Regulus SRS3 E Installation, Wiring And Operation Manual

Installation, Wiring and Operation Instructions

REGULUS SRS3 E Controller

EN

v. 1.2

CONTENTS

A. - Safety Instructions 4

A.1 EC Declaration of Conformity 4
A.2 General information 4
A.3 Explanation of symbols 4
A.4 Changes to the unit 5

B. - Description 6

B.1 Specication 6
B.2 Temperature resistance table for Pt1000 sensors: 6

B.3 Desc ription 7
B.4 Scope of supply 7
B.5 Disposal 7

C. - Installation 8

C.1 Wall installation 8
C.2 Electrical wiring 9
C.3 Installing the temperature sensors 10

D. Terminal block wiring 11
D.1 Hydraulic variants 12

E. - Operation 14

E.1 Display and input 14
E.2 Commissioning help 15
E.3 Free commissioning 15

E.4 Menu sequence and menu structure 16

1. - Measurement s 16

2. - Statistics 17

2.1. - Operating hours 17

2.2. - Heat output 17

2.3. - Graphic over view 17

2.4. - Message log 17

2.5. - Reset/Clear 17

3. - Operating modes 18

3.1. - Auto 18

3.2. - Manual 18

3.3. - Of f 18

4. - Settings 19

4.1. - Tmin S1 19

4.3. - Priority Storage 1 19

4.4. - ΔT1 / ΔT (pool) 19

4.5. - Tmax S2 20

4.6. - Priority Storage 2 20

4.7. - ΔT2 20

4.8. - Tmax S3 20

4.13. - Tmax pool 20

4.14. - Tmax pool HE 21

4.15. - Priority temperature 21

4.16. - Loading time 21

4.17. - Increase 21

5. - System protection 22

5.1. - System protection 22

5.2. - Collector protection 22

5.3. - Recooling 23

5.4. - Frost protection 23

5.5. - Seizing protection 23

5.6. - Collector alarm 23

6. - Special functions 24

6.1. - Program selections 24

6.2. - Pump settings V1 24

6.2.1. - Type of pump 24

6.2.2. - Pump 24

6.2.3. - Output signal 24

6.2.4. - 0-10V / PWM Of f 25

6.2.5. - 0-10V / PWM On 25

6.2.6. - 0-10V / PWM Max 25

6.2.7. - Show signal 25

6.3. - Speed control 26

6.3.1. - Modes 26

6.3.2. - Purging time 27

6.3.3. - Sweep time 27

6.3.4. - Max. speed 27

6.3.5. - Min. speed 27

6.3.6. - Setpoint 27

6.3.7. - Temperature difference 27

6.5. - Relay functions 28

6.5.1. - Solar bypass 28

6.5.2. - Thermostat 29

6.5.3. - Cooling 30

6.5.4. - Return ow increase 30

6.5.5. - Collector cooling 31

6.5.6. - Anti Legionella 32

6.5.7. - Heat transfer 33

6.5.8. - Difference 3 4

6.5.9. - Solid fuel boiler 35

6.5.10. - Error message 35

6.5.11. - Booster pump 35

6.5.12. - Parallel operation R (X) 36

6.5.13. - Always on 36

6.5.14. - Heating circuit 36

6.6. - Heat quantity 37

6.6.1. - Constant ow rate 37

6.6.2. - Flow sensor 37

6.6.3. - Return ow 37

6.6.4. - Antifreeze type 37

6.6.5. - Glycol percentage 37

6.6.6. - Flow rate 37

6.6.7. - ΔT Offset 37

6.7. - Sensor calibration 38

6.8. - Commissioning 38

6.9. - Factory settings 38

6.10. - Start aid function 38

6.11. - Time and Date 39

6.12. - Daylight saving time 39

6.13. - Sleep mode 39

6.14. - Temperature unit 39

6.15. - Network 39

6.15.1. - Access control 39

6.15.2. - Ethernet 39

7. - Menu lock 40

8. - Ser vice values 41

9. - Language 42

Z. - Malfunctions, additional info 43

Z.1. Malfunctions with error messages 43
Z.2. Replacing the fuse 44
Z.3. Maintenance 45

Z.4. CAN bus 46

Tips & Tricks 47

This Instruction Manual applies to the following hardware version:
SRS3 E v. 5, September 2015

SRS3 E

2 output mechanical relays 230VAC
1 PWM/0-10V output for high efficiency pumps

4 inputs for Pt1000 temperature sensors

3

Safety Instructions

A.1 EC Declaration of Conformity

The manufacturer declares that a Declaration of Conformity has been issued for the
SRS3 T Solar Controller, it is marked with the CE mark and conforms to the following
relevant safety regulations:

- Directive 2014/35/EU - EC low voltage directive

- Directive 2014/30/EU - EC electromagnetic compatibility directive

A.2 General information

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 before installing,
commissioning and operating the unit. The installation shall be done in compliance
with valid standards and rules. The controller does not under any circumstances

replace any safety devices (e.g. safety valve, air vent valve etc.) to be installed into

a solar circuit! Installation of the unit may only be carried out by a specialist who is
trained on the required level.
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. Any changes to the controller or tampering with may pose a risk to
safe operation of the appliance and to the complete solar thermal system.

- please read carefully!

A.3 Explanation of symbols

Failure to observe these instructions can result in danger to life from

Danger

Danger

electric voltage.

Failure to observe these instructions can result in serious damage to
health such as scalding, or even life-threatening injuries.

4

Warning

Caution

Failure to observe these instructions can result in destruction of the unit
or the system, or damage to the environment.

Information especially important for the function and optimal use of the
unit and the system.

Safety Instructions

A.4 Changes to the unit

• Changes, additions to or conversion of the unit are not permitted without a written
permission from the Manufacturer.

• It is forbidden to install any additional components into the controller that has not
been tested together with the controller.

• The controller shall not be used after an accident when its functions may have been
affected – e.g. after a fire. The controller shall be switched off immediately.

• Use original spare parts only.

• Marking of the Manufacturer and Distributor shall not be altered or removed.

• All adjustments shall be done in compliance with this Guide.

A.5 Warranty

The controller has been manufactured and tested with regard to high quality and
safety requirements. The unit is subject to the statutory guarantee period of two years
from the date of sale.

The warranty and liability shall not include, however, any injury to persons or material
damage that is attributable to one or more of the following causes:

- Failure to observe these installation and operating instructions

- Improper installation, commissioning, maintenance and operation

- Improperly executed repairs

- Unauthorised structural changes to the unit

- Installation of additional components that have not been tested

together with the unit

- Any damage resulting from continued use of the unit despite an obvious defect

- Failure to use original spare parts and accessories

- Use of the device for other than its intended purpose

- Operation above or below the limit values listed in the specications

- Force majeure

5

Description

B.1 Specification

Electric specification:

Volt ag e 230VAC +/- 10%
Mains frequency 50 - 60Hz

Power consumption 0,5W - 2,5W

Internal fuse T2A / 250V slow blow

IP rating IP40
El. protection class II
Overvoltage category II
Pollution degree II

SRS3 E

Mechanical relay, 460VA (AC1), 460W /AC3) 2 (R1/R2)

0-10V output, 10% tolerance, 10 kΩ, or PWM output, 1kHz, 10V 1 (V1)

Pt1000 sensors, from -40 °C to +300 °C 4 (S1 - S4)

Network connection CAN Bus

Permissible cable length of sensors and accessories:

Collector and outdoor temp. sensors <30 m
other Pt1000 sensors <10 m

PWM / 0...10V <3 m

Mechanical relay <10 m

Clock backup period 24 hod

Permissible ambient conditions:

Ambient temperature:
for controller operation 0°C - 40 °C

for transport/storage 0°C - 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 3-part, ABS plastic
Installation methods wall installation, optionally panel installation

Overall dimensions 163x110x52 mm
Installation aperture dimensions 157x106x31 mm
Display fully graphic display, 128 x 64
LED multicolour red/green

Operation 4 entry keys

B.2 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

6

Description

B.3 Description

SRS3 Controller is designed for automatic control of solar thermal systems. The SRS3
E model is intended to control solar systems with up to 2 independent solar arrays and
one or two solar consumers. The solar consumer can be a hot water storage tank,
a heat exchanger for a swimming pool, and a thermal store for heating. All hydraulic
variants are described in Chapter D.1.

- both graphics and texts on a backlit display

- simple viewing of the current measurement values

- approximate solar heat measurement

- analysis and monitoring of the system also by means of statistical graphics

- extensive setting menus with explanations

- menu lock can be activated to prevent unintentional setting changes

- usual preset parameters in factory setting

- further measurement and switching applications using a temperature difference and

a thermostat function

B.4 Scope of supply

- SRS3 E Controller

- 3 screws 3.5 × 35 mm and 3 dowels 6 mm diam. for wall installation

- 6 strain relief clips with 12 screws

- replacement fuse T2A/250V

- 3 Pt1000 temperature sensors

B.5 Disposal

IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE WITH THE

EUROPEAN DIRECTIVE 2002/96/ES

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

7

C.1 Wall installation

Install the controller in dry areas only.

Warning

Installation

C.1.1

C.1.2

Installation instructions:

1. Unscrew cover screw completely.

2. Carefully pull the upper part of housing
from the lower part, cee Fig. C.1.1.

3. Set the upper part of the 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. TMark the position on the wall with a

pencil. Using a drill and size 6 bit, drill 3

holes at the points marked on the wall and
push in the plugs. Fig. C 1.2.

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.

8

C.2 Electrical Wiring

Before working on the unit, switch off the power supply and secure
it against being switched on again! Check for the absence of power!

Danger

Warning

Warning

Warning

Electric wiring may only be done by a specialist in compliance with valid
rules. Do not use the controller if its case shows visible damage.

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 and relay
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.

Installation

9

Installation

C.2.1

C.2.2

C 2. 1 Wiring instructions:

1. Select the necessary hydraulic variant

(D.1 - Hydraulic variants).

2. Open the controller as described in C.1.

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 (Fig. C.2.1).

4. Open the terminals using a flat

screwdriver (Fig. C.2.1.) and wire the leads

following the diagram.

5. Refit the upper housing part and fasten
with screw.

6. Switch on mains voltage and place cont­roller in operation.

Instructions for clamps:

1. Insert screwdriver into the upper hole. Push the lock
clamp inside down. Keep the screwdriver in this position.

2. Insert the stripped cable into the lower opening.

3. Remove screwdriver. The clamp will lock the cable.

C.3 Installing the temperature sensors

The controller operates with Pt1000 temperature sensors.

Max. sensor lead length for S1 and S5 is 30 m and its cross section at least

0.75 mm2. Max. sensor lead length for S2 to S4 is 10 m and its cross section at least

0.75 mm2. Make sure there is no contact resistance in the wiring!

Caution

Warning

Warning

10

Select the proper location for the sensor where it feels the right temperature.
Use only immersion sensors. Pipe-mounted sensors only in exceptional cases.
Make sure that the terminals of extension cables and sensors are properly tightened.

The temperature sensor cables must be routed separately from mains voltage cables!

When connecting high efficiency pumps with PWM, it is necessary to respect the

right wiring (i.e. the terminal “PWM out” on the controller with “PWM in” on the
pump, and “GND” on the controller with “GND” on the pump).

D. - Terminal block wiring

Installation

Sensor connection

Warning

S4

– max. 12V

S4

-

V1

VFS2

S3 S2 S2 S1

S3

VFS1CAN CAN

On the controller board:

CAN1 CAN Bus connection
CAN2 CAN Bus connection

Sensor connection

Warning

– max. 12V

Extra low voltage, max. 12V– sensors

Terminal: connection for:
S1 sensor 1
S1 sensor 1 (GND)
S2 sensor 2
S2 sensor 2 (GND)
S3 sensor 3
S3 sensor 3 (GND)
V1 0-10V/PWM output for high
efficiency pumps

- output for 0-10V gnd. / PWM for
high efficiency pumps
S4 sensor 4
S4 sensor 4 (GND)

Mains voltage
230V

Danger

S1

PELV

N

R2 L N R1 N

Mains voltage
230V

Danger

Mains voltage 230V 50Hz

Terminal: connection for:

N neutral N

R1 relay R1

N neutral N
L mains phase L
N neutral N

R2 relay R2

PE protective conductor (green-yellow)

11

D.1 Hydraulic variants

ΔT

ΔT

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

devices under any circumstances. Depending on the specic application, additional system

Warning

components and safety components may be mandatory, such as check valves, safety
temperature limiters, scalding protectors etc., and must therefore be provided.

Description

S1

R1( V1)

S2

Solar wit h hot water storag e tank Solar wit h pool

S2

S1

R1( V1)

Heat tran sfer between h ot water storage
tanks

Universal ΔT Shuto valve

Solar with heating circuit

S1

S1

S2

R1( V1)

S1

R2

R1( V1)

S2

S2

R1( V1)

Solid fu el boiler with hot w ater storage tan k

S1

S1

S2

R2

Thermostat

S2

R1( V1)

Solar wit h pool and heat exc hanger

S2

S1

S4

S1

R2

R1( V1)

S2

Solar with thermostat (auxiliary heating)

12

S3

S1

R1( V1)

S2

R2

S3

Solar with thermally stratied storage tank

S1

R1( V1)

S2

Solar with heating circuit

S3

S4

R2

Hydraulic variants

Description

R1( V1)

S1

R2

S4

S2

R2

S1

S2

S1

S3

S4

R2

R1( V1)

2 East/ West solar array s and 3-way valve

R1( V1)

pumps

S2

R1( V1)

Solar wit h thermostat an d 3-way valve

S1

S2

R2

S1

S2

S4

S1

S2

S3

S3

R2

S1

S3

R1( V1)

Solar wit h bypass

R1( V1)

2 East/ West solar array s and 2 pumps Solar wit h 2 hot water storag e tanks and 2

R1( V1)

Solar wit h heat exchange be tween hot
water storage tanks

R2

R2

S2

S1

S2

S1

S2

S4

S4

S3

R2

R1( V1)

Solar with heat exchanger

R2

Solar wit h 2 hot water storag e tanks and
3-way val ve

R1( V1)

Solar wit h pool and heat exc hanger

S1

R1( V1)

S2

R2

Solar wit h hot water storag e tank and
solid fu el boiler

R2

S3

R1( V1)

S2

Solar wit h cooling 1 (collec tor cooling)

S1

S1

❄

S2

R2

R1( V1)

Solar wit h cooling 2 (collec tor cooling)

13

Hydraulic variants

Description

S1

S3

R1( V1)

Solar wit h cooling 3 (collec tor cooling)

pump

valve

S2

R2

3-way
valve R2 on

sensor

E.1 Display and input

(2)

(1)

(3)

(4)

Examples of display symbols:

pump (rotates in operation)
valve (direction of flow black)

collector

hot water storage tank

swimming pool

temperature sensor

heat exchanger

load pause

warning/error message

new information available

S1

R1( V1)

Solar wit h hot water storag e tank and solid fue l
boiler an d S4

solid
fuel
boiler

S4

S2

R2

collector

radiator

fan

Operation

The display (1) shows graphic and text info on

the hydraulic variant, set and measured values
and other text info.

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 (3+4), which

are assigned to different functions depending
on the situation.

The ”esc” key (3) is used to cancel an entry or

to exit a menu.
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
selection and confirmation function.

Examples of key functions:

+/- = increase/decrease values
▼/▲ = scroll menu down/up
YES/NO = approve/reject
Info = additional information
Back = to previous screen
ok = confirm selection
Confirm = confirm setting

S3

R1( V1)

2 East/ West solar array s

heat
exchanger

pool

hot water
storage
tank

S4

R2

S3

auxiliary
heating

ow
heater

S1

S2

14

Operation

E.2 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 Setup wizard or
not. The Setup wizard can also be terminated or called
up again at any time in the special functions menu.
The Setup wizard 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 Setup wizard. Finally, menu 3.2 under operating mode

“Manual” should be used to test the switch outputs with the solar consumers connected, and to

check the sensor values for plausibility. Then switch on automatic mode.

E.3 Free commissioning

If you decide not to use the commissioning help, you should make the necessary settings in the
following sequence:

• Menu 9. Language

• Menu 6.11 Time and date

• Menu 6.1 Program selection

• Menu 4 Settings, all values

• Menu 5 Protective functions if modications are necessary

• Menu 6 Special functions if additional changes are necessary

Note: Setup wizard can be called up any time from the menu 6.8.

Finally, menu 3.2 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,

Caution

and check whether further settings are necessary for your application.

15

Operation

E.4 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. Measurements

2. Statistics

3. Operating mode

4. Settings

5. Protections

6. Special functions

7. Menu lock

8. Service data

9. Language

1. - Measurements

If “--” 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

Caution

16

using the function of sensor compensation - see Chapter 6.7.

Which sensors are displayed will depend on the program selected, sensors
connected and settings.

Current temperature values with explanations
Function control of the system with operating hours etc.
Automatic mode, manual mode or switch unit off
Set parameters needed for normal operation
Solar and frost protection, recooling...
Commissioning help, program selection, sensor calibration, clock etc.
Menu lock against unintentional setting changes
Diagnosis in the event of an error

Language selection

Measurements

Menu “1. Measurements” serves to display the

currently measured temperatures.
What measurement values are displayed
depends on the selected program and the
specific controller model.

The menu is closed by pressing “esc” or selec­ting “Exit measurements”.

Statistics

2. - Statistics

Menu “2. Statistics” is used for function

control and long-term monitoring of the
system.

The menu is closed by pressing “esc” or
selecting “Exit statistics”.

For analysis of the system data it is essential that time is set accurately
on the controller. Please note that the clock does not continue to run if

Caution

2.1. - Operating hours

Display of operating hours of the solar pump connected to the controller; various time

spans are available (last day, week, month, year).

the mains voltage is interrupted, and must therefore be reset. Incorrect
time set in the controller may result in data being deleted, recorded
incorrectly or overwritten.

2.2. - Heat output

Display of the approximate heat output of the solar thermal system.

2.3. - Graphic overview

This provides a clearly-organised display of the data listed under 2.1. - 2.2. as a bar

graph. Various time ranges are available for comparison. The two left-hand keys can

be used to page through the data.

2.4. - Message log

Display of the last 10 events occurring in the system with indication of date and time.

2.5. - Reset/clear

Resetting and deleting the individual analyses. The function “All statistics” clears all

statistics but not the error messages.

17

Operating modes

3. - Operating modes

In menu “3. Operating modes” the

controller can either be placed in
automatic mode, switched off, or placed in
a manual operating mode.

The menu is closed by pressing “esc” or
selecting “Exit operating modes”.

3.1. - Automatic

Automatic mode is the normal operating mode of the controller.
Only automatic mode provides proper controller function taking into account the
current temperatures and the parameters that have been set

3.2. - Manual

The relay and thus the connected pump, valve or heating rod are switched on and
off manually by pressing a key, with no regard to the current temperatures and the
parameters which have been set. The measured temperatures are also shown.

Danger

3.3. - Off

Warning

18

The manual mode is intended to be used by a technician when
commissioning or checking the system. Activating manual mode in
current operation can lead to system damage or overheating of water in
the hot water storage tank!

When the operating mode “Off” is activated, all controller functions are

switched off. This can lead, for example, to overheating of the solar
collector or other system components. The measured temperatures are
displayed even when the controller is Off.

Settings

4. - Settings

The system parameters are set in menu “4.
Settings”.

This does not under any circum-

Warning

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

Various settings can be made depending on the selection of hydraulic

variant 1-27. The following pages contain generally valid descriptions for

Caution

4.1. - Tmin S1

4.1. - Tmin S1

the settings.

Sensor S1 switch-on temperature

If this value is exceeded at sensor 1 and the other conditions are also met, then the
controller switches the associated pump and/or valve on. If the temperature at sen­sor 1 drops below this value by 5 °C, then the pump and/or the valve are switched off
again.

4.3. - Priority Storage 1

Priority of Storages

This determines the order in which the storages are charged. If the same priority is set
for 2 storages, the charging is not switched over until charging the active storage is not
possible anymore.

stances replace the safety elements
to be provided by the customer!

4.4. - ΔT1 / ΔT (pool)

Switch-on/switch-off temperature difference for solar heat:

If this temperature difference between the reference sensors is exceeded and the
other conditions are also met, then the controller switches the applicable relay on.

When the temperature drops to ΔT Off, then the relay is switched off.

If the set temperature difference is too small, this may result in ineffective
operation, depending on the system and sensor positions.Special switching

Caution

conditions apply for speed control (see 6.3. - Speed control R1)!

19

Settings

4.5. - Tmax S2

Switch-off temperature at sensor S2

If this value is exceeded at sensor 2 and the other conditions are also met, then the
controller switches the associated pump and/or valve off. If sensor 2 falls below this
value again and the other conditions are also met, then the controller switches the
pump and/or valve on again.

Temperature values which are set high will allow higher solar heat
accumulation but it shall be checked that all system components are

Danger

4.6. - Priority Storage 2

Priority of Storages S2

This determines the order, in which the storages are charged. If the same priority is set
for 2 storages, the charging is not switched over until charging the active storage is not
possible anymore.

4.7. - ΔT2

Settings see “4.4. - ΔT1”

4.8. - Tmax S3

Settings see “4.5. - Tmax S2”

resistant to high temperatures and scalding protection is provided.
Regulus solar thermal systems are safe for heating water up to 95 °C.

4.13. - Tmax pool

Switch-off temperature at pool sensor

If this value is exceeded at the applicable sensor, the controller switches the associa­ted pump and/or valve off. If the temperature falls below this value again and the other
conditions are also met, then the controller switches the pump and/or valve on again.

Temperature values that are set too high can lead to scalding or damage

Danger

20

to the system. Scalding protection must be provided by the customer!

Settings

4.14. - Tmax pool HE

Switch-off temperature at heat exchanger sensor

If this value is exceeded at the applicable sensor, the controller switches the associat­ed pump and/or valve off. If the temperature falls below this value again and the other
conditions are also met, then the controller switches the pump and/or valve on again.

Temperature values that are set too high can lead to scalding or damage to

Danger

4.15. - T priority

Temperature threshold for absolute priority. In systems with two storage tanks

charging of the lower-priority storage tank will never take place until this temperature at
sensor of the higher-priority storage tank is exceeded.

4.16. - Loading time

Interruption of charging into the lower priority storage tank. The charging of

the lower-priority storage tank is interrupted after the settable time in order to check
whether the collector has reached a temperature level that allows charging in the hi­gher-priority storage tank. If so, the priority storage tank is charged. If not, the increase
is measured, to check if charging of the priority storage tank will be possible shortly.

4.17. - Increase

Extension of the charging pause due to temperature increase in the collector.

For precise setting of the charging priorities for systems with multiple storage tanks,
the necessary temperature increase of the collector at which the interruption of the
charging into the lower-priority storage tank is extended by one minute is set here. The
interruption is extended because the temperature increase of the collector is expected

to enable charging in the higher-priority storage tank soon. As soon as ΔT conditions

are met, the priority storage tank is charged. If the rise in temperature falls below the
set value, then the charging of the lower-priority storage tank is enabled again.

the system. Scalding protection must be provided by the customer!

Caution

Some hydraulic variants (e.g. thermostat, ΔT) may contain additional
functions, their settings are described in Chap. 6.5 – Relay functions.

21

Protective functions

5. - Protective functions

Menu “5. Protections” can be used to acti­vate and set various protective functions.

This does not under any circum-

Warning

The menu is closed by pressing “esc” or
selecting “Exit protections“.

5.1. - System protection

Priority protection

Protection of the solar circuit protects its components from overheating. If “SP T on”

is exceeded at the collector for over 1 minute, the pump is switched off. The collector
is left at high temperature. The pump is activated again when the temperature drops

below “SP T off”.

The collector remains uncooled at a very high temperature. That can lead

Warning

to shorter service life of solar fluid. If you use this option, take care to check
solar fluid quality regularly.

stances replace the safety facilities
to be provided by the customer!

5.2. - Collector protection

If „CP Ton” is exceeded at the collector sensor, the pump is switched on in order to

cool the collector down. The pump turns off when the collector temperature drops be-

low „CP Toff” or the temperature “Storage (X) maximum” is exceeded in the storage

or pool. In systems with 2 storage tanks only the lower-priority tank or pool is used for
collector cooling.

When this function is active, a storage tank or swimming pool may get

heated up to “Storage (X) maximum”, over Tmax S2 (see 4.2. - Tmax S)

Danger

which might cause damage to the system. When only a pool is heated, it
is not used to cool down solar collectors.

22

Protective functions

Protective functions

5.3. - Recooling

At the end of a sunny day the temperature in a storage tank may easily reach high
values. In order to prevent further temperature increase the next day, excess energy
can be released into the air via collectors under cloudy conditions or after sunset. If

the temperature in the storage tank exceeds the value “Recool Tsetpoint” and the

collector is at least by 20 °C cooler than the storage tank, the solar pump starts. The

storage tank is then cooled down until the “Recool Tsetpoint” is reached. In systems

with two storage tanks the setting applies to both the storage tanks.

This function enables to release excess heat from the storage tank con­siderately and without solar fluid overheating, via piping and collectors

Caution

5.4. - Frost protection

A two-stage frost protection function is available. In stage 1 the controller switches
the pump on for 1 minute every hour if the collector temperature drops below the set

value “Frost level 1”. If the collector temperature drops further to the set value “Frost
level 2”, the controller switches the pump on continuously. If the collector temperature
then exceeds the value “Frost level 2” by 2 °C, then the pump switches off again.

Caution

into the ambient air. It is recommended to keep activated.

This function enables to release excess heat from the storage tank consi­derately and without solar fluid overheating, via piping and collectors into
the ambient air. It is recommended to keep activated.

5.5. - Seizing protection

Protection against pump seizing by regular short running of a pump or a valve. Seizing may
occur after longer inactivity of valves or pumps. If the seizing protection is activated, the contro­ller switches the relay in question and the connected solar consumer on every day at 12:00 or

weekly on Sundays at 12:00 (setting “weekly”) for 5 seconds in order to prevent the pump and/

or the valve from sticking after an extended stationary period.

5.6. - Collector alarm

If this temperature is exceeded at the collector sensor when the solar pump is on, a
warning or error message is triggered. A warning message is shown on the display.

23

Special functions

6. - Special functions

Menu “6. Special functions” is used to set basic

items and expanded functions.

Time and Date is the only function to

Warning

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

6.1. - Program selection

The suitable hydraulic variant for the specific application is selected and set here (see
Chap. D.1 Hydraulic variant). The associated diagram is displayed on pressing “info”.

Normally the program selection is made only once during initial com-

missioning by the specialist. Incorrect program selection can lead to

Caution

unpredictable errors.

If the program is changed, the settings revert to factory settings.

Caution

be set by the user. Other functions
may be set by a specialist only.

6.2. - Pump settings V1

This menu contains the settings for the speed controlled output V1.

6.2.1. - Type of signal

The type of speed controlled pump must be entered here.

0-10V: Speed control of a high efficiency pump by 0-10V signal.
PWM: Speed control of a high efficiency pump by PWM signal.

For control of standard pumps, no settings are needed in this

Caution

menu. Just connect the pump’s power supply cable to R1.

6.2.2. - Pump profile

Selection from preset pump control profiles. The setting can be done manually as well.
Parameters may be changed manually even when a preset profile is set.

24

Special functions

6.2.3. - Output Signal

This menu determines the type of pump used: Solar pumps perform at their highest
power when the signal is also at its maximum, heating pump on the other hand are set

to highest power when the control signal is at its minimum. Solar = normal, heating =

Inverted.

6.2.4. - 0-10V / PWM off

This signal is put out when the pump is switched off (pumps that can detect cable

break need a minimum voltage).

6.2.5. - 0-10V / PWM on

This signal is needed to turn the pump on at minimum speed.

6.2.6. - 0-10V / PWM max

This determines the output voltage for the maximum performace of the pump that is
used e.g. during purging or manual operation.

6.2.7. - Show signal

Displays the set signal in text and a graphical diagram.

25

Special functions

6.3. - Speed control

With speed control the SRS3 E makes it possible to vary the speed of connected pumps.

This function should only be activated by a specialist. Depending on the
pump and pump stage used, the minimum speed should not be set too
low, because otherwise the pump or the system may be damaged. The

Warning

6.3.1. - Modes

The following speed variants are available here:
Off: There is no speed control. The connected pump is only switched on or off with full
speed.

M1: Control set to ΔT, starting from max. speed:

After the purging time the controller switches to the set max. speed. If the temperature

difference ΔT between the reference sensors (collector and storage tank) is less than

the set value, then the speed is decreased by one stage after the Sweep time elapses.
If the temperature difference between the reference sensors is greater than the set
value, then the speed is increased by one stage after the Sweep time elapses. If the

controller has adjusted the speed of the pump down to the smallest stage and the ΔT
between the reference sensors is less than ΔT off, the pump is switched off.
M2: Control set to ΔT, starting from min. speed:

After the purging time the controller switches to the set min. speed. If the temperature

difference ΔT between the reference sensors (collector and storage tank) is greater

than the set value, then the speed is increased by one stage after the Sweep time
elapses. If the temperature difference between the reference sensors is less than the
set value, then the speed is decreased by one stage after the Sweep time elapses. If
the controller has adjusted the speed of the pump down to the smallest stage and the

ΔT between the reference sensors is below TΔoff, the pump is switched off.

M3: Control to constant collector temperature, starting from min. speed:
The pump starts at max. speed. After the purging time the controller switches to the

set min. speed. If the temperature at the collector sensor (or relay R2 in variants with a

heat exchanger) is greater than the Setpoint, then the speed is increased. If the tempe­rature at the collector sensor is less than the Setpoint, then the speed is decreased.
M4: If the storage tank of the highest priority is heated to the desired temperature, then
the speed control works by variant M3. If the (secondary) storage tank of a lower priori­ty is heated to the desired temperature, then the speed control works by variant M2.

information provided by the relevant manufacturer must also be observed!
If in doubt, the min. speed and the pump stage should generally be set to
high rather than too low.

26

Special functions

6.3.2. - Purging time

During this time the pump runs at its full speed (100 %) to ensure reliable starting. Only

after this purging time does the pump run with speed control and switches to the max.

or min. speed, depending on the variant set (M1-M4). Purging is not used for PWM/
0-10V output.

6.3.3. - Sweep time

In the process of speed control a certain delay before any speed change is needed in
order to avoid quick speed changes and subsequent large temperature oscillations.
The meaning of the parameter is described above.

6.3.4. - Max. speed

The maximum speed of the pump is specified here. During the setting the pump runs
at the specified speed and the flow rate can be determined.

The indicated percentages are guide values that may vary to a greater or

Caution

6.3.5. - Min. speed

The minimum speed of the pump at relay R1 is specified here.

lesser extent depending on the system, pump and pump stage.

The minimum speed of the pump at relay R1 is specified here. The indi­cated percentages are guide values that may vary to a greater or lesser

Caution

extent depending on the system, pump and pump stage. 100% is the

maximum possible voltage/frequency of the controller.

6.3.6. - Setpoint

This value is the control setpoint for variant M3 (see Chap. 6.3.1). If the value at the

collector sensor drops below the Setpoint, the speed is reduced. If it rises above the
Setpoint, the speed is increased.

6.3.7. - Set ΔT

This value is the selectable temperature difference for modes M1 and M2 (see 6.3.1

- Modes). Below this ΔT value between the reference sensors, the speed is reduced.

When above this value, the speed is increased.

27

Special functions

6.5. - Relay functions

The here explained additional functions can be assigned to unused relays. Every addi­tional function can only be used once. Pay special attention to the technical data of the

relays („B.1. - Specication“).

Example

Solar +

Solar +

Solar +

Solar with storage and additional
Solar Bypass function

Solar with heat exchanger and addi­tional Return Flow Increase function

Solar with heat exchanger and ad­ditional Solid Fuel Boiler function

Numbering does not have to correspond to the numbering in the contro-

Caution

ller menu.

6.5.1. - Solar bypass
Use the relay to switch a bypass valve or a bypass pump.

This can direct the flow pass the storage, when the flow temperature at the bypass
sensor is lower than the storage that has to be charged.

6.5.1.2. - Variant

This menu determines whether a pump or valve is used to direct the flow through the
bypass.

6.5.1.3. - Bypass (sensor)

The flow sensor for the bypass function is selected in this menu. Do not install in the
return line.

28

Special functions

6.5.2. - Thermostat

Thermostat is used for time- and temperature controlled auxiliary heating.

Temperature values which are set too high can lead to scalding or

Warning

Caution

6.5.2.2. - Target temperature (TH TSet)

Target temperature at thermostat sensor 1. Below this temperature, auxiliary

heating is switched on, until TH set + hysteresis is reached.

6.5.2.3. - Hystereze (Term. hyster.)

Hysteresis (TH hysteresis)

6.5.2.4. - Thermostat (sensor)

T set is measured with thermostat sensor 1.
When thermostat sensor 2 is connected, the relay switches on when T set is

not reached at thermostat Sensor 1, and switches off when T set + hysteresis

Relay functions

at thermostat sensor 2 is exceeded.

6.5.2.5. - Thermostat 2 (sensor)

Optional switch off sensor

When T set + hysteresis is exceeded at the optional thermostat sensor 2, the

relay is switched off.

damage to the system. Scalding protection must be provided by the
customer!

In Energy savings mode, different settings may apply, see e.g. T eco.

6.5.2.6. - T eco

For Energy saving mode
When Energy saving mode is active: During solar charge T eco is used instead
of TH set. When the temperature drops below T eco at thermostat sensor 1,

the relay is switched on and heats up to T eco + hysteresis.

6.5.2.7. - Storage

For Energy saving mode

Loading this storage activates the Energy saving mode When this storage is

charge by solar, additional heating is only switched on when the temperature is
below T eco.

29

Special functions

6.5.2.8. - Energy saving mode

Energy saving mode switches the heating on when T eco is not reached and

heats up to T eco + hysteresis when solar charge is active.

6.5.2.9. - Periods

Thermostat activity times

Set the desired periods of time when the thermostat should be active. 3 periods
can be set per day, settings can also be copied to other days. Outside the set
times the thermostat is switched off.

6.5.3. - Cooling

This is used to cool down e.g. storages to a setpoint temperature by radiating
heat.

6.5.3.2. - Desired temperature (Co T set)

Target temperature at the cooling sensor. Cooling is on above this temperatu-

re till Co T set + hysteresis is reached.

6.5.3.3. - Co hysteresis

If the temperature at the cooling sensor drops below Co T set + hysteresis,

the relay is switched off.

6.5.3.4. - Cooling (sensor)

Relay functions

Reference sensor of the cooling function.

30

6.5.3.5. - Periods

Cooling activity times

Set the desired periods of time when the cooling should be active. 3 periods
can be set per day, settings can also be copied to other days. Outside the set
times the cooling function is switched off.

6.5.4. - Return flow increase

This function is used to increase the temperature of e.g. the return flow by the
storage.

6.5.4.2. - Return flow max. temperature (RF Tmax)

Maximum temperature at the return flow sensor. If this temperature is excee­ded, the relay is switched off.

Special functions

6.5.4.3. - ∆T return ow

Switch-on temperature difference:
When this difference is exceeded between return flow sensor and storage sen­sor, the relay is switched on.
Switch-off temperature difference:
When this difference is exceeded between return flow sensor and storage sen­sor, the relay is switched off.

6.5.4.4. - Return ow (sensor)

Determines the sensor for return flow increase.

6.5.4.5. - Storage (sensor)

Determines the storage sensor.

6.5.5. - Collector cooling

This function controls an external coolig unit to cool down the collector.

6.5.5.2. - Max. temperature (Tmax coll.)

If this temperature is exceeded at the reference sensor, the relay is switched on.

6.5.5.3. - Switch off difference (Hys min)

Relay functions

When the temperature falls below Tmax coll. +Hys min, the relay is switched off.

6.5.5.4. - Max. difference (Hys max)

To protect the cooling unit itself from damage, the relay is switched off as soon

as the temperature at the reference sensor reaches Tmax coll. + Hys max

6.5.5.5. - Collector cooling sensor

Reference sensor of the collector cooling function.

This function does not activate the solar pump to cool the collec-

Warning

tor. Therefore, please refer to the collector protection.

31

Special functions

6.5.6. - Anti Legionella

This function is used to heat up the system during selected periods to eliminate
legionella bacteria.

6.5.6.2. - Anti Legionella set temperature (AL T set)

This temperature has to be detected for the time set in AL residence time at the
AL sensors for a successful heat up.

6.5.6.3. - AL residence time

This determines the time span for which the AL T set temperature must be de­tected for a successful AL heat up.

6.5.6.4. - Last AL heat

This displays the date and time of the last successful heat up.

6.5.6.5. - AL sensor 1

This temperature is used to measure the AL temperature.

6.5.6.6. - AL sensor 2

Optional AL sensor

When a second sensor is connected, both sensors must reach and hold the set­point temperature for the residence time for a successful heat up.

32

6.5.6.7. - AL-times

Relay functions

During this periods the AL heat up is attempted.

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

Warning

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 external control units.

The anti-Legionella function is switched off at delivery.
Whenever heating-up has been carried out with the anti-Legionella

Caution

function switched on, an information message with the date appears
on the display.

During the anti-Legionella function the storage tank is heated up
over the set value “Tmax S(X)”, which can lead to scalding and

Danger

damage to the system.

Special functions

6.5.7. - Heat transfer

This is used to transfer energy from one storage to another with a pump.

6.5.7.2. - Min. temperature (Shift Tmin)

Minimum temperature in source storage to enable the heat transfer.

6.5.7.3. - Temperature difference for heat transfer (Δ T Heat transfer)

Temperature difference for heat transfer function.

When the temperature difference between HT Source and HT Drain reaches ΔT

Heat Transfer On, the relay is switched on. As soon as the difference drops to

ΔT Heat Transfer Off, the relay is switched off again.

6.5.7.4. - Setpoint (Př.tep. Tnast.)

Setpointtemperature of the target storage

When this temperature is detected in the target storage, heat transfer is
switched off.

6.5.7.5. - HT Source (sensor)

This menu determines the sensor placed in the source storage.

6.5.7.6. - HT Drain (Target sensor)

This determines the sensor placed in the storage that is receiving energy from

Relay functions

the source storage.

33

Special functions

6.5.8. - Difference

The relay is switched on when a specific temperature difference (Δ T) is

reached.

6.5.8.2. - Diff Tmin

Minimum temperature at source sensor to enable the difference relay.

When the temperature at the source sensor is below this level, the difference
function is disabled.

6.5.8.3. - Δ T difference

Switch-on difference:

When this temperature difference is reached, the relay is switched on.

Switch-off difference:

When the temperature difference drops below this value, the relay is switched off.

6.5.8.4. - DF Tmax

Maximum temperature at target sensor to enable difference function

If the temperature at the target sensor exceeds this value, difference function is
disabled.

34

6.5.8.5. - DF source (sensor)

Heat source sensor for Difference function.

Relay functions

This determines the sensor for the heat source.

6.5.8.6. - DF Drain (sensor)

Drain sensor / Target sensor for difference function

This determines the sensor for the target storage.

Special functions

6.5.9. - Solid fuel boiler

The relay is used to control an additional solid fuel boiler.

6.5.9.2. - Min. solid fuel boiler temperature (SF Tmin)

Minimum temperature in the solid fuel boiler to switch on the pump. If the tem­perature at the boiler sensor is below this temperature, the relay is disabled.

6.5.9.3. - Temper. difference for solid fuel boiler (Δ T Solid fuel)

Switch on and Switch off condition for the temperature difference between boiler

and storage. Switch on difference Δ T SF. Switch off temperature difference
Δ T SFoff.

6.5.9.4. - Max. storage temperature (SF Tmax)

Maximum temperature in the storage. If this is exceeded, the relay is switched
off.

6.5.9.5. - Boiler sensor

This determines the sensor used as boiler sensor.

6.5.9.6. - Storage sensor

This determines the sensor that is used as storage sensor.

Relay functions

6.5.10. - Error message

The relay is switched on when one or more protective functions are active. This
function can be inverted, so that the relay is always on and switches off when a
protective function is shown.

Collector protection, System protection, Frost protection, Recooling,
Anti-legionella protection, Messages, Collector alarm

6.5.11. - Booster pump

Additional pump that fills the system at the start of every solar charge.

6.5.11.2. - Filling time
Time the pump is switched on

This setting determines the length of time the pump is switched on at the start
of a solar charge.

35

Special functions

6.5.12. - SParallel operation R (X)

The relay is switched on at the same time as the set relay R1 or R2.

6.5.12.2. - Delay

This menu determines how long after the start of R1 or R2 the parallel relay is
switched on.

6.5.12.3. - Followup time

This menu determines how long after the switch off of R1 or R2 the parallel
relay is switched off.

6.5.13. - Always on

Relay is always switched on.

36

6.5.14. - Heating circuit

Relay functions

Heat circuit pump is controlled with a fixed hysteresis of (+/-1 °C for setpoint

temperature). 30 seconds Switch on and Switch off delay is fixed setting to
prevent unnecessary switching of the pump. RC21 room controller can be used
as room temperature sensor.

6.5.14.2. - Desired temperature - day (Room set day)

Room reference temperature in day mode. If this temperature is exceeded at
the room temperature sensor at the set times, the relay is switched off.

6.5.14.3. - Desired temperature - night (Room set night)

Room reference temperature in night mode. If this temperature is exceeded at
the room temperature sensor at the set times, the relay is switched off.

6.5.14.4. - Room sensor

This menu determines the sensor for the room temperature.

6.5.14.5. - Periods

Set the desired periods of time when the heat circuit day mode should be
active. 3 periods can be set per day, settings can also be copied to other days.
Outside the set times the heating function is working in night mode.

Special functions

6.6. - Heat quantity

6.6.1. - Flow rate

When the heat meter mode „Flow rate“ is selected, an approximate heat quantity is

calculated using the values the user has to enter. These are type of glycol/AntiFreeze,
glycol portion and flow rate. These values are put into correlation with the temperature

data of collector sensor and storage sensor. If necessary a correction value for ΔT can

be set: Since for the heat meter the collector and the storage temperature are used,
a difference to the flow respectively return flow temperature can be compensated by

changing Offset ΔT accordingly.

Example:

Displayed collector temp. 40 °C, measured flow temperature 39 °C, displayed storage
temperature 30 °C, measured return temperature 31 °C = results in a correction value

of -20% (displayed ΔT 10 K, real ΔT 8 K = -20 % correction)

The heat quantity measured in the mode “Flow rate” is a calculated

Caution

6.6.2. - Flow sensor

This determines the sensor that is used to measure the flow temperature.

6.6.3. - Return sensor

This determines the sensor that is used to measure the return temperature.

approximation for function control of the system.

6.6.4. - Antifreeze type

Set the type of antifreeze used. If none is used, please set to 0.

6.6.5. - Glycole percentage

The amount of antifreeze agent in the system.

6.6.6. - Flow rate

Flow rate that is used to calculate the heat quantity

This determines the flow rate in litres per minute that is used for the calculation of the
heat quantity.

6.6.7. - Offset ∆ T

Correction value for temperature difference

Since for the heat meter the collector and the storage temperature are used, a diffe­rence to the flow respectively return flow temperature can be compensated by chan-

ging Offset ΔT accordingly.

Example:

Displayed collector temp. 40 °C, measured flow temperature 39 °C, displayed storage
temperature 30 °C, measured return temperature 31 °C = results in a correction value

of -20 % (displayed ΔT 10 K, real ΔT 8 K = -20 % correction).

37

Special functions

6.7. - 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 0.8 °C (tempera­ture) resp. 0.2 % of the measuring range of the VFS / RPS sensor (flow rate / pressure)

per step.

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

Caution

6.8. - Commissioning

Starting the commissioning help guides you in the correct order through the basic
settings necessary for commissioning, and provides brief descriptions of each parame-

ter 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 to the selection mode, thus cancelling the commissioning

help (see also E.2)..

Caution

unpredictable errors.

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.

6.9. - Factory settings

All of the settings that have been made can be reset, thus returning the controller to its
delivery state.

The entire parametrisation, analyses, etc. of the controller will be lost

Caution

irrevocably. The controller must then be commissioned once again.

6.10. - Start aid function

With some solar systems, especially with evacuated tube collectors, it may occur that
the measurement value acquisition at the collector sensor occurs too slowly or too ina­ccurately because the sensor is often not at the hottest location. When the start help is
activated the following sequence is carried out: If the temperature at the collector sen-

sor increases by the value specified under “Increase” within one minute, then the solar
pump is switched on for the set “Purging time” so that the medium to be measured

can be moved to the collector sensor. If this still does not result in a normal switch-on
condition, then the start help function is subject to a 5-minute lockout time.

This function should only be activated by a specialist if problems arise with
acquisition of measurement values. In particular follow the instructions from

Caution

38

the collector manufacturer.

Special functions

6.11. - Time and date

This menu is used to set the current time and date.

For analysis of the system data it is essential for the time to be set accurate­ly on the controller. Please note that the clock does not continue to run if the

Caution

6.12. - Daylight saving time

When this function is active, the controller’s clock changes automatically to and from

DST (Daylight Saving Time).

6.13. - Eco display mode

When active, the display backlight is switched off after 2 minutes of inactivity.

mains voltage is interrupted, and must therefore be reset.

Caution

6.14. - Temperature unit

This menu is used to select the temperature unit that is displayed.

6.15. - Network

In this menu, the settings of the ethernet connection of the datalogger are set.

6.15.1. - Access Control

In this menu you can add or remove four users who should have access to the datalogger.
To add a user in the list, select <add user>. The list shows you the last 5 users that tried
to connect to the datalogger. Select a user with OK to grant him access. To revoke access
again choose one of the 4 users from your list and choose <remove user>.

6.15.2. - Ethernet

In this menu, the settings of the ethernet connection of the datalogger can be set.

6.15.2.1. - Ethernet

Activate or deactivate the ethernet function.

6.15.2.2. - MAC Adress

Displays the individual MAC address of the datalogger.

6.15.2.3. - Auto-Configuration (DHCP)

If activated, the datalogger requests IP addresses and network parameters from a DHCP
server.

6.15.2.4. - IP Address

In this menu, the IP address of the datalogger can be set.

6.15.2.5. - Subnet

In this menu the subnet mask of the datalogger can be set.

6.15.2.6. - Gateway

In this menu, the IP of the gateway for the datalogger can be set.

6.15.2.7. - DNS Server

In this menu, the IP address of the DNS server can be set.

39

If a message is waiting, the backlight is not switched off.

Menu lock

7. - Menu lock

Menu “7. 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:

1. Measurements

2. Statistics

3. Operating modes

6.11 Time and Date

7. Menu lock

8. Service values

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

40

Service values

8. - Service values

The menu “8. Service values” can be used for remote diagnosis by a specialist or the

manufacturer in the event of an error, etc.

Enter the values at the time when the error occured e.g. in the table.

Caution

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

8.1 8.31

8.2 8.32

8.3 8.33

8.4 8.34

8.5 8.35

8.6 8.36

8.7 8.37

8.8 8.38

8.9 8.39

8.10 8.40

8.11 8.41

8.12 8.42

8.13 8.43

8.14 8.44

8.15 8.45

8.16 8.46

8.17 8.47

8.18 8.48

8.19 8.49

8.20 8.50

8.21 8 .51

8.22 8.52

8.23 8.53

8.24 8.54

8.25 8.55

8.26 8.56

8.27 8.57

8.28 8.58

8.29 8.59

8.30 8.60

41

9. - Language

Language

Menu “9. Language” can be used to select

the language for the menu guidance. This is
queried automatically during initial commis­sioning.

42

Malfunctions, additional info

Z.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

(LED flashes + warning

symbol)

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. B.2)

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

Danger

yourself. Consult a specialist in
the event of an error!

Collector alarm Means that the collector temperature has exceeded

the temperature set under menu 5.6

Restart Means that the controller was restarted, for example

due to a power failure. Check the date&time!

Time & Date This message appears automatically after a mains

failure because the time & date have to be checked,
and reset if necessary.

No ow! This is displayed when ΔT between storage and

collector is 50 °C or higher for 5 minutes without
interruption.

Frequent on / off A relay was switched on and off more than 5 times

within 5 minutes.

AL failed This is displayed when AL ref -5 °C was not meas-

ured for the set Al residence time at the AL sensor.

43

Malfunctions, additional info

Z.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

Danger

Danger

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.

Z.2.1

Fuse

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, disco­nnect the device, open it, remove the old
fuse and check it. If it is defective, replace
it with a new one, locate the external sou-

rce of the error (e.g. pump) and replace

it. Then first re-commission the contro­ller and check the function of the switch
outputs in manual mode as described in
Chap. 3.2.

44

Malfunctions, additional info

Z.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 speci-

Caution

Performing maintenance:

- Assess/check plausibility of analyses (see Chap. 6.11)

- Assess/check plausibility of analyses (see Chap. 2)

- Check the error log (see Chap. 2.4.)

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

- Check the switch outputs/consumers in manual mode (see Chap. 3.2)

- Possibly optimise the parameter settings

alist and have the settings optimised if necessary.

45

Malfunctions, additional info

Controller 1 Controller 2 Controller 3 Controller n

Datalogger (optional)

Z.4 CAN Bus

The CAN bus can be used to connect two or more controllers with each other or with the

datalogger to exchange data.

(3)

(1) (1) (1)

(2)

(1)

1. The controllers are connected in series with the CAN bus cable (1).

2. The first and last controller/data logger in this connection series must be fitted with

a terminating resistor (2).

The wiring of the two CAN sockets is optional.

3. Optionally, the data logger (3) can be integrated in a CAN bus.

The available CAN functions are subject to the controller type as well as the software

version used and can be seen in the corresponding manual.

(2)

46

Tips & Tricks

Instead of setting the flow rate for the system using a flow rate limiter, it is better to

adjust the flow rate using the switch on the pump and by means of the “max. speed”
setting on the controller (see 6.3.4). This saves electricity!

The service values (see 8.) include not only current measurement values and operating

states, but also all of the settings for the controller. Write the service values down just
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. Write the service va-

lues down (see 8.) 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 a specialist.

In the hydraulic variant with pool the charging of the pool, e.g. for winter operation, can

be switched off using a simple function. To do this, simply press and hold the “esc” key

down for several seconds on the diagram/overview screen. A message appears on the
display as soon as the pool is switched off or when the pool is switched on again.

The Operating hours displayed in the “Statistics” menu are solar operating hours. This

therefore only takes into account hours in which the solar pump is active. In the univer­sal programs the times refer to relay R1.

It is recommended to record any statistics and data that are particularly important to
you at regular intervals.

47

04/2017

REGULUS spol. s r.o.

Do Koutů 1897/3 http://www.regulus.eu

143 00 Praha 4 E-mail: [email protected]