Honeywell R0808, EN2H-0221GE51 R0808 User Manual
Smile SDC heating and
district heating controller
SERVICE MANUAL
EN2H-0221GE51 R0808
EN2H-0221GE51 R0808
SDC / DHC Contents
Contents
1 Software version ..........................................................................................................11
2 Safety instructions.......................................................................................................11
2.1 Intended use .....................................................................................................11
2.2 Requirements for start-up..................................................................................11
2.2.1 Power supply ........................................................................................12
2.2.2 Connection conditions ..........................................................................12
2.2.3 Cable cross-sections ............................................................................12
2.2.4 Maximum cable lengths........................................................................12
2.2.5 Cable installation ..................................................................................12
2.2.6 Grounding and zeroing .........................................................................13
2.3 Hot-water temperature greater than 60 °C ........................................................13
2.4 Connection of accessory parts ..........................................................................14
2.5 Maintenance and cleaning ................................................................................14
2.6 Safety precautions for EMC-compliant installation ............................................15
3 Overview.......................................................................................................................20
4 Abbreviations ...............................................................................................................21
5 Operation......................................................................................................................22
5.1 Display and operating elements ........................................................................22
5.1.1 Display (basic display)..........................................................................23
5.1.2 Operating elements ..............................................................................24
5.1.2.1 Input button (press / turn)........................................................24
5.1.2.2 "Daytime room temperature" button ........................................24
5.1.2.3 "Night-time room temperature" button.....................................25
5.1.2.4 "Daytime hot-water temperature" button .................................25
5.1.2.5 "Operating mode" button (basic display) .................................26
5.1.2.6 "Switching time programs / Holiday programs" button ............33
5.1.2.7 "System information" button....................................................35
5.1.2.8 "Manual mode" / "Emission measurement" button ..................44
EN2H-0221GE51 R0808 3
Contents SDC / DHC
5.1.2.9 Access to the technician / OEM area ......................................46
5.1.2.10 Heating curve..........................................................................47
5.2 Menu-selection level..........................................................................................48
5.2.1 "Time - Date" menu ..............................................................................54
5.2.2 "Timeprograms" menu ..........................................................................55
5.2.2.1 Selection of the control circuit .................................................56
5.2.2.2 Selection of the program .........................................................56
5.2.2.3 Selection of day of the week and cycle ...................................56
5.2.2.4 Programming switching times and cycle temperatures ...........57
5.2.3 "System Parameters" menu..................................................................72
5.2.3.1 Language selection .................................................................72
5.2.3.2 Time program..........................................................................73
5.2.3.3 Operating mode ......................................................................74
5.2.3.4 Parameter reset ......................................................................76
5.2.3.5 Complete reset........................................................................77
5.2.4 "DHW" menu ........................................................................................77
5.2.4.1 Night-time hot-water temperature............................................78
5.2.4.2 Legionella protection day ........................................................78
5.2.5 "Direct Heating Circuit" / "Mixed Heating Circuit 1" / "Mixed
Heating Circuit 2" menu........................................................................78
5.2.5.1 Reduced operation..................................................................79
5.2.5.2 Heating system .......................................................................80
5.3 Error messages.................................................................................................80
5.4 Parameter settings ............................................................................................81
5.4.1 "Hydraulics" menu (HYDRAULIC) ........................................................81
5.4.2 "System parameters" menu (SYSTEM)................................................85
5.4.3 "Hot-water circuit" menu (DHW) ...........................................................89
5.4.4 "Direct heating circuit" menu (UNMIXED CIRC) ...................................92
5.4.5 "Mixed heating circuit 1 / 2" (MIX.VALVE - 1 / MIX.VALVE - 2)
menus ...................................................................................................95
5.4.6 "Heat generator" menu (HEAT GENER................................................99
4 EN2H-0221GE51 R0808
SDC / DHC Contents
5.4.7 "District hot water" menu (DIST.HEATING) ........................................104
5.4.8 "Return increase" menu (RETURN CONTR)......................................105
5.4.9 "Solar" menu (SOLAR) .......................................................................106
5.4.10 "Solid" menu (SOLID FUEL) ...............................................................107
5.4.11 "Buffer" menu (BUFFER)....................................................................108
5.4.12 "Total flow regulation" menu (MAIN SUPPLY)....................................109
5.4.13 "Cascading" menu (CASCADE) .........................................................110
5.4.14 "Data bus" menu (BUS) ......................................................................111
5.4.15 "Relay test" menu (RELAY TEST ) ....................................................111
5.4.16 "Error messages" menu (ALARM) ......................................................112
5.4.17 "Error messages 2" menu (ALARM 2) ................................................113
5.4.18 "Sensor calibration" menu (SENSOR ADJ.) .......................................113
6 Control Functions ......................................................................................................114
6.1 Variable adjustment of the hydraulic parameters (variable inputs and
outputs) ...........................................................................................................114
6.1.1 Connection and settings table ............................................................116
6.2 Switching time program enabling ....................................................................117
6.3 Suppressing the cycle temperature on time program level..............................118
6.4 Enabling "Separate Control Mode"..................................................................118
6.5 Switching from SDC to DHC ...........................................................................119
6.6 Selection of hydraulic parameter presettings ..................................................119
6.7 The variable inputs and outputs of device series SDC/DHC 43 ......................119
6.8 General functions and their operation .............................................................120
6.8.1 Outside temperature sensing..............................................................120
6.8.1.1 Building type .........................................................................120
6.8.2 Heating circuit outside temperature assignment.................................121
6.8.3 Outside temperature emergency operation value...............................121
6.8.4 Outside temperature disable...............................................................122
6.8.5 Climate zone.......................................................................................122
6.8.6 Design temperature ............................................................................122
6.8.7 Summer switch-off..............................................................................123
EN2H-0221GE51 R0808 5
Contents SDC / DHC
6.8.8 System frost protection.......................................................................124
6.8.9 Pump forced operation .......................................................................127
7 Hydraulic Components..............................................................................................128
7.1 Heat generator: Boiler .....................................................................................128
7.1.1 Heat generator start-up protection......................................................128
7.1.2 Heat generator minimum temperature limit.........................................129
7.1.3 Maximum temperature limit heat generator ........................................130
7.1.4 Heating circuits minimum temperature limit ........................................130
7.1.5 Heat generator sensor control mode ..................................................130
7.1.6 Minimum burner runtime.....................................................................131
7.1.7 Switching: Multi-stage heat generator/Switching differential...............131
7.1.8 Operation for modulating burners .......................................................136
7.1.9 Modulation of P part (Xp)....................................................................137
7.1.10 Modulation of sample time Ta.............................................................137
7.1.11 Modulation of integral action time Tn ..................................................138
7.1.12 Modulation of runtime .........................................................................138
7.1.13 Modulation of start time ......................................................................138
7.1.14 Modulation of start power ...................................................................139
7.1.15 OpenTherm ........................................................................................140
7.1.16 Use of boiler sensor 2.........................................................................141
7.1.17 External heat generator cut-off ...........................................................141
7.1.18 Heat generator forced discharge ........................................................141
7.1.19 Exhaust gas temperature monitoring ..................................................142
7.1.20 Burner counter mode ..........................................................................143
7.2 Heat generation, heat exchanger, district heating ...........................................144
7.2.1 On/Off operation of the district heating valve......................................145
7.2.2 Continuous heat exchanger valve control...........................................145
7.2.3 District heating return temperature limit..............................................147
7.2.4 Return temperature limit for hot-water loading....................................149
7.2.5 Hot-water pre-regulator with district heating systems .........................150
7.2.6 Mode of operation: Hot-water pre-control ...........................................151
6 EN2H-0221GE51 R0808
SDC / DHC Contents
7.2.7 Quick hot-water control.......................................................................152
7.2.8 Mode of operation of hot-water control mode "external
operation" ...........................................................................................154
7.2.9 Conditional parallel operation for mixed heating circuits.....................155
7.2.10 Circulation pump control mode ...........................................................155
7.2.11 Switch-off of district heating control ....................................................156
7.2.12 Return interval flushing .......................................................................156
7.2.13 Heat meter for additional limitation according to the volume flow
or thermal output ................................................................................156
7.2.14 Charging pump (CHP) ........................................................................157
7.2.15 Primary pump .....................................................................................158
7.2.16 Boiler circuit pump ..............................................................................158
7.2.17 Return increase ..................................................................................159
7.2.17.1 Bypass pump (RBP)..............................................................160
7.2.17.2 Return maintenance through controlled feed water
addition 160
7.2.17.3 Indirect return increase .........................................................161
7.3 Heating circuit .................................................................................................161
7.3.1 General heating circuit functions ........................................................161
7.3.1.1 Heating curve........................................................................161
7.3.1.2
7.3.1.3 Reduced operation................................................................164
7.3.1.4 Heating system .....................................................................164
7.3.1.5 Heating circuit temperature limit............................................164
7.3.1.6 Heating circuit temperature offset .........................................165
7.3.1.7 Heating circuit pump extended running time .........................165
Heating curve setting (heating curve)....................................162
7.3.1.8 Screed function .....................................................................165
7.3.2 Heating circuit constant temperature control ......................................168
7.3.3 Fixed-value control .............................................................................168
7.3.4 Consideration of the room temperature/room influence......................169
7.3.4.1 Heating circuit room connection............................................169
7.3.4.2 Heating circuit room factor ....................................................170
EN2H-0221GE51 R0808 7
Contents SDC / DHC
7.3.4.3 Heating circuit room controller ..............................................171
7.3.4.4 Switch-on/switch-off optimisation ..........................................171
7.3.4.5 Room setpoint ramp..............................................................175
7.3.4.6 Heating limit function.............................................................175
7.3.4.7 Heating circuit room frost protection limit ..............................177
7.3.4.8 Mixed heating circuits cooling switch-over ............................177
7.3.4.9 Heating circuit name .............................................................180
7.3.4.10 Room thermostat function (maximum room
temperature limit) ..................................................................181
7.3.5 Hot-water production ..........................................................................187
7.3.5.1 Hot-water tank loading (SLP) ................................................187
7.3.5.2 Circulation pump (CIR.).........................................................194
7.3.6 Solar/Solid fuel/Buffer.........................................................................196
7.3.6.1 Solar function ........................................................................196
7.3.6.2 Buffer tank function ...............................................................199
7.3.6.3 Solid fuel function..................................................................212
7.3.7 Tank loading switch-over....................................................................213
7.3.8 Hydraulic buffer relief (HBR)...............................................................215
Easy enabling and disabling of a heating pump .................................216
7.3.9
7.3.10 Other system components..................................................................217
7.3.10.1 Global fault message input....................................................217
7.3.10.2 Global fault message output .................................................217
7.3.10.3 Timer 217
7.3.10.4 External switching modem ....................................................218
7.3.10.5 External information ..............................................................219
7.3.10.6 Demand contact....................................................................219
7.3.11 Bus communication ............................................................................221
7.3.11.1 Bus address of central device ...............................................221
7.3.11.2 Control functions via the data bus.........................................222
7.3.11.3 Operation of wall devices ......................................................227
7.3.12 Cascading of heat generators in the bus system................................232
8 EN2H-0221GE51 R0808
SDC / DHC Contents
7.3.12.1 General description of cascading of control devices .............232
7.3.12.2 Function of the cascade parameters.....................................233
7.3.12.3 Mode of operation of cascade control ...................................234
7.3.13 Commissioning, maintenance and troubleshooting help ....................237
7.3.13.1 Automatic set function...........................................................237
7.3.13.2 Emission measurement (not for DHC 43) .............................238
7.3.13.3 Relay/function test.................................................................239
7.4 Error messages...............................................................................................243
7.4.1 Basic display/fault stack fault messages ............................................248
7.4.1.1 Sensor calibration .................................................................249
7.4.1.2 Full controller reset................................................................249
7.4.1.3 Controller time correction ......................................................249
8 Technical data............................................................................................................250
8.1 General ...........................................................................................................250
8.1.1 Installation recommendations .............................................................251
8.2 Sensor resistance values ................................................................................251
8.2.1 NTC 20 ...............................................................................................251
8.2.2 PT 1000 ..............................................................................................252
8.3 Sensor measurement ranges ..........................................................................252
8.4 Digital inputs....................................................................................................253
9 Log ..............................................................................................................................254
Index....................................................................................................................................255
EN2H-0221GE51 R0808 9
Contents SDC / DHC
10 EN2H-0221GE51 R0808
SDC / DHC Software version
1 Software version
This documentation is valid for software version V 3.0 of your
control device. The software version is displayed after switch-on
for approx. 8 s. If you are using an older software version, please
contact your heating technician.
2 Safety instructions
2.1 Intended use
The SDC / DHC Smile family of controllers was designed for the
sole purpose of regulating and controlling hot-water, heating and
district heating systems (including hot-water production) that do
not exceed a maximum flow temperature of 120 °C.
2.2 Requirements for start-up
ATTENTION
The heating system must be complete and filled with water
so that the pumps do not run dry and the heating boiler is not
damaged.
The control equipment must be installed in accordance with
the installation instructions.
All electrical connections (voltage supply, burner, mixer
motor, pumps, sensor wiring etc.) must be carried out by the
technician in accordance with the applicable VDE regulations
and correspond with the circuit diagrams.
If floor heating is connected, a limiting thermostat must also
be installed in the flow line after the heating circuit pump.
This switches off the pumps at excessive flow temperatures.
Before starting up the controller, have the heating technician
check all requirements listed above.
NOTE
The current time and date are already set at the factory and are
backed up by a battery.
The time switch functions based on a basic program and the
control functions are preset for common heating systems with lowtemperature boilers.
EN2H-0221GE51 R0808 11
Safety instructions SDC / DHC
2.2.1 Power supply
Do not disconnect the controller from the mains supply!
The battery for saving all individualised data is otherwise
unnecessarily strained. The frost-protection function of the
controller is deactivated.
2.2.2 Connection conditions
All electrical connection work may only be carried out by qualified
personnel!
2.2.3 Cable cross-sections
1.5 mm2 for all cables carrying 230 V (power supply, burner,
pumps, actuator).
0.6 mm2 for bus cables (recommended type J-Y(St)Y 2 x 0.6).
0.5 mm2 for sensors, selectors and analog signal cables.
2.2.4 Maximum cable lengths
Sensor, selector and analog inputs
We recommend using cables no longer than 200 m. Longer
connection lines could be used, but increase the risk of
interference.
Relay outputs
Unlimited cable length.
Bus connections
Max. length of 100 m from the first bus subscriber to the last one
(incl. wall modules).
2.2.5 Cable installation
Install cables for sensors apart from the cables carrying 230 V!
Branch boxes in the sensor cable must be avoided!
12 EN2H-0221GE51 R0808
SDC / DHC Safety instructions
2.2.6 Grounding and zeroing
Local regulations on the connection of equipment must be
observed!
2.3 Hot-water temperature greater than 60 °C
ATTENTION
Note that there is a danger of scalding at all hot-water drawoff points (kitchen, bathroom etc.) in the following cases.
Add sufficient cold water in these cases.
Automatic anti-
legionella mechanism
When the automatic anti-legionella mechanism is activated, the
hot water is automatically heated to the anti-legionella
temperature (65 °C at the factory) on the selected day and at the
selected time to kill any legionella bacteria found in the hot-water
tank.
Manual mode /
Emission
measurement
In the manual mode / emission measurement operating mode, the
hot water is heated up to the highest possible boiler temperature,
as the burner and all pumps are switched on and the mixer is
opened fully. There is an acute danger of scalding at all
connected hot-water draw-off points! Add sufficient cold water or
switch off the hot-water loading pump (at the switch of the pump,
if present). Heating and hot water are in unregulated continuous
operation. This operating mode is for special use by the chimney
sweep for emission measurement or if the controller is defective.
The high hot-water temperatures can be prevented, however, by
setting the boiler thermostat to a max. boiler temperature of
approx. 60 °C.
EN2H-0221GE51 R0808 13
Safety instructions SDC / DHC
2.4 Connection of accessory parts
WARNING
According to VDE 0730, a separator for each mains terminal
is to be provided in the voltage supply to the control
equipment. Observe the local regulations regarding
grounding and zeroing.
As soon as the mains voltage is applied to terminals 21, 22,
2, 6, 12 and 18, headers X3 and X4 can also carry mains
voltage.
If the heating circuit and hot-water loading pumps do not
have an On / Off switch, but manual switch-on and switch-off
capability is still desired, the appropriate switches must be
installed by the customer. All accessory parts (sensors,
selectors etc.) are to be connected to the respective circuit
diagram.
2.5 Maintenance and cleaning
The controller is maintenance-free. The device can be cleaned
externally with a moist (not wet) cloth.
14 EN2H-0221GE51 R0808
SDC / DHC Safety instructions
2.6 Safety precautions for EMC-compliant installation
Mains lines and sensor/data bus lines must be installed separate
from each other. A minimum of 2 cm space must be present
between the lines. It is permissible to cross lines.
x
a
ç
é
æ
b
y
a Mains 230 V AC x 15 cm
b Data bus line 12 V AC y 2 cm
For control devices with their own mains connection, separate
installation of mains and sensor/bus lines must absolutely be
ensured. If cable ducts are used, they are to be provided with cutoff bridges.
EN2H-0221GE51 R0808 15
Safety instructions SDC / DHC
When installing control or wall devices, a minimum spacing of
40 cm to other electrical equipment with electromagnetic
emissions, e.g. relays, motors, transformers, dimmers, microwave
ovens and televisions, audio speakers, computers, cordless
telephones etc., is to be ensured.
ç
é
æ
x
x 40 cm
A minimum spacing of 40 cm is to be ensured between wall
devices and central devices. Multiple central devices in the data
bus system can be mounted directly next to one another.
16 EN2H-0221GE51 R0808
SDC / DHC Safety instructions
The mains connection of the heating system (boiler – panel –
control equipment) must be designed as a separate circuit.
Neither fluorescent lamps nor any machines which are potential
sources of interference may be connected/connectable.
a
c
b
ç
é
æ
ç
é
æ
d
e
a Safety fuse 16 A
b Boiler room emergency switch
c Connect boiler room lighting and electrical outlets to
separate circuits only!
d Wall devices
e Heat generator
Shielded cables must be used for the data bus lines.
For a recommended layout, see 8 Technical data, pg. 250
EN2H-0221GE51 R0808 17
Safety instructions SDC / DHC
The earth connection of the cable shielding must occur on one
side at the protective conductor connection, e.g. at the cladding
plate of the heat generator, protective conductor terminal etc.
Multiple earth connections of a single cable are not permissible
(buzzing loop).
ç
é
æ
a
b
ç
é
æ
PE
a No earth connection here! b Central device
18 EN2H-0221GE51 R0808
SDC / DHC Safety instructions
With star-topology data bus systems, double earth connections
may not be made. The earth connection must be made on one
side of the star!
a Shielding b Two-lead data bus line
c Distributor terminal d Branch box
The outside sensor may not be installed near transmitters or
receivers (e.g. on garage walls near garage door opener
receivers, amateur radio antennas, radio alarm systems or directly
next to large transmission equipment etc.).
EN2H-0221GE51 R0808 19
Overview SDC / DHC
3 Overview
The modular SDC / DHC control device is available in an
installable switch cabinet version and a surface-mounted wall
version with the following equipment features:
Type
SDC 3-10
SDC 3-40
SDC 7-21 1)
SDC 9-21 2)
SDC 12-31 3)
Number of output relays
Burner stage 2
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
3 – x x – – x –
3 – – – x – – – –
7 – x x x – x – –
7
x x x x – x x x
+ two
variable
relays
10
x x x x x x x x
+ two
variable
relays
1)
DHC 43-1
2)
DHC 43-2
3)
DHC 43-3
Variable output 1
20 EN2H-0221GE51 R0808
SDC / DHC Abbreviations
4 Abbreviations
The following abbreviations are used in this documentation/in the
display of the control device:
RED
OS
OS2
FGS
OT
BUS
OC1
OC2
DC
DCP
ECO
EHR
SFB
SFR
FC
Lowering operation
Outside sensor
Outside sensor 2
Flue gas sensor
Outside temperature
System data bus
Burner stage 1 operating hour
counter
Burner stage 2 operating hour
counter
Direct heating circuit
Direct heating circuit pump
Switch-off operation
Electric heating rod
Solid fuel boiler sensor
Solid fuel buffer sensor
Fixed-value control
BS 2
BLP
RBP
RP
SD I
SD II
TS
TLP
SLS
SLSS
SFD
SLP
STL
VO
VO1
Buffer sensor 2 (bottom)
Buffer loading pump
Return bypass pump
Return pump
Switching differential I
Switching differential II
Tank sensor
Tank loading pump
Solar loading switch-over
Solar loading switch-over sensor
Solar forced dissipation
Solar loading pump
Stratified tank loading pump
Variable output (general)
Variable output 1
SFP
PI
BP
CC
CRS
CTBS
CFS
MM
MC
MHP
P1
P2
P3
BS
Solid fuel pump
Pulse input
Boiler circuit pump
Constant control
Collector return sensor
Collector tank/buffer sensor
Collector flow sensor
Mixer motor
Mixed heating circuit
Mixed heating circuit pump
Switching time program
Switching time program
Switching time program
Buffer sensor (top)
VO2
VI
VI1
VI2
VI3
FM1
FM2
PHE
HG
HGS
WD
HW
CIR
CHP
Variable output 2
Variable input (general)
Variable input 1
Variable input 2
Variable input 3
Flow sensor of mixed heating
circuit 1
Flow sensor of mixed heating
circuit 2
Parallel heat generator enable
Heat generator
Heat generator sensor
Wall device for room temperature
sensing
Hot water
Circulation pump
Charging pump
EN2H-0221GE51 R0808 21
Operation SDC / DHC
5 Operation
5.1 Display and operating elements
5
1
2
3
4
1011
6
7
8
9
1 "Manual mode" / "Emission measurement" button (not on
district heating controllers)
2 "Operating modes" button (basic display)
3 "Switching time programs" / "Holiday programs" button
4 "System information" button
5 Display
6 Cover clip for service socket
7 "Daytime room temperature" button
8 "Night-time room temperature" button
9 "Daytime hot-water temperature" button
10 Input button (press / turn)
11 Operating mode symbols (heating programs)
22 EN2H-0221GE51 R0808
SDC / DHC Operation
5.1.1 Display (basic display)
1
C
2
5
3
4
1 Day of the week / Date 4 Operating mode symbols
2 Time 5 Heat generator temperature
3 Active operating mode
The illumination of the display is switched on by pressing any
button or using the input button î and switches off automatically
if no buttons are pressed for a longer period of time.
During start-up of the unit and after a power failure, a segment
test with automatic fault diagnosis is carried out. The respective
device type and the software version number then appear briefly.
The basic display that then appears shows the day of the week,
the date, the time and the heat generator temperature in
automatic mode. Different values appear in the basic display
depending on the set operating mode (AUTOMATIC, PARTY
etc.). Thus, for example, in the ABSENT operating mode, the
indication ABSENT TIL appears instead of the date and the return
date instead of the temperature. Active summer deactivation is
indicated by a beach umbrella symbol
protection is indicated by a snowflake symbol
À, and active frost
Á.
EN2H-0221GE51 R0808 23
Operation SDC / DHC
5.1.2 Operating elements
5.1.2.1 Input button (press / turn)
By pressing once, you can:
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
5.1.2.2 "Daytime room temperature" button
Sets the desired room temperature (room setpoint) in automatic
¥
mode during the heating cycles and in the PARTY and HEATING
operating modes. In operating mode 1, the set value for all
heating circuits is the same. In operating mode 2, the set value
applies for the respective heating circuit. To set the operating
mode, see 5.2.3.3 Operating mode, pg. 74.
Setting
► Press ¥ button.
► Set flashing room temperature specification to the desired
C
value by turning the input button î.
► Confirm set value by pressing the
button î.
¥ button or the input
Alternative: Automatic acceptance of the value after the set
information time (see 5.1.2.7 "System information" button, pg. 35).
Factory setting
Setting range
20 °C
5 ... 30 °C
24 EN2H-0221GE51 R0808
SDC / DHC Operation
5.1.2.3 "Night-time room temperature" button
Sets the lowered room temperature in automatic mode between
¦
the heating cycles and in the ABSENT and RED. HEATING
operating modes.
In operating mode 1, the set value for all heating circuits is the
same. In operating mode 2, the set value applies for the
respective heating circuit. To set the operating mode, see
5.2.3.3 Operating mode, pg. 74.
Setting
► Press ¦ button.
► Set flashing room temperature specification to the desired
C
Factory setting
Setting range
5.1.2.4 "Daytime hot-water temperature" button
§
Setting
value by turning the input button
î.
► Confirm set value by pressing the ¦ button or the input
button î.
Alternative: Automatic acceptance of the value after the set
information time (see 5.1.2.7 "System information" button, pg. 35).
16 °C
5 ... 30 °C
Sets the daytime hot-water temperature during the hot-water
operational-readiness times in automatic mode and in the PARTY
and HEATING operating modes. This set value also applies for
exclusively hot-water operation (manual summer operation).
► Press § button.
► Set flashing hot-water temperature to the desired value by
C
turning the input button î.
► Confirm set value by pressing the § button or the input
button î.
Alternative: Automatic acceptance of the value after the set
information time (see 5.1.2.7 "System information" button, pg. 35).
Factory setting
50 °C
EN2H-0221GE51 R0808 25
Operation SDC / DHC
Setting range
One-time hot-water
circuit loading
5.1.2.5 "Operating mode" button (basic display)
5 °C (hot-water economy temperature) ... Maximum hot-water
heater temperature limit (service setting)
Pressing and holding (approx. 3 s) the § button brings you to
the reload function, where the reload time can be set in minutes.
With a reload time of 0 minutes, loading is started once and the
hot-water tank is loaded to the daytime setpoint. The time for this
superimposed hot-water circuit loading can be set between 0 and
240 minutes. The current week program is superimposed here.
Sets the operating mode and returns to the basic display from
every operating level.
26 EN2H-0221GE51 R0808
SDC / DHC Operation
Overview of the operating modes
Symbol Operating mode Display Setting
ç
è
é
ê
ABSENT
PARTY
AUTOMATIC
SUMMER
P1 (P2, P3)*, return
date
P1 (P2, P3)*,
party end time
P1 (P2, P3)*
C
P1(P2, P3)*
C
ë
ì
í
HEATING
RED. HEATING
STANDBY
* P2 and P3 only after enabling, see "System Parameters"
menu, parameter 2 = P1 to P3
C
C
C
EN2H-0221GE51 R0808 27
Operation SDC / DHC
The selected operating mode appears in plain text, whereby a
marking at the bottom edge of the display points to the respective
operating mode symbol at the same time. In operating mode 1,
the set value for all heating circuits is the same. In operating
mode 2, the set value applies for the respective heating circuit. To
set the operating mode, see 5.2.3.3 Operating mode, pg. 74.
Setting
► Press button.
► Select operating mode by turning the input button î. The
marking is located above the corresponding operating mode
symbol.
► Confirm set operating mode by pressing the button or the
input button î.
► With short-term operating modes (ABSENT, PARTY), set the
Return to the basic
display
NOTE
5.1.2.5.1 Absence mode (short-term program)
desired value by turning the input button î and confirm with
the button or the input button î.
Alternative: Automatic acceptance of the value after the set
information time (see 5.1.2.7 "System information" button, pg. 35).
Press the button for approx. 3 s to return to the basic display
from any operating level.
Holiday mode is set via the "Switching time programs / Holiday
programs" button (see 5.1.2.6 "Switching time programs / Holiday
programs" button, pg. 33).
With the ABSENT operating mode, heating operation is
temporarily deactivated and protected from frost during brief
absences. During the absence, all heating circuits are adjusted to
the specified lowered room temperature. Once the set time
expires, the heating circuits automatically return to the operating
mode that was active before the switch to the absence operation.
Short-term programs such as PARTY or ABSENT are skipped
here.
Setting
Application
See 5.1.2.5 "Operating mode" button (basic display) , pg. 26
Short absence while heating operation is active.
28 EN2H-0221GE51 R0808
SDC / DHC Operation
Cancellation
Factory setting
Setting range
An active absence program can be cancelled in case of early
return.
► Press button.
► Turn input button î and switch to automatic operation.
The active absence program has been cancelled.
P1 as from activation
P1 (P2, P3) / 0.5 to 24 h to the current time
P1 (P2, P3)
Program-controlled resumption of heating operation. After
activation of the absence program, heating operation is
interrupted until the following switch-on time of the current
automatic program P1 (or P2 or P3, if enabled).
0,5 ... 24 h
The set value is added on to the current time and represents the
return time. When the absence program is called up again, the
last set value is saved and suggested as the initial value.
Display
An active absence program appears in the basic display with
information on the return time.
5.1.2.5.2 Party mode (short-term program)
Party mode causes one-time intermediate heating of all heating
circuits up to a specified point in time and bridges an upcoming or
already active absence cycle totally or partially. Once the set time
expires, the heating circuits automatically return to the operating
mode that was active before the party program. Short-term
programs such as ABSENT or PARTY are skipped here.
Setting
Application
See 5.1.2.5 "Operating mode" button (basic display) , pg. 26
One-time extension of heating operation or intermediate heating
during lowering operation outside the schedule.
EN2H-0221GE51 R0808 29
Operation SDC / DHC
Cancellation
Factory setting
Setting range
Display
An active party program can be cancelled early.
► Press button.
► Turn input button î and switch to automatic mode.
The active party program has been cancelled.
P1 as from activation
P1 (P2, P3) / 0.5 to 24 h to the current time P1
P1 (P2, P3)
Program-controlled resumption of heating operation. After
activation of the party program, heating operation is continued
until the following switch-on time of the current automatic program
P1 (or P2 or P3, if enabled)
0,5 ... 24 h
The set value is added on to the current time and represents the
end of the party time. When the party program is called up again,
the last set value is saved and suggested as the initial value.
An active party program appears in the basic display with
information on the party end time.
5.1.2.5.3 Automatic mode
In automatic operation, max. three time programs with different
heating operation times are available. They are called up during
C
start-up as factory-set and unlosable default programs P1, P2 or
P3 and can, if necessary, be overwritten with their own switching
times in the "Timeprograms" menu (see 5.2.2 "Timeprograms"
menu, pg. 55).
NOTE
Default programs P2 and P3 cannot be selected until the
PROGRAM = P1 to P3 parameter is enabled in the "System
Parameters" menu. Without enabling, only program P1 is active.
Setting
See 5.1.2.5 "Operating mode" button (basic display) , pg. 26
30 EN2H-0221GE51 R0808
Loading...