Samson 5476 User Manual

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Automation System 5400 Heating and District Heating Controller TROVIS 5476

Electronics from SAMSON

Mounting and Operating Instructions

EB 5476 EN

Firmware version 2.3x Edition December 2004

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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.

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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 . . . . . . . . . . . . . . . . . . . . . . . . 12

1.6.1 Entering public holidays . . . . . . . . . . . . . . . . . . . . . . . . 14

1.6.2 Entering vacation periods . . . . . . . . . . . . . . . . . . . . . . . 15

1.7 Correcting temperature set points . . . . . . . . . . . . . . . . . . . 16

2 Start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Setting the system code number . . . . . . . . . . . . . . . . . . . . 17

2.2 Activating and deactivating functions. . . . . . . . . . . . . . . . . . 17

2.3 Changing parameters . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4 Enter key number . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.5 Calibrating sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.6 Resetting to default values . . . . . . . . . . . . . . . . . . . . . . . 21

3 Manual operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4 Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5 Functions of the heating circuit . . . . . . . . . . . . . . . . . . . . 40

5.1 Weather-compensated control . . . . . . . . . . . . . . . . . . . . . 40

5.1.1 Gradient characteristic . . . . . . . . . . . . . . . . . . . . . . . . 41

5.1.2 4-point characteristic . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.2 Fixed set point control . . . . . . . . . . . . . . . . . . . . . . . . . 43

5.3 Underfloor heating . . . . . . . . . . . . . . . . . . . . . . . . . . 43

5.4 Deactivation depending on outdoor temperature . . . . . . . . . . . . 44

5.4.1 OT deactivation value in rated operation . . . . . . . . . . . . . . . . 44

5.4.2 OT deactivation value in reduced operation . . . . . . . . . . . . . . 44

5.4.3 Summer mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5.5 Delayed outdoor temperature adaptation. . . . . . . . . . . . . . . . 45

5.6 Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.7 Optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5.8 Flash adaptation . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

5.9 Adaptation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

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Contents

5.10 Pump management . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.11 Potentiometer input . . . . . . . . . . . . . . . . . . . . . . . . . . 48

6 Functions of the DHW circuit. . . . . . . . . . . . . . . . . . . . . . 49

6.1 DHW heating in the storage tank system . . . . . . . . . . . . . . . . 49

6.2 DHW heating in the storage tank charging system . . . . . . . . . . . 51

6.3 DHW heating with solar system (Anl 2, 3, 4, 5 und 9) . . . . . . . . . 53

6.4 DHW heating in instantaneous heating system (Anl 6). . . . . . . . . . 53

6.5 Circulation pump operation during storage tank charging. . . . . . . . 54

6.6 Circulation over the heat exchanger . . . . . . . . . . . . . . . . . . 54

6.7 Intermediate heating operation (Anl 2, 3 and 9) . . . . . . . . . . . . 54

6.8 Parallel pump operation (Anl 2, 3 and 9). . . . . . . . . . . . . . . . 54

6.9 Priority circuit (Anl 4, 5, 6, 7, 8 and 11) . . . . . . . . . . . . . . . . 55

6.9.1 Reverse control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.9.2 Set-back operation . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.10 Forced charging of the DHW storage tank (Anl 2, 3, 5, 7, 8 and 9) . . . 56

6.11 Thermal disinfection of the DHW storage tank . . . . . . . . . . . . . 56

7 System-wide functions . . . . . . . . . . . . . . . . . . . . . . . . 57

7.1 Automatic summer time/winter time changeover . . . . . . . . . . . . 57

7.2 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.3 Forced operation of the pumps. . . . . . . . . . . . . . . . . . . . . 57

7.4 Return flow temperature limitation . . . . . . . . . . . . . . . . . . . 57

7.5 Condensate accumulation control . . . . . . . . . . . . . . . . . . . 59

7.6 Three-step control . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.7 On/off control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

7.8 Releasing a control circuit over the binary input. . . . . . . . . . . . . 60

7.9 Processing of external demand in RK1 . . . . . . . . . . . . . . . . . 60

7.10 Flow rate/capacity limitation. . . . . . . . . . . . . . . . . . . . . . 61

7.10.1 Limitation using pulse input . . . . . . . . . . . . . . . . . . . . . . 61

7.10.2 Limitation using 0/4 to 20 mA signal. . . . . . . . . . . . . . . . . . 62

7.11 Locking manual levels . . . . . . . . . . . . . . . . . . . . . . . . . 62

7.12 Setting a customized key number. . . . . . . . . . . . . . . . . . . . 63

8 Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.1 Sensor failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.2 Collective error alarm . . . . . . . . . . . . . . . . . . . . . . . . . 64

8.3 Temperature monitoring . . . . . . . . . . . . . . . . . . . . . . . . 65

8.4 Error status register . . . . . . . . . . . . . . . . . . . . . . . . . . 65

9 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

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Contents

9.1 Controller with RS-232-C port . . . . . . . . . . . . . . . . . . . . . 67

9.2 Controller with serial RS-485 interface . . . . . . . . . . . . . . . . . 68

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

9.4 Meter bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9.4.1 Activating the meter bus . . . . . . . . . . . . . . . . . . . . . . . . 71

9.4.2 Flow rate and/or capacity limitation via meter bus . . . . . . . . . . . 71

9.5 Memory module. . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

10 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

11 Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . 77

12 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

12.1 Function block list . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

12.2 Parameter list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

12.3 Sensor resistance tables . . . . . . . . . . . . . . . . . . . . . . . . 99

12.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

12.5 Customer data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Most frequently used abbreviations . . . . . . . . . . . . . . . . . . 105

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

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Operation

1 Operation

The controller is ready for use with the temperatures and operating schedules preset by the manufacturer. 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 (–> Fig. 11 on page 112)

– Press to switch between operating level and configuration level and from configuration level to the parameter level

Reset key

Press to reset accessible parameters to their default settings; the controller must be in the parameter level

Arrow keys (–> Fig. 11 on page 112) – To scroll within levels – To change values – To switch from the parameter level into the configuration level

(press both arrow keys simultaneously)

Enter key

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

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1.1.2 Operating switches

Heating circuit mode selector switch

Automatic mode with switchover between rated operation and reduced operation or standby mode

Day mode (rated operation) Night mode (reduced operation) or standby mode Manual operation: Control valve RK1 open -stationary -closes

UP1 in operation, no reaction in switch position

DHW circuit mode selector switch · Underfloor heating circuit (Anl 9)

Automatic mode with deactivation of DHW heating Heating circuit(s) deactivated, frost protection only

DHW heating unchanged Manual operation: Control valve RK2 open -stationary -closes

Operation

Correction switch

Correction of flow temperature set point in times-of-use to become warmer (+) or colder (–) ΔT characteristic) Adaptation operation only when switch position is at 0

Flow max

= ±4 °C x Gradient of the heating characteristic (±10 °C for 4-point

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Operation

1.2 Operating modes

Day mode (rated operation)

Regardless of the programmed times-of-use,the setpoints relevantfor ratedoperation areused by the controller.

Night mode (reduced operation)

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

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, unless control operation is deactivated de pending on the outdoor temperature. The controller switches automatically between both oper ating modes.

Manual operation

Valves and pumps can be controlled manually (–> section 3). The default setting of the circulation pumps(for theheating circuit) is set for constant operation.

+0–

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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.

2 3 4

6 7

8 9 10 11 12 13 14 15

1 Automatic operation 2 Day mode (rated oper.) 3 Night mode

(reduced operation) 4 Vacation mode 5 Public holiday mode 6 Malfunction 7 Frost protection

Fig. 1 · Icons

8 Heating pump UP 9 Heating demand 10 Heating valve: OPEN,

CLOSED

11 Storage tank charging

pump SLP 12 Solar circuit pump CP 13 DHW demand

14 DHW exchanger charging

pump TLP, Anl 9: UP2

15 DHW valve:

OPEN, CLOSED, Anl 9: Mixer for underfloor heating circuit

16 Times-of-use

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

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Operation

1.4 Displaying data

Measured values, set points, times-of-use, public holidays and vacation periods as well as tem peratures of the connected sensors and their set points can beretrieved anddisplayed inthe op erating level.

Proceed as follows:

Select value. The various datapoints appear one after the other on the display depending on the con figuration (–> Fig. 11 on page 112).

Outdoor temperature

Temperature at flow sensor VF in heating circuit 1, 2

Temperature at return flow sensor RüF1

Room temperature

Temperature at flow sensor VF1 while DHW is active Temperature at flow sensor in DHW circuit VF2 – VF3

Temperature at DHW sensor VF2

Temperature at storage tank sensors SF1–SF2

Temperature at return flow sensor in DHW circuit RüF2

Temperature at solar collector sensor CF

Time schedule for heating

, Time schedule for DHW circuit

Public holidays

Vacation periods

Compare the set point or limit with the actual measured temperature. By pressing the enter key when the time appears on the display, a status alarm of the system bus interface appears when the Modbus operation is active. If the system bus interface is not used accordingly,

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PAUSE

appears on the display.

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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.

The time is set in the parameter level.

Proceed as follows:

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Switch to the parameter level. Display: Time, blinks

Activate editing mode for the controller time.

blinks. Change controller time. Confirm controller time.

Display: Date (day.month) Change date setting. Confirm date.

Display: Year. Change year setting. Confirm year. Return to the operating level.

Note!

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

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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.

The times schedules are set for the required control circuits one after the other in the parameter level.

Time schedule Display Heating circuit 1

Heating circuit 2 (Anl 9: underfloor heating circuit) (second set of parameters after datapoint for vacation mode)

DHW circuit Circulation pump

Parameters of the heating circuit

Period/day 1–7 1–7, 1–5, 5–6, 1, 2, 3, 4, 5, 6, 7 with

Start first time-of-use 7:00 00:00 to 24:00h; in steps of 30 minutes Stop first time-of-use 12:00 00:00 to 24:00h; in steps of 30 minutes Start second time-of-use 12:00 00:00 to 24:00h; in steps of 30 minutes Stop second time-of-use 22:00 00:00 to 24:00h; in steps of 30 minutes

WE Range of values

1–7 = daily, 1–5 = Monday to Friday 6–7 = Saturday to Sunday 1 = Monday, 2 = Tuesday, …, 7 = Sunday

Proceed as follows:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Switch to the parameter level. Display: Time, blinks

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Operation

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Select datapoint for times-of-use. Display:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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 1–5 = Monday to Friday 6–7 = Saturday to Sunday 1 = Monday, 2 = Tuesday, …, 7 = Sunday

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

START

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

Edit start time (steps of 30 minutes). 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.

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

Note!

Do not use the 1–7 , 1–5 und 6–7 menus to check the programmed times-of-use. On opening this period, the times-of-use are reset to their default settings.

Note!

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

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Operation

1.6.1 Entering public holidays

On public holidays, the times-of-use specified for Sunday apply. A maximum of 20 public holi days may be entered.

The public holidays are set in the parameter level. Set the function block FB6 = ON to make the programmed public holidays also apply to the

DHW heating.

Parameter

Public holidays – Configurable as required

WE Range of value

Proceed as follows: Switch to the parameter level.

Display: Time, blinks

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Select datapoint for public holidays. Display:

Open data point for public holidays.

– – – –

If applicable, select

Activate editing mode for public holiday.

blinks. Edit public holiday. Confirm public holiday.

––––

To enter additional public holidays, re-select

(between 31.12 and 01.01) and repeat the

steps in the fields highlighted in gray.

Return to the operating level.

Note!

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.

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Operation

1.6.2 Entering vacation periods

During vacation periods, the controller constantly remains in the reduced operating mode. The system is monitored for frost. A maximum of 10 vacation periods can be entered.

The vacation periods are set in the parameter level. Set the function block FB6 = ON to make the programmed vacations also apply to the DHW

heating.

Parameter

Vacation period – Configurable as required

Proceed as follows: Switch to the parameter level.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

To enter additional vacation periods, re-select the steps in the fields highlighted in gray.

Return to the operating level.

WE Range of value

Display: Time, blinks Select datapoint for vacation periods.

Display: Open datapoint for vacation periods.

Display: START

– – – –

If applicable, select

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

Note!

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.

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Operation

Deleting vacation periods:

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

– – – –

Delete vacation period.

1.7 Correcting temperature set points

The room temperature for the heating circuit can be adapted to the actually valid conditions at the correction switch:

Slide correction switch in + direction:

The flow temperature is increased and the room temperature becomes warmer. Slide correction switch in – direction:

The flow temperature is reduced and the room temperature becomes cooler.

Note!

The operation of the underfloor heating in system Anl 9 remains unaffected.

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Start-up

2 Start-up

2.1 Setting the system code number

10 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, 6 and 7.

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 configuration level.

Proceed as follows: Switch to the parameter level.

Display shows: Time, blinks

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Switch to the configuration level. Display shows: Current system code number,

blink

Activate editing mode for system code number. “Anl“ blinks on the display.

Set system code number. Confirm system code number.

Exit the configuration level. Return to the operating level.

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 first level of the display shows the function blocks 0 to 23 and the second level shows the status of function blocks 24 to 47.

The function blocks are described in section 12.1.

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Start-up

Proceed as follows:

Switch to the parameter level. Display shows: Time, blinks

Switch to the configuration level. Display shows: Current system code number, blink.

Select level displaying function blocks 0 to 23 or Select level displaying function blocks 24 to 47. Select function block. Activate editing mode for function block.

The function block number starts to blink.

0 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 five minutes.

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Start-up

2.3 Changing parameters

Depending on the set system code number and the activated functions, not all parameters listed in the parameter list in the Appendix (–> section 12.2) might be available.

Proceed as follows:

Switch to the parameter level. Display shows: Time, blinks Select parameter. Activate editing mode for parameter.

Parameters which do not allow the editing mode to activated are protected by a key number. These parameters can only be altered as long as the key number is active af ter selecting a protected function block (e.g. FB20) (–> section 2.4).

Change parameter. Confirm parameter setting.

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

Return to the operating level.

Note! Thecontroller automaticallyreturns to the operating level if the keys are left unpressedfor five minutes.

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 106. To avoid unauthorized use of the key number, remove the page or make the key number unreadable.

Proceed as follows:

0 0 0 0

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, whereas the display does not blink when an incorrect key number is entered. The key number remains active for approx. 5 minutes if the keys are left unpressed during this time.

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Start-up

2.5 Calibrating sensors

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

FB16 = ON, select “P1000“: Pt 1000 and Pt 100 sensors

FB16 = ON, select “ntc“: NTC and Pt 100 sensors

FB16 = OFF: PTC and Pt 100 sensors (default setting)

The resistance values of the sensors can be found on page 98. 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 FB33. The function block FB33 always remains activated.

Proceed as follows:

Switch to the parameter level. Display: Time, blinks

Switch to the configuration level. Display: Current system code number (Anl), blink

Select function block level 24 to 47. Select function block FB33. Activate function block FB33.

Display: Enter currently valid key number.

Display: Flow sensor, measured temperature

0 0 0 0 0

Flow sensor (VF1)

If necessary, select other sensors that you want to calibrate.

Outdoor sensor (AF)

Room sensor (RF)

Return flow sensor (RüF1)

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Return flow sensor (RüF2)

Solar circuit collector sensor (CF)

Flow sensor (VF2)

Storage tank sensor (SF1–SF2)

Flow sensor in DHW circuit (VF3) Activate editing mode for sensor. 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.

Exit the configuration level. Return to the operating level.

2.6 Resetting to default values

Start-up

All parameters and function blocks from any parameter level can be reset 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 function block settings are kept.

Note!

The controller isready foroperation with its default settings. You just need to set the correctdate and current time.

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Manual operation

3 Manual operation

Heating circuit and DHW circuit (Anl 9: underfloor heating circuit) can be set to manual mode at their operating mode selector switches.

Heating circuit mode selector switch

The heating circuit can only be set to manual mode when the DHW/underfloor heating circuit mode selector switch is not positioned at .

+0–

Anl 1, 2, 3

Anl 4, 5, 6, 11

Anl 7, 8

Anl 9

UP1 on, SLP/TLP off, valve RK1 opens

UP1 on, valve RK1 opens

UP1 on, valve RK2 stationary, valve RK1 opens

UP1 on, SLP off, valve RK2 stationary, valve RK1 opens

UP1 on, SLP/TLP off, valve RK1 stationary

UP1 on, valve RK1 stationary

UP1 on, valve RK2 stationary, valve RK1 stationary

UP1 on, SLP off, valve RK2 stationary, valve RK1 stationary

UP1 off, SLP/TLP off, valve RK1 closes

UP1 on, valve RK1 closes

UP1 on, valve RK2 stationary, valve RK1 closes

UP1 on, SLP off, valve RK2 stationary, valve RK1 closes

DHW circuit mode selector switch (system Anl 9: underfloor heating circuit)

+0–

Anl 2, 3

Anl 4, 5, 6, 11

Anl 7, 8

Anl 9

UP1 off, SLP/TLP on, charging temp. control

SLP/TLP on, valve RK2 opens

SLP/TLP on, valve RK1 stationary, valve RK2 opens

UP1 on, SLP on, valve RK1 stationary, valve RK2 opens

DHW heating inactive DHW heating inactive

SLP/TLP on, valve RK2 stationary

SLP/TLP on, valve RK1 stationary, valve RK2 stationary

UP2 on, SLP off, valve RK1 stationary, valve RK2 stationary

SLP/TLP on, valve RK2 closes

SLP/TLP on, valve RK1 stationary, valve RK2 closes

UP2 on, SLP off, valve RK1 stationary, valve RK2 closes

Note! In manual mode, frost protection is not guaranteed (–> section 7.2).

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Page 23

4 Systems

10 hydraulic schematics are available.

Systems

System code number (Anl) Heating Outdoor temperature dependent flow temperature control with

Mixing control ••• From the primary circuit ••• • From the secondary circuit •• ••• in storage tank system •• •• in st. tank charging system •• •• in instantaneous heating sys. •

DHW heating

Mixing control • Solar system possible** •••• •

* The system Anl 9 is designed for the control a radiator in conjunction with an underfloor heating

circuit.

** The solar circuit is activated with the function block setting FB15 = ON, select “CF“. Further

parameters (

to influence the solar-operated DHW heating.

Solar circuit pump ON,Solar circuit pump OFF

123456789* 11

variable return flow temperature limitation

and

Solar charging OFF

) are available

EB 5476 EN 23

Page 24

Systems

System Anl 1

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1

24 EB 5476 EN

Page 25

System Anl 2

Default settings

Systems

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = OFF Without SF2

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Page 26

Systems

System Anl 2, setting different from default setting · With switch valve

Setting different from default setting: FB9 = ON, select “US“

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = OFF Without SF2

26 EB 5476 EN

Page 27

System Anl 2, setting different from default setting · With solar system

Solar collector

Setting different from default setting: FB15 = ON, select “CF“

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “CF“ With SF2

Systems

EB 5476 EN 27

Page 28

Systems

System Anl 3

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “---“ With SF2 FB27 = OFF Without VF3

28 EB 5476 EN

Page 29

System Anl 3, setting different from default setting · With solar system

Solar

collector

Setting different from default setting: FB15 = ON, select “CF“

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “CF“ With SF2 FB27 = OFF Without VF3

Systems

EB 5476 EN 29

Page 30

Systems

System Anl 4

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1 FB21 = OFF Without RüF2

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Page 31

System Anl 4, setting different from default setting · With solar system

Solar collector

Setting different from default setting: FB15 = ON

FB13 = OFF Without RF FB15 = ON With SF2 FB20 = ON With RüF1 FB21 = OFF Without RüF2

Systems

EB 5476 EN 31

Page 32

Systems

System Anl 5

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “---“ With SF2 FB21 = OFF Without RüF2

32 EB 5476 EN

Page 33

System Anl 5, setting different from default setting · With solar system

Solar

collector

Setting different from default setting: FB15 = ON, select “CF“

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “CF“ With SF2 FB21 = OFF Without RüF2

Systems

EB 5476 EN 33

Page 34

Systems

System Anl 6

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1

34 EB 5476 EN

Page 35

System Anl 7

Default settings

Systems

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = OFF Without SF2

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Page 36

Systems

System Anl 8

Default settings

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON With SF2 FB27 = OFF Without VF3

36 EB 5476 EN

Page 37

System Anl 9

Default settings

Systems

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = OFF Without SF2

EB 5476 EN 37

Page 38

Systems

System Anl 9, setting different from default setting · With solar system

Solar collector

Setting different from default setting: FB15 = ON, select “CF“

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON, select “CF“ With SF2

38 EB 5476 EN

Page 39

System Anl 11

Default settings

Systems

FB13 = OFF Without RF FB20 = ON With RüF1 FB14 = ON With SF1 FB15 = ON With SF2 FB21 = OFF Without RüF2 FB27 = OFF Without VF3

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Functions of the heating circuit

5 Functions of the heating circuit

Which controller functions are available depends on the selected system code number (Anl).

5.1 Weather-compensated control

When weather-compensated control is used, the flow temperature is controlled according to the outdoor temperature. The heating characteristic in the controller defines the flow temperature set point as afunction ofthe outdoortemperature (–>Fig. 2).The outdoor temperature required for weather-compensated control is measured at the outdoor sensor or received over a current input.

tVLFlow temperature

Outdoor temperature

Fig. 2 · Gradient characteristics

Measured at the outdoor sensor

Function

Outdoor temperature – Current input OFF FB18 = OFF

WE Configuration

Received over (0)4 to 20 mA current input (a 50Ωresistor must be connect to terminals 7(+) and GND (terminals ½) parallel to the current signal)

40 EB 5476 EN

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Functions of the heating circuit

Function

Outdoor temperature – Current input OFF FB18 = ON

WE Configuration

0: 0 to 20 mA = –20 to 50 °C 4: 4 to 20 mA = –20 to 50 °C

5.1.1 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

Function

Characteristics OFF FB19 = OFF

Parameters

Gradient, flow 1.8 0.8 0.2 to 3.2 Level, flow 0 °C –5 °C –30 to 30 °C Set-back difference 15 °C 5 °C 0 to 50 °C Min. flow temperature 20 °C 20 °C 20 to 130 °C Max. flow temperature 90 °C 50 °C 20 to 130 °C

Gradient

in alower flowtemperature. The

= Flow set point–Set-back difference

and

Gradient

Min. flowtemperature

and

Level

parameters, you can adapt the charac

Gradient

WE Configuration

WE WE* Range of values

* Default setting applies to system Anl 9, floor heating

results in a higher flow tempera

Level

parameter performsa parallel

parameters markthe upperand lowerlim-

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Functions of the heating circuit

5.1.2 4-point characteristic

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

. The

temperature

Set-back difference

is reduced outside the times-of-use. The

Outdoor temperature

at points 2 and 3 indicates how much the flow temperature

Max. flow temperature

rameters mark the upper and lower limits of the flow temperature.

Fig. 3 · 4-point characteristic

, the

Flow temperature

and

P1 to P4 Points 1 to 4 t

... min Minimum flow temperature ... max Maximum flow temperature

----- Set-back characteristic

Flow temperature Outdoor temperature

and the

Min. flow temperature

Return flow

Function

Characteristic OFF FB19 = ON

Parameters

Outdoor temperature, point 1 Outdoor temperature, point 2 Outdoor temperature, point 3 Outdoor temperature, point 4

Flow temperature, point 1 Flow temperature, point 2 Flow temperature, point 3 Flow temperature, point 4

Return flow temperature, point 1 Return flow temperature, point 2 Return flow temperature, point 3 Return flow temperature, point 4

Set-back difference, points 2, 3 20 °C 5 °C 0 to 50 °C Max. flow temperature 90 °C 50 °C 20 to 130 °C

WE Configuration

WE WE* Range of values

–15 °C

–5 °C

5 °C

15 °C 70 °C

55 °C 40 °C 25 °C

65 °C 50 °C 35 °C 20 °C

–15 °C

–5 °C

5 °C

15 °C

50 °C 40 °C 35 °C 20 °C

– – – –

–30 to 20 °C

20 to 130 °C

20 to 90 °C

42 EB 5476 EN

Page 43

Functions of the heating circuit

Parameters

Min. flow temperature 20 °C 20 °C 20 to 130 °C

WE WE* Range of values

* Default setting applies to system Anl 9, floor heating

5.2 Fixed set point control

During the times-of-use, the flow temperature can be controlled according to a fixed set point. Outside the times-of-use, this set point is reduced by the

and

flow temperature

Parameters

Max. flow temperature 90 °C 50 °C 20 to 130 °C Min. flow temperature 20 °C 20 °C 20 to 130 °C

Maximum flow temperature

WE WE* Range of values

* Default setting applies to system Anl 9, underfloor heating

Set-back difference

parameters are set to identical values.

. Both

Minimum

5.3 Underfloor heating

The system Anl 9 is designed for radiator heating in conjunction with an underfloor heating circuit. The maximum flow temperature of the radiator circuit is only available to the underfloor heating circuit. If the radiator circuit is in rated operation, its flow temperature is only reduced so far to ensure that the flow temperature of the underfloor heating circuit does not fall below the temperature according to the heating characteristic for the control circuit RK2. If the radiator circuit is switched off due to the outside temperature, the controller still continues to regulate a flow temperature according to the heating characteristic for the control circuit RK1 at the flow sensor VF1 despite of the deactivated circulation pump UP1.

Functions such as Optimization, Adaptation or Flash adaptation are only available for the ra diator circuit after regulating the temperature according to the room temperature. A connected remote operation also only has an influence on the operation of the radiator circuit. The summer mode causes both heating circuits to be switched off. The

rated operation reduced operation

parameter relates to both heating circuits, whereas the

parameter only effects the radiator circuit.

OT deactivation value in

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Page 44

Functions of the heating circuit

5.4 Deactivation depending on outdoor temperature

5.4.1 OT deactivation value in rated operation

If theoutdoor temperatureduring ratedoperation exceeds the limit

operation

, theaffected heatingcircuit isput outof serviceimmediately. Thevalve isclosed and the

OT deactivationvalue inrated

pump is switched off after a lag time. When the outdoor temperature falls below this value (less

0.5 °C hysteresis), heating operation is restarted immediately. With the default settings, this means that, during the warm season, the system is switched off at

an outdoor temperature of 22 °C.

Parameter

OT deactivation value in rated operation

WE Range of values 22 °C 0 to 50 °C

5.4.2 OT deactivation value in reduced operation

If the outdoor temperature during reduced operation exceeds the limit

reduced operation

, the affected heating circuit is put out of service immediately. The valve is closed and the pump is switched off after a lag time. When the outdoor temperature falls below this value (less 0.5 °C hysteresis), heating operation is restarted immediately.

With the default settings, this means that, at night, the system is switched off at an outdoor temperature of 15°C to save energy. Nevertheless, remember that the system requires some time in the morning to heat up the building

Parameter

OT deactivation value in reduced operation

WE Range of values 15 °C –10 to 50 °C

OT deactivation value in

5.4.3 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 in summer mode

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

on the next day, summer mode is deactivated on the following day.

mode

Outdoor temperature limit in summer

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Page 45

Functions of the heating circuit

Function

Summer mode OFF

WE Configuration

FB3 = 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 30 °C

5.5 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 de creases. 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

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 direct sunshine.

Function

Delayed outdoor temperature adaptation OFF

WE Configuration

FB4 = ON Ab/AufAb (Delay on decreasing/decreasing and

increasing temperature)

3 °C/h

Delay / 0.2 to 6.0 °C/h

°°12

5.6 Remote operation

Apart from measuring the room temperature, the Type 5244 Room Sensor (PTC sensor) and Type 5257-5 Room Sensor (Pt 1000 sensor) offer the following opportunities of influencing the control process:

Selection of the operating mode:

– Automatic mode – Day mode – Night mode Set point correction: during rated operation, the room temperature set point can be in

creased or reduced by up to 5 °C using a continuously adjustable rotary knob.

When the room sensor is activated, the measured room temperature is displayed. Nevertheless, it is not used for control unless the Optimization, Adaptation,orFlash adaptation functions

EB 5476 EN 45

Page 46

Functions of the heating circuit

have been activated. Refer to page 78 onwards for the wiring diagrams of the room panels.

Functions

Room sensor RF OFF FB13 = ON Potentiometer input 1 to 2 kΩ OFF FB24 = OFF

WE Configuration

5.7 Optimization

This function requires the use of a room sensor. Depending on the building characteristics, the controller determines and adapts the required preheating time (maximum 6 hours) to ensure that the desired

Room set point

room when the time-of-use starts. During the preheating period, the controller heats with the max. flow temperature. This temperature is built up in steps of 10 °C. As soon as the

has been reached, weather-compensated control is activated.

point

Depending on the room sensor, the controller switches off the heating system up to two hours before the time-of-use ends. The controller chooses the deactivation time such that the room temperature does not drop significantly below the desired value until thetime-of-use ends.It two times-of-use are programmed for one day, the controller monitors the in the timebetween thesetimes-of-use. Outsidethe times-of-use, the controller monitors the

tained temperature.

Should the temperature fall below the heats with the max. flow temperature until the measured room temperature exceeds the adjusted value by 1 °C.

During the preheating period, DHW heating does not take place in systems with DHW circuits linked in the secondary side.

(rated room temperature) has been reached in the reference

Room set

Reduced room set point

Sus-

Sustained temperature,

the controller

Note!

Direct sunshine can cause theroom temperatureto increaseand thusresult inthe prematurede activation of the heating system.

Function

Optimization OFF FB0 = ON

Parameter

Room set point 20 °C 0 to 40 °C Reduced room set point 17 °C 0 to 40 °C Sustained temperature 15 °C 0 to 40 °C

WE Configuration

WE Range of values

46 EB 5476 EN

Page 47

Functions of the heating circuit

5.8 Flash adaptation

The function is only active in automatic mode ( ). Direct reactionsto deviationsin room temperature can be achieved using the function blockset ting: FB2 = ON. A gradient characteristic (FB19 = OFF) must be configured. Flash adaptation counteracts room temperature deviations by increasing or decreasing the level of the heating characteristic by up to 5 °C. The corrections are made after 10 minutes by 1 °C. The corrected value is indicatedin theparameter level under the datapoint for

Note!

Cooling loads, such as drafts or open windows, affect the control process! Rooms may be temporarily overheated when the cooling load has been eliminated!

Level, flow.

Functions

Flash adaptation OFF FB2 = ON Characteristic OFF FB19 = OFF

Parameter

Room set point 20 °C 0 to 40 °C

WE Configuration

WE Range of values

5.9 Adaptation

The function is only active in automatic mode ( ). The controller is capable of automatically adapting the heating characteristic to the building characteristics, provided a gradient characteristic has been set (FB19 = OFF). The reference room, where the room sensor is located, represents the entire building and is monitored to en sure that the

Room set point

rated operation deviates from the adjusted set point, the heating characteristic is modified ac cordingly for the following time-of-use. The corrected value is displayed in the parameter level

Gradient, flow

under

Function

Adaptation OFF FB1 = ON Characteristics OFF FB19 = OFF

Parameter

Room set point 20 °C 0 to 40 °C

is maintained. When the mean measured room temperature in

WE Configuration

WE Range of values

EB 5476 EN 47

Page 48

Functions of the heating circuit

5.10 Pump management

The Pump management function can be usedfor theheating circuit (circulation pump UP1). The binary outputs BA8 and BA9 should always be used to control the operation ofthis pumpwhen ever a speed-controlled pump is implemented in the heating circuit:

BA8 switches the pump on/off

BA9 releases the speed controlin rated operation or sets the pump to minimum speed oper

ation during reduced operation

BA8 isclosed if the circulation pump is to be switchedon. The binary output BA9 can be config ured with function block FB28:

FB28 = ON: BA9 = OFF outside times-of-use

FB28 = OFF: BA9 = ON outside times-of-use

Function

Pump management OFF FB28

WE Configuration

5.11 Potentiometer input

Terminal 12 can be used for the connection of a potentiometer, e.g. to indicate the valve position in percent on the controller display or at the control station.

Function

Potentiometer input 1 to 2 kΩ OFF FB24 = ON

WE Configuration

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Functions of the DHW circuit

6 Functions of the DHW circuit

6.1 DHW heating in the storage tank system

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

Fig. 4 · DHW heating in a storage tank system

Start storage tank charging

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

DHW heating ON

tank thermostat: DHW heating from the secondary circuit (Anl 2, 7, 9):

If the flow temperature of the system (in system Anl 9: of the radiator circuit) is higher than the required charging temperature, the controller tries to reduce the temperature in the heating circuit side for three minutes at the maximum before the storage tank charging pump starts to operate. If the flow temperature of the system is lower than the required charging temperature, the charging pump first start to run when the temperature at the affected flow sensor reaches the temperature currently measured at sensor SF1 or the flow temperature could be raised at least by 10 K. If heatingoperation isnot taking place, the storage tank charging pump is switchedon immedi ately.

or the temperature adjusted at the storage

Note!

The function block setting FB20 = ON provides two switching conditions for the storage tank charging pump (SLP) thatcan beselected(–> section7.4) whenthe heatingcircuits are switched off: (1) SLP switched on regardless of the return flow temperature (2) SLP switched on depending on the return flow temperature

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Page 50

Functions of the DHW circuit

DHW heating from the primary circuit (Anl 4): The control valve opens depending on the

DHW temperature

from its closed position.

Stop storage tank charging

The controller stops charging the storage tank when the water temperature in the storage tank measured at sensor SF1 reaches the value T =

DHW heating ON+Hysteresis

. In systems with two storagetank sensors, the controller stops charging the storage tankwhen the water temper ature in the storage tank measured at sensor SF2 reaches the value tems with storage tank thermostat, the

Hysteresis

of the thermostat determines when the storage

DHW heating OFF

.Insys

tank charging is finished. When ahigh flowtemperature is required by the system, the storage tankcharging pump is im mediately switched off. If no heating is taking place or if the flow temperature demand in the system is lower, the

End charging process

parameter applies for switching off the storage tank charging pump. The storage tank charging pump is switched off at the latest after two transit time periods of the control valve (2 x T

Functions

Storage sensor SF1 ON FB14 Storage sensor SF2 OFF FB15 Return flow sensor RüF1 ON FB20

Parameters

DHW heating ON 45 °C 20 to 90 °C DHW heating OFF 50 °C 20 to 90 °C Hysteresis 5 °C 0 to 30 °C Charging temperature 55 °C 20 to 90 °C Stop charging 53 °C 20 to 90 °C DHW temperature 55 °C 20 to 90 °C

WE Configuration

WE Range of values

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Functions of the DHW circuit

6.2 DHW heating in the storage tank charging system

SF1 Storage tank sensor 1 SF2 Storage tank sensor 2 SLP Storage tank charging pump VF Flow sensor TLP Heat exchanger charging pump ZP Circulation pump KW Cold water WW Hot water

Fig. 5 · DHW heating in a storage tank charging system

Start storage tank charging

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

DHW heating ON

tank thermostat: DHW heating from the secondary circuit (Anl 3, 8):

If the flow temperature of the system is higher than the required charging temperature, the controller tries to reduce the temperature on the heating circuit side three minutes at the maximum before the storage tank charging pump starts. If heating operation is not taking place or the flow temperaturein thesystem islower, the storage tank charging pump is switched on immediately. If the currently measured temperature at sensor VF is reached, the storage tank charging pump is switched on.

DHW heating from the primary circuit (Anl 5, 11): The storage tank charging pump (Anl 5) or the heat exchanger charging pump (Anl 11) is started immediately. The controller regulates the temperature to the

or the temperature adjusted at the storage

Charging temperature

Note!

In systems Anl 3, 8 and 11, the charging temperature in the storage tank charging circuit is re gulated over the flow sensor VF3 when it is activated on switching on the storage tank charging pump. The heat exchanger inlet temperature is monitoredat sensorVF1 (Anl3) orVF2. Ifit reachesthe

Heat exchanger inlet temperature limit

, the limit isused asthe basisfor theset pointfor thefollo

wing heat exchanger inlet temperature control.

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Functions of the DHW circuit

Stop storage tank charging

The controller stops charging the storage tank when the water temperature in the storage tank measured at sensor SF1 reaches the value T =

DHW heating ON+Hysteresis

Hysteresis

of the thermostat determines when the storage

DHW heating OFF

.Insys

tank charging is finished. DHW heating from the secondary circuit (Anl 3, 8):

When a high flow temperature is required by the system, the heat exchanger charging pump is immediately switched off. If no heating is taking place or if the flow temperature demand in the system is lower, the

End charging process

parameter applies for switching off the heat exchanger charging pump. The heat exchanger charging pump is switched off at the latest after two transit time periods of the control valve (2 x T

); 15 seconds after the heat exchanger charging pump has been

switched off, the storage tank charging pump stops operating. DHW heating from the primary circuit (Anl 5, 11):

The storage tank charging pump (Anl 5) or the heat exchanger charging pump (Anl 11) is switched offwhen the temperature reaches

End chargingprocess

ever, two transit time periods of the DHW control valve (2 x T

parameter, atthe latest, how-

In system Anl 11, 15 seconds after the heat exchanger charging pump has been switched off, the storage tank charging pump stops operating.

Functions

Storage tank sensor SF1 ON FB14 Storage tank sensor SF2 ON FB15 Flow sensor VF3 OFF FB27

Parameters

DHW heating ON 45 °C 20 to 90 °C DHW heating OFF 50 °C 20 to 90 °C Hysteresis 5 °C 0 to 30 °C Charging temperature 55 °C 20 to 90 °C End charging process 53 °C 20 to 90 °C Heat exchanger inlet temperature limit 120 °C 20 to 130 °C

WE Configuration

WE Range of values

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Functions of the DHW circuit

6.3 DHW heating with solar system (Anl 2, 3, 4, 5 und 9)

The systems Anl 2, 3, 4, 5 and 9 include a solar system for DHW heating. In these systems, the difference between the temperatures measured at storage sensor SF2 and the sensor at the so lar collector CFis determined.The

Solar pump ON

parameter determines theminimum temper ature differencebetween sensors SF2 and CF required toactivate the solar pump. If thetemper ature difference falls below the value of

Solar pump OFF,

the solar pump is switched off. Ba sically, the solar pump is also switched off when the water temperature measured at sensor SF2 has reached the

Solar charging OFF

parameter. The times-of-use of the DHW circuit do not have any influence on the operationof the solar sys tem. After the key number 1990 has been set, the operating hours of the solar pump are dis played in extended operating level.

Function

Storage tank sensor SF2 FB15 = ON, select “CF“ Parameters

Solar circuit pump ON 10 °C 0 to 30 °C Solar circuit pump OFF 2 °C 0 to 30 °C Solar charging OFF 70 °C 20 to 90 °C

WE Configuration

WE Range of values

6.4 DHW heating in instantaneous heating system (Anl 6)

The controller regulatesthe DHWoutlet temperatureof the heat exchanger according to the ad-

DHW temperature

justed

. The circulation pump works accordingto thetime schedule.We stronglyrecommend tooperate the circulation pump during times-of-use of the DHW circuit (–> section 6.5). To keep temperature peaks caused by load changes as small as possible, it is absolutely neces sary that a temperature sensor with short response times (e.g. Type 5207-xx6x Pt 1000 Sen sor) to measure the DHW outlet temperature. In addition, an actuator with a transit time of around 20 seconds should be used.

Note!

The control parameter setting has great influence on the control accuracy in the case of DHW heating in instantaneous heating systems.

Parameter

DHW temperature 55 °C 20 to 90 °C

WE Range of values

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Functions of the DHW circuit

6.5 Circulation pump operation during storage tank charging

With the setting FB26 = ON, the circulation pump continues operation according to the pro grammed time schedule even during storage tank charging. With the setting FB26 = OFF, the circulation pump is switched off as soon as the storage tank charging pump is activated. The circulation pump returns to operate according to the time schedule when the storage tank charging pump has been switched off again.

Function

Circulation pump OFF FB26

WE Configuration

6.6 Circulation over the heat exchanger

In systems, in which the DHW heating takes place in the storage tank charging system from the primary circuit (Anl 5, 11), it is possible to keep the control of the charging temperature even when the active storage tank charges are finished.

Function

Circulation over the heat exchanger OFF FB32 = ON

WE Configuration

6.7 Intermediate heating operation (Anl 2, 3 and 9)

With thesetting FB9 = OFF, heating operation of the UP1 heating circuitis reactivated for a period of 10 minutes after 20 minutes of priority (heating deactivated during DHW heating). During this time, DHW heating is interrupted.

Function

Parallel pump operation OFF FB9 = OFF, select “20“

WE Configuration

Note! In system Anl 2 with circulation pump and switchover valve, the Intermediate heating operati on function, set FB9 = ON and select “US“ and “20“.

6.8 Parallel pump operation (Anl 2, 3 and 9)

When the Parallel pump operation function is activated, the circulation pump UP1 remains switched on during DHW heating unless certain operating situations occur. These situations in clude, for example, those when the boost of the flow temperature exceeds 10 °C, or when the maximum flow temperature is exceeded. In this case, the controller appliespriority operation,if necessary with intermediate heating.

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Functions of the DHW circuit

Once a parallel pump operation cycle has been activated and the time for

has elapsed, system deviations greater than 5 °C cause the controller to suspend parallel

tion

Stop parallel opera

operation for 10 minutes and to apply priority operation.

Function

Parallel pump operation OFF

WE Configuration

FB9 = ON, PU

10 min

Stop parallel operation / 2 to 10 min

Note!

In system Anl 9, the control valve of the underfloor heating circuit is always closed with the function block setting FB9 = OFF. With the setting FB9 = ON, select“PU“ to ensure it remains in control operation even the parallel operation has been interrupted due to system deviations.

6.9 Priority circuit (Anl 4, 5, 6, 7, 8 and 11)

In many district heating systems with primary DHW heating, the allotted amount of wateris only intended to supply the heating system. As a result, the capacity required for DHW heating needs tobe taken from the heatingsystem when great heating loads occur;and this, until DHW heating has been concluded. Nevertheless, heating operation is not simply to be interrupted. Only the amount of energy required for DHW heating is to be deducted. This can be achieved by using the priority functions

Reverse control and Set-back operation.

6.9.1 Reverse control

The capacity demand of the heating circuit is reduced when there is a system deviation of more than 5 °C in the DHW circuit. This is achieved by the three-step output of the DHW circuit work ing in the opposite direction compared to the heating circuit control valve. The amount of time in which the priority for the DHW circuit is given is set in the

of deviation

Function

Priority for DHW circuit

parameter.

WE Configuration OFF

FB8 = ON, select “In“

10 min

Priority in case of deviation / 2 to 10 min

Priority in case

6.9.2 Set-back operation

The heating circuit is set back to reduced operation for 20 minutes when a system deviation of more than 5 °C arises in the DHW circuit. Its capacity demand is reduced by the value in

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Functions of the DHW circuit

Set-back difference

The amount of time in which the priority for the DHW circuit is given is set in the

of deviation

Function

Priority for DHW circuit

by set-back of the current flow temperature.

parameter.

WE Configuration OFF

10 min

FB8 = ON, Ab Priority in case of deviation / 2 to 10 min

Priority in case

6.10 Forced charging of the DHW storage tank (Anl 2, 3, 5, 7, 8 and 9)

This function is always configured when the system has at least one storage tank sensor. To provide the full room heating performance when the time-of-use of the heating circuits be gins, existing storage tanks are charged one hour before the time-of-use of the heating circuits starts.

6.11 Thermal disinfection of the DHW storage tank

In all systems with DHW heating, the DHW storage tank is thermally disinfected on a selected day of the week or every day. The storage tank is heated up to 70 °C. Thermal disinfection starts at 0.00h and finishes at 4.00h at the latest.

Thermal disinfection for preventing legionella infection causes

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

tion suspended), high storage 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.

Function

Thermal disinfection OFF

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WE Configuration

FB7 = ON

3 (Mi)

Day of the week / 1–7 = daily, 1, 2 to 7 = Mon, Tue to Sun

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System-wide functions

7 System-wide functions

7.1 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 FB5 = ON

WE Configuration

7.2 Frost protection

When outdoortemperatures below3 °C occur, the heating circulation pumps UP1 and UP2are switched on. The controllers regulates the temperature to a flow temperature set point of 20 °C. The circulation pump for the DHW circuit is likewise switched on. Outside the DHW heating times-of-use, the temperature in the DHW storage tank is additionally kept at 5 °C, provided a storage tank thermostat is not used. In conjunction with a storage tank thermostat, the frost protection function does not work outside the times-of-use.

Note!

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

7.3 Forced operation of the pumps

When the heating circuit pumps have not been activated for 24 hours, forced operation of the pumps is started between 00.00h and 00.01h. This is done to avoid that the pumps get stuck when they are not operated for a longer periodof time.The forced operation of the storage tank or heat exchanger charging pump is operated between 00.01h and 00.02h.

7.4 Return flow temperature limitation

The temperature difference between the flow and return flow indicates how well the energy is used: the greater the difference, the higher the efficiency. A return flow sensor is sufficient to evaluate the temperature difference when the flow temperatures are preset. The return flow tem perature can be limited either to a value depending on the outdoor temperature (variable) or to a fixed set point. When the temperature measured at return flow sensor RüF exceeds the limit value, the set point of the flow temperature (flow temperature of the heating system, charging temperature) is reduced. As a result, the primary flow rate is reduced and the return flow tem perature falls. The values are exceeded in either direction.

Limiting factor

determines how strongly the controller responds when the limit

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System-wide functions

The measured temperature reading (return flow temperature) and the set point reading (flow temperature of the heating, charging temperature) blink to indicate that a return flow limitation is active in the control circuit concerned. In systems Anl 2, 3, 7, 8 and 9, the

tion temperature

parameter during DHW heating is used for limitation in the primary circuit

Return flow limita

while the DHW heating is active. The systems Anl 4, 5, 6 and 11 allow a separate return flow sensor to be installed in the DHW circuit. To ensure that the preset

Return flow temperature limit temperature during DHWheating

can be met, make sure that: – the heating characteristic is not adjusted to ascend too steeply, – the speed of the circulation pumps is not set too high, – the heating systems have been calibrated.

Note!

For outdoor temperature dependent control with gradient characteristic, the return flow tempe rature islimited tofixed set point by entering the same value for both

and

perature

Minimum return flow temperature

parameters.

Maximum returnflow tem-

Functions

Return flow sensor RüF1 ON1FB20 = ON

Return flow sensor RüF2 OFF1FB21 = ON

Parameters

Gradient, return flow 1.2 0.2 to 3.2 Level, return flow 0 °C –30 to 30 °C Maximum return flow temperature 65 °C 20 to 90 °C Minimum return flow temperature 65 °C 20 to 90 °C Return flow temperature limit temperature during

DHW heating

WE Configuration

Limiting factor / 0.1 to 10

WE Range of values

65 °C 20 to 90 °C

Note!

In systems Anl 2, 5, 7 and 9 Thefunction block setting FB20 = ON or FB21 = ON provides two switching conditions for the storage tank charging pump (SLP) that can be selected when the heating circuits are switched off: (1) SLP switched on regardless of the return flow temperature (2) SLP switched on depending on the return flow temperature

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System-wide functions

7.5 Condensate accumulation control

Activate the Limitation of the system deviation for OPEN signal function to start up condensate accumulation plants, in particular to avoid problematic excess temperatures. The controller re sponse to set point deviations which cause the primary valve to open is attenuated. The control ler response to set point deviations which cause the control valve to close remains unaffected.

Function

Limitation of the system deviation for OPEN signal RK1/RK2

WE Configuration OFF

2 °C

FB11/FB12 = ON Maximum system deviation / 2 to 10 °C

Note!

The condensate accumulation control function can only be activated when no on/offcontrol has been configured, i.e. when FB10 = ON or FB17 = ON.

7.6 Three-step control

The flow temperature can be controlled using a PI algorithm. The valve reacts to pulses that the controller emits when a system deviation occurs. The length of the first pulse, in particular, depends on the extent of the system deviation and the selected length increases as K

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

Proportional gain K

system deviation has been eliminated. The pause length between the single pulses is greatly influenced by the

Transit time T

The

Reset time T

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

(the pause length increases as TNincreases).

100 %.

Functions

Three-step control for RK1 ON

Three-step control for RK2 ON

* WE applies to systems Anl 5, 6; TN= 200 s, TY= 90 s applies for system Anl 4

WE Configuration

FB10 = ON

0.5 200 s 90 s 2 x T

0.5 60 s* 30 s*

(proportional gain) / 0.1 to 50

(reset time) / 1 to 999 s

(valve transit time) / 15 to 240 s

Pump lag time / 1 x T

FB17 = ON

(proportional gain) / 0.1 to 50

(reset time) / 1 to 999 s

(valve transit time) / 15 to 240 s

to 10 x T

(the pulse

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System-wide functions

7.7 On/off control

The flow temperature can be controlled by an on/off signal. The controlled valve is opened when the flow temperature falls below the set point by T = 0.5 x perature exceeds the set point by T = 0.5 x

Hysteresis

Function

On/off control for RK1/RK2 ON

selected, the lower the switching frequency.

WE Configuration

5 °C

Hysteresis

FB10/FB17 = OFF Hysteresis / 1 to 30 °C

, the control valve is closed. The greaterthe

Hysteresis

. When the flow tem

7.8 Releasing a control circuit over the binary input

The release of a control circuit using the binary output only becomes effective when the respec tive control circuit is in automatic mode (icon ). The released control circuits alwayswork in automatic mode; the deactivated control circuit behaves as if it were in frost protection mode if the outdoor temperature requires it. The control circuit can be released via the binary input when the binary input is open (BE = ON).

Function

Releasing a control circuit OFF FB25 = ON, FErn

WE Configuration

Note!

The function cannot be selected in systems Anl 4, 5 and 9 with solar system and in system Anl 11 with VF3.

7.9 Processing of external demand in RK1

Regardless of the operating mode, except form manual mode, of the control circuit RK1, the controller uses the

Minimum flow temperature for external demand

closed (BE1 = ON). The DHW heating from the secondary circuit and demands of the heating circuit whichare higher than the

Minimum flowtemperature for external demand

In systems Anl 7 and 8, a mixing control is not active, just the set point of the heating circuit changes. The deactivated binary input (BE1 = OFF) does not have any effect on the control.

Function

External demand over BE1 OFF

WE Configuration

FB25 = ON, bed

20 °C

Minimum flow temperature for external demand / 20 to 130 °C

when the binary input is

have priority.

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System-wide functions

Note!

The function cannot be selected in systems Anl 4, 5 and 9 with solar system and in system Anl 11 with VF3.

7.10 Flow rate/capacity limitation

Flow rate/capacity limitation can be implemented based on a pulse or standardized signal of 0/4 to 20 mA provided by the heat meter. This only applies in plants without solar system. Par ticularly when a standardized signal is applied, a heat meter (flow meter) with high measuring accuracy is required. It must be ensured that the controller is supplied with updated measured values in intervals of max. 5 seconds. In system Anl 1, just the maximum limit for the flow rate or capacity can be entered.

7.10.1 Limitation using pulse input

A connected heat meter (terminals GND/15) with pulse output can be used to limit either the flow rate or the capacity in the system. Two different maximum limits can be set:

Maximum limit

Maximum limit for DHW

exclusively for DHW heating

All limit values are given in the unit “pulses per hour“ [pulse/h]. As a result, the controller does not distinguish between a flow rate pulse signal ora capacitypulse signal. As the displayed current pulse rate P [pulse/h] is calculated depending on the interval between the received pulses, it is natural that the controller cannot react immediately to all rapid flow rate or capacity changes which occur in the system. When the pulse rate reaches the current strongly the controller responds is determined by the In systems Anl 4 to 6 and 11, the control circuit with lowest set limit in the set point is always re duced.

Example to determine the limit:

If a capacity of 30 kW is to be limited, the following limit value must be set for a heat meter with an output of one pulse per kilowatt-hour:

Max. limit

30 kW

1KWh/pulse

, the current flow set point is reduced. How

Limiting factor

30 pulse / h==

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System-wide functions

Functions

Current input for flow rate measurement

Flow rate or capacity limitation OFF

WE Configuration OFF FB22 = OFF

FB23 = ON

500 pulse/h

1.0 500 pulse/h

1.0

Max. limit / 3 to 500 pulse/h Limiting factor / 0.1 to 10 Max. limit for DHW/3to500pulse/h Limiting factor / 0.1 to 10

7.10.2 Limitation using 0/4 to 20 mA signal

A connected heat meter (terminals GND/15 with a 50Ωresistor connected in parallel) with a 0/4 to20 mA output can be usedto limit the flow rate in the system. All limit values are givenin the unit “cubic meters per hour“ [m

measuring range value

0 or 4 mA also an 20 mA signal is issued) in unit [m the controller switches in control circuit RK1 to flow rate control with the as the set point. If the flow temperature exceeds its normal set point by more than 5 °C during this time, the flow temperature control is started again. If the flow rate falls below the set

mum limit,

the control valve of control circuit RK1 is temporarily closed. The normal control op-

eration is started again when the flow temperature falls below its normal set point by 5 °C.

Note!

In systems Anl 4 to 6 and 11, the valve of the heating circuit is affected during an active flow rate limitation.

/h]. As a result, it is necessary to se in addition to

Upper measuring range value

/h]. When the flow rate reaches the current

(flow rate at which the

Maximum limit

Lower

acting

Mini-

Functions

Current input for flow rate measurement OFF FB22 = ON, select “Lower measuring range”

Flow rate or capacity limitation OFF

WE Configuration

FB23 = ON

10.00 m3/h

0.01 m

9.00 m

Upper measuring range / 0.1 to 650 m

Minimum limit/ 0.01 to 650 m

Maximum limit / 0.01 to 650 m

7.11 Locking manual levels

The number of access options to the controller can be restricted by locking the manual level. When the locking is active, the mode switches positioned at the manual mode do not have any effect concerning manual activation of the valves. Merely, reactions occur as if the mode

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System-wide functions

switches were set to “Night mode” or Heating circuit(s) deactivated” or “DHW heating un changed”.

Function

Locking manual levels OFF FB34 = ON

WE Configuration

7.12 Setting a customized key number

Switch to the parameter level. Display shows: Time, blinks

Switch to the configuration level. Display shows: Currently valid system code number, blink

Select a function block (e.g. FB20) protected by the key number. Open the function block.

0 0 0 0 0

Set 01995 as the key number. Confirm the key number.

Display shows: 00100 Enter current key number. Confirm current key number. Set new key number between 00100 and 01900. Confirm new key number.

This new key number is now the active key number.

appears on the display.

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Operational faults

8 Operational faults

Malfunctions or faults are indicated by the icon blinking on the display.

8.1 Sensor failure

The following list explains how the controller responds to the failure of the different sensors. Safety functions such as frost protection and excess temperature protection no longer work when a sensor fails.

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

set point of 50 °C or the than 50 °C). Flow sensor in heating circuit VF1/VF2: When the flow sensor is defective, the controller

continues to work with the associated valve in the 30 % valve position. DHW heating which uses such a sensor to measure the charging temperatureis interrupted.In systemsAnl 4, 5, 6 and 11, the failure of flow sensor VF2 cause the DHW control valve to close. Flow sensor in DHW circuit VF3: When the flow sensor VF3 is defective, the DHW heating

takes place without change in lag/lead sequence. Return flow sensor RüF1/RüF2: The controller continues to function without the return tem-

perature limitation when the return flow sensor fails. Room sensor RF: The controller functions using the settings for operation without room sen-

sor when the room sensor fails. For example, optimization mode switches to the reduced operation mode. Adaptation mode is interrupted. The last defined heating characteristic is not changed anymore. Storage tank sensor SF1/SF 2: When one of the sensors fail, DHW heating no longer takes

place. Solar circuit sensor SF2/CF: When one of the sensors fails, the solar circuit pump is

switched off.

Max. flow temperature

(when the

Max. flow temperature

is smaller

8.2 Collective error alarm

As an alternative to the Pump management function, a fault alarm can be indicated over the bi nary output BA8. Should the error status register FSr indicate a fault, the binary output BA8 is activated.

Function

Fault alarm output BA8 OFF FB47 = ON

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WE Configuration

Page 65

8.3 Temperature monitoring

Operational faults

Should a deviation arise in a control circuit that is greater than 10 °C for longer than 30 min utes, the bit D12 is automatically set in the error status register.

If this function is not required, configure FB36 = ON, select “steig“ and leave the input BE8 unswitched.

8.4 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.

BITMAP error status register (FSr)

Number = Bit no. in HR 0 123456789101112131415 A set bit is indicated by on the

right of number 2 Sensor breakage D_0 Default values read D_1 DHW set point not reached D_2 Mode switch HK faulty D_3 Mode switch DHW faulty D_4

BE1 = active + (FB43 = ON) D_5

BE2 = active + (FB42 = ON) D_6

BE3 = active + (FB41 = ON) D_7

BE4 = active + (FB40 = ON) D_8

BE5 = active + (FB39 = ON) D_9

BE6 = active + (FB38 = ON) D_10

BE7 = active + (FB37 = ON) D_11

BE8 = active + (FB36 = ON) D_12 Data error alarm from WMZ D_13 Meter bus communication error D_14 Unauthorized access D_15

The binary inputs BE1 to BE8 appear in the error status register whenever the associated function block FB_ = ON

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

0212223242526272829210211212213214215

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Communication

Example of a transfer to the control system:

The error status register is transferred as a word <w> in a holding register (HR) whose value is calculated as follows: <w> = D_0 + D_1 + … + D_15 = 2

+ 21+ … + 2

9 Communication

Using the serial system bus interface, the TROVIS 5476 Heating Controller can communicate with abuilding control system. In combination with asuitable software for process visualization 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 four-wire bus at the RS-485 system bus interface To establish the link between computer and bus line, the signal level needs to be converted by a converter (SAMSON’s TROVIS 5484 Converter).

Fig. 6 · Network structure

The TROVIS 5476 Controller is fitted with either a RS-485 port or a RS-232-C port depending on the order. The optional operation between both versions or a conversion to a different port version is not possible.

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Communication

9.1 Controller with RS-232-C 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. By pressing the enter key when the time appears on the display, the following status information is shown:

FrEE: No communication, but the modem is ready

PAUSE: Interval between dialing has not yet elapsed since the last attempt

Conn: Connection currently established

RinG: Incoming call

Init: Modem is initialized

CALL: Controller dialing control

EndE: Connection is cut

Additionally, the building control station can dial the controller, poll it and send it new data after writing to the holding register no. 92 with valid key number. The Alternative recipient function is used by the controller after a programmablenumber of dialing attempts to the building control station has been completed.

(appears only briefly, if it appears for longer period, the modem has not responded with” OK“ and ATZ (–> page 70) is repeated)

Note!

If a wrongkey numberhas beenwritten to holding register no. 92 for the third consecutive time, the controller immediately interrupts the modem connection and generates an alarm (Unautho rized access occurred). As aresult, thecall tothe configuredcontrol systemis triggered.Bit D15 is deleted as soon as the error status register has been read by the control system and the con nection has been terminated.

In special cases, the Lock dial-up function can be selected to stop dial-up in case an error oc curs. 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.

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Communication

Functions

Modem operation OFF

Alternative recipient OFF

Lock dial-up OFF FB35 Dial-up also upon corrected error OFF FB45

Parameters* Station address (ST-NO) 255 1 to 247 ( 8 bit)

Baud rate (BAUD) 9600 150 to 9600

* –> Section 9.3 (”Description of communication parameters to be adjusted“)

WE Configuration

FB44 = ON

8 bit 30 min 5 min 5 min PULS –

WE Range of values

8 bit/16 bit Cyclical initialization In* / 0 to 255 min Dialing pause to GLT PA* / 0 to 255 min Modem timeout t Dial procedure / PULS/ton Phone no. of control station GLT*

FB46

Number of dialing attempts An* / 0 to 99

–

Phone number of alternative recipient*

1 to 999 (16 bit)

* / 0 to 99 min

Fig. 7 · Pin assignment of RS-232 port (left) and RS-485 port (right)

9.2 Controller with serial RS-485 interface

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.

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Communication

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.

Function

Modem operation OFF

Parameters* Station address 255 1 to 247 ( 8 bit)

Baud rate 9600 150 to 9600

* –> Section 9.3 (”Description of communication parameters to be adjusted“)

WE Configuration

FB44 = OFF

8 bit WE Range of values

8 bit/16 bit

1 to 999 (16 bit)

9.3 Description of communication parameters to be adjusted

Station address (ST.-NO)

This address is used to identify the controller in bus or modem mode. In a system, each controller 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 (In)

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.

Dialing pause to the control station (PA)

It is recommendable to pause for approx. 3 to 5 minutes between dialing up to the control sys tem to avoid a permanent overloading of the telecommunications network. The

the control station

defines the interval between 2 dialing attempts.

Dialing pause to

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Communication

Modem time-out (t0)

When the controller connects to the GLT but without addressing a Modbus data point, the con nection isclosed after the time specified for

Modem time-out

has elapsed.If the error status reg ister has not been read during the GLT connection, the controller dials up tothe GLT again after the

Dialing pause to the control station

(PA) has elapsed.

Number of redialing attempts (An)

The controller tries to dial up to the control system again, observing the

control station

, in case the GLT is busy or the function that triggered the call has not been reset

Dialing pause to the

by the controller. After the specified number of redialing attempts have failed, the controller di als the alternative recipient.

Phone number of control station/alternative recipient

Enter the phone number of the control system modem/alternative recipient 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 23 characters. Example: “069, 2sec. pause, 4009, 1 sec. pause, 0“:069PP4009P0–(=11characters)

9.4 Meter bus interface

The TROVIS 5476 Heating and District Heating Controller can communicate with up to 3 heat and water meters according to EN 1434-3. A flow rate or capacity limitation is possible on the basis of the values measured at heat meter WMZ1. Details on the useof thedifferent heator watermeters canbe found in the technical documentation TV-SK 6311.

Fig. 8 · View from the back of the controller

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Note!

Locate red jumper to the left with the meter bus operation using the supply voltage

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Communication

Note!

A 15 V DC supply voltage (+15 V at terminal15 connectedto themeter bus connection terminal

3) can be used at the WMZ connection of TROVIS 5476 Controller when the red jumper on the back of the controller is located pointing towards the edge of the controller (Fig. 8). Otherwise, the meter bus module in the heat meter is supplied. Furthermore, the heat meter is galvanically connected with controller input side (pulse and current input at terminal 15) resulting it being connected to the Modbus interface as well which can lead to the communication coming to a standstill.

9.4.1 Activating the meter bus

To successfully transfer data from the heat meter to the controller, the heat meter must use a standardized protocol in accordance with EN 1434-3. It isnot possibleto make a general state ment about which specific data can be accessed in each meter.For detailson thedifferent meter makes, refer to the technical documentation TV-SK6311. All necessary function blockparameters to set up the communication with heat or water meters are availablein functionblock FB29. The meter bus address, the model code and the reading mode must be specified for the heat meters WMZ1 to WMZ3. A meter bus address must be unique and correspond with the address preset in the WMZ.If the preset meter bus address is unknown, asingle heat meter connected tothe controller can be assigned themeter bus address 254. The address 255 deactivates thecommunication with the respective WMZ. The model code to be set for the heatmeter canbe foundin TV-SK6311. In general, the defaultsetting of1434 canbe usedfor most devices. The meters can be read either automatically every 24 hours (approx.), continuously or when the coils (= Modbus data points) assigned to the heat meters WMZ1 to WMZ3 are overwritten with the value 1 via the system bus interface.

Function

Meter bus OFF

WE Configuration

FB29 = ON

254* 1434 Cont

* WE for WMZ 2 and 3: 255

Meter bus address for WMZ 1 to 3 (ST.-NO) / 0 to 255 Model code WMZ 1 to 3 / 1434, CAL3, APAtO, SLS Reading mode WMZ 1 to 3 / 24h, Cont, CoiL

9.4.2 Flow rate and/or capacity limitation via meter bus

Similar to the flow rate limitation based on astandardized 0/4to 20mA signal, the update rate of the measured variable, flow rate and/or capacity, must be smaller than 5 seconds in meter bus operation to carry out a properlimitation. Referto the technical documentation TV-SK 6311

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Installation

for details on which listed heat meters fulfill this criterion and can be used for limitation pur poses. In case of battery-operated heat meters in particular, please note that some makes react with communication intervals if they are polled too frequently. Other makes could use up their bat teries too quickly. The technical documentation TV-SK 6311 provides more details on these matters.

A system with simultaneous room heating and DHW heating requires maximum energy.

A system with a fully charged storage tank which performs only room heating requires less

energy. A system which suspends room heating during DHW heating requires less energy.

As a result, three different maximum limit values can be specified:

Max. limit value

Max. limit value for heating

Max. limit value for DHW

In all systems without DHW heating or without heating circuit, only the flow rate or capacity can be set.

Flow rate limitation

The settings which are to made for the flow rate limitation are mainly contained in function block FB30as function block parameters. Only after selectingthe type of limitation “At“ for outdoor temperature dependent limitation (which automatically means a 4-point characteristic), four outdoor temperature dependent maximum limits for heating need to be set in the 4-point characteristic menu. After selecting “- - -“, set

and

heating

order. The are exceeded in either direction.

Function

Meter bus OFF

Limiting factor

to determine the absolute upper limit

for exclusive operation of the room heating

for exclusive operation of the DHW heating

Maximum limit for the system,Maximum limit for

Maximum limit for DHW,Minimum limit

determines how strongly the controller responds when the limit values

WE Configuration

FB29 = ON

254** 1434 Cont

** WE for WMZ2 and 3: 255

Meter bus address for WMZ 1 to 3 (ST.-NO) / 0 to 255 Model code WMZ 1 to 3 / 1434, CAL3, APAtO, SLS Reading mode WMZ 1 to 3 / 24h, Cont, CoiL

and the

Max. limit value

Limiting factor

for the

that appear in this

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Appendix

Function

Flow rate limitation OFF

WE Configuration

FB30 = ON At/---

2.0

1.0

Maximum limit / 0.01 to 650

Maximum limit for heating* / 0.01 to 650

Maximum limit for DHW / 0.01 to 650

Minimum limit/ 0.01 to 650

Limiting factor / 0.1 to 10.0

* Does not need to be set on selecting “At“

Parameter*

WE Range of values Maximum limit for heating, points 1 to 4 2.0 m3/h 0.01 to 100 m3/h * Parameter only needs setting with FB30 = ON, select “At“

Capacity limitation

The settings which are to made for the capacity limitation are mainly containedin functionblock FB31 as function block parameters. Only after selecting the type of limitation “At“ for outdoor temperature dependent limitation (which automatically means a 4-point characteristic), four outdoor temperature dependent maximum limits for heating need to be set in the 4-point characteristic menu. After selecting “- - -“, set

and

ing

The

Maximum limit for DHW,Minimum limit

Limiting factor

determines how strongly the controller responds when the limitvalues areex-

Maximum limit for the system,Maximum limit for heat-

and the

Limiting factor

that appear in this order.

ceeded in either direction.

Function

Meter bus OFF

Capacity limitation OFF

Parameter* Maximum limit for heating, points 1 to 4 15 kW 0.1 to 6000 kW

WE Configuration

FB29 = ON

254** 1434 Cont

Meter bus address for WMZ 1 to 3 (ST.-NO) / 0 to 255 Model code WMZ 1 to 3 / 1434, CAL3, APAtO, SLS Reading mode WMZ 1 to 3 / 24h, Cont, CoiL

FB31 = ON

15 kW 15 kW 15 kW

1.0

Maximum limit / 0.01 to 6000 kW Maximum limit for heating* / 0.1 to 6000 kW Maximum limit for DHW / 0.1 to 6000 kW Limiting factor / 0.1 to 10.0

* Does not need to be set on selecting “At“ ** WE for WMZ2 and 3: 255

WE Range of values

EB 5476 EN 73

Page 74

Installation

Parameter* * Parameter only needs setting with FB31 = ON, select “At“

WE Range of values

9.5 Memory module

The use of a memory module (accessory no. 1400-7142) is particularly useful to transfer all data fromone TROVIS 5476 Controller to several other TROVIS 5476 Controllers. The memory module is plugged into the RJ-12 jack integrated into the front panel. Once the module has been connected, “76 SP“ is displayed. If the memory module already contains data from a dif ferent TROVIS 5476 Controller, press the enter key until “SP 76" is displayed.

Pressing the enter key to confirm “76 SP“ causes the controller settings to be transferred to

the memory module. Pressing the enter key to confirm “SP 76“ 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.

10 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). To connect the wiring, undo the fastening screw(1) at the front and separatethe controller housing from the back of the controller.

Panel mounting

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

2. Insert the controller housing through the panel cut-out and turn the two plastic clamps (2) on the front panel by 90°.

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

4. Fit the controller housing back on.

Wall mounting

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

2. Fasten the back panel with four screws.

Perform steps 3. and 4. as describe for panel mounting

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.

Perform steps 3. and 4. as describe for panel mounting

74 EB 5476 EN

Page 75

Panel mounting

Installation

Back 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 5476 EN 75

Page 76

Electrical connection

11 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, it must be configured in the configu ration level. Refer to section 2.2 for details. 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 5476 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 (–> page 78 to 80).

Legend for wiring plans:

AF Outdoor temperature sensor SLP Storage tank charging pump RF Room temperature sensor TLP Heat exchanger charging pump VF Flow temperature sensor UP Heating circulation pump SF Storage tank sensor ZP DHW circulation pump RüF Return flow temperature sensor RK Control circuit TWF DHW sensor BE Binary input GND Grounding of input signals WMZ Heat meter connection L + N Mains supply ZB Meter bus interface CF Solar circuit collector sensor CP Solar circuit pump

Connections on the back of the controller, showing pump management as an example

Refer to the instructions of the pump manufacturer for further installation conditions.

EB 5476 EN 77

Page 78

Electrical connection

Systems Anl 1 to 3

System Anl 4

Potentiometer 1 to 2 kΩ

Free

For 0 to 20 mA 50 Ω connected in

Option:

Type 5244 Type 5257-5

Potentiometer 1 to 2 kΩ

Free

For 0 to 20 mA 50 Ω connected in

parallel

78 EB 5476 EN

Option:

Type 5244 Type 5257-5

Page 79

Systems Anl 5 to 7

System Anl 8

Potentiometer 1 to 2 kΩ

Option:

Type 5244 Type 5257-5

Potentiometer 1 to 2 kΩ

Free

For 0 to 20 mA 50 Ω connected in parallel

Free

For 0 to 20 mA 50 Ω connected in parallel

Electrical connection

Option:

Type 5244 Type 5257-5

EB 5476 EN 79

Page 80

Electrical connection

System Anl 9

System Anl 11

Potentiometer 1 to 2 kΩ

Option:

Type 5244 Type 5257-5

Potentiometer 1 to 2 kΩ

Free For 0 to 20 mA

50 Ω connected in parallel

Free For 0 to 20 mA

50 Ω connected in

parallel

80 EB 5476 EN

Option:

Type 5244 Type 5257-5

Page 81

Appendix

12 Appendix

12.1 Function block list

FB Function WE Anl Comments

0 Optimization OFF FB0 = ON: Optimization active; when FB0 = ON also FB13 =

1 Adaptation OFF FB1 = ON: Adaptation active; when FB1 = ON also FB13 = ON 2 Flash adaptation OFF FB2 = ON: Flash adaptation active; when FB2 = ON also

3 Summer mode OFF FB3 = ON: Summer mode active

4 Delayed outdoor

temperature adaptation

5 Automatic summer

time/winter time changeover

6 Public

holidays/vacation data for DHW

7 Thermal

disinfection

8 Priority for DHW

circuit

OFF FB4 = ON: Temperature adaptation active

ON FB5 = ON: Changeover active

OFF 2

OFF 2, 3,

OFF 4, 5,

FB13 = ON

Function block parameters: Start summer mode / 01.01 to 31.12 (01.06) End summer mode / 01.01 to 31.12 (30.09) Outdoor temperature limit/0to30°C(18°C)

Ab: Active when outdoor temperature drops AufAb: Active when outdoor temperature increases or drops

Function block parameter:

Delay / 0.2 to 6 °C/h (3 °C/h)

FB6 = ON: Public holiday and vacation data entered also applies to DHW heating

FB7 = ON: Thermal disinfection active; when FB7 = ON also FB14 =ON

4, 5, 7, 8,

Function block parameter:

9,11

Day of week / 1 to 7 (Mon to Sun), 1–7 (3) FB8 = ON: Priority active

6, 7,

Ab: Priority through set-back operation

In: Priority through reverse control

Function block parameter: Activate priority in case of deviation / 2 to 10 min (10 min)

EB 5476 EN 81

Page 82

Appendix

FB Function WE Anl Comments

9 Parallel pump

operation

10 Control mode

three-step RK1

11 Limit deviation for

OPEN signal RK1

12 Limit deviation for

OPEN signal RK2

13 Room sensor RF OFF All FB13 = ON: Sensor/remote operation activated

14 Storage tank sensor

SF1

15 Storage tank sensor

SF2

OFF 2, 3,9FB9 = ON: Parallel pump operation

Select (Anl 2 and 9): PU: Parallel pump operation US: Operation with switchover valve

Function block parameter (on selecting: US): Stop parallel oper. in case of deviation / 2 to 10 min (10 min)

FB9 = OFF: Intermediate heating after 20 min Select (FB9 = ON, US or FB9 = OFF):

20: Intermediate heating after 20 min – –: No intermediate heating

ON All FB10 = ON: Three-step signal control mode

Function block parameters:

(proportional gain) / 0,1 to 50 (0,5)

(reset time) / 1 to 999 s (200 s)

(valve transit time) / 15, 30, 45 to 240 s (90 s)

Pump lag time/1xT

to 10 x TY(2xTY)

FB10 = OFF: On/off control; when FB10 = OFF also FB11 = OFF Function block parameter:

Hysteresis / 1 to 30 °C (5 °C)

OFF All FB11 = ON, only when FB10 = ON: Limitation active

Function block parameter: Max. deviation / 2 to 10 °C (2 °C)

OFF 4

FB12 = ON, only when FB17 = ON: Limitation active

Function block parameter:

Max. deviation / 2 to 10 °C (2 °C)

Cannot be selected when FB0, FB1 or FB2 = ON; when FB0, FB1 and FB2 = OFF the room temperature is only indicated and not used for the control

ON 2, 3,

FB14 = ON: Sensor SF1 activated

5, 7,

Storage tank thermostat: FB14 = FB15 = OFF

8, 9,

FB15 = ON: Sensor SF2 activated

2, 3,

4, 5,

with 3, 5,

8,11

Select: --: Settings for plants with DHW heating in storage tank

7, 8, 9,11

charging system with 2 storage tank sensors

CF: Activated for solar circuit

Storage tank thermostat: FB14 = FB15 = OFF

82 EB 5476 EN

Page 83

Appendix

FB Function WE Anl Comments

16 Sensor selection OFF All FB16 = ON; select: P1000: Pt 1000 and Pt 100 sensors*

FB16 = OFF: PTC and Pt 100 sensors* * A mixture of both types of sensor is possible

17 Control mode

three-step RK2

ON 4, 5,

FB17 = ON: Three-step signal control mode

6, 7,

Function block parameters:

8, 9,

(proportional gain) / 0.1 to 50 (0,5)

(reset time) / 1 to 999 s (Anl 5, 6: 60 s; Anl 4: 200 s)

(val. transit time) / 15, 30 to 240 s (Anl 5, 6: 30 s; Anl 4: 90 s)

FB17 = OFF: On/off control Function block parameter:

Hysteresis / 1 to 30 °C (5 °C)

18 Outdoor

temperature – current input

OFF All FB18 = ON: Current input to measure outdoor temperature

activated Select: 0: 0 to 20 mA = –20 to 50 °C

4: 4 to 20 mA = –20 to 50 °C A 50-Ωresistor must be connected to terminals 7 (+) and GND (terminals ½) in parallel to the current signal

FB18 = OFF: Sensor input for measuring outdoor temperature

19 4-point

characteristic

20 Return flow sensor

RüF1

OFF FB19 = ON: Characteristic according to four points

FB19 = OFF: Characteristic according to gradient

ON All FB20 = ON: Return flow sensor activated

Function block parameter:

Limiting factor / 0.1 to 10 (1)

Selection with systems Anl 2, 7 and 9:

SLP (thermometer and heat exchanger icons) switched on de pending on return flow temperature or SLP switched on irrele vant of return flow temperature

Setting only possible after entering key number!

21 Return flow sensor

RüF2

OFF 4, 5,11FB21 = ON: Return flow sensor RüF2 activated

Function block parameter:

Limiting factor / 0,1 to 10 (1)

Selection with system Anl 5:

SLP (thermometer and heat exchanger icons) switched on de pending on return flow temperature or SLP switched on irrele vant of return flow temperature

Setting only possible after entering key number!

ntc: NTC and Pt 100 sensors*

EB 5476 EN 83

Page 84

Appendix

FB Function WE Anl Comments

22 Current input for

flow rate measurement

23 Flow rate or

capacity limitation

The following function blocks are in the second level

Potentiometer input

(0)

1 to 2 kΩ

Release for

(1)

control/external demand over BE1

Circulation pump

(2)

(ZP)

Flow sensor VF3 OFF 3, 8,11FB27 = ON: Sensor activated

(3) 28

Pump management

(4)

UP1

OFF All FB22 = ON: Current input active

Select: 0: 0 to 20 mA signal feedforwarding

4: 4 to 20 mA signal feedforwarding A 50-Ωresistor must be connected to terminals 15 (+) and GND (terminals ½) in parallel to the current signal

FB22 = OFF: Pulse input active

Setting only possible after entering key number!

OFF All FB23 = ON and FB22 = OFF: Limitation with pulse input

Function block parameters:

Max. limit value / 3 to 500 pulse/h (500 pulse/h) Limiting factor / 0.1 to 10 (1) Max. limit value for DHW / 3 to 500 pulse/h

Limiting factor / 0,1 to 10 (1) FB23 = ON and FB22 = ON: Limitation with current input

Function block parameters:

Upper measuring range / 0.01 to 650 m Min. limit value / 0.01 to 650 m Max. limit value / 0.01 to 650 m

Setting only possible after entering key number!

OFF FB24 = ON: Potentiometer input connected at terminal 12

FB24 = OFF: Type 5244 or 5257-5 Room Panel connected

OFF 1

FB25= ON: Configuration of BE1 Select: FErn: Release for control

11*

bEd: Demand of a minimum flow temperature

Function block parameter:

Min. flow temperature for external demand / 20 to 130 °C (20 °C) * Not Anl 4, 5 and 9 with solar system or Anl 11 with VF3

OFF 2 to11FB26 = ON: Circulation pump operation acc. to time schedule

FB26 = OFF: ZP operation switches off SLP

OFF All FB28 = ON: BA9 not active outside times-of-use

FB28 = AUS: BA9 active outside times-of-use

(500 pulse/h)

/h (10.00 m3/h)

/h (0.01 m3/h)

/h (9 m3/h)

84 EB 5476 EN

Page 85

FB Function WE Anl Comments

Meter bus OFF All FB29 = ON: Meter bus communication activated

(5)

Function block parameters WMZ 1 to 3:

Meter bus address / 0 to 255 (WMZ1: 254; WMZ2, 3: 255) Model code / 1434, CAL3, APAtO, SLS (1434) Reading mode / 24h, Cont CoiL (Cont)

Setting only possible after entering key number!

Flow rate limitation OFF All FB30 = ON: Flow rate limitation activated

(6)

Select: At: Outdoor temperature dependent limitation,

FB19 = ON when “At“ selected

---: Fixed limitation

Function block parameters:

Max. limit / 0.01 to 650 m

/h (2 m3/h) Max. limit for heating* / 0.01 to 650 m Max. limit for DHW / 0.01 to 650 m Min. limit / 0.01 to 100 m

/h (---) Limiting factor / 0.1 to 10 (1)

* Parameter does not need to be set when “At“ selected

Setting only possible after entering key number!

Capacity limitation OFF All FB31 = ON: Capacity limitation activated

(7)

Select: At: Outdoor temperature dependent limitation,

FB19 = ON when “At“ selected

---: Fixed limitation

Function block parameters:

Max. limit / 0.1 to 6000 kW (15 kW) Max. limit for heating* / 0.1 to 6000 kW (15 kW) Max. limit for DHW / 0.1 to 6000 kW (15 kW) Limiting factor / 0.1 to 10 (1) * Parameter does not need to be set when “At“ selected

Setting only possible after entering key number!

Circulation over

(8)

heat exchanger

OFF 5,11FB32 = ON: Control of DHW circuit remains released after

storage tank charging

Setting only possible after entering key number!

Sensor calibration ON All Cannot be deactivated

(9) 34

Manual level

(10)

locking

Lock dial-up OFF All FB35 = ON: No dial-up in case of fault

OFF All FB34 = ON: Locking activated

(11)

Setting only possible after entering key number!

/h (2 m3/h)

Appendix

EB 5476 EN 85

Page 86

Appendix

FB Function WE Anl Comments

BE8

(12)

(19)

BE1

Modem operation OFF All Select: 8-bit: 8-bit addressing

(20)

Dial-up also upon

(21)

corrected fault

Phone number of

(22)

alternative recipient

Fault alarm output

(23)

BA8

FB Function block, WE Default setting, Anl System code number

All FB36 to 43 = ON: Binary input in error status register

Select: StEIG: Fault indicated by rising edge/make contact

FALL: Fault indicated by negative edge/break contact

16-bit: 16-bit addressing

FB44 = ON: Modem function activated

Function block parameters:

Cyclical initialization In/0to255min(30min) Intervals between dialing PA/0to255 min (5 min) Modem timeout t Dialing procedure/ PULS/ton (PULS)

/ 0 to 99 min (5 min)

Phone number of station GLT / 0 to 9, P, -; max. 23 characters

Setting only possible after entering key number!

OFF All FB45 = ON: Dial-up when faults exist/remedied

FB45 = OFF: Dial up only when faults exist

Setting only possible after entering key number!

OFF All FB46 = ON: Dialing an alternative recipient

Function block parameters:

Number of dialing attempts An / 0 to 99 (5) Phone number of alternative recipient/0to9,P,-;max. 23 char.

Setting only possible after entering key number!

OFF All FB47 = ON and FSr > 0: BA8 = ON

Pump management for UP1 no longer available

Setting only possible after entering key number!

86 EB 5476 EN

Page 87

12.2 Parameter list

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) Gradient, flow

0.2 to 3.2 (1.8)

Level, flow

–30 to 30 °C (0 °C)

4-point characteristic

Press key to set parameters outdoor temperature, points 1 to 4 flow temperature, points 1 to 4 return flow temperature, points 1 to 4 flow rate, points 1 to 4, capacity, points 1 to 4.

4-point characteristic, outdoor temperature

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

–30 to 20 °C ( point 1: –15 °C, point 2: –5 °C, point 3: 5 °C, point 4: 15 °C)

EB 5476 EN 87

Page 88

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) 4-point characteristic, flow temperature

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

20 to 130 °C (point 1: 70 °C, point 2: 55 °C, point 3: 40 °C, point 4: 25 °C)

4-point characteristic, return flow temperature

Return flow temperatures of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4

20 to 90 °C (point 1: 65 °C, point 2: 50 °C, point 3: 35 °C, point 4: 20 °C)

4-point characteristic, capacity

Capacity of the points 2, 3, 4 are marked by squares below the numbers 2, 3, 4

0.1 to 6000 kW (point 1 to 4: 15 kW)

4-point characteristic, flow rate

m3/h

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

0.01 to 100 m (point 1 to 4: 2 m

/h)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

88 EB 5476 EN

4-point characteristic, set-back difference

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

0 to 50 °C (point 2 and 3: 20 °C)

Page 89

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

STOP

Parameter designation

Range of values (default values) Maximum flow temperature

20 to 130 °C (90 °C)

Minimum flow temperature

20 to 130 °C (20 °C)

Set-back difference

0 to 50 °C (15 °C)

OT deactivation value in reduced operation

–10 to 50 °C (15 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Room set point

0 to 40 °C (20 °C)

EB 5476 EN 89

Page 90

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) Reduced room set point

0 to 40 °C (17 °C)

Sustained temperature

0 to 40 °C (15 °C)

Gradient of the heating characteristic, return flow

0.2 to 3.2 (1.2)

Can only be set after entering the key number!

Level, return flow

–30 to 30 °C (0 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

90 EB 5476 EN

Can only be set after entering the key number!

Max. return flow temperature

20 to 90 °C (65 °C)

Can only be set after entering the key number!

Page 91

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

STOP

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) Min. return flow temperature

20 to 90 °C (65 °C)

Can only be set after entering the key number!

OT deactivation value in rated operation

0 to 50 °C (22 °C)

Times-of-use for heating circuit

–> section 1.6

Public holidays

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

–> section 1.6.1

Vacations

–> section 1.6.2

EB 5476 EN 91

Page 92

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values)

System Anl 9, underfloor heating circuit

Gradient, flow

0.2 to 3.2 (0.8)

Level, flow

–30 to 30 °C (–5 °C)

4-point characteristic

Press key to set parameters outdoor temperature, point 1 to 4 flow temperature, point 1 to 4.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

92 EB 5476 EN

4-point characteristic, outdoor temperature

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

–30 to 20 °C ( point 1: –15 °C, point 2: –5 °C, point 3: 5 °C, point 4: 15 °C)

Page 93

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) 4-point characteristic, flow temperature

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

20 to 130 °C (point 1: 50 °C, point 2: 40 °C, point 3: 35 °C, point 4: 20 °C)

4-point characteristic, set-back difference

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

0 to 50 °C (point 2 and 3: 5 °C)

Max. flow temperature

20 to 130 °C (50 °C)

Min. flow temperature

20 to 130 °C (20 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Set-back difference

0 to 50 °C (5 °C)

EB 5476 EN 93

Page 94

Appendix

Display

0112 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Parameter designation

Range of values (default values) Times-of-use for underfloor heating circuit

–> section 1.6

DHW heating

DHW heating ON

20 to 90 °C (45 °C)

With systems Anl 2, 3, 5, 7, 8, 9 and 11 without solar circuit with a storage tank sensor SF1

Hysteresis

0 to 30 °C (5 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

94 EB 5476 EN

DHW heating ON

20 to 90 °C (45 °C)

With systems Anl 2, 3, 5, 7, 8, 9 and 11 with two storage tank sensors SF1 and SF2 or in systems with solar circuit

Page 95

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

STOP

Parameter designation

Range of values (default values) DHW heating OFF

20 to 90 °C (50 °C)

With systems Anl 2, 3, 5, 7, 8, 9 and 11 with two storage tank sensors SF1 and SF2

DHW set point 20 to 90 °C (55 °C)

Anl 4 Anl 6

Charging temperature

20 to 90 °C (55 °C)

End charging process

20 to 90 °C (53 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Return flow limitation temperature during DHW heating

20 to 90 °C (65 °C)

Can only be set after entering the key number!

EB 5476 EN 95

Page 96

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

START

Parameter designation

Range of values (default values) Heat exchanger inlet temperature limit

20 to 130 °C (120 °C)

Time schedule for DHW heating

–> section 1.6

Time schedule for circulation pump

–> section 1.6

Solar circuit pump ON

0 to 30 °C (10 °C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

STOP

96 EB 5476 EN

Solar circuit pump OFF

0 to 30 °C (2 °C)

Page 97

Appendix

Display

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

STOP

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

ST.-NR

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

BAUD

Parameter designation

Range of values (default values) Solar charging OFF

20 to 90 °C (70 °C)

Station address (ST-NO)

1 to 247, 8 bit (255) 1 to 999, 16 bit (255)

Baud rate (BAUD)

150 to 9600 (9600)

EB 5476 EN 97

Page 98

Appendix

12.3 Sensor resistance tables

Resistance values with PTC resistors

Type 5224 Outdoor Temperature Sensors, Type 5264 and Type 5265 Flow and Return Flow Temperature Sensors, Type 5264 Storage Tank Temperature Sensors

°C –20 –10 0 10 20 25 30 40 50 60 70 80 90 100 110 120

694 757 825 896 971 1010 1050 1132 1219 1309 1402 1500 1601 1706 1815 1925

Type 5244 Room Sensor Switch position , terminals 1 and 2

Resistance values with Pt 100 resistors

Suitable Pt 100 sensors include

Outdoor temperature sensor: Type 5225

Flow and return flow temperature sensors: Type 5204, Type 5205-47

Storage tank temperature sensor: Type 5205

Room temperature sensor: Type 5255

–35 –30 –25 –20 –15 –10 –5 0 5 10

°C

86.25 88.22 90.19 92.16 94.12 96.09 98.04 100.00 101.95 103.90

15 20 25 30 35 40 45 50 55 60

°C

105.85 107.79 109.73 111.67 113.61 115.54 117.74 119.40 121.32 123.24

°C 10 15 20 25 30

679 699 720 741 762

65 70 75 80 85 90 95 100 105 110

°C

125.16 127.07 128.98 130.89 132.80 134.70 136.6. 138.50 140.39 142.29

115 120 125 130 135 140 145 150

°C

144.17 146.06 147.94 149.82 151.70 153.58 155.45 157.31

Resistance values with Pt 1000 resistors

Use the resistance values listed in the table for Pt 100 resistors and multiply them by 10. Suitable Pt 1000 sensors include:

Outdoor temperature sensor: Type 5227-2

Flow and return flow temperature sensors: Types 5207, 5277-2 (thermowell required) and

5267-2 Storage tank temperature sensor: Types 5207, 5277-2 (thermowell required)

Room temperature sensor: Type 5257-1, room temperature sensor with remote control:

Type 5257-5

98 EB 5476 EN

Page 99

12.4 Technical data

Appendix

Inputs

Sensor inputs

Binary inputs BE1 optionally for releasing a control circuit or external demand

Other inputs Pulse or current input for capacity or flow rate limitation

Outputs

Control signal outputs

Binary outputs Max. 4 outputs to control pumps,

Interfaces Serial RS-485 interface for connection to four-wire bus, protocol: Modbus

Operating voltage 230 V AC (+ 10 %/–15 %), 48 to 62 Hz

Power consumption Approx. 3 VA Temperature range Operation: 0 to 40 °C (avoid long periods of heat) Storage: –20 to 60 °C Degree and class of

protection Degree of contamination 2 according to VDE 0110 Overvoltage category II according to VDE 0110 Humidity rating F according to VDE 40040 Noise immunity According to EN 61000-6-1 Noise emission According to EN 61000-6-3 Weight Approx. 0.6 kg

7 configurable inputs for sensors (Pt 100 and PTC or Pt 100 and Pt 1000 or Pt 100 and NTC) or binary alarms

1 outdoor temperature input for sensor or current signal 4 (0) to 20 mA 1 flow temperature sensor input

BE5 configurable for storage tank thermostat

Remote control to correct the room temperature and select the operating mode Alternatively, potentiometer input 1 to 2 kΩor configurable for binary alarm

Three-step signals: Load 250 V AC, max. 2 A, min. 10 mA On-off signals: Load 250 V AC, max. 2 A, min. 10 mA Varistor suppression 300 V

load 250 V AC, max. 2 A, min. 10 mA, varistor suppression 300 V 2 reed relay outputs for controlling the speed of a circulation pump or for

fault indication, load max. 24 V, 100 mA

RTU, data format 8N1or serial RS-232-C interface for connection to a modem; connection over RJ-12 jack Option: Meter bus interface

Power supply failure: All parameter settings and configuration data are stored in an EEPROM in the case of power failure

IP 40 according to IEC 529 and II according to VDE 0106

EB 5476 EN 99

Page 100

Appendix

12.5 Customer data

Station Operator Relevant SAMSON office System code number

Function block settings

01234567891011

12 13 14 15 16 17 18 19 20 21 22 23

24 25 26 27 28 29 30 31 32 33 34 35

36 37 38 39 40 41 42 43 44 45 46 47

Function block parameter settings

Function block parameters Range of values

Start summer mode (FB3 = ON) Freely configurable End summer mode (FB3 = ON) Freely configurable Outdoor temperature limit (FB3 = ON) 0 to 30 °C Delay (FB4 = ON) 0.2 to 6 °C/h Day of week (FB7 = ON) 1 to 7, 1–7 Priority in case of deviation (FB8 = ON) 2 to 10 min Stop parallel operation in case of deviation (FB9 = ON) 2 to 10 min Proportional gain KP(FB10 = ON) 0.1 to 50 Reset time T Valve transit time TY(FB10 = ON) 15 to 240 s

(FB10 = ON) 1 to 999 s

100 EB 5476 EN

Samson 5476 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents