Regulus TRS 4, TRS 5 Installation, Wiring And Operating Instructions

TRS 4 Controller

EN

v 1.0

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 TRS4 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.

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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 ............................................................................................................... 5

B - Hydraulic variants

C - Installation and Wiring

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 - Menu Description

F 1 - Measurements ............................................................................................................................ 13

F 2 - Statistics ...................................................................................................................................... 14

F 3 - Times ........................................................................................................................................... 15

F 4 - Operating modes ......................................................................................................................... 16

F 5 - Settings HC ................................................................................................................................. 18

F 6 - Settings HC 2 .............................................................................................................................. 20

F 7 - Protective functions ..................................................................................................................... 21

F 8 - Special functions ......................................................................................................................... 22

F 9 - Menu lock .................................................................................................................................... 24

F 10 - Service values ............................................................................................................................. 25

F 11 - Language ..................................................................................................................................... 26

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 1-5)
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 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

Ω 1000 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 4 facilitates efficient use and function control of your heating
system. This type is designed to control two heating circuits, one mixed and one direct. It is equipped with
5 connection outputs for e.g. two pumps and one mixing valve. The TRS4 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 4:

- 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

- TRS4 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× 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.

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1. Mixed heating circuit, no boiler,
no accumulation tank

3. Mixed heating circuit with boiler
and accumulation tank

5. Two heating circuits - mixed and direct one,
with boiler, no accumulation tank

2. Mixed heating circuit with boiler,
no accumulation tank

4. Two heating circuits - mixed and direct one,
no boiler, no accumulation tank

6. Two heating circuits - mixed and direct one,
with boiler and accumulation tank

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.

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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

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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.

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 mm

2

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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

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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.

Note: If the hydraulic variant 4, 5 or 6 (page 5) is used, then the sensor of heating circuit 2 shall be connected
to terminal S3.
If an accumulation tank is used, the sensor can be connected to terminal S4 (see menu 7.4).

- Temperature sensors S1 – S6
(polarity freely selectable)

- Optional additional functions Z1/Z2

Terminal: connection for:

- Jumper terminal block S­S1 sensor 1 outdoor sensor
S2 sensor 2

heating circuit
S3 sensor 3 heating circuit 2
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 HC2 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

Warning / Error message

Additional heating

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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, setting the clock

4. Operating times for heating circuit, manual mode

5. Set parameters for the heating circuit.

6. Set parameters for the 2nd heating circuit.

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. HC2 settings

5. HC settings

4. Operating mode

3. Times

2. Statistics

1. Measurements

7. Protections

8. Special functions

9. Menu lock

10. ServiceData

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 4.3 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 4.3 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.

Settings for heating circuit 2 are not included in the Setup wizard. These settings shall be adjusted
in Menu 6 „HC2 Settings”.

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F - MENU DESCRIPTION

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 1 connected to the controller, and the date the measurement
started.

F 2.4 - Operating hours heating circuit 2 menu 2.4

Display of operating hours of the heating circuit 2 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.

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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.

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

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 circ. 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 - Heating circ. 2

menu 4.2

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 2 is switched off (except Frost protection)

Setting range:
Auto, Continuous day, Continuous night, Reference value, 14 day reference, Off
Default: Off

F 4.3 - Manual

menu 4.3

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.

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Operating mode menu 4

F 4.4 - Heating circuit reference menu 4.4

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 4.5 - 14 day reference

menu 4.5

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 4.6 - Heating circuit 2 reference (HC2)

menu 4.6

If operating mode „HC2 Reference value” is selected, (Menu 4.2), the reference flow temperature 2 has to be
set here, regardless of the curve or outdoor temperature.

Setting range: 10 °C to 75 °C
Default: 30 °C

F 4.7 - 14 day reference HC2

menu 4.7

If operating mode „14 day reference HC2” is selected (Menu 4.2), the HC2 reference flow temperature for
each of the 14 days can be set here.
In the first menu 4.7.1 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.

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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 = 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.

Setting range: from -10 °C to +50 °C
Default: 5 °C

F 5.5 - Night correction menu 5.5 = parallel shift of the curve
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 = 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.

Setting range: from 0 °C to 15 °C
Default: 0 °C = off.

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 = vypínací hystereze
(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

If sensor 4 is not connected, the additional heating at R5 is switched off when the sensor of
the heating circuit S2 (respectively, of the heating circuits S2 and S3) reaches or exceeds the
reference flow temperature.

It is recommended to install sensor 4 in the accumulation tank at the same level (or below) of the
heating circuit conduit to prevent unnecessary switching of the additional heating.

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Settings Heating circuit 2 menu 6

F 6 - Settings HC 2

The necessary basic settings required for the control
function of the DHW heating are made in menu
„6. Settings HC 2”.

The menu is closed by pressing „esc” or selecting
„Exit settings”.

The settings for Su/Wi Day, Su/Wi Night,
Reference/actual- and Reference/
actual+, which are made in „Settings
heating circuit” are applied to both

heating circuits.

F 6.1 - Curve

menu 6.1 = slope of the heating curve 2

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:
*Curve: simple or split / Default: simple
Slope: 0,0-3,0 / Default: 0,8
Splitpoint at outdoor temperature: +10 °C … -10 °C
Angle: differs, depends on steepness and split point

The following settings can be used for parallel shift of the curve for certain periods such as
daytime and nighttime.

F 6.2 - Day correction menu 6.2 = parallel shift of the heating curve 2
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 6.3 - Night correction menu 6.3 = parallel shift of the heating curve
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 6.4 - Comfort temperature boost menu 6.4 = parallel shift of the heating 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.

Setting range: from 0 °C to 15 °C
Default: 0 °C = vyp.

Caution

Caution

21

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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 = DHW max. temp.
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 - Max. flow temperature 2 menu 7.5 = DHW 2 max. temp.
Settings for the 2nd heating circuit.
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

Set this to activate the 2nd heating circuit.

Danger

Danger

Danger

Caution

│

22

Special functions menu 8

F 8 - Special functions

Menu „8. Special functions” is used to set basic
items and expanded functions.

The settings in this menu should only be
made by a specialist.

The menu is closed by pressing „esc” or selecting
„Exit special functions”.

F 8.1 - Sensor calibration menu 8.1 / 8.1.1 - 8.1.6

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.

Offset S1...S6 per settings range : -10 °C...+10 °C
Default: 0 °C

Settings are only necessary in special cases at the time of initial commissioning by the specialist.
Incorrect measurement values can lead to unpredictable errors.

F 8.2 - Commissioning menu 8.2

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.

F 8.3 - Factory settings

menu 8.3

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.

F 8.4 - Expansions

menu 8.4

This menu can only be selected and used if additional options or expansion modules have been built into the
controller. The associated supplementary installation, mounting and operation instructions are then included
with the specific expansion.

F 8.5 - Mixer

menu 8.5

Settings are only necessary at the time of initial commissioning by the specialist. Incorrect
measurement values can lead to severe unpredictable errors.

F 8.5.1 - Turn time

menu 8.5.1

The mixing valve is switched on i.e. is opening or closing for the time span set here, then the temperature is
measured to control the flow temperature.

Settings range: 0.5 sec to 3 sec.
Default: 2 s

Danger

Caution

Caution

Caution

Caution

23

│

Special functions menu 8

F 8.5.2 - Pause-Factor menu 8.5.2

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, „4” would quadruple the pause time.

Setting range: 0.1 to 4.0
Default: 1,0

F 8.5.3 - Increase

menu 8.5.3

If the temperature rises very fast, this value is added to the measured flow 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.

Setting range: 0 to 20
Default: 8

F 8.6 - Room controller menu 8.6

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 flow 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.

In the operating modes „Reference value” and „14day ref.” the remote adjuster is without
function.

F 8.6.1 - Room controller - setting

menu 8.6.1

This value is used to appoint the amount of influence (in %) the room temperature has on the reference flow
temperature. For every degree of deviation of the room temperature from the reference room temperature the
percentage of the calculated reference flow temperature set here is added to or, respectively, subtracted from
the reference flow temperature. As long as it is within the limits of the min. and max. flow temperatures that
can be set in the protective functions.

Setting range: 0 % to 20 %
Default: 0

Example:
Reference room temp.: e.g. 25 °C;
room temp.: e.g. 20 °C = 5 °C deviation.
Calculated reference temp..: e.g. 40 °C: Room controller: 10 % = 4 °C.
5 × 4 °C = 20 °C. According to this 20 °C are added to the reference flow temperature, resulting in
60 °C. If the value is higher than the one set in max. flow temp., the resulting temperature is only the
one set in max. flow temp.

F 8.6.2 - Room reference day

menu 8.6.2

The desired room temperature for day mode. As long as this temperature is not reached, the reference flow
temperature is raised or respectively lowered according to the percent setting in „room controller”. If „room
controller” is set to 0 %, this function is deactivated.

Setting range: 10 °C to 30 °C
Default: 20 °C

F 8.6.3 - Room reference night menu 8.6.3

The desired room temperature for night mode. As long as this temperature is not reached, the reference flow
temperature is raised or respectively lowered according to the percent setting in „room controller”. If „room
controller” is set to 0 %, this function is deactivated.

Setting range: 10 °C to 30 °C
Default: 20 °C

Caution

│

24

Menu lock menu 9

F 9 - Menu lock

Menu „9. Menu lock” can be used to secure the
controller against unintentional changing of the set
values.

The menu is closed by pressing „esc” or selecting
„Exit menu lock”.

The menus listed below remain completely accessible despite the menu lock being activated, and can be used
to make adjustments if necessary:

F 1 - Measurements
F 2 - Statistics
F 3 - Times
F 8 - Menu lock
F 9 - Service values

To block the other menus, select „Menu lock on”. To enable the menus again, select „Menu lock off”

.

Setting range: on, off
Default: off

25

│

Ser vice values menu 10

F 10 - Service values

The menu „10. Service values” can be used for
remote diagnosis by a specialist in the event of an
error etc.

The data may be entered e.g. into the
following table.

The menu can be closed at any time by pressing
„esc”.

Caution

10.1 10.31 10.61

10.2 10.32 10.62

10.3 10.33 10.63

10.4 10.34 10.64

10.5 10.35 10.65

10.6 10.36 10.66

10.7 10.37 10.67

10.8 10.38 10.68

10.9 10.39 10.69

10.10 10.40 10.70

10.11

10.41 10.71

10.12 10.42 10.72

10.13 10.43 10.73

10.14 10.44 10.74

10.15 10.45 10.75

10.16 10.46 10.76

10.17 10.47 10.77

10.18 10.48 10.78

10.19 10.49 10.79

10.20 10.50 10.80

10.21 10.51 10.81

10.22 10.52 10.82

10.23 10.53 10.83

10.24 10.54 10.84

10.25 10.55 10.85

10.26 10.56 10.86

10.27 10.57 10.87

10.28 10.58 10.88

10.29 10.59 10.89

10.30 10.60 10.90

│

26

Language menu 11

F 11 - Language

Menu „11. Language” can be used to select the
language for the menu guidance. This is queried
automatically during initial commissioning. Language
selection is not available in every device design!

G - DEFECTS AND MAINTENANCE

G 1 - Malfunctions with error messages

If the controller detects a malfunction, the red light
flashes and the warning symbol also appears in the
display. If the error is no longer present, the warning
symbol changes to an info symbol and the red light no
longer flashes.

To obtain more detailed information on the error,
press the key under the warning or info symbol.

Do not try to deal with this yourself.
Consult a specialist in the event of an error!

Possible error messages: Notes for the specialist:

Sensor x defective Means that either the sensor, the sensor input at the controller or the
connecting cable is/was defective. (Resistance table see chap. A6)

Restart

Means that the controller was restarted, for example due to a power failure.

(Information only) Check the date&time!

(Ledflashes+ warning symbol)

27

│

G 2 - Replacing the fuse

Repairs and maintenance may only be performed by a specialist. Before working on the unit,
switch off the power supply and secure it against being switched on again! Check for the absence
of power!

Only use the supplied spare fuse or a fuse of the same design with the following specifications: T2A 250V

If the mains voltage is switched on and the controller
still does not function or display anything, then the
internal device fuse may be defective. In that case,
open the device, remove the old fuse and check it.
Exchange the defective fuse for a new one, locate the
external source of the error (e.g. pump) and exchange
it. Then first recommission the controller and check
the function of the switch outputs in manual mode as
described under 4.3.

G 3 - Maintenance

In the course of the general annual maintenance of your heating system you should also have the functions of
the controller checked by a specialist and have the settings optimized if necessary.

Performing maintenance:

- Check the date and time (see 3.1.)

- Assess/check plausibility of statistics (see 2)

- Check the error memory (see 2.6)

- Verify/check plausibility of the current measurement values (see 1)

- Check the switch outputs/consumers in manual mode (see 4.3)

- Possibly optimize the parameter settings

Caution

FUSE

Fig. 3.1.1

/20

REGULUS spol. s r.o.

Do Koutů 1897/3 http://www.regulus.eu
143 00 Praha 4

E-mail: [email protected]

│

28

G 4 - Useful hints and tricks

The service values (see 10) include not only current measurement values and operating states,
but also all of the settings for the controller. Write the service values down just once after
commissioning has been successfully completed.

In the event of uncertainty as to the control response or malfunctions the service values are
a proven and successful method for remote diagnosis. W

rite the service values down (see 15) at
the time that the suspected malfunction occurs. Send the service value table by fax or e-mail with
a brief description of the error to the specialist.

T

o protect against loss of data, record any analyses and data that are particularly important to

you at regular intervals (see 7).

G 5 - Disposal

IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE
WITH THE EUROPEAN DIRECTIVE 2002/96/EC

European Directive 2002/96/EC requires that the equipment
bearing this symbol on the product and/or its packaging
must not be disposed of with unsorted municipal waste.
The symbol indicates that this product should be disposed
of separately from regular household waste streams. It is
your responsibility to dispose of this and other electric and
electronic equipment via designated collection facilities
appointed by the government or local authorities. Correct
disposal and recycling will help prevent potential negative
consequences to the environment and human health. For
more detailed information about the disposal of your old
equipment, please contact your local authorities, waste
disposal service, or the shop where you purchased the
product.

WEEE registration number: 02771/07-ECZ