intended temperature difference, it is evaluated by the

. After initial signs for a deviation occur, the flow temperature is raisedor reducedby this

control

Kp factor for differential temperature

factor. When the

Kp factor for differential temperature control

is set to 0, the return flow temperature does not have any effect on the control of the flow temperature. When the

Kp factor for differential temperature control

is set to 1, a pure return flow tempera ture limitation takes place.

Function

Return flow sensor, total RüFg OFF

WE Configuration

Co5 -> Fb02 = ON

10 °C

Intended temperature difference / 0 to 90 °C

0.5

Kp factor for differential temperature control / 0 to 1

8.4 Deactivation depending on outdoor temperature

The controller switches to the stand-by mode when

to summer mode in rated operation

during times-of-use or

change to summer mode in reduced operation

Should the temperature fall below the limit, the heating is started again. The function for deacti vation depending outdoor temperature is set by default.

Parameter

Outdoor temperature limit causing change to summer mode in rated operation

Outdoor temperature limit causing change to summer mode in reduced operation

WE Parameter level / Range of values 22 °C PA5 / 0 to 50 °C

10 °C PA5 / –10 to 50 °C

Outdoor temperature limit causing change

Outdoor temperature limit causing

outside times of use is exceeded.

EB 5474 EN 53

Page 54

System-wide functions

8.5 Summer mode

Summer mode is activated depending on the mean daytime temperature (measured between

7.00h and 22.00h) during the desired period. If the mean daytime temperature exceeds the

Outdoor temperature limit

on two consecutive days, summer mode is activated on the following day: the heating is switched off. If the mean daytime temperature remains below the

Outdoor temperature limit

on the next day, summer

mode is deactivated on the following day.

Function

Summer mode ON

WE Configuration

Co5 -> Fb06 = ON

01.06

Start summer mode / 01.01 to 31.12

30.09

Stop summer mode / 01.01 to 31.12

18 °C

Outdoor temperature limit /0 to 40 °C

8.6 Delayed outdoor temperature adaptation

The calculated outdoor temperature is used to determine the flow temperature set point. The heat response is delayed when the outdoor temperature either decreases, or increases and decreases. If the outdoor temperature varies by, for example, 12 °C within a very short period of time, the calculated outdoor temperature is adapted to the actual outdoor temperature in small

Delay

steps. Assuming a

of 3 °C/h, the adaptation would take

°°12

Note!

The delayed outdoor temperature adaptation helps avoid unnecessary overloads of central heating stationsin combination with either overheated buildings occurring, forexample, due to warm winds, or temporarily insufficient heating due to the outdoor sensor being exposed to di rect sunshine.

Function

Delayed outdoor temperature adaptation OFF

WE Configuration

Co5 -> Fb01 = ON AB Delay on decreasing temperature

ABAUF Delay on decreasing and increasing

Delay / 1 to 6.0 °C/h

3 °C/h

temperature

54 EB 5474 EN

Page 55

System-wide functions

8.7 Automatic summer time/winter time changeover

The clock is automatically adjusted on the last Sundayin Marchat 2.00h and on the last Sunday in October at 3.00h.

Function

Summer time/winter time changeover ON Co5 -> Fb05 = ON

WE Configuration

8.8 Frost protection

To protect the system from freezing up, the flow temperature or return flow temperature are monitored.

Note!

The frost protection function is not activatedwhen manualmode is selected at the mode switch.

Flow temperature monitoring

The flow temperature cannot drop enough to cause the pipes to freeze when the controller is in rated or reduced operation. In stand-by mode, the flow temperature is not regulated. Therefore, it ismonitored. Shouldthe flow temperature fall below 3 °C, the flow temperature is restrictedto the minimum return flow temperature.

Return flow temperature monitoring

The outdoor temperature is monitored at the input AF (outdoor sensor) or at the input AE2 (0 to 10 V signal). In both cases, the

Frost protection limit

(–30 to 30 °C, WE: 3 °C with Co5 -> Fb00 = ON) must be defined to monitor this parameter. Alternatively, a frost protection thermostat can also be used for monitoring. This requires input AF to be configured as a binary input (BE11) (Co5 -> Fb00 = OFF, FroSt). If there is no boiler in operation and the outdoor temperature falls below the frost protection limit or if the binary input of the frost protection thermostat is active, the pumps are activated and the valves opened. As a result,the systemor individual parts of the system cannotfreeze.

Function

Outdoor sensor

WE Configuration ON Co5 -> Fb00

EB 5474 EN 55

Page 56

System-wide functions

8.9 Forced operation of the pumps

When the pumps (Pu1, Pu2 and Pu3) have not been activated for 24 hours, forced operation of the pumps is started between 12.00h and 12.01h. The forced operation of the storage tank pump SLP is operated between 12.01h and 12.02h.

8.10 Flow temperature limitation

The boiler temperature is regulated to the limit set in

Maximum flow temperature

and an alarm

is displayed when the flow temperature at the boiler outlet of a modulating burner reaches the

Maximum flow temperature+Temperature rise

limit The limitation is stopped again when the flow temperature falls below the limit set in

flow temperature

Maximum

During the active limitation, the boiler temperature blinks in InF1 and InF2 levels. Press to read the limit.

Function

Boiler sensor KF1, 2

Parameters

Maximum flow temperature KF1, 2 90 °C PA1, PA2* / 20 to 160 °C Temperature rise 10 °C PA5 / 0 to 30 °C

WE Configuration ON Co1, Co2* -> Fb03 = ON * Only in systems Anl 4 to 7

WE Parameter level / Range of values

* Only in systems Anl 4 to 7

Note! The controller cannot replace a safety temperature limiter.

The flow temperature is monitored by athermostat whenthe functionis deactivated. The input of the flow sensor is defined as a binary input. The thermostat is connected to terminals 24 (RK1) or 25 (RK2).

Function

Boiler sensor KF 1, 2 ON Co1, Co2* -> Fb03 = OFF

WE Configuration

StEiG Thermostat closes FALL Thermostat opens

*Only in systems Anl 4 to 6

Note! The sensor inputs VF1 and VF2 cannot be used as thermostat inputs in system Anl 7.

56 EB 5474 EN

Page 57

System-wide functions

8.11 Control mode

The selected control mode (section 8.11.1 to 8.11.3) of the return flow boost affects the control mode of the modulation and vice versa. The following connection applies:

Return flow boost in continuous control <–> Modulation in three-point

Return flow boost in on/off or three-point control <–> Modulation in continuous

On using modulating burners (systems Anl 6 and 7), the default setting of the control signal for the returnflow boost is configured to be continuous (Co1, 2 -> Fb05 = ON)and the modulation control uses a three-point signal. With Co1, 2 -> Fb05 = OFF, this assignment is reversed, meaning that the modulating burners can also be controlled with a continuous signal.

Setting for return flow boost: continuous control; Modulation: three-step control

Functions

RüL-RK1, 2

Setting for return flow boost: three-step control; Modulation: continuous control

Functions

RüL-RK1, 2

3-step pulsing/on-off signal RüL-RK1, 2 OFF Co1, Co2* -> Fb06 = ON

WE Configuration

Co1, Co2* -> Fb05 = ON

6 120 s 0 s

WE Configuration

6 120 s 0 s 120 s

(proportional gain) / 0.1 to 99.9

(reset time) / 0 to 999 s

(derivative-action time) / 0 to 999 s

Co1, Co2* -> Fb05 = OFF K

(proportional gain) / 0.1 to 99.9

(reset time) / 0 to 999 s

(derivative-action time) / 0 to 999 s

(valve transit time) / 5 to 240 s

Setting for return flow boost: on/off control; Modulation: continuous control

Functions

RüL-RK1, 2

3-step pulsing/on-off signal RüL-RK1, 2 OFF

WE Configuration

Co1, Co2* -> Fb05 = OFF K

6 120 s 0 s 120 s

5 °C 120 s 120 s

(proportional gain) / 0.1 to 99.9

(reset time) / 0 to 999 s

(derivative-action time) / 0 to 999 s

(valve transit time) / 5 to 240 s

Co1, Co2* -> Fb06 = OFF Hysteresis / 1 to 30 °C

Min. activation time / 0 to 600 s Min. deactivation time / 0 to 600 s

EB 5474 EN 57

Page 58

System-wide functions

* Only in systems Anl 4 to 7

Note!

The control mode is configured separately in Co2 -> Fb14 or Fb15 for the separate heating cir cuit in systems Anl 1 to 3 (Co5 -> Fb13 = ON).

8.11.1 Three-step control

The setpoint can be controlled using a PI algorithm. Thevalve reacts to pulses that the controller emits whena system deviation occurs. The length ofthe first pulse. in particular, depends onthe extent of the system deviation and the selected

increases). The pulse and pause lengths change continuously until the system deviation

as K

Proportional gain K

has been eliminated. The pauselength betweenthe singlepulses isgreatly influencedby the

set time T

The

(the pause length increases as TNincreases).

Transit time T

specifies the time required by the valve to travel through the range of 0 to

(the pulse length increases

100 %.

8.11.2 On/off control

The output signal of the controller is switched on or off. Depending on the controlled variable, the outputsignal is switched on oroff when the temperature fallsbelow orexceeds the required set point by T = 0.5 x

selected, the less the signal is switched on and off. The

esis mum deactivation time

determine the time interval between changes in the output signal.

Hysteresis

Minimum activation time

. Thegreater the

and

Hyster-

Mini-

8.11.3 Continuous control

The set point can be controlled using a PID algorithm. The valve receives an analog 0 to 10 V signal from the controller. The proportional component causes an immediate change in the 0 to 10 Vsignal when a system deviation occurs (the greater the K tegral-action component only comes into effect when a certain time has passed: T the time passing until the integral-action component has changed theoutput signal to the extent that the proportional component directly changed the signal (the greater the T rate of change). The derivative-action component determines how strongly a change in the sys tem deviation affects the output signal (the greater the T

58 EB 5474 EN

, thegreater the change). The in

, the slower the

, the stronger the change).

stands for

Page 59

8.12 Control signal deactivation

System-wide functions

This function protects three-point stepping actuators without final position deactivation from over loading bymonitoring the total of thecontrol signal pulses. No furthercontrol signals are issued if it exceeds three times the

Valve transit time T

. It is assumed that the control valve is already open

or closed, meaning further control signals do not change the valve position.

Function

Control signal deactivation OFF Co5 -> Fb16 = ON

WE Configuration

8.13 Processing of external demand

The controller (= primary controller) is able to process analog signals for demand. The external flow temperature set point of the preceding controller is received over the analog input AE1. 0 to 10 V corresponds to 0 to 120 °C. Demands under a signal of 1 V are sup pressed. The received flow temperature set point is compared to the controller’s own flow tem-

Boost

perature set point. The higher of both flow temperature set points plus the

parameter is

used for the control.

Boost

The

parameter improves the control characteristic of the downstream control valves in the

heating circuit and compensates for any pipeline losses.

Function

External demand OFF Co5 -> Fb15 = ON

WE Configuration

0 °C Boost / 0 to 30 °C

8.14 Feedforwarding the outdoor temperature

The outdoortemperature can be passed on to anothercontroller over the analog output AA2 (0 to 10 V) by setting Co2 -> Fb05 = ON, provided this output isnot usedfor acontrol signalor for the modulation control.

Systems Anl 1 to 3:

The outdoor temperature is constantly applied to AA2. No special settings are necessary. 0 to 10 V corresponds to –40 to 50 °C.

Systems Anl 4 to 6:

Function

Continuous RüL-RK2 OFF Co2 -> Fb05 = OFF

WE Configuration

EB 5474 EN 59

Page 60

System-wide functions

System Anl 7:

The outdoor temperature cannot be passed on as the output AA2 is constantly used for a control signal or for the modulation control.

8.15 Locking of changed settings

An active locking of all manual levels means that no settings (configuration and parameterization) can be performed at the controller.

Function

Configuration and parameterization protection

WE Configuration OFF Co5 -> Fb04 = ON

60 EB 5474 EN

Page 61

Operational faults

9 Operational faults

Operational faults are indicated by the icon blinking on the display. “Error“ immediately appears on the display. Press to access the error level. Use the arrow

keys toscroll thedifferent error alarms, if need be. The error level remains inthe displayloop as long as an acute operational fault exist even if it has not be opened by pressing .

9.1 Error list

Err 1 Sensor failure in RK1 (in combination with sensor icons)

Err 2 Sensor failure in RK2 (in combination with sensor icons)

Err 3 Sensor failure in heating circuit (in combination with sensor icon)

Err 4 Sensor failure in DHW circuit (in combination with sensor icons)

Err 5 Failure of sensor VFg, RüFg or AF (in combination with sensor icons)

Err b1 Fault in Boiler K1

Err b2 Fault in Boiler K2

Err P1 Fault in Pump Pu1

Err P2 Fault in Pump Pu2

Err-1 Default values read (default settings)

Err-2 Final temperature of thermal disinfection not achieved

Err-3 Mode selector switch 1 defective

Err-4 Selector switch defective

Err-5 Correction switch for the flow temperature defective

9.2 Sensor failure

The errorlist explains how the “Err-1”to “Err-5” on the display inthe error level indicate sensor failures. After exiting the error level, detailed information can be found within the operating level by reading each temperature: A sensor icon in combination with three dashes instead of the measured temperature on the display indicates that this sensor is defective.

Sensor icons

Outdoor sensor AF Flow sensor VF2, VFg,

Boiler sensor KF1, KF2

Return flow sensor RüF1, RüF2, RüFg

Room sensor RF Storage tank sensor SF1 Storage tank sensor SF2

EB 5474 EN 61

Page 62

Operational faults

The following list shows how the controller reacts depending on which sensor fails:

Outdoor sensor AF: When the outdoor sensor fails, the controller uses a flow temperature

set point of 70 °C. The boiler pumps are switched on and the control valves of the return flow boost are opened to ensure frost protection. Flow sensor VFg: Both boilers are switched off immediately.

Flow sensor VF1, VF2: The affected boiler is switched off. The other boiler takes over.

Return flow sensor RüFg: The controller continues to functionwithout thedifferential temper

ature control using variable weighting factors. Boiler return flow sensor RüF: The controller continues to function without the return temper

ature limitation. If the affected boiler is switched on, the boiler pump is switched on and the control valve receives a constant signal. Storage tank sensor SF1/SF 2: When one of the sensors fail, storage tank charging no lon

ger takes place. Boiler K1, K2 (binary inputs SM_K): The affected boiler and the associated pump are

stopped. Pumps (binary inputs SM_P): The affected boiler and the associated pump are stopped.

9.3 Displaying the lead/collective error alarm

The lead is indicated over BA2 when the function block is active:

Lead 1: BA2 = OFF

Lead 2: BA2 = ON

The binary output BA2 is set in the event of an error when the function block is not active. Errors are still displayed by “Err” in the info level.

Function

Displaying lead/collective alarm OFF Co5 -> Fb11

WE Configuration

9.4 Error status register

The error status register is used to indicate controller or system errors. In modem operation with

Dial-up also upon corrected fault

the building control station to be dialed. The error status registers are displayed in InF8 level. By default the error status register FSR1

(holding register 60) is displayed. Keep pressed to display FSR2 (holding register 61). In both displays, function blocks Fb20 to Fb23 are set when a bit is set in the error status register not being displayed.

62 EB 5474 EN

function, any change in state of the error status register causes

Page 63

Operational faults

Holding register 60 (HR60)

Number = Bit no. in HR 0 1234567891011 A set bit is indicated by on the right of

number

Bit value 2 Sensor breakage D0 Default values read D1 –D2 Mode switch faulty D3 Boiler switch faulty D4 Correction switch for flow temp. faulty D5 Unauthorized access D6 Error alarm of a binary input Error alarm WMZ M-Bus D8 Data error alarm from WMZ D9 – D10 Fault alarm binary input changed D11

0212223242526272829210211

Holding register 61 (HR61)

Number = Bit no. in HR 0 1 2 3 A set bit is indicated by on the right of number

Bit value 2 Error thermal disinfection D0 –D1 –D2 Error Boiler 1, 2 or Pump Pu1,2, or

Temperature exceeded limit

0212223

Example of a transfer to the control system:

The error statusregister istransferred asa word<w> in a holding register (HR) whose content is represented by the total of the value <z> of the active data bit:

<w> = ([D0] x <1> + [D1] x <2>) + … + ([D11] x <2048>)

EB 5474 EN 63

Page 64

Operational faults

9.5 Error alarms

Error alarms can be sent over amodem either directly to thecontrol station or over the SMStext message functionto a mobile phone or to a fax. Just onefunction (Modbus, SMS function or fax function) can be selected at one time since the functions use the same interface. The error alarms to a mobile phone and to a fax contain the number of the affected error status register (FSR1/FSR2), the fault as per error status register (BitNo), the controller ID and the bit number (Bit xx).

9.5.1 Sending text message in case of error

Currently, text messages can only be sent to the German D1 network. The corresponding access numbers into the D1 network as well as the mobile phone number of the recipient must be set in the PA9 level:

D1 access number: 0171 252 10 02

(add 0 in front when dialing from a private branch exchange) Digits 0 to 9, P = pause, - = end, max. 22 characters The access number is assigned by Deutsche Telekom and may alter. Mobile phone number: 49 xxx yyyyyyy , where xxx stands for 160, 171 or any other valid

D1 dialing code and yyyyyy represents the specific phone number of the mobile phone you wish the alarm to be sent to. Digits 0 to 9, P = pause, - = end, max. 14 characters

Note!

Currently, text messages can only be sent to the German D1 network.

Functions

Modbus ON Co9 -> Fb00 = OFF Modem function OFF Co9 -> Fb01 = OFF Text message alarm to a mobile

phone SMS dialing procedure OFF Co9 -> Fb07 Alarm sent per fax OFF Co9 -> Fb10 = OFF

64 EB 5474 EN

WE Configuration

OFF Co9 -> Fb06 = ON

Page 65

Operational faults

Parameters

Access number – PA9 / configurable as required* Phone number – PA9 / configurable as required** * Digits 0 to 9, P = pause, - = end, max. 14 characters ** Digits 0 to 9, P = pause, - = end, max. 22 characters

WE Parameter level / Range of values

9.5.2 Sending fax in case of a fault alarm

The controller type is forwarded in addition to a detailed error description. The recipient’s fax number must be programmed in the PA9 level. Optionally, also the sender’s station ID can be programmed; this number will then be forwarded as well. If no station ID is specified, the string “nicht verfügbar“ (not available) is inserted.

Fax number:

Digits 0 to 9, P = Pause, - = End, max. 14 characters (place an additional 0 in front when dialing from a private branch exchange)

Phone number of sending fax:

Digits 0 to 9, P = Pause, - = End, max. 14 characters

Functions

Modbus ON Co9 -> Fb00 = OFF Modem function OFF Co9 -> Fb01 = OFF Text message alarm to a mobile phone OFF Co9 -> Fb06 = OFF Alarm sent per fax OFF Co9 -> Fb10 = ON Fax dialing procedure OFF Co9 -> Fb11

Parameters

Fax number – PA9 / configurable as required* Phone number of sending controller – PA9 / configurable as required* * Digits 0 to 9, P = pause, - = end, max. 14 characters

WE Configuration

WE Parameter level / Range of values

EB 5474 EN 65

Page 66

Communication

10 Communication

Using the serial system bus interface RS-232-C, the TROVIS 5474 Boiler Controller can commu nicate with a building control system. In combination with a suitable software for process visual ization and communication, a complete control system can be implemented.

The following communication settings are possible:

– Operation with a dial-up modem at the RS-232-C system bus interface

Basically, communication is only established automatically when errors occur. The controller works autonomously. Nevertheless, the modem can dial up to the controller at any time to read data from it or otherwise influence it, if necessary. We recommend to use the modem connect ing cable (1400-7139).

– Operation with a leased line modem at the RS-232-C system bus interface Communication is established via a permanent connection between two leased line modems. This setup is applied for long-distance transmissions or when different signal level converters are used. The connection between controller and modem can also be established via the modem connecting cable (1400-7139). – Operation at a four-wire or two-wire bus To establish the link between controller and bus line, thesignal level needs to be converted by a converter (SAMSON’s cable converter 1400-7308).

GLT

RS 232C RS 232C

TROVIS 5474

RS232

RS485

RS 485

RS232

RS485

RS232

RS485

Fig. 7 · Network structure

66 EB 5474 EN

Page 67

Communication

10.1 Controller with RS-232 port

The system bus connection is located at the back of the controller housing (RJ-12 jack). In this case, the controller can be connected either directly to the serial interface of a PC (point-to-point connection)or to a (dial-up) modem. A dial-upmodem is required if the control ler is to be connected to the telecommunications network. In this case, the controller works au tonomously and can issue an alarm call to the building control station when errors occur. Addi tionally, the building control station can dial up the controller, read data from it, and send new data once the valid key number has been written to the holding register no. 40070. On recognizing the key code from the controller as valid, the register value “1” confirms writing permission. In any other case, the register value remains at “0”. Any further establishment of communications requires the writing permission to beacquired byresending the key number.

Note!

If a wrong key number has been written to holding register no. 40070 for the third consecutive time, the controller immediately interrupts themodem connectionand setsthe D6bit ofthe error status register (Unauthorized access). As a result, the call to the configured control system is triggered and a text message/fax sent. Bit D6 is deleted as soon as the error status register has been read by the control system and the connection has been terminated.

In special cases, the Lock dial-up function can be selected to stop dial-up in case an error occurs. Using the Dial-up also upon corrected error function, the controller additionally informs the building control station when a previously signaled error no longer persists.

Functions

Modbus ON Co9 -> Fb00 = ON Modem function OFF Co9 -> Fb01 = ON Modem dialing procedure OFF Co9 -> Fb02 Lock dial-up OFF Co9 -> Fb03 Modbus 16-bit addressing OFF Co9 -> Fb04 Dial-up also upon corrected fault OFF Co9 -> Fb00

Parameters* Station address (ST.-NR) 255 PA9 / 1 to 247 (with Fb04 = ON: 1 to 999) Baud rate (BAUD) 9600 PA9 / 300 to 19200 Cyclic initialization (I) 30 min PA9 / 0 to 255 min Modem dial interval between calls (P) 5 min PA9 / 1 to 255 min

WE Configuration

WE Parameter level / Range of values

EB 5474 EN 67

Page 68

Communication

Parameters* Modem timeout (t) 5 min PA9 / 1 to 255 min Number of redial attempts (C) 5 PA9 / 0 to 99 Phone number of building control station

(tELno) Phone number of alternative recipient

(rESno)

** Digits 0 to 9, P = Pause, - = End, max. 23 characters

WE Parameter level / Range of values

– PA9 / Set as required**

* –> Section 10.3 (“Description of communication parameters to be adjusted“)

10.2 System bus interface in conjunction with cable converters RS-232/RS-485 (for four-wire bus)

A constant bus connection is required (data cable) for the operation of the controller with serial RS-485 interface. The bus line links the control units/devices in an open ring. At the end of the bus line, the data cable is connected to the control station using an RS-485/RS-232 converter (e.g. TROVIS 5484). The maximum range of the bus connection (cable length) is 1,200 meters. A maximum of 32 devices can be connected to such a segment.

If you wish to use more than 32 devices in line or need to bridge greater distances, make sure repeaters (e.g. TROVIS 5482) are installed to replicate the signal. With 8-bit addressing, a maximum of 246 devices can be addressed and connected to a bus.

Warning!

You are required to follow the relevant standards and regulations concerning lightning and overvoltage protection on installation.

Functions

Modbus ON Co9 -> Fb00 = ON Modem function OFF Co9 -> Fb01 = OFF Modbus 16-bit addressing OFF Co9 -> Fb04

Parameters* Station address (ST.-NR) 255 PA9 / 1 to 247 (with Fb04 = ON: 1 to 999) Baud rate 9600 PA9 / 300 to 19200

* –> Section 10.3 (”Description of communication parameters to be adjusted“)

WE Configuration

WE Parameter level / Range of values

68 EB 5474 EN

Page 69

Communication

10.3 Description of communication parameters to be adjusted

Station address (ST.-NR)

This address is used to identify the controller in bus or modem mode. In a system, each control ler needs to be assigned a unique address.

Baud rate (BAUD)

In a bus system, baud rate refers to the transfer speed between control system and controller. In modem mode, baud rate refers to the transfer speed between controller and modem. The baud rate adjusted at the controller must correspond with the baud rate of the control sys tem, otherwise no communication can be established.

Cyclical initialization (I)

This parameter defines the period of time for a cyclical issue of the initialization command “ATZ“. The command is not issued during dial-up or when connected. “ATZ“ causes the pro file 0 to be copied to the active profile, provided the modem parameters have been set and saved in profile 0 using a suitable terminal program.

Typical initialization of a modem with a terminal program:

AT & F (restores modem to its factory settings) OK (response of the modem) ATEOSO = 1(command input, EO: echo off;

SO = 1: answer on first ring)

Dialing pause (P)

It is recommendable to pause for approx. 3 to 5 minutes between dialing up to the control system to avoid a permanent overloading of the telecommunications network. The defines the interval between 2 dialing attempts.

Modem time-out (t)

When the controller connects to the control station but without addressing a Modbus data point, the connection is closed after the time specified for tus register has not been read during the control station connection, the controller dials up to the control station again after the

Number of redialing attempts (C)

The controller tries to dial up to the control system again, observing the the control stationis busyor thefunction thattriggered the call has not been reset by the control ler. Afterthe specified number of redialingattempts have failed, the controller dialsthe alterna tive recipient.

Reset the function that triggered the call = Polling the error status register (HR 40060)

Dialing pause

Modem time-out

(P) has elapsed.

has elapsed. If the error sta

Dialing pause

, in case

EB 5474 EN 69

Page 70

Communication

Phone number of control station (tElno)

Enter the phone number of the control system modem including the dialing code, if necessary. Short pauses between the numbers can be entered using P (= 1 second); the end of the string is to be marked by “–“. The phone number may include a maximum of 22 characters. Example: “069, 2sec. pause, 4009, 1 sec. pause, 0“:069PP4009P0–(=11characters)

Phone number of alternative recipient (rESno)

Enter thephone number of an alternative recipient, ifrequired including the dialing code. Short pauses between the numbers can be entered using P (= 1 second); “–“ indicates the end of the string. The phone number can include max. 22 characters. Example: “069, 1 sec. pause, 654321“: 0 6 9 P 6 5 4 3 2 1 – (= 10 characters)

Common modem settings are:

EO - Echo off

QO - Enable result codes

X3 - Dial without checking for dial tone

% CO - Data compression off

\ N1 - Buffer off, fault correction off

V1 - Result codes in text format

% B 9600 - Baud rate 9600

\ VO - Standard connect result code

Resetting to default settings

A modem can be reset to its default settings directly at the controller after entering the key number.

Key number Command 44 AT&F&W <CR> <LF>

45 AT&F&W ATX3 <CR> <LF> (for branch exchange systems)

70 EB 5474 EN

Page 71

Communication

Note!

The initialization settings described here are indispensable for operation on a dial-up modem. Nevertheless, it cannot be guaranteed that data are transferred after the initialization settings have been adjusted. Due to the broad range of modems available on the market and the diffe rent commands, refer to the operating manual of the modem for further details.

GND TD DTR RTSRDDCD

Fig. 8 · Pin assignment of RJ-12 jack

10.4 Meter bus interface

The TROVIS 5474 Controller can communicate with up to 3 heat and water meters according to EN 1434-3. Details on the useof thedifferent heator watermeters canbe found in the technical documentation TV-SK 6311.

10.4.1 Activating the meter bus

To successfully transfer data from the heat meter (WMZ) to the controller, the heat meter must use a standardized protocol in accordance with EN 1434-3. It is impossible to make a general statement about which specific data can be accessed in each meter. For details on the different meter makes, refer to the technical documentation TV-SK 6311.

All necessary function block parameters to set up communication with heat or water meters are available in Co9 -> Fb21 to Fb23. The meter bus address, the model code, and the reading mode must be specified. A meter bus address must be unique and correspond with the address preset in the heat meter.

If the preset meter bus address is unknown, a single heat meter connected to the controller can be assigned meter bus address 254. Address 255 deactivates communication with the respec tive heat meter. The model code, which needs to be set for the respective heat meter, can be found in TV-SK 6311.

In general, the default setting of 1434 can be used for most devices.

EB 5474 EN 71

Page 72

Communication

The meters can be read either automatically approx. every 24 hours (24h), continuously (con) or when the coils (= Modbus data points) assigned to the heat meters WMZ1 to WMZ3 are written with the value 1 over the system bus interface (CoiL).

In InF9info level, “1434“ is displayed when the meter bus isactivated. Press the enter key to get to the display referring to the meter bus. For each of the three heat meters whose address is not 255, “buSi“ (with i = 1, 2, 3) appears. Press the enter key again to display the following in formation about the associated heat meter:

Flow rate (d, cm/h)

Volume (U, cm³)

Output capacity (P, kW)

Energy (A, Mwh, GJ)

Flow temperature (b, °C)

Return flow temperature (b, °C)

Meter ID number (L without enter key, H with enter key)

Meter bus address (sent by WMZ) (A, –)

Blinking values in combination with black squares in the top row of the display (fault status of the associated meter –> TV-SK 6311) indicate different faults.

Note!

With reading mode “24h“,the displayedvalues arenot updatedby readingthe status information again; the values read during the last cycle remain unchanged. With reading mode“con, thevalues in the levels are not continuously updated. Reopen the specific level to get current values.

Function

Meter bus OFF

72 EB 5474 EN

WE Configuration

255 1434 con

Co9 -> Fb21 = ON, Fb22 = ON, Fb23 = ON Meter bus address for WMZ 1 to 3 / 0 to 255

Model code WMZ 1 to 3 / P15, PS2, 1434, CAL3, APAtO, SLS Reading mode WMZ 1 to 3 / 24h, con, CoiL

Page 73

Communication

10.5 Memory module

The use of a memory module (accessory no. 1400-7142) is particularly useful to transfer all data fromone TROVIS 5474 Controller to several other TROVIS 5474 Controllers. The memory module is plugged into the RJ-12 jack integrated into the front panel. Once the module has been connected, “74 SP“ is displayed. If the memory module already contains data from a dif ferent TROVIS 5474 Controller, press the enter key until “SP 74" is displayed.

Pressing the enter key to confirm “74 SP“ causes the controller settings to be transferred to

the memory module. Pressing the enter key to confirm “SP 74“ causes the saved controller settings to be trans

ferred from the memory module to the controller.

During the data transfer, the bars on the display indicate the progress. After the display stops, remove the memory module from the controller.

EB 5474 EN 73

Page 74

Installation

11 Installation

The controller consists of the housing with the electronics and the back panel with the terminals. It is suitable for panel, wall, and top hat rail mounting (Fig. 9).

Panel mounting

1. Remove both screws (1).

2. Pull apart the controller housing and back panel.

3. Make a cut-out of 138 x 91 mm (width x height) in the control panel.

4. Insert the controller housing through the panel cut-out.

5. Insert one mounting clamp (2) each at the top and bottom or at the sides. Screw the

threaded rod towards the panel with a screwdriver such that the housing is clamped against the control panel.

6. Install the electrical connections at the back of the housing as described in section 11.

7. Fit the controller housing.

8. Fasten both screws (1).

Wall mounting

1. Remove both screws (1).

2. Pull apart the controller housing and back panel.

3. If necessary, bore holes with the specified dimensions in the appropriate places. Fasten

the back panel with four screws.

4. Install the electrical connections at the back of the housing as described in section 11.

5. Fit the controller housing.

6. Fasten both screws (1).

Top hat rail mounting

1. Fasten the spring-loaded hook (4) at the bottom of the top hat rail (3).

2. Slightly push the controller upwards and pull the upper hooks (5) over the top hat rail.

74 EB 5474 EN

Page 75

Panel mounting

Installation

Back panel of the

controller

Wall mounting

Dimensions in mm:

W x H x D = 144 x 96 x 125

Fig. 9 · Installation

Top hat rail mounting

Controller housing

EB 5474 EN 75

Page 76

Electrical connection

12 Electrical connection

Caution!

For electrical installation, you are required to observe the relevant electrotechnical regulations of the country of use as well as the regulations of thelocal powersuppliers. Makesure all electri cal work is performed by trained and experienced personnel!

Notes on installing the electrical connections

Install the 230 Vpower supplylines andthe signallines separately!To increase noise immu

nity, observe a minimum distance of 10 cm between the lines. Make sure the minimum dis tance is also observed when the lines are installed in a cabinet. The lines for digitalsignals (buslines) andanalog signals(sensor lines,analog outputs) must

also be installed separately! In plants with a high electromagnetic noise level, we recommend to use shielded cables for

the analog signal lines. Ground the shield at one side, either at the control cabinet inlet or outlet, using the largest possible cross-section. Connect the central grounding point and the PE grounding conductor with a cable≥10 mm² using the shortest route. Inductances in the control cabinet, e.g. contactor coils, are to be equipped with suitable in-

terference suppressors (RC elements). Control cabinet elements with highfield strength, e.g. transformers or frequency converters,

should be shielded with separators providing a good ground connection.

Overvoltage protection

If signal lines are installed outside buildings or over large distances, make sure appropriate

surge or overvoltage protection measures are taken. Such measures are indispensable for bus lines! The shield of signal lines installed outside buildings must have current conducting capacity

and must be grounded on both sides. Surge diverters must be installed at the control cabinet inlet.

Connecting the controller

The controller is connected as illustrated in the following wiring diagrams. If individual inputs for other functions, e.g. for binary input, are to be used, it must be config ured in the configuration levels (Co1 to Co6). Open the housing to connect the cables. To connect the feeding cables, make holes in the marked locationsat the top, bottom or back of therear part of the housing and fit suitable cable glands.

76 EB 5474 EN

Page 77

Electrical connection

Connecting the sensors

Cables with a minimum cross-section of 2 x 0.5 mm² can be connected to the terminals at the back panel of the housing.

Connecting the actuators

Connect cables with at least 1.5 mm² suitable for damplocations to the terminals of the control ler output. The direction of travel needs to be checked at start-up.

Set slide switch to (+). Valves must open.

Set slide switch to (–). Valves must close.

Connecting the pumps

Connect allcables withat least 1.5 mm² to the terminals of the controller asillustrated inthe corre sponding wiring diagram.

Legend for wiring plans:

AA Analog output RL Return flow AA_GND Common analog grounding RüF Return flow sensor AE Analog input (general) RüFg Return flow sensor, total AF Outdoor temperature sensor SF Storage tank sensor BA Binary output SG_K Potentiometer BE Binary input SLP Storage tank charging pump BM_K Boiler operational fault SM_K Boiler fault alarm FG Potentiometer (valve) SM_Pu Pump fault alarm Frg_K Release boiler SM_S Collective fault alarm HK Heating circuit St Step of total capacity K Boiler VF Flow sensor KF Boiler sensor VFg Flow sensor, total MBUS Meter bus WWA DHW demand Pu Pump WWZ DHW forced charging RF Room sensor RK Control circuit

EB 5474 EN 77

Page 78

Electrical connection

System Anl 1

BE1 BE2 BE3 BE4 BE5 BE6 BE7 BE8 BE9 BE10 BE11 BE12 BE13 BE14 BE15 BE16 BE17

0...10V

0...10V BA1

BA2

System Anl 2

BE1 BE2 BE3

BE4 BE5 BE6 BE7 BE8 BE9 BE10 BE11 BE12 BE13 BE14 BE15 BE16 BE17

0...10V

0...10V BA1(2)

BA2(2)

RK1(RL)

RK2(HK)

Pu1(K1) Pu2(HK)

K1.1(ST.1)

SLP

RK1(RL)

RK2(HK)

Pu1(K1) Pu2(HK)

K1.1(ST.1)

K1.2(ST.2)

SLP

PU3

31 32 33

BA3

BA4

BA5

BA6

BA7

BA8

42 43

BA9

BA10

45 46

BA11

31 32 33

BA3

BA4

BA5

BA6

39 40

BA7

BA8

42 43

BA9

BA10

BA11

BA12

BM_K1

VFg

WWA

AE (BE)

VF2

KF1

RüF2

RüF1

RüFg

SM_Pu1

SF1

SM_K1

SF2

Frg_K1

AE_GND

RK1(AE 0...10V)

RK2(AE 0...10V)

GND

AA_GND

AA1(RK1)

AA2(RK2)

WWZ

SM_S

BM_K1

VFg

WWA

AE (BE)

VF2

KF1

RüF2

RüF1

RüFg

SM_Pu1

SF1

SM_K1

SF2

Frg_K1

AE_GND

RK1(AE 0...10V)

RK2(AE 0...10V)

GND

AA_GND

AA1(RK1)

AA2(RK2)

WWZ

SM_S

MODBUS

MBUS

+15V

N +

78 EB 5474 EN

Page 79

System Anl 3

System Anl 4

Electrical connection

EB 5474 EN 79

Page 80

Electrical connection

System Anl 5

System Anl 6

80 EB 5474 EN

Page 81

Electrical connection

System Anl 7

Note!

If the terminalsBE1 toBE17 areconfigured as 0 to 20 mA or 4 to 20 mA inputs, use terminal 13 (AE_GND) instead of terminal 10 as GND.

EB 5474 EN 81

Page 82

Appendix

13 Appendix

13.1 Function block list

Co1: Boiler K1

Fb Function WE Anl Function block parameter / Range of values (default setting)

00 Release of boiler K1 OFF 1 to 7 Co1 -> Fb00 = ON: Release K1 depending on position of

01 Operational alarmK1ON 1 to 7 Co1 -> Fb01 = ON: Operational alarm over BE2 BM_K1

02 Operating hours

counter K1

03 Boiler sensor KF1 ON 1 to 6 Co1 -> Fb03 = ON: Monitoring with sensor

04 Return flow sensor

RüF1

05 RüL-RK1 ON

OFF 1 to 7 Co1 -> Fb02 = ON: Operating hours counter active

ON 1 to 7 Co1 -> Fb04 = ON: Monitoring with sensor

OFF

mode selector switch and state of BE17 (Frg_K1) Co1 -> Fb00 = OFF: Release K1 only depending on position

of mode selector switch

Co1 -> Fb01 = OFF: Operational alarm after start-up

Function block parameter:

Start-up time for boiler K1 / 0 to 5400 s (0 s)

Function block parameter: Initial value / 0 to 99999 (0 h) Option: count: Counting the operating hours

rESEt: Reset operating hours to initial value

Note: Can only be changed after entering the key number.

Co1 -> Fb03 = OFF: Monitoring with thermostat (BE7), Option: StEiG: Thermostat closes

FALL: Thermostat opens

Note: Cannot be deactivated in system Anl 7.

Co1 -> Fb04 = OFF: Monitoring with thermostat (BE9), Option: StEiG: Thermostat closes

FALL: Thermostat opens

3, 6, 7

Co1 -> Fb05 = ON: Return flow boost continuous control,

1, 2,

Co1 -> Fb05 = OFF: Return flow boost three-step control

4, 5

Function block parameters: K

(proportional gain) / 0.1 to 99.9 (6)

(reset time) / 0 to 999 s (120 s)

(derivative-action time) / 0 to 999 s (0 s)

With Co1 -> Fb05 = OFF additionally: T

(valve transit time) / 5 to 240 s (120 s)

Modulation three-step control

Modulation continuous control, systems Anl 3, 6 and 7 only

82 EB 5474 EN

Page 83

Appendix

Fb Function WE Anl Function block parameter / Range of values (default setting) 06 Three-step pulsing/

on-off signal RüL-RK1

07 Modulation feedbackK1ON 3, 6, 7 Co1 -> Fb07 = ON: External feedback; the actually measured

Fb = Function block, WE = Default setting

ON 1 to 7 Co1 -> Fb06 = ON, only with Co1 -> Fb05 = OFF:

Three-step signal Co1 -> Fb06 = OFF: On-off signal

Function block parameters

Hysteresis / 1 to 30 °C (5°C) Min. activation time / 0 to 600 s (120 s) Min. deactivation time / 0 to 600 s (120 s)

resistance data are given

Function block parameters

Lower value (Start)=0%Modulation (0=1kΩ) Upper value (Stop) = 100 % Modulation (1000=2kΩ)

Co1 -> Fb07 = OFF: Internal feedback

Function block parameters:

(proportional gain) / 0.1 to 99.9 (2)

(reset time) / 0 to 999 s (30 s)

(derivative-action time) / 0 to 999 s (0 s)

(Modulation transit time) / 5 to 240 s (30 s)*

* Only when Co1 -> Fb05 = ON is also configured

EB 5474 EN 83

Page 84

Appendix

Co2: Boiler K2 (systems Anl 4 to 7)

Fb Function WE Anl Function block parameter / Range of values (default setting)

00 Release of boiler K2 OFF 4 to 7 Co2 -> Fb00 = ON: Release K2 depending on position of

01 Operational alarmK2ON 4 to 7 Co2 -> Fb01 = ON: Operational alarm over BE1 BM_K2

02 Operating hours

OFF 4 to 7 Co2 -> Fb02 = ON: Operating hours counter active

counter K2

03 Boiler sensor KF2 ON 4 to 6 Co2 -> Fb03 = ON: Monitoring with sensor

04 Return flow sensor

ON 4 to 7 Co2 -> Fb04 = ON: Monitoring with sensor

RüF2

05 RüL-RK2 OFF 4 to 7 Co2 -> Fb05 = ON: Return flow boost continuous control,

mode selector switch and state of BE16 (Frg_K2) Co2 -> Fb00 = OFF: Release K2 only depending on position

of mode selector switch

Co2 -> Fb01 = OFF: Operational alarm after start-up

Function block parameter:

Start-up time for boiler K2 / 0 to 5400 s (0 s)

Function block parameter: Initial value / 0 to 99999 (0 h) Option: count: Counting the operating hours

rESEt: Reset operating hours to initial value

Note: Can only be changed after entering the key number.

Co2 -> Fb03 = OFF: Monitoring with thermostat (BE6), Option: StEiG: Thermostat closes

FALL: Thermostat opens

Co2 -> Fb04 = OFF: Monitoring with thermostat (BE8), Option: StEiG: Thermostat closes

FALL: Thermostat opens

Modulation three-step control

Co2 -> Fb05 = OFF: Return flow boost three-step control

Modulation continuous control, systems Anl 3, 6 and 7 only

Function block parameters: K

(proportional gain) / 0.1 to 99.9 (6)

(reset time) / 0 to 999 s (120 s)

(derivative-action time) / 0 to 999 s (0 s)

With Co2 -> Fb05 = OFF additionally: T

(valve transit time) / 5 to 240 s (120 s)

84 EB 5474 EN

Page 85

Appendix

Fb Function WE Anl Function block parameter / Range of values (default setting) 06 Three-step pulsing/

on-off signal RüL-RK2

07 Modulation feedbackK2ON 7 Co2 -> Fb07 = ON: External feedback; the actually measured

Fb = Function block, WE = Default setting

ON 4 to 7 Co2 -> Fb06 = ON, only with Co2 -> Fb05 = OFF:

Three-step signal Co2 -> Fb06 = OFF: On-off signal

Function block parameters

Hysteresis / 1 to 30 °C (5°C) Min. activation time / 0 to 600 s (120 s) Min. deactivation time / 0 to 600 s (120 s)

resistance data are given

Function block parameters

Lower value (Start)=0%Modulation (0=1kΩ) Upper value (Stop) = 100 % Modulation (1000=2kΩ)

Co1 -> Fb07 = OFF: Internal feedback

Function block parameters:

(proportional gain) / 0.1 to 99.9 (2)

(reset time) / 0 to 999 s (30 s)

(derivative-action time) / 0 to 999 s (0 s)

(Modulation transit time) / 5 to 240 s (30 s)*

* Only when Co2 -> Fb05 = ON is also configured

EB 5474 EN 85

Page 86

Appendix

Co2: Separate heating circuit (systems Anl 1 to 3)

Note! The configuration table “Co2: Separate heating circuit” is only available in conjunction with configuration Co5 -> Fb13 = ON.

Fb Function WE Anl Function block parameter / Range of values (default setting) 00 Reserved 01 Return flow sensor

RüF2

OFF 1 to 3 Co2 -> Fb01 = ON: Return flow sensor active

09 Control circuit HK2

OFF 1 to 3 Co2 -> Fb09 = ON: HK2 = OFF

deactivated

10 Type of characteristic ON 1 to 3 Co2 -> Fb10 = ON: Weather-compensated control,

option: 1 4-point characteristic

2 Gradient characteristic

Co2 -> Fb10 = OFF: Fixed set point control

11 Summer mode ON 1 to 3 Co2 -> Fb11 = ON: Summer mode active

Function block parameters:

START summer mode/ 01.01 to 31.12 (01.06) STOP summer mode/ 01.01 to 31.12 (30.09) Outdoor temperature limit / 0 to 40 °C (18 °C)

14 Continuous control

RK2

15 Three-step pulsing/

on/off RK2

OFF 1 to 3 Co2 -> Fb14 = ON: Continuous control

Function block parameters:

(proportional gain) / 0.1 to 99.9 (6)

(reset time) / 0 to 999 s (120 s)

(derivative-action time) / 0 to 999 s (0 s)

ON 1 to 3 Co2 -> Fb15 = ON: Three-step pulsing

Function block parameters:

(proportional gain) / 0.1 to 99.9 (6)

(reset time) / 0 to 999 s (120 s)

(derivative-action time) / 0 to 999 s (0 s)

(valve transit time) / 5 to 240 s (120 s)

Co2 -> Fb15 = OFF: On/off switching

Fb = Function block, WE = Default setting

86 EB 5474 EN

Page 87

Appendix

Co2: Direct heating circuit)

Note! The configuration table “Co3: Direct heating circuit” is only available in conjunctionwith confi guration Co5 -> Fb13 = ON.

Fb Function WE Anl Function block parameter / Range of values (default setting) 00 Room sensor OFF 1 to 3 Co3 -> Fb00 = ON: Room sensor active

05 Optimization OFF 1 to 3 Co3 -> Fb05 = ON: option:

09 Control circuit HK3

OFF

10 Type of characteristic ON 1 to 3 Co3 -> Fb10 = ON: Weather-compensated control,

11 Summer mode ON 1 to 3 Co3 -> Fb11 = ON: Summer mode active

12 Potentiometer input OFF 1 to 3 Co3 -> Fb12 = ON: Connection to room panel

Fb = Function block, WE = Default setting

OFF 1 to 3 Co3 -> Fb09 = ON: HK2 = OFF

1 Activation acc. to outdoor temperature, deactivation

acc. to time schedule*

2 Activation acc. to outdoor temperature, deactivation

acc. to room sensor*

3 Activation and deactivation acc. to room sensor *Function block parameter:

Advance time / 0 to 360 min (120 min)

option: 1 4-point characteristic

2 Gradient characteristic

Co3 -> Fb10 = OFF: Fixed set point control

Function block parameters:

START summer mode/ 01.01 to 31.12 (01.06) STOP summer mode/ 01.01 to 31.12 (30.09) Outdoor temperature limit / 0 to 40 °C (18 °C)

EB 5474 EN 87

Page 88

Appendix

Co4: DHW heating

Fb Function WE Anl Function block parameter / Range of values (default setting)

00 DHW demand active ON 1 to 7 Co4 -> Fb00 = ON: DHW set point during DHW demand

Co4 -> Fb00 = OFF, only with Co5 -> Fb09 = OFF: External

change in lag/lead sequence 01 Reserved 02 DHW forced

charging

03 Storage tank sensor

SF1

04 Storage tank sensor

SF2

05 Reserved 06 DHW priority HK2 OFF 1 to 3*Co4 -> Fb06 = ON: HK2 in reduced operation during

07 DHW priority HK3 OFF 1 to 3*Co4 -> Fb07 = ON: Pump Pu3 switched off during storage

08 Thermal disinfection OFF 1 to 3*Co4 -> Fb08 = ON: Only if Co3 -> Fb03 = ON or

09 Reserved 10 Adopt vacations and

public holidays for DHW heating

Fb = Function block, WE = Default setting

OFF 1 to 7 Co4 -> Fb02 = ON: Monitoring VFg, KF1, KF2 for maximum

limit f. DHW forced charging

Function block parameter:

Maximum limit f. DHW forced charging / 20 to 120 °C (80 °C)

OFF 1 to 3*Co4 -> Fb03 = ON: Storage tank sensor SF1

Co4 -> Fb03 = OFF, only with CO4 -> Fb04 = OFF: Storage

tank thermostat

OFF 1 to 3*Co4 -> Fb04 = ON, only with Co4 -> Fb03 = OFF: Storage

tank sensor SF2

Co4 -> Fb04 = OFF: Only storage tank sensor SF1

storage tank charging

tank charging

Co4 -> Fb03 = ON and Co4 -> Fb04 = ON

Function block parameters:

Day of week / 0 = daily, 1 = Mon, 2 = Tue, …, 7 = Sun (3)

Disinfection temperature / 50 to 80 °C (70 °C)

Start time / 0:00 to 23:59 h (0:00 h)

Stop time / 0:00 to 23:59 h (4:00 h)

OFF 1 to 3*Co4 -> Fb10 = ON: Adopt vacations and public holidays

from Co2

88 EB 5474 EN

Page 89

Appendix

Co5: General functions

Fb Function WE Anl Function block parameter / Range of values (default setting)

00 Outdoor sensor ON 1 to 7 Co5 -> Fb00 = ON:

01 Delayed

outdoor tempera ture adaptation

02 Return flow sensor

total RüFg

03 Type of character-

istic

04 Configuration and

parameterization protection

05 Automatic summer

time/winter time changeover

06 Summer mode ON 1 to 7 Co5 -> Fb06 = ON: Summer mode active

07 Releasing sequence ON 4 to 7 Co5 -> Fb07 = ON: Temperature tAfor releasing sequence

08 – – For internal purposes only!

OFF 1 to 7 Co5 -> Fb01 = ON: Delay active; option:

ON 1 to 7 Co5 -> Fb02 = ON: Differential temperature control using

ON 1 to 7 Co5 -> Fb03 = ON: Weather-compensated control;

OFF 1 to 7 Co5 -> Fb04 = ON: Locking the configuration and

ON 1 to 7 Co5 -> Fb05 = ON: Automatic summer time/winter time

option: FUEHL: Sensor at input AF

0-10: 0 to 10 V outdoor temperature at input AE2

Function block parameter:

Frost protection limit / –30 to 20 °C (3 °C) Co5 -> Fb00 = OFF: Input as BE;

option: Lead OFF (FoAUS)

Frost protection BE (FroSt)

Ab: Delay on decreasing temperature AUFAB: Delay on decreasing and rising temperature

Function block parameter:

Delay / 1 to 6 °C/h (3 °C/h)

variable weighting factors;

Function block parameters:

Intended temperature difference / 0 to 90 °C (10 °C) Kp factor for differential temperature control / 0 to 1 (0.5)

option: 1: 4-point characteristic

2: Gradient characteristic

Co5 -> Fb03 = OFF: Fixed set point control

parameterization levels, except for Co5 -> Fb 04

Note: Can only be changed after entering the key number.

changeover

Function block parameters:

START summer mode / 01.01 to 31.12 (01.06) STOP summer mode / 01.01 to 31.12 (30.09) Outdoor temperature limit / 0 to 40 °C (18 °C)

Co5 -> Fb07 = OFF: Unrestricted sequence

EB 5474 EN 89

Page 90

Appendix

Fb Function WE Anl Function block parameter / Range of values (default setting) 09 Automatic change

in lag/lead se quence

10 Condition for

change in lag/lead sequence

11 Displaying

lead/collective alarm

12 Common return

flow boost

13 Heating circuit with

DHW heating

14 Continuous running

of pumps

15 External

demand (AE1)

16 Control signal

deactivation

ON 5, 7 Co5 -> Fb09 = ON: Change in lag/lead sequence as per

Co5 -> Fb09 = OFF: Change in lag/lead sequence only in the

ON 5, 7 Co5 -> Fb10 = ON: Change in lag/lead sequence acc. to

Co5 -> Fb10 = OFF: option: 1: Change in lag/lead sequence acc. to outdoor temperature 2: Change in lag/lead sequence acc. to capacity

OFF 5, 7 Co5 -> Fb11 = ON: Displaying lead

BA2 = 0 (Füh1), BA2 = 1 (Füh2) Co5 -> Fb11 = OFF: Displaying collective alarm with BA2

OFF 4 to 7 Co5 -> Fb12 = ON: RK1 as return flow boost for lead boiler

OFF 1 to 3

ON 1 to 7 Co5 -> Fb14 = ON: Continuous running of lead boiler pump

Function block parameters:

Pump lag time / 0 to 90 min (5 min) Boiler flow limit / 20 to 120 °C (55 °C)

OFF 1 to 7 Co5 -> Fb15 = ON: Function block parameter:

Boost / 0 to 30 °C (0 °C)

OFF 1 to 7 Co5 -> Fb16 = ON: Control signal deactivation after 3 x T

setting in Co5 -> Fb10

event of a malfunction

operating hours

19 Parallel operation

of boilers

20 Burner activation

not dependent on sensor VFg

Fb = Function block, WE = Default setting

OFF 7 Co5 -> Fb19 = ON: Both boilers operate in parallel regardless

OFF 4 to 7 Co5 -> Fb20 = ON: Boilers are controlled exclusively ac

90 EB 5474 EN

of the system load. The boilers are started up one after the other taking into account the delay and lockout times.

cording to the boiler sensors VF1 and VF2. VFg has no affect on the control loop.

Page 91

Co6: Sensor initialization

Fb Function WE Anl Comments

00 Global selection of

sensors Sensor input 1

Sensor input 17

ON Co6 -> Fb00 = ON: Pt 100, Pt 1000

Co6 -> Fb00 = OFF: Pt 100, PTC

OFF Co6 -> Fb01 to Fb17 = ON: Select sensor: 0–20 (mA),

4–20 (mA), Pt100, Pt1000, PtC, ntC, ni200, n1000 Co6 -> Fb01 to Fb17 = OFF: Same sensor selection as in

FB00

Appendix

23 Sensor calibration OFF Co6 -> Fb23 = ON: Sensor calibration of universal inputs

Fb = Function block, WE = Default setting

possible Co6 -> Fb23 = OFF: No sensor calibration

Co7: Error initialization

Fb Function SZ WE Comments

00 Reserved

BE1

BE17

in error status register

22 Limit monitoring OFF Can be configured over Modbus 23 Fault alarm binary

input changed

Fb = Function block, WE = Default setting, SZ = Key number

X OFF Co8 -> Fb01 = ON: Error alarm in error status register

to Co8 -> Fb17 = ON: Error alarm in error status register option: STEIG: Error alarm at BE1 to BE17 = CLOSED

FALL: Error alarm at BE1 to BE17 = OPEN

OFF Co8 -> Fb23 = ON: Subsequent errors are also added to the

error status register HR 60 (Bit D11)

EB 5474 EN 91

Page 92

Appendix

Co9: Modbus/meter bus

Fb Function SZ WE Function block parameter / Range of values (default setting)

00 Modbus ON Co9 -> Fb00 = ON: Modbus active

01 Modem function OFF Co9 -> Fb01 = ON: Modem function active 02 Modem dialing

procedure

03 Lock dial-up OFF Co9 -> Fb03 = ON: No dial-up in case an error

04 Modbus

16-bit addressing

05 Reserved 06 Text message alarm

to a mobile phone

07 SMS dialing

procedure

08 Reserved 09 Reserved 10 Alarm sent per fax OFF Co9 -> Fb10 = ON: Alarm sent per fax

11 Fax dialing

procedure

only with Co9 -> Fb06 = OFF and Co9 -> Fb10 = OFF

OFF Co9 -> Fb02 = ON: Pulse

Co9 -> Fb02 = OFF: Tone

Co9 -> Fb03 = OFF: Dial-up in case an error

OFF Co9 -> Fb04 = ON: 16-bit addressing

Co9 -> Fb04 = OFF: 8-bit addressing

OFF Co9 -> Fb06 = ON: Text message alarm to a mobile phone

only with Co9 -> Fb00 = OFF and Co9 -> Fb10 = OFF

OFF Co9 -> Fb07 = ON: Pulse

Co9 -> Fb07 = OFF: Tone

only with Co9 -> Fb00 = OFF and Co9 -> Fb06 = OFF

OFF Co9 -> Fb11 = ON: Pulse

Co9 -> Fb11 = OFF: Tone

Meter 1

Meter 3

Fb = Function block, WE = Default setting, SZ = Key number

OFF Co9 -> Fb21 = ON: Meter 1 is being processed

to Co9 -> Fb23 = ON: Meter 3 is being processed

Function block parameters:

Meter bus address for WMZ / 0 to 255 (255) Model code WMZ / P15, PS2,1434, CAL3, APAtO, SLS (1434) Reading mode WMZ / 24h, con, CoiL (con)

92 EB 5474 EN

Page 93

13.2 Parameter lists

PA1: Boiler 1 (systems Anl 1 to 7) PA2: Boiler 2 (systems Anl 4 to 7)

In the PA2 parameter level, “2” appears instead of “1” on the left of the display.

Appendix

Display Parameter designation

Range of values (default setting)

123

1211 1314

1617181920

2122

Maximum flow temperature KF1, 2

˚C

20 to 160 °C (90 °C)

123

1211 1314

1617181920

2122

Minimum return flow temperature RüF1, 2

˚C

20 to 120 °C

123

START

1211 1314

1617181920

2122

Minimum activation time for boiler K1, 2

0 to 90 min

min

This time must have elapsed before the boiler switched off.

123

1211 1314

1617181920

2122

Minimum deactivation time for boiler K1, 2

STOP

0 to 90 min

min

This time must have elapsed before the boiler switched on.

EB 5474 EN 93

Page 94

Appendix

PA2: Separate heating circuit (only in systems Anl 1 to 3 with Co5 -> Fb13 = ON) PA3: Direct heating circuit (only in systems Anl 1 to 3 with Co5 -> Fb13 = ON)

In the PA3 parameter level, “3” appears instead of “2” on the left of the display.

Display

123

Parameter designation

Range of values (default setting)

1211 13 14

1617181920

2122

4-point characteristic

Press to set parameters outdoor temperature (points 1 to 4) flow temperature (points 1 to 4) and set-back difference (points 2 to 3).

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, option: 1

1211 13 14

1617181920

2122

4-point characteristic, point 1: Outdoor temperature

˚C

Outdoor temperatures of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4.

–20 to 50 °C (Point 1: –10 °C, point 2: –5 °C, point 3: 5 °C, point 4: 10 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, option: 1

1211 13 14

1617181920

2122

4-point characteristic, point 1: Flow temperature

˚C

Flow temperatures of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4.

20 to 160 °C (Point 1: 90 °C, point 2: 80 °C, point 3: 68 °C, point 4: 50 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, option: 1

1211 13 14

1617181920

2122

4-point characteristic: Set-back difference, point 2

˚C

Set-back difference of the point 3 is marked by square below the number 3.

0 to 30 °C (Point 2: 15 °C, point 3: 20 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, option: 1

94 EB 5474 EN

Page 95

Appendix

Display

123

Parameter designation

Range of values (default setting)

1211 13 14

1617181920

2122

Gradient, flow

0.4 to 3.2 (1.8)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, select: 2.

1211 13 14

1617181920

2122

Level (parallel shift), flow

˚C

–30 to 30 °C (0 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, select: 2.

1211 13 14

1617181920

2122

˚C

Set-back difference

0 to 30 °C (15 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = ON, select: 2.

1211 13 14

1617181920

2122

Fixed set point control, flow temperature set point

˚C

20 to 160 °C (70 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = OFF

123

1211 13 14

1617181920

2122

Fixed set point control, set-back difference

˚C

0 to 30 °C (15 °C)

In PA2 (PA3) only with Co2 (Co3) -> Fb10 = OFF

EB 5474 EN 95

Page 96

Appendix

Display

123

Parameter designation

Range of values (default setting)

1211 13 14

1617181920

2122

Maximum flow temperature

˚C

20 to 160 °C (90 °C)

1211 13 14

1617181920

2122

Minimum flow temperature

˚C

20 to 120 °C (20 °C)

1211 13 14

1617181920

2122

Day set point (room set point)

˚C

10 to 40 °C (20 °C)

Only in PA3 with Co3 -> Fb00 = ON and Co3 -> Fb05 = ON

1211 13 14

1617181920

2122

Night set point (reduced room set point)

˚C

10 to 40 °C (17 °C)

123

96 EB 5474 EN

Only in PA3

1211 13 14

1617181920

2122

Sustained temperature

˚C

10 to 40 °C (10 °C)

Only in PA3

Page 97

Appendix

Display

123

START

123

STOP

123

456

Parameter designation

Range of values (default setting)

1211 13 14

1617181920

2122

Outdoor temperature deactivation value in reduced operation

˚C

–10 to 50 °C (10 °C)

1211 13 14

1617181920

2122

Outdoor temperature deactivation value in rated operation

˚C

0 to 50 °C (22 °C)

1211 1314

1617181920

2122

Times-of-use

1–7: daily 1, 2, …, 7: Monday, Tuesday, …, Sunday

1211 1314

1617181920

2122

Vacations

Max. 10 vacation periods

123

1211 1314

1617181920

2122

Public holidays

Max. 20 public holidays

min

EB 5474 EN 97

Page 98

Appendix

Display

123

Parameter designation

Range of values (default setting)

1211 1314

1617181920

2122

Boiler set point for DHW demand

˚C

20 to 120 °C (65 °C)

1211 1314

1617181920

2122

DHW demand ON (SF1)

˚C

20 to 90 °C (40 °C)

1211 1314

1617181920

2122

DHW demand OFF

˚C

20 to 90 °C (45 °C)

Only with Co4 -> Fb03 = ON and Co4 -> Fb04 = ON

1211 1314

1617181920

2122

Hysteresis (only if SF1 is selected)

˚C

0 to 30 °C (5 °C)

123

98 EB 5474 EN

Only with Co4 -> Fb03 = ON and Co4 -> Fb04 = OFF

1211 1314

1617181920

2122

Times-of-use for DHW 1–7: daily

1, 2, …, 7: Monday, Tuesday, …, Sunday

Page 99

PA5: General parameters

Appendix

Display Parameter designation

Range of values (default setting)

9876543210

123

1211 13 14

1617181920

242322212019181716151413121110

Time

242322212019181716151413121110

Date (Day – Month)

242322212019181716151413121110

Date (Year)

2122

4-point characteristic

Press to set parameters

outdoor temperature (points 1 to 4) flow temperature (points 1 to 4) and set-back difference (points 2 to 3).

Only with Co5 -> Fb03 = ON, option: 1

EB 5474 EN 99

Page 100

Appendix

Display Parameter designation

Range of values (default setting)

123

1211 13 14

1617181920

2122

4-point characteristic, point 1: Outdoor temperature

˚C

Outdoor temperatures of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4.

–20 to 50 °C (Point 1: –10 °C, point 2: –5 °C, point 3: 5 °C, point 4: 10 °C)

Only with Co5 -> Fb03 = ON, option: 1

123

1211 13 14

1617181920

2122

4-point characteristic, point 1: Flow temperature

˚C

Flow temperatures of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4.

20 to 160 °C (Point 1: 90 °C, point 2: 80 °C, point 3: 68 °C, point 4: 50 °C)

Only with Co5 -> Fb03 = ON, option: 1

123

1211 13 14

1617181920

2122

4-point characteristic: Set-back difference, point 2

˚C

Set-back difference of the point 3 is marked by square below the number 3.

0 to 30 °C (Point 2: 15 °C, point 3: 20 °C)

Only with Co5 -> Fb03 = ON, option: 1

123

1211 13 14

1617181920

2122

Gradient, flow

123

100 EB 5474 EN

0.4 to 3.2 (1.8)

Only with Co5 -> Fb03 = ON, option: 2

1211 13 14

1617181920

2122

Level (parallel shift), flow

˚C

–30 to 30 °C (0 °C)

Only with Co5 -> Fb03 = ON, option: 2