Honeywell SDC Thermostat User Manual

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Heating Controller SDC  
Remote Heating Controller DHC  
OPERATING INSTRUCTIONS  
EN2H-0220GE51 R0308  
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EN2H-0220GE51 R0308  
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SDC / DHC  
Contents  
Contents  
1
2
Software version............................................................................................................. 7  
Safety instructions.......................................................................................................... 7  
2
.1  
.2  
Intended use ........................................................................................................ 7  
Requirements for start-up .................................................................................... 7  
2
2.2.1 Power supply........................................................................................... 8  
2.2.2 Connection conditions............................................................................. 8  
2.2.3 Cable cross-sections............................................................................... 8  
2.2.4 Maximum cable lengths .......................................................................... 8  
2.2.5 Cable installation..................................................................................... 8  
2.2.6 Grounding and zeroing............................................................................ 9  
2.3  
2.4  
2.5  
Hot-water temperature greater than 60 °C .......................................................... 9  
Connection of accessory parts .......................................................................... 10  
Maintenance and cleaning................................................................................. 10  
3
4
Overview ........................................................................................................................ 11  
Operation ....................................................................................................................... 12  
4.1  
Display and operating elements ........................................................................ 12  
4
.1.1 Display (basic display) .......................................................................... 13  
.1.2 Operating elements............................................................................... 14  
4
4.1.2.1 Input button (press / turn)........................................................ 14  
4.1.2.2 "Daytime room temperature" button........................................ 14  
4.1.2.3 "Night-time room temperature" button..................................... 15  
4.1.2.4 "Daytime hot-water temperature" button................................. 15  
4.1.2.5 "Operating mode" button (basic display)................................. 16  
4.1.2.6 "Switching time programs / Holiday programs" button............ 23  
4.1.2.7 "System information" button.................................................... 26  
4.1.2.8 "Manual mode" / "Emission measurement" button ................. 28  
4.1.2.9 Heating curve .......................................................................... 30  
4.2  
Menu-selection level .......................................................................................... 31  
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Contents  
SDC / DHC  
4
.2.1 "Time - Date" menu............................................................................... 33  
.2.2 "Timeprograms" menu .......................................................................... 34  
4
4.2.2.1 Selection of the control circuit ................................................. 35  
4.2.2.2 Selection of the program ......................................................... 35  
4.2.2.3 Selection of day of the week and cycle................................... 35  
4.2.2.4 Programming switching times and cycle temperatures........... 36  
Block programming............................................................................................................... 44  
4.2.3 "System Parameters" menu.................................................................. 51  
4.2.3.1 Language selection ................................................................. 51  
4.2.3.2 Time program .......................................................................... 52  
4.2.3.3 Operating mode....................................................................... 52  
4.2.3.4 Summer / Heating limit............................................................ 54  
4.2.3.5 Parameter reset....................................................................... 55  
4.2.4 "DHW" menu ......................................................................................... 56  
4
.2.4.1 Night-time hot-water temperature ........................................... 56  
.2.4.2 Legionella protection day ........................................................ 56  
4
4.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed  
Heating Circuit 2" menu ........................................................................ 57  
4
.2.5.1 Reduced operation.................................................................. 57  
.2.5.2 Heating system........................................................................ 58  
4
4.3  
Error messages.................................................................................................. 59  
5
Log.................................................................................................................................. 60  
4
EN2H-0220GE51 R0308  
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SDC / DHC  
Contents  
EN2H-0220GE51 R0308  
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SDC / DHC  
Software version  
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1
2
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.  
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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 low-  
temperature boilers.  
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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  
2
1
.5 mm for all cables carrying 230 V (power supply, burner,  
pumps, actuator).  
2
0
.6 mm for bus cables (recommended type J-Y(St)Y 2 x 0.6)  
2
0
.5 mm 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!  
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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 draw-  
off points (kitchen, bathroom etc.) in the following cases.  
Add sufficient cold water in these cases.  
Automatic anti- When the automatic anti-legionella mechanism is activated, the  
legionella mechanism 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 / In the manual mode / emission measurement operating mode, the  
Emission hot water is heated up to the highest possible boiler temperature,  
measurement 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.  
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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.  
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SDC / DHC  
Overview  
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  
3
3
7
x
x
x
SDC 3-10  
SDC 3-40  
SDC 7-21  
x
1
2
)
)
x
x
x
x
x
x
x
x
7
+
x
x
x
two  
SDC 9-21  
variable  
relays  
1
0
x
x
x
x
x
x
x
x
+
two  
3)  
SDC 12-31  
variable  
relays  
1)  
2)  
3)  
DHC 43-1  
DHC 43-2  
DHC 43-3  
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Operation  
SDC / DHC  
4
Operation  
4.1 Display and operating elements  
5
1
6
2
3
4
7
8
9
11  
10  
1
"Manual mode" / "Emission measurement" button (not on  
district heating controllers)  
2
3
4
5
6
7
8
9
1
1
"Operating modes" button (basic display)  
"Switching time programs" / "Holiday programs" button  
"System information" button  
Display  
Cover clip for service socket  
"Daytime room temperature" button  
"Night-time room temperature" button  
"Daytime hot-water temperature" button  
0 Input button (press / turn)  
1 Operating mode symbols (heating programs)  
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SDC / DHC  
Operation  
4.1.1 Display (basic display)  
1
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5
2
3
4
1
2
3
Day of the week / Date  
Time  
4
5
Operating mode symbols  
Heat generator temperature  
Active operating mode  
The illumination of the display is switched on by pressing any  
button or using the input button îand 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 À, and active frost  
protection is indicated by a snowflake symbol Á.  
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Operation  
SDC / DHC  
4.1.2 Operating elements  
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4.1.2.1 Input button (press / turn)  
By pressing once, you can:  
ð •  
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  
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4.1.2.2 "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 4.2.3.3 Operating mode, pg. 52.  
Setting  
Press ¥button.  
Set flashing room temperature specification to the desired  
value by turning the input button î.  
C
Confirm set value by pressing the ¥button or the input  
button î.  
Alternative: Automatic acceptance of the value after the set  
information time (see 4.1.2.7 "System information" button, pg. 26).  
Factory setting 20 °C  
Setting range 5 ... 30 °C  
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SDC / DHC  
Operation  
4.1.2.3 "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  
4.2.3.3 Operating mode, pg. 52.  
Setting  
Press ¦button.  
Set flashing room temperature specification to the desired  
value by turning the input button î.  
C
Confirm set value by pressing the ¦button or the input  
button î.  
Alternative: Automatic acceptance of the value after the set  
information time (see 4.1.2.7 "System information" button, pg. 26).  
Factory setting 16 °C  
Setting range 5 ... 30 °C  
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4.1.2.4 "Daytime hot-water temperature" button  
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).  
Setting  
Press §button.  
Set flashing hot-water temperature to the desired value by  
turning the input button î.  
C
Confirm set value by pressing the §button or the input  
button î.  
Alternative: Automatic acceptance of the value after the set  
information time (see 4.1.2.7 "System information" button, pg. 26).  
Factory setting 50 °C  
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Operation  
SDC / DHC  
Setting range 5 °C (hot-water economy temperature) ... Maximum hot-water  
heater temperature limit (service setting)  
One-time hot-water  
circuit loading  
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.  
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.1.2.5 "Operating mode" button (basic display)  
Sets the operating mode and returns to the basic display from  
every operating level.  
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SDC / DHC  
Operation  
Overview of the operating modes  
Operating mode Display  
Symbol  
Setting  
ABSENT  
P1 (P2, P3)*, return  
date  
ç
PARTY  
P1 (P2, P3)*,  
party end time  
è
é
AUTOMATIC  
SUMMER  
HEATING  
RED. HEATING  
STANDBY  
P1 (P2, P3)*  
P1(P2, P3)*  
C
C
C
C
C
ê
ë
ì
í
*
P2 and P3 only after enabling, see "System Parameters"  
menu, parameter 2 = P1 to P3  
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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 4.2.3.3 Operating mode, pg. 52.  
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  
desired value by turning the input button îand confirm with  
the  
button or the input button î.  
Alternative: Automatic acceptance of the value after the set  
information time (see 4.1.2.7 "System information" button, pg. 26).  
Return to the basic  
display  
Press the  
button for approx. 3 s to return to the basic display  
from any operating level.  
NOTE Holiday mode is set via the "Switching time programs / Holiday  
programs" button (see 4.1.2.6 "Switching time programs / Holiday  
programs" button, pg. 23).  
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.1.2.5.1 Absence mode (short-term program)  
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 See 4.1.2.5 "Operating mode" button (basic display) , pg. 16  
Application Short absence while heating operation is active.  
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SDC / DHC  
Operation  
Cancellation An active absence program can be cancelled in case of early  
return.  
Press  
button.  
Turn input button îand switch to automatic operation.  
The active absence program has been cancelled.  
Factory setting P1 as from activation  
Setting range 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.  
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4.1.2.5.2 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 See 4.1.2.5 "Operating mode" button (basic display) , pg. 16  
Application One-time extension of heating operation or intermediate heating  
during lowering operation outside the schedule.  
Cancellation An active party program can be cancelled early.  
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Operation  
SDC / DHC  
Press  
button.  
Turn input button îand switch to automatic mode.  
The active party program has been cancelled.  
Factory setting P1 as from activation  
Setting range 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.  
Display An active party program appears in the basic display with  
information on the party end time.  
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4.1.2.5.3 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 4.2.2 "Timeprograms"  
menu, pg. 34).  
C
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 4.1.2.5 "Operating mode" button (basic display) , pg. 16  
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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 4.2.2 "Timeprograms" menu, pg. 34 and  
C
4.2.3.2 Time program, pg. 52).  
Enabling  
System Parameters" menu, program parameter = P1 to P3 (see  
.2.2 "Timeprograms" menu, pg. 34 and 4.2.3.2 Time program,  
pg. 52).  
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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,Ãor Ä, is also  
displayed depending on the selected program. The symbols are  
only displayed with the time program P1 to P3 active.  
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4.1.2.5.4 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  
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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 4.1.2.5 "Operating mode" button (basic display) , pg. 16  
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 4.2.2.1 Selection of the control circuit, pg. 35  
and 4.2.3.2 Time program, pg. 52).  
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Operation  
SDC / DHC  
Enabling  
System Parameters" menu, program parameter = P1 to P3 (see  
.2.2.1 Selection of the control circuit, pg. 35 and 4.2.3.2 Time  
program, pg. 52).  
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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, Ãor Ä, is also  
displayed depending on the selected program. The symbols are  
only displayed with the time program P1 to P3 active.  
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4.1.2.5.5 Continuous heating operation  
The HEATING operating mode ensures continuous heating  
operation without time limitations based on the specified daytime  
C
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.  
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4.1.2.5.6 Continuous lowering operation  
The RED. HEATING operating mode causes continuously  
reduced heating operation based on the specified lowered room  
C
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).  
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SDC / DHC  
Operation  
NOTE The RED. HEATING operating mode remains active until another  
operating mode is activated.  
Display Activated continuous lowering operation appears in the basic  
display with the information RED. HEATING.  
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4.1.2.5.7 Standby mode  
In standby mode, the entire system is switched off and protected  
from frost (all frost-protection functions active).  
C
Hot-water production is disabled and protected from frost. At  
storage temperatures below 5 °C, a reload to up to 8 °C takes  
place.  
Application Total deactivation of heating and hot water with full building  
protection.  
NOTE 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.  
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4.1.2.6 "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 4.1.2.6.1 Holiday mode, pg. 24 and 4.2.2 "Timeprograms"  
menu, pg. 34.  
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Operation  
SDC / DHC  
4.1.2.6.1 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 îto the left.  
HOLIDAY appears in the display.  
Press input button î.  
HOLIDAY 01 appears in the display.  
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).  
Application Longer absence while heating operation is active.  
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SDC / DHC  
Operation  
Control during At outside temperatures below the frost-protection limit (see  
holidays 4.2.3 "System Parameters" menu, pg. 51) 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).  
Cancellation An active holiday program can be cancelled in case of early  
return.  
Press  
button.  
Turn input button îand switch to automatic mode.  
The active holiday program has been cancelled.  
Factory setting Current date  
Setting range Current date... (current date + 250 days)  
Display An active holiday program appears in the basic display with  
information on the return date.  
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EN2H-0220GE51 R0308  
25  
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Operation  
SDC / DHC  
4.1.2.7 "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 îcauses the  
system temperatures and the counter and consumption states  
and operating states of the connected system components to  
appear. Pressing the input button îcauses the respective  
setpoint values to appear.  
Exceptions Collector flow temperature: No setpoint  
Solar tank temperature:  
Outside temperature:  
No setpoint  
Averaged value  
NOTE The displayed information (see the following example) is  
independent of the installed or enabled system components and  
control circuits.  
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SDC / DHC  
Operation  
Operating overview  
Press  
button  
Turn input button to the left  
Turn input button to the right  
Average/current outside  
temperature value  
Program/operating mode  
Outside temperature  
direct heating circuit/pump status  
min. to max. (0:00 to 24:00 hours)  
Program/operating mode  
mixed heating circuit 1/pump status  
Heat generator temperature  
setpoint/actual value  
Actuator of  
mixed heating circuit 1/status  
Hot-water temperature  
setpoint/actual value  
Program/operating mode  
Flow temperature  
mixed heating circuit 2/pump status  
setpoint/actual value  
Actuator of  
mixed heating circuit 2/status  
Flow temp of mixed heating circuit 1  
setpoint/actual value  
Program/operating mode  
hot-water circuit/pump status  
Flow temp of mixed heating circuit 2  
setpoint/actual value  
Heat generator  
status  
Variable input 1  
setpoint/actual value  
Direct heating circuit  
pump function/status  
Variable input 2  
setpoint/actual value  
Variable output 1  
Variable input 2  
function/operating state  
setpoint/actual value  
Variable output 2  
function/operating state  
Operating hours  
Activations of heat generator  
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Operation  
SDC / DHC  
Setting time for  
automatic return  
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.  
Setting range 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).  
Factory setting OFF  
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4.1.2.8 "Manual mode" / "Emission measurement" button  
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4.1.2.8.1 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 îaccording 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.  
C
C
Application Controller malfunctions (emergency operation), errors  
NOTE The maximum heat generator temperature limit is paramount to  
the heat generator switching differential and stops the heat  
generator in case of exceedance.  
With control devices operated purely as a heating circuit  
expansion, the setting of the temperature has no effect.  
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SDC / DHC  
Operation  
The last value to which the control device adjusted the heat  
generator temperature appears as a recommendation.  
Cancellation  
Press  
button or  
button, to return to the last selected  
operating mode.  
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4.1.2.8.2 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.  
ATTENTION  
There is a danger of scalding by hot water, as the hot-water  
temperature can exceed the set setpoint temperature.  
Application Emission measurement by the chimney sweep.  
Cancellation  
Emission measurement can be cancelled at any time with the  
or button.  
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Operation  
SDC / DHC  
4.1.2.9 Heating curve  
Determines the heating curve for the heating circuits.  
The heating curve describes the relationship of the flow  
C
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 îfor 3 s.  
Turn the input button îto 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 right-  
hand 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 4.1.2.7 "System information" button, pg. 26).  
Press  
button to return to the basic display.  
Setting range 0,2 ... 3,5  
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SDC / DHC  
Operation  
Factory setting Direct heating circuit (HC) = 1,5  
Mixed heating circuit 1  
MC-1)  
Mixed heating circuit 2  
(
=
=
1
1
(
MC-2)  
x
y
a
x
y
a
Boiler / flow temperature [°C]  
Outside temperature [°C]  
T
room [°C]  
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4
.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 îfor approx. 3 s.  
The menu selection always begins with the TIME – DATE  
menu.  
Turn input button îto select additional menus.  
Press input button îto confirm the selected menu.  
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Operation  
SDC / DHC  
The menu functions are described in the following:  
Program-  
ming  
Configuration Configuration  
0
0
1
2
Time  
Year  
Language  
selection  
Nighttime  
hot water  
Heating  
curve  
Heating  
curve  
Heating  
curve  
Time program Legionella- Reduced Reduced Reduced  
protection  
day  
0
0
3
4
Day -  
Operating  
mode  
Heating  
system  
Heating  
system  
Heating  
system  
Month  
Change  
Summer /  
Heat limit  
05  
06  
07  
23  
Parameter  
reset  
Heating  
circuit  
name  
Heating  
circuit  
name  
Heating  
circuit  
name  
Heating  
circuit  
name  
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SDC / DHC  
Operation  
4.2.1 "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 Corrections for rare fault cases  
Access See 4.2 Menu-selection level, pg. 31  
Setting  
Turn input button îand select the "Time - Date" menu.  
Turn input button îand select the desired calendar value  
(
time, year, day - month, change).  
Press input button îand change the corresponding value by  
turning the input button î.  
Press input button îto confirm the set value.  
Turn input button îto select and change additional calendar  
values.  
Returning  
Returning to the basic display takes place by pressing the  
button or automatically after the set information time (see  
4.1.2.7 "System information" button, pg. 26).  
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Operation  
SDC / DHC  
4.2.2 "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 5 Log, pg. 60).  
Access  
Press  
button.  
Returning  
Returning to the basic display takes place by pressing the  
button or automatically after the set information time (see  
4.1.2.7 "System information" button, pg. 26).  
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SDC / DHC  
Operation  
4.2.2.1 Selection of the control circuit  
After accessing the "Timeprograms" menu, the desired control  
circuits can be selected with the input button îin 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 îto access the selected circuit.  
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4
.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).  
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4.2.2.3 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 îand  
confirmed by pressing the input button î.  
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Operation  
SDC / DHC  
4.2.2.4 Programming switching times and cycle temperatures  
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4.2.2.4.1 Switch-on time  
The switch-on time is the start of heating or, with enabled switch-  
on 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 î.  
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4.2.2.4.2 Switch-off time  
The switch-off time is the end of heating or, with enabled switch-  
off 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.  
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SDC / DHC  
Operation  
NOTE 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.  
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4
.2.2.4.3 Cycle temperature  
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 hot-  
water 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.  
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Operation  
SDC / DHC  
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 4.2 Menu-selection level, pg. 31).  
Select  
heating circuit:  
Default  
time  
Copy  
circuit  
HC  
MC -1  
MC -2  
DHW  
We  
Th  
Fr  
Select day  
and cycle:  
Mo-  
Hcy-1  
Mo-  
Hcy-2  
Mo-  
Hcy-3  
Tu-  
Hcy-1  
Su-  
Hcy-3  
Copy  
day  
Sa  
Change:  
Change:  
Start of  
heating  
Only appears if there are switching  
times in the second heating cycle.  
End of  
heating  
Monitoring  
Return:  
3
s
Change:  
Temperature  
Return to the basic display:  
HC  
Direct heating circuit  
MC-1  
MC-2  
DHW  
Hcy  
Mixed heating circuit 1  
Mixed heating circuit 2  
Hot-water heating circuit  
Heating cycle  
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SDC / DHC  
Operation  
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 circuit  
Day  
Heating operation  
from  
6:00  
to  
Heat generator heating  
circuit  
Mo to Su  
Mo to Su  
22:00  
Hot-water circuit  
5:00  
6:00  
22:00  
22:00  
Mixed heating circuit 1 / 2 Mo to Su  
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Operation  
SDC / DHC  
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 4.2 Menu-selection level,  
pg. 31).  
Select  
heating circuit:  
Default  
time  
Copy  
circuit  
HC  
P1  
MC -1  
P2  
MC -2  
P3  
DHW  
Select  
program:  
We  
Th  
Fr  
Select day  
and cycle:  
Mo-  
Hcy-1  
Mo-  
Hcy-2  
Mo-  
Hcy-3  
Tu-  
Hcy-1  
Su-  
Hcy-3  
Copy day  
Sa  
Change:  
Change:  
Start of  
heating  
Only appears if there are switching  
times in the second heating cycle  
End of  
heating  
Monitoring  
Return:  
3
s
Change:  
Temperature  
Return to the basic display:  
HC  
Direct heating circuit  
MC-1  
MC-2  
DHW  
Hcy  
Mixed heating circuit 1  
Mixed heating circuit 2  
Hot-water heating circuit  
Heating cycle  
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SDC / DHC  
Operation  
Default program P1  
Heating circuit  
Day  
Heating operation  
from  
6:00  
to  
Heat generator heat- Mo to Su  
ing circuit  
22:00  
Hot-water circuit  
Mo to Su  
Mo to Su  
5:00  
6:00  
22:00  
22:00  
Mixed heating  
circuit 1 / 2  
Default program P2  
Heating circuit  
Day  
Heating operation  
from  
6:00  
6:00  
6:00  
5:00  
5:00  
6:00  
6:00  
6:00  
7:00  
to  
from to  
Mo to Th  
8:00  
8:00  
22:00  
8:00  
8:00  
23:00  
8:00  
8:00  
23:00  
16:00 22:00  
13:00 22:00  
Boiler heating circuit Fr  
Sa to Su  
Mo to Th  
Fr  
15:30 22:00  
12:30 22:00  
Hot-water circuit  
Sa to Su  
Mo to Th  
Fr  
16:00 22:00  
13:00 22:00  
Mixed heating  
circuit 1 / 2  
Sa to Su  
Default program P3  
Heating circuit  
Day  
Heating operation  
from  
to  
Heat generator heat- Mo to Fr  
7:00  
18:00  
ing circuit  
Sa to Su  
Reduced  
6:00  
Hot-water circuit  
Mo to Su  
Sa to Su  
Mo to Su  
Sa to Su  
18:00  
18:00  
Reduced  
7:00  
Mixed heating  
circuit 1 / 2  
Reduced  
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Operation  
SDC / DHC  
4
.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
2
3
4
– To any days within the week (Mo, Tu, We, ..., Su)  
– To all weekdays (Mo to Fr)  
– To the weekend (Sa to Su)  
– To the entire week (Mo to Su)  
Calling up the copy function (days)  
See flowcharts on pg. 44  
Source day  
Press input button îto confirm the copy function.  
Turn input button îto 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.  
Target day  
Press input button îto confirm the source day.  
The source day appears flashing.  
Turn input button îto 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 îand can be skipped and accepted if necessary.  
Pressing the  
display.  
button causes an immediate return to the basic  
NOTE Only complete days with all cycles and temperature specifications  
and the respective program can be copied.  
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Operation  
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4.2.2.4.3.2 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. 44  
Source circuit  
Press input button îto confirm the copy function.  
Turn input button îto 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.  
Acceptance is confirmed by acknowledging COPY OK. The copy  
function is then called up again to copy additional circuits, if  
necessary.  
NOTE Heating circuits cannot be copied to hot-water circuits or the re-  
verse due to the different temperature specifications. If a heating  
circuit (HC, MC-1, MC-2) is selected as the source circuit, the hot-  
water 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  
display.  
button causes an immediate return to the basic  
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Operation  
SDC / DHC  
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.  
ö
Select  
heating circuit:  
Default  
time  
Copy  
circuit  
HC  
MC -1  
P2  
MC -2  
P3  
DHW  
ö
î
Select program:  
1)  
P1  
ö
î
We  
Th  
Fr  
Select  
copy function:  
Mo  
Hcy-1  
Mo  
Hcy-2  
Mo  
Hcy-3  
Tu  
Hcy-1  
Su  
Hcy-3  
Copy day  
Sa  
HC  
Direct heating circuit  
MC-1  
MC-2  
DHW  
Mixed heating circuit 1  
Mixed heating circuit 2  
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.  
44  
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SDC / DHC  
Operation  
Copy day  
Select  
source day:  
Example: Monday  
Copy  
from  
Mo  
Mo ... Su  
Source day  
Select  
first target day:  
Example: Tuesday  
Copy Mo  
to  
Tu  
1
1
1
6
target day or  
-7 (Mo ... Su) or  
-5 (Mo ... Fr) or  
-7 (Sa ... Su)  
Copy source day  
to first target day:  
Acknowledge:  
Copy  
day  
OK  
Tuesday as with Monday  
Source day  
Select  
second target day:  
Example: Wednesday  
Copy Mo  
to  
We  
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:  
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Operation  
SDC / DHC  
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Copying heating circuits  
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 hot-  
water circuit are copied among one another if they were enabled  
in the "System Parameter" menu.  
Select  
copy function:  
Default  
time  
Copy  
circuit  
HC  
MC-1  
MC-2  
DHW  
Select  
source circuit:  
Source circuit Source circuit Source circuit  
HC  
MC -1  
MC -2  
Select  
source circuit  
program:  
Source circuit Source circuit Source circuit  
1
P3  
)
HC  
P1 MC -1  
P2 MC -2  
Select  
target circuit:  
Target circuit  
HC  
Target circuit  
MC -1  
Target circuit  
MC -2  
Select  
target circuit  
program:  
Target circuit  
Target circuit Target circuit  
1)  
MC -2  
P1 MC -2 P2 MC -2 P3  
Copy:  
Acknowledge:  
Copy  
Program P1 (direct heating circuit) =  
-
OK- Program P2 (mixed heating circuit 2)  
Copy additional heating circuits  
if necessary  
Exit:  
Basic display  
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SDC / DHC  
Operation  
HC  
Direct heating circuit  
Mixed heating circuit 1  
Mixed heating circuit 2  
Hot-water heating circuit  
MC-1  
MC-2  
DHW  
1)  
Program selection for source and target circuits are  
skipped if programs P2 and P3 are disabled in the  
"
System Parameter" menu.  
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4.2.2.4.4 Reloading default programs  
See flowchart on pg. 49  
Individually created switching time program P1, P2 or P3 can be  
overwritten with the original default switching time program P1, P2  
or P3.  
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 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.  
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Operation  
SDC / DHC  
ATTENTION  
With the setting value ALL, all heating circuits and the hot-  
water 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  
display.  
button causes an immediate return to the basic  
48  
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SDC / DHC  
Operation  
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  
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Operation  
SDC / DHC  
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  
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SDC / DHC  
Operation  
4.2.3 "System Parameters" menu  
The system parameters refer to general limiting parameters and  
specification values within the heating system.  
Access See 4.2 Menu-selection level, pg. 31  
Returning  
Returning to the basic display takes place by pressing the  
button or automatically after the set information time (see  
4.1.2.7 "System information" button, pg. 26).  
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4.2.3.1 Language selection  
Several languages can be selected for all information that  
appears in the display.  
After selecting the language and confirming it by pressing the  
input button î, additional communication takes place in the  
respective language.  
Setting values DE  
German  
English  
GB  
FR  
IT  
French  
Italian  
NL  
ES  
PT  
HU  
CZ  
PL  
RO  
RU  
TR  
S
Dutch  
Spanish  
Portuguese  
Hungarian  
Czech  
Polish  
Romanian  
Russian  
Turkish  
Swedish  
Norwegian  
N
Factory setting German  
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Operation  
SDC / DHC  
4
.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  
All three programs enabled  
P1  
to P3  
Factory setting P1  
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.  
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4.2.3.3 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 1, 2  
Set values  
1
2
The selected setting applies for all heating circuits together.  
Each heating circuit can be assigned an individualised set-  
ting.  
Factory setting  
1
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SDC / DHC  
Operation  
4
.2.3.3.1 Individualised daytime room temperature for each heating  
circuit  
Setting  
Press ¥button.  
Select desired heating circuit (HC, MC-1 or MC-2) by turning  
the input button î.  
C
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 4.1.2.7 "System information" button, pg. 26).  
Setting range 5 ... 30 °C  
Factory setting 20 °C  
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4.2.3.3.2 Individualised night-time room temperature for each heating  
circuit  
Setting  
Press ¦button.  
Select desired heating circuit (HC, MC-1 or MC-2) by turning  
the input button î.  
C
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 4.1.2.7 "System information" button, pg. 26).  
Setting range 5 ... 30 °C  
Factory setting 16 °C  
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Operation  
SDC / DHC  
4.2.3.3.3 Individualised operating mode for each heating circuit  
Each heating circuit can be assigned an individualised operating  
mode.  
Setting  
Press  
button.  
Select desired heating circuit (HC, MC-1 or MC-2) by turning  
the input button î.  
C
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 îand confirm  
set value by pressing the input button î.  
Alternative: Automatic acceptance of the value after the set  
information time (see 4.1.2.7 "System information" button, pg. 26).  
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4.2.3.4 Summer / Heating limit  
This parameter specifies the end of heating operation depending  
on the outside temperature based on the following criteria:  
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.  
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SDC / DHC  
Operation  
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:  
In case of an outside sensor defect  
In case frost protection is active  
NOTE 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.  
Factory setting 20 °C  
Setting range OFF, set value of system frost protection to 40 °C  
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4
.2.3.5 Parameter reset  
With the reset parameter, it is possible to reset any inadvertently  
made changes in the parameter menu to the factory setting.  
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 îfor 5 s.  
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Operation  
SDC / DHC  
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.  
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4.2.4 "DHW" menu  
This menu contains all parameters required to program the hot-  
water circuit, except the hot-water switching time programs.  
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4.2.4.1 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 40 °C  
Setting range 5 °C to set normal hot-water temperature value  
NOTE If a hot-water thermostat (see parameter 05 = transducer for hot-  
water circuit) is used to detect the hot-water temperature, this  
parameter is skipped.  
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4.2.4.2 Legionella protection day  
Factory setting OFF  
Setting range OFF, MO to SU, ALL  
Set values OFF  
MO to SU  
The legionella protection function is not active.  
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.  
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SDC / DHC  
Operation  
NOTE If a hot-water thermostat (see 05 parameter = transducer for hot-  
water circuit) is used to detect the hot-water temperature, these  
parameters are skipped.  
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4.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed  
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.  
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4.2.5.1 Reduced operation  
During reduced operation, you can select between two operating  
modes.  
Factory setting ECO  
Setting range ECO, RED  
Set values RED (lowering operation)  
The heating circuit pump of the direct heating circuit continues  
functioning during reduced operation (see 4.2.3.2 Time program,  
pg. 52). 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.  
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Operation  
SDC / DHC  
ECO (switch-off operation)  
During reduced operation, the direct heating circuit is switched off  
completely with outside temperatures above the set frost-  
protection 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.  
Application Building with high insulation values (full heating protection).  
NOTE The mode set here also applies for the ABSENT and RED.  
HEATING operating modes.  
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4.2.5.2 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:  
1
1
2
,1  
Slightly progressive heating curves for floor or other  
area heating.  
,3  
Progressive standard heating curves for all radiator  
heating with m-values between 1.25 and 1.35.  
Progressive heating curves for convector and  
baseboard heating.  
>3  
Heavily progressive heating curves for general ventilator  
applications with high starting temperatures.  
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SDC / DHC  
Operation  
Factory setting 1,3  
,1  
(radiator systems)  
1
(floor heating) with mixed heating circuits  
Setting range 1 ... 10  
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4
.3 Error messages  
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 error Sensor measured values that do not lie in the measurement  
messages 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.  
Heat generator error These error messages evaluate the respective switching status.  
messages They appear depending on the type and allocation with fault code  
30 to 40 and index 0, 1 or 2.  
Logical error These error messages evaluate the control result to be expected.  
messages 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.  
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Log  
SDC / DHC  
5
Log  
Weekly switching program  
Set by:  
Object:  
Mon  
1)  
On:  
Cont. circuit  
(
Time  
Setpoint  
Opt.  
Tue  
2)  
Cont. circuit  
Time  
(
Setpoint  
Opt.  
Wed  
3)  
Cont. circuit  
Time  
(
Setpoint  
Opt.  
Thu  
4)  
Cont. circuit  
Time  
(
Setpoint  
Opt.  
Fri (5) Cont. circuit  
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Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies  
Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:  
Automation and Control Solutions  
Honeywell House  
Arlington Business Park  
Bracknell, Berks, RG12 1EB  
Phone(44) 1344 656000  
Fax (44) 1344 656644  
Printed in Germany  
All rights reserved. Subject to change without notice.  
EN2H-0220GE51 R0308  
Art. 045 130 5546 – 0812 – 30  

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