Regulus TRS 3 User manual

www.regulus.eu
TRS 3
TRS 3
EN
Installation and Operation Manual
TRS 3 Controller

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REGULUS - TRS 3 Controller - www.regulus.eu
EC Declaration of Conformity
By afxing the CE mark to the unit the manufacturer declares that the TRS3 conforms to the following relevant
safety regulations:
- Directive 2006/95/EC - EC low voltage directive
- Directive 2004/108/EC - EC electromagnetic compatibility directive
General instructions - please do read!
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 qualied 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 manu-
facturer.
• 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 re. 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
Part A - Description and Installation
A 1 - Specication ................................................................................................................................ 4
A 2 - About the controller ..................................................................................................................... 4
A 3 - Scope of supply ........................................................................................................................... 5
A 4 - Explanation of symbols ............................................................................................................... 5
Part B - Hydraulic variants
Part C - Installation and Wiring
C 1 - Wall installation ........................................................................................................................... 6
C 2 - Electric wiring .............................................................................................................................. 7
C 3 - Installing the temperature sensors .............................................................................................. 7
Part D - Electric Wiring of Separate Hydraulic Variants
D 1 - Electrical terminals
............................................................................................................................................................. 8
D 2 - RC 21 Remote Controller with thermostat .................................................................................. 9
Part 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
Part F - Menu Description
F 1 - Measurements ............................................................................................................................. 13
F 2 - Statistics ...................................................................................................................................... 14
F 3 - Times ........................................................................................................................................... 15
F 4 - Operating modes ......................................................................................................................... 16
F 5 - Settings HC ................................................................................................................................. 17
F 6 - Protective functions ..................................................................................................................... 19
F 7 - Special functions ......................................................................................................................... 20
F 8 - Menu lock .................................................................................................................................... 22
F 9 - Service values ............................................................................................................................. 23
F 10 - Language .................................................................................................................................. 24
Part G - Defects and Maintenance
G 1 - Error and info messages ............................................................................................................. 25
G 2 - Replacing the fuse ...................................................................................................................... 26
G 3 - Maintenance ............................................................................................................................... 26
G 4 - Disposal ...................................................................................................................................... 26
G 5 - Useful hints and tricks ................................................................................................................ 27
Z 1 - CAN-Bus ..................................................................................................................................... 27

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A 2 - About the controller
The weather controlled Heating Controller TRS 3 facilitates efcient use and function control of your heating
system. This type is designed to control one mixed heating circuit. It is equipped with 3 outputs for e.g. one
pump and one mixing valve. The TRS3 has 3 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.
- 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 - DESCRIPTION AND INSTALLATION
A1-Specication
Electricspecication:
Mains voltage 230 V ~ ±10%
Mains frequency 50-60Hz
Power consumption cca 2 VA
Total switched power 460 VA
Switched power - mechanical relay 460 VA for AC1 / 185W for AC3
Internal fuse 2 A slow-blow, 250 V
El. protection IP40
Protection class II
Sensor inputs 3× Pt1000
1× remote controller
Measuring range -40 to 300 °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specications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 dots
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 mm2 extendable up to 30 m
Temperature resistance table for Pt1000 sensors:
°C 0 10 20 30 40 50 60 70 80 90 100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385

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A 3 - Scope of supply
- TRS3 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
- 1× pipe-mounted sensor of Pt1000 type, 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.
B - HYDRAULIC VARIANTS
The following illustrations should be viewed only as schematic diagrams showing the respective
hydraulic systems, do not claim to be complete. The controller does not replace safety device under
any circumstances. Depending on the specic 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.
Danger
Danger
Caution
Danger
Warning
Směšovaný otopný okruh Směšovaný otopný okruh
s řízeným zdrojem
MM
Mixed heating circuit Mixed heating circuit with
heat request

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C - INSTALLATION AND WIRING
C 1 - Wall installation
Install the controller in dry areas only.
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.
Obr. C 1.1
Fig. C 1.1
Fig. C 1.2
xing
points
xing
points
xing
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 t 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.d) and wire the cables following the diagrams in
Part B (Page 5).
5. Lock the housing lid onto the top margin of its
bottom counterpart, push the cables inside and close
the housing gently.
6. Secure with a screw.
7. Switch on mains voltage and place controller in
operation.
Danger
Danger
Fig. C 2.1
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!
Caution

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D - ELECTRIC WIRING OF SEPARATE
HYDRAULIC VARIANTS
M
MainsRelaisKleinspannungen
S3V1
S3 S2 S2 S1 S1 R2 R1LN N N
R3R3
+24V S4
CAN CAN
Mains voltage
230V/AC
4
3 3
4
222
D.1 Electrical terminals
Do not use the R3 terminal! It is permanently wired to 230V. Wrong wiring will
destroy the mixing valve actuator!
Warning
Terminal:: connection for::
S1 sensor 1 outdoor sensor
S1 sensor 1 outdoor sensor
S2 sensor 2 heating water
S2 sensor 2 heating water
S3 sensor room temperature
S3 sensor ground (GND-RC21)
V1
- earth
S4 remote controller (RC21)
+24V
CAN
N pump - conductor N
R1 pump - conductor L
N mains - conductor N
L mains - conductor L
N mixing valve - conductor N
R2 mixing valve - opens
R3 not used - 230V
R3 mixing valve - closes
The PE protective conductor shall be wired
to the PE metal terminal block!
Danger
Danger
24V DC power supply for external devices
(e.g. a °Caleon Room Unit), max. load 2 W
x
Sensor side max. 12 VAC / DC
Mains side 230 VAC 50 - 60 Hz
CAN bus terminal
is optional.
Terminal:: connection for::
0-10V output; heat request
An additional relay box is needed for heat
requests by switching contacts.

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D.2. RC 21 Remote Controller with thermostat
RC 21 Remote controller is an optional accessory to the Controller, not
supplied with the Controller as standard. The Controller is fully operational
without the RC21.
The room un it permits comfortable adjustment of heating from within your living space.
The front side accommodates a sliding mode switch and a dial to control the parallel shift
of a weather compensated heating curve. Inside there is a temperature sensor.
The dial is used for parallel shift of a heating curve. The ow temperature is raised or
lowered respectively by your adjustment. When the dial is turned all the way down,
the heating circuit is switched off. Frost protection stays active to prevent damage.
Sensor
The RC21 contains a temperature sensor which is used by the controller.
If the settings in the controller allow it, the sensor is used to modify the ow temperature.
The switch changes the operation mode of the controller.
In Auto - Timer mode the
temperature is controlled according to
the set thermostat periods.
In Continuous day mode the
set periods are ignored and the
temperature is controlled according to
the Day time settings.
In Continuous night mode the
temperature is usually set to lowest.
This setting is best suited for periods of
long absence like e.g. holidays.
Installation
Carefully remove the dial from the casing with a screwdriver. Loosen the screw beneath.
Remove the bright part of the casing from the black socket.
The RC21 is connected via terminal block to the controller.
The RC21 is suited for low voltage only!
Clamp connections:
1. Remote adjuster
2. Sensor
3. Sensor earth
1. Remote adjuster
(RC21)
2. Sensor
(RC21)
3. Sensor earth (GND RC21)
Caution

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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
ashes slowly red - if manual operation mode
is set
ashes quickly red - if an error occurred
Entries are made using four keys.
In the picture there is an „esc“ key (3) and 3 other
keys (4). The „esc” key (3) is used to cancel an entry
or to exit a menu. If applicable there will be a request
for conrmation 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 conrmation and
selection function.
Examples of key functions:
+/- increase/decrease values
▲▼ scroll menu up/down
YES/NO conrm/reject
Info additional information
Back to previous screen
OK conrm setting
Examples of display symbols:
pump (rotates when active)
valve (direction of ow is black)
heating - day mode
heating - night mode
heating - comfort mode
day mode
night mode
day mode by RC21
night mode by RC21
heat request ON/OFF
heat request incoming from CAN-Bus
heat requested over CAN-Bus
reference value mode
reference value mode
thermostat
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 selec-
tion there:

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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 (see 10)
- Menu 3 Time, date and operating times (see 3)
- Menu 5 Selection of Settings HC (see 5)
- Menu 6 Protective functions if necessary (see 6)
- Menu 7 Special functions if necessary (see 7)
Note!
Setup wizard is available in Menu 7.2
Observe the explanations for the individual parameters on the following pages, and check whether
further settings are necessary for your application.
Finally, menu 4.2 under operating mode “Manual“ should be used to test the switch outputs with the heat
consumers connected, and to check the sensor values for plausibility. Then set to automatic mode.
E 3 - Commissioning help - setup wizard
The rst 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 ter-
minated 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 parame-
ter in the display.
Pressing the “esc” key takes you back to the pre-
vious 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.

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F - MENU DESCRIPTION
Measurements menu 1
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.
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 7.1.
Caution
Caution

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Statistics menu 2
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!
2.1 - Today (owtemperatureforthepresentday)
In the graphical overview the characteristics of outdoor-and ow 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.
2.2 - 28 days (owtemperatureduringthelast28days)
In the graphical overview the characteristics of the outdoor and ow 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.
2.3 - Operating hours heating circuit
Display of operating hours of the heating circuit in Winter mode.
2.4 - Operating hours DHW
Display of operating hours of the DHW connected to the controller, and the date the measurement started.
2.5 - Operating hours additional heating
Display of operating hours of the additional heating connected to the controller, and the date the measurement
started.
Caution

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Times menu 3
3 - Times
Menu „3. Times” is used to set the time, date and
operating times for the heating circuit.
The associated temperature reference
values are specied in menu 5 „Settings”!
3.1 - Time & Date
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.
3.2 - Heating circuit day
This menu is used to select the daytime mode times for the heating circuit; three time periods can be specied
for each weekday and copied over to the following days.
Times that are not specied are automatically considered to be nighttime mode. The set times are
only taken into account in the heating circuit operating mode „Automatic”.
3.3 - 3.3 - Heating comfort
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.
Caution
Caution
Caution

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Operating mode menu 4
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 ow
temperature values only in the automatic mode.
4.1 - Heating circuit
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 ow temperature regardless of the outdoor temperature. The desired ow
temperature has to be set in Menu 4.3.
14 day reference value = Specic xed ow 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)
4.2 - Manual
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.
4.3 - Heating circuit reference
If operating mode „Reference value” is selected, (Menu 4.1), the reference ow temperature has to be set
here, regardless of the curve or outdoor temperature.
4.4 - 14 day reference
If operating mode „14 day reference value” is selected (Menu 4.1), the reference ow temperature for each
of the 14 days can be set here.
In the 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.
Danger
Danger

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Settings Heating circuit menu 5
5 - Settings HC
The necessary basic settings required for the control
function of the heating circuit are made in menu
„5. Settings HC”.
In no case may the Controller replace a
safety device installed in a hydraulic circuit!
5.1 - S/W Day = 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.
5.2 - S/W Night = 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.
5.3 - Curve = Slope of the weather compensated 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 ow 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 nally the steepness of the curve after the split. While adjusting the curve, the steepness of
the slope and the calculated reference ow temperature for -12 °C outdoor temperature is displayed.
The diagram shows the inuence of the selected characteristic curve steepness (standard curve) on the
calculated reference ow temperature of the heating circuit. The correct curve is appointed by setting the
intersection point of the calculated maximum ow temperature and the minimum outdoor temperature.
Example:
Maximum calculated ow temperature 60 °C at minimum outdoor temperature according to heat demand
calculation -12 °C.
The intersection results in a slope of 1.2..
Denní korekce
Danger

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Settings Heating circuit menu 5
The following settings (5.4 – 5.6) can be used for parallel shift of the characteristic for certain time
periods – day, night or comfort temperature.
5.4 - Day correction = parallel shift of the curve
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.
5.5 - Night correction = parallel shift of the curve
The night correction produces a parallel shift of the weather compensated heating curve during the nighttime
operating hours. If a negative value is set for the night correction, the reference ow 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 ow temperature in
nighttime operation that is by 7 °C below that of daytime operation.
5.6 - Comfort temperature boost = parallel shift of the curve
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.
5.8 - Min. Flow
The minimum ow temperature is the lower limit of the heating curve.
5.9 - Max. Flow
If the temperature exceeds this value, the heating circuit is switched off until the temperature drops below again.
For safe operation, a safety thermostat shall be wired in series to a pump.
5.10. Heat Request
This function requests a burner after 1 minute if the ow temperature stays below the target ow temperature
minus the Reference/Actual value (see 5.12) for this time period. If the target ow temperature is reached, the
heat request is immediately switched off again.
Off: Heat request is deactivated
Switching: Switch exit V1 at heat request to 10 V
Modulating: The desired temperature controls the signal voltage at V1 (V1 = desired temperature/10).
CAN bus: The desired ow temperature is sent via CAN bus by the controller when heat request is received.
Conditions:
1. Controllers shall be mutually interconnected by a CAN connection cable (page 27).
2. Only one controller requests the heat source directly, either modulating or by switching contact. This contro-
ller has to be connected to the requested heat source by V1 or by V1 with additional relay (Section 5.10).
3. For all other controllers, CAN bus shall be selected in Section 5.10. If one or more controllers request a heat
source according to the conditions described above, this request is transmitted via CAN bus together with the
required ow set temperature. The controller connected to the heat source passes this requirement promptly
to the heat source. If more than one controller sends a heat request via CAN bus, the request with the highest
required ow set temperature has priority.
5.11. Energy Saving Mode
The Energy saving mode switches the heating on when T eco is undershot und heats up to Teco + hysteresis
when solar charge or solid fuel boiler is active.
5.13. Reference/Actual
Switch on hysteresis for additional heating
This setting determines the allowed undershoot of the heating circuit temperature below the ow temperature
calculated from the heating curve. If the HC ow temperature and the storage temperature drop below the
desired ow temperature by hysteresis, the additional heat source will start after a 1 minute delay.
5.14. Threshold
When Energy saving mode is active, this value is used instead of TH set. When the temperature drops below T
eco at thermostat sensor S1, the boiler relay is switched on that switches off at the value of Threshold + hysteresis.
Caution
Danger

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Protective functions menu 6
6 - Protective functions
Menu 6 “Protective functions” can be used by spe-
cialists to activate and set various protective functions.
This does not under any circumstances
replace the safety facilities to be provided
by the customer!
6.1 - Seizing protection
If the anti-seizing protection is activated, the controller switches the pump and the mixer on/off at 12:00 noon
for 5 seconds to prevent seizing of the pump/valve after long periods of inactivity.
6.2 - Frost protection
Frost protection function can be activated 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 tempe-
rature set in menu 6.3 (min. ow temperature). As soon as the outdoor temperature exceeds 1 °C, the heating
circuit is switched off again.
Switching the frost protection function off or setting the minimum ow temperature too low can lead
to severe damage of the system.
6.3-Min.owtemperature 
The minimum ow temperature is the lower limit for the weather compensated curve/slope and as a result of
the reference ow temperature of the heating circuit. Additionally, the min. ow temperature is the reference
ow temperature for the frost protection.
6.4-Max.owtemperature
This is used as the upper limit for the reference ow temperature of the heating circuit. Should the heating
circuit temperature exceed this value, the heating circuit is switched off until the temperature drops below.
For safety, an additional limiting thermostat must be provided which is connected to the pump in
series.
6.5. Discharge Protection
If the required ow temperature is not reached despite the mixing valve being completely open, then this pro-
tection is activated that switches off the circulation pump.
Danger
Danger
Danger
Settings Heating circuit menu 5
5.15. Mod. Offset
At modulated heat request the requested temperature can be increased by the value adjusted here.
5.16. 14-day Reference
If operating mode “14-day reference value” is selected (Menu 4.4), the reference ow temperature for each of
the 14 days can be set here.
The Menu 4.4.1 shows the starting time of the programme. To start the programme, press “restart”.
Pressing “restart” again will reset the 14-day reference programme and restart it at Day 1.

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REGULUS - TRS 3 Controller - www.regulus.eu
Special functions menu 7
7 - Special functions
Menu „7. Special functions” is used to set basic
items and expanded functions.
The settings in this menu should only be
made by a specialist.
7.1 - Sensor calibration
Deviations in the temperature values displayed, for example due to cables which are to long or sensors which
are not positioned optimally, can be compensated for manually here. The settings can be made for each
individual sensor in steps of 0.5 °C.
7.2 - Commissioning
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 (see also E 3).
May only be started by a specialist during commissioning! Observe the explanations for the
individual parameters in these instructions, and check whether further settings are necessary for
your application.
7.3 - Factory settings
All of the settings that have been made can be reset, thus returning the controller to its delivery state.
The entire parametrization, statistics, etc. of the controller will be lost irrevocably. The controller
must then be commissioned once again.
7.4 - Mixer
Settings are only necessary at the time of initial commissioning by the specialist. Incorrect measu-
rement values can lead to severe unpredictable errors.
7.4.1 - Turn time
The mixer is switched on i.e. is opening or closing for the timespan set here, then the temperature is measu-
red to control the ow temperature.
7.4.2 - Pause Factor
The calculated pause time of the mixer is multiplied with the value set here. If the pause factor is 1, the normal
pause time is used, 0.5 will use half the normal pause time. Setting the pause factor to 4 would quadruple the
pause time.
7.4.3 - Increase
If the temperature rises very fast, this value is added to the measured ow temperature so that the mixer’s
reaction is faster.
If the measured temperature does not rise any more, the measured value is used again. The measurement
occurs once every minute.
7.5 - Room controller
The settings necessary for the optional room controller RC21 are made in this menu. The 3 modes
„continuous day”,„continuous night” and „Time controlled/automatic” can be switched at the RC21.
Additionally the reference temperature of the ow can be parallel shifted by turning the control wheel. If the
wheel is set to minimum, only the minimum values that can be set in the protective functions menu will be used.
Danger
Caution
Caution
Caution