Honeywell R0808, EN2H-0221GE51 R0808 User Manual

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Smile SDC heating and

district heating controller

SERVICE MANUAL

EN2H-0221GE51 R0808

SDC / DHC Contents

Contents

1 Software version ..........................................................................................................11

2 Safety instructions.......................................................................................................11

2.1 Intended use .....................................................................................................11

2.2 Requirements for start-up..................................................................................11

2.2.1 Power supply ........................................................................................12

2.2.2 Connection conditions ..........................................................................12

2.2.3 Cable cross-sections ............................................................................12

2.2.4 Maximum cable lengths........................................................................12

2.2.5 Cable installation ..................................................................................12

2.2.6 Grounding and zeroing .........................................................................13

2.3 Hot-water temperature greater than 60 °C ........................................................13

2.4 Connection of accessory parts ..........................................................................14

2.5 Maintenance and cleaning ................................................................................14

2.6 Safety precautions for EMC-compliant installation ............................................15

3 Overview.......................................................................................................................20

4 Abbreviations ...............................................................................................................21

5 Operation......................................................................................................................22

5.1 Display and operating elements ........................................................................22

5.1.1 Display (basic display)..........................................................................23

5.1.2 Operating elements ..............................................................................24

5.1.2.1 Input button (press / turn)........................................................24

5.1.2.2 "Daytime room temperature" button ........................................24

5.1.2.3 "Night-time room temperature" button.....................................25

5.1.2.4 "Daytime hot-water temperature" button .................................25

5.1.2.5 "Operating mode" button (basic display) .................................26

5.1.2.6 "Switching time programs / Holiday programs" button ............33

5.1.2.7 "System information" button....................................................35

5.1.2.8 "Manual mode" / "Emission measurement" button ..................44

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Contents SDC / DHC

5.1.2.9 Access to the technician / OEM area ......................................46

5.1.2.10 Heating curve..........................................................................47

5.2 Menu-selection level..........................................................................................48

5.2.1 "Time - Date" menu ..............................................................................54

5.2.2 "Timeprograms" menu ..........................................................................55

5.2.2.1 Selection of the control circuit .................................................56

5.2.2.2 Selection of the program .........................................................56

5.2.2.3 Selection of day of the week and cycle ...................................56

5.2.2.4 Programming switching times and cycle temperatures ...........57

5.2.3 "System Parameters" menu..................................................................72

5.2.3.1 Language selection .................................................................72

5.2.3.2 Time program..........................................................................73

5.2.3.3 Operating mode ......................................................................74

5.2.3.4 Parameter reset ......................................................................76

5.2.3.5 Complete reset........................................................................77

5.2.4 "DHW" menu ........................................................................................77

5.2.4.1 Night-time hot-water temperature............................................78

5.2.4.2 Legionella protection day ........................................................78

5.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed

Heating Circuit 2" menu........................................................................78

5.2.5.1 Reduced operation..................................................................79

5.2.5.2 Heating system .......................................................................80

5.3 Error messages.................................................................................................80

5.4 Parameter settings ............................................................................................81

5.4.1 "Hydraulics" menu (HYDRAULIC) ........................................................81

5.4.2 "System parameters" menu (SYSTEM)................................................85

5.4.3 "Hot-water circuit" menu (DHW) ...........................................................89

5.4.4 "Direct heating circuit" menu (UNMIXED CIRC) ...................................92

5.4.5 "Mixed heating circuit 1 / 2" (MIX.VALVE - 1 / MIX.VALVE - 2)

menus ...................................................................................................95

5.4.6 "Heat generator" menu (HEAT GENER................................................99

4 EN2H-0221GE51 R0808

SDC / DHC Contents

5.4.7 "District hot water" menu (DIST.HEATING) ........................................104

5.4.8 "Return increase" menu (RETURN CONTR)......................................105

5.4.9 "Solar" menu (SOLAR) .......................................................................106

5.4.10 "Solid" menu (SOLID FUEL) ...............................................................107

5.4.11 "Buffer" menu (BUFFER)....................................................................108

5.4.12 "Total flow regulation" menu (MAIN SUPPLY)....................................109

5.4.13 "Cascading" menu (CASCADE) .........................................................110

5.4.14 "Data bus" menu (BUS) ......................................................................111

5.4.15 "Relay test" menu (RELAY TEST ) ....................................................111

5.4.16 "Error messages" menu (ALARM) ......................................................112

5.4.17 "Error messages 2" menu (ALARM 2) ................................................113

5.4.18 "Sensor calibration" menu (SENSOR ADJ.) .......................................113

6 Control Functions ......................................................................................................114

6.1 Variable adjustment of the hydraulic parameters (variable inputs and

outputs) ...........................................................................................................114

6.1.1 Connection and settings table ............................................................116

6.2 Switching time program enabling ....................................................................117

6.3 Suppressing the cycle temperature on time program level..............................118

6.4 Enabling "Separate Control Mode"..................................................................118

6.5 Switching from SDC to DHC ...........................................................................119

6.6 Selection of hydraulic parameter presettings ..................................................119

6.7 The variable inputs and outputs of device series SDC/DHC 43 ......................119

6.8 General functions and their operation .............................................................120

6.8.1 Outside temperature sensing..............................................................120

6.8.1.1 Building type .........................................................................120

6.8.2 Heating circuit outside temperature assignment.................................121

6.8.3 Outside temperature emergency operation value...............................121

6.8.4 Outside temperature disable...............................................................122

6.8.5 Climate zone.......................................................................................122

6.8.6 Design temperature ............................................................................122

6.8.7 Summer switch-off..............................................................................123

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Contents SDC / DHC

6.8.8 System frost protection.......................................................................124

6.8.9 Pump forced operation .......................................................................127

7 Hydraulic Components..............................................................................................128

7.1 Heat generator: Boiler .....................................................................................128

7.1.1 Heat generator start-up protection......................................................128

7.1.2 Heat generator minimum temperature limit.........................................129

7.1.3 Maximum temperature limit heat generator ........................................130

7.1.4 Heating circuits minimum temperature limit ........................................130

7.1.5 Heat generator sensor control mode ..................................................130

7.1.6 Minimum burner runtime.....................................................................131

7.1.7 Switching: Multi-stage heat generator/Switching differential...............131

7.1.8 Operation for modulating burners .......................................................136

7.1.9 Modulation of P part (Xp)....................................................................137

7.1.10 Modulation of sample time Ta.............................................................137

7.1.11 Modulation of integral action time Tn ..................................................138

7.1.12 Modulation of runtime .........................................................................138

7.1.13 Modulation of start time ......................................................................138

7.1.14 Modulation of start power ...................................................................139

7.1.15 OpenTherm ........................................................................................140

7.1.16 Use of boiler sensor 2.........................................................................141

7.1.17 External heat generator cut-off ...........................................................141

7.1.18 Heat generator forced discharge ........................................................141

7.1.19 Exhaust gas temperature monitoring ..................................................142

7.1.20 Burner counter mode ..........................................................................143

7.2 Heat generation, heat exchanger, district heating ...........................................144

7.2.1 On/Off operation of the district heating valve......................................145

7.2.2 Continuous heat exchanger valve control...........................................145

7.2.3 District heating return temperature limit..............................................147

7.2.4 Return temperature limit for hot-water loading....................................149

7.2.5 Hot-water pre-regulator with district heating systems .........................150

7.2.6 Mode of operation: Hot-water pre-control ...........................................151

6 EN2H-0221GE51 R0808

SDC / DHC Contents

7.2.7 Quick hot-water control.......................................................................152

7.2.8 Mode of operation of hot-water control mode "external

operation" ...........................................................................................154

7.2.9 Conditional parallel operation for mixed heating circuits.....................155

7.2.10 Circulation pump control mode ...........................................................155

7.2.11 Switch-off of district heating control ....................................................156

7.2.12 Return interval flushing .......................................................................156

7.2.13 Heat meter for additional limitation according to the volume flow

or thermal output ................................................................................156

7.2.14 Charging pump (CHP) ........................................................................157

7.2.15 Primary pump .....................................................................................158

7.2.16 Boiler circuit pump ..............................................................................158

7.2.17 Return increase ..................................................................................159

7.2.17.1 Bypass pump (RBP)..............................................................160

7.2.17.2 Return maintenance through controlled feed water addition 160

7.2.17.3 Indirect return increase .........................................................161

7.3 Heating circuit .................................................................................................161

7.3.1 General heating circuit functions ........................................................161

7.3.1.1 Heating curve........................................................................161

7.3.1.2

7.3.1.3 Reduced operation................................................................164

7.3.1.4 Heating system .....................................................................164

7.3.1.5 Heating circuit temperature limit............................................164

7.3.1.6 Heating circuit temperature offset .........................................165

7.3.1.7 Heating circuit pump extended running time .........................165

Heating curve setting (heating curve)....................................162

7.3.1.8 Screed function .....................................................................165

7.3.2 Heating circuit constant temperature control ......................................168

7.3.3 Fixed-value control .............................................................................168

7.3.4 Consideration of the room temperature/room influence......................169

7.3.4.1 Heating circuit room connection............................................169

7.3.4.2 Heating circuit room factor ....................................................170

EN2H-0221GE51 R0808 7

Contents SDC / DHC

7.3.4.3 Heating circuit room controller ..............................................171

7.3.4.4 Switch-on/switch-off optimisation ..........................................171

7.3.4.5 Room setpoint ramp..............................................................175

7.3.4.6 Heating limit function.............................................................175

7.3.4.7 Heating circuit room frost protection limit ..............................177

7.3.4.8 Mixed heating circuits cooling switch-over ............................177

7.3.4.9 Heating circuit name .............................................................180

7.3.4.10 Room thermostat function (maximum room

temperature limit) ..................................................................181

7.3.5 Hot-water production ..........................................................................187

7.3.5.1 Hot-water tank loading (SLP) ................................................187

7.3.5.2 Circulation pump (CIR.).........................................................194

7.3.6 Solar/Solid fuel/Buffer.........................................................................196

7.3.6.1 Solar function ........................................................................196

7.3.6.2 Buffer tank function ...............................................................199

7.3.6.3 Solid fuel function..................................................................212

7.3.7 Tank loading switch-over....................................................................213

7.3.8 Hydraulic buffer relief (HBR)...............................................................215

Easy enabling and disabling of a heating pump .................................216

7.3.9

7.3.10 Other system components..................................................................217

7.3.10.1 Global fault message input....................................................217

7.3.10.2 Global fault message output .................................................217

7.3.10.3 Timer 217

7.3.10.4 External switching modem ....................................................218

7.3.10.5 External information ..............................................................219

7.3.10.6 Demand contact....................................................................219

7.3.11 Bus communication ............................................................................221

7.3.11.1 Bus address of central device ...............................................221

7.3.11.2 Control functions via the data bus.........................................222

7.3.11.3 Operation of wall devices ......................................................227

7.3.12 Cascading of heat generators in the bus system................................232

8 EN2H-0221GE51 R0808

SDC / DHC Contents

7.3.12.1 General description of cascading of control devices .............232

7.3.12.2 Function of the cascade parameters.....................................233

7.3.12.3 Mode of operation of cascade control ...................................234

7.3.13 Commissioning, maintenance and troubleshooting help ....................237

7.3.13.1 Automatic set function...........................................................237

7.3.13.2 Emission measurement (not for DHC 43) .............................238

7.3.13.3 Relay/function test.................................................................239

7.4 Error messages...............................................................................................243

7.4.1 Basic display/fault stack fault messages ............................................248

7.4.1.1 Sensor calibration .................................................................249

7.4.1.2 Full controller reset................................................................249

7.4.1.3 Controller time correction ......................................................249

8 Technical data............................................................................................................250

8.1 General ...........................................................................................................250

8.1.1 Installation recommendations .............................................................251

8.2 Sensor resistance values ................................................................................251

8.2.1 NTC 20 ...............................................................................................251

8.2.2 PT 1000 ..............................................................................................252

8.3 Sensor measurement ranges ..........................................................................252

8.4 Digital inputs....................................................................................................253

9 Log ..............................................................................................................................254

Index....................................................................................................................................255

EN2H-0221GE51 R0808 9

Contents SDC / DHC

10 EN2H-0221GE51 R0808

SDC / DHC Software version

1 Software version

This documentation is valid for software version V 3.0 of your control device. The software version is displayed after switch-on for approx. 8 s. If you are using an older software version, please contact your heating technician.

2 Safety instructions

2.1 Intended use

The SDC / DHC Smile family of controllers was designed for the sole purpose of regulating and controlling hot-water, heating and district heating systems (including hot-water production) that do not exceed a maximum flow temperature of 120 °C.

2.2 Requirements for start-up

ATTENTION

The heating system must be complete and filled with water so that the pumps do not run dry and the heating boiler is not damaged.

The control equipment must be installed in accordance with the installation instructions.

All electrical connections (voltage supply, burner, mixer motor, pumps, sensor wiring etc.) must be carried out by the technician in accordance with the applicable VDE regulations and correspond with the circuit diagrams.

If floor heating is connected, a limiting thermostat must also be installed in the flow line after the heating circuit pump. This switches off the pumps at excessive flow temperatures.

Before starting up the controller, have the heating technician check all requirements listed above.

NOTE

The current time and date are already set at the factory and are backed up by a battery.

The time switch functions based on a basic program and the control functions are preset for common heating systems with lowtemperature boilers.

EN2H-0221GE51 R0808 11

Safety instructions SDC / DHC

2.2.1 Power supply

Do not disconnect the controller from the mains supply!

The battery for saving all individualised data is otherwise unnecessarily strained. The frost-protection function of the controller is deactivated.

2.2.2 Connection conditions

All electrical connection work may only be carried out by qualified personnel!

2.2.3 Cable cross-sections

1.5 mm2 for all cables carrying 230 V (power supply, burner,

pumps, actuator).

0.6 mm2 for bus cables (recommended type J-Y(St)Y 2 x 0.6).

0.5 mm2 for sensors, selectors and analog signal cables.

2.2.4 Maximum cable lengths

Sensor, selector and analog inputs

We recommend using cables no longer than 200 m. Longer connection lines could be used, but increase the risk of interference.

Relay outputs

Unlimited cable length.

Bus connections

Max. length of 100 m from the first bus subscriber to the last one (incl. wall modules).

2.2.5 Cable installation

Install cables for sensors apart from the cables carrying 230 V! Branch boxes in the sensor cable must be avoided!

12 EN2H-0221GE51 R0808

SDC / DHC Safety instructions

2.2.6 Grounding and zeroing

Local regulations on the connection of equipment must be observed!

2.3 Hot-water temperature greater than 60 °C

ATTENTION

Note that there is a danger of scalding at all hot-water drawoff points (kitchen, bathroom etc.) in the following cases. Add sufficient cold water in these cases.

Automatic anti-

legionella mechanism

When the automatic anti-legionella mechanism is activated, the hot water is automatically heated to the anti-legionella temperature (65 °C at the factory) on the selected day and at the selected time to kill any legionella bacteria found in the hot-water tank.

Manual mode /

Emission

measurement

In the manual mode / emission measurement operating mode, the hot water is heated up to the highest possible boiler temperature, as the burner and all pumps are switched on and the mixer is opened fully. There is an acute danger of scalding at all connected hot-water draw-off points! Add sufficient cold water or switch off the hot-water loading pump (at the switch of the pump, if present). Heating and hot water are in unregulated continuous operation. This operating mode is for special use by the chimney sweep for emission measurement or if the controller is defective. The high hot-water temperatures can be prevented, however, by setting the boiler thermostat to a max. boiler temperature of approx. 60 °C.

EN2H-0221GE51 R0808 13

Safety instructions SDC / DHC

2.4 Connection of accessory parts

WARNING

According to VDE 0730, a separator for each mains terminal is to be provided in the voltage supply to the control equipment. Observe the local regulations regarding grounding and zeroing.

As soon as the mains voltage is applied to terminals 21, 22, 2, 6, 12 and 18, headers X3 and X4 can also carry mains voltage.

If the heating circuit and hot-water loading pumps do not have an On / Off switch, but manual switch-on and switch-off capability is still desired, the appropriate switches must be installed by the customer. All accessory parts (sensors, selectors etc.) are to be connected to the respective circuit diagram.

2.5 Maintenance and cleaning

The controller is maintenance-free. The device can be cleaned externally with a moist (not wet) cloth.

14 EN2H-0221GE51 R0808

SDC / DHC Safety instructions

2.6 Safety precautions for EMC-compliant installation

Mains lines and sensor/data bus lines must be installed separate from each other. A minimum of 2 cm space must be present between the lines. It is permissible to cross lines.

a Mains 230 V AC x 15 cm

b Data bus line 12 V AC y 2 cm

For control devices with their own mains connection, separate installation of mains and sensor/bus lines must absolutely be ensured. If cable ducts are used, they are to be provided with cutoff bridges.

EN2H-0221GE51 R0808 15

Safety instructions SDC / DHC

When installing control or wall devices, a minimum spacing of 40 cm to other electrical equipment with electromagnetic emissions, e.g. relays, motors, transformers, dimmers, microwave ovens and televisions, audio speakers, computers, cordless telephones etc., is to be ensured.

x 40 cm

A minimum spacing of 40 cm is to be ensured between wall devices and central devices. Multiple central devices in the data bus system can be mounted directly next to one another.

16 EN2H-0221GE51 R0808

SDC / DHC Safety instructions

The mains connection of the heating system (boiler – panel – control equipment) must be designed as a separate circuit. Neither fluorescent lamps nor any machines which are potential sources of interference may be connected/connectable.

a Safety fuse 16 A

b Boiler room emergency switch

c Connect boiler room lighting and electrical outlets to

separate circuits only!

d Wall devices

e Heat generator

Shielded cables must be used for the data bus lines.

For a recommended layout, see 8 Technical data, pg. 250

EN2H-0221GE51 R0808 17

Safety instructions SDC / DHC

The earth connection of the cable shielding must occur on one side at the protective conductor connection, e.g. at the cladding plate of the heat generator, protective conductor terminal etc. Multiple earth connections of a single cable are not permissible (buzzing loop).

a No earth connection here! b Central device

18 EN2H-0221GE51 R0808

SDC / DHC Safety instructions

With star-topology data bus systems, double earth connections may not be made. The earth connection must be made on one side of the star!

a Shielding b Two-lead data bus line

c Distributor terminal d Branch box

The outside sensor may not be installed near transmitters or receivers (e.g. on garage walls near garage door opener receivers, amateur radio antennas, radio alarm systems or directly next to large transmission equipment etc.).

EN2H-0221GE51 R0808 19

Overview SDC / DHC

3 Overview

The modular SDC / DHC control device is available in an installable switch cabinet version and a surface-mounted wall version with the following equipment features:

Type

SDC 3-10

SDC 3-40

SDC 7-21 1)

SDC 9-21 2)

SDC 12-31 3)

Number of output relays

Burner stage 2

District heating valve

CLOSED

Burner stage 1

Direct heating circuit

Variable output 3

Mixed heating circuit 1

Mixed heating circuit 2

Tank loading pump

Variable output 2

3 – x x – – x –

3 – – – x – – – –

7 – x x x – x – –

x x x x – x x x + two variable relays

x x x x x x x x + two variable relays

DHC 43-1

DHC 43-2

DHC 43-3

Variable output 1

20 EN2H-0221GE51 R0808

SDC / DHC Abbreviations

4 Abbreviations

The following abbreviations are used in this documentation/in the display of the control device:

RED

OS2

FGS

BUS

OC1

OC2

DCP

ECO

EHR

SFB

SFR

Lowering operation

Outside sensor

Outside sensor 2

Flue gas sensor

Outside temperature

System data bus

Burner stage 1 operating hour counter

Burner stage 2 operating hour counter

Direct heating circuit

Direct heating circuit pump

Switch-off operation

Electric heating rod

Solid fuel boiler sensor

Solid fuel buffer sensor

Fixed-value control

BS 2

BLP

RBP

SD I

SD II

TLP

SLS

SLSS

SFD

SLP

STL

VO1

Buffer sensor 2 (bottom)

Buffer loading pump

Return bypass pump

Return pump

Switching differential I

Switching differential II

Tank sensor

Tank loading pump

Solar loading switch-over

Solar loading switch-over sensor

Solar forced dissipation

Solar loading pump

Stratified tank loading pump

Variable output (general)

Variable output 1

SFP

CRS

CTBS

CFS

MHP

Solid fuel pump

Pulse input

Boiler circuit pump

Constant control

Collector return sensor

Collector tank/buffer sensor

Collector flow sensor

Mixer motor

Mixed heating circuit

Mixed heating circuit pump

Switching time program

Buffer sensor (top)

VO2

VI1

VI2

VI3

FM1

FM2

PHE

HGS

CIR

CHP

Variable output 2

Variable input (general)

Variable input 1

Variable input 2

Variable input 3

Flow sensor of mixed heating circuit 1

Flow sensor of mixed heating circuit 2

Parallel heat generator enable

Heat generator

Heat generator sensor

Wall device for room temperature sensing

Hot water

Circulation pump

Charging pump

EN2H-0221GE51 R0808 21

Operation SDC / DHC

5 Operation

5.1 Display and operating elements

1011

1 "Manual mode" / "Emission measurement" button (not on

district heating controllers)

2 "Operating modes" button (basic display)

3 "Switching time programs" / "Holiday programs" button

4 "System information" button

5 Display

6 Cover clip for service socket

7 "Daytime room temperature" button

8 "Night-time room temperature" button

9 "Daytime hot-water temperature" button

10 Input button (press / turn)

11 Operating mode symbols (heating programs)

22 EN2H-0221GE51 R0808

SDC / DHC Operation

5.1.1 Display (basic display)

3 4

1 Day of the week / Date 4 Operating mode symbols

2 Time 5 Heat generator temperature

3 Active operating mode

The illumination of the display is switched on by pressing any button or using the input button î and switches off automatically

if no buttons are pressed for a longer period of time.

During start-up of the unit and after a power failure, a segment test with automatic fault diagnosis is carried out. The respective device type and the software version number then appear briefly.

The basic display that then appears shows the day of the week, the date, the time and the heat generator temperature in automatic mode. Different values appear in the basic display depending on the set operating mode (AUTOMATIC, PARTY etc.). Thus, for example, in the ABSENT operating mode, the indication ABSENT TIL appears instead of the date and the return date instead of the temperature. Active summer deactivation is

indicated by a beach umbrella symbol

protection is indicated by a snowflake symbol

À, and active frost

Á.

EN2H-0221GE51 R0808 23

Operation SDC / DHC

5.1.2 Operating elements

5.1.2.1 Input button (press / turn)

By pressing once, you can:

• Confirm input / values

By pressing and holding (approx. 3 s), you can:

• Switch to the menu-selection level

• Move up one menu level

By turning the input button î, you can:

• Change values (clockwise increases called-up values, anticlockwise decreases them)

• Navigate through menus

5.1.2.2 "Daytime room temperature" button

Sets the desired room temperature (room setpoint) in automatic

mode during the heating cycles and in the PARTY and HEATING

operating modes. In operating mode 1, the set value for all heating circuits is the same. In operating mode 2, the set value applies for the respective heating circuit. To set the operating mode, see 5.2.3.3 Operating mode, pg. 74.

Setting

► Press ¥ button.

► Set flashing room temperature specification to the desired

value by turning the input button î.

► Confirm set value by pressing the

button î.

¥ button or the input

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

Factory setting

Setting range

20 °C

5 ... 30 °C

24 EN2H-0221GE51 R0808

SDC / DHC Operation

5.1.2.3 "Night-time room temperature" button

Sets the lowered room temperature in automatic mode between

the heating cycles and in the ABSENT and RED. HEATING

operating modes.

In operating mode 1, the set value for all heating circuits is the same. In operating mode 2, the set value applies for the respective heating circuit. To set the operating mode, see

5.2.3.3 Operating mode, pg. 74.

Setting

► Press ¦ button.

► Set flashing room temperature specification to the desired

Factory setting

Setting range

5.1.2.4 "Daytime hot-water temperature" button

Setting

value by turning the input button

î.

► Confirm set value by pressing the ¦ button or the input

button î.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

16 °C

5 ... 30 °C

Sets the daytime hot-water temperature during the hot-water operational-readiness times in automatic mode and in the PARTY and HEATING operating modes. This set value also applies for exclusively hot-water operation (manual summer operation).

► Press § button.

► Set flashing hot-water temperature to the desired value by

turning the input button î.

► Confirm set value by pressing the § button or the input

button î.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

Factory setting

50 °C

EN2H-0221GE51 R0808 25

Operation SDC / DHC

Setting range

One-time hot-water

circuit loading

5.1.2.5 "Operating mode" button (basic display)

5 °C (hot-water economy temperature) ... Maximum hot-water heater temperature limit (service setting)

Pressing and holding (approx. 3 s) the § button brings you to the reload function, where the reload time can be set in minutes. With a reload time of 0 minutes, loading is started once and the hot-water tank is loaded to the daytime setpoint. The time for this superimposed hot-water circuit loading can be set between 0 and 240 minutes. The current week program is superimposed here.

Sets the operating mode and returns to the basic display from every operating level.

26 EN2H-0221GE51 R0808

SDC / DHC Operation

Overview of the operating modes

Symbol Operating mode Display Setting

ABSENT

PARTY

AUTOMATIC

SUMMER

P1 (P2, P3)*, return date

P1 (P2, P3)*, party end time

P1 (P2, P3)*

P1(P2, P3)*

HEATING

RED. HEATING

STANDBY

* P2 and P3 only after enabling, see "System Parameters"

menu, parameter 2 = P1 to P3

EN2H-0221GE51 R0808 27

Operation SDC / DHC

The selected operating mode appears in plain text, whereby a marking at the bottom edge of the display points to the respective operating mode symbol at the same time. In operating mode 1, the set value for all heating circuits is the same. In operating mode 2, the set value applies for the respective heating circuit. To set the operating mode, see 5.2.3.3 Operating mode, pg. 74.

Setting

► Press button.

► Select operating mode by turning the input button î. The

marking is located above the corresponding operating mode symbol.

► Confirm set operating mode by pressing the button or the

input button î.

► With short-term operating modes (ABSENT, PARTY), set the

Return to the basic

display

NOTE

5.1.2.5.1 Absence mode (short-term program)

desired value by turning the input button î and confirm with the button or the input button î.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

Press the button for approx. 3 s to return to the basic display from any operating level.

Holiday mode is set via the "Switching time programs / Holiday programs" button (see 5.1.2.6 "Switching time programs / Holiday programs" button, pg. 33).

With the ABSENT operating mode, heating operation is temporarily deactivated and protected from frost during brief absences. During the absence, all heating circuits are adjusted to the specified lowered room temperature. Once the set time expires, the heating circuits automatically return to the operating mode that was active before the switch to the absence operation. Short-term programs such as PARTY or ABSENT are skipped here.

Setting

Application

See 5.1.2.5 "Operating mode" button (basic display) , pg. 26

Short absence while heating operation is active.

28 EN2H-0221GE51 R0808

SDC / DHC Operation

Cancellation

Factory setting

Setting range

An active absence program can be cancelled in case of early return.

► Press button.

► Turn input button î and switch to automatic operation.

The active absence program has been cancelled.

P1 as from activation

P1 (P2, P3) / 0.5 to 24 h to the current time

P1 (P2, P3)

Program-controlled resumption of heating operation. After activation of the absence program, heating operation is interrupted until the following switch-on time of the current automatic program P1 (or P2 or P3, if enabled).

0,5 ... 24 h

The set value is added on to the current time and represents the return time. When the absence program is called up again, the last set value is saved and suggested as the initial value.

Display

An active absence program appears in the basic display with information on the return time.

5.1.2.5.2 Party mode (short-term program)

Party mode causes one-time intermediate heating of all heating circuits up to a specified point in time and bridges an upcoming or already active absence cycle totally or partially. Once the set time expires, the heating circuits automatically return to the operating mode that was active before the party program. Short-term

programs such as ABSENT or PARTY are skipped here.

Setting

Application

See 5.1.2.5 "Operating mode" button (basic display) , pg. 26

One-time extension of heating operation or intermediate heating during lowering operation outside the schedule.

EN2H-0221GE51 R0808 29

Operation SDC / DHC

Cancellation

Factory setting

Setting range

Display

An active party program can be cancelled early.

► Press button.

► Turn input button î and switch to automatic mode.

The active party program has been cancelled.

P1 as from activation

P1 (P2, P3) / 0.5 to 24 h to the current time P1

P1 (P2, P3)

Program-controlled resumption of heating operation. After activation of the party program, heating operation is continued until the following switch-on time of the current automatic program P1 (or P2 or P3, if enabled)

0,5 ... 24 h

The set value is added on to the current time and represents the end of the party time. When the party program is called up again, the last set value is saved and suggested as the initial value.

An active party program appears in the basic display with information on the party end time.

5.1.2.5.3 Automatic mode

In automatic operation, max. three time programs with different heating operation times are available. They are called up during

start-up as factory-set and unlosable default programs P1, P2 or P3 and can, if necessary, be overwritten with their own switching times in the "Timeprograms" menu (see 5.2.2 "Timeprograms" menu, pg. 55).

NOTE

Default programs P2 and P3 cannot be selected until the PROGRAM = P1 to P3 parameter is enabled in the "System Parameters" menu. Without enabling, only program P1 is active.

Setting

See 5.1.2.5 "Operating mode" button (basic display) , pg. 26

30 EN2H-0221GE51 R0808

SDC / DHC Operation

Disabling / enabling default program P2 to P3

Disabling

"System Parameters" menu, program parameter = P1. All heating circuits and the hot-water circuit solely refer to the default /

individually programmed switching times in the program P1 parameter. Program P1 does not appear in the display in this operating mode (see 5.2.2 "Timeprograms" menu, pg. 55 and

5.2.3.2 Time program, pg. 73).

Enabling

"System Parameters" menu, program parameter = P1 to P3 (see

5.2.2 "Timeprograms" menu, pg. 55 and 5.2.3.2 Time program,

pg. 73).

Display

An active automatic program appears in the basic display with the current date and time. If default programs P2 and P3 were

enabled, the corresponding symbol, Â,Ã or Ä, is also displayed depending on the selected program. The symbols are only displayed with the time program P1 to P3 active.

5.1.2.5.4 Manual summer operation (excluding heating operation)

With manual summer operation, only the hot-water circuit remains operation and controls the heat generator temperature based on

the specified hot-water temperature and the specified hot-water switching time program. Heating operation is stopped, and protection from frost is provided. This feature is only available when control mode is set to 1.

Setting

See 5.1.2.5 "Operating mode" button (basic display) , pg. 26

Disabling / enabling default programs P2 to P3

Disabling

"System Parameters" menu, program parameter = P1. All heating circuits and the hot-water circuit solely refer to the default /

individually programmed switching times in the time program = P1 parameter. Program P1 does not appear in the display in this operating mode (see 5.2.2.1 Selection of the control circuit, pg. 56 and 5.2.3.2 Time program, pg. 73).

EN2H-0221GE51 R0808 31

Operation SDC / DHC

Enabling

"System Parameters" menu, program parameter = P1 to P3 (see

5.2.2.1 Selection of the control circuit, pg. 56 and 5.2.3.2 Time

program, pg. 73).

Display

Manual summer operation appears in the basic display with the information SUMMER. If default programs P2 and P3 were

enabled, the corresponding symbol, Â, Ã or Ä, is also displayed depending on the selected program. The symbols are only displayed with the time program P1 to P3 active.

5.1.2.5.5 Continuous heating operation

The HEATING operating mode ensures continuous heating operation without time limitations based on the specified daytime

room temperature. Hot-water production occurs continuously based on the specified daytime hot-water temperature.

NOTE

The HEATING operating mode remains active until another

operating mode is activated.

Display

Activated continuous heating operation appears in the basic

display with the information HEATING.

5.1.2.5.6 Continuous lowering operation

The RED. HEATING operating mode causes continuously reduced heating operation based on the specified lowered room

temperature. On the heating circuit levels, the reduced operating mode ECO (frost-protected deactivation mode) or RED (lowering mode) is set accordingly. The minimum temperature limit of the respective heating circuit must be taken into account.

See the "Direct Circuit" or "Mixed Heating Circuit 1" / "Mixed Heating Circuit 2" menu, reduced parameter = reduced operation and 12 parameter = minimum temperature limit.

Hot-water production occurs continuously based on the specified hot-water economy temperature (see "DHW" menu, hot water parameter = hot water at night).

32 EN2H-0221GE51 R0808

SDC / DHC Operation

NOTE

Display

Application

NOTE

The RED. HEATING operating mode remains active until another operating mode is activated.

Activated continuous lowering operation appears in the basic display with the information RED. HEATING.

In standby mode, the entire system is switched off and protected from frost (all frost-protection functions active).

Hot-water production is disabled and protected from frost. At storage temperatures below 5 °C, a reload to up to 8 °C takes place.

Total deactivation of heating and hot water with full building protection.

The heat generator and hot-water production remain in operation in case of external demand or demand by other heating circuits on the bus network. The heating circuit pumps are switched on briefly every day (pump anti-blocking protection).

The standby mode remains active until another operating mode is activated.

Display

Activated continuous standby mode appears in the basic display with the information STANDBY.

5.1.2.6 "Switching time programs / Holiday programs" button

Using this button, you can create individualised switching time programs for heating and hot-water operation and set holiday mode.

See 5.1.2.6.1 Holiday mode, pg. 34 and 5.2.2 "Timeprograms" menu, pg. 55.

EN2H-0221GE51 R0808 33

Operation SDC / DHC

5.1.2.6.1 Holiday mode

In holiday mode, the heating circuits can be switched off and protected from frost or operated based on the settings for the RED. HEATING operating mode for the duration of the holiday based on the presetting ("Direct circuit" or "Mixed heating circuit 1" / "Mixed heating circuit 2" menu, parameter 25 = holiday operating mode).

Setting

► Press button.

The menu-selection level Switching time programs / Holiday programs appears in the display.

► Turn input button î to the left.

HOLIDAY appears in the display.

► Press input button î.

HOLIDAY 01 appears in the display.

Application

► Press input button î.

The year flashes in the display.

► Set year with the input button î.

► Press input button î.

The day on which the holiday is to begin flashes in the display.

► Set the day the holiday will begin with the input button î.

► Press input button î.

TIL - - appears in the display.

► Set the day you will return from holiday with the input

button î.

► Press input button î.

The desired holiday timeframe is saved.

You can now enter additional holiday timeframes (up to 15 holiday blocks).

Longer absence while heating operation is active.

34 EN2H-0221GE51 R0808

SDC / DHC Operation

Control during

holidays

Cancellation

Factory setting

Setting range

Display

At outside temperatures below the frost-protection limit (see

5.2.3 "System Parameters" menu, pg. 72) the heating circuits are

controlled as follows:

• Without wall devices: Based on a lowered room temperature specification of 3 °C.

• With wall devices: Based on the room frost-protection limit of the respective heating circuit of 10 °C (see "Direct Heating Circuit" or "Mixed Heating Circuit 1", "Mixed heating circuit 2" menu, parameter 08 = room frost-protection limit).

An active holiday program can be cancelled in case of early return.

► Press and hold the button for approx. 3 seconds until the

following appears in the display: "Holiday off".

Current date

Current date... (current date + 250 days)

An active holiday program appears in the basic display with information on the return date.

5.1.2.7 "System information" button

Calls up system information, such as temperatures and counter

data.

The information on the outside temperature appears first after the

¤ button is pressed. Turning the input button î causes the

system temperatures and the counter and consumption states and operating states of the connected system components to

appear. Pressing the input button setpoint values to appear.

Exceptions

NOTE

Collector flow temperature: No setpoint

Solar tank temperature: No setpoint

Outside temperature: Averaged value

The displayed information (see the following example) is independent of the installed or enabled system components and control circuits.

î causes the respective

EN2H-0221GE51 R0808 35

Operation SDC / DHC

Operating overview

Press button

Turn input button to the left Turn input button to the right

Program/operating mode direct heating circuit/pump status

Program/operating mode mixed heating circuit 1/pump status

Actuator of mixed heating circuit 1/status

Program/operating mode mixed heating circuit 2/pump status

Actuator of mixed heating circuit 2/status

Average/current outside temperature value

Outside temperature min. to max. (0:00 to 24:00 hours)

Heat generator temperature setpoint/actual value

Hot-water temperature setpoint/actual value

Flow temperature setpoint/actual value

Flow temp of mixed heating circuit 1 setpoint/actual value

Program/operating mode hot-water circuit/pump status

Heat generator status

Direct heating circuit pump function/status

Variable output 1 function/operating state

Variable output 2 function/operating state

Flow temp of mixed heating circuit 2 setpoint/actual value

Variable input 1 setpoint/actual value

Variable input 2 setpoint/actual value

Operating hours

Activations of heat generator

36 EN2H-0221GE51 R0808

SDC / DHC Operation

Setting time for

automatic return

Setting range

Factory setting

5.1.2.7.1 Temperature displays

If the ¤ button is pressed and held for approx. 3 s, the INFO TIME parameter appears.

With this parameter, the time it takes for automatic return to the basic display can be specified.

OFF No return. The last selected information display

continuously remains in the basic display until the next change.

1 ... 10 min Automatic return from the information level after the

specified time (in 0.5 minute increments).

OFF

Information Display Condition Remarks

Outside temperature (1)

Determined value/Current value

Outside temperature (1)

Outside temperature (2)

Min./max. value (0:00 to 24:00 hours)

Determined value/Current

Outside sensor connected and no fault message

Variable input configured as OS2

Connection OS2 to variable input VI1, VI2 or VI3

value

Outside temperature (2)

Min./max. value (0:00 to 24:00

OS2 connected, no fault message

hours)

EM-SET (energy management setpoint)

Heat generator temperature (1)

"EM-SET" Highest hot-water setpoint

and highest heating circuit setpoint in the system

Setpoint/Actual value

Heat generator specified

Code 1 only appears if BS2 is present

Heat generator temperature (2)

Setpoint/Actual value

Variable input configured as BS2

Connection BS2 to variable input VI1, VI2 or VI3

EN2H-0221GE51 R0808 37

Operation SDC / DHC

Information Display Condition Remarks

Return temperature

Flow sensor of district heating valve VF1

Return sensor of district heating valve VFB

External heat generator disable

Flue gas temperature

Water heater temperature (1)

Setpoint/Actual value

Disabled mode ON/OFF

Limit signal value/Actual value

Setpoint/Actual value

Return sensor connected and one of the functions for return increase is active

With district heating

External heat generator disable (VI1-VI3) specified

Variable input configured as AGF

If hot-water circuit is present

Connection of return sensor to associated variable input 1 or 2, VI can no longer be called up

controllers

External contact to variable input VI1, VI2 or VI3

Connection only to variable input VI1

Code 1 only appears if SF2 is present

Water heater temperature (2)

Water heater temperature controller

Demand via switching contact (VI1)

Demand via switching contact (VI2)

Demand via switching contact (VI3)

Mixed heating circuit 1 flow temperature

Setpoint/Actual value

Load condition ON/OFF

Demand ON/OFF

Setpoint/Actual value

Variable input configured as SF2

Thermostat mode Thermostat instead of sensor

VI configured as demand contact

Mixed heating circuit 1 specified

Connection to variable input VI1, VI2 or VI3

(SF1 only)

External contact to variable input VI1, VI2 or VI3

Mixed heating circuit 1 return temperature

38 EN2H-0221GE51 R0808

Actual value Return temperature with

return maximum limit

SDC / DHC Operation

Information Display Condition Remarks

Mixed heating circuit 2 flow temperature

Mixed heating circuit 2 return temperature

Direct heating circuit room temperature

Mixed heating circuit 1 room temperature

Mixed heating circuit 2 room temperature

Setpoint/Actual value

Actual value Return temperature with

Setpoint/Actual value

Mixed heating circuit 2 specified

return maximum limit

Direct heating circuit specified

Mixed heating circuit 1 specified

Mixed heating circuit 2 specified

Setpoint inquiry without room temperature sensing: Current room setpoint of direct heating circuit

Setpoint inquiry without room temperature sensing: Current room setpoint of mixer heating circuit 1

Setpoint inquiry without room temperature sensing: Current room setpoint of mixed heating circuit 2

Direct heating circuit thermostat function

Mixed heating circuit 1 thermostat function

Mixed heating circuit 2 thermostat function

Solid fuel boiler temperature

Solid fuel boiler buffer temperature

DC THERMOSTAT

MC1 THERMOSTAT

MC2 THERMOSTAT

Actual value VO1/2 configured as

Actual value Solid fuel loading pump at

Thermostat function specified

solid fuel loading pump

OFF = temperature limit exceeded

Connection of FSKF to associated variable input 1 or 2, VI can no longer be called up

variable output, corresponds to KSPF or FPF, depending on configuration

EN2H-0221GE51 R0808 39

Operation SDC / DHC

Information Display Condition Remarks

Buffer tank temperature at top

Buffer tank temperature at bottom

Solar collector flow temperature

Solar tank temperature

Solar collector return temperature

Solar tank switchover temperature

Setpoint/Actual value

Actual value VO1/2 configured as

Actual value Solar loading valve activated

VO1/2 configured as buffer tank loading pump

solar tank loading pump

Connection of PF1 to associated variable input 1 or 2, VI can no longer be called up

Connection of PF2 to variable input VI1, VI2 or VI3

Special sensor

Connection of KRLF to variable input VI1, VI2 or VI3

5.1.2.7.2 Operating states

An operating state inquiry occurs after the information menu is called up by turning the input button anti-clockwise. The following displays appear only under the specified conditions and may not be available (depends on device version).

Information Display Condition Remarks

Direct heating circuit operating status

Mixed heating circuit 1 operating status

Direct heating circuit specified

Mixed heating circuit 1 specified

Heating program: Holiday, Absent Til, Party Til, Auto, Summer, Heating, Red. Heating, Standby

Switching time program: P1 (P2, P3) control mode: Day, RED, ECO

Heating program: Holiday, Absent Til, Party Til, Auto, Summer, Heating, Red. Heating, Standby

Switching time program: P1 (P2, P3) control mode: Day, RED, ECO

40 EN2H-0221GE51 R0808

SDC / DHC Operation

Information Display Condition Remarks

MC1 actuator operating status

Mixed heating circuit 2 operating status

MC2 actuator operating status

District heating valve operating status

Heat generator operating status (st. 1)

Mixed heating circuit 1 specified

Mixed heating circuit 2 specified

District heating valve opens, closes or does not move

Heat generator specified Information on the switching

Mixed heating circuit 1 opens, closes or does not move

Heating program: Holiday, Absent Til, Party Til, Auto, Summer, Heating, Red. Heating, Standby

Switching time program: P1 (P2, P3) control mode: Day, RED, ECO

Mixed heating circuit 2 opens, closes or does not move

With district heating controllers

state of the multi-stage heat generator

Heat generator operating status (st. 2)

Operating status of modulating heat generator

Hot-water circuit operating status

Multi-stage heat generator specified

Modulating burner specified

Hot-water circuit specified

Information on the switching state of the second stage of the heat generator

If a single-stage modulating heat generator is set, display of actual value and setpoint occurs in %

Hot-water program: Holiday, Absent Til, Party Til, Auto, Summer, Heating, Red. Heating, Standby

Switching time program: P1 (P2, P3) control mode: Day, RED, ECO

EN2H-0221GE51 R0808 41

Operation SDC / DHC

Information Display Condition Remarks

Function and status of direct heating circuit pump

Function and status of variable output 1

Outputs specified

based on function

Outputs specified

based on function

Solar (SOP), circulation (CIR), electric heating rod (ELH), feeder (CHP), boiler circuit (KKP1, KKP2), fault message (SMA), return (RLP), buffer (PLP), solid fuel (FSP), heating circuit (HKP), constant (KP), timer (CLOCK)

Function and status of variable output 2

District heating valve volume flow

District heating valve capacity

Heat generator (1) start-ups

Outputs specified

based on function

Heat generator specified With district heating

Heat generator specified Information on the number

controllers

of heat generator switch-ons (burner start-ups) of the multi-stage heat generator.

Operating hours of heat generator (1)

42 EN2H-0221GE51 R0808

Heat generator specified Information on the number

of heat generator operating hours of the multi-stage heat generator.

SDC / DHC Operation

Information Display Condition Remarks

Heat generator switch-ons stage 2

Heat generator operating hours stage 2

Test temperature for measurement purposes

Operating status of ext. switching modem

Multi-stage heat generator specified

KVT sensor connected and VI configured.

VI configured as switching modem

Information on the number of heat generator switch-ons (burner start-ups) of the second stage.

Information on the number of heat generator operating hours of the second stage.

Controller-independent test temperature, sensor connection to variable input VI1, VI2 or VI3

Control modes based on the switching state of the modem: AUTO (automatic) STBY (standby), HEAT (continuous heating), RED (continuously reduced).

Solar heating capacity

Solar heat balance

Switch-ons

Solar loading pump

Operating hours

Solar loading pump

VO1/2 configured as solar tank loading pump

Solar loading pump at variable output

EN2H-0221GE51 R0808 43

Operation SDC / DHC

5.1.2.8 "Manual mode" / "Emission measurement" button

5.1.2.8.1 Manual mode

If this button is pressed and held longer than 5 s in the basic display, the controller is switched to manual mode. In this operating mode, the required heat generator temperature is

specified manually with the input button î according to the respective heating need. A controller set to manual mode has no effect in heat circuit expansion.

The heat generator setpoint is set between the minimum and maximum heat generator temperatures and appears flashing at

the bottom left-hand side. The current heat generator temperature appears statically on the right-hand side in the basic display. The set switching differential corresponds to the value of automatic control and is symmetrical to the set value.

Application

NOTE

Controller malfunctions (emergency operation), errors

The maximum heat generator temperature limit is paramount to the heat generator switching differential and stops the heat generator in case of exceedance.

Cancellation

With control devices operated purely as a heating circuit expansion, the setting of the temperature has no effect.

The last value to which the control device adjusted the heat generator temperature appears as a recommendation.

Press button or button, to return to the last selected operating mode.

44 EN2H-0221GE51 R0808

SDC / DHC Operation

5.1.2.8.2 Emission measurement (not with district heating controllers)

ATTENTION

Emission measurements may only be carried out by the chimney sweep.

Pressing the button controls the heat generator for a duration of 20 min based on the set maximum temperature limit. The remaining time is displayed and counted down.

With two-stage heat generators, both stages are in operation (measurement at nominal output).

Function

The heat generator is adjusted to the maximum heat generator temperature. All heating circuits and the hot-water production adjust their setpoint to the respective maximum temperature.

Application

Cancellation

ATTENTION

There is a danger of scalding by hot water, as the hot-water temperature can exceed the set setpoint temperature.

Emission measurement by the chimney sweep.

Emission measurement can be cancelled at any time with the

or button.

EN2H-0221GE51 R0808 45

Operation SDC / DHC

5.1.2.9 Access to the technician / OEM area

Entering a technician or OEM code enables additional setting options in the parameter menu. The technician code is: 1234.

For access to the OEM area, please ask your field-service contact partner.

Procedure:

► Press the and buttons simultaneously. The first

number of the 4-digit code flashes.

► Set the first code number by turning the input button.

► Press the input button. The second number flashes.

► Enter all remaining code numbers as described in Steps 2 and

3. After entering the last code number, the controller is enabled for the respective area (technician or OEM).

► Press and hold the rotary button longer than 3 seconds. You

reach the menu-selection level and can enter / modify parameters.

Pressing the button jumps back to the previous selection.

Pressing the button, pressing and holding the input button longer than 3 seconds or waiting until the set info time expires causes a jump back to the basic display.

46 EN2H-0221GE51 R0808

SDC / DHC Operation

5.1.2.10 Heating curve

Determines the heating curve for the heating circuits.

The heating curve describes the relationship of the flow

temperature change to the outside temperature change. With a larger heating surface, such as with floor heaters, the heating curve has a less extreme slope than with a smaller heating surface (e.g. radiators).

The set value refers to the lowest outside temperature used for heat demand calculation.

ATTENTION

This parameter must be set by the technician and should no longer be changed.

Setting

► Press and hold input button î for 3 s.

Setting range

► Turn the input button î to select the desired heating circuit (HC,

MC-1 or MC-2) and confirm it by pressing the input button î. The design temperature (system) appears at the bottom righthand side of the display.

► Press input button î.

The slope of the heating curve appears at the bottom left-hand side of the display.

► Set the flashing heating curve value by turning the input button

î (design temperature also flashes and is changed

automatically depending on the slope of the heating curve).

► Confirm by pressing the input button î.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

► Press

0,2 ... 3,5

button to return to the basic display.

EN2H-0221GE51 R0808 47

Operation SDC / DHC

Factory setting

Direct heating circuit (HC) = 1,5

Mixed heating circuit 1 (MC-1) =

Mixed heating circuit 2 (MC-2) =

x Boiler / flow temperature [°C]

y Outside temperature [°C]

a T

room

[°C]

5.2 Menu-selection level

The control device contains a menu-selection level that is structured differently, depending on the respective device version.

Access

► Press and hold input button î for approx. 3 seconds.

The menu selection always begins with the TIME – DATE

menu.

► Turn input button î to select additional menus.

► Press input button

î to confirm the selected menu.

48 EN2H-0221GE51 R0808

SDC / DHC Operation

Variable input 2

Climate zone

Temperature offset

of heat generator

during hot-water

circuit loading

Room thermostat

function

Room thermostat

function

Burner switching

differential II

Starting point of

flexible district

heating return

temperature

Heat balance

Buffer discharge

protection

Quick hot-water

connection

Variable output 2

test

Fault message 9

Sensor of variable

input 2

Variable input 1

Demand contact

module for variable

input 3

Tank discharge

protection

Room frost

protection limit

Room frost

protection limit

Burner switching

differential I

Max. return

temperature

setpoint

Priority parallel

switch-over

Buffer start-up

protection

Switch-over of

base load with

grouping

Variable output 1

test

Fault message 8

Sensor of variable

input 1

Variable output 2

Demand contact

module for variable

input 2

Hot-water circuit

control mode

Heating limit

Minimum burner

runtime

Runtime of district

heating valve 2

Heat generator

cycle disable

Follow-up switch-

off differential

Peak-load stage

Tank loading pump

test

Fault message 7

Buffer sensor of

collector

Variable output 1

Demand contact

module for variable

input 1

Max. temperature

limit for hot-water

circuit

Sensor control

mode

Runtime of district

heating valve 1

Control mode

Switch-on

differential

extension

Guidance stage

Mixer motor 2 test

Fault message 6

Collector sensor

Direct heating

circuit pump output

System frost

protection

Transducer for hot-

water circuit

Limit mode of

maximum limit

Adjustment time

Buffer maximum

temperature limit

Heat generator

cycle disable

Forced discharge

Stage reversal

Mixed heating

circuit pump 2 test

Fault message 5

Mixed heating

circuit 2 flow

sensor

Switch-over

Mixed heating

circuit 2 output

Summer/Heat limit

Legionella

protection

temperature

Room factor

Maximum

temperature limit

Secondary flow

boost

Collector

maximum

temperature

Switch-off

differential

Buffer switching

differential

Switch-over

capacity of stage

sequence

Mixed heating

circuit 2 bus

authorisation

Mixer motor 1 test

Fault message 4

Mixed heating

circuit 1 flow

sensor

Day - Month

Mixed heating

circuit 1 output

Operating mode

Legionella

protection time

Room connection

Minimum

temperature limit

District heating

valve minimum

travel

Follow-up time of

pump

Solar loading

pump minimum

runtime

Switch-on

differential

Boiler temperature

offset

Regulation

Switch-off delay

Year

Hot-water loading

pump output

Time program

Legionella

protection day

Heating system

Start-up protection

Maximum flow

temperature

setpoint limit

Switch-off

differential

Switch-off

differential

Max. temperature

Connection delay

Time

Hydraulic

schematic

Language

selection

Hot water at night

Reduced operation

Design

Heating curve

slope

Heating curve

slope

Offset

Return

temperature

setpoint

Switch-on

differential

Min. temperature

Regulation

Switching

differential

Mixed heating

Direct heating

circuit 1 bus

circuit bus

Central device

Mixed heating

authorisation

circuit pump 1 test

Fault message 3

Hot-water sensor

authorisation

Direct heating

circuit pump test

Fault message 2

Heat generator

sensor

address

Heat generator

test

Fault message 1

Outside sensor

Parameter

Date

Hydraulics

System parameter

Programming

Configuration

Hot water

Direct heating

circuit

Mixed heating

circuit 1/2

Heat generator

District heating

Return increase

Solar

Configuration

(heating circuits,

control paths)

Solid fuel

Buffer

Total flow control

Cascading

Data bus

Relay test

Fault messages 1/2

Sensor calibration

Service functions

EN2H-0221GE51 R0808 49

Operation SDC / DHC

Behaviour

heat

Max

return

Frost protection

mode

Sample time Ta

Modulation of

proportional part

Fault message 19

Cycle temperature

enable

P-part Xp

generator during

extended running

time

Return maximum

Type code

Circulation pump

Screed function

temperature limit

Flue gas

Screed function

Flue gas

temperature

Fault message 18

temperature limit

Fault message 17

monitoring

Switch-over

temperature

Fault message 16

Locking code for

heating technician

Follow-up time of

pump

Follow-up time of

pump

Charging pump

extended running

time

Max. volume flow

Solar loading

switch-over test

cycle

Fault message 15

Automatic set

function

Economy interval

cycle

Temperature offset

of heating circuit

Temperature offset

of heating circuit

Boiler circuit pump

extended running

time

Max. thermal

output

Final switch-off

temperature

Fault message 14

Logical fault

messages

Circulation pump

economy interval

pause

Maximum

temperature limit

Maximum

temperature limit

Flow time of boiler

circuit pump or

parallel heat

generator enable

Calibration of

volume flow

Heat capacity of

medium

Anti-blocking

function

Circulation pump

switching time

program

Minimum

temperature limit

Minimum

temperature limit

Hot-water circuit

loading 1-2 stage

Calibration of

thermal output

Density of medium

oa er

Indirect return

increase via mixed

heating circuit

Automatic exit time

Hot-water loading

pump extended

running time

Constant

temperature

setpoint

Constant

temperature

setpoint

Boiler start-up

discharge stage II

District heating

valve return limit

Volume flow

Variable input 3

Building type

Switching

differential of hot-

water circuit

Assignment of

outside sensor

Assignment of

outside sensor

Connection delay

stage II

temperature

setpoint during

hot-water circuit

Reset heat

balance

pump extended

running time

Buffer control

mode

System

Fault message 13

circuit 2 room

sensor

Fault message 12

circuit 1 room

sensor

Fault message 11

Direct heating

circuit room sensor

Fault message 10

Sensor of variable

input 3

Parameter

Date

Hydraulics

System parameter

Programming

50 EN2H-0221GE51 R0808

Configuration

Hot water

Direct heating

circuit

Mixed heating

circuit 1/2

Heat generator

District heating

Return increase

Solar

Configuration

(heating circuits,

control paths)

Solid fuel

Buffer

Total flow control

Cascading

Data bus

Relay test

Fault messages 1/2

Sensor calibration

Service functions

SDC / DHC Operation

Heating

circuit

differential

curve for

emergency

operation without

outside senso

Heat generator

forced discharge

Fault memory 2

temperature of

mixed heating

circuit

minimum

temperature limit

switching

Heating circuit

minimum

temperature limit

Room setpoint

ramp

Room setpoint

ramp

Base load offset

Cooling switch-on

temperature

Holiday control

mode

Holiday control

mode

Outside

temperature

disable

Locking code for

Adjustment of the

real time clock

Room control Tn

Modulation of start

power

operating level

Room control C-

factor

Room control C-

factor

Modulation of start

time

Actuator end

position function

Modulation of

runtime

(RTC)

Actuator runtime

Modulation of

adjustment time Tn

Reset fault

messages

I-part Tn

Modulation of

sample time Ta

Fault message 20

Parameter

Date

Hydraulics

System parameter

Programming

Configuration

Hot water

Direct heating

circuit

Mixed heating

circuit 1/2

Heat generator

District heating

Return increase

Solar

Configuration

(heating circuits,

control paths)

Solid fuel

Buffer

Total flow control

Cascading

Data bus

Relay test

Fault messages 1/2

Sensor calibration

Service functions

EN2H-0221GE51 R0808 51

Operation SDC / DHC

Hot-water circuit

pre-control spread

Resetting of stage

1 burner start-up

and operating hour

counters

Inverse outside

temperature

disable

Burner counter

mode

Parameter reset

Selection

Hot-water capacity

limit

Heating capacity

limit

SDC/DHC

Full-load control

OEM maximum

limit

Parameter

Date

Hydraulics

System parameter

Programming

Configuration

Hot water

Direct heating

circuit

Mixed heating

circuit 1/2

Heat generator

District heating

Return increase

Solar

Configuration

(heating circuits,

control paths)

Solid fuel

Buffer

Total flow control

Cascading

Data bus

Relay test

Fault messages 1/2

Sensor calibration

Service functions

52 EN2H-0221GE51 R0808

SDC / DHC Operation

Offset

valve

control

rcu

ng c

name

Heating circuit

name

Heating circuit

name

Lowering ramp

Pre-heat time at

0°C

Pre-heat time at

0°C

Without room

sensor

Without room

sensor

Parameter

Date

Hydraulics

System parameter

Min. jump back

temperature

Min. jump back

temperature

Max. pre-heat time

Min. pre-heat time

Switch-on

optimisation

Switch-on

optimisation

position of hot-

water circuit pre-

Resetting of stage

2 burner start-up

Hot water

Direct heating

circuit

Mixed heating

circuit 1/2

OEM

Heating technician

User

and operating hour

counters

Heat generator

District heating

Return increase

Solar

Solid fuel

Buffer

Total flow control

Cascading

Data bus

Relay test

Fault messages 1/2

Sensor calibration

Programming

Configuration

(heating circuits,

control paths)

Service functions

EN2H-0221GE51 R0808 53

Operation SDC / DHC

5.2.1 "Time - Date" menu

The following current calendar values can be specified in this menu:

• Time

• Year

• Day - Month

• Time change mode (summer / winter time)

NOTE

All listed daytime values are set at the factory and generally do not need to be updated.

An internal, pre-programmed calendar ensures automatic time change on the annually recurring summer / winter time switchover dates. If necessary, the automatic time change can be deactivated. The current weekday, Mo to Su is determined from the calendar date and does not need to be set.

Application

Access

Setting

Corrections for rare fault cases

See 5.2 Menu-selection level, pg. 48

► Turn input button î and select the "Time - Date" menu.

Returning

► Turn input button î and select the desired calendar value

(time, year, day - month, change).

► Press input button

turning the input button

î and change the corresponding value by

î.

► Press input button î to confirm the set value.

► Turn input button î to select and change additional calendar

values.

Returning to the basic display takes place by pressing the button or automatically after the set information time (see

5.1.2.7 "System information" button, pg. 35).

54 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.2 "Timeprograms" menu

Individualised switching time programs for heating and hot-water operation can be created in this menu. Here, the factory-set default programs P1 (and, if enabled, P2 and P3 as well) of each heating circuit and the hot-water circuit are overwritten by individualised switching times and temperature specifications. This is especially advantageous if correspondingly adapted heating programs are to be created in case of periodically recurring assignments with different assignment times (e.g. shift work). Max. three heating cycles, each with a switch-on and switch-off time, are available for each day of the week for programming switching times. Each heating cycle can also be combined with a freely-selectable temperature specification.

NOTE

The default programs are not lost when overwritten by individually created programs. Individualised programs, however, are deleted when default programs are reloaded and must be recreated. For this reason, individualised switch-on / switch-off times and temperature specifications should always be entered in the tables provided for this purpose (see 9 Log, pg. 254).

Access

Returning

Press button.

Returning to the basic display takes place by pressing the button or automatically after the set information time (see

5.1.2.7 "System information" button, pg. 35).

EN2H-0221GE51 R0808 55

Operation SDC / DHC

5.2.2.1 Selection of the control circuit

After accessing the "Timeprograms" menu, the desired control circuits can be selected with the input button î in the following

sequence:

• Direct heating circuit (HC)

• Mixed heating circuit 1 (MC-1)

• Mixed heating circuit 2 (MC-2)

• Hot-water circuit (DHW)

► Press input button î to access the selected circuit.

5.2.2.2 Selection of the program

If the switching time programs P2 and P3 have been enabled (see "System Parameter" menu, program parameter = P1 to P3), the program selection appears.

If switching time programs P2 and P3 are disabled, program selection is automatically skipped (see "System Parameters" menu, program parameter = P1).

5.2.2.3 Selection of day of the week and cycle

Once the program is selected, the first cycle of the first day of the week (MO 1) and the relevant section in the top time bar flash.

The other cycles are selected by turning the input button î and confirmed by pressing the input button î.

56 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.2.4 Programming switching times and cycle temperatures

5.2.2.4.1 Switch-on time

The switch-on time is the start of heating or, with enabled switchon optimisation, the start of assignment.

After selecting the day of the week and the corresponding cycle, the respective switch-on time appears flashing and can be set

with the input button î. The time bar in the top part of the display provides an overview of all programmed cycles between 0:00 and 24:00 hours on the selected day of the week.

NOTE

The switch-on time cannot be set below the switch-off time of a previous cycle or below 0:00 hours of the selected day of the week.

If the switch-on time is changed, the corresponding time bar display is adjusted to the left-hand side.

If the switch-on time is made equal to the switch-off time, the corresponding cycle is deleted. A subsequent cycle is automatically shifted to the position of the deleted cycle upon acceptance.

With subsequent insertion of a cycle that has been bumped up, the corresponding day of the week must be reprogrammed.

A flashing switch-on time is accepted by pressing the input button

5.2.2.4.2 Switch-off time

The switch-off time is the end of heating or, with enabled switchoff optimisation, the end of assignment.

Once the switch-on time is accepted, the associated switch-off time appears flashing and can be changed with the input button î. The

time bar in the top part of the display provides an overview of all programmed cycles between 0:00 and 24:00 hours on the selected day of the week.

î.

EN2H-0221GE51 R0808 57

Operation SDC / DHC

NOTE

5.2.2.4.3 Cycle temperature

The switch-off time cannot be set higher than the switch-on time of a subsequent cycle.

If the switch-on time is changed, the corresponding time bar display is adjusted to the right-hand side.

If the switch-off time is made equal to the switch-on time, the corresponding cycle is deleted. A subsequent cycle is automatically shifted to the position of the deleted cycle upon acceptance.

With subsequent insertion of a cycle that has been bumped up, the corresponding day of the week must be reprogrammed.

A flashing switch-off time is accepted by pressing the input button î.

Once the switch-off time is accepted, the associated cycle temperature appears flashing and can be changed immediately

with the input button î. With heating circuits, the displayed cycle temperature is always based on the desired room temperature; with the hot-water circuit, it is based on the desired normal hotwater temperature in the selected cycle.

A flashing cycle temperature is accepted by pressing the input button î.

At the same time, the last called-up cycle appears flashing so that it may be monitored; additional cycles can then be selected directly and edited in the same way in the order: switch-on time, switch-off time, cycle temperature.

58 EN2H-0221GE51 R0808

SDC / DHC Operation

Switching time programming (programs P2 and P3 disabled)

Upon accessing the menu-selection level, the "Timeprograms" menu always appears first.

Enabling of programs P2 and P3 in the "System Parameters"

menu (see 5.2 Menu-selection level, pg. 48 ).

Select heating circuit:

Select day and cycle:

Change:

HC MC -1 MC -2 DHW

MoHcy-1

Start of heating

End of heating

Temperature

MoHcy-2

Monitoring

MoHcy-3

Only appears if there are switching times in the second heating cycle.

TuHcy-1

We Th Fr Sa

Default time

SuHcy-3

Copy circuit

Copy day

Return:

3 s

Return to the basic display:

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

Hcy Heating cycle

EN2H-0221GE51 R0808 59

Operation SDC / DHC

Default switching time program (P1) for heating and hot water

Uniform, continuous heating and hot-water operation on all days of the week

Default program P1

Heating operation Heating circuit Day

from to

Heat generator heating circuit

Hot-water circuit Mo to Su 5:00 22:00

Mixed heating circuit 1 / 2 Mo to Su 6:00 22:00

Mo to Su 6:00 22:00

60 EN2H-0221GE51 R0808

SDC / DHC Operation

Switching time programming (program P2 and P3 enabled)

Upon accessing the menu-selection level, the "Timeprograms" menu always appears first. Enabling of programs P2 and P3 in the "System Parameters" menu (see 5.2 Menu-selection level, pg. 48 ).

Select heating circuit:

Select program:

Select day and cycle:

Change:

P1 P2 P3

MoHcy-1

Start of heating

End of heating

Temperature

MC -1 MC -2 DHW

MoHcy-2

Monitoring

Default time

We MoHcy-3

Only appears if there are switching times in the second heating cycle

TuHcy-1

SuHcy-3

Copy circuit

Copy day

Return:

3 s

Return to the basic display:

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

Hcy Heating cycle

EN2H-0221GE51 R0808 61

Operation SDC / DHC

Default program P1

Heating operation Heating circuit Day

from to

Heat generator heat-

Mo to Su 6:00 22:00

ing circuit

Hot-water circuit Mo to Su 5:00 22:00

Mixed heating

Mo to Su 6:00 22:00

circuit 1 / 2

Default program P2

Heating operation Heating circuit Day

from to from to

Mo to Th 6:00 8:00 16:00 22:00

Boiler heating circuit

Fr 6:00 8:00 13:00 22:00

Sa to Su 6:00 22:00

Mo to Th 5:00 8:00 15:30 22:00

Hot-water circuit

Fr 5:00 8:00 12:30 22:00

Sa to Su 6:00 23:00

Mixed heating circuit 1 / 2

Default program P3

ing circuit

circuit 1 / 2

Mo to Th 6:00 8:00 16:00 22:00

Fr 6:00 8:00 13:00 22:00

Sa to Su 7:00 23:00

Heating operation Heating circuit Day

from to

Mo to Fr 7:00 18:00 Heat generator heat-

Sa to Su Reduced

Mo to Su 6:00 18:00 Hot-water circuit

Sa to Su Reduced

Mo to Su 7:00 18:00 Mixed heating

Sa to Su Reduced

62 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.2.4.3.1 Copying switching time programs (days)

Block programming enables the switching times and cycle temperatures of any day of the week to be copied

1 – To any days within the week (Mo, Tu, We, ..., Su)

2 – To all weekdays (Mo to Fr)

3 – To the weekend (Sa to Su)

4 – To the entire week (Mo to Su)

Calling up the copy function (days)

See flowcharts on pg. 65

Source day

► Press input button î to confirm the copy function.

Target day

► Turn input button î to select the source day (MO to SU) to be

copied. The respective automatic program P1 (P2, P3) of the source day is copied in the display with the time switch symbol and the program index.

► Press input button î to confirm the source day.

The source day appears flashing.

► Turn input button î to select the following setting values and

confirm by pressing the input button

î:

• The following target days (Mo to Su) individually

• All days of the week (1 to 7) as a week block

• All weekdays (1 to 5) as a weekday block

• The weekend days (6 to 7) as a weekend block

Acceptance is confirmed by acknowledging DAY COPY OK.

After acknowledgement, the following target days appear one after another automatically with each additional press of the input

button

î and can be skipped and accepted if necessary.

Pressing the button causes an immediate return to the basic display.

NOTE

Only complete days with all cycles and temperature specifications and the respective program can be copied.

EN2H-0221GE51 R0808 63

Operation SDC / DHC

5.2.2.4.3.2 Copying switching time programs (heating circuits)

Block programming also enables the copying of all switching times and temperature specifications of a heating circuit to another heating circuit.

Calling up the copy function (heating circuits)

See flowcharts on pg. 65

Source circuit

► Press input button î to confirm the copy function.

► Turn input button î to select the source circuit to be copied

(HC, MC-1, MC-2, DHW). If automatic program P1, P2 or P3 (see "System Parameter" menu, PROGRAM parameter = P1 to P3) was enabled, the desired switching time program P1, P2 or P3 of the source circuit can be selected. If not enabled, program selection is skipped.

Target circuit

► Press input button î, to confirm the source circuit.

Based on the same chart, the desired target circuit and, if enabled, the desired program can be selected and accepted.

NOTE

Acceptance is confirmed by acknowledging COPY OK. The copy function is then called up again to copy additional circuits, if necessary.

Heating circuits cannot be copied to hot-water circuits or the reverse due to the different temperature specifications. If a heating circuit (HC, MC-1, MC-2) is selected as the source circuit, the hotwater circuit (DHW) switches off as the target circuit.

A hot-water circuit as the source circuit is also the target circuit. In this case, only switching time programs P1 to P3 are copied among one another.

Pressing the

button causes an immediate return to the basic

display.

64 EN2H-0221GE51 R0808

SDC / DHC Operation

Block programming

The copy function enables a source day to be copied to any target days or to all days of the week (week programming). All cycles of the source day are copied. Individual heating cycles cannot be copied.

Select heating circuit:

Select program:

Select copy function:

P1 P2 P3

Mo Hcy-1

Mo Hcy-2

MC -2MC -1

Mo Hcy-3

DHW

Tu Hcy-1

We Th Fr Sa

Default time

Su Hcy-3

Copy circuit

Copy day

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

1) Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the "System Parameter" menu.

EN2H-0221GE51 R0808 65

Operation SDC / DHC

Copy day

Select source day: Example: Monday

Select first target day: Example: Tuesday

Copy source day to first target day:

Acknowledge:

Select second target day: Example: Wednesday

Copy from Mo

Copy Mo to Tu

Copy day OK

Copy Mo to We

Mo ... Su

Source day

1 target day or 1-7 (Mo ... Su) or 1-5 (Mo ... Fr) or 6-7 (Sa ... Su)

Tuesday as with Monday

Source day

Second target day

Copy source day to second target day

Acknowledge:

Copy day OK

Wednesday as with Monday

Select and copy other target days if necessary

Return to the basic display:

66 EN2H-0221GE51 R0808

SDC / DHC Operation

Copying heating circuits

Select copy function:

Select source circuit:

Select source circuit program:

NOTE

Heating circuits cannot be copied to hot-water circuits since they have different cycle temperatures: If a heating circuit is selected as the source circuit, the hot-water circuit can no longer be called up as the target circuit. The hot-water circuit as the source circuit is also the target circuit. In this case, only programs of the hotwater circuit are copied among one another if they were enabled in the "System Parameter" menu.

HC MC-1 MC-2 DHW

Source circuit HC

Source circuit HC P1

Source circuit MC -1

Source circuit MC -1 P2

Source circuit MC -2

Source circuit MC -2 P3

Default time

Copy circuit

Select target circuit:

Select target circuit program:

Copy:

Acknowledge:

Exit:

Target circuit HC

Target circuit MC -2 P1

Copy

-OK-

Basic display

Target circuit MC -1

Target circuit MC -2 P2

Target circuit MC -2

Target circuit MC -2 P3

Program P1 (direct heating circuit) = Program P2 (mixed heating circuit 2)

Copy additional heating circuits if necessary

EN2H-0221GE51 R0808 67

Operation SDC / DHC

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

1) Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the "System Parameter" menu.

5.2.2.4.4 Reloading default programs

See flowchart on pg. 70

Individually created switching time program P1, P2 or P3 can be overwritten with the original default switching time program P1, P2 or P3.

Resetting

For this purpose, select the DEFAULT-TIME function within the heating circuit selection after accessing the "Timeprograms" menu.

After confirming by pressing the input button î, the circuit dedicated to reloading appears flashing (HC, MC-1, MC-2, ALL).

If the automatic programs P1, P2 and P3 (see "System

Parameter" menu, program parameter = P1 to P3) were enabled,

the desired switching time program P1, P2 or P3 of the heating circuit affected by the reload can be selected. If not enabled, program selection is skipped.

Resetting then occurs by pressing and holding the input button approx. 5 s until acknowledgement appears in the display.

Resetting is confirmed by acknowledging COPY OK.

The DEFAULT-TIME function is then called up again to replace other circuits with their default programs if necessary.

68 EN2H-0221GE51 R0808

SDC / DHC Operation

ATTENTION

With the setting value ALL, all heating circuits and the hotwater circuit are overwritten with their default switching times with regard to the selected program.

When overwriting occurs, individually created switching time programs are permanently lost and must be recreated from scratch.

Pressing the button causes an immediate return to the basic display.

EN2H-0221GE51 R0808 69

Operation SDC / DHC

Reloading default programs

Switching time programs P2 and P3 disabled

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

70 EN2H-0221GE51 R0808

SDC / DHC Operation

Reloading default programs

Switching time programs P2 and P3 enabled

DHW

HC Direct heating circuit

MC-1 Mixed heating circuit 1

MC-2 Mixed heating circuit 2

DHW Hot-water heating circuit

EN2H-0221GE51 R0808 71

Operation SDC / DHC

5.2.3 "System Parameters" menu

The system parameters refer to general limiting parameters and specification values within the heating system.

Access

Returning

See 5.2 Menu-selection level, pg. 48

Returning to the basic display takes place by pressing the button or automatically after the set information time (see

5.1.2.7 "System information" button, pg. 35).

5.2.3.1 Language selection

Several languages can be selected for all information that appears in the display.

Setting values

After selecting the language and confirming it by pressing the input button î, additional communication takes place in the

respective language.

DE German

GB English

FR French

IT Italian

NL Dutch

ES Spanish

PT Portuguese

HU Hungarian

CZ Czech

PL Polish

RO Romanian

RU Russian

TR Turkish

S Swedish

N Norwegian

Factory setting

German

72 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.3.2 Time program

This parameter specifies enabling of the switching time programs for program selection and for individualised switching time programming. In the state of delivery, only one switching time program is enabled. This achieves simplification of operation with a large portion of applications for which only one switching time program is used.

Set values

P1 Program 1 = enabled, programs 2 and 3 = disabled

P1 to P3 All three programs enabled

Factory setting

Effects

In contrast to the previous description, the following setting options are available when programs P1 to P3 are enabled:

• Operating mode selection: In the AUTOMATIC and SUMMER

operating modes, switching time program P1, P2 or P3 can be selected.

• Switching time programming: With switching time pro-

gramming, the three switching time programs, P1 to P3, can be selected for each heating circuit.

5.2.3.2.1 Control mode selection

In the AUTOMATIC and SUMMER control modes, switching time program P1, P2 or P3 can be selected.

5.2.3.2.2 Switching time programming

With switching time programming, the three switching time programs, P1 ... P3 can be selected.

EN2H-0221GE51 R0808 73

Operation SDC / DHC

5.2.3.3 Operating mode

Two operating modes can be selected. They determine whether the operating mode, the daytime temperature and the night-time temperature apply for all heating circuits or can be specified individually for each heating circuit.

Setting range

Set values

1, 2

1 The selected setting applies for all heating circuits together.

2 Each heating circuit can be assigned an individualised set-

ting.

Factory setting

5.2.3.3.1 Individualised daytime room temperature for each heating

Setting

Setting range

Factory setting

circuit

► Press ¥ button.

► Select desired heating circuit (HC, MC-1 or MC-2) by turning

the input button î.

► Confirm selected circuit by pressing the input button î.

► Set flashing room temperature specification to the desired

value by turning the input button

î.

► Confirm set value by pressing the ¥ button.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

5 ... 30 °C

20 °C

74 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.3.3.2 Individualised night-time room temperature for each heating circuit

Setting

Setting range

Factory setting

5.2.3.3.3 Individualised operating mode for each heating circuit

► Press ¦ button.

► Select desired heating circuit (HC, MC-1 or MC-2) by turning

the input button î.

► Confirm selected circuit by pressing the input button î.

► Set flashing room temperature specification to the desired

value by turning the input button î.

► Confirm set value by pressing the ¦ button.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

5 ... 30 °C

16 °C

Setting

Each heating circuit can be assigned an individualised operating mode.

► Press button.

► Select desired heating circuit (HC, MC-1 or MC-2) by turning

the input button

► Confirm selected circuit by pressing the input button

î.

► Select flashing operating mode by turning the input button î.

► Confirm set operating mode by pressing the button or the

input button î.

► With short-term operating modes (ABSENT, PARTY), set

desired target value by turning the input button î and confirm set value by pressing the input button î.

Alternative: Automatic acceptance of the value after the set information time (see 5.1.2.7 "System information" button, pg. 35).

This parameter specifies the end of heating operation depending on the outside temperature based on the following criteria:

EN2H-0221GE51 R0808 75

Operation SDC / DHC

Quick increase in outside temperature

If the averaged outside temperature is below the set value and the current outside temperature is 2 K above the set value, heating operation is interrupted.

Slow increase in outside temperature

Deactivation is also initiated when the averaged and current outside temperature exceeds the set value.

Undoing deactivation

Deactivation is undone when the averaged and current outside temperature exceeds the set value by 1 K.

The summer deactivation function is undone:

NOTE

Factory setting

Setting range

• In case of an outside sensor defect

• In case frost protection is active

During deactivation phases (standby mode, manual summer operation, summer deactivation) lasting longer than 24 hours all pumps are switched on for approx. 20 s and the mixers are temporarily opened during this time to protect against blocking by corrosion.

In connection with a second outside sensor, the current averaged outside temperature is accepted for summer deactivation if the average value of both sensors is specified during outside sensor assignment.

Active summer deactivation is represented by a beach umbrella symbol in the basic display.

Only active in the AUTOMATIC operating mode.

20 °C

OFF, set value of system frost protection to 40 °C

5.2.3.4 Parameter reset

With the reset parameter, it is possible to reset any inadvertently made changes in the parameter menu to the factory setting.

76 EN2H-0221GE51 R0808

SDC / DHC Operation

ATTENTION

A reset should only be carried out if all individually entered values are to be replaced by the values specified at the factory.

Setting

► When the PARAM. RESET display flashes, press the input

button î. SET flashes in the display.

► Press and hold the input button î for 5 s.

If a reset is carried out, the RESET OK confirmation appears

briefly. Verification is then started with a call-up of the first parameter in the respective menu once again.

After the parameter values are reset, a return to the first parameter in the "System Parameter" menu occurs.

5.2.3.5 Complete reset

To reset all settings, a complete reset of the device can be carried out.

A complete reset is initiated when the , ¥, ¦ and § keys are pressed simultaneously until the controller restarts.

5.2.4 "DHW" menu

This menu contains all parameters required to program the hotwater circuit, except the hot-water switching time programs.

EN2H-0221GE51 R0808 77

Operation SDC / DHC

5.2.4.1 Night-time hot-water temperature

This parameter specifies the temperature in the hot-water generator between the operational-readiness times in automatic mode.

Factory setting

Setting range

NOTE

40 °C

5 °C to set normal hot-water temperature value

If a hot-water thermostat (see parameter 05 = transducer for hotwater circuit) is used to detect the hot-water temperature, this parameter is skipped.

5.2.4.2 Legionella protection day

Factory setting

Setting range

Set values

NOTE

5.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed

OFF

OFF, MO to SU, ALL

OFF The legionella protection function is not active.

MO to SU Legionella protection is activated on the selected

day of the week at the legionella protection time set in the following parameter.

ALL The legionella protection function is activated daily

at the legionella protection time set in the next parameter.

If a hot-water thermostat (see 05 parameter = transducer for hotwater circuit) is used to detect the hot-water temperature, these parameters are skipped.

Heating Circuit 2" menu

These menus contain all parameters required to program the heating circuit, except the switch time programs. Max. one direct heating circuit and two mixed heating circuits (mixed heating circuit 1 and mixed heating circuit 2) are available as heating circuits.

The following described heating circuit parameters are available separately for setting for each heating circuit.

78 EN2H-0221GE51 R0808

SDC / DHC Operation

5.2.5.1 Reduced operation

During reduced operation, you can select between two operating modes.

Factory setting

Setting range

Set values

ECO

ECO, RED

RED (lowering operation)

The heating circuit pump of the direct heating circuit continues functioning during reduced operation (see 5.2.3.2 Time program, pg. 73). The flow temperature is determined based on the lowered room temperature from the associated reduced heating curve. The set maximum temperature is not undershot.

Application

Building with minimal insulation values and high cooling loss.

Application

NOTE

ECO (switch-off operation)

During reduced operation, the direct heating circuit is switched off completely with outside temperatures above the set frostprotection limit. The maximum heat generator temperature is not functional. The heating circuit pump is switched off after a delay to avoid safety deactivation by reheating the heat generator (pump follow-up).

If the outside temperature is or becomes lower than the specified outside temperature frost-protection limit, the controller switches from deactivated (deactivation mode) to lowered lowering operation and controls the heating circuit temperature based on the set lowering curve taking the set minimum heat generator specification into account.

Building with high insulation values (full heating protection).

The mode set here also applies for the ABSENT and RED.

HEATING operating modes.

EN2H-0221GE51 R0808 79

Operation SDC / DHC

5.2.5.2 Heating system

This parameter refers to the type of the heating system (floor, radiator or convector heating) and can be matched to the exponent of the respective heat distributor. Using its progressive characteristics, the set value determines the curve characteristics of the heating curve of the direct heating circuit and compensates for the losses in output in the low-temperature range with it.

The following settings are recommend depending on the type of heating system:

UFH Slightly progressive heating curves for floor or other

area heating.

RAD Progressive standard heating curves for all radiator

heating with m-values between 1.25 and 1.35.

Factory setting

Setting range

5.3 Error messages

Sensor error

messages

Heat generator error

messages

CONV Progressive heating curves for convector and

baseboard heating.

RAD (radiator systems)

UFH (floor heating) with mixed heating circuits

UFH, RAD, CONV

ATTENTION

Inform the heating technician whenever any fault messages are output.

The control device contains substantial error-notification logic. The error messages appear in continuous alteration with the basic display. Multiple errors that occur at the same time appear one after another in the order in which they occurred. The following types of error message exist:

Sensor measured values that do not lie in the measurement range are evaluated as an interruption or short-circuit. They appear depending on the type and allocation with fault code 10 to 20 and index 0 for short-circuit or 1 for interruption.

These error messages evaluate the respective switching status. They appear depending on the type and allocation with fault code 30 to 40 and index 0, 1 or 2.

80 EN2H-0221GE51 R0808

SDC / DHC Operation

Logical error

messages

These error messages evaluate the control result to be expected. They appear depending on the type and allocation with fault code 50 to 60 and index 0, 1 or 2.

Bus error messages

These error messages refer to address faults such as double issuance or non-recognition of address settings on the data bus. They appear with fault code 70 and index 0 or 1, depending on the type and assignment.

5.4 Parameter settings

5.4.1 "Hydraulics" menu (HYDRAULIC)

The parameters in this menu refer to the general system hydraulics and the functions and configuration of the programmable inputs and outputs for the respective system components. Representative of many individual settings, the applications are only defined by the 1st parameter of this setting table.

Example: The controller is to cover system No 0202. Provided that the controller features enough relays, parameter 01 must be set to value 0202.

Para-

Designation Setting range / Setting values Factory

meter

01 Hydraulic

0, 0101, 0102, ... n 0

schematic

02 Hot-water charging

pump output

OFF No function 1

1 Hot-water charging

4 Circulating pump

5 Electric heating rod

Setting

setting

pump

EN2H-0221GE51 R0808 81

Operation SDC / DHC

Parameter

03 Mixed heating

Designation Setting range / Setting values Factory

circuit 1 output

Setting

setting

OFF No function 3

2 Direct heating circuit

controlled by weather conditions

3 Mixed heating circuit

controlled by weather conditions

6 Constant regulator

7 Fixed-value regulator

8 Return maintenance

30 Mixed heating circuit as

continuous hot-water pre-regulator (district heating)

04 Mixed heating

circuit 2 output

05 Direct heating

circuit pump output

39 Hot-water pre-regulator

(district heating)

For setting values, see parameter 03

OFF No function 2

2 Direct heating circuit

pump

4 Circulating pump

5 Electric heating element

6 Constant regulation

10 Feeder pump

11 Boiler circuit pump 1

12 Boiler circuit pump 2

13 Group alarm

14 Time switch

15 Solar charging pump

25 Cooling switchover

27 Hydraulic buffer relief

82 EN2H-0221GE51 R0808

SDC / DHC Operation

Parameter

06 Variable output 1

Designation Setting range / Setting values Factory

Setting

setting

OFF No function OFF

4 Circulating pump

5 Electrical heating circuit

9 Bypass pump

10 Feeder pump

11 Boiler circuit pump 1

12 Boiler circuit pump 2

13 Group error message

15 Solar charging pump

16 Buffer charging pump

17 Solid fuel charging pump

18 Stratified tank charging

pump (DHC)

19 Solar charging

switchover

25 Cooling switchover

26 Primary pump

27 Hydraulic buffer relief

07 Variable output 2 For setting values, see parameter

OFF

EN2H-0221GE51 R0808 83

Operation SDC / DHC

Parameter

08 Variable input 1

Designation Setting range / Setting values Factory

Setting

setting

OFF No function OFF 1 Outside sensor 2

2 Heat generator sensor 2

3 Tank sensor 2

4 Buffer sensor 2

5 Request contact

6 External error message

input

7 Return maximum limit of

mixed heating circuit 1

8 Return maximum limit of

mixed heating circuit 2

9 Return temperature

sensor

10 External heat generator

cutoff

11 External switching

modem

12 External information

13 Total flow sensor

14 Collector return sensor

15 District hot-water strat-

ified tank charge sensor

16 Exhaust gas sensor

18 Solids buffer sensor

19 Buffer sensor 1

29 Hygrostatic switch-off

30 Room sensor NTC 20 of

direct heating circuit

31 Room sensor NTC 20 of

mixed heating circuit 1

32 Room sensor NTC 20 of

mixed heating circuit 2

84 EN2H-0221GE51 R0808

SDC / DHC Operation

Para-

Designation Setting range / Setting values Factory

meter

09 Variable input 2 For setting values, see parameter

08; does not include setting value 16 (exhaust gas sensor), however

10 Variable input 3 For setting values, see parameter

08; does not include setting value 16 (exhaust gas sensor), limit sensor of district heating VFB, however

11 Indirect return lift-

OFF, ON OFF ing via mixed heating circuit

5.4.2 "System parameters" menu (SYSTEM)

Setting

setting

OFF

Parameter

Language selection**

The parameters in this menu refer to general limit parameters and specification values in the heating system used.

Designation Setting range / Setting values Factory

setting

Language selection

DE German

GB English

FR French

IT Italian

NL Dutch

ES Spanish

PT Portuguese

HU Hungarian

CZ Czech

PL Polish

Setting

RO Romanian

RU Russian

TR Turkish

S Swedish

N Norwegian

EN2H-0221GE51 R0808 85

Operation SDC / DHC

Parameter

program

ing mode

Summer Summer switch-

05 System frost pro-

06 Request contact

Designation Setting range / Setting values Factory

Time program

Operating mode

off

tection

module for variable input 1

P1 Only one switching time

P1 to P3

1 Common adjustment for

2 Separate adjustment for

OFF, setting value of parameter 05 to 30°C

OFF, –20°C to Setting value of summer parameter

1 Direct heating circuit 1

2 Mixed heating circuit 1

3 Mixed heating circuit 2

4 Hot-water circuit

program enabled

Three switching time programs enabled

all heating circuits

the individual heating circuits

Setting

setting

P1 Time

1 Operat-

ALL All controllers

07 Request contact

module for variable input 2

08 Request contact

module for variable input 3

09 Climate zone –50 ... 0°C –12

10 Building type

For setting values, see parameter 06

1 Light construction 2

2 Medium construction

3 Heavy construction

86 EN2H-0221GE51 R0808

SDC / DHC Operation

Parameter

13 Logical fault

14 Automatic set

15* Locking code for

Designation Setting range / Setting values Factory

time

protection

messages

function

heating technician

setting

OFF No automatic exit 2 11 Automatic exit

0,5 ... 5 min

ON Anti-blocking protection

OFF Anti-blocking protection

OFF, ON OFF

OFF, 0001 to 9999 1234

Automatic jump back to the basic display occurs after the set time

active

not active

ON 12 Anti-blocking

Setting

16* Type code Controller type corresponding to

type code table

OFF Cycle temperature

enable

ON Cycle temperatures

OFF Continuous frost

mode

0.5 to 60 min

disabled

enabled

protection as per parameter 05

Cyclic operation

Type

ON 18 Cycle temperature

OFF 19 Frost-protection

EN2H-0221GE51 R0808 87

Operation SDC / DHC

Parameter

21* Adjustment of the

Designation Setting range / Setting values Factory

setting

–10 ... 10 s 0 real time clock (RTC)

23 Locking code for

OFF, 0000 ... 9999 OFF operating level

25 Cooling switch-on

2 ... 10 K 6 temperature

28 Error memory 2 OFF, ON OFF

29* Characteristic

–50 to 30°C 0 curve for emergency operation without outside sensor

Selection of

Selection of SDC/DHC

SDC, DHC SDC

SDC/ DHC

Setting

Parameter reset

Parameter reset SET by pressing the input button –

* OEM

** Other controllers also allow other language variants.

88 EN2H-0221GE51 R0808

SDC / DHC Operation

5.4.3 "Hot-water circuit" menu (DHW)

This menu contains all parameters required to program the hot-water circuit, except the switch time programs.

Parameter

Designation Setting range / Setting values Factory

setting

Setting

Hot

Hot water at night 10°C to normal hot-water

water

Legio protect

Legionella protection day

ion day

03 Legionella

protection time

04 Legionella

protection temperature

water circuit

temperature

OFF No legionella protection OFF

Mon to Sun

ALL Legionella protection

Legionella protection on specified day of week

every day

00:00 ... 23:00 hours 02:00

10 °C to setting value of

parameter 06

1 Hot-water circuit

1 05 Transducer for hot-

temperature sensor

2 Hot-water circuit

temperature controller (thermostat)

06 Maximum

temperature limit for hot water circuit

20°C to heat generator maximum temperature

If parameter 07 = 7:

20 to 90°C. In automatic mode, from hotwater circuit minimum temperature.

EN2H-0221GE51 R0808 89

Operation SDC / DHC

Parameter

07 Hot-water circuit

Designation Setting range / Setting values Factory

1 Parallel operation 2

operating mode

protection

2 Priority operation

3 Conditional priority

4 Parallel operation based

5 Priority operation with

6 Priority isolating circuit

7 External operation

8 Conditional parallel

OFF No discharge protection ON 08 Tank discharge

ON Discharge protection

Setting

setting

on weather conditions

intermediate heating

operation for mixed heating circuit (DHC only)

activated

09 Temperature in-

crease of heat generator with hotwater circuit charging

10 Switching

differential of hotwater circuit

11 Hot-water charging

pump follow-up time

0 ... 50 K

Difference between hot-water circuit charging temperature and hot-water circuit setpoint temperature

2 ... 20 K

Value of hot-water circuit switching differential. Symmetrical effect around the hot-water circuit setpoint

0 ... 60 min 5

90 EN2H-0221GE51 R0808

SDC / DHC Operation

Parameter

12 Circulation pump

Designation Setting range / Setting values Factory

AUTO Active hot-water circuit switching time program

1 P1, direct heating circuit

2 P2, direct heating circuit

3 P3, direct heating circuit

4 P1, mixed heating

5 P2, mixed heating

6 P3, mixed heating

7 P1, mixed heating

8 P2, mixed heating

Setting

setting

AUTO

time program

circuit 1

circuit 2

9 P3, mixed heating

10 P1, hot-water circuit

11 P2, hot-water circuit

12 P3, hot-water circuit

13 Economy interval

pause of circulating pump

14 Economy interval

cycle (period duration)

0 ... setting value of parameter 14

Switch-on interval while the

circulating pump is running

1 ... 60 min 20

1 Normal operation 1 16 Circulating pump

2 Switched off during hot-

circuit 2

water circuit charging

EN2H-0221GE51 R0808 91

Operation SDC / DHC

Parameter

Heating curve

Designation Setting range / Setting values Factory

setting

generator during follow-up time

AUTO Setpoint at heat gen-

erator depending on demand

OFF Heat generator off

AUTO 17 Behaviour of heat

during follow-up time of solar charging pump

5.4.4 "Direct heating circuit" menu (UNMIXED CIRC)

This menu contains all parameters required to program the unmixed heating circuits, except the switching time programs.

Designation Setting range / Setting values Factory

setting

Slope OFF, 0.02 to 3.50 1.5

Setting

duced

Heating system

Reduced operation

Heating system

ECO Switch-off operation ECO Re-

RED Lowering operation

UFH Under floor heating RAD

RAD Radiator

CONV Convector heater

92 EN2H-0221GE51 R0808

SDC / DHC Operation

Parameter

03 Room connection

04 Room factor

Designation Setting range / Setting values Factory

OFF Display of heat (in conjunction with room sensor)

1 Display of room

2 Display of room

3 Display of room

OFF

Setting

setting

OFF generator temperature, room sensor off, operation active

temperature, room sensor active, operation active

temperature, room sensor active, operation disabled

temperature, room sensor off, operation active

OFF

10 ... 500 %

RC Room controller active

07 Heating limit OFF, 0.5 to 40 K OFF

08 Room frost-

protection limit

09 Room thermostat

function

10 Assignment of

outside sensor

5 ... 30°C 10

OFF, 0.5 to 5 K OFF

0 Regulation to average

1 Regulation to outside

2 Regulation to outside

Influence active

0 value (outside sensor 1 + outside sensor 2)

sensor 1

sensor 2

11 Constant

temperature setpoint

EN2H-0221GE51 R0808 93

10 ... 95°C 20

Operation SDC / DHC

Parameter

12 Minimum

13 Maximum

14 Temperature

15 Extended pump

16 Screed function

Designation Setting range / Setting values Factory

10°C to setting value of

temperature limit

increase of heating circuit

over-run

parameter 13

Setting value of parameter 12 to Setting value of parameter 30 in "Heat generator" menu (OEM maximum limit)

–5 ... 20 K Direct

0 ... 60 min 5

OFF OFF

1 Functional heating

2 Screed-drying heating

Setting

setting

heating

circuit = 0

23 Room control

C-factor (SDW 30 only)

24 Room control Tn

(SDW 30 only)

mode

26 Room setpoint

ramp

41 Switch-on

optimisation

42 Min. pre-heat time 0 ... setting value of parameter 43 0,5

43 Max. pre-heat time Setting value of parameter 42 to

1 ... 100 8

5 ... 240 min 35

STBY Standby STBY 25 Holiday operating

RED Lowering operation

OFF, 0.5 to 60 K/h OFF

OFF OFF

1 Adaption off

2 Adaption on

3 Adaption restart

30 h

44 Min. jump back

temperature

45 Without room

sensor

94 EN2H-0221GE51 R0808

0 ... 30°C 5

0 ... 10°C 1

SDC / DHC Operation

Parameter

46 Pre-heat time at

Designation Setting range / Setting values Factory

setting

0 ... 30 h 1

0°C

47 Lowering ramp 0 ... 500 % 100

Heating

Heating circuit name

00000 ... ZZZZZ –

circuit name

5.4.5 "Mixed heating circuit 1 / 2" (MIX.VALVE - 1 / MIX.VALVE - 2) menus

These menus contain all parameters required to program the mixed heating circuit, except the switching time programs.

Parameter

Designation Setting range / Setting values Factory

setting

Setting

Heating curve

duced

Heating system

Slope OFF, 0.02 to 3.50 1

Reduced operation

ECO Switch-off operation ECO Re-

RED Lowering operation

Heating system

UFH Floor heating

RAD

RAD Radiator

CONV Convector heater

EN2H-0221GE51 R0808 95

Operation SDC / DHC

Parameter

03 OFF Display of heat

1 Display of room

2 Display of room

Designation Setting range / Setting values Factory

setting

Room connection (in conjunction with room sensor)

generator temperature, room sensor off, operation active

temperature, room sensor active, operation active

temperature, room sensor active, operation disabled

3 Display of room

temperature, room sensor off, operation active

OFF

Setting

04 Room factor

07 Heating limit OFF, 0.5 to 40 K OFF

08 Room frost-

protection limit

09 Room thermostat

function

10 Assignment of

outside sensor

OFF

10 ... 500 %

RC Room controller active

5 ... 30 °C

OFF, 0.5 to 5 K OFF

0 Regulation to average

1 Regulation to outside

2 Regulation to outside

Influence active

value (outside sensor 1 + outside sensor 2)

sensor 1

sensor 2

OFF

96 EN2H-0221GE51 R0808

SDC / DHC Operation

Parameter

11 Constant tem-

12 Minimum

13 Maximum

14 Temperature

15 Follow-up time of

Designation Setting range / Setting values Factory

perature setpoint (only if output was set to constant regulator)

temperature limit

increase of heating circuit

pump

setting

10 ... 95°C

10°C to setting value of parameter 13

Setting value of parameter 12 to Setting value of parameter 30 in "Heat generator" menu (OEM maximum limit)

–5 ... 20 K Mixed

0 ... 60 min 5

heating circuit = 4

Setting

16 Screed function

17 Return maximum

temperature limit

18* P part XP 1 ... 50 %/K 2

19* Sampling time Ts 1 ... 600 s 20

20* I part Tn 1 ... 600 s 270

21* Actuator runtime 10 ... 600 s 120

position function

OFF OFF

1 Functional heating

2 Screed-drying heating 10 ... 90 °C

1 Continuous control

signal in end position

2 Control signal

suppressed at end position (actuator deenergised)

1 22* Actuator end

23 Room control C-

factor (SDW 30 only)

EN2H-0221GE51 R0808 97

1 ... 100 8

Operation SDC / DHC

Parameter

24 Room control Tn

26 Room setpoint

28 Cooling

39 Spread of hot-

40 Offset valve

Designation Setting range / Setting values Factory

(SDW 30 only)

mode

ramp

temperature of mixed heating circuit

water circuit preregulator

position of hotwater circuit preregulator

Setting

setting

5 ... 240 min 35

STBY Standby STBY 25 Holiday operating

RED Lowering operation

OFF, 0.5 ... 60 K/h OFF

OFF, 18 to 24 OFF

2 ... 20 K 5

0 ... 100 % 0

41 Switch-on op-

timisation

42 Minimum pre-heat

time

43 Maximum pre-heat

time

44 Min. jump back

temperature

45 Without room

sensor

46 Pre-heat time at

0 °C

47 Lowering ramp 0 ... 500 % 100

OFF OFF

1 Adaptation off

2 Adaptation on

3 Adaptation restart

0 ... setting value of parameter 43 0.5

Setting value of parameter 42 to 30 h

0 ... 30 °C 5

0 ... 10 °C 1

0 ... 30 h 1

98 EN2H-0221GE51 R0808

SDC / DHC Operation

Para-

Designation Setting range / Setting values Factory

meter

Heating

Heating circuit

name circuit name

5.4.6 "Heat generator" menu (HEAT GENER.

Para-

Designation Setting range / Setting values Factory meter

01 Design

Setting

setting

00000 ... ZZZZZ –

* OEM

The parameters in this menu refer to the type of the respective heat generator and the associated specific control functions.

Setting

setting

OFF Without heat generator 1

1 Oil/gas - one stage

2 Oil/gas - two stages

3 Oil/gas - 2 x one stage

4 Modulating burner

5 Open Therm

02 Start-up protection

(not if parameter

OFF No start-up protection 1

1 Unlimited start-up

01 = OFF)

2 Start-up protection

3 Start-up protection

03 Minimum tem-

perature limit (not

5°C to setting value of parameter

04 if parameter 01 = OFF)

protection

controlled by weather conditions

disconnected

38 (5 with automatic operation)

04 Maximal

temperature limit (not if parameter

Setting value of parameter 03 to

setting value of parameter 30

(OEM maximum limit)

01 = OFF)

EN2H-0221GE51 R0808 99

Operation SDC / DHC

Parameter

05 Limit mode

06 Sensor operating

07 Minimum burner

Designation Setting range / Setting values Factory

1 Minimum limit based on minimum limit (not if parameter 01 = OFF)

mode

runtime

differential I

2 Limited minimum limit

3 Unlimited minimum limit

1 Burner switch-off in case

2 External burner switch-

3 Burner enable in case of

0 ... 20 min 2

One stage: 2 ... 30 K 6 08 Burner switching

Two stages: 2 ... (setting value of

parameter 09 – 0.5 K)

Setting

setting

request

of defect

off

defect

09 Burner switching

differential II (not if parameter 01 = 2)

10 Connection delay

stage II

relief stage II

12 Storage charge

1–2 stages

(setting value of parameter 08 +

0.5) to 30 K

0 ... 60 min (0 = 10 s) 0

1 Unlimited enable during

2 Time-out during start-up

1 Two-stage hot-water

2 Two-stage hot-water cir-

3 One-stage hot-water

2 11 Boiler start-up

start-up relief

relief

1 circuit charge (with delay of full-load stage)

cuit charge (unlimited)

circuit charge (partial stage only)

100 EN2H-0221GE51 R0808

Honeywell R0808, EN2H-0221GE51 R0808 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual