Regulus TRS 5 Operating instructions

TRS 5 Controller
EN
v 1.1
Installation, wiring and operating instructions

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EC Declaration of Conformity
By affixing the CE mark to the unit the manufacturer declares that the TRS5 conforms to the following relevant
safety regulations:
- Directive 2006/95/EC - EC low voltage directive (LVD)
- Directive 2004/108/EC - EC electromagnetic compatibility directive (EMC)
General instructions - it is essential to read this!
These installation and operating instructions contain basic instructions and important information regarding
safety, installation, commissioning, maintenance and the optimal use of the unit.
Therefore these instructions must be read completely and understood by the installation technician/specialist
and by the system user.
Installation shall be done according to valid standards and rules. The controller does not under any
circumstances replace any safety devices to be provided by the customer (e.g. a safety valve, air vent valve
etc.)!
The installation shall be done by a qualified specialist who is trained accordingly.
For the user:
Make sure that the specialist gives you detailed information on the function and operation of the controller.
Always keep these instructions in the vicinity of the controller.
Changes to the unit
Changes to the unit can compromise the safety and function of the unit or the entire solar system!
• Changes, additions to or conversion of the unit are not permitted without written permission from the
manufacturer.
• It is forbidden to install additional components that have not been tested together with the unit.
• The controller must not be used after an accident when its functions could have been altered - e.g. after
a fire. It must be turned off immediately.
• Use only original spare parts.
• Marking of the manufacturer and distributor must not be altered or removed.
• Only the settings actually described in these instructions may be made on the controller.
Danger

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CONTENTS
A - Description and Installation
A 1 - Specification ...................................................................................................................... 4
A 2 - Description ......................................................................................................................... 5
A 3 - Scope of supply ................................................................................................................. 5
A 4 - Explanation of symbols in texts ......................................................................................... 5
B - Hydraulic variants
C - Installation
C 1 - Wall installation .................................................................................................................. 7
C 2 - Electric wiring ..................................................................................................................... 8
C 3 - Installing the temperature sensors ..................................................................................... 8
D - Electric Wiring of Hydraulic Variants
E - Controller Use
E 1 - Display and input ............................................................................................................... 10
E 2 - Menu sequence and menu structure ................................................................................. 11
E 3 - Commissioning help - setup wizard ................................................................................... 12
E 4 - Free commissioning ........................................................................................................... 12
F - Parameter Setting
F 1 - Measurements .................................................................................................................... 13
F 2 - Statistics ............................................................................................................................. 14
F 3 - Times .................................................................................................................................. 15
F 4 - Operating modes ................................................................................................................ 16
F 5 - Settings HC ........................................................................................................................ 17
F 6 - Settings DHW ..................................................................................................................... 19
F 7 - Protective functions ............................................................................................................ 20
F 8 - Special functions ................................................................................................................ 21
F 9 - Menu lock ........................................................................................................................... 23
F 10 - Service values .................................................................................................................. 24
F 11 - Language ......................................................................................................................... 25
G - Defects and Maintenance
G 1 - Error and info messages ................................................................................................... 26
G 2 - Replacing the fuse ............................................................................................................. 27
G 3 - Maintenance ...................................................................................................................... 27
G 4 - Useful hints and tricks ....................................................................................................... 28
G 5 - Disposal ............................................................................................................................. 28

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A - DESCRIPTION AND INSTALLATION
A 1 - Specification
Electric specification:
Mains voltage 230 V ~ ±10 %
Mains frequency 50-60Hz
Power consumption 2 VA
Total switched power 460 VA (relay outputs 1-3)
Switched power per relay 460 VA for AC1 / 185W for AC3
Internal fuse 2 A slow-blow, 250 V
El. protection IP40
Protection class II
Sensor inputs 5× Pt1000
1× remote controller
Measuring range -40 to 110 °C
Permissible ambient conditions:
Ambient temperature
- for controller operation 0-40 °C
- for transport/storage 0-60 °C
Air humidity
- for controller operation max. 85 % rel. humidity at 25 °C
- for transport/storage no moisture condensation permitted
Other specifications and dimensions:
Housing design 2-part, ABS plastic
Installation method wall installation
Overall dimensions 163 × 110 × 52 mm
Aperture installation dimensions 157 × 106 × 31 mm
Display fully graphical display, 128 × 64 bodů
Operation 4 entry keys
Optional temperature sensors:
Immersion sensor Pt1000, with lead TT/P4 up to 95 °C
Pipe-mounted sensor Pt1000, pipe-mounted TR/P4 up to 95 °C
Outdoor temperature sensor Pt1000, type TA52
Remote controller Pt1000, type RC21
Sensor leads 2× 0.75 mm2extendable up to 30 m
Temperature resistance table for Pt1000 sensors:
°C 0 102030405060708090100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385

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A 2 - About the controller
The weather controlled Heating Controller TRS 5 facilitates efficient use and function control of your heating
system. This type is designed to control one mixed heating circuit and domestic hot water (DHW) heating.
It is equipped with 5 connection outputs for e.g. two pumps and one mixing valve and one heat source (boiler).
The TRS 5 has 6 connection inputs for heat sensors and a remote controller. For each step in the input
process the individual entry keys are assigned to appropriate functions and explained. The controller menu
contains headwords for the measured values and settings, as well as help texts or clearly-structured graphics.
Important properties of TRS 5:
- both graphics and texts on a backlit display
- simple viewing of the current measurement values
- analysis and monitoring of the system also by means of statistical graphics
- extensive menus with interactive explanations
- menu lock can be activated to prevent unintentional setting changes
- usual preset parameters in factory setting
A 3 - Scope of supply
- TRS5 heating controller
- 3 screws 3.5 × 35 mm and 3 plugs 6mm for wall installation
- 6 strain relief clips with 12 screws
- Replacement fuse 2A slow-blow, 250 V
- Installation, wiring and operating instructions
- 2× pocket-mounted temperature probe Pt1000, with lead TT/P4 up to 95 °C
- 1× pipe-mounted sensor Pt1000, pipe-mounted TR/P4 up to 95 °C
- 1× outdoor sensor Pt1000, type TA52
A 4 - Explanation of symbols
Failure to observe these instructions can result in danger to life from electric voltage.
Failure to observe these instructions can result in serious damage to health such as scalding, or
even life-threatening injuries.
Failure to observe these instructions can result in destruction of the unit or the system, or damage
to the environment.
Information which is especially importation for the function and optimal use of the unit and the
system.
Danger
Caution
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B - HYDRAULIC VARIANTS
The following illustrations should be viewed only as schematic diagrams showing the respective hydraulic
systems, and do not claim to be complete. The controller does not replace safety device under any
circumstances. Depending on the specific application, additional system components and safety components
may be mandatory, such as check valves, non-return valves, safety temperature limiters, scalding protectors,
etc., and must therefore be provided.
1. Mixed heating circuit with accumulation tank
2. Mixed heating circuit with accumulation tank and DHW storage tank
3. Mixed heating circuit with DHW storage tank
In heating installations where domestic hot water is not needed, the DHW heating can be deactivated
in menu 4„Operating mode“. In heating installations without accumulation tank the sensor has to be
installed in an appropriate position ahead of the mixer.
Caution

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C - INSTALLATION
C 1 - Wall installation
Install the controller in dry areas only and under the ambient conditions described in A 1.
Installation instructions:
1. Unscrew cover screw completely.
2. Carefully pull upper part of housing from lower part.
3. Set upper part of housing aside, being sure not to
touch the electronics when doing so.
4. Hold the lower part of the housing up to the
selected position and mark the 3 mounting holes.
Make sure that the wall surface is as even as possible
so that the housing does not become distorted when it
is screwed on.
5. Using a drill and size 6 bit, drill 3 holes at the points
marked on the wall and push in the plugs.
6. Insert the upper screw and screw it in slightly.
7. Fit the upper part of the housing and insert the other
two screws.
8. Align the housing and tighten the three screws.
Fig. C 1.1
Fig. C 1.2
fixing
points
fixing
points
fixing
points

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C 2 - Electric wiring
Low-voltage cables such as temperature sensor cables must be routed separately from mains
voltage cables. Feed temperature sensor cables only into the left-hand side of the unit, and mains
voltage cables only into the right-hand side.
The controller is not equipped with a mains switch. For this purpose please use e.g. a circuit
breaker. The cables being connected to the unit must not be stripped by more than 55 mm, and the
cable jacket must reach into the housing just to the other side of the strain relief.
Wiring instructions:
1. Make sure the circuit breaker is in off position and
power supply is off.
2. Open the controller.
3. Strip the cable by 55 mm max., insert and fit the
cable strain relief. Strip the last 8-9 mm of all the wires
(C.2.1).
4. Press the terminals e.g. with a screwdriver (Fig.
C.2.1) and wire the cables following the diagrams in
section D.
5. Lock the housing lid onto the top margin of its
bottom counterpart, push the cables inside and close
the housing gently. Secure with the screw.
6. Switch on mains voltage and place controller in
operation.
Fig. C 2.1
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C 3 - Installing the temperature sensors
The controller operates with Pt1000 temperature sensors.
Max. sensor lead length is 30 m and its cross section at least 0.75 mm2.
Make sure that there is no contact resistance! Use immersion or pipe-mounted sensors.
The temperature sensor cables must be routed separately from mains voltage cables!
As default, S6 is jump-wired with S terminal in order to keep functions of the heating circuit in
operation. If the jumper gets removed, the heating circuit stops heating. Should a RC21 remote
controller be used, the jumper at S6 shall be removed. If an external thermostat is connected, its
electrical contacts shall be of floating type and low resistance = circa 0 Ohm.
Caution
Caution

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D - Electric wiring
Sensor side - max 12V Mains side - 230V 50Hz
*Note: If the RC21 remote controller or another room thermostat is connected, the bridge at S6 has to be
removed.
- Temperature sensors S1 - S6
(polarity freely selectable)
- Optional additional functions Z1/Z2
Terminal: connection for:
- jumper terminal block S-
S1 sensor 1 outdoor sensor
S2 sensor 2 heating water
S3 sensor 3 DHW
S4 sensor 4 accumulation tank
S5 sensor 5 indoor sensor
S6 sensor 6 remote controller*
+ free
Z1 optional / expansion
Z2 optional / expansion
Use terminal block S- for connecting the
sensor earths of S1-S6.
The polarity is freely selectable.
The sensors S3-S6 are optional, depending
on the hydraulic variant chosen.
- Protective conductor PE, metal terminal block
- Neutral conductor terminal block N
- Mains phase conductor L
- Switch output R1-R4
- Floating contact at R5/R5I
Caution: Only suitable for 230V!
Terminal: connection for:
N jumper terminal block N
L mains phase conductor L
R1 heating circuit pump
R2 mixing valve opens
R3 mixing valve closes
R4 valve / DHW pump
R5 add. heating
R5I add. heating
PE The PE protective conductor
must be connected to the PE
metal terminal block!
jumper terminal block S jumper terminal block N

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E - CONTROLLER USE
E 1 - Display and input
The display (1) shows graphic and text info on the hydraulic variant, set and measured values and other text
info.
The LED lamp (2):
lights up green - if a relay is closed and the
controller works right
lights up red - if the controller is set to
automatic operation and all
relays are open
flashes slowly red - if manual operation mode
is set
flashes quickly red - if an error occurred
Entries are made using four keys - „esc” key (3)
and three keys (4), to which different functions are
assigned depending on the situation.
The „esc“ key (3) is used to cancel an entry or to exit
a menu.
If applicable there will be a request for confirmation
as to whether the changes which have been made
should be saved.
The function of each of the other three keys (4) is
shown in the display line directly above the keys;
the right-hand key generally has a confirmation and
selection function.
Examples of key functions:
+/- increase/decrease values
▼/▲scroll menu up/down
YES/NO confirm/reject
Info additional information
Back to previous screen
OK confirm setting
Examples of display symbols:
pump (rotates when active)
valve (direction of flow is black)
heating - day mode
heating - night mode
heating - comfort mode
day mode
night mode
day mode by RC21
night mode by RC21
reference value mode
reference value 14 day
warning / error message
new information available

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E 2 - Menu sequence and menu structure
The graphics or overview mode appears when no key
has been pressed for 2 minutes, or when the main
menu is exited by pressing „esc“.
Pressing any key (4) in graphics or overview mode
takes you directly to the main menu.
The following menu items are then available for
selection there:
1. Current temperature values with explanations
2. Function control of the system with operating hours etc.
3. Operating times for heating circuit and DHW, setting the clock
4. Operating times for heating circuit and DHW, manual mode
5. Set parameters for the heating circuit
6. Set parameters for DHW
7. Anti-seizing protection, Frost protection, Anti-Legionella
activation
8. Sensor calibration, Remote controller, Mixing valve etc.
9. Lock against unintentional setting changes
10. For diagnosis in the event of an error
11. Language selection
6. DHW settings
5. HC settings
4. Operating mode
3. Times
2. Statistics
1. Measurements
7. Protections
8. Special functions
9. Menu lock
10. Service Data
11. Language

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E 3 - Commissioning help - setup wizard
The first time the controller is turned on, language and
clock need to be set.
After that a query appears as to whether you want to
parameterize the controller using the commissioning
help or not. The commissioning help can also be
terminated or called up again at any time in the
special functions menu. The commissioning help
guides you through the necessary basic settings in
the correct order, and provides brief descriptions of
each parameter in the display. Pressing the „esc” key
takes you back to the previous value so you can look
at the selected setting again or adjust it if desired.
Pressing the „esc“ more than once takes you back
step by step to the selection mode, thus cancelling
the commissioning help. Finally, menu 4.2 under
operating mode „Manual” should be used to test the
switch outputs with the consumers connected, and to check the sensor values for plausibility. Then switch on
automatic mode.
E 4 - Free commissioning
If you decide not to use the commissioning help, you should make the necessary settings in the following
sequence:
- Menu 10. Language
- Menu 3. Time, date and operating times
- Menu 5. Settings for the heating circuit
- Menu 7. Protective functions if necessary
- Menu 8. Special functions if necessary
Finally, menu 4.2 under operating mode „Manual“ should be used to test the switch outputs with the
consumers connected, and to check the sensor values for plausibility. Then switch on automatic mode.
Observe the explanations for the individual parameters on the following pages, and check whether
further settings are necessary for your application.
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F - PARAMETER SETTING
Measurements menu 1
F 1 - Measurements
Menu „1. Measurements” serves to display the
currently measured temperatures.
The menu is closed by pressing „esc” or selecting
„Exit measurements”.
Selecting „Info” leads to a brief help text explaining
the measurement values.
Selecting „Overview” or „esc” exits the Info mode.
If „Error” appears on the display instead of the measurement value, then there may be a defective
temperature sensor or its wiring.
If the cables are too long or the sensors are not placed optimally, the result may be small deviations in the
measurement values. In this case the display values can be compensated for using the function of sensor
compensation - see 8.1.
What measurement values are displayed depends on the selected program, sensors connected and the
specific controller model.
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Statistics menu 2
F 2 - Statistics
Menu „2. Statistics” is used for function control and
long-term monitoring of the system.
The submenus described under 2.1-2.5 are available.
The menu is closed by pressing „esc” or selecting
„Exit statistics”.
For system data statistics it is essential for the time to be set accurately on the controller. Please
note that the clock continues to run for about 24 hours if the mains voltage is interrupted, and after
that it has to be reset. Improper operation or an incorrect time may result in data being cleared,
recorded incorrectly or overwritten.
The manufacturer accepts no liability for the recorded data!
F 2.1 - Today Menu 2.1 (flow temperature for the present day)
In the graphical overview the characteristics of outdoor-and flow temperature for the present day is shown
from 0-24h. The right button changes the unit of time and the two left buttons scroll through the diagram.
F 2.2 - 28 days Menu 2.2 (flow temperature during the last 28 days)
In the graphical overview the characteristics of the outdoor and flow temperature during the last 28 days is
shown. The right button changes the unit of time (Days) and the two left buttons scroll through the diagram.
F 2.3 - Operating hours heating circuit menu 2.3
Display of operating hours of the heating circuit connected to the controller, and the date the measurement
started.
F 2.4 - Operating hours DHW menu 2.4
Display of operating hours of the DHW connected to the controller, and the date the measurement started.
F 2.5 - Operating hours additional heating menu 2.5
Display of operating hours of the additional heating connected to the controller, and the date the measurement
started.
F 2.6 - Error messages menu 2.6
Display of the last three errors in the system with indication of date and time.
F 2.7 - Reset / clear menu 2.7
Resetting and clearing the individual statistics. Selecting „All statistics” clears everything except for the error
log.
Caution

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Times menu 3
F 3 - Times
Menu „3. Times” is used to set the time, date and
operating times for the heating circuit and DHW.
The associated temperature reference
values are specified in menu 5 „Settings”!
The menu is closed by pressing „esc” or selecting
„Exit times”.
F 3.1 - Time & Date menu 3.1
This menu is used to set the current time and date.
For proper functioning of the controller and statistics for the system data it is essential for the time
to be set accurately on the controller. Please note that the clock continues to run for about 24
hours if the mains voltage is interrupted, and after that has to be reset.
F 3.2 - Heating circuit day menu 3.2
This menu is used to select the daytime mode times for the heating circuit; three time periods can be specified
for each weekday and copied over to the following days.
Setting range: Three time ranges for each day of the week
Default: Mo-Su 6:00-22:00
Note: See 5. for the associated temperature settings
Times that are not specified are automatically considered to be nighttime mode. The set times are
only taken into account in the heating circuit operating mode „Automatic”.
F 3.3 - Heating comfort menu 3.3
This menu can be used to select a time range for each day of the week in which the heating circuit is supplied
with an increased comfort temperature, e.g. for quick heating in the morning.
Setting range: One time range for each day of the week
Default: Mo-Su off.
Note: See 5. for the associated temperature settings
F 3.4 - Hot water enable menu 3.4
This menu is used to select the times when the domestic hot water heating is enabled (sensor 3); three time
periods can be specified for each weekday and copied over to the following days.
Setting range: Three time ranges for each day of the week
Default: Mo-Su 6:00-22:00
Note: See 6. for the associated temperature settings
Times that are not specified are set to „disabled”.
F 3.5 - Hot water AL menu 3.5
A period of time can be set here for each week day when the domestic hot water part of the installation
(sensor 3) is heated up to higher temperature, e.g. for anti Legionella function.
Setting range: One period of time for each day of the week
Default: Mo-Su off
Note: See 7.5. for the associated temperature settings
This anti-Legionella function does not provide complete protection against Legionella, because
the controller is dependent on sufficient energy being fed in, and it is not possible to monitor the
temperatures in the entire range of the storage tanks and the connected piping system. To provide
complete protection against Legionella bacteria, it must be ensured that the temperature is raised
to the necessary value (see section 5 for more info).
Caution
Caution
Caution
Caution
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Operating mode menu 4
F 4 - Operating mode
Menu „4. Operating mode” is used to specify the
operating modes for the heating circuit.
After an interruption of the mains voltage the
controller automatically returns to the last operating
mode selected!
The menu is closed by pressing „esc” or selecting
„Exit operating mode”.
The controller works with the set operating
times and the corresponding different
reference flow temperature values only in
the automatic mode.
F 4.1 - Heating circuit menu 4.1
Auto = Automatic/Normal mode using the set times.
Continuous Day = The set values for day mode are used.
Continuous Night = The set values for night mode are used.
Reference value = Fixed flow temperature regardless of the outdoor temperature. The desired flow
temperature has to be set in Menu 4.3.
14 day reference value = Specific fixed flow temperatures can be set for the next 14 days in menu 4.4.
After 14 days, the reference temperature of the 14th day is used until the operating mode is changed.
Off. = Heating circuit is switched off (except Frost protection)
Setting range:
Auto, Continuous day, Continuous night, Reference value, 14 day reference, Off
Default: Automatic
F 4.2 - Manual menu 4.2
In Manual mode the individual relay outputs and the connected consumers can be checked for proper
functioning and correct assignment.
The operating mode „Manual” may only be used by specialists for brief function tests, e.g. during
commissioning.
Function in manual mode:
The relays and thus the connected consumer are switched on and off by pressing a key, with no regard to the
current temperatures and the parameters which have been set. At the same time, the current measurement
values of temperature sensors are also shown in the display for the purposes of function control.
F 4.3 - Heating circuit reference menu 4.3
If operating mode „Reference value” is selected, (Menu 4.1), the reference flow temperature has to be set
here, regardless of the curve or outdoor temperature.
Setting range: 10 °C to 75 °C
Default: 30 °C
F 4.4 - 14 day reference menu 4.4
If operating mode „14 day reference value” is selected (Menu 4.1), the reference flow temperature for each
of the 14 days can be set here.
In the first menu 4.4.1 the starting time of the program is shown. To start the program, press restart.
Pressing „restart” again will reset the 14 day reference program and start it at day 1.
F 4.5 - Domestic hot water menu 4.5
The domestic hot water heating can be activated here. „Auto” makes use of the times set in the „times”
menu (see 3.4), „On” activates continuously, and „Off” switches the DHW heating off.
Setting range: Auto, On, Off
Default: Auto
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Settings HC menu 5
F 5 - Settings HC
The necessary basic settings required for the control
function of the heating circuit are made in menu
„5. Settings HC”.
The menu is closed by pressing „esc” or selecting
„Exit settings”.
F 5.1 - S/W Day menu 5.1 = Summer/Winter changeover in daytime mode
If this value is exceeded at outdoor sensor S1 during the daytime mode times, the controller automatically
switches the heating circuit off = Summer mode.
If the outdoor temperature drops below this value, the heating circuit is switched on again = Winter mode.
Setting range: 0 °C to 30 °C
Default: 18 °C
F 5.2 - S/W Night menu 5.2 = Summer/Winter changeover in nighttime mode
If this value is exceeded at outdoor sensor S1 during the nighttime mode times, the controller automatically
switches the heating circuit off = Summer mode.
If the outdoor temperature drops below this value, the heating circuit is switched on again = Winter mode.
Setting range: 0 °C to 30 °C
Default: 12 °C
F 5.3 - Curve menu 5.3 = Slope of the heating curve
The demand for heat is different due to differences in the type of building/insulation/type of heating/outdoor
temperature. The characteristic curve is used to control the heat dissipation of the heating circuit relative to
the outdoor temperature. The controller can make use of a normal straight curve (Setting simple) or a split
curve (Setting split) that is divided into 2 parts by a split point. The straight curve can be set easily using one
parameter. The characteristic curve for the split mode is adjusted in 3 steps.
In the simple setting the curve can be adjusted with the help of the graphic diagram. The slope is changed,
and the calculated reference flow temperature is displayed for -12 °C.
Setting the split curve is more precise but more complicated. First the standard slope has to be set, after that
the split point and finally the steepness of the curve after the split. While adjusting the curve, the steepness of
the slope and the calculated reference flow temperature for -12 °C outdoor temperature is displayed.
Setting range:
Heating curve: simple or split / Default: simple
Slope: 0,0-3,0 / Default: 0,8
Split point at outdoor temp.: +10 °C … -10 °C
Angle: differs, depends on steepness and split point
The diagram shows the influence of the selected
characteristic curve steepness (standard curve) on the
calculated reference flow temperature of the heating
circuit. The correct curve is appointed by setting the
intersection point of the calculated maximum flow
temperature and the minimum outdoor temperature.
Maximum calculated flow temperature 60 °C at
minimum outdoor temperature according to heat
demand calculation -12 °C. The intersection results in
a slope of 1.2.
The following settings can be used for parallel
shift of the characteristic for certain time
periods such as daytime and nighttime mode.
Caution

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Settings HC menu 5
F 5.4 - Day correction menu 5.4 = paralelní posun křivky
The day correction means a parallel shift of the heating curve during the daytime operating hours, since
depending on the outdoor temperature it is possible that the building may not be optimally heated with the set
characteristic. If the characteristic is not optimized, the following situation may occur:
in hot weather - the rooms are too cold
in cold weather - the rooms are too hot
In this case, one should gradually reduce the characteristic slope in steps of 0.2, each time raising the day
correction by 2-4 °C.
This procedure can be repeated several times as needed.
Setting range: from -10 °C to 50 °C
Default: 5 °C
F 5.5 - Night correction menu 5.5 = paralelní posun křivky
The night correction produces a parallel shift of the heating curve during the nighttime operating hours. If
a negative value is set for the night correction, the reference flow temperature is lowered accordingly during
the nighttime operating hours. In this manner, primarily at night, but also during the day when no-one is at
home, energy can be saved.
Example: A day correction of +5 °C and a night correction of -2 °C produces a reference flow
temperature in nighttime operation that is by 7 °C below that of daytime operation.
Setting range: from -30 °C to 30 °C
Default: -2 °C
F 5.6 - Comfort temperature boost menu 5.6 = paralelní posun křivky
The comfort temperature boost is added to the set day correction. In this manner it is possible to carry out
quick heating and/or a higher temperature in the living spaces at a certain time each day.
Setting range: from 0 °C to 15 °C
Default: 0 °C = vyp.
F 5.8 - Reference / actual - menu 5.8 = switch-on hysteresis for additional heating
This setting determines the allowed undershoot of the heating circuit temperature under the calculated
reference flow temperature. If the heating circuit flow temperature falls below the reference temperature by this
value, the additional heating (R5) is activated after a delay of 5 minutes.
Setting range: -10 °C to 10 °C
Default: -2 °C
The additional heating (relay R5) is started when the flow temperature (in case of 2 heat circuits:
one of the flow temperatures)is below the reference flow temperature for 5 minutes continuously.
F 5.9 - Reference / actual + menu 5.9 = switch-off hysteresis
(only if sensor S4 is connected)
This settings determines the allowed overstepping of the heating circuit temperature to the calculated
reference flow temperature at sensor S4. If the temperature at S4 exceeds the reference flow temperature by
this value, the additional heating is switched off.
Setting range: 1 °C to 10 °C
Default: 2 °C
Caution

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Settings DHW menu 6
F 6 - Settings DHW
The necessary basic settings required for the control
function of the DHW heating are made in menu
„6. Settings DHW”.
The menu is closed by pressing
„esc” or selecting „Exit settings”.
F 6.1 - DHW min. menu 6.1 = Minimum domestic hot water temperature
If outside the time periods set in the „Times“ menu (see 3.4), i.e. the DHW is disabled, the temperature at the
DHW sensor S3 drops below the one set here, the domestic hot water charging (relay 4) and the additional
heating (relay 5) is switched on.
Setting range: 10 °C to 60 °C
Default: 45 °C
F 6.2 - DHW Setpoint menu 6.2 = Minimum domestic hot water temperature
If the temperature at the DHW sensor S3 drops below the temperature set here and the DHW charging is
enabled, the DHW charging (relay R4) and the additional heating (relay R5) are activated.
Setting range: 10 °C to 60 °C
Default: 45 °C
F 6.3 - DHW hysteresis menu 6.3 = DHW hysteresis
DHW charging (relay R4) and additional heating (relay R5) are switched off when the temperature at DHW
sensor S3 reaches the set values (see 6.1 and 6.2) plus the DHW hysteresis.
Setting range: 2 °C to 20 °C
Default: 10 °C
F V6.4 - Buffer HW load menu 6.4 = Charge DHW from the accumulation tank
DHW charging via relay R4 directly from the accumulation tank is activated when the temperature at
accumulation tank sensor S4 is at least 8 °C warmer than the DHW sensor S3.

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Protective functions menu 7
F 7 - Protective functions
Menu „7. Protections” can be used by specialists to
activate and set various protective functions.
This does not under any circumstances
replace the safety facilities to be provided
by the customer!
The menu is closed by pressing
„esc” or selecting „Exit protections“
F 7.1 - Seizing protection menu 7.1
If the anti-seizing protection is activated, the controller switches the pump and the valve on/off at 12:00 pm for
5 seconds to prevent seizing of the pump/valve after long periods of inactivity.
Setting range: on, off
Default: on
F 7.2 - Frost protection menu 7.2
Frost protection function for the heating circuit. If the outdoor temperature at sensor S1 drops below 1 °C and
the heating circuit is switched off, the controller switches it back on with the reference temperature set in menu
7.3 (min. flow temperature). As soon as the outdoor temperature exceeds 1 °C ,the heating circuit is switched
off again.
Setting range: on, off
Default: on
Switching the frost protection function off or setting the minimum flow temperature too low can
lead to severe damage of the system.
F 7.3 - Min. flow temperature menu 7.3
The minimum flow temperature is the lower limit for the characteristic curve/slope and as a result also for the
reference flow temperature of the heating circuit. Additionally, the min. flow temperature is the reference flow
temperature for the frost protection.
Setting range: 5 °C to 30 °C
Default: 15 °C
F 7.4 - Max. flow temperature menu 7.4
This is used as the upper limit for the reference flow temperature of the heating circuit. Should the heating
circuit temperature exceed this value, the heating circuit is switched off until the temperature drops below. This
feature is used e.g. to protect underfloor heating.
Setting range: 30 °C to 105 °C
Default: 45 °C
For safety, an additional limiting thermostat must be provided which is connected to the pump in
series.
F 7.5 - Anti Legionella menu 7.5
When the anti Legionella function is active, the domestic hot water part at sensor S3 can be heated up to
a specific temperature, provided that the energy is sufficient.
AL function - Setting range: On, Off / Default: Off
AL Tset - Setting range: 60 °C to 80 °C / Default: 70 °C
AL interval - Setting range: 1 to 28 days / Default: 7 days
AL heat: The last time the AL function completed successfully.
During the anti-Legionella function the storage tank is heated up to high temperatures which can lead to
scalding and damage to the system.
The operating times for the AL function have to be set in the „Times” menu (see 3.5)
This anti-Legionella function does not provide complete protection against Legionella, because the controller
is dependent on sufficient energy being fed in, and it is not possible to monitor the temperatures in the
entire range of the storage tanks and the connected piping system. To provide complete protection against
Legionella bacteria, it must be ensured that the temperature is raised to the necessary temperature, and at the
same time there must be water circulation in the storage tank and piping system by means of other additional
energy sources and control units.
7.6 Discharge protection menu 7.6
To prevent unnecessary cool down of the system, the heating circuit is switched off when the buffer
temperature drops below reference temperature.
Settings range: On, Off / Default: Off
Danger
Danger
Danger