Regulus SRS3 E User manual

REGULUS SRS3 E Controller
EN
v. 1.2
Installation, Wiring and Operation Instructions

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 Description 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. - Measurements 16
2. - Statistics 17
2.1. - Operating hours 17
2.2. - Heat output 17
2.3. - Graphic overview 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. - Off 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 Off 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 34
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. - Service 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
CONTENTS

3
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

4
Safety Instructions
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.1 EC Declaration of Conformity
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.
A.2 General information
Danger
Caution
A.3 Explanation of symbols
Failure to observe these instructions can result in danger to life from
electric voltage.
Danger
Failure to observe these instructions can result in serious damage to
health such as scalding, or even life-threatening injuries.
Warning
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.
- please read carefully!

5
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
A.5 Warranty
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.

6
B.2 Temperature resistance table for Pt1000 sensors:
B.1 Specification
°C 0 10 20 30 40 50 60 70 80 90 100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
Description
Electric specification:
Voltage 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

7
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.3 Description
Description
- 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.4 Scope of supply
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
B.5 Disposal

8
C.1.1
C.1.2
Warning
C.1 Wall installation
Install the controller in dry areas only.
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.
Installation

9
Installation
C.2 Electrical Wiring
Danger
Before working on the unit, switch off the power supply and secure
it against being switched on again! Check for the absence of power!
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.
Warning
Warning
Warning

10
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 cont-
roller in operation.
C.2.1
Installation
C.3 Installing the temperature sensors
The temperature sensor cables must be routed separately from mains voltage cables!
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!
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.
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.2.2
Caution
Warning
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).
Warning

11
The temperature sensor cables must be routed separately from mains voltage cables!
Installation
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 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)
S4
VFS2 VFS1CAN CAN
V1
-
S4 S3 S3 S2 S2 S1 S1 PELV N
R2 L N R1 N
D. - Terminal block wiring
Sensor connection
– max. 12V
On the controller board:
CAN1 CAN Bus connection
CAN2 CAN Bus connection
Warning
Mains voltage
230V
Danger
Warning
Mains voltage
230V
Danger
Sensor connection
– max. 12V

12
Description
D.1 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
devices under any circumstances. Depending on the specic application, additional system
components and safety components may be mandatory, such as check valves, safety
temperature limiters, scalding protectors etc., and must therefore be provided.
ΔT
Heat transfer between hot water storage
tanks
ΔT
Universal ΔT Shuto valve
Thermostat
S1
S1
S1
S1
S1
S1
S1
S1
S2
S2
S2
S2
S2
S4
S2
S2
S2
R1(V1)
R1(V1)
R1(V1) R1( V1)
R2
R2
R1(V1)
R1(V1)
S1 S1
S2
S2
S3
S3
R2
R2
R1(V1)
R1(V1)
Solar with hot water storage tank Solar with pool Solid fuel boiler with hot water storage tank
Solar with pool and heat exchanger
Solar with thermally stratied storage tank
Solar with heating circuit
Solar with thermostat (auxiliary heating) Solar with heating circuit
S1
S2
R2
S3
S4
R1(V1)
Warning

13
Description
Hydraulic variants
❄
Solar with thermostat and 3-way valve
Solar with cooling 1 (collector cooling)
Solar with heat exchange between hot
water storage tanks
Solar with hot water storage tank and
solid fuel boiler
Solar with cooling 2 (collector cooling)
S1
S1
S1
S1
S1
S1
S1 S1
S1
S1
S1
S4
S4
S2
S2
S2
S2
S2
S4
S3
S3
S2
S2 S2
S2
S2
S2
R2
S3
R2
S3 S3
S3
S4
R1(V1)
R1(V1)
R1(V1)
R1(V1)
R1(V1)
R2
R1(V1)
R1(V1)
R1(V1)
R1(V1)
R2
R2
R2
R2
R2
R2
R2
R2
R1(V1)
R1(V1)
Solar with pool and heat exchanger
Solar with bypass
Solar with 2 hot water storage tanks and
3-way valve
2 East/West solar arrays and 2 pumps Solar with 2 hot water storage tanks and 2
pumps
2 East/West solar arrays and 3-way valve
S1
S2
S4
R1(V1)
R2
Solar with heat exchanger

14
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
(1)
(2)
(3)
(4)
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
Operation
E.1 Display and input
Description
Hydraulic variants
Solar with cooling 3 (collector cooling)
S1
S2
S3
R1(V1)
R2
Solar with hot water storage tank and solid fuel
boiler and S4
2 East/West solar arrays
solid
fuel
boiler
collector
sensor radiator
pump
valve
3-way
valve R2 on
heat
exchanger
fan hot water
storage
tank
auxiliary
heating
ow
heater
pool
S1 S1
S2 S2
S3
S3
S4
S4
R1(V1) R1( V1)
R2
R2

15
E.2 Commissioning help – Setup wizard
Operation
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.
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.
auxiliary
heating
E.3 Free commissioning
Caution
Observe the explanations for the individual parameters on the following pages,
and check whether further settings are necessary for your application.

16
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:
Operation
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 selec-
ting “Exit 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
using the function of sensor compensation - see Chapter 6.7.
Which sensors are displayed will depend on the program selected, sensors
connected and settings.
Measurements
1. - Measurements
1. Measurements
2. Statistics
3. Operating mode
4. Settings
5. Protections
6. Special functions
7. Menu lock
8. Service data
9. Language
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
Caution

17
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”.
Statistics
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).
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
Resetting and deleting the individual analyses. The function “All statistics” clears all
statistics but not the error messages.
2.5. - Reset/clear
Display of the last 10 events occurring in the system with indication of date and time.
1. Measurements
2. Statistics
3. Operating mode
4. Settings
5. Protections
6. Special functions
7. Menu lock
8. Service data
9. Language
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
Caution
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
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.

18
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”.
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
3.1. - Automatic
Operating modes
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.
3.3. - Off
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.
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!
Warning
Danger

19
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.
4. - Settings
The system parameters are set in menu “4.
Settings”.
4.1. - Tmin S1
4.3. - Priority Storage 1
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 sen-
sor 1 drops below this value by 5 °C, then the pump and/or the valve are switched off
again.
This does not under any circum-
stances replace the safety elements
to be provided by the customer!
Settings
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.
4.4. - ΔT1 / ΔT (pool)
If the set temperature difference is too small, this may result in ineffective
operation, depending on the system and sensor positions.Special switching
conditions apply for speed control (see 6.3. - Speed control R1)!
Warning
Caution
Caution
Various settings can be made depending on the selection of hydraulic
variant 1-27. The following pages contain generally valid descriptions for
the settings.
The menu is closed by pressing “esc” or selec-
ting “Exit settings”.
4.1. - Tmin S1

20
Settings
4.5. - Tmax S2
4.6. - Priority Storage 2
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.
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.
Temperature values which are set high will allow higher solar heat
accumulation but it shall be checked that all system components are
resistant to high temperatures and scalding protection is provided.
Regulus solar thermal systems are safe for heating water up to 95 °C.
4.7. - ΔT2
4.8. - Tmax S3
4.13. - Tmax pool
Settings see “4.4. - ΔT1”
Settings see “4.5. - Tmax S2”
Switch-off temperature at pool sensor
If this value is exceeded at the applicable sensor, the controller switches the associa-
ted 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 the system. Scalding protection must be provided by the customer!
Danger
Danger