Honeywell SDC Remote Thermostat
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.
Safety instructions
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.
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. The current time and date are already set at the factory and are backed up by a battery. The time switch functions are based on a basic program and the control functions are preset for common heating systems with low-temperature boiled
Power supply
Do not disconnect the controller from the main supply! The battery for saving all individualized data is otherwise unnecessarily strained. The frost-protection function of the controller is deactivated.
Connection conditions
All electrical connection work may only be carried out by qualified personnel!
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.
Maximum cable lengths
Sensor, selector and analog inputs We recommend using cables no longer than 200 m. Longer connection lines could be used, bu 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).
Cable installation
Install cables for sensors apart from the cables carrying 230 V! Branch boxes in the sensor cable must be avoided!
Grounding and zeroing
Local regulations on the connection of equipment must be observed!
Hot-water temperatures 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 antilegionella 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.
Connection of accessory parts
WARNING
According to VDE 0730, a separator for each main 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.
Maintenance and cleaning
The controller is maintenance-free. The device can be cleaned externally with a moist (not wet) cloth.
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 |
Number of output relays |
Burner stage 2 or
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 | Variable output 1 |
| SDC 3-10 | 3 | – | x | x | – | – | x | – | |
| SDC 3-40 | 3 | – | – | – | x | – | – | – | – |
| SDC 7-21 1) | 7 | – | x | x | x | – | x | – | – |
|
SDC 9-21 2) |
7
+ two variable relays |
x | x | x | x | – | x | x | x |
|
SDC 12-31 3) |
10
+ two variable relays |
x | x | x | x | x | x | x | x |
DHC 43-1
- DHC 43-2
- DHC 43-3
Operation
Display and operating elements
- Manual mode” / “Emission measurement” button (not on district heating controllers)
- “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
- Input button (press/turn)
- Operating mode symbols (heating programs)
Display (basic display)
- Day of the week / Date
- Operating mode symbols
- Time
- Heat generator temperature
- 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 the 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, and active frost protection is indicated by a snowflake symbol 
Operating elements
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 you can:
- Change values (clockwise increases called-up values, anticlockwise decreases them)
- Navigate through the menus
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 to the respective heating circuit. To set the operating mode, see 4.2.3.3 Operating mode, pg. 52.
Setting
- Press the button.
- Set the flashing room temperature specification to the desired value by turning the input button.
- Confirm the set value by pressing the button or the input button .
- Alternative: Automatic acceptance of the value after the set information time (see 4.1.2.7 “System information” button, pg. 26).
- 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
“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 to 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 .
- confirm the set value by pressing the button or the input
button - 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
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 to hot-water operation (manual summer operation).
Setting
- Press button.
- Set the flashing hot-water temperature to the desired value by turning the input button
- Confirm the set value by pressing the button or the input button
- 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
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’s program is superimposed here
Operating mode” button (basic display)
Sets the operating mode and returns to the basic display from every operating level.
Overview of the operating modes
P2 and P3 only after enabling, see “System Parameters” menu, parameter 2 = P1 to P3 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 the operating mode by turning the input button The marking is located above the corresponding operating mode symbol.
- Confirm set operating mode by pressing the button or the input button
- With short-term operating modes (ABSENT, PARTY), set the desired value by turning the input button and confirming with the button or the input button
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).
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 the heating operation is active.
Cancellation
An active absence program can be canceled in case of an early return.
- Press the button.
- Turn the input button and switch to automatic operation. The active absence program has been canceled
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.
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 operations outside the schedule.
Cancellation An active party program can be canceled early.
- Press button.
- Turn the input button and switch to automatic mode. The active party program has been canceled
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.
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).
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
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 4.2.3.2 Time program, pg. 52).
Enabling
“System Parameters” menu, program parameter = P1 to P3 (see 4.2.2 “Timeprograms” menu, pg. 34 and 4.2.3.2 Time program, pg. 52).
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.
Manual summer operation (excluding heating operation)
With manual summer operation, only the hot-water circuit remains in operation and controls the heat generator temperature based on the specified hot-water temperature and the specified hot-water switching time program. The heating operation is stopped, and protection from frost is provided. This feature is only available when the 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)
Enabling
“System Parameters” menu, program parameter = P1 to P3 (see 4.2.2.1 Selection of the control circuit, pg. 35 and 4.2.3.2 Time program, pg. 52).
Display
Manual summer operation appears in the basic display with the information SUMMER. If default programs P2 and P3 were enabled, the corresponding symbol, 
, or 
, is also displayed depending on the selected program. The symbols are only displayed with the time program P1 to P3 active
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.
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 parameters = 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).
NOTE The RED. The 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.
Standby mode
In standby mode, the entire system is switched off and protected from frost (all frost-protection functions are 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.
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.
Switching time programs / Holiday programs” button
Using this button, you can create individualized 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.
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
HOLIDAY 01 appears in the display. - Press input button
The year flashes in the display. - Set year with the input button
- Press input button
The day on which the holiday is to begin flashes in the display. - Set the day the holiday will begin with the input button
- Press input button
TIL – – appears in the display. - Set the day you will return from holiday with the input button
- Press input button
The desired holiday timeframe is saved. - You can now enter additional holiday timeframes (up to 15-holiday blocks
Application Longer absence while a heating operation is active.
Control during holidays
- At outside temperatures below the frost-protection limit (see 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 canceled in case of an early return.
- Press the button.
- Turn the input button and switch to automatic mode. The active holiday program has been canceled.
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.
The “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 causes the system temperatures and the counter and consumption states and the operating states of the connected system components to appear. Pressing the input button causes the respective setpoint values to appear.
Exceptions
- Collector flow temperature: No setpoint
- Solar tank temperature: No setpoint
- Outside temperature: Averaged value
NOTE
The displayed information (see the following example) is independent of the installed or enabled system components and control circuits
Operating overview
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 an 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
Manual mode” / “Emission measurement” button
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 buttons 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
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.The last value to which the control device adjusted the heat generator temperature appears as a recommendation.
Cancellation
Press the button or button, to return to the last selected operating mode.
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 canceled at any time with the button
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 the input button for 3 s.
- Turn the input button to select the desired heating circuit (HC, MC-1, or MC-2) and confirm it by pressing the input button The design temperature (system) appears at the bottom right-hand side of the display.
- Press the input button
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
Alternative: Automatic acceptance of the value after the set information time (see 4.1.2.7 “System information” button, pg. 26). - Press the button to return to the basic display.
Setting range 0,2 … 3,5
Factory setting
- Direct heating circuit (HC) = 1,5
- Mixed heating circuit 1
- (MC-1) =1
- Mixed heating circuit 2 (MC-2) = 1
- x Boiler/flow temperature [°C]
- y Outside temperature [°C]
- a Troom [°C]
Menu-selection level
The control device contains a menu selection level that is structured differently, depending on the respective device version.
Access
The control device contains a menu selection level that is structured differently, depending on the respective device version.
- Press and hold the input button for approx. 3 s. The menu selection always begins with the TIME – DATE menu.
- Turn the input button to select additional menus.
- Press the input button to confirm the selected menu.
The menu functions are described in the following
| Program- ming | Configuration | Configuration | ||||
| Parameter | Time – Date | System parameter | Hot water | Direct heating circuit | Mixed heating circuit 1 | Mixed heating circuit 2 |
| 01 | Time | Language selection | Nighttime hot water | Heating curve | Heating curve | Heating curve |
| 02 | Year | Time program | Legionella- protection
day |
Reduced | Reduced | Reduced |
| 03 | Day – Month | Operating mode | – | Heating system | Heating system | Heating system |
| 04 | Change | Summer / Heat limit | – | – | – | – |
| 05 | – | – | – | – | – | – |
| 06 | – | – | – | – | – | – |
| 07 | – | – | – | – | – | – |
| 23 | – | Parameter reset | – | – | – | – |
| Heating circuit name | – | – | – | Heating circuit name | Heating circuit name | Heating circuit name |
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 buttonand select the “Time – Date” menu.
-
Turn input button and select the desired calendar value (time, year, day – month, change).
-
Press input buttonand change the corresponding value by turning the input button î.
-
Press input button to confirm the set value.
-
Turn input button to 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).
“Timeprograms” menu
Individualized 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 individualized 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. Individualized programs, however, are deleted when default programs are reloaded and must be recreated. For this reason, individualized 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).
Selection of the control circuit
After accessing the “Timeprograms” menu, the desired control circuits can be selected with the input button 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 the input button to access the selected circuit
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, the program selection is automatically skipped (see “System Parameters” menu, program parameter = P1).
Selection of the 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 and confirmed by pressing the input button
Programming switching times and cycle temperatures
Switch-on time
The switch-on time is the start of heating or, with enabled switch-on optimization, the start of the 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 on the 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 the 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
Cycle temperature
Once the switch-off time is accepted, the associated cycle temperature appears flashing and can be changed immediately with the input button 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 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: of switch-on time, switch-off time, and cycle temperature.
Switching time programming (programs P2 and P3 disabled)
Upon accessing the menu selection level, the “Timeprograms” menu always appears first. Enabling programs P2 and P3 in the “System Parameters” menu (see 4.2 Menu-selection level, pg. 31).
- HC Direct heating circuit
- MC-1 Mixed heating circuit 1
- MC-2 Mixed heating circuit 2
- DHW Hot-water heating circuit
- Hcy Heating cycle
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 to |
| Heat generator heating circuit | Mo to Su | 6:00 22:00 |
| Hot-water circuit | Mo to Su | 5:00 22:00 |
| Mixed heating circuit 1 / 2 | Mo to Su | 6:00 22:00 |
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).
- HC Direct heating circuit
- MC-1 Mixed heating circuit 1
- MC-2 Mixed heating circuit 2
- DHW Hot-water heating circuit
- Hcy Heating cycle
| Default program P1 | ||
| Heating circuit | Day | Heating operation
from to |
| Heat generator heat- ing circuit | Mo to Su | 6:00 22:00 |
| Hot-water circuit | Mo to Su | 5:00 22:00 |
| Mixed heating circuit 1 / 2 | Mo to Su | 6:00 22:00 |
| Default program P2 | ||
| Heating circuit | Day | Heating operation |
| from to from to | ||
|
Boiler heating circuit |
Mo to Th | 6:00 8:00 16:00 22:00 |
| Fr | 6:00 8:00 13:00 22:00 | |
| Sa to Su | 6:00 22:00 | |
|
Hot-water circuit |
Mo to Th | 5:00 8:00 15:30 22:00 |
| Fr | 5:00 8:00 12:30 22:00 | |
| Sa to Su | 6:00 23:00 | |
|
Mixed heating 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 | |
| Default program P3 | |||
| Heating circuit | Day | Heating operation
from to |
|
| Heat generator heat- ing circuit | Mo to Fr | 7:00 | 18:00 |
| Sa to Su | Reduced | ||
| Hot-water circuit | Mo to Su | 6:00 | 18:00 |
| Sa to Su | Reduced | ||
| Mixed heating circuit 1 / 2 | Mo to Su | 7:00 | 18:00 |
| Sa to Su | Reduced | ||
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. 44
Source day
- Press input button to confirm the copy function.
- Turn input button 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.
Target day
- Press the input button to confirm the source day.
- The source day appears flashing.
- Turn the input button to select the following setting values and confirm by pressing the input button
- The following target days (Mo to Su) individually
- All days of the week (1 to 7) as a weekly 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 the acknowledgment, 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.
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 to confirm the copy function.
- Turn input button 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.
NOTE
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 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 button causes an immediate return to the basic display.
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
- HC Direct heating circuit
- MC-1 Mixed heating circuit 1
- MC-2 Mixed heating circuit 2
- DHW Hot-water heating circuit
- Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the “System Parameter” menu
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.
- HC Direct heating circuit
- MC-1 Mixed heating circuit 1
- MC-2 Mixed heating circuit 2
- DHW Hot-water heating circuit Program selection for source and target circuits are skipped if programs P2 and P3 are disabled in the “System Parameter” menu.
Reloading default programs
See the 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 then occurs by pressing and holding the input button approx. 5 s until acknowledgment 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.
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 button causes an immediate return to the basic display
Reloading default programs
Switching time programs P2 and P3 disabled
Reloading default programs
Switching time programs P2 and P3 enabled
- HC Direct heating circuit
- MC-1 Mixed heating circuit 1
- MC-2 Mixed heating circuit 2
- DHW Hot-water heating circuit
System Parameters” menu
The system parameters refer to general limiting parameters and specification values within the heating system. See 4.2 Menu-selection level, pg. 31 Returning to the basic display takes place by pressing the button or automatically after the set information time (see
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
- 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
Time program
This parameter specifies enabling of the switching time programs for program selection and for individualized 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
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 programs P1, P2, or P3 can be selected.
- Switching time programming: With switching time programming, the three switching time programs, P1 to P3, can be selected for each heating circuit.
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.
Individualized daytime room temperature for each heating circuit
- Press
button. - Select desired heating circuit (HC, MC-1, or MC-2) by turning the input button
- Confirm the selected circuit by pressing the input button
- Set the flashing room temperature specification to the desired value by turning the input button
- Confirm the 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
Individualized night-time room temperature for each heating circuit
- Press button.
- Select desired heating circuit (HC, MC-1, or MC-2) by turning the input button
- Confirm the selected circuit by pressing the input button
- Set the flashing room temperature specification to the desired value by turning the input button
- 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. 2
Individualized operating mode for each heating circuit
Each heating circuit can be assigned an individualized operating mode.
- Press button.
- Select desired heating circuit (HC, MC-1 or MC-2) by turning the input button
- Confirm the selected circuit by pressing the input button
- Select the flashing operating mode by turning the input button
- 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 and confirm the set value by pressing the input button
- Alternative: Automatic acceptance of the value after the set information time (see 4.1.2.7 “System information” button, pg. 26).
Summer / Heating limit
This parameter specifies the end of the heating operation depending
on the outside temperature based on the following criteria:
A quick increase in outside temperature
If the average outside temperature is below the set value and the current outside temperature is 2 K above the set value, the heating operation is interrupted.
the 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:
- 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 the outside sensor assignment.
- Active summer deactivation is represented by a beach umbrella the symbol in the basic display.
- Only active in the AUTOMATIC operating mode.
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.
- When the PARAM. RESET display flashes, press the input button
- SET flashes in the display.
- Press and hold the input buttonfor 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
DHW” menu
This menu contains all parameters required to program the hot water circuit, except the hot-water switching time programs.
Night-time hot-water temperature
This parameter specifies the temperature in the hot-water generator between the operational-readiness times in automatic mode.
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.
Reduced operation
During reduced operation, you can select between two operating modes
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.
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.
- Slightly progressive heating curves for floor or other area heating.
- 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
- Heavily progressive heating curves for general ventilator applications with high starting temperatures.
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 messages 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 the 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.
- 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.
- 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.
Log
Weekly switching program
| Object: | Set by: | On: | |||||||
| Mon (1) | 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 | ||||||||
| Time | |||||||||
| Setpoint | |||||||||
| Opt. | |||||||||
| Sat (6) | Cont. circuit | ||||||||
| Time | |||||||||
| Setpoint | |||||||||
| Opt. | |||||||||
| Sun (7) | Cont. circuit | ||||||||
| Time | |||||||||
| Setpoint | |||||||||
| Opt. | |||||||||
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
http://honeywell.com/uk
Printed in Germany
All rights reserved. Subject to change without notice.
EN2H-0220GE51 R0308
Art. 045 130 5546 – 0812 – 30
Honeywell SDC Remote Thermostat User Manual
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